Modification of properties of rock-forming minerals during flotation

Examination and modification of properties of rock-forming minerals toward more efficient separation of valuable components from barren rock in the course of processing is a topical problem considering the worse quality of ore, very fine dissemination of minerals in barren rocks and the higher content of barren rock particles showing the increased flotation response, which contaminate and downgrade concentrate. The chosen methods to treat the surface of rock-forming minerals were processing by low temperatures and by reagents. The test subject was the monomineral quartz and calcite fractions and sulfide gold-bearing ore. The studies of the low-temperature effect on the value of free energy of mineral surface show its increase by 18.04 mN/m and 20.94 mN/m in quartz and calcite as the barren rock minerals, respectively. The increase results from the growth of the polar component, which enables reduction in the barren rock yield in flotation concentrates. The studies of the low temperature effect on the flotation of monomineral fractions of quartz and calcite show the decrease in their recovery by 1.73% and 2.08%, respectively. The reagent mode proposed for flotation of sulfide gold-bearing ore with high content of rock-forming minerals is based on the combination of the organic and inorganic depressants.

Keywords: flotation, low temperature effect, sulfide gold-bearing ore, wetting angle, free surface energy, rock-forming minerals, depressants.
For citation:

Aleksandrova T. N., Prokhorova E. O. Modification of properties of rock-forming minerals during flotation. MIAB. Mining Inf. Anal. Bull. 2023;(12):123-138. [In Russ]. DOI: 10.25018/0236_1493_2023_12_0_123.


The study was supported by the Russian Science Foundation, Project No. 23-47-00109.

Issue number: 12
Year: 2023
Page number: 123-138
ISBN: 0236-1493
UDK: 622.7
DOI: 10.25018/0236_1493_2023_12_0_123
Article receipt date: 03.05.2023
Date of review receipt: 15.08.2023
Date of the editorial board′s decision on the article′s publishing: 10.11.2023
About authors:

T.N. Aleksandrova1, Dr. Sci. (Eng.), Professor, Corresponding Member of Russian Academy of Sciences, Head of Chair, e-mail:, ORCID ID: 0000-0002-3069-0001,
E.O. Prokhorova1, Graduate Student, e-mail:, ORCID ID: 0000-0003-4208-3281,
1 Empress Catherine II Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.


For contacts:

E.O. Prokhorova, e-mail:


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