Use of placer gold as mineral carrier in flotation of gold ore

Authors: Evdokimov S. I., Gerasimenko T. E.

It follows from the stability theory of hydrophobic colloids that mostly particles of different size aggregate. Probability of collision of fines with large surface is higher than probability of aggregation of equal size particles. It is found that interaction of particles features selectivity: adhesion numbers reach maximal values when particles attach to bearing surfaces of the same wettability. Based on the laws of aggregation in polydisperse mineral systems, comparatively big particles of gold, for instance, prepared to flotation using collectors, can serve as mineral carriers for finer gold. This comparatively big gold to act as mineral carrier is advised to be extracted from placers, including waste piles. In this case, two problems are solvable. First, the required amount of the mineral carrier of high floatability can be produced. Second, joint processing of natural gold ore and waste material offers an aggregate profit while separate treatment of waste piles is often loss-making. It is shown that flotation with mineral carrier represented by free gold from sand-and-gravel mixture ensures higher gold recovery in concentrate. The increment in extraction of gold takes place owing to reduced loss of fine gold in tailings. The studies into adherence kinetics of particles yield that the cause of aggregation in case of using relatively coarse free gold as mineral carrier is high probability of collision between these coarse particles and gold fines at a shorter time of induction.

Keywords: ore, placer, gold, recovery, gravity, flotation, mineral carriers, adhesion, kinetics.
For citation:

Evdokimov S. I., Gerasimenko T. E. Nazvanie. MIAB. Mining Inf. Anal. Bull. 2020;(2):139151. [In Russ]. DOI: 10.25018/0236-1493-2020-2-0-139-151.

Issue number: 2
Year: 2020
Page number: 139-151
ISBN: 0236-1493
UDK: 622.765
DOI: 10.25018/0236-1493-2020-2-0-139-151
Article receipt date: 11.11.2019
Date of review receipt: 19.12.2019
Date of the editorial board′s decision on the article′s publishing: 20.01.2020
About authors:

S.I. Evdokimov1, Cand. Sci. (Eng.), Assistant Professor, e-mail:,
T.E. Gerasimenko1, Cand. Sci. (Eng.), Assistant Professor, Head of the Department of Intellectual Property,
1 North Caucasus Mining-and-Metallurgy Institute (State Technological University), 362021, Vladikavkaz, Republic of North Ossetia-Alania, Russia


For contacts:

S.I. Evdokimov, e-mail:


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