For the treatment of mixed copper-cobalt oxide minerals, a sulphuric acid bake-leach process was investigated as an alternative to reductive leaching. On the dissolution of copper and cobalt, the effects of acid dose, baking temperature, baking duration, and leaching time were examined. The combined copper-cobalt oxide ore was treated with sulphuric acid before being baked in a muffle furnace. The reacted samples were subjected to water leaching at room temperature to examine the leachability of copper and cobalt from the baked material.
Acid concentration affected the dissolution of copper and cobalt differently, with cobalt being more sensitive to acid concentration. Copper and cobalt were quickly removed from the baked material without the application of reducing agents. For copper-cobalt oxide ores, the sulfuric acid bake-leach process has been found to be a practical substitute for the reductive leaching approach.
Author (s) Details
Precious Mwamba
Department of Metallurgy and Mineral
Processing, University of Zambia, Lusaka, Zambia and Department of
Metallurgy, Copperbelt University, Kitwe, Zambia.
Jewette H. Masinja
Department of Metallurgy and Mineral
Processing, University of Zambia, Lusaka, Zambia.
James Manchisi
Department of Metallurgy and Mineral
Processing, University of Zambia, Lusaka, Zambia.
Leonard Kabondo
Department of Metallurgy, Copperbelt
University, Kitwe, Zambia.
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