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Journal articles on the topic 'Low-grade phosphorite'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Temirov, Uktam, Nodir Doniyarov, Bakhrom Jurakulov, Najimuddin Usanbaev, Ilkhom Tagayev, and Abdurasul Mamataliyev. "Obtaining complex fertilizers based on low-grade phosphorites." E3S Web of Conferences 264 (2021): 04009. http://dx.doi.org/10.1051/e3sconf/202126404009.

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In the study, the process preparation of phosphorus-humus fertilizers based on low-grade Central Kizilkum phosphorites activated using sulfuric acid in the ratio of 30-70% for decomposition of CaCO3 in the phosphorite followed by addition of activated sludge from municipal waster water was investigated.

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2

Guha, Arindam, Yasushi Yamaguchi, Snehamoy Chatterjee, Komal Rani, and Kumranchat Vinod Kumar. "Emittance Spectroscopy and Broadband Thermal Remote Sensing Applied to Phosphorite and Its Utility in Geoexploration: A Study in the Parts of Rajasthan, India." Remote Sensing 11, no. 9 (2019): 1003. http://dx.doi.org/10.3390/rs11091003.

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The contrast in the emissivity spectra of phosphorite and associated carbonate rock can be used as a guide to delineate phosphorite within dolomite. The thermal emissivity spectrum of phosphorite is characterized by a strong doublet emissivity feature with their absorption minima at 9 µm and 9.5 µm; whereas, host rock dolomite has relatively subdued emissivity minima at ~9 µm. Using the contrast in the emissivity spectra of phosphorite and dolomite, data obtained by the thermal bands of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) sensor were processed to delineate ph

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3

Wang, Wei Zhi, Miao Miao Han, and Chun Guang Yang. "Study on Flotation Process Reclaiming Associated Phosphor from Magnetic Tailing." Advanced Materials Research 549 (July 2012): 482–86. http://dx.doi.org/10.4028/www.scientific.net/amr.549.482.

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To make the best use of the mineral resource, the flotation tests were conducted on the magnetic tailings from a low grade vanadium -titanium magnetite ore, reclaiming phosphorites, By having done the conditional tests, the factors which worked on the flotation were researched. The results showed that for the tailings whose P2O5 grade was 3.05% worked by one roughing, three cleanings, one scavenging and the middlings returned in turn, the concentrate whose P2O5 grade was 33.50%,recovery was 92.18% was obtained, and the phosphorite was reclaimed availably.

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4

Xing, Yu, Hong Gao, Yuan Fang Ying, and De Zheng Qu. "Mechanochemical Activation and Characterization of Low-Medium Grade Phosphorite Ore." Advanced Materials Research 690-693 (May 2013): 3529–32. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3529.

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The activation effect of ball-to-powder ratio and activation time on phosphorite ore that takes place in mechanochemical activation has been investigated in present paper, which is carried out in a planetary mill AGO-II. The results show that, particle sizes decreased after activation; the leaching rate of water-soluble P2O5 increased 4.6 percentage as ball-to-powder ratio rose from 8:1 to 40:1; the activated particle of samples has been highly dispersed, while the leaching rate of water-soluble P2O5 reached 10.1% after milling 15 minutes during activation, which was 4 times as high as the un-

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5

Gruber, G. A., J. D. Raulerson, and R. P. Farias. "Adapting technology to beneficiate a low-grade phosphorite ore." Mining, Metallurgy & Exploration 4, no. 1 (1987): 14–18. http://dx.doi.org/10.1007/bf03402666.

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6

Alimov, Umarbek, Shafoat Namazov та Akhmed Reymov. "Сomposition and Rheological Properties of Decomposition Products of Low Grade Phosphorite with Phosphoric Acid". Chemical Science International Journal 24, № 1 (2018): 1–11. http://dx.doi.org/10.9734/csji/2018/25653.

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7

Vetsner, Yulana, Valentyn Kazakov, Vira Doronina, et al. "To the question of using of low-grade phosphate rock from Synycheno-Yaremivske field of the Iziumskyi district." IOP Conference Series: Earth and Environmental Science 970, no. 1 (2022): 012016. http://dx.doi.org/10.1088/1755-1315/970/1/012016.

