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Process for treating high arsenic high carbon gold mine

A processing technology and high-carbon technology, applied in the field of mineral processing, high-arsenic and high-carbon gold ore processing technology, can solve the problems of high processing cost, only 10-50%, high cyanide consumption, prolong the number of cycles, improve poor Influence and improve the effect of recovery rate

Inactive Publication Date: 2005-10-19
莱州泰源冶金技术有限公司
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Problems solved by technology

At present, in the pretreatment technology of refractory gold ore resources, various processes such as oxidation roasting, arsenic-fixing sulfur-fixing roasting, pressurized oxidation, bacterial oxidation and chlorination oxidation have been successfully developed, but these processes are only for a single arsenic-containing Gold mines or carbon-containing gold mines are suitable. Many gold mines and associated gold mines in my country contain impurities such as arsenic, organic carbon, and antimony, and the gold content is low. It is often difficult to treat them with the above-mentioned processes because of environmental pollution and high processing costs. Large-scale industrial production and application, if the traditional cyanide gold extraction method is used for this kind of ore, not only the consumption of cyanide is high, the production cost is high, but also the gold leaching rate is very low, and the direct gold cyanide leaching rate is generally only 10-50%

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  • Process for treating high arsenic high carbon gold mine

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[0015] specific implementation plan

[0016] Take an arsenic-containing high-carbon ore in Kazakhstan containing about 3% arsenic and 8-10% carbon as an example, adjust the pulp concentration to 15-25%, pH=1-2, and control the growth temperature between 37-45°C , put in the mixed bacteria of Thiobacillus ferrooxidans, Thiobacillus thiooxidans, Helicobacter ferrooxidans and heat-resistant Thiobacillus oxidans, the bacteria use the sulfur and iron in the minerals as food and reproduce, under the action of bacteria, the minerals Sulfur, iron, arsenic, etc. in the liquid are oxidized, the gold-encased minerals are destroyed and dissociated, and the arsenic-containing minerals are decomposed and transformed into the liquid, and then transformed into stable iron arsenate and calcium arsenate that are non-polluting to the environment after neutralization. Precipitation, gold minerals still exist in a solid state and are exposed, and the carbonaceous substances that adsorb gold are pa...

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Abstract

The process of treating high arsenic and high carbon gold ore includes the first bacteria oxidation, in which bacteria propagate with sulfur and iron in ore as food under condition suitable for microbe to grow, so as to dissociate the gold coating mineral and expose gold; and the subsequent reinforced carbon soaking and cyaniding after adding additive into the mineral slurry to destroy organic carbon compound and inorganic carbon compound in mineral and inhibit covering. The present invention has active carbon using life, greatly raised gold recovering rate and other advantages, and can treating gold ore with As content as high as 8 % and carbon content as high as 10 % to reach gold leaching rate up to 90 %.

Description

technical field [0001] The invention relates to a process for treating high-arsenic and high-carbon gold ore, which belongs to mineral processing technology. Background technique [0002] Among the proven gold reserves in my country, 30% are refractory gold mines, and the prospective reserves of refractory gold mines are more than 1,000 tons. With the massive mining of easy-to-treat ores, the development and utilization of refractory gold ore resources has become an important task of gold mining. At present, in the pretreatment technology of refractory gold ore resources, various processes such as oxidation roasting, arsenic-fixing sulfur-fixing roasting, pressurized oxidation, bacterial oxidation and chlorination oxidation have been successfully developed, but these processes are only for a single arsenic-containing Gold mines or carbon-containing gold mines are suitable. Many gold mines and associated gold mines in my country contain impurities such as arsenic, organic car...

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Application Information

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IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 公锡泰张耀军仲维功田立国于文明何勇军张范新
Owner 莱州泰源冶金技术有限公司
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