Journal articles: 'Flotation waste'

1

Du, Yunpeng, Xiong Tong, Xian Xie, Wenjie Zhang, Hanxu Yang, and Qiang Song. "Recovery of Zinc and Silver from Zinc Acid-Leaching Residues with Reduction of Their Environmental Impact Using a Novel Water Leaching-Flotation Process." Minerals 11, no. 6 (May 31, 2021): 586. http://dx.doi.org/10.3390/min11060586.

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Zinc-leaching residue (ZLR) is a strongly acidic hazardous waste; it has poor stability, high heavy metal levels, and releases toxic elements into the environment. ZLR has potential as a valuable resource, because it contains elevated levels of zinc and silver. In this paper, the recovery of zinc (Zn) and silver (Ag) from ZLR wastes from zinc hydrometallurgy workshops using water leaching followed by flotation was studied. During water leaching experiments, the zinc and copper recovery rates were 38% and 61%, respectively. Thereafter, various flotation testing parameters were optimized and included grinding time, reagent dosages, pulp density, flotation time, and type of adjuster. Experimental results demonstrated this flotation method successfully recycled Ag and Zn. A froth product containing more than 9256.41 g/t Ag and 12.26% Zn was produced from the ZLR with approximately 80.32% Ag and 42.88% Zn recoveries. The toxicity characteristic leaching procedure (TCLP) results indicated the water-leaching flotation process not only recycled valuable metals such as zinc and silver in zinc-containing hazardous wastes but lowered the hazardous waste levels to those of general wastes and recycled wastes in an efficient, economical, and environmentally friendly way.

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Retka, Jacek, Grzegorz Rzepa, Tomasz Bajda, and Lukasz Drewniak. "The Use of Mining Waste Materials for the Treatment of Acid and Alkaline Mine Wastewater." Minerals 10, no. 12 (November 27, 2020): 1061. http://dx.doi.org/10.3390/min10121061.

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The mining of metal ores generates both liquid and solid wastes, which are increasingly important to manage. In this paper, an attempt was made to use waste rocks produced in the mining of zinc and lead to neutralizing acid mine drainage and alkaline flotation wastewater. Waste rock is a quartz-feldspar rock of hydrothermal origin. It is composed of, besides quartz and potassium feldspar (orthoclase), phyllosilicates (chlorite and mica), and sulfides (chiefly pyrite). To determine its physicochemical parameters and their variability, acid mine water and flotation wastewater were monitored for 12 months. Acid mine drainage (AMD) is characterized by a low pH (~3), high zinc concentration (~750 mg·L−1), and high sulfate content (~6800 mg·L−1). On the other hand, the determinations made for flotation wastewater showed, among others, a pH of approximately 12 and ca. 780 mg·L−1 of sulfates. AMD and flotation wastewater neutralization by the waste rock was shown to be possible and efficient. However, in both cases, the final solution contained elevated concentrations of metals and sulfates. Premixing AMD with alkaline flotation wastewater in the first step and then neutralizing the obtained mixture with the waste rock was considered the best solution. The produced solution had a circumneutral pH. However, the obtained solution does not meet the legislative requirements but could be further treated by, for example, passive treatment systems. It is noteworthy that the proposed approach is low cost and does not require any chemical reagents.

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TAKAHASHI, Hiromichi. "Waste-paper Recycling by Flotation." Journal of Japan Oil Chemists' Society 42, no. 10 (1993): 834–39. http://dx.doi.org/10.5650/jos1956.42.834.

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Karamanov, Alexander, Mirko Aloisi, and Mario Pelino. "Vitrification of copper flotation waste." Journal of Hazardous Materials 140, no. 1-2 (February 2007): 333–39. http://dx.doi.org/10.1016/j.jhazmat.2006.09.040.

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Yu, Hui Mei, Hua Jun Wang, and Ai Fei Yi. "Detection Study on the Mineral Processing Reagents Preparation from Catering Waste Oil and Application on Ore Flotation." Advanced Materials Research 699 (May 2013): 119–25. http://dx.doi.org/10.4028/www.scientific.net/amr.699.119.

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The composition of catering waste oil is similar to that of traditional materials for the preparation of fatty acid collectors, which makes it possible to change catering waste oil into fatty acid collector applied to ore flotation. The collectors which come from catering waste oil are detected by FTIR and GC-MS analyses. The FTIR date shows that collectors contains lively carboxyl functional groups and The GC-MS date reveals that those carboxyl functional groups exist in single unsaturated fatty acid and three unsaturated fatty acid. The collectors can be applied to iron ore reverse flotation, apatite flotation, and fluorite flotation. It has better flotation experiment results than the traditional collector that using in field production.

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Fečko, Peter, Alena Kašpárková, Eva Pertile, Vlastimil Kříž, Barbara Tora, Andrzej Jarosiński, and Iva Janáková. "Application of pyrolysis residue from waste materials in black coal flotation." Polish Journal of Chemical Technology 12, no. 2 (January 1, 2010): 62–66. http://dx.doi.org/10.2478/v10026-010-0020-3.

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Application of pyrolysis residue from waste materials in black coal flotation The paper deals with the verification of the floatability of pyrolytic oils, which were obtained through the pyrolysis of waste, namely mixed plastics, tyres and waste rubber in combination with black coal from Lazy Mine, and classical collector Montanol 551 in black coal flotation. Black coal from ČSA OKD, a.s. coal preparation plant was used for flotation tests. The results imply that it is possible to produce collectors from waste materials which may be applied in the flotation of black coal. Next, the paper focused on the identification of a suitable combination of pyrolytic oils and Montanol 551 in order to reach ash content in the concentrate below 10%.

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Abbastabardelavar, Mohammadreza, Amir Izadi, and Fereshte Asadiamiri. "Investigating Effects of Coal Flotation Waste on Aged Hot Mix Asphalt Performance." Civil Engineering Journal 4, no. 10 (October 30, 2018): 2491. http://dx.doi.org/10.28991/cej-03091175.

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The present study was an attempt to investigate the effect of fresh and old coal flotation waste (coal waste), used as asphalt filler and additive, on the properties of hot asphalt mixtures in aged and un-aged condition. In this experimental study, fresh and old coal flotation waste, obtained from the Central Alborz Coal Washing Plant, were used to produce filler specimens (100% Wt.) as substitutes for limestone powder and asphalt additive (7% w.t). Finally, the performance of the asphalt mixture containing flotation waste was evaluated using Marshall Stability and indirect tensile tests. The afore-mentioned compounds were used to produce specimens under short-term aging conditions and the results were compared with other results obtained under un-aged condition. The results indicate that flotation waste improved performance of hot mix asphalt under short-term aging conditions.

