Acid dissolution of iron-bearing zinc concentrates - A first step towards residue-free zinc refining?

Molleman, E. ; van Sandwijk, T. ; Van Weert, G.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 5
Publication Date: Jan 1, 1999
This paper reports on test work that explored the dissolution/precipitation reaction: ZnS + 2HCl - ZnC12 + H2S, which is part of a process used in the production of pure ZnS. The research focused on the influence of proton activity on the dissolution of zinc concentrates obtained from the Brunswick Mine No. 12 in Canada (Brunswick Mining & Smelting); the Red Dog deposit in Alaska (Cominco Ltd.); and the Tara deposit in Ireland (Outukumpu Zinc). A comparison between the results of the experimental dissolution as a function of pH and the dissolution predicted by thermodynamics suggest that the three concentrates contained sig┬Čnificant amounts of the more reactive mineral wurtzite, although XRD analysis showed mainly the presence of the mineral sphalerite.
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