Recovery of copper from chalcopyrite utilizing copper...

Details Recovery of copper from chalcopyrite utilizing copper... Recovery of copper from chalcopyrite utilizing copper...

C - Chemistry, Metallurgy

22

B

53/289

C22B 15/08 (1980.01)

Patent

CA 1065143

RECOVERY OF COPPER FROM CHALCOPYRITE UTILIZING COPPER SULFATE LEACH ABSTRACT OF THE INVENTION Copper is recovered from chalcopyrite by means of a pollution-free hydrometallurgical process which entails leaching and converting the chalcopyrite with copper sulfate in order to produce an insoluble copper sulfide, a soluble iron sulfate and sulfuric acid. A secondary leach is then conducted in order to react the copper sulfide with oxygen in the presence of a jarosite-forming cation to produce a soluble copper sulfate and an insoluble iron bearing jarosite. This copper sulfate is separated from the jarosite and sent to a copper recovery process and/or recycled. Alternatively, the copper sulfide from the initial leach may be separated from the iron sulfate solution immediately after the initial leach, and this copper sulfide can be treated with other processes to produce elemental copper and sulfur.

243025

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