发明授权
- 专利标题: Method for leaching gold
- 专利标题(中): 浸金方法
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申请号: US11896747申请日: 2007-09-05
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公开(公告)号: US07682420B2公开(公告)日: 2010-03-23
- 发明人: Yoshifumi Abe , Hiroshi Hosaka
- 申请人: Yoshifumi Abe , Hiroshi Hosaka
- 申请人地址: JP Tokyo
- 专利权人: Nippon Mining & Metals Co., Ltd.
- 当前专利权人: Nippon Mining & Metals Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2006-264423 20060928
- 主分类号: C22B11/06
- IPC分类号: C22B11/06
摘要:
In a method for leaching gold from copper sulfides, the sulfide ores are first subjected to leaching of copper, thereby producing a leaching residue having 7.9% or less of the copper content. This leaching residue is mixed with a leach liquor, which contains the chloride ion and ferric ion and has 1.9 or less of pH. Gold and copper can be effectively leached from the copper sulfide ores. Ordinarily used oxidizing reagents such as hydrogen peroxide or nitric acid are not used. The gold, copper and iron can, therefore, be leached in a single process and by using an identical leaching liquor. The rate of gold leaching reaction can be enhanced by the co-presence of either copper or bromide ion or both together with the chloride and iron ion.
公开/授权文献
- US20080078269A1 Method for leaching gold 公开/授权日:2008-04-03
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