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Abstract The article is devoted to the study of low-grade phosphorites of the Synycheno-Yaremivske deposit in the Iziumskyi district of the Kharkiv region. The possibility of enrichment of this ore by three methods is considered: mechanical, thermal and chemical, carried out in laboratory conditions. The qualitative and quantitative composition of phosphorite has been determined using X-ray fluorescence analysis and electron microscopy with an attachment for energy dispersive analysis. Both natural and enriched raw materials have been studied. Based on the data obtained, it is possible to conc

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8

Zhantasov, K. T., Sh Moldabekov, M. K. Zhantasov, et al. "Mechanical Activation of the Phosphorites (Karatau Pool) by using Organic-Mineral Co-Activators for Multicomponent Mineral Fertilizers." Eurasian Chemico-Technological Journal 17, no. 4 (2016): 317. http://dx.doi.org/10.18321/ectj276.

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Deficiency of mineral fertilizers in the agricultural sector for last 15–20 years has decreased. Therefore with the purpose of partial reduction of this deficiency it was developed a new polycomponent NPK fertilizer, which contains humate and vermiculite. The given fertilizer has been produced from the natural South<br />Kazakhstan raw materials in accordance with an acid-free way. The given article contains the data and physicochemical properties of initial materials prepared on the basis of phosphorite fines of Zhanatas and Chulaktau deposits and sinter return. Characteristics of vermi

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Raiymbekov, Y. B., P. A. Abdurazova та U. B. Nazarbek. "Төменсұрыпты фосфат шикізатын органикалық қышқылмен байытудың термодинамикалық талдауы". Горный журнал Казахстана, № 5(2017) (13 червня 2023): 32–48. http://dx.doi.org/10.48498/minmag.2023.2017.5.005.

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The phosphorus industry faces the challenge of developing low-grade phosphate reserves for industrial purposes, requiring technological solutions for enrichment. About 20 million tons of low-grade phosphorites are currently unsuitable for processing. Depleting phosphorite deposits and low phosphorus anhydride levels reduce global demand for domestic ore and necessitate research on enrichment and integrated use. This study aims to conduct a thermodynamic analysis of low-grade phosphate enrichment using acetic acid. Using the HSC Chemistry 9.3 program, developed by Finnish metallurgical company

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10

Tashkenbay, Bautdinov, Reymov Akhmed, and Tadjiev Sayfuddin. "Chemical Activation of Khojakul Phosphorites by Ammonium Salts." Chemical Science International Journal 19, no. 2 (2017): 1–6. https://doi.org/10.9734/CSIJ/2017/30755.

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<strong>Aims: </strong>To investigate chemical activation of low-grade phosphorite from Karakalpakstan, Khojakul by ammonium salts in order to obtain slow-acting phosphate fertilizers. <strong>Study Design:</strong> The content of the total form N (N<sub>t.</sub>) was determined by method Kjeldahl method. Determination of total and acceptable forms (on 0.2 M solution of Trilon B) of phosphorus (P<sub>2</sub>O<sub>5tot</sub>., P<sub>2</sub>O<sub>5wat</sub>.) was performed widely in the analysis of phosphate ores by differential method on photo colour meter PCM-3 (made in Russia, l = 440 nm) as

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11

Ruziboev, S., A. Mukhumov, Y. Usmanov, and Sh Babakhulov. "Optimal organization of dry lands in case study of Uzbekistan." E3S Web of Conferences 401 (2023): 04010. http://dx.doi.org/10.1051/e3sconf/202340104010.

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The article showed that the internal land development projects, which include the organization of the territory, along with other measures, will give certain positive results in the rational organization of the use of dry land. Land planning projects developed based on land assessment data create an opportunity to optimize areas of arid lands and crops and justify the economic and technical-organizational aspects of the effective organization of agricultural production in these areas. The results of the conducted scientific research confirmed that in organizing the use of dry arable land in th

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12

Li, Cheng Xiu, Ren Ju Cheng, and Hui Hua Luo. "Study on Collector for Reverse Flotation of Certain Phosphorite in Guizhou." Advanced Materials Research 734-737 (August 2013): 1086–92. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.1086.

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On the basis of the contrastive research into the flotation performance of several vegetable oil fatty acids, the rapeseed oil fatty acid with better performance was screened out from many fatty acids, and its linolenic acid C18:3content is15.81%, then through modifying and compounding, new magnesium removal collector EM-LS-01was obtained. With the use of this agent in certain low-grade high-Mg phosphorite, the phosphate concentrate indexes of single reverse flotation are grade of 30.25% P2O5, recovery of 90.63% and content of 0.99% MgO.

