Passivation of sulfidic iron-containing rock
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United States of America Patent
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Dec 25, 2007
Grant Date -
May 19, 2005
app pub date -
May 6, 2004
filing date -
Jul 10, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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