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Letteratura scientifica selezionata sul tema "PICKLING SLUDGE"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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Articoli di riviste sul tema "PICKLING SLUDGE"

Fang, Bin Bin, Zhen Chu, Yang Yang, Xiu Yun Sun, Wen Ping Huang, Xing Fu Li e Lian Jun Wang. "Characterization of Stainless Steel and Wire Rope Pickling Sludge". Advanced Materials Research 726-731 (agosto 2013): 2130–34. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2130.

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With the development of Chinese industry, stainless steel and wire rope pickling sludge pollution problems have become increasingly prominent. Pickling sludge contains a large number of residual acid and heavy metals, and it is hazardous waste which would pose potential environmental problems and threaten people's health if being deposited outdoors or landfill simply. In view of Jiangsu Province present situation of pickling sludge, the paper analyzes the physical properties and the elements content of sludge from 9 enterprises. Pickling sludge pH is basically alkaline and range 7 to 9, moisture content is basically about 50% to 60%. ICP-AES has been applied to identify the content of metals. The range of Fe content is from 13.23% to 35.56% and the range of Ca content is from 1.04% to 29.93%, which shows that pickling sludge is appropriated for resource utilization. Ni and Cr are mainly contained in pickling sludge of stainless steel, the content are 1.79%~3.2% and 2.22%~3.15%, while Pb and Zn are mainly contained in pickling sludge of wire rope, the content are 0.0034%~0.53% and 3.14%~10.18%. The Elemental Analyzer has been applied to determine the content of F, Cl, N, S and P in picking sludge. The paper aims to provide a theoretical basis for making the huge amounts of the sludge harmless and how to utilize the treated sludge.

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Aciu, Claudiu, Daniela Lucia Manea e Dana-Adriana Iluţiu-Varvara. "Study Regarding the Micro Filler Effect of Sludge Resulting from Steel Pickling". Metals 11, n. 2 (21 febbraio 2021): 361. http://dx.doi.org/10.3390/met11020361.

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The management of waste, resulting in high amounts from different production processes, often raises special problems. This is also the case for sludge, generated in increasing amounts from the chemical pickling of steel pipes. This article presents the results of laboratory experiments regarding the micro filler effect of sludge generated by chemical pickling of steel pipes and analyzes its capacity to be a pozzolanic material. The study involved the performance of mechanical tests (specific surface of the powder; compressive mechanical strengths) and chemical tests (determination of the general chemical composition of cement and sludge using the X-ray fluorescence (XRF) method; determination of oxides in the chemical composition of sludge by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES); X-ray diffraction (XRD) analysis of the sludge and cement used). This topic was addressed because recycling of sludge, by using it for the manufacture of new building materials, takes advantage of the waste resulting from the pickling of steel pipes that-until now-has generated large volumes without a specific use.

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Li, Xiao Ming, Shang Jie Wang, Jun Xue Zhao, Ya Ru Cui e Su Bo Hou. "A Review on the Treatments and Minimization Techniques of Stainless Steel Pickling Sludge". Advanced Materials Research 194-196 (febbraio 2011): 2072–76. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2072.

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Pickling sludge is the deposits that generated from the neutralization of pickling waste water with calcium hydroxide in stainless steel pickling process. The main composition of pickling sludge is CaF2, CaSO4, Me(OH)n (M:Fe,Cr,Ni). Solidification /stabilization method is believed to a most economical way to dispose these wastes at present. But the process caused serious compatibilization, it not only took up the scarce land resource, but also wasted nickel, chromium and other resources, in addition, the potential harm of Cr6+ to the environment still existed. A new thought to recycle the sludge was as following. After drying the sludge, it contained mainly calcium fluoride and metal oxides. The calcium fluoride could replace fluorspar, so the sludge could be used as a raw material for AOD process, where the metal oxides were reduced into the bulk of the metal. This would not only save fluorite, but also could reduce metal oxide of sludge. With more stringent environmental demands and increasingly output of the sludge, the most effective way to reduce the sludge from source is recycling the valuable elements from waste water directly. Solvent extraction combined with vacuum evaporation, spray evaporation and resin absorption coordination were all the effective methods. The resin adsorption process would be another promising method as ion exchange resin was continuously successfully developed. It had been found that treating the waste water with positive resin can remove the metal ions, but how to completely resolve the metal from the resin was still a problem.

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Tang, Zhaohui, Xueyong Ding, Xinlin Yan, Yue Dong e Chenghong Liu. "Recovery of Iron, Chromium, and Nickel from Pickling Sludge Using Smelting Reduction". Metals 8, n. 11 (13 novembre 2018): 936. http://dx.doi.org/10.3390/met8110936.