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13

Onuigbo, Evangeline Njideka, Anthony Uwaoma Okoro, and Stella ‘Nwaife’ Chibuzor. "Geochemistry and paleoenvironment of the phosphorites from the Ameki Formation, Niger delta, Nigeria." Global Journal of Geological Sciences 18 (June 25, 2020): 1–14. http://dx.doi.org/10.4314/gjgs.v18i1.1.

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The phosphorites of the Ameki Formation occur as nodules, pellets as well as primary phosphatic shales and siltstones. Geochemical analysis of the phosphate samples was carried out to determine its chemical composition as well as its depositional environment. The methodology applied include XRF, INAA, XRD and thin section petrography using Polarizing Microscope. The XRF result identified CaO- P2O5- F as the major mineral group, SiO2, Al2O3, Fe2O3, MgO and TiO2, which show minor occurrences and Cr, U, Pb, V, Cu, Zn, Se and Cd that occur in trace amounts. The nodules and pellets are of medium to

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14

Nurmurodov, T., A. Reymov, M. Turaev, S. Tursunova, M. Axtamova, and M. Ayimbetov. "Thermal phosphate fertilizers from low grade central Kyzylkum’s phosphorite in the lab model unit." NEW UNIVERSITY: TECHNICAL SCIENCES, no. 5-6 (June 30, 2014): 47–53. http://dx.doi.org/10.15350/2221-9552.2014.5-6.0007.

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15

Isamurodovich, Nurmurodov. "THERMAL PHOSPHATE FERTILIZERS FROM LOW GRADE CENTRAL KYZYLKUM’S PHOSPHORITE IN THE LAB MODEL UNIT." International Journal of Recent Advancement in Engineering & Research 4, no. 5 (2018): 21. http://dx.doi.org/10.24128/ijraer.2018.ab67op.

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16

Doniyarov, Nodirjon Abdihakimovich, and Ilkhom Ahrorovich Tagayev. "Obtaining a new kind of organic fertilizer on the basis of low-grade phosphorite of Central Kyzylkum." Materials and Geoenvironment 65, no. 3 (2018): 157–65. http://dx.doi.org/10.2478/rmzmag-2018-0016.

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Abstract The paper presents the results of processing low-grade phosphorites by microorganisms of activated sludge from the biochemical purification production unit of JSC “Navoiazot”. The obtained results on the leaching of rare and rare-earth elements into the liquid phase make it possible to separate them and thus enrich the phosphorites. Other options are the gravitational separation of the crushed calcite particles. In addition to this, there is a real possibility of creating complex organomineral fertilisers.

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17

Shamuratov, Sanjarbek, Umid Baltaev, Sanobar Achilova, Umarbek Alimov, Shafoat Namazov, and Najimuddin Usanbaev. "Enhancement of availability of high calcareous phosphorite by neutralization of acid effluent and composting of cattle manure." E3S Web of Conferences 377 (2023): 03004. http://dx.doi.org/10.1051/e3sconf/202337703004.

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In this article, the influence of acidic effluent (AE) neutralization process, the production of raw fatty acids of cotton soap stock, on the change in the applicability of phosphate powder (PP) and mineralized mass (MM), which are low-grade phosphorites of the Central Kyzylkum, has been studied. It was found that with wide changes in the mass ratios of AE : PP and AE: MM (from 100:10 to 100:40) at a temperature of 60 °C and a time duration of 30 min, the content of the relative assimilable forms of phosphorus in 2% citric acid are approximately from 1.95 to 1.63 and from 3.67 to 1.72 folds mo

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18

Yan, Fu Kun, Qing Fei Xiao, Xiong Tong, Chun Mei Luo, and Bo Li. "The Study of Grinding Phosphate Rock by the Contrast of Steel Balls and Iron Segments." Applied Mechanics and Materials 295-298 (February 2013): 3050–54. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.3050.

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The grinding process has been one of the most important part for mineral processing,combined with the basic principle of selective grinding and grinding medium application,a low grade phosphorite in Yunnan province which was grinded by the precise size and ratio of iron segments, and with the same specifications compared with low chrome steel balls under the same condition.The obtained results shown that iron segments could get a fine grinding with level(+0.10mm) 1.89 percentage points lower, pulverization level(-0.01mm) 0.07 percentage points lower,intermediate easy level(0.074～0.038mm) 9.29

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19

Gaft, M. "Application of Laser Induced Luminescence in Ecology." Water Science and Technology 27, no. 7-8 (1993): 547–56. http://dx.doi.org/10.2166/wst.1993.0594.