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Li, Rong Gang, Xiao Feng Xie, and Chuan Shan Zhao. "Study of Flotation Deinking of Old Magazine and Mixed Office Waste Paper." Advanced Materials Research 550-553 (July 2012): 3267–72. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.3267.

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The effect of flotation parameters such as flotation consistency, temperature, flotation time, air to pulp ratio, and velocity of pulp flow (turbulence level) on OMG/MOW deinking efficiency was studied by using a high-consistency laboratory pulper and a laboratory deinking cell. The optimized flotation conditions were: flotation consistency 1.1%, 40°C, 8min, air to pulp ratio 40%, velocity of pulp flow 3.5m/s and pH 9.0. By using the optimized flotation conditions, the deinked pulp brightness could reach 70.56%ISO, 11.78%ISO higher than that of the control, the effective residual ink concentration was 108.46 mg/kg, which less than 378.14mg/kg of the control, theoretic deinking efficiency was up to 88.41%.

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Çoruh, Semra, Sermin Elevli, and Feza Geyikçi. "Statistical Evaluation and Optimization of Factors Affecting the Leaching Performance of Copper Flotation Waste." Scientific World Journal 2012 (2012): 1–8. http://dx.doi.org/10.1100/2012/758719.

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Copper flotation waste is an industrial by-product material produced from the process of manufacturing copper. The main concern with respect to landfilling of copper flotation waste is the release of elements (e.g., salts and heavy metals) when in contact with water, that is, leaching. Copper flotation waste generally contains a significant amount of Cu together with trace elements of other toxic metals, such as Zn, Co, and Pb. The release of heavy metals into the environment has resulted in a number of environmental problems. The aim of this study is to investigate the leaching characteristics of copper flotation waste by use of the Box-Behnken experimental design approach. In order to obtain the optimized condition of leachability, a second-order model was examined. The best leaching conditions achieved were as follows: pH = 9, stirring time = 5 min, and temperature = 41.5°C.

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Milosavljevic, Milutin, Dusan Mijin, Sandra Konstantinovic, Natasa Elezovic, Ljiljana Takic, and Ljubinka Drazevic. "A new procedure for the treatment of an industrial waste containing flotation reagents." Chemical Industry 68, no. 3 (2014): 331–39. http://dx.doi.org/10.2298/hemind130618059m.

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Flotation reagents can be transformed to industrial waste if they are stored for a long period of time. Also, if synthesis or drying process is not performed under defined conditions in industrial plants, which produce flotation reagents, batch of waste may arise and be stored as a waste. The chemical composition of this waste depends on the phase in which it was created, but typically includes: unreacted alkali hydroxide, solvent - alcohol and trithiocarbonate and oxidation product - dixanthogenate. In this paper a new laboratory procedure for the treatment of such wastes is described. The identification and separation of industrial waste components is also included. From the separated dixantogenate and xanthate a laboratory synthesis of thioncarbamates is given. In addition, a semi-industrial treatment of waste xanthate is presented. Synthesis of N-alkyl and N,N-dialkyl-O-isobutylthioncarbamates were obtained from the filtrate obtained in the first step. As a by-product, sodium thioglycolate was produced. This by-product is transformed to a thioglycolic acid by the addition of an acid. Also, the synthesis of thioncarbamates from dixanthogenates, isolated from industrial waste as a cake, is desribed. Described waste treatment is additionally interesting due to the production of sulphur as another by-product. Laboratory synthesis gave thioncarbamates in yields from 69.7 to 87.7 %, while the semi-industrial process for the selected batches produced thioncarbamates in yields from 74.2 to 80.5 %. Taking into account the importance of the synthesized compounds as selective flotation reagents, a new procedure of their synthesis from industrial waste is characterized by good yields and purity of the obtained compounds, the simplicity of process, low environmental impact and short reaction times of synthesis.

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Cruz, Constanza, Sebastián Herrera-León, Daniel Calisaya-Azpilcueta, Ruth Salazar, Luis A. Cisternas, and Andrzej Kraslawski. "Using Waste Brine from Desalination Plant as a Source of Industrial Water in Copper Mining Industry." Minerals 12, no. 9 (September 14, 2022): 1162. http://dx.doi.org/10.3390/min12091162.

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One of the main challenges of seawater desalination is a large volume of waste brine production that is commonly discharged into the sea and may threaten the marine ecosystem. This is critical in regions where conventional water resources are scarce and desalinated seawater is an alternative to meet water demand. Especially in regions where the mining industry is a key player in the economic development. The novelty of this research consists in the determination of the potential use of waste brine, discharged from the reverse osmosis process, as a source of industrial water in copper mining industry. To enable the waste brine applicability, there should be reduced calcium and magnesium ions concentration for improving copper recovery in the froth flotation process. The flotation tests were conducted in a batch cell with synthetic minerals composed of chalcopyrite, kaolinite, and quartz using different water qualities. The results showed that treated waste brine significantly improved copper recovery compared to untreated waste brine and seawater. Similar copper recovery was achieved when flotation test was performed with tap water and treated waste brine. Therefore, treated waste brine could provide a suitable water quality required in the froth flotation process as an alternative non-conventional water resource.

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12

Kiuru, H. J. "Tertiary Waste Water Treatment with Flotation Filters." Water Science and Technology 22, no. 7-8 (July 1, 1990): 139–44. http://dx.doi.org/10.2166/wst.1990.0239.

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Tertiary waste water treatment has been usually carried out by adding filtration after an activated sludge process, which can be fitted with pre- or simultaneous precipitation for removal of phosphorus. Filtration is operated either as a mechanical unit operation for upgrading the removal of suspended solids only, or as contact filtration where the precipitation of phosphorus is boosted with a minute dose of trivalent iron or aluminium. Instead of using conventional downflow filters, tertiary treatment can also be carried out with flotation filters where flotation is accomplished in the head above the filter, necessary for filtration in any case. The possibility of using flotation between secondary clarification (sedimentation) and filtration, when it is needed, results in a very good load bearing capacity and in a high degree of removal of solids. This means that excellent operational results can be achieved with an almost complete reliability in all operational circumstances at a very reasonable cost. Long experience in Finland from a medium size (30 000 pe) activated sludge plant with simultaneous precipitation fitted with flotation filter tertiary treatment in 1984, shows that values of BOD7 ≤ 5 mg/l, Ptot ≤ 0.3 mg/l NH4-N ≤ 1 mg/l and of suspended solids ≤ 5 mg/l can be continuously achieved, in the treatment of municipal waste water where total nitrification is applied.

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13

Li, Siwei, Zhengqi Guo, Jian Pan, Deqing Zhu, Tao Dong, and Shenghu Lu. "Stepwise Utilization Process to Recover Valuable Components from Copper Slag." Minerals 11, no. 2 (February 17, 2021): 211. http://dx.doi.org/10.3390/min11020211.

