期刊
HYDROMETALLURGY
卷 72, 期 1-2, 页码 159-165出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2003.10.002
关键词
malachite; dissolution; copper; sulphuric acid; leaching; kinetics
A kinetic study of the sulphuric acid leaching of oxidised copper ore, primarily malachite, was carried out. The effects of leaching time, stirring speed, acid concentration, solid to liquid ratio, reaction temperature, and particle size of the ore were investigated. Using the best conditions, the copper recovery was nearly 94% at 25degreesC and 99% at 80degreesC after 180 min leaching. Dissolution of malachite during the leaching was described by a logarithmic function, y = a ln(x) + b. The data obtained for the leaching kinetics indicated that the initial dissolution of malachite is a diffusion controlled reaction. (C) 2003 Elsevier B.V. All rights reserved.
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