Title:
METHOD FOR LEACHING GOLD FROM GOLD ORE CONTAINING PYRITE
Document Type and Number:
WIPO Patent Application WO/2014/038236
Kind Code:
A1
Abstract:
The present invention improves the leaching speed of gold while also inhibiting the generation of sulfur dioxide in a method for leaching gold from gold ore containing pyrite without using highly poisonous chemicals such as cyanogen, thiourea, thiosulfuric acid, and halogen gas. A method for leaching gold involving: pre-treatment steps which include a step (1) for preparing a gold ore containing pyrite and a step (2) for heating the gold ore to 450°C or higher in a non-oxidizing atmosphere and for pyrolyzing the pyrite within the gold ore into iron sulfide (II) and elemental sulfur, and which does not include an oxidation roasting step; and a step (3) for leaching the gold component within the ore by bringing the gold ore that was subjected to the pre-treatment steps into contact with a gold leaching solution containing chloride ions, bromide ions, and iron ions while an oxidizing agent is supplied.
Inventors:
HATANO KAZUHIRO (JP)
AOTO YUKI (JP)
KATSUKAWA KOJI (JP)
AOTO YUKI (JP)
KATSUKAWA KOJI (JP)
Application Number:
PCT/JP2013/060797
Publication Date:
March 13, 2014
Filing Date:
April 10, 2013
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
C22B11/00; C22B1/02; C22B3/04
Foreign References:
| JP2009235525A | 2009-10-15 | |||
| JP2009526912A | 2009-07-23 | |||
| JPH07508073A | 1995-09-07 |
Other References:
DUNN, J. G. ET AL.: "PYROLYSIS OF ARSENOPYRITE FOR GOLD RECOVERY BY CYANIDATION", MINERALS ENGINEERING, vol. 8, no. 4/5, 1995, pages 459 - 471
Attorney, Agent or Firm:
AXIS Patent International (JP)
Axis international patent business corporation (JP)
Axis international patent business corporation (JP)
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