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ArticleName Developing a technique for processing fine copper smelter dusts
DOI 10.17580/tsm.2020.08.03
ArticleAuthor Marchenko N. V., Kovtun O. N.

Siberian Federal University, Krasnoyarsk, Russia:

N. V. Marchenko, Associate Professor, Department of General Metallurgy1, Candidate of Technical Sciences, e-mail:
O. N. Kovtun, Associate Professor, Department of General Metallurgy1, Candidate of Technical Sciences


Fine dusts are mainly produced as a result of sublimation of highly volatile components during pyrometallurgical processing. The chemical composition of sublimates drastically differ from that of the primary raw material and sublimates contain volatile valuable components, such as zinc, lead, cadmium, antimony, indium, germanium, arsenic and rare metals. Such dusts are predominantly processed with the help of pyrometallurgical techniques, which are associated with high processing costs and low-quality products requiring further processing. This paper describes a hydrometallurgical technique for processing fine copper smelter dusts while defining optimum process parameters. It is proposed to use a sulphuric acid solution at the temperature of 60 oС and with the acid concentration of 130 g/l as a leaching solution for dusts. In these conditions, the following elements transfer to the solution, %: 96–97 Zn; 38–40 Cu; 68–70 Sn; 74–75 Cd; 94–95 Ge; 20–22 Sb; 18–20 As; 68–70 Fe. After leaching, the resultant multicomponent solution has the following composition, g/l: 37–38 Zn; 8–10 Cu; 13.1–13.2 Fe; 1.0–1.1 As; 0.2–0.3 Sb; 0.9–1.0 Cd; 0.5–0.55 Sn; 0.14–0.15 Ge. It is proposed to use such techniques as hydrolysis, cementation, concentration by evaporation and others to recover these metals from the solution. The proposed dust disposal technique helps tackle two tasks: it prevents the potential impact on the environment and human health and diversifies ore utilization. An equipment setup was designed, and a feasibility study was carried out for the proposed technique.

keywords Fine dusts, sublimation, highly volatile components, recovery, leaching, multicomponent solutions, cementation, hydrolysis, deposit, technique

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