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Exhaustion of rich ore deposits is making it necessary to bring low-grade ores into production, resulting in a sharply increased volume of excavated rock. Huge quantities of waste fill vast areas of the Earth's surface, with severe ecological effects. But the ecological damage could be reduced by extracting additional products from the tailings. Laseroluminescent sorting is a new technology by which this may be achieved. The most promising subjects are about 50 minerals including diamonds, native Au and Ag, ores of V, Pb, Zn, Sn, Li, Be, W, Mo, Zr, Sr, halite, apatite, phosphorite, fluorite, c

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20

Tagayev, Ilhom, Nodirjon Doniyarov, Anvar Asrorov, and Islom Murodov. "The Role of Medium Condition for Uranium Separation from Central Kyzylkum’s Low-grade Phosphorite after Sulfuric Acid Treatment." International Journal on Advanced Science, Engineering and Information Technology 12, no. 2 (2022): 668. http://dx.doi.org/10.18517/ijaseit.12.2.14060.

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21

Tamm, Kadriann, Zeinab Arab Zadeh, Rein Kuusik, et al. "Effect of Flotation Time and Collector Dosage on Estonian Phosphorite Beneficiation." Minerals 11, no. 2 (2021): 114. http://dx.doi.org/10.3390/min11020114.

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Phosphorus is an essential and non-substitutable element for the cellular processes of all living organisms. The main source of phosphorus in the biosphere is phosphate rock. With more than 700 Mt phosphate rock, Estonia holds the largest sedimentary phosphate rock deposits in the European Union. Estonian phosphate rock is particularly outstanding due to its remarkably low content of hazardous heavy metals such as Cadmium (<5 ppm) and trace elements of Uranium (<50 ppm). It is also a reliable source of valuable elements such as rear earth elements (REEs). The aim of this study was to inv

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22

Shevko, Viktor M., Alexandra D. Badikova, Raisa A. Uteeva, Boris A. Lavrov, and Daniel D. Amanov. "Thermodynamics of a Karatau and Aktobe phosphorites mixture interaction when producing phosphorus, calcium carbide and ferrosilicon." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 1 (2024): 162–73. http://dx.doi.org/10.18799/24131830/2024/1/4184.

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Relevance. Associated with the need to increase the level of comprehensive use of phosphorites during their electrothermal processing and to reduce the amount of slag waste generated during the production of phosphorus and polluting the environment. Aim. To conduct computer thermodynamic modeling of the effect of temperature and amount of iron on technological parameters of interaction of a Karatau and Aktobe phosphorites mixture with carbon and iron to produce phosphorus, calcium carbide and ferrosilicon. Objects. Phosphorites of the Karatau and Aktobe phosphorite-bearing basins. Methods. The

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23

Uktamov, Dilmurod, and Mukhayyo Alieva. "Obtaining nitrophos fertilizers with copper, zinc, molybdenum." E3S Web of Conferences 390 (2023): 05034. http://dx.doi.org/10.1051/e3sconf/202339005034.

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The purpose of the research is to obtain micronutrient fertilizers by applying micronutrient salts and their complex forms to phosphorus fertilizers obtained in incomplete standards of nitric acid or their salt mixtures. Central Kyzylkum phosphorites (low-grade P2O5-12.38%, CaO-43.68%, CO2-13.48%, non-enriched P2O5-16.38%, CaO-45.93%, CO2-18, 15%, SO3-1.86%, thermoconcentrate P2O5-27.40%; CaO-54.68%; CO2- 4.52%) were decomposed with nitric acid at different rates and phosphorus fertilizers were obtained. Copper and zinc sulfate and ammonium molybdate (Cu, Zn, Mo) salts and their complex forms

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24

ZHANG, Jie, Yuan NI, and Jiatao LIANG. "Characteristics of mineralogical technology about medium-low grade bio-chip containing the rare earth dolomitic phosphorite in Xinhua, Zhijin, Guizhou." Journal of Rare Earths 28 (December 2010): 525–27. http://dx.doi.org/10.1016/s1002-0721(10)60333-x.

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25

Laajoki, Kauko. "Main Features of the Precambrian Banded Iron-Formations of Finland." Journal Geological Society of India 28, no. 2-3 (1986): 251–70. http://dx.doi.org/10.17491/jgsi/1986/280212.

