Hydrometallurgical process for the treatment of copper bearing o

Details Hydrometallurgical process for the treatment of copper bearing o Hydrometallurgical process for the treatment of copper bearing o

1994-10-14

1996-06-18

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75743, 205583, C22B 308

Patent

active

055273823

ABSTRACT:
A hydrometallurgical process for recovering copper from copper bearing ores or fractions, by a process of first wetting and sulfatizing the ore with controlled amounts of H.sub.2 SO.sub.4 and water, followed by acid curing and repulping to sulfatize a substantial portion of the copper in the ore. Also, the fine and coarse fractions can be classified, followed by pile leaching the coarse fraction, preferably reusing the cycled H.sub.2 SO.sub.4 solution obtained during the copper recovery process. Since the coarse fraction is classified from the fine fraction, the pile leaching process is performed at very high specific flows, which substantially reduces the leaching period as compared with that of conventional pile leaching.

REFERENCES:
patent: 5356457 (1994-10-01), Pincheira Alvarez et al.

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