发明名称 |
METHOD FOR RECOVERING GOLD |
摘要 |
The invention relates to a method for recovering gold from an intermediate product or residue containing sulphur and iron generated in the leaching of a sulphidic raw material. The recovery of gold and the other valuable metals in the raw material takes place in a chloride environment. The gold contained in the intermediate product or residue is leached with divalent copper and chlorine in a copper (11) chloride - sodium chloride solution in conditions where the oxidation-reduction potential is in the range of 650-750 mV and the pH between 1 and 1.6. The acid generated during the feed of chlorine is neutralized with a suitable alkali. Neutralization avoids the costs of dissolving the iron. |
申请公布号 |
EA009726(B1) |
申请公布日期 |
2008.02.28 |
申请号 |
EA20060001774 |
申请日期 |
2005.04.25 |
申请人 |
OUTO TEC. OYJ |
发明人 |
HAMALAINEN MATTI;HYVARINEN OLLI |
分类号 |
C22B3/10;C22B;C22B11/00;C22B11/06 |
主分类号 |
C22B3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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