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This paper reports the recoveries of iron, chromium, and nickel from pickling sludge using coal-based smelting reduction. The influences of slag basicity (CaO/SiO2, which is controlled by high phosphorus oolitic hematite iron ores), reduction temperature, reduction time, and the C/O mole ratio on the recoveries of Fe, Cr, and Ni are investigated systematically. The experimental results show that high recoveries of Fe (98.91%), Cr (98.46%), and Ni (99.44%) are produced from pickling sludge with optimized parameters for the smelting reduction process. The optimized parameters are a slag basicity of 1.5; a reduction temperature of 1550 °C, a reduction time of 90 min, and a C/O mole ratio of 2.0. These parameters can be used as technical support for the recycling of pickling sludge with pyrometallurgy.

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Fang, Bin Bin, Yang Yang, Zhen Chu, Xiu Yun Sun, Wen Ping Huang, Xing Wei Song e Lian Jun Wang. "The Generation and Analysis of Carbon Steel Pickling Sludge". Applied Mechanics and Materials 368-370 (agosto 2013): 505–9. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.505.

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The sludge generated from carbon steel pickling process, containing a large number of metal ions, particularly hexavalent chromium, mercury, lead and nickel ion, which is considered to be a kind of hazardous solid waste. The content of moisture in the sludge is 40.02% to 97.30% ,and pH value is about 7 to 11 ;The content of iron in the sludge is the highest, which is from 14.21% to 50.12% ; Other conventional metal elements like Ca , K, Na and Mg ,their content as follows: 5.93% to 29.93% , 0.011 % to 0.14% , 0 to 0.33% and 0.11% to 1.65 % . The heavy metal elements like Zn, Ni, Mn, Cr, Cu, Hg and Pb, their content as follows: 0.0094% to 4.83%, 0.0063% to 1.129% , 0.0226% to 0.106, 0.0103 % to 0.0647% , 0.0034% to 0.0657% , 0.0017% to 0.0135% and 0.0012% to 0.0038% . The anions like SO42- , Cl- and PO43-, their contents are 0.18 % to 31.92%, 0.05 % to 4.27%, 16% to 11.61%, respectively. This paper has a certain reference value for the treatment and utilization of carbon steel pickling sludge. This paper has certain reference value when treating and utilizing the plain carbon steel pickling sludge.

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Liang, Dongxu, Manhong Ji, Suiyi Zhu, Yu Chen, Zhihua Wang, Yanwen Liu, Asghar Khan, Kyonghun Ri, Hongbin Yu e Mingxin Huo. "A novel Fe recycling method from pickling wastewater producing a KFeS2 whisker for electroplating wastewater treatment". Environmental Science: Water Research & Technology 7, n. 8 (2021): 1480–91. http://dx.doi.org/10.1039/d1ew00085c.

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Li, Xiao-ming, Ming Lv, Wei-dong Yin, Jun-xue Zhao e Ya-ru Cui. "Desulfurization thermodynamics experiment of stainless steel pickling sludge". Journal of Iron and Steel Research International 26, n. 5 (19 luglio 2018): 519–28. http://dx.doi.org/10.1007/s42243-018-0113-4.

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Merentsov, N. A., S. A. Bokhan, V. N. Lebedev, A. V. Persidskiy e V. A. Balashov. "System for Centralised Collection, Recycling and Removal of Waste Pickling and Galvanic Solutions and Sludge". Materials Science Forum 927 (luglio 2018): 183–89. http://dx.doi.org/10.4028/www.scientific.net/msf.927.183.

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The article presents an approach to centralised collection, recycling and removal of waste pickling and galvanic solutions and sludge designed for small steel making plants and workshops having the described processes and using flow-through filter blocks.

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Junxue, Zhao, Zhao Zhongyu, Shi Ruimeng, Li Xiaoming e Cui Yaru. "Issues Relevant to Recycling of Stainless-Steel Pickling Sludge". JOM 70, n. 12 (9 ottobre 2018): 2825–36. http://dx.doi.org/10.1007/s11837-018-3168-6.

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Yang, Cong-cong, Jian Pan, De-qing Zhu, Zheng-qi Guo e Xiao-ming Li. "Pyrometallurgical recycling of stainless steel pickling sludge: a review". Journal of Iron and Steel Research International 26, n. 6 (14 maggio 2019): 547–57. http://dx.doi.org/10.1007/s42243-019-00278-y.

