Title:
ATMOSPHERICALLY CATALYZING AND OXIDIZING METHOD OF REFRACTORY GOLD CONCENTRATE WITH HIGH ARSENIC AND HIGH SULFUR
Document Type and Number:
WIPO Patent Application WO/2009/149590
Kind Code:
A1
Abstract:
An atmospherically catalyzing and oxidizing method of refractory gold concentrate with high arsenic and high sulfur, comprises ① adding predefined ore, solid catalyst, acid and water into reaction container with stirrers to form ore pulp; ② continuously introducing gas oxidizer such as ozone and oxygen, or ozone and air into the pulp at 60-100℃, continuously stirring the mixture to form oxidized ore pulp, reacting for 6 to 18 hrs, then cooling to room temperature and filtering; ③In accordance with traditional extracting and filtering process, mixing the residue from the filtering step with calcium hydroxide solution to regulate its pH value to 11～12, adding sodium cyanide, stirring for 24 hrs, and filtering to extract noble metals from filtrate. The method improves the extraction rate of noble metals such as gold and silver in the refractory gold concentrate while reducing the environment pollution.
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Inventors:
LI DENGXING (CN)
Application Number:
PCT/CN2008/001924
Publication Date:
December 17, 2009
Filing Date:
November 25, 2008
Export Citation:
Assignee:
UNIV DONGHUA (CN)
International Classes:
C22B3/06; C22B3/08; C22B3/10; C22B11/08
Foreign References:
| US4647307A | 1987-03-03 | |||
| US5071477A | 1991-12-10 | |||
| CN100371478C | 2008-02-27 | |||
| CN1004426B | 1989-06-07 | |||
| CN1904094A | 2007-01-31 |
Other References:
LI JUNMENG: "The Current Status and Development Tendency of Pretreation Process for ores", HYDROMETALLURGY OF CHINA, vol. 22, no. 1, March 2003 (2003-03-01), pages 1 - 8
TONG LINLIN ET AL.: "Experimental Investigation on Gold Extraction from High-As Concentrate in Human Province Through Bio-Oxidation/Cyanadation", PRECIOUS METALS, vol. 29, no. 1, February 2008 (2008-02-01), pages 15 - 18
LI WANQUAN ET AL.: "Bio-Oxidation Pretreatment of High Arsenic High Sulfur Refractory Gold Concentrate", METAL MINE, February 2007 (2007-02-01), pages 42 - 44, 65
TONG LINLIN ET AL.: "Experimental Investigation on Gold Extraction from High-As Concentrate in Human Province Through Bio-Oxidation/Cyanadation", PRECIOUS METALS, vol. 29, no. 1, February 2008 (2008-02-01), pages 15 - 18
LI WANQUAN ET AL.: "Bio-Oxidation Pretreatment of High Arsenic High Sulfur Refractory Gold Concentrate", METAL MINE, February 2007 (2007-02-01), pages 42 - 44, 65
Attorney, Agent or Firm:
SHANGHAI CO-EFFORT IPR AGENT CO., LTD. (Yiqi31F, Huaneng Union Mansion,No. 958 Lujiazui Ring Rd, Shanghai 0, CN)
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