A fungal pre-oxidation method for dual refractory gold ores containing arsenic and carbon

A double intractable, pre-oxidation technology, applied in the direction of improving process efficiency, can solve the problems of complex process, improper control, harsh carbonaceous material ashing conditions, etc., to simplify the process flow, save production costs, and maintain competitive advantages. Effect
CN103820641BActive Publication Date: 2016-04-06NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2016-04-06

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Abstract

The purpose of this invention is that since the two-step biological oxidation method for treating double refractory gold ores has the disadvantages of long process, complex technology, and high production cost, there is an urgent need for a method that can effectively treat arsenic sulfide and gold-containing carbonaceous matter in gold ores. Methods. The invention provides a fungal pre-oxidation method for arsenic-containing and carbon-containing double refractory gold mines. The method utilizes Phanerochaete? chrysosporium-CCTCC? M2013616) to amplify the culture, and then combines nitrogen-limited medium and gold ore powder. and fungal liquid were added to a biological oxidation constant-temperature mixer for non-sterile oxidative degradation for 5 to 15 days. The arsenic and carbon contents in the gold ore powder were significantly reduced. The pretreated fungal oxidation residue is used to extract gold by conventional cyanidation method. The cyanide gold extraction rate of gold ore powder is increased from about 10% to more than 89%, achieving one-step oxidation pretreatment of double refractory gold ores containing arsenic and carbon. , the economic benefits are very significant.
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Description

technical field

[0001] The invention belongs to the technical field of biometallurgy, in particular to a microbial pre-oxidation method for double refractory gold ores containing arsenic and carbon. Background technique

[0002] Arsenic-containing and carbon-containing double refractory gold mines refer to a type of gold mines containing arsenic-containing sulfides and gold-robbing carbonaceous substances, and the gold recovery rate is very low. This type of gold mines is distributed in China, the United States, Australia, Russia and other parts of the world . In refractory gold ores containing arsenic and carbon, gold is often disseminated in sulfide minerals such as arsenopyrite, pyrite, and chalcopyrite in the form of micro-submicroscopic or even lattice gold, which affects the relationship between gold and leaching. Effective exposure of the gold reagent. Carbonaceous substances affecting gold leaching in refractory gold ores mainly include elemental carbon, organic ac...

Claims

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