Process for recovery of precious metals from copper containing materials
Abstract
Abstract A PROCESS FOR RECOVERY OF PRECIOUS METAL VALUES FROM SOLID PARTICLES OF SULPHIDIC CONCENTRATES, MATTES AND THE LIKE CONTAINING COPPER IS DESCRIBED. THE PROCESS COMPRISES, IN PART, THE PREFERENTIAL LEACHING OF COPPER FROM PRECIOUS METALS IN THE SOLIDS AND THE INVENTION SEEKS TO OPTIMIZE THE SEPARATION OF COPPER FROM PRECIOUS METALS BY CONDITIONING THE SOLIDS PRIOR TO PREFERENTIAL LEACHING OF COPPER, BY TREATING THE SOLIDS AS AN AGITATED SLURRY IN A MINERAL ACID-BEARING SOLUTION IN THE PRESENCE OF HYDROGEN SULPHIDE. SUBSEQUENT TO THE SEPARATION OF COPPER FROM PRECIOUS METALS, THE PROCESS FURTHER COMPRISES REMOVING FROM THE LEACHED SOLIDS THE ELEMENTAL SULPHUR GENERATED DURING LEACHING, DISSOLVING PRECIOUS METALS FROM THE REMAINING SOLIDS IN AQUA REGIA, AND RECOVERING PRECIOUS METAL VALUES F ROM THE SOLUTION. AN ADVANTAGE OF THE PROCESS IS THAT ALL OF THE PRECIOUS METALS ARE RENDERED SOLUBLE IN THEAQUA REGIA LEACH.
Inventors
- 👤 L Hougen
- 👤 H Zachariasen
Bibliographic Details
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