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Improvement of frother separation mode in processing of supergene alteration-worn diamond-bearing kimberlite

An efficient trend of reduction in loss of fine diamonds extracted from kimberlite is improvement of frother separation mode, in particular, selection of temperature and reagent mode for main process flows. An important factor of this technology efficiency is the water phase composition, which is critical in the conditions of closed water circulation. The thermodynamic calculations and physicochemical research determined the causes of the decrease in the frother separation efficiency with water circulation, namely, hydrophilization of diamond surfaces by carbonate and silica films and subsequent attachment of slime fines to them, as well as the decreased intensity of reagents in water phase in case of its high mineralization. The thermodynamic modeling defined conditions of disintegration of hydrophilic films and recovery of natural hydrophobic behavior of diamonds. The temperature mode is selected for thermal treatment, conditioning of ore feedstock with a collector and the frother separation itself, which ensures maximal recovery of diamonds in concentrate at high selectivity of the process. It is proposed to use compound collectors with black oil fuel F-5 and diesel technology fraction which preserve their properties in heavily mineralized media. Moreover, it is suggested to use dispersants of barren rocks and kimberlite slimes which are unprecitable by calcium ions. The developed mode was tested on a pilot automated plant of frother separation and demonstrated the decrease in the loss of diamonds by 9.8–10.7%.

Keywords: diamonds, frother separation, hydrophilic behavior, oil receptivity, conditioning, closed water circulation, compound collectors, depressants.
For citation:

Morozov V. V., Kovalenko E. G., Dvoichenkova G. P., Polivanskaya V. V. Improvement of frother separation mode in processing of supergene alteration-worn diamondbearing kimberlite. MIAB. Mining Inf. Anal. Bull. 2024;(1):5-19. [In Russ]. DOI: 10.25018/ 0236_1493_2024_1_0_5.

Acknowledgements:
Issue number: 1
Year: 2024
Page number: 5-19
ISBN: 0236-1493
UDK: 622.765.4
DOI: 10.25018/0236_1493_2024_1_0_5
Article receipt date: 17.10.2023
Date of review receipt: 11.11.2023
Date of the editorial board′s decision on the article′s publishing: 10.12.2023
About authors:

V.V. Morozov1, Dr. Sci. (Eng.), Professor, Professor, e-mail: dchmggu@mail.ru, ORCID ID: 0000-0003-4105-944X,
E.G. Kovalenko, Cand. Sci. (Eng.), Chief Engineer, «Yakutniproalmaz» Institute of the ALROSA JSC, Republic of Sakha (Yakutia), 678174, Mirny, Russia, e-mail: kovalenkoeg@alrosa.ru, ORCID ID: 0000-0002-0320-0839,
G.P. Dvoichenkova, Dr. Sci. (Eng.), Leading Researcher, Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia;
Mirny Polytechnic Institute (branch) of North-Eastern Federal University, 678174, Mirny, Russia, e-mail: dvoigp@mail.ru, ORCID ID: 0000-0003-3637-7929,
V.V. Polivanskaya1, Cand. Sci. (Eng.), Assistant Professor, e-mail: vpolivaskaya@mail.ru, ORCID ID: 0000-0002-1973-0914,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.

 

For contacts:

V.V. Morozov, e-mail: dchmggu@mail.ru.

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