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Abstract Precambrian banded (cherty) Iron-Formations are encountered in Finland in four main rock associations: 1) Late Archaean (c.2800 Ma) occurrences hosted either by greenstones or turbiditic schists in eastern and northern Finland. 2) Early Proterozoic (Lapponi) (&gt;2200 Ma) iron-formations associated closely with metavolcanics in Central Lapland. 3) Early Proterozoic (Karelia) (c. 2050 Ma) metasedlment-hosted occurrences in Kainuu. 4) Early Proterozoic (Svecofennia) (c. 1900 Ma) occurrences hosted either by metavolcanics or metasediments in southern and central Finland. The occurren

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26

Kang, Qinrong, Yuandi Xia, Minghan Shi, et al. "Evaluation of Rock Burst Propensity and Rock Burst Mechanism in Deep Phosphate Mines: A Case Study of Sujiapo Phosphate Mine, Hubei Province, China." Advances in Materials Science and Engineering 2022 (December 22, 2022): 1–13. http://dx.doi.org/10.1155/2022/7874016.

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Rockburst is one of the major problems in rock underground engineering and mechanics. To make a risk assessment of rockburst and improve the mine safety index, some evaluation systems for rockburst propensity have been proposed and applied, and progress has been made in the study of high-value mines and single evaluation systems, but these evaluation systems are still immature for deep low and medium grade phosphate mines with more complex influencing factors. Therefore, to solve this problem, this study takes the phosphate mining area of the Sujiapo phosphate mine as the main research object,

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27

Souza, Valmir. "MINERALOGIA E ASPECTOS GEOQUÍMICOS DOS LATERITOS FOSFÁTICOS DA ILHA PEDRA GRANDE DO GURUPI (PA)." Boletim do Museu de Geociências da Amazônia 9, no. 1 (2022): 1–57. http://dx.doi.org/10.31419/issn.2594-942x.v92022i1a7vss2.

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The Pedra Grande Island located at the mouth of the Gurupi River, is equivalent to a small plateau, which is currently partially drowned by the sea, where the impacts of the waves have already left longitudinal fractures and caves on the island. The island is entirely made up of lateritic rock, represented by the ferruginous lateritic crust, exhibiting a dominantly brownish red coloration. Texturally it consists of nodules, pisoliths and pseudo-fragments, which are surrounded by a whitish cream cement, giving the rock a general brechoid appearance, in addition to columnar and cavernous feature

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28

Anarbayev, A. A., N. A. Abdimutalip, G. S. Shalabayeva, and A. М. Beskempirova. "THE ECOLOGICAL IMPORTANCE OF PROCESSING PHOSPHATE RAW MATERIALS TO PRODUCE FINISHED PRODUCTS." Горный журнал Казахстана, no. 5(241) (June 3, 2025): 52–59. https://doi.org/10.48498/minmag.2025.241.5.004.

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The article discusses the current problem of the phosphorus industry related to the development of technology for the production of highly effective mineral fertilizers based on substandard phosphate raw materials. Phosphorites from the Chilisai deposit are proposed as such raw materials, which are classified as low-grade due to their high carbonate content (4.56–6.34% in terms of CO2). This creates environmental problems. Scanning electron microscopy and X-ray fluorescence analysis methods were used to study the physico-chemical properties of phosphorite samples. The results showed that phosp

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29

Kurbaniyazov, Rashid K., Jaloldin H. Khudoyberdiev, Akhmed M. Reymov, Shafoat S. Namazov, Ruzmat Radjapov, and Atanazar R. Seytnazarov. "CHARACTERISTICS OF NODULAR PHOSPHORITES OF KARAKALPAKSTAN AND THEIR PROCESSING INTO GRANULAR SIMPLE SUPERPHOSPHATE." ChemChemTech 68, no. 1 (2024): 109–19. https://doi.org/10.6060/ivkkt.20256801.7007.

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In conditions of deficit of phosphate fertilisers it is necessary to involve low-grade phosphate rock into agricultural production, and yolk phosphate rock can serve as an example. The difference of yolk phosphorite from other types of phosphate raw materials is that firstly: it contains a large amount of quartz, and secondly: the phosphate mineral in it is represented by kurskite; thirdly, in yolk phosphorite - kurskite relative content of assimilable form of P2O5 is 35-40%. The sieve analysis of Porlytau jelly phosphate flour showed that the coarseness class (-5+3)-(-2+1) mm accounts for hal

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Kareeva, A. I., A. A. Bolysbek, U. B. Nazarbek, P. A. Abdurazova, and Y. B. Raiymbekov. "Comprehensive study of physico-chemical properties of low-grade phosphate raw materials." Engineering Journal of Satbayev University 145, no. 1 (2023): 25–31. http://dx.doi.org/10.51301/ejsu.2023.i1.04.

