Stimulation of frother separation of diamonds by optimizing collecting agent composition and temperature conditions

A promising way of enhancing recovery of commercial diamonds from kimberlite ore is improvement of the reagent regime of frother separation and, in particular, selection of composition of collecting agents and their application conditions. Using spectral extraction, the quantitative and qualitative distributions of lowand high-molecular fractions of collector in solid and liquid phases of frother separation are determined. The important role of resin and asphaltene fractions is emphasized: they irreversibly attach to diamond surface and ensure retention of drops of lowand medium-molecular hydrocarbons. Producibility of a collecting agent with the optimal ratio of fractions of light distillates, hydrocarbon oils, resin and asphaltenes by mixing fuel oil M-40 and diesel fuel at assigned proportions is substantiated. It is shown that the use of compound collectors at the mass fraction of fuel oil M-40 of 60–70% allows increasing recovery of diamonds by 2.7–3.5%. The proposed composition of a collector made of fuel oil M-40, diesel fraction and organic dispersant additives from cetone group stimulates dispersion of the collecting agent in water phase and enhances floatability of diamonds. The frother separation tests of developed compound collectors KSM-1 and KSM-2 have proved feasibility of the increased extraction of diamonds to concentrate by 5–7.5%. The selected temperature range of 14–24 °C for conditioning of initial ore feed with flotation agents and for the frother separation ensures the maximum recovery of diamonds in concentrate at high selectivity using the compound collectors based on fuel oil.

Keywords: diamonds, frother separation, extraction, UV spectroscopy, IR spectroscopy, compound collectors, fuel oil, diesel fuel.
For citation:

Morozov V. V., Pestryak I. V., Kovalenko E. G., Lezova S. P., Polivanskaya V. V. Stimulation of frother separation of diamonds by optimizing collecting agent composition and temperature conditions. MIAB. Mining Inf. Anal. Bull. 2022;(8):135-147. [In Russ]. DOI: 10.25018/0236_1493_2022_8_0_135.

Issue number: 8
Year: 2022
Page number: 135-147
ISBN: 0236-1493
UDK: 622.765.4
DOI: 10.25018/0236_1493_2022_8_0_135
Article receipt date: 01.04.2022
Date of review receipt: 30.05.2022
Date of the editorial board′s decision on the article′s publishing: 10.07.2022
About authors:

V.V. Morozov1, Dr. Sci. (Eng.), Professor, e-mail:, ORCID ID: 0000-0003-4105-944X,
I.V. Pestryak1, Dr. Sci. (Eng.), Professor, e-mail:, ORCID ID: 0000-0002-1745-6579,
E.G. Kovalenko, Cand. Sci. (Eng.), Chief Engineer, e-mail:, «Yakutniproalmaz» Institute, 678174, Mirny, Republic of Sakha (Yakutia), Russia,
S.P. Lezova1, Senior Lecturer, e-mail:, 
V.V. Polivanskaya1, Cand. Sci. (Eng.), Assistant Professor, e-mail:,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.


For contacts:

V.V. Morozov, e-mail:


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