, Volume 37, Issue 7, pp 53–56 | Cite as

Kinetic Study on Catalytic Leaching of Sphalerite

  • John S. Niederkorn
Process & Extractive Metallurgy Research Summary


This paper examines the influence of cobalt and silver ion concentration on the extraction and kinetics of zinc dissolution from sphalerite. The mechanism involves catalysis of a galvanic oxidation! reduction that produces elemental sulfur in place of SO2 gas.

A 95% maximum zinc recovery was achieved under the experimental conditions. The apparent activation energy suggested a diffusion controlled reaction. The research indicates that cobalt ions are more effective than silver ions because the replacement of zinc ions is facilitated by dimensional similarities between the zinc and cobalt.


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© TMS 1985

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  • John S. Niederkorn

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