US Patent:
20050103402, May 19, 2005
Inventors:
Maurice Fuerstenau - Reno NV, US
Manoranjan Misra - Reno NV, US
Stefan Beck - Reno NV, US
International Classification:
C23C022/00
C23C022/48
C23C008/10
C01C001/00
C01D001/00
C01F001/00
C22B001/00
C01G001/00
C01B003/00
C22B001/14
US Classification:
148243000, 148273000, 148287000, 075746000
Abstract:
A method for passivating sulfidic iron-containing rock comprising: contacting sulfidic iron-containing rock with a magnesium-containing substance, a manganese-containing substance, and a calcium-containing substance; and adjusting the pH of the system to below about 11, is provided. The method can be used to prevent acid rock drainage of metal-bearing rocks or to produce a pretreated ore or rock which can be contacted with a lixiviating agent to extract metals from the pretreated ore or rock.