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Waste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In this paper, a stepwise extraction process was proposed to recover valuable elements (copper, iron, lead and zinc) from waste copper slag. The specific procedures are as follows: (1) A flotation process was adopted to enrich copper, and when the copper grade in the flotation concentrate was 21.50%, the copper recovery rate was 77.78%. (2) The flotation tailings were pelletized with limestone, then the green pellets were reduced, and the magnetic separation process was carried out. When the iron and copper grades in the magnetic concentrate were 90.21% Fe and 0.4% Cu, 91.34% iron and 83.41% copper were recovered, respectively. (3) Non-magnetic tailings were mixed with clinker and standard sand to produce common Portland cement. Several products were obtained from the waste copper slag through the proposed process: flotation concentrate, measured 21.50% Cu; magnetic concentrate, containing 90.21% TFe and 0.4% Cu; direct reduction dust, including 65.17% ZnO and 2.66% PbO; common Portland cement for building construction. The comprehensive utilization method for waste copper slag achieved zero tailing and has great potential for practical application.

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Wasowski, J. "Application of dissolved air flotation for treatment of wastewater from meat processing industry." Water Science and Technology 31, no. 3-4 (February 1, 1995): 341–44. http://dx.doi.org/10.2166/wst.1995.0542.

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The paper concerns the application of dissolved air flotation for treatment of waste water from the meat processing industry. The main aim of the study was identification of the flotation mechanism aided by the coagulation in the layouts with and without recycling, and finding and defining the role of the technological factors influencing flotability of pollutants found in the given waste waters. The results of the studies, supported by the mathematical analysis, form the basis of rational design and conduction of flotation in practice.

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Baran, Agnieszka, Małgorzata Śliwka, and Marcin Lis. "Selected Properties of Flotation Tailings Wastes Deposited in the Gilów and Żelazny Most Waste Reservoirs Regarding Their Potential Environmental Management / Wybrane Właściwości Odpadów Poflotacyjnych Zdeponowanych W Zbiornikach Gilów I Żelazny Most W Aspekcie Możliwości Ich Zagospodarowania Przyrodniczego." Archives of Mining Sciences 58, no. 3 (September 1, 2013): 969–78. http://dx.doi.org/10.2478/amsc-2013-0068.

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Abstract Wastes originating from copper mining, particularly generated during the ore enrichment process constitute a considerable percentage of industrial wastes in Poland, which theoretically are supposed to provide a raw material base but remain wholly unmanaged. Wastes from copper flotation are deposited on the waste dumps which pose a significant eco-toxicological hazard. The paper discussed the results of analysis of selected post-floatation waste properties deposited in the Żelazny Most and Gilów reservoirs from the perspective of their environmental management.

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Dai, Shu Juan, Shu Yong Yang, and Dong Qin Zhou. "The Influence of Coexisting Ions on Adsorption-Flotation of Pb2+ in Water by Gordona Amarae." Advanced Materials Research 433-440 (January 2012): 183–87. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.183.

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Processing waste water of heavy metals by biosorption-flotation was effected by many factors. Existing coexisting ions in waste water is a important factor. The influence of coexisting alkaline-earth metals ions and heavy metals ions of Cd 2+, Cu 2+, Hg 2+, Zn 2+, As 3+, on results of adsorbing and floating Pb2+ in waste water was examined by using Gordona amarae as adsorbent and laurylamine as collector. The results showed that different sort of heavy metals ions and alkaline-earth metals ions have different influences on biosorption-flotation. The influences on biosorption-flotation by coexisting ions showed that ions exchange mechanism, surface complexation mechanism, oxidation-deoxidize and inorganic micro precipitation mechanism exist probably

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Delitsyn, L. M., Yu V. Ryabov, R. V. Kulumbegov, M. G. Sulman, Yu Yu Kosivtsov, and M. Yu Zavadko. "Complex Technology of Ash and Slag Waste from Power Plants." Ecology and Industry of Russia 25, no. 7 (July 20, 2021): 20–25. http://dx.doi.org/10.18412/1816-0395-2021-7-20-25.

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The development of a comprehensive technology for the processing of ash waste (ASW), which is based on the extraction of carbon from the CSO by flotation method and iron-containing minerals by means of magnetic separation, is presented. The proposed approach is based on the extraction of carbon from ash and slag by flotation and iron-containing minerals by magnetic separation. In this work, the optimal size of the ash fraction supplied for flotation was established. It is shown that when the technological process is carried out according to the stadium scheme when flotation reagents are fed in fractions, it allows their consumption to be reduced and the recovery of carbon concentrate from underburning to be significantly increased. The developed technology was tested on a pilot plant. High-quality carbon, iron-containing and aluminosilicate products were obtained. Auxiliary enrichment processes such as classification, thickening and filtration were tested.

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Seksenova, Nazym, Rudolf Bykov, Sergey Mamyachenkov, Gulzhan Daumova, and Malika Kozhakanova. "Optimization of Conditions for Processing of Lead–Zinc Ores Enrichment Tailings of East Kazakhstan." Metals 11, no. 11 (November 9, 2021): 1802. http://dx.doi.org/10.3390/met11111802.

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This article presents the results of studies of a low-waste technology for processing enrichment tailings using a combined enrichment–hydrometallurgical method. After washing the enrichment tailings from harmful products and reducing their size, multi-stage flotation of the crushed material of the enrichment tailings was carried out. The use of a new reagent in the flotation process was studied in order to ensure the maximum recovery of the main valuable components from the enrichment tailings. A new collector of Aero 7249 (Shenyang Florrea Chemicals Co., Ltd., Shenyang, China) type was used for the flotation. The recovery of valuable components was as follows: Cu, 6.78%; Zn, 91.69%; Pb, 80.81%; Au, 95.90%; Ag, 82.50%; Fe, 78.78%. Tailings of the flotation were re-enriched using a fatty acid collector (sodium oleate). Additional (reverse) flotation resulted in obtaining a product corresponding to the composition of building sand in terms of the content of valuable components of the waste rock. The studies of the conditions for processing the enrichment tailings of lead–zinc ore indicate the possibility of its optimization in order to maximize the involvement of waste in the production.

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Pouet, M. F., and A. Grasmick. "Urban wastewater treatment by electrocoagulation and flotation." Water Science and Technology 31, no. 3-4 (February 1, 1995): 275–83. http://dx.doi.org/10.2166/wst.1995.0536.

