Pressure Leaching of Copper Arsenic-Containing Mattes
with Copper Sulfate Solutions

K. A. Karimov*, S. S. Naboichenko**, and V. I. Neustroev***

Ural Federal University, ul. Mira 19, Yekaterinburg, 620002 Russia

*e-mail: kirill_karimov07@mail.ru

**e-mail: svmanyachenkov@yandex.ru

***e-mail: neustrpoev1948@mail.ru

Received April 25, 2015; in final form June 30, 2015; accepted for publication July 6, 2015

Abstract—The topicality is shown to improve the processing technology of complex polymetallic raw material
containing a considerable amount of toxic impurities of arsenic and lead. Results on pressure leaching the
mattes formed after reduction smelting the dusts of OAO Sredneural’skii Copper Smeltery (SUMZ) by solu-
tions of copper sulfate are discussed. These mattes contain a considerable amount of lead and arsenic. Accord-
ing to the data of X-ray phase analysis of matte samples, phases of sulfides (PbS, PbS As₂S₃, Cu₂S, FeS, and
(Zn,Fe)S) and arsenides (FeAs₂, Cu₃As, FeAs, and Cu_0.85As_0.15), as well as inclusions of metallic copper, are
revealed in them. Optimal parameters of matte leaching by copper sulfate solutions are the temperature of 150–
180C, acidity from 5 to 30 g/dm³, and copper concentration of 14–32 g/dm³. This process made it possible to
extract 85% As into the solution, while copper and lead remained in the cake in this case.

Keywords: polymetallic raw material, smelting, matte, pressure leaching, copper, lead, arsenic, recovery

DOI: 10.3103/S1067821216010077

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