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US 10,246,789 B2Granted
Systems and methods for copper recovery via roasting and leaching
AssigneeFreeport Minerals Corporation
InventorsJoanna M Robertson, Thomas R Bolles, Wayne W Hazen, Lawrence D May, Jay C Smith, David R Baughman
Life of this patent
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Abstract
Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
Claims19
A process comprising:
- roasting a metal bearing material comprising a copper carbonate under oxidizing conditions, at a temperature between about 625° C. and about 675° C.;
- roasting the metal bearing material under reducing conditions, at a temperature of about 500° C. or greater;
- and
- leaching the metal bearing material in a basic medium to yield a pregnant leach solution.
1 more element
A process comprising:
- oxidizing a metal bearing material comprising a copper carbonate to produce an oxidized metal bearing material at a temperature between about 625° C. and about 675° C.;
- reducing the oxidized metal bearing material at a temperature of about 540° C. to produce a roasted metal bearing material;
- and
- leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
1 more element
Dependencies are inferred from the claim text.