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In waste water treatment, the use of a physico-chemical process by flotation would present some advantages compared to a separation by settling. However like each physico-chemical process, a separation by flotation needs a chemical destabilization. We have studied the use of an electrochemical destabilization coupled to a process of flotation (DAF). This paper presents the results obtained on an urban waste water treated by electrocoagulation and dissolved air flotation (DAF). To show the interest of coupling flotation and electrocoagulation, we have studied each process separately. Then we have combined the two processes. The role of each operation on pollution removal is presented. An effect of synergism between the two processes on the pollution abatement is shown. A reduction of 75% of the global COD is obtained. The results of the coupling are compared to the performance of an intensive treatment by flocculation-lamellar settler.

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Ristović, Ivica, Darina Štyriaková, Iveta Štyriaková, Jaroslav Šuba, and Emilija Širadović. "Bioleaching Process for Copper Extraction from Waste in Alkaline and Acid Medium." Minerals 12, no. 1 (January 15, 2022): 100. http://dx.doi.org/10.3390/min12010100.

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Flotation wastes are becoming a valuable secondary raw material and source of many metals and semimetals worldwide with the possibilities of industrial recycling. The flotation tailings contain oxide and sulfide minerals that have not been sufficiently stabilized and form acidic mine waters, which in turn contaminate groundwater, rivers, and reservoi6sediments. An effective way to recycle these mine wastes is to recover the metals through leaching. While the focus is on acid bioleaching by iron- and sulfur-oxidizing bacteria, alkaline leaching, and the removal of iron-containing surface coatings on sulfide minerals contribute significantly to the overall environmental efficiency of leaching. For this study, static and percolate bioleaching of copper from flotation waste at the Bor copper mine in Serbia was investigated in alkaline and then acidic environments. The aim of the study was to verify the effect of alkaline pH and nutrient stimulation on the bioleaching process and element extraction. A sample was taken from a mine waste site, which was characterized by XRF analyses. The concentration of leached copper was increased when copper oxide minerals dissolved during alkaline bioleaching. The highest copper yield during alkaline bioleaching was achieved after 9 days and reached 67%. The addition of nutrients in acidic medium enhanced the degradation of sulfide minerals and increased Cu recovery to 74%, while Fe and Ag recoveries were not significantly affected. Combined bioleaching with alkaline media and iron- and sulfur-oxidizing bacteria in acidic media should be a good reference for ecological Cu recovery from copper oxide and sulfide wastes.

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Abdrakhimov, V. Z. "APPLICATION OF ANTHRACITE FLOTATION ENRICHMENT WASTE IN PRODUCTION OF POROUS AGGREGATE BASED ON LIQUID-GLASS COMPOSITIONS." Construction and Geotechnics 11, no. 1 (December 15, 2020): 92–101. http://dx.doi.org/10.15593/2224-9826/2020.1.09.

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Reduction of reserves of traditional natural raw materials for production of porous aggregates forces to look for new ways of its replacement by various types of technogenic raw materials. At the same time, the experience of advanced Western foreign countries has shown the practical, economic, environmental and technical feasibility of this direction and application as a tool for protecting the natural environment from pollution. In the present work it is shown that the most appropriate use wastes fuel and energy complex in the manufacture of insulating materials, such as porous aggregates with heat conductivity not more than 0.25 W/m•operating system. Waste from anthracite flotation enrichment was used as a thinning agent and burnout additive. Waste flotation enrichment of anthracites have an increased content of PP (loss during calcination = 42.4 %) and carbon content (C = 13.84 %), so they were used for the production of porous aggregate not only as a thinner, but also as burnout additives. Developed on the basis of waste flotation enrichment of anthracites and beet compositions for porous aggregates, which have high rates of compressive strength and softening factor, and the mark on the bulk density does not exceed M400. Studies have shown that the porosity on the exterior of the product, in contrast to the internal almost no form, ie waste flotation enrichment of anthracites contributes to the porous filler closed pores. The presence of pores of isometric shape and oval closed porosity in the porous filler gives it mechanical strength, and slit-like pores have a harmful effect. Innovative proposals for obtaining a porous aggregate have been developed. A patent of the Russian Federation was obtained for the obtained method of producing a porous filler based on a liquid-glass composition.

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Cieciura-Włoch, Weronika, and Sebastian Borowski. "BIOHYDROGEN PRODUCTION FROM WASTES OF PLANT AND ANIMAL ORIGIN VIA DARK FERMENTATION." Journal of Environmental Engineering and Landscape Management 27, no. 2 (May 30, 2019): 101–13. http://dx.doi.org/10.3846/jeelm.2019.9806.

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This study investigated the batch experiments on biohydrogen production from wastes of plant and animal origin. Several substrates including sugar beet pulp (SBP), sugar beet leaves (SBL), sugar beet stillage (SBS), rye stillage (RS), maize silage (MS), fruit and vegetable waste (FVW), kitchen waste (KW) and slaughterhouse waste (SHW) including intestinal wastes, meat tissue, post flotation sludge were tested for their suitability for hydrogen production. Generally, the substrates of plant origin were found to be appropriate for dark fermentation, and the highest hydrogen yield of 280 dm3 H2/kg VS was obtained from fruit and vegetable waste. Contrary to these findings, slaughterhouse waste as well as kitchen waste turned out to be unsuitable for hydrogen production although their methane potential was high. It was also concluded that the combined thermal pretreatment with substrate acidification was needed to achieve high hydrogen yields from wastes.

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Rostovtsev, V. I., and S. A. Kondratiev. "Improvement of lead-zinc ore mining waste processing." Interexpo GEO-Siberia 2, no. 3 (May 18, 2022): 286–94. http://dx.doi.org/10.33764/2618-981x-2022-2-3-286-294.

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Expansion of mineral reserves and resources in Russia is currently connected with larger scale commercialization of rebellious ore and mining waste, and the percentage of the latter continuously grows. Due to the complex material constitution of minerals, their similar physicochemical and processing properties, as well as because of deficient ore pre-treatment, up to 20% of valuable minerals and metals are lost with tailings, mostly with very fine particles less than 10 µm. It is of the great concern to improve processing technologies for ore and mining waste. This research aims to analyze mineral compositions of tailings after lead-zinc ore flotation, and to identify causes of lead and zinc losses with the flotation tailings. The technology tests reveal that the losses lead and zinc in the form of micron size grains of galena (PbS) and wurtzite (ZnS) are connected with their aggregation with other minerals (quartz, pyrite, magnetite, etc.). The tests with physical (radiation) treatment show dissociation ability of aggregates with subsequent separation of minerals by flotation. The presence of magnetic magnetite in flotation tailings makes it possible to implement magnetic separation to increase the contents of lead and zinc in the concentrate. The scientific novelty and practical significance of this research consists in the proved expediency of radiation treatment of minerals and mining waste toward modification of their processibilty to ensure reduction in loss of valued components with tailings and to enhance environmental safety of mining waste.

