Nitric acid process for recovering metal values from sulfide ore materials containing iron sulfides
Abstract
Abstract A SULFIDE ORE MATERIAL CONTAINING SULFIDE IRON AND VALUES OF ONE OR MORE METALS IN THE GROUP CONSISTING OF COPPER, NICKEL, COBALT AND SILVER, IS SUBJECTED TO LEACHING WITH AN AQUEOUS SOLUTION OF NITRIC ACID UNDER CONDITIONS CONTROLLED TO INSURE THE FORMATION OF EASILY FILTERABLE HYDROGEN JAROSITE (3FE2O3.SO3.4SO3.9H3O), OR A SIMILAR BUTLESS DESIRABLE IRON COMPOUND (2FE2O3.SO3.5H2O), WHICH IN PRECIPITATED. ELEMENTAL SULFUR IS FORMED AND LEAVES THE LEACH SYSTEM, ALONG WITH THE PRECIPITATED IRON VALUES AND UNREACTED SULFIDE MINERALS, IN THE FILTER CAKE. UNREACTED SULFIDE MINERALS ARE EASILY SEPARATED FROM THE OTHER SOLIDS BY CONVENTIONAL FROTH FLOTATION AFTER REMOVAL OF THE ELEMENTAL SULFUR, AND RECYCLED TO THE LEACH SYSTEM.
Inventors
- 👤 P Queneau
- 👤 J Prater
Bibliographic Details
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