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Title:
金の浸出方法
Document Type and Number:
Japanese Patent JP4642796
Kind Code:
B2
Abstract:

To provide a method for efficiently leaching at least copper and gold from copper sulfide ores.

The method for leaching gold comprises steps of: subjecting a gold-containing copper sulfide ore and/or a copper sulfide ore containing gold-bearing silicate ore to leaching of copper until copper grade in the copper sulfide ore reaches ≤7.9%; mixing the resultant gold-containing sulfide ore and/or copper sulfide ore containing gold-bearing silicate ore, in which copper grade is made to ≤7.9%, with a solution in which chlorine ions and ferric ions are dissolved or carrying out mixing in a state where air is blown into a solution containing chlorine ions and iron ions and the iron ions can be made trivalent by oxidation with oxygen in the air; applying stirring while adjusting pH to ≤1.9; and dissolving at least gold into the solution by the oxidizing power of the ferric ions.

COPYRIGHT: (C)2008,JPO&INPIT


Inventors:
Yoshifumi Abe
Koji Hosaka
Application Number:
JP2007086983A
Publication Date:
March 02, 2011
Filing Date:
March 29, 2007
Export Citation:
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Assignee:
jx Nippon Mining & Metals Co., Ltd.
International Classes:
C22B11/00; C22B3/04
Domestic Patent References:
JP2005298850A
JP2006512484A
JP2005523992A
Foreign References:
US4551213
US4668289
Attorney, Agent or Firm:
Axis International Patent Business Corporation