Tashkent State Technical University, Tashkent, Uzbekistan:

S. T. Matkarimov, Professor at the Department of Metallurgy, Head of the Laboratory of the Uzbek-Japanese Youth Centre for Innovation, Doctor of Technical Sciences
B. T. Berdiyarov, Head of the Department of Metallurgy, Doctor of Technical Sciences
Sh. A. Mukhametzhanova, Associate Professor at the Department of Metallurgy, Candidate of Technical Sciences, e-mail: shoira.muhamet@gmail.com

This paper describes a study that looked at the possibility of obtaining ironbearing alloys when processing old copper slags generated by the Almalyk MMC site. A series of laboratory tests was carried out to test low and hightemperature reduction using Angren coal as a reducing agent. Almalyk MMC’s old copper slags contain up to 2.0% of copper, whereas the concentration of iron oxides, including magnetite, can reach more than 35%. These figures suggest that these copper slags could be considered as an additional source of iron compounds. The conducted study was aimed at solving the problem of waste recycling, in which the authors looked at the processes of iron oxide reduction from old copper slags. The results obtained were positive, thus showing the effectiveness of the processing technology in view. Optimum compositions of samples, as well as the reduction temperature and duration, were chosen in order to achieve a high degree of iron and copper oxide reduction. During a laboratory study of low-temperature reduction conducted at the temperatures of 900 to 1,100 ^oC, the reduction degree reached was 64.5% for iron oxides and 40.3% for copper oxides. Two types of product were obtained during high-temperature reduction: an iron-bearing alloy containing 84.5 to 92.9% of iron and up to 1.4% of copper, plus slags. The latter can be recommended for use in the construction industry.

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