Title:
黄鉄鉱を含有する金鉱石からの金の浸出方法
Document Type and Number:
Japanese Patent JP5832665
Kind Code:
B2
Abstract:
The present invention provides a method for leaching gold from gold ore containing pyrite. There is provided A method for leaching gold comprising: a pretreatment stage including: a step 1 of preparing gold ore containing pyrite and a step 2 of heating the gold ore under an inert atmosphere to 450°C or more to pyrolyze the pyrite in the ore into iron (II) sulfide and elemental sulfur; a solid-liquid separation step 3 of contacting the pretreated gold ore with an iron-leaching solution containing one or more selected from sulfuric acid, hydrochloric acid and an aqueous Fe 3+ salt solution to leach iron component contained in the ore, and thereafter subjecting the resulting solution to a solid-liquid separation to obtain post iron-leaching solution and residue; a leaching step 4 of contacting the residue from the step 3 with a gold-leaching solution containing halide ions, copper ions, and iron ions while supplying an oxidizing agent, to leach gold component contained in the residue; and an iron-leaching solution regeneration step 5 of precipitating and removing the iron component from the post iron-leaching solution obtained in step 3 as a form of oxyiron hydroxide.
Inventors:
Kazuhiro Hatano
Yuki Aoto
Koji Katsukawa
Yuki Aoto
Koji Katsukawa
Application Number:
JP2014545997A
Publication Date:
December 16, 2015
Filing Date:
April 10, 2013
Export Citation:
Assignee:
jx Nippon Mining & Metals Co., Ltd.
International Classes:
C22B11/00; C22B1/02; C22B3/04
Domestic Patent References:
| JP2005042155A | 2005-02-17 | |||
| JP2012184462A | 2012-09-27 | |||
| JP2009526912A | 2009-07-23 | |||
| JP2005042155A | 2005-02-17 | |||
| JP2012184462A | 2012-09-27 | |||
| JP2009526912A | 2009-07-23 |
Other References:
JPN6013031165; ＤＵＮＮ， Ｊ． Ｇ． ｅｔ ａｌ．: 'ＰＹＲＯＬＹＳＩＳ ＯＦ ＡＲＳＥＮＯＰＹＲＩＴＥ ＦＯＲ ＧＯＬＤ ＲＥＣＯＶＥＲＹ ＢＹ ＣＹＡＮＩＤＡＴＩＯＮ' Ｍｉｎｅｒａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｖｏｌ．８， Ｎｏ．４／５, 1995, ｐ． ４５９-４７１
JPN6013031165; ＤＵＮＮ， Ｊ． Ｇ． ｅｔ ａｌ．: 'ＰＹＲＯＬＹＳＩＳ ＯＦ ＡＲＳＥＮＯＰＹＲＩＴＥ ＦＯＲ ＧＯＬＤ ＲＥＣＯＶＥＲＹ ＢＹ ＣＹＡＮＩＤＡＴＩＯＮ' Ｍｉｎｅｒａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｖｏｌ．８， Ｎｏ．４／５, 1995, ｐ． ４５９-４７１
JPN6013031165; ＤＵＮＮ， Ｊ． Ｇ． ｅｔ ａｌ．: 'ＰＹＲＯＬＹＳＩＳ ＯＦ ＡＲＳＥＮＯＰＹＲＩＴＥ ＦＯＲ ＧＯＬＤ ＲＥＣＯＶＥＲＹ ＢＹ ＣＹＡＮＩＤＡＴＩＯＮ' Ｍｉｎｅｒａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｖｏｌ．８， Ｎｏ．４／５, 1995, ｐ． ４５９-４７１
Attorney, Agent or Firm:
Axis International Patent Business Corporation