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Più fonti

Tesi sul tema "PICKLING SLUDGE"

Ma, Ping. "Experimental studies on treatment and recycling of pickling sludge generated in stainless steel production". Licentiate thesis, Luleå tekniska universitet, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18242.

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Pickling sludge generated in the stainless steel industries contains large amounts of calcium fluoride and water and relatively small amounts of metals. Therefore, such sludge is difficult to be directly recycled back to the EAF process and would be harmful to the environment if deposited as landfill for a long term. The main objective of the present thesis work is to find out proper ways to treat the pickling sludge and to recover useful metals from it. For this, characterisations, solid-state reduction and smelting reduction tests on the pickling sludge were carried out in the laboratory. Likewise, comparison studies on solid-state reduction of pure metal oxides with graphite and on pickling sludge with p-coke were conducted using TGA. In addition, the off-gas generated by smelting reduction of pickling sludge was monitored by measurements with a mass spectrometer. Through the present thesis study it can be concluded that it is possible to treat and recycle pickling sludge by using both solid-state reduction and smelting reduction methods. In order to completely separate the reduced metals from the sludge, the smelting reduction method would be preferred.
Godkänd; 2001; 20070313 (ysko)

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Ma, Ping. "Experimental and theoretical studies on treatment and recycling of pickling sludge generated in stainless steel production /". Luleå, 2004. http://epubl.luth.se/1402-1544/2004/54.

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Dahlgren, Lena. "Treatment of Spent Pickling Acid from Stainless Steel Production : A review of regeneration technologies with focus on the neutralisation process for implementation in Chinese industry". Thesis, KTH, Industriell ekologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-57907.

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Pickling is a unit operation within stainless steel production, which means treating the steel with hydrofluoric acid (HF) and nitric acid (HNO3), also called mixed acid. The whole process generates waste water streams which have to be treated before released to recipient. The aim of this degree thesis was to make an evaluation of different possibilities for reduction of emissions from the pickling process with China as a possible future market. The work consisted of two different parts; the first was to describe and evaluate different treatment methods for waste pickling acid, with emphasis on denitrification technologies. The second and main part was to make a fundamental description of the neutralisation process and outline important parameters. The work was performed by gathering information from literature but also from industry in both Sweden and China. The work has been a collaboration between the Royal Institute of Technology (KTH), the Swedish Environmental Institute (IVL) and the company Scanacon. A review of the different acid recovery methods; ionic exchange, diffusion dialysis and extraction was made. The study showed that ionic exchange is a robust method with relatively low cost and therefore it has been largely implemented both in Swedish and Chinese industry. The outflow however still requires neutralisation. Nitrate reduction can be performed as “end of pipe”, those methods investigated in this study were; biological treatment, reverse osmosis and nanofiltration. Meanwhile, internal solutions such as evaporation and electro-dialysis are two interesting technologies which reduce nitrates in combination with acid recovery. It was found that slaked lime (Ca(OH)2) is the most suitable neutralisation agent for pickling waste and, besides the choice of chemicals, many important parameters influence the process, such as the optimal pH, mixing and conditions during lime slaking. Based on information from one of the visited sites in Sweden a mass balance of the neutralisation facility was made and from that the required amount of Ca(OH)2 was calculated. The calculations were verified by an experimental part performed by IVL, using pickling acids from the same site. The amount of metals in the outgoing water was calculated using software “Medusa” but also by equilibrium equations. However, the results differed somewhat; this is probably due to the fact that Medusa takes other complexes and their interaction, besides the formed metal hydroxides, into consideration. Within the mining industry research has been made on different methods for neutralisation and some have been tested in field. An example is the High Density Sludge process (HDS), were an amount of sludge is recycled back to the neutralisation tank. It was shown that this gave improved sludge properties and decreased lime consumption. This could perhaps also be implemented for waste water in the stainless steel industry, and the method was also tested during the experimental part of this project. The dry content increased after a number of cycles but further investigation is required before any conclusion can be drawn.
Betning är en enhetsprocess inom tillverkningen av rostfritt stål då godset behandlas med fluorväte syra (HF) och salpetersyra (HNO3), också kallad blandsyra. Betningen ger upphov till vatten strömmar som måste behandlas innan de släpps ut till recipienten. Syftet med det här examensarbetet var att göra en utvärdering av olika tekniker för att reducera utsläpp till vatten från betningen med Kina som potentiell framtida marknad. Arbetet bestod av två delar; den första delen var att beskriva och utvärdera olika behandlingsmetoder av förbrukade betbad med betoning på denitrifikationstekniker. Den andra och största delen var att göra en grundläggande beskrivning av neutralisationsprocessen. Studien utfördes genom att inhämta information från litteratur samt från industrin i både Sverige och Kina. Arbetet har varit ett samarbetsprojekt mellan Kungliga Tekniska Högskolan (KTH), Svenska miljöinstitutet (IVL) och företaget Scanacon. Arbetet behandlar syraåtervinningsystemen; jonbytare, diffusions dialys samt extraktion. Nitrat reduktion kan ske internt eller externt där de externa åtgärder som behandlas i denna rapport är biologisk rening, omvänd osmos och nanofiltrering. De interna metoderna avdunstning och elektrodialys är intressanta eftersom de återvinner syran samtidigt som de reducerar nitraterna avsevärt. Studien visade att jonbyte, på grund av dess robusthet och relativt låga kostnad är den mest implementerade metoden för syraåtervinning i både svensk och kinesisk industri idag. Restprodukten från jonbytaren kräver dock fortsatt behandling, där det traditionella valet är neutralisation. Studien visade att släckt kalk (Ca(OH)2) är det mest passande kemikalien för neutralisation av betsyror. Förutom kemikalieval så finns det många parametrar som påverkar effektiviteten hos processen så som pH, omrörning och förhållanden under kalksläckningen. Baserat på information ifrån ett av de besökta stålverken i Sverige, gjordes en massbalans över dess neutralisationanläggning. Utifrån de flöden som denna gav kunde den teoretiska mängden kalk som krävdes för utfällning räknas ut. Beräkningarna verifierades med en experimentell del som utfördes av IVL på betsyror från samma verk. Resthalterna av metall i utgående vatten beräknades med programmet ”Medusa” men också med jämviktsekvationer. Resultaten mellan de två skiljde sig, detta beror förmodligen på att Medusa förutom hydroxidutfällning tar hänsyn till andra utfällningskomplex och dess interaktioner. Inom gruvvatten industrin har det forskats en del kring olika neutralisationsmetoder, en i litteraturen föreslagen sådan är ”High Density Sludge process (HDS)”. Här återförs en del av slammet tillbaka till neutralisationssteget, vilket visade sig ge förbättrade slamegenskaper och minskad kalkåtgång. Det var intressant att undersöka om denna metod också gick att implementera på förbrukade betbad och därför prövades metoden i den experimentella delen av detta projekt. Detta gav efter ett antal återföringscykler högre torrhalt på slammet, dock krävs fortsatta undersökningar innan någon slutsats kan dras.

