Title:
METHOD FOR RECOVERING GOLD FROM AN ORE OR A REFINING INTERMEDIATE CONTAINING GOLD
Document Type and Number:
WIPO Patent Application WO/2017/170960
Kind Code:
A1
Abstract:
An object of the present invention is to provide a method for recovering gold in an ore or a refining intermediate by sufficiently leaching gold in a raw material resulting from the ore or the refining intermediate in an acidic solution containing a copper ion, an iron ion and a halide ion, which can contribute to improve the recovery rate of gold. Provided is a method for recovering gold from an ore or a refining intermediate containing gold, the method comprising a step of contacting a gold-containing raw material obtained from the ore or the refining intermediate with an acidic solution containing a copper ion, an iron ion and a halide ion while supplying an oxidizing agent to leach the gold component in the raw material, and the halide ion in the acidic solution comprising at least a bromide ion, wherein the concentration of the bromide ion in the acidic solution is 100 g/L or more or the concentration of the bromide ion in the acidic solution is less than 100 g/L, and wherein when the concentration of the bromide ion is less than 100 g/L, a concentration ratio of the halide ions in the acidic solution is such that a ratio of the concentration of the chloride ion to the concentration of the bromide ion (a Cl/Br concentration ratio) is 1/3 or less.
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Inventors:
YOSHIMURA AKIRA (JP)
ABE YOSHIFUMI (JP)
ABE YOSHIFUMI (JP)
Application Number:
PCT/JP2017/013456
Publication Date:
October 05, 2017
Filing Date:
March 30, 2017
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
C22B3/10; C22B3/00; C22B11/00
Foreign References:
| AU2012244197A1 | 2013-06-13 | |||
| AU2014245390A1 | 2015-10-22 | |||
| CA1340169C | 1998-12-08 | |||
| US20090241735A1 | 2009-10-01 | |||
| AU2013204508A1 | 2014-03-20 | |||
| JP2009526912A | 2009-07-23 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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