Prevention of Aggregate Formation During Oxidation Pressure Leaching.
TMS Tech Paaper A85-22 Metall Soc AIME Warrendale, Pennsylvania, 1985 :15 pages
Sulfur-bound aggregates, formed during oxidation pressure leaching of pyritic concentrates, can cause severe operating difficulties. Laboratory scale research was conducted by the Bureau of Mines that resulted in a selective pressure-leach technique that solubilizes the metal values for recovery and prevents aggregate formation. The method primarily involves (1) avoiding pyrite overgrinding and (2) leaching with low partial pressures of oxygen. Data are presented for cobaltite-bearing concentrates from a domestic source. Over 90% of the cobalt and nickel were extracted, leaving unaggregated residues containing iron arsenates and pyrite.
TMS Tech. Paaper A85-22, Metall. Soc. AIME, Warrendale, PA, 1985, 15 Pp