Title:
鉱物からの金属の回収方法
Document Type and Number:
Japanese Patent JP4468999
Kind Code:
B2
Abstract:
The copper sulfide ore is leached in the halide bath without using a special oxidant but with the use of only air. The copper and gold in the copper sulfide ore can be leached at high leaching ratio. The treating steps are as follows. (1) Copper leaching process (CL). The raw material is charged into the first acidic aqueous solution, which contains cupric chloride, ferric chloride, 7 g/L of hydrochloric acid, and sodium chloride. The post-leach liquor contains copper in cuprous state ions and copper in cupric state ions. (2) Solid-Liquid separation step. The resultant solid and liquid of CL step are separated. (3) Air oxidation step (OX). Air is blown into the post solid-liquid separation liquor. The copper in cuprous state ions are oxidized to the copper in cupric state ions. The iron leached in the step (1) is oxidized. Simultaneously, the impurities leached in the step (2) are precipitated. (4) Copper extracting step (CEX). The copper is recovered from the post-liquor of the step (3) (5) Gold recovering step (AL). The residue separated in the step (2) is added to the leach liquor similar to that of the step (1). The steps (1) and (5) are carried out under the atmospheric pressure and at the temperature of boiling point or lower, while blowing air into the leach liquor.
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Inventors:
Yoshifumi Abe
Koji Hosaka
Kazuaki Takebayashi
Yasuya Ishiguro
Yoshimura Akira
Koji Hosaka
Kazuaki Takebayashi
Yasuya Ishiguro
Yoshimura Akira
Application Number:
JP2008084597A
Publication Date:
May 26, 2010
Filing Date:
March 27, 2008
Export Citation:
Assignee:
Nikko Metal Co., Ltd.
International Classes:
C22B15/00; C22B3/04; C22B3/20; C22B3/42; C22B3/44; C22B11/00
Domestic Patent References:
| JP2009526912A |
Attorney, Agent or Firm:
Takuo Murai