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The focus of the article is on the characterization of low-grade Chilisai phosphorites through a comprehensive analysis of their physicochemical properties. The structure of phosphorites of this deposit was studied using modern instrumental methods, including chemical and energy-dispersive analysis, IR-Fourier spectroscopy, X-ray diffraction analysis and mineralogical analysis. According to the results of chemical analysis, the material composition of nodular phosphorites was determined, and the elemental mass composition was determined by the method of energy dispersive analysis. The qualitat

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Raiymbekov, Y., U. Besterekov, U. Nazarbek, and P. Abdurazova. "BENEFICIATION OF LOW-GRADE PHOSPHORITES BY HUMIC ACID." Rasayan Journal of Chemistry 14, no. 01 (2021): 46–50. http://dx.doi.org/10.31788/rjc.2021.1416080.

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Bazhirov, Т. S., K. Т. Zhantasov, О. B. Dormeshkin, K. N. Bazhirova, and Z. D. Toltebayeva. "Energy- and resource-saving processing of low-grade phosphorites." Теоретические основы химической технологии 49, no. 3 (2015): 292–94. http://dx.doi.org/10.7868/s004035711503001x.

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Bazhirov, T. S., K. T. Zhantasov, O. B. Dormeshkin, K. N. Bazhirova, and Z. D. Toltebayeva. "Energy- and resource-saving processing of low-grade phosphorites." Theoretical Foundations of Chemical Engineering 49, no. 3 (2015): 277–79. http://dx.doi.org/10.1134/s004057951503001x.

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Tagaev, Ilkhom, Nodirjon Doniyarov, Anvar Asrorov, Islom Murodov, N. KH Usanbaev, and Uktam Temirov. "Distinctive IR-Spectroscopic Features of Functional Groups of Low-Grade Phosphorites After Microbiological and Acid Processing." Land Science 2, no. 1 (2020): p43. http://dx.doi.org/10.30560/ls.v2n1p43.

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The article discusses the current problems of enrichment of low-grade phosphorites by the thermal method as well as the production of mineral fertilizers using various acids. An alternative biotechnological method for producing organomineral fertilizers using neutrophilic, heterotrophic microorganisms of activated sludge at a biochemical treatment station for municipal wastewater for the processing of low-grade phosphorites and the production of phosphorus-containing organomineral fertilizers is proposed.In this case, a natural acceleration of the processes of the phosphorus cycle in nature oc

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35

Jabbarbergenov, Madiyar Khojametova Biybimaryam Kaypovna. "THE PRODUCTION OF PHOSPHOROUS FERTILIZERS BASED ON KYZYLKUM PHOSPHORITES." EURASIAN JOURNAL OF ACADEMIC RESEARCH 3, no. 4 (2023): 53–55. https://doi.org/10.5281/zenodo.7837302.

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The production of phosphorus fertilizers all over the world is directly related to the processing of phosphate raw materials and the accumulation of man-made waste. Therefore, the development and implementation of rational and economic technical solutions that ensure the processing of low-grade phosphorites, elimination of waste and reduction of mineral acid consumption is an urgent task. It is for this purpose that the use of Kyzylkum phosphorites for the purpose of fertilizer production is an effective solution. Kyzylkum phosphorites are a low-grade, high-carbon class of phosphorites in term

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Soboleva, I. V., and S. E. Lyashenko. "Studying the Dihydrate Stage of the Process of Preparation of Extractive Phosphoric Acid by the Dihydrate–Hemihydrate Method from Low-Grade Phosphorites." Theoretical Foundations of Chemical Engineering 57, no. 4 (2023): 633–37. http://dx.doi.org/10.1134/s0040579523040267.

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Soboleva, I. V., and S. E. Lyashenko. "Studying the Hemihydrate Stage of the Process of Preparation of Extractive Phosphoric Acid by the Dihydrate–Hemihydrate Method from Low-Grade Phosphorites." Theoretical Foundations of Chemical Engineering 57, no. 4 (2023): 704–8. http://dx.doi.org/10.1134/s0040579523040279.

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Gerasimova, Lidia G., Marina V. Maslova, and Ekaterina S. Shchukina. "Synthesis of Sorption Materials from Low Grade Titanium Raw Materials." Materials 15, no. 5 (2022): 1922. http://dx.doi.org/10.3390/ma15051922.

