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US 2013/0153436 A1Published application
Systems and methods for metal recovery
AssigneeFreeport-Mcmoran 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.
Claims12
A process comprising:
- 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.
1 more element
A system comprising:
- an oxidizing roaster configured to receive oxygen gas and configured to heat a metal bearing material to temperatures of from about 200° C. to about 800° C.;
- a reducing roaster configured to receive at least one of carbon monoxide gas and hydrogen gas and configured to heat the metal bearing material to temperatures of from about 200° C. to about 800° C.;
- a basic leaching vessel configured to receive a roasted and quenched metal bearing material from the reducing roaster and produce a basic pregnant leach slurry;
- a solution extraction train configured to receive the liquid portion of the basic pregnant leach slurry.
1 more element
Dependencies are inferred from the claim text.