Biological gold extraction process of antimony-bearing complex refractory gold ore and microorganism used in same

A technology of microorganisms and gold mines, which is applied in the biological gold extraction process and the field of microorganisms used, can solve the problems of large consumption of sodium cyanide and low gold extraction rate, and achieve the advantages of reduced adsorption activity, wide temperature resistance range, and significant economic benefits Effect
CN104531990AInactive Publication Date: 2015-04-22招金矿业股份有限公司技术中心
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
招金矿业股份有限公司技术中心
Publication Date
2015-04-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a biological gold extraction process of antimony-bearing complex refractory gold ore and a microorganism used in the process. The process comprises the following steps: inoculating bacteria with an accession number of CCTCC NO: M2014120 in a 9K culture medium for culture; adding antimony-bearing complex refractory gold ore into the bacterial culture solution, performing bacterial oxidation pretreatment at 25-55 DEG C and at a pH of 0.6-2.2 while injecting air with an injection rate of 0.1-0.4 m3 / h and stirring at a stirring speed of 600-1000 rmp, performing oxidation for 4-8 days; after bacterial oxidation, performing solid-liquid separation, adding water into bacterial oxidation residues to obtain residue slurry with a pH value being adjusted to 9-11, and adding sodium cyanide for cyaniding at a pH value of 10-11 for 24-48 hours. The process of the invention makes full use of antimony-bearing complex refractory gold ore resources, has a gold leaching rate of up to more than 90%, saves the cost, improves the profit, and is green and environment-friendly.
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Description

technical field

[0001] The invention relates to a biological gold extraction process of antimony-containing complex refractory gold ore and microorganisms used, and belongs to the technical field of biometallurgy. Background technique

[0002] my country is the world's major gold producer and consumer. In my country's gold resource reserves, there are many types of gold mines, most of which are refractory resources. Antimony-containing complex gold ore is a typical extremely difficult-to-leach gold ore. The reason why it is difficult to leach is that the mineral composition of this type of ore is complex, such as pyrite, stibnite, arsenopyrite, realgar, orpiment, carbon During the process of cyanide leaching gold, the stibnite consumes a large amount of oxygen and free cyanide in the leaching solution, and forms a secondary antimony salt film on the surface of the gold particles, which hinders the leaching of gold; at the same time, the ore contains Carbon-containing subst...

Claims

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