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Yang, Li Jun, Yue Jun Zhang, Tian Ran Feng, and Feng Wu. "Refining Slag Treatment with Flotation Cell." Advanced Materials Research 878 (January 2014): 330–37. http://dx.doi.org/10.4028/www.scientific.net/amr.878.330.

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In past years, the exploitation of mineral resource in our country was stressed on capacity and the solid waste recycle and innocent treatment was ignored. Much valuable metal is associated and coexist with waste, it is in difficult position for present technology to recycle valuable composition in that waste, which leads to valuable component loss and environment pollution. Therefore, the development and utilization of copper refining slag is in significance. In this paper, the advantages and difficulties to process refining slag by flotation method are discussed based on property analysis of copper refining slag. The refining slag is featured by high specific gravity, high concentration, and its particles distributing at both ends of small and large size. A flotation cell with special structure of barrier grid plate and multi-loop channel is developed for refining slag processing, which provides a proper way to solve the sediment problem during refining slag flotation. The application of CLF-40(effective volume,40m3) flotation cell for processing slag mixture from flash furnace and converter is expounded, the production index shows that the Cu grade is up to 27.18% at recovery of 83.93% when slurry concentrate being 70%

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Matveeva, Tamara N., Viktoriya V. Getman, Nadezhda K. Gromova, and Anna Yu Karkeshkina. "Contemporary Research and Developments in the Low-Toxic Chelating Reagents for the Extraction of Non-Ferrous and Noble Metals from Poor Polymetallic Ores and Processing Tailings." Sustainability 14, no. 23 (December 6, 2022): 16262. http://dx.doi.org/10.3390/su142316262.

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An urgent technological, economic and environmental task of mining and metallurgical enterprises is to involve poor, off-balance and hard-to-beneficiate ores in the technological process, as well as accumulated and current waste from mining and metallurgical industries. As the reserves of developed deposits are depleted, technogenic objects may become a priority, and in some cases the only, source of mineral raw materials. Mining wastes represent a large reserve of raw materials for the extraction of non-ferrous and precious metals, and at the same time, they are centers of local or regional environmental pollution. Stale waste re-processing may promote territorial cultivation and reduce the environmental burden. The conventional methods of poor ore and waste treatment do not fully provide for a sufficient separation degree of high metal extraction, and lead to significant valuable ore losses, while the quality of the obtained concentrates often does not meet the requirements for subsequent technological process. In this regard, the development of novel chelating agents with specific functional groups that can selectively adsorb on the mineral surface, change the contrast of chemical surface composition and improve the flotation properties of mineral complexes, is an innovative solution for increasing their flotation selectivity. Furthermore, the synthesis and application of novel flotation reagents may help to replace toxic reagents by ecologically friendly or less-toxic ones.

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Erkinbaeva, N., E. Ysmanov, and Y. Tashpolotov. "The Use of Technogenous Waste from the Kadamjai Antimony Plant as a Raw Material for the Production of Portland Cement." Bulletin of Science and Practice 7, no. 3 (March 15, 2021): 206–11. http://dx.doi.org/10.33619/2414-2948/64/21.

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The article investigates the temperature regime and the amount of heat required for sintering a mixture obtained from industrial waste (dump slag, flotation tailings) with the addition of natural clay. The chemical composition of industrial waste (slag, dump, flotation tailings) and natural clay, which are suitable for use as raw material for the production of Portland cement and other building materials, have been investigated. Utilization of man-made waste (Kadamzhai antimony plant) will help improve the environmental situation in the region, and on the other, reduce material costs of production to obtain new products.

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Nikanorov, A. V. "Improvement of the Technology of Fluorine Recovery from Solid Waste of Primary Aluminum Production." Materials Science Forum 1052 (February 3, 2022): 493–97. http://dx.doi.org/10.4028/p-7p174d.

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The possibility of using modern high-tech flotation equipment at RUSAL Bratsk PJSCis considered, which allows to significantly reduce discharges of extremely hazardous waste of fluorine, sodium, and aluminum to the sludge fields, and to initiate recycling of waste from the sludge fields. The results of operation are presented for a coal foam column flotation system at PJSC RUSAL Bratsk. An innovative technique has been developed allowing to recycle lining waste from aluminum electrolysis pots. The recycling of the waste lining coming from aluminum electrolysis pots is a completely closed waste-free cycle, which provides alumina and cryolite — products that can be used in the aluminum electrolysis, as well as allows using all the secondary solid waste in the satellite cement production.

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Fang, Ji, Yingyong Ge, Zhijie Chen, Baolin Xing, Shenxu Bao, Qing Yong, Ruan Chi, Siyuan Yang, and Bing-Jie Ni. "Flotation purification of waste high-silica phosphogypsum." Journal of Environmental Management 320 (October 2022): 115824. http://dx.doi.org/10.1016/j.jenvman.2022.115824.

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Wei, Guoxia, Hanqiao Liu, Fang Liu, Tongtong Zeng, Guisheng Liu, and Jianhua Zhou. "Experimental Investigation of the Decarburization Behavior of Medical Waste Incinerator Fly Ash (MWIFA)." Processes 6, no. 10 (October 8, 2018): 186. http://dx.doi.org/10.3390/pr6100186.

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The objective of the research was to compare the flotation performance of medical waste incinerator fly ash (MWIFA) by considering two methods: the cyclonic-static micro-bubble flotation column (FCSMC) method and conventional flotation cell (CFC) method. The results indicated that for FSCMC, the optimum parameters were kerosene = 3.5 g/kg·ash, methyl isobutyl carbinol (MIBC) = 0.2 g/kg·ash, Tween 80 = 7.5% of kerosene concentration, slurry concentration = 100 g/L, and pump speed = 380 r/min. The optimized conditions resulted in a higher dioxin removal efficiency (90.98%), carbon removal efficiency (91.88%) and lower loss on ignition (LOI) (4.96%). The data obtained from the CFC under different optimum operating conditions were 88.65%, 90.63% and 5.68%, respectively. FSCMC was proven to be more efficient for the flotation of MWIFA than CFC.

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Huang, Luoluo, Hui Wang, Chongqing Wang, Junyao Zhao, and Bo Zhang. "Microwave-assisted surface modification for the separation of polycarbonate from polymethylmethacrylate and polyvinyl chloride waste plastics by flotation." Waste Management & Research: The Journal for a Sustainable Circular Economy 35, no. 3 (December 15, 2016): 294–300. http://dx.doi.org/10.1177/0734242x16682078.

