Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 21    No. 9    September 2011

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Recovery of cobalt from converter slag of Chambishi Copper Smelter using reduction smelting process
ZHAI Xiu-jing1, LI Nai-jun2, ZHANG Xu1, FU Yan1, JIANG Lan1

1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;
2. School of Science, Shenyang University, Shenyang 110044, China

Abstract:The reduction smelting process for cobalt recovery from converter slag of the Chambishi Copper Smelter in Zambia was studied. The effects of reducing agent dosage, smelting temperature and time and the addition of slag modifiers (CaO and TiO2) were investigated. In addition, the depleted slag and cobalt-bearing alloy were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. Under the determined conditions, 94.02% Co, 95.76% Cu and less than 18% Fe in the converter slag were recovered. It was found that the main phases of depleted slag were fayalite and hercynite; and the cobalt-bearing alloy mainly contained metallic copper, Fe-Co-Cu alloys and a small amount of sulfide.


Key words: converter slag; cobalt recovery; reduction smelting; slag modifier; cobalt-bearing alloy

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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