Improvement of reagent regimes to recover phosphate minerals from fine ore and waste

Authors: Barmin I. S., Morozov V. V., Polivanskaya V. V.

Considerable loss of phosphoric anhydride in processing of apatite–shtaffelite ore and old tailings is conditioned by low recovery of phosphates from fines. The loss of phosphate fines is caused by their unselective flocculation with rock-forming minerals both at the stage of thickening and inside flotation machines. In order to increase the recovery of phosphate fines, it is necessary to create conditions for their extraction from floccules with rock-forming minerals and to stimulate selective flocculation. For the reduction in the loss of phosphate fines, it is suggested to treat thickened slimes of apatite-bearing ore and old tailings using mixtures of dispersion agents. It is shown that liquid glass and caustic soda ensure desorption of 46–56% of a flocculant from the surface of phosphate minerals and attenuate unselective secondary flocculation. The in-process tests prove that pre-treatment of apatite–shtaffelite ore slimes using liquid glass and caustic soda enhances flotation recovery of phosphoric anhydride by 1.4% with concentrate quality by 0.5% higher. The similar operation of pre-treatment of ground sand slimes during processing of old tailings used sulfite liquor, soda salt and agent Neonol-AF 9-8 as dispersion agents (at consumption of 60–85 g/t). The test results show that pre-treatment of the thickened product increases flotation recovery of phosphoric anhydride by 1.5% at the higher quality of apatite concentrate by 0.35%.

Keywords: Apatite-bearing ore, old tailings, slimes, thickening, deflocculation, dispersion agents, desorption, flotation.
For citation:

Barmin I. S., Morozov V. V., Polivanskaya V. V. Improvement of reagent regimes to recover phosphate minerals from fine ore and waste. MIAB. Mining Inf. Anal. Bull. 2020;(1):149-159. [In Russ]. DOI: 10.25018/0236-1493-2020-1-0-149-159.

Issue number: 1
Year: 2020
Page number: 149-159
ISBN: 0236-1493
UDK: 622.765.4
DOI: 10.25018/0236-1493-2020-1-0-149-159
Article receipt date: 03.09.2019
Date of review receipt: 05.11.2019
Date of the editorial board′s decision on the article′s publishing: 20.12.2019
About authors:

V.V. Morozov1, Dr. Sci. (Eng.), Professor, e-mail:,
I.S. Barmin, Cand. Sci. (Eng.), Head Specialist of Mineral Processing Processes,
JSC «Mineral and chemical company «EuroChem»», Moscow, Russia,
V.V. Polivanskaya1, Cand. Sci. (Eng.), Assistant Professor, e-mail:,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.
Corresponding author: V.V. Morozov, e-mail:

For contacts:

V. V. Morozov, e-mail:


1. Brylyakov Yu. E., Gershenkop A. Sh., Lygach V. N. Current state and main directions of development of technology of deep and complex processing of phosphorus-containing ores. Gornyy zhurnal. 2007, no 2, pp. 30—38. [In Russ].
2. Tugolukov A. V., Barmin I. S., Novozhilova V. V. Brylyakov Yu. E. Investigation and optimization of technology of flotation enrichment of ores Kovdorskiy staffelite Apatite deposits. Gornyy zhurnal. 2012, no 10, pp. 71—76. [In Russ].
3. Santana R. C., Farnese A. C. C., Fortes M. C. B., Ataide C. H., Barrozo M. A. S. Influence of particle size and reagent dosage on the performance of apatite flotation. Separation and Purification Technology. 2008, Vol. 64, no 1, pp. 8—15.
4. Beloborodov V. I., Zakharova I. B., Andronov G. P. Prospects of development of phosphoruscontaining mineral resource base of JSC «Kovdorsky GOK». Gornyy zhurnal. 2010, no 9, pp. 73—77. [In Russ].
5. Hogg R., Bunnaul P., Suharyono H. Chemical and physical variables in polymer-induced flocculation. Mining, Metallurgy & Exploration, 1993, Vol. 10, no 2, pp. 81—85.
6. Nebera B. P. Flokulyatsiya mineral'nykh suspenziy [Flocculation of mineral suspensions], Moscow, Nedra, 1983, 288 p.
7. Somasundaran P., Das K. K., Yu X. Selective flocculation. Current Opinion in Colloid & Interface Science, 1996, Vol. 1, no 4, pp. 530—534. DOI: 10.1016/s1359-0294(96)80123-3.
8. Beloborodov V. I., Andronov G. P., Zakharova I. B. Flotation of Apatite-staffelite ore using the technology of selective flocculation of sludge. Obogashchenie rud. 2004, no 6, pp. 6—9. [In Russ].
9. Wei S., Sonsie R., Forbes E., Franks G. V. Flocculation/flotation of hematite fines with anionic temperature-responsive polymer acting as a selective flocculant and collector. Minerals Engineering. 2015, 77, pр. 64—71.
10. Kawatra S. Komar, Carlson J. T. Beneficiation of phosphate ore. Society of Mining, Metallurgy and Exploration, Englewood, Colorado, USA, 2014, 154 p.
11. Pestryak I. V. Development and justification of efficient methods for recycling water conditioning at processing plants. Gornyy informatsionno-analiticheskiy byulleten’. 2018, no 7, pp. 153—159. [In Russ]. DOI: 10.25018/0236-1493-2018-7-0-153-159.
12. Yaoyang Ruan, Dongsheng He, Ruan Chi. Review on beneficiation techniques and reagents used for phosphate ores. Minerals. 2019, 9(4), 253. DOI:10.3390/min9040253
13. Polivanskaya V. V., Morozov V. V. The using of IR spectrophotometry for the analysis of the processes of deflocculation of thickened slurry classes of apatite-containing ores. Materialy XXIV mezhdunarodnoy nauchno-tekhnicheskoy konferentsii «Nauchnye osnovy i praktika pererabotki rud i tekhnogennogo syr'ya». Ekaterinburg, 2019, pp. 385—389. [In Russ].
14. Lygach A. V., Ignatkina V. A., Lygach V. N. New technologies of processing phosphorous ores. Gornyy informatsionno-analiticheskiy byulleten’. 2016, no 1, pp. 345—359. [In Russ].
15. Liu X., Ruan Y., Li C., Cheng R. Effect and mechanism of phosphoric acid in the apatite/dolomite flotation system. International Journal of Mineral Processing. 2017, Vol. 167, pр. 95—102.
16. Barmin I. S., Beloborodov V. I., Polivanskaya V. V. Improving the efficiency of enrichment of fine-grained tailings of Kovdor GOK. Gornyy informatsionno-analiticheskiy byulleten’. 2015, no 10, pp. 146—155. [In Russ].
17. He H., Wang W., Li R., Yu L. Study on flotation of scrubbed tailings from phosphate ore. Ind. Miner. Process, 2015, 11, pp. 4—10.

Our partners

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.