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In this paper, a universal technology is proposed for processing low-titanium mineral raw material—apatite-nepheline ore waste, including its treatment with sulfuric or hydrochloric acid in a two-stage mode with a sequential increase in the concentration. This technique allowed us to remove nepheline and apatite in the first stage and achieve a titanium mineral content of TiO2 of more than 30%; in the second stage, we were able to convert the titanium into its precursors—titanyl sulfate monohydrate TiOSO4·H2O and a hybrid rutile-silica composition. The key stage in the sorbent synthesis is the

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Kandil, Abdel-Hakim T., Hamed I. Mira, Mohamed H. Taha, and Mohamed F. Kamel. "Production of pure phosphoric acid from El-Sebaeya low-grade phosphate ore." Separation Science and Technology 52, no. 4 (2016): 679–90. http://dx.doi.org/10.1080/01496395.2016.1252778.

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Kenzhaliyev, B. К., S. A. Kvyatkovskiy, S. A. Trebukhov, et al. "Development and Implementation of Innovative Technologies That Ensure an Increase in The Extraction of Non-ferrous, Noble, Rare, Rare-Earth Metals." Teknomekanik 5, no. 1 (2022): 1–12. http://dx.doi.org/10.24036/teknomekanik.v5i1.11972.

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The article presents the most innovative technologies developed by Satbayev University, "Institute of Metallurgy and Ore Beneficiation" JSC (Republic of Kazakhstan, Almaty) in recent years. The implementation of these works on an industrial scale will lead to significant economic and environmental effects. The following technologies are described: synthesis of a new foaming agent for intensification of flotation enrichment of gold-bearing ores; multicomponent microflotation, which allows to increase the extraction of valuable metals at existing deposits and to develop new, relatively poor and

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Allamuratova, A. Zh, A. U. Erkaev, A. M. Reimov, Saparbay Kazakhbaev, and Dilshodbek Kurbiyazov. "IMPROVING TECHNOLOGY FOR PRODUCING COMPLEX FERTILIZER FROM LOW-GRADE PHOSPHORITES OF THE CENTRAL KYZYLKUM." Chemical Technology, Control and Management 2024, no. 2 (2024): 05–12. http://dx.doi.org/10.59048/2181-1105.1557.

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Oljaev, D. N., T. I. Nurmurodov, N. I. Khurramov, and S. Sh Sharipov. "Effect of mechanochemical treatment of low-grade phosphorites on the optimal composition of phosphorus fertilizers." Obogashchenie Rud, no. 3 (June 30, 2023): 16–22. http://dx.doi.org/10.17580/or.2023.03.03.

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Li, Hao, Gideon Lambiv Dzemua, and Qi Liu. "Beneficiation Studies of the Low-Grade Skarn Phosphate from Mactung Tungsten Deposit, Yukon, Canada." Minerals 11, no. 4 (2021): 421. http://dx.doi.org/10.3390/min11040421.

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A preliminary beneficiation study of low-grade skarn phosphate rocks from Mactung tungsten deposit, along the Yukon and Northwest Territories border in Canada, was carried out through standard Bond Work Index, grinding test and laboratory batch flotation tests. The skarn phosphate sample assayed 12.65% P2O5 (about 30% apatite), 31.71% CaO and 35.46% SiO2. The main gangue minerals included calcite, quartz, calc-silicates, amphibole, feldspar, and pyrrhotite. The sample had a Bond Work Index of 19.04 kWh/t, belonging to a hard ore category. The beneficiation study of the skarn phosphate sample w

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Anarbayev, Abibulla, Balzhan Kabylbekova, Zhakhongir Khussanov, Bakyt Smailov, Nurlan Anarbaev, and Yevgeniy Kulikov. "Research of the Process of Obtaining Monocalcium Phosphate from Unconditional Phosphate Raw Materials." ChemEngineering 9, no. 2 (2025): 39. https://doi.org/10.3390/chemengineering9020039.

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The article presents methods for processing low-grade phosphate raw materials from the Chilisay deposit using a circulation method to produce mineral fertilizers and feed monocalcium phosphate. A study was conducted on the process of obtaining high-quality monocalcium phosphate, and optimal parameters for the decomposition of low-grade phosphate raw materials were determined. Based on the research, it was established that for the decomposition of phosphate raw materials, phosphoric acid with a concentration of 36–42% P2O5 should be used; the recycle phosphoric acid rate should be 540–560% of t

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Luo, Biwei, Pengfei Li, Yan Li, et al. "Optimization of medium–low-grade phosphorus rock carbothermal reduction process by response surface methodology." Green Processing and Synthesis 9, no. 1 (2020): 349–58. http://dx.doi.org/10.1515/gps-2020-0035.

