Title:
A way gold from the gold ore stone containing a sulfide of iron oozes
Document Type and Number:
Japanese Patent JP5955393
Kind Code:
B2
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:
Kazuhiro Hatano
Yuki Aoto
Koji Katsukawa
Yuki Aoto
Koji Katsukawa
Application Number:
JP2014534212A
Publication Date:
July 20, 2016
Filing Date:
April 10, 2013
Export Citation:
Assignee:
JX Nippon Mining & Metals Co., Ltd.
International Classes:
C22B11/00; C22B1/02; C22B3/10
Domestic Patent References:
| JP2009235525A | ||||
| JP2008106347A | ||||
| JP2005042155A |
Other References:
DUNN, J. G. et al.,PYROLYSIS OF ARSENOPYRITE FOR GOLD RECOVERY BY CYANIDATION,Minerals Engineering,1995年,vol.8, No.4/5,p. 459-471
Attorney, Agent or Firm:
Axis International Patent Business Corporation