Tashkent State Technical University, Tashkent, Uzbekistan

К. Т. Ochildiev, Associate Professor of the Department of Metallurgy, Candidate of Technical Sciences
Sh. А. Mukhametdzhanova, Associate Professor of the Department of Metallurgy, Candidate of Technical Sciences, e-mail: shoira.muhamet@gmail.com
S. Т. Matkarimov, Professor of the Department of Metallurgy, Doctor of Technical Sciences
S. К. Nosirkhudzhaev, Head of the Department of Metallurgy, Candidate of Technical Sciences, Associate Professor

The results of improving the technology of smelting sulfide copper concentrates in JSC Almalyk MMC to increase the efficiency of integrated use of raw materials in copper production are presented. In industrial conditions, the technology of melting copper sulfide concentrates in a reverberatory furnace with preliminary processing of converter slag and its introduction into the melting process was studied. The proposed technology was implemented in two stages. At the first stage, studies were carried out on the reduction and sulfidation of iron and copper oxides from liquid converter slag using a reducing-sulfiding mixture consisting of clinker and industrial sulfur. At the second stage, the recycled converter slag with copper sulfide concentrate was decoppered in a reverberatory furnace. As a result, the copper content in the slag dump from the furnace decreased from 0.82% to 0.45%. The results of a study aimed at reducing the content of matte droplet suspended in the slag and ensuring a more complete transition of copper into the matte bulk in the furnace are also presented. As a result, it was found that the matte droplet with a radius of 200 microns would pass through a 50 cm thick slag layer in 2.56 hours. In order to achieve a more complete extraction of copper from the matte contained in the slag, it was decided to raise the design of the slag exit threshold of the furnace by 5 cm. The implementation of this solution in practice has proved its effectiveness.

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