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AbstractPhosphorus extraction from phosphorus rock was conducted by carbothermal reduction with silica and coke. The effects of reaction temperature, reaction time, coke excess coefficient, molar ratio of silicon–calcium, and phosphorus rock particle size on the phosphorus reduction rate were investigated by the response surface methodology (RSM). The central composite design (CCD) with five factors and five levels was used to explore the effects of variables’ interactions on the phosphorus reduction rate. The results showed that there are significant interactions between reaction time and tem

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Hidayat, Syamsul, Sri Yulianti, Dian Anggreini, and Syamsul Bahtiar. "Study of Nickel Leaching Using Sulfuric Acid and Phosphoric Acid on The Selectivity Nickel Ore." Jurnal Pijar Mipa 16, no. 3 (2021): 393. http://dx.doi.org/10.29303/jpm.v16i3.2602.

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Study of nickel leaching using sulfuric acid and phosphoric acid on the selectivity of low-grade laterite nickel ore under atmospheric conditions has been successfully carried out. In this study, the laterite nickel leaching process was carried out by varying the solution concentration and operating time. The concentrations of sulfuric acid and phosphoric acid solutions were varied at 5 M and 6 M concentrations, while the operating time was varied at 4 hours and 6 hours. For other operating conditions, it is kept constant with an operating temperature of 90 ℃, pulp density 15% w / v, particle

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Soboleva, I. V., and S. E. Lyashenko. "Mathematical Simulation and Optimization of Continuous Dihydrate–Semihydrate Production of Wet Process Phosphoric Acid From Low-Grade Ores." Theoretical Foundations of Chemical Engineering 58, no. 2 (2024): 463–68. https://doi.org/10.1134/s0040579524700763.

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Bahous, Raounak, Abdelaziz Idres, Ibtissem Zeriri, et al. "Processing of low-grade phosphate ores of Djebel Onk mine (Algeria) with electrostatic separation method." Mineralia Slovaca 56, no. 2 (2024): 181–94. https://doi.org/10.56623/ms.2024.56.2.5.

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Phosphate ore is an important raw material for manufacturing phosphorous fertilizers and chemicals. Although most phosphate resources cannot be marketed directly as raw material, including that from the Djebel Onk mine, due to their low P2O5 content and high impurity content. To obtain a quality phosphate concentrate, the enrichment of low-grade phosphate ore is therefore of great necessity. The objective of this research was to explore the use of mixtures consisting of three beige phosphate sub-layers and two black phosphate sub-layers as feed material. The objective of this study was also to

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Cao, Qin Bo, Shu Ming Weng, Chen Xiu Li, Shao Jun Bai, and Dan Liu. "Investigation on Beneficiation Strategy for Collophane." Advanced Materials Research 634-638 (January 2013): 3404–7. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3404.

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Phosphate being one of the three major nutrients required for agricultural plant growth usually presents as collophane in China. Since fine phosphate and other gauge minerals associate with each other and form intergrowth, the beneficiation of collophane is extremely difficult. In this paper, the flotation strategy for a low grade collophane ore from Guizhou province in China was studied in detail. Direct, reverse and direct-reverse combined flotation sheets were employed to collophane flotation. The results reveal that direct-reverse flotation is a suitable flotation flow sheet for this collo

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Luo, Biwei, Pengfei Li, Yan Li, et al. "Feasibility of fly ash as fluxing agent in mid- and low-grade phosphate rock carbothermal reduction and its reaction kinetics." Green Processing and Synthesis 10, no. 1 (2021): 157–68. http://dx.doi.org/10.1515/gps-2021-0008.

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Abstract The feasibility of industrial waste fly ash as an alternative fluxing agent for silica in carbothermal reduction of medium-low-grade phosphate ore was studied in this paper. With a series of single-factor experiments, the reduction rate of phosphate rock under different reaction temperature, reaction time, particle size, carbon excess coefficient, and silicon–calcium molar ratio was investigated with silica and fly ash as fluxing agents. Higher reduction rates were obtained with fly ash fluxing instead of silica. The optimal conditions were derived as: reaction temperature 1,300°C, re

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