COMPARISON OF TWO METHODS OF GOLD ORE FLOTATION

The results of the beneficiation of gold ore, which contains more than 60% free (extractable by amalgamation) gold contents sulphides are minor, but there is melkorazmernye carbon in organic form. Adopted gravity-flotation flowsheet ore. Gravitational methods of enrichment of gold is isolated in a cycle of grinding-classification. Provided refinement of the gravity concentrate to the «Golden head», a small outlet which allows the conditions of the enterprise to revise its brushless fuse on the actual metal.
Used the scheme of «two jets»: from ½ part of the original raw materials emit rough concentrate 1st jet flotation, mixed with the other ½ part of the ore and process using the aerosol (a mixture of air with water vapor with a temperature of 104 °C) column flotation emit finished a rough concentrate of the 2nd jet flotation.
It is established that with overall high gold recovery using new technology metal recovery above the base, at the expense of reduction of losses with final tailings from 9.21 to 5.57%. The degree of concentration of gold in flotation increased from 19.8 to 27.5 units, the output of the flotation concentrate is reduced by 21% Rel., reducing the cost of expensive reagents for sorption cyanidation of concentrate and chlorine neutralization cyanoderma pulp.
Discuss the main causes and factors for high efficiency of developed technology. Used ideas of the two States of the wetted surface of Wenzel (the solid body is in contact with the liquid) and Cassie-Baxter (within cavities of the topography of the stored microbubbles of air). It is shown that the power factor responsible for the formation of photocouplers as a result of coalescence of bubbles of the surface (as Cassie-Baxter) with an air bubble, filled with hot water vapor, are hydrophobic interactions.

This study has been supported in the framework of Grant Agreement No. 14.577.21.0142 (RFMEFI57714X0142).

Keywords

Gold, extraction, jet flowsheet, aerosol column flotation, hydrophobic interaction.

Issue number: 11
Year: 2016
ISBN:
UDK: 622.765
DOI:
Authors: Evdokimov S. I., Evdokimov V. S.

About authors: Evdokimov S.I., Candidate of Technical Sciences, Assistant Professor, e-mail: eva-ser@mail.ru, North Caucasus Mining-and-Metallurgy Institute (State Technological University), 362021, Vladikavkaz, Republic of North Ossetia-Alania, Russia, Evdokimov V.S., Junior Researcher, LLC Scientific-Production Enterprise GEOS», 362035, Vladikavkaz, Republic of North Ossetia-Alania, Russia.

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