Hydrometallurgical process for copper recovery
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United States of America Patent
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Jan 6, 1987
Grant Date -
N/A
app pub date -
Jul 30, 1985
filing date -
Jul 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved hydrometallurgical process for the recovery of metallic copper, elemental sulfur, compounds of molybdenum and other valuable materials from copper sulfide ore concentrates, such as chalcopyrite. The process, comprising a reduction stage, metallic copper recovery stage, and a combined regeneration-purge-oxidation stage, is improved by the addition of a second reduction stage following the first or primary reduction stage, and by the addition of a by-product recovery stage after the second or secondary reduction stage. The secondary reduction stage also enhances overall process performance by allowing more flexible operating practices.
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