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Microwave-assisted potassium permanganate modification (MPPM) was used for the flotation separation of polycarbonate (PC) from polyvinyl chloride (PVC) and polymethylmethacrylate (PMMA) waste plastics. The separation process was optimized by investigating the potassium permanganate concentration, treatment time, flotation time and frother concentration. MPPM selectively reduced the flotation recovery of PC. The optimum conditions were determined to be: potassium permanganate concentration, 2 mM/L; treatment time, 1 min; frother concentration, 17.57 g/L; and flotation time, 1 min. PC was efficiently separated from PVC and PMMA under the optimum conditions. The purity of the separated PC was 97.71%. The purity and recovery of PVC and PMMA were both >95%. The modification mechanism was investigated using the water contact angles, Fourier transform infrared spectrometry and scanning electron microscopy. This work provides technical insights into the industrial recycling of waste plastics.

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Tang, Min, and Shu Ming Wen. "The Harmonious Design on the Beneficiability of the Pt-Pd Ores Containing High-MgO Gangues in Yunnan." Advanced Materials Research 634-638 (January 2013): 3551–57. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3551.

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Flotation characteristics of the fine-disseminated copper-nickel sulfides containing Pt and Pd and thermodynamic properties of high amounts of serpentine gangues by diluted acidic leaching in the ore sample of Yunnan were investigated by bench flotation tests and acidic leaching tests and their combination tests have also been conducted to exploit the harmonious design to extract all the values from the ore sample. Based on the results of bench flotation tests, it has been suggested that traditional flotation with the target of only metallic values in the ore was not available and profitable due to the fact that it was inevitable of the deteriorated dilution of serpentines in the flotation concentration using common various kinds of flocculants or depressants, in which the content of MgO in the concentrate was around 20.0%, while leaching tests by waste acids from producing TiO2 indicated that this may be a promising method to extract MgO andα-Fe2O3 from the ore sample, since it can weaken the disturbance of serpentines significantly and lead a satisfied results of the Cu-Ni sulfide flotation. In this study, a harmonious flow-sheet, which involves leaching by waste acids and traditional flotation process, had been designed with the objective of extracting the metallic values and two non-metallic products, which includesα-Fe2O3 and MgO, from the ore sample. It is worthy noticed that the acidic waste liquids from a TiO2 company in Panzihua was used as leaching agent, which can dissolve 98.81% Mg2+ and 78.43% Fen+ with little Ni2+ and Cu2+. By the comparison of the flotation results and benefits between traditional flotation alone and harmonious design, besides the two more qualified non-metallic products, α-Fe2O3 and MgO, a better concentrate containing a grade of only 2.64% MgO at the grades of 2.58% Cu, 2.97% Ni and 81.02 g/t Pt+Pd with the recoveries of 93.79% Cu, 83.14% Ni and 79.19% Pt+Pd respectively, were harvested from the harmonious design.

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Zhu, Huan Ying, and Ming Zhou. "Air Flotation Method in the Treatment of Oily Wastewater Application of its Progress." Advanced Materials Research 971-973 (June 2014): 2044–47. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.2044.

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With the social development, environmental pollution problems are emerging, especially oily wastewater discharges, it has been seriously polluted our water, therefore, the oily wastewater treatment technology research become a research hotspot. This paper briefly describes the characteristics of oily waste water, water purification technology and flotation theory, and flotation technology in the oily wastewater treatment applications were reviewed, Finally, the future prospects for the development flotation method.

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Patrakov, Yuriy, Svetlana Semenova, and Anna Usanina. "Improving the quality of coal is one of the factors in intensification of combustion processes in coal-based energy." MATEC Web of Conferences 194 (2018): 01043. http://dx.doi.org/10.1051/matecconf/201819401043.

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For flotation enrichment of coals, spent engine oils modified with ozone were used. Preliminary ozonation contributes to the increase in the share of low-boiling components in the compositions of spent oils, also it reduces the viscosity of reagents and improves their flotation properties when coals are enriched. By flotation of coal, using ozonized spent oils, the yield of concentrate significantly increases, ash content is reduced, mineralization of waste flotation is increased, and as a result, the selectivity of the process is increased as well.

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Ksenofontov, B. S., A. S. Kozodayev, R. A. Taranov, and M. S. Vinogradov. "Improvement of Efficiency of Waste Water Treatment from Metals Using Flotation Combines." Ecology and Industry of Russia 24, no. 10 (October 14, 2020): 4–7. http://dx.doi.org/10.18412/1816-0395-2020-10-4-7.

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The work deals with the use of flotation combines for the treatment of waste water from heavy metals. The analysis of various methods of treatment of waste water from heavy metals was carried out, which revealed the most promising technical solutions with their possible implementation for modernization of existing treatment facilities of the enterprise. Experimental studies of several versions of technological schemes were carried out on the basis of which a technological scheme of waste water treatment was selected, including all positions of equipment existing at local treatment facilities, and supplemented with a reagent treatment unit, treatment in a flotation complex using reagents, application of filters and pH correction.

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Петрова, E. Petrova, Виноградов, M. Vinogradov, Балина, A. Balina, Таранов, et al. "Power Plants’ Coal Ash Treatment in Processes related to Bacterial Leaching of Rare Earth Metals." Safety in Technosphere 2, no. 4 (August 25, 2013): 17–22. http://dx.doi.org/10.12737/716.

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The flotation process of power plants’ ash-slag materials treatment is considered in the article. The original method related to preparing of ash-slag waste before their further bioleaching processing is proposed. The positive results of rare earth metals extraction efficiency increase by bioleaching are obtained. The essence of proposed approach is as follows. Coal combustion’s ash-slag waste is mixed with water to obtain a fine suspension, in which the carbonaceous reagent is injected. Flotation treatment of ash suspension is carried out in mechanical flotation machine with flotation time equal to 15-18 min and air flow rate equal to about 0.7-0.8 m3/(m2·min). The chamber product as treated ash suspension is going to the separation in open hydrocyclone. In such a case the concentration product in the form of ash product is derived to special site, and hydrocyclone overflow is directed to the clearing in pressure flotation machine for extraction of metal ions from the liquid. A positive effect of rare earth metals’ extraction rising related in particular to scandium about 26.6-30.3%, yttrium — 28-34.7%, lanthanum — 50.5-21.5%, as well as precious metals such as gold — 18.7-21.6%, silver — 11.4-21.4% is obtained.

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36

Sobianowska-Turek, Agnieszka, Katarzyna Grudniewska, Paweł Maciejewski, and Małgorzata Gawlik-Kobylińska. "Removal of Zn(II) and Mn(II) by Ion Flotation from Aqueous Solutions Derived from Zn-C and Zn-Mn(II) Batteries Leaching." Energies 14, no. 5 (March 1, 2021): 1335. http://dx.doi.org/10.3390/en14051335.

