Chair of Non-Ferrous Metals and Gold, National University of Science and Technology “MISiS”, Moscow, Russia:

E. E. Zholdasbay, Master's Degree Student, e-mail: zholdasbai_erzhan@mail.ru

Zh. Zh. Kabylbekov, Master's Degree Student

A. N. Fedorov, Professor

Chair of Non-Ferrous Metals' Metallurgy, Kazakh National Technical University named after K. I. Satpayev, Almaty, Republic of Kazakhstan:

N. K. Dosmukhamedov, Professor

Behavior of Cu, As and Sb during smelting of copper- and lead-containing raw materials in the conditions of blast concentrating smelting (LLP “Kazzinc”) was researched on the basis of statistical analysis of industrial compositions of copper-lead matte and lead bullion. Exposure of mechanism of formation and behavior of various compositions of lead and copper during matte smelting of copper- and lead-containing complex-composition materials is of a great theoretical and practical interest. At the same time, in the conditions of the considered process of blast concentrating smelting, a great attention is paid to obtained mattes, which composition is complex because of increased content of various impurities. This article shows the mechanism of transfer of Cu, As and Sb from copper-lead matte into lead bullion. There was made a definition, that high temperature of slag melt in furnace (~1350ºC) leads to sharp increasing of obtained lead bullion temperature (~850–900 ^°C). At the same time, copper transfer into lead bullion in the form of Cu₃As and Cu₃Sb is increased. After the process of blast concentrating smelting, copper and arsenic are present in lead bullion in the form of stable compound (Cu₃As). Antimony is present in lead bullion both in a form of Cu₃Sb, and in a free state (in a form of dissolved metal). At the same time, the parts of defined types of antimony in lead alloy are similar and make up 52 and 48%, respectively. Formation of Cu₃Sb in lead alloy is carried out at the expense of interaction of copper with antimony. At the same time, copper arsenide is formed as a result of both direct interaction of copper with arsenic, and as a result of reaction flow between Cu₃Sb and arsenic. 

This article was prepared within the strategic program of development of Engineering Center “Center of Engineering of Industrial Technologies” (National University of Science and Technology “MISiS”), realized with the financial support of the Ministry of Education and Science of Russian Federation.

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