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許展瑞. "Study on Mechanism of Pyrolysis Pickling Sludge and Antirust Treatment of Spheroidized Iron". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5g3gm9.

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GARG, SAKSHI. "STUDY OF LEACHING CHARACTERISTICS OF STAINLESS STEEL PICKLING SLUDGE & ITS UTILIZATION WITH CONCRETE USING TAGUCHI METHODOLOGY". Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15341.

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Abstract (sommario):

Steel finishing operations such as pickling, galvanizing, plating, etc., involve a process of removing scale, rust and dust from the surface of stainless steel. In this, sheets of steel are immersed in hot acidic solution resulting in waste liquor which contains heavy metals like Fe, Cr, Ni, etc. When treated with lime, these heavy metals get settled as metal hydroxides in form of sludge. As per the Act of Hazardous Waste (Management and Handling) Rules, 1989, the disposal of lime treated spent pickling sludge should be done with consideration and is not easy. In normal practice, this sludge is being stored in leak proof bags and no proper disposal technique is being employed by small and medium industries. An attempt has therefore been made to utilize the lime treated pickling sludge in cement concrete mix in the presence of fly-ash as a binder agent. The main objective is to immobilize heavy metals in the concrete matrix and studying its leaching characteristics and compressive strength. Sludge is characterized for the heavy metal content using AAS, EDX and XRD. Other physical and chemical properties are also analysed. Test cubes of nominal mix M20 were prepared and these were tested for its 7 and 28 days compressive strength. Toxicity characteristics leaching procedure (TCLP) test as per USEPA was carried out on these cubes to study the extent of immobilization and stabilization of heavy metals in the concrete matrix. For this, Four factors were varied on three levels i.e. Percentage of cement replaced by sludge (5%, 7.5% & 10%) and Percentage of fly-ash (0%, 15% & 20%), type of cement used and particle size grading of sludge, to assess the effect of these factors on compressive strength and heavy metal concentrations in leachate. Taguchi methodology (L9 orthogonal array) was used for optimizing the design of experiments and for further analysis. Experimental results show that the lime treated pickling sludge can be utilized with cement/concrete with some binding materials like fly-ash. By Analysis of Mean (ANOM) method, it was found that 7.5% addition of sludge and 20% fly-ash as partial replacement of cement with 43 grade OPC and sludge particle size ranging between 0.3 to 2.36mm produced the optimal performance for compressive strength and heavy metal immobilization values of the cement-sludge-flyash concrete cubes. By Analysis of Variance (ANOVA) method, it was found that particle size grading of sludge and percent of sludge added as cement replacement contributed 46% and 41% respectively to the optimal performance. Formation of C2H, C3H and gypsum (C-S-H gel) may be contributing in the better performance of concrete.