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The Zn(II) and Mn(II) removal by an ion flotation process from model and real dilute aqueous solutions derived from waste batteries was studied in this work. The research aimed to determine optimal conditions for the removal of Zn(II) and Mn(II) from aqueous solutions after acidic leaching of Zn-C and Zn-Mn waste batteries. The ion flotation process was carried out at ambient temperature and atmospheric pressure. Two organic compounds used as collectors were applied, i.e., m-dodecylphosphoric acid 32 and m-tetradecylphosphoric 33 acid in the presence of a non-ionic foaming agent (Triton X-100, 29). It was found that both compounds can be used as collectors in the ion flotation for Zn(II) and Mn(II) removal process. Process parameters for Zn(II) and Mn(II) flotation have been established for collective or selective removal metals, e.g., good selectivity coefficients equal to 29.2 for Zn(II) over Mn(II) was achieved for a 10 min process using collector 32 in the presence of foaming agent 29 at pH = 9.0.

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37

Petkovic, Aleksandar, Sonja Petkovic, and Srdjana Magdalinovic. "Utilization of slaked lime for the regulation of pH value in the process of copper." Chemical Industry 63, no. 1 (2009): 61–66. http://dx.doi.org/10.2298/hemind0901061p.

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The investigations of used lime at plant from company Messer-Tehnogas, Belgrade, were in the aim to improvement technologically results from flotation concentration of copper minerals in flotation plant Veliki Krivelj. This paper shows usage of slaked lime, which is waste in the process of technical gas production, for regulation of pH value in the process of copper minerals flotation concentration. It is important to point out that slaked lime is a waste material that is not dangerous. Preparation and dosage includes preparation procedures, which enable introduction into flotation process with the aim of achieving better results. Lime from Limekiln Zagradje is brought into four storage places in flotation. Volume of each storage place is 80 m3. Lime in pieces from storage place is added by airbladders on transportation line and by system of transportation lines lime gets to the ball mill. At the mill entrance water is added and then follows lime grinding. Milk glass of lime thus prepared goes to the pump basket from where is transported by pipeline to conditioner, and then by manual and (or) automatic valves it is dosed to the flotation concentration of copper minerals process. Prospect of advancement and rationalization of the used lime in flotation plant Bor, Veliki Krivelj and Majdanpek as well as a way to link different branches of industry was demonstrated. Total cost of lime supplying, transporting, preparation and distribution related slaked lime is lower for 2.955 din/kg. Particularly, using lime from Messer in content of 2.1 g/l value of pH 11.82 is possible to obtain.

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SHIBATA, Junji, Shigeno MATSUMOTO, Eishi KUSAKA, Hideki YAMAMOTO, and Yoshio MORIMOTO. "Feasibility of Flotation to Separation of Waste Plastics." Shigen-to-Sozai 112, no. 3 (1996): 177–84. http://dx.doi.org/10.2473/shigentosozai.112.177.

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39

Pulungan, L., D. N. Usman, E. A. Kurniawan, and R. A. Galiano. "Monitoring of mine waste from copper ore flotation." IOP Conference Series: Materials Science and Engineering 830 (May 19, 2020): 042041. http://dx.doi.org/10.1088/1757-899x/830/4/042041.

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40

Tanhua, Antti, Maria Sinche-Gonzalez, Reijo Kalapudas, Pekka Tanskanen, and Pertti Lamberg. "Effect of waste rock dilution on spodumene flotation." Minerals Engineering 150 (May 2020): 106282. http://dx.doi.org/10.1016/j.mineng.2020.106282.

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41

Čiẑinská, Simona, Vít Matěj⊙, Claes Wase, Yvonne Klasson, Jakub Krejcí, and Gunnel Dalhammar. "Thickening of waste activated sludge by biological flotation." Water Research 26, no. 2 (February 1992): 139–44. http://dx.doi.org/10.1016/0043-1354(92)90212-m.

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42

Wu, Cai Bin, Gui Ming Shi, and Cui Ping Yan. "Study on Wet Treatment Process of Waste Printed Circuit Boards." Advanced Materials Research 518-523 (May 2012): 3621–26. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3621.

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The dry crushing of wasted printed circuit boards (PCBs) can make secondary contamination. In this paper, a wet comminution process is put forward to solve the difficulties. For the comminution product, the distributions of particle size, liberation degree and metal grade are analyzed, and for the product below 1mm, a wet metal beneficiation process combined with shaking table and flotation is employed. The results show that the Whole PCBs could be comminuted by the MX wet impact crusher, and the cumulative yield, liberation degree, total metal content and its copper grade of the product below 1mm is 83.49%, 97%, 83.46% and 20.50%respectively, and that metal concentrates could be beneficiated by XZY wet shaking table, and the yield, total metal weight, copper grade of the metal concentrate, the recovery of total metal and copper is 34.87%, 88.99%, 50.73%,79.90% and 78.07% respectively keeping the feeding concentration at 20% and water consumption in 1100L/h. For these metals included by shaking-table middling, the separation of both flotation and shaking table is carried out, and the total metal content and its copper grade, recovery in metal concentrate 2′ is 72.07% , 31.59% and62.04% respectively, meanwhile the copper grade of tailings in flotation and shaking table are decreased to 1.26% and 2.94%. The wet treatment process can effectively concentrate these valuable metals from waste PCBs.

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43

Fujisaki, K., and M. El-Zahar. "A mathematical model for the flotation of waste activated sludge." Water Science and Technology 46, no. 11-12 (December 1, 2002): 203–8. http://dx.doi.org/10.2166/wst.2002.0739.

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A mathematical model that describes a batch flotation process is presented. The model employed a similar method to the hindered settling of flocculated material. This idea is based on our experimental results that the time growth curves of separated liquor zone showed a similar character to the settling curve of flocculated material, when the vertical axis reversed. In this model, it is also assumed that the gas phase and solid phase have the same movement, that is microbubbles and solid sludge particles joined to form aggregated floc. By comparing the numerical prediction with experimental data, the usefulness of the model is confirmed and some examples of flotation simulation are demonstrated.

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Wang, Di, Jinshan Lu, Junxiong Zhan, Zhiyong Liu, and Bin Xie. "Recent Advances in the Reutilization of Granite Waste in Various Fields." Journal of Material Science and Technology Research 8 (November 30, 2021): 30–40. http://dx.doi.org/10.31875/2410-4701.2021.08.5.

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Quarrying and processing of granite produce large amounts of waste residues. Besides being a loss of resources, improper disposal of these wastes results in pollution of the soil, water and air around the dumpsites. The main components of granite waste are quartz, feldspars and a small amount of biotite. Due to its hard and dense texture, high strength, corrosion resistance and wear resistance, granite waste may be recycled into building materials, composite materials and fine ceramics, effectively improving their mechanical properties and durability. By using the flotation process, high value-added products such as potash feldspar and albite may be retrieved from granite waste. Also, granite waste has the potential for application in soil remediation and sewage treatment. This review presents recent advances in granite waste reutilization, and points out the problems associated with its use, and the related countermeasures, indicating the scale of high value-added reutilization of granite waste.

