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Biological heap leaching technology for stripmining copper sulfide mines

A technology for copper sulfide ore and biological heap, which is applied in the direction of improving process efficiency, can solve the problems of difficult to realize rational utilization of copper-containing waste rock resources, low copper-containing grade, and high oxidation degree, and achieves easy access, short process and high technological simple effect

Active Publication Date: 2014-11-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

Due to the low copper grade and high degree of oxidation of the open-pit stripped copper-bearing waste rock, it is difficult to realize the rational utilization of this part of the copper-bearing waste rock resources by using traditional treatment technologies

Method used

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  • Biological heap leaching technology for stripmining copper sulfide mines

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Embodiment 1

[0020] A large-scale copper mine in China used open-pit mining in the early days. There are 250 million tons of open-pit stripped copper-bearing waste ores, the average copper grade is 0.229%, and the amount of copper metal is 554,000 tons. The main metal minerals in copper-bearing waste rocks are pyrite, followed by chalcopyrite, with a small amount of hematite, limonite, chalcocite, blue chalcocite, bornite, sphalerite and galena , copper blue, etc. The main gangue minerals in copper-bearing waste rocks are quartz, chlorite, mica, kaolinite, etc. After years of oxidation and alteration, and some oxidized ores were piled up in the waste rock during the stripping operation, the oxidation degree of copper ore minerals in the copper-bearing waste rock in the waste rock field has increased, and the average oxidation rate is about 5%. .

[0021] like figure 1 As shown, the bioheap leaching process includes the following steps:

[0022] (1) Bacteria selection, domestication and...

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Abstract

The invention provides a biological heap leaching technology for stripmining copper sulfide mines. The technology comprises the following steps: the copper sulfide mines with a low copper grade and high oxidizability are crushed, sieved and heaped, water and dilute sulphuric acids are dripped and sprinkled successively, a pH value is adjusted, then normal-temperature acidophile and middle-temperature acidophile are dripped and sprinkled successively according to temperature changes, and copper in leach liquor is displaced. The technology has the advantages that the technology is simple, the technological process is short, the pollution is small, the copper sulfide mines with a lower grade can be processed, and the like. Mineral leaching bacteria which are adopted are widely distributed, so that the mineral leaching bacteria are easy to obtain.

Description

technical field [0001] The invention relates to the technical field of biometallurgy, in particular to a biological heap leaching process for stripping copper sulfide ore in the open air. Background technique [0002] Early domestic copper mining often used open-pit mining. For example, a large-scale copper mine used open-pit mining. There are currently 250 million tons of open-pit stripped copper-bearing waste rocks, with an average copper grade of 0.229% and a copper metal content of 554,000 tons. After years of oxidation and alteration, and some oxidized ores were piled up in the waste rock during the production and stripping process, the oxidation degree of copper ore minerals in the copper-bearing waste rock in the waste rock field has increased, with an average oxidation rate of 5%. about. [0003] The traditional copper sulfide ore treatment technology obtains copper concentrate through flotation enrichment, and then produces copper through pyromelting-electrolytic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B15/00
CPCY02P10/20
Inventor 张析王进龙余江鸿吉鸿安安俊涛舒荣波陈蓉高幼珍
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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