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Capitoli di libri sul tema "PICKLING SLUDGE"

Li, Guanghui, Jun Luo, Mingjun Rao, Zhiwei Peng e Tao Jiang. "Recycling of Stainless-Steel Pickling Sludge via RKEF Route". In Advances and Innovations in Ferronickel-Making, 299–311. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5227-2_6.

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Liu, Xulong, Jing Zhang, Qing Xiao e Qiuju Li. "Experimental Study on Reduction-Magnetic Separation Process of Pickling Sludge". In EPD Congress 2014, 91–98. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118889664.ch11.

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Li, Guanghui, Jian Wang, Jing Chen, Jing-xiang You, Tao Zhang, Jiao-yang Duan, Qing Ye, Zhiwei Peng, Mingjun Rao e Tao Jiang. "Preparing Cuspidine Glass-Ceramics from Iron-Removed Stainless Steel Pickling Sludge". In 11th International Symposium on High-Temperature Metallurgical Processing, 953–61. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36540-0_85.

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Ya-hui, Feng, Sun ying, Zhang jing e Li Qiu-ju. "Experimental Study on Reduction in Low Grade Lateritic Nickel Ore Mixed with Pickling Sludge". In Energy Technology 2015, 217–26. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093220.ch24.

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Ya-hui, Feng, Sun ying, Zhang jing e Li Qiu-ju. "Experimental Study on Reduction in Low Grade Lateritic Nickel Ore Mixed with Pickling Sludge". In Energy Technology 2015, 219–26. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48220-0_24.

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Atti di convegni sul tema "PICKLING SLUDGE"

Gupta, Rajiv, Anupam singhal, Anuradha devi e Sanjay Kumar Verma. "A Study on Application of Pickling Sludge in Pavements Tiles". In THe 3RD INTERNATIONAL CONFERENCE ON RECENT TRENDS IN ENVIRONMENTAL SCIENCE AND ENGINEERING (RTESE'19). Avestia Publishing, 2019. http://dx.doi.org/10.11159/rtese19.108.

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Devi, Anuradha, Dr Anupam Singhal, Dr S. K. Verma, Dr Rajiv Gupta, A. N. Singh, Dr Prasad Panzade e Martina Fernandes. "Utilization of Copper Tailing and Pickling Sludge for Improving the Fertility of Soil". In Annual International Conference on Advances in Biotechnology. Global Science & Technology Forum (GSTF), 2014. http://dx.doi.org/10.5176/2251-2489_biotech14.03.

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Zhou, Cailing, Shifu Ge, Hui Yu e Tianqi Zhang. "Study on Removal and Solidified Characteristics of Heavy Metals in the Slag from High Temperature Smelting of Copper Sludge, Electroplating and Pickling Sludge". In 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/iceesd-17.2017.176.

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Rajamani, Sengoda Gounder. "Innovative ecological processes with recovery of chemicals and water for reuse in leather sector - an economical and sustainable approach". In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.iii.15.

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The effluent discharged from conventional process in textile dyeing and tanneries are unable to meet some of the discharge parameters such as Total Dissolved Solids (TDS) in the existing physiochemical & biological treatment units. In addition to TDS management the control of volatile solids in hazardous category sludge is also becoming a necessity. To overcome these challenges faced by tanneries in the world leather, improved cleaner production, segregation of saline soak liquor and separate treatment, modified chrome recovery system and recovery of chromium & sodium chloride salt in the form of powder and quality water with TDS less than 500mg/l for reuse by tanneries have been developed for field application. Physiochemical treatment is converted into total biological treatment with sulphide oxidation using enzyme and biomass which resulted in 50% reduction in sludge generation. The secondary treated effluent and supernatant from chrome recovery system are processed with membrane units for recovery of high saline stream and quality salt for reuse in pickling process and other industrial requirement. These developments are being implemented at field level for cluster of nearly 400 tanneries in India which is first of its kind in the world.

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