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Mehta, Neha, Giovanna Dino, Iride Passarella, Franco Ajmone-Marsan, Piergiorgio Rossetti, and Domenico De Luca. "Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy." Sustainability 12, no. 6 (March 21, 2020): 2471. http://dx.doi.org/10.3390/su12062471.

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Supply of resources, a growing population, and environmental pollution are some of the main challenges facing the contemporary world. The rapid development of mining activities has produced huge amounts of waste. This waste, found in abandoned mine sites, provides the potential opportunity of extracting raw material. The current study, therefore, focuses on testing the validation of a shared methodology to recover extractive waste from abandoned mines, and applies this methodology to a case study in Gorno, northwest Italy. The methods focused on: (1) analyzing the impact of tailings and fine fraction of waste rock (<2 mm) on plants (Cress - Lepidium Sativum) to assess usability of both as soil additive, and (2) recovering raw materials from tailings and coarse fraction (>2 mm) of waste rock, by means of dressing methods like wet shaking table and froth flotation. The results indicated that the fine fraction of waste rock and tailings did not have detrimental effects on seed germination; however, there was marked decrease in plant growth. As for the recovery of raw materials, the coarse waste rock samples, crushed to <0.5 mm, produced a recovery of Cd, Ga, and Zn—as much as 66%, 56%, and 64%, respectively—using the wet shaking table. The same samples when crushed to 0.063–0.16 mm and used for froth flotation produced a recovery of Cd, Ga, and Zn of up to 61%, 72%, and 47%, respectively. The flotation experiment on tailings showed a recovery of Cd, Ga and Zn at pH 7 of 33%, 6% and 29% respectively. The present investigation highlights the methodologies used for extracting raw materials from extractive waste.

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Suhasini, R., Ashish Kumar Mallick, N. Vasumathi, T. V. Vijaya Kumar, S. Subba Rao, S. Prabhakar, G. Bhaskar Raju, and S. Shiva Kumar. "Evaluation of Flotation Collectors in Developing Zero Waste Technology for Processing Iron Ore Tailings." International Journal of Engineering Research 4, no. 11 (November 1, 2015): 604–8. http://dx.doi.org/10.17950/ijer/v4s11/1106.

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47

Bolto, Brian A., David R. Dixon, Stephen R. Gray, Chee Ha, Peter J. Harbour, Ngoc Le, and Antony J. Ware. "The use of soluble organic polymers in waste treatment." Water Science and Technology 34, no. 9 (November 1, 1996): 117–24. http://dx.doi.org/10.2166/wst.1996.0191.

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Organic polymeric flocculants have been used in water purification for several decades as coagulant aids or floc builders, after the addition of inorganic coagulants like alum, iron salts or lime. The increased use of cationic polyelectrolytes as primary coagulants instead of inorganic salts, which has occurred in recent times, arises from their significant inherent advantages. The main ones are faster processing, a lower content of insoluble solids to handle, whether by sedimentation, filtration, flotation or in biological conversion, and a much smaller sludge volume. Polymers have often been used in chemically assisted sedimentation of sewage solids to enhance the removal of suspended matter. The concept is applicable as well to the primary coagulation of industrial wastewaters where the separation may be based on flotation, as in examples from the leather, steel, wool scouring, cosmetic, detergent, plastics, dyehouse, paper, food processing and brewing industries. A cationic polymer of particular charge density is optimal, and hydrophobically modified polymers have relevance in the case of oil and grease removal. The burden of solids which must be floated is much reduced relative to systems utilising inorganic coagulants, and the dosage of chemicals overall is lower. In some cases the addition of some inorganic coagulant is unavoidable, as in the case of highly coloured effluents; in others, an anionic surfactant is needed to facilitate flotation.

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Muszyńska, Ewa, and Ewa Hanus-Fajerska. "Evaluation of Scabiosa ochroleuca L. vitality after introduction on post-flotation wastes." Ochrona Srodowiska i Zasobów Naturalnych 27, no. 1 (March 1, 2016): 37–41. http://dx.doi.org/10.1515/oszn-2016-0001.

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AbstractThe aim of this study was to evaluate the Scabiosa ochroleuca suitability for growth on heavy metals contaminated substrate obtained as a result of Zn–Pb ores exploitation and their processing. Three variants of cultivation were tested in vegetative hall conditions: post-flotation wastes (control), wastes enriched with either mineral fertilisation or with sewage sludge. The possibility of future direct use of the studied species on post-flotation settling pond was determined on the basis of biometric measurements and analysis efficiency of photosynthetic apparatus, that is, pigments content and chlorophyll a fluorescence. The results showed that untreated wastes negatively influenced on plants morphological and physiological status. On the contrary, the application of sewage sludge improved growth and development of cream scabious. Thus, not only the selection of proper plant material, tolerant to toxic levels of heavy metals and other hostile conditions, but also the waste treatment are crucial when metalliferous areas are to be reclaimed.

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Djurić, I., I. Mihajlović, D. Bogdanović, and Ž. Živković. "Modelling the process of kaolinite leaching from a copper mine flotation waste." Clay Minerals 45, no. 1 (March 2010): 107–14. http://dx.doi.org/10.1180/claymin.2010.045.1.107.

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AbstractThis paper presents the results of acidic leaching of kaolinite from the flotation waste of the RTB Bor copper mine, Serbia. The kaolinitic concentrate from the flotation waste contains 32% Al2O3. Kinetic investigations were conducted on the leaching of kaolinite roasted at 750°C for 60 min under air using H2SO4, HNO3 and HCl. Activation energies for the process were 74, 63 and 63.2 kJ mol–1 for sulphuric, nitric and hydrochloric acids, respectively. The kinetic function D3: [1 – (1 – α)1/3]2 = kt was chosen to describe the fractional conversion dependence on time and temperature. This enabled effective management of the leaching process to be carried out.

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Fečko, Peter, Jaroslav Zima, and Zdeňka Wittlingerová. "Agricultural Residues from Pyrolysis and their application in Flotation / Zemědělské Odpady Po Pyrolýze A Jejich Aplikace Ve Flotaci." GeoScience Engineering 57, no. 3 (September 1, 2011): 1–13. http://dx.doi.org/10.2478/gse-2014-0025.

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Abstrakt The paper deals with verification of floatability of a classical collector Montanol 551 and pyrolysis oils that were formed through pyrolysis of agricultural residues from basic industry and used in the flotation of black coal. The results imply that it is possible to produce collectors also from waste agricultural products, which may be applicable in the flotation of black coal.

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Journal articles on the topic 'Flotation waste'

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