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Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content

A technology for copper sulfide ore and copper sulfide, which is applied in the direction of improving process efficiency, can solve the problems of high grade requirements, loss of activity, and high cost of selected ore, and achieves the goal of reducing the grade of selected ore, reducing production costs and increasing costs. Effect

Inactive Publication Date: 2009-04-08
CHINA NERIN ENG
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  • Abstract
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Problems solved by technology

Although smelters will take various measures to deal with arsenic, a small amount of arsenic still enters the atmosphere at the current technical level. Because the toxic effect of arsenic in animals is mainly combined with the enzyme system in cells, the biological effects of many enzymes are affected. Inhibition inactivation, resulting in metabolic disorders
Treating copper ore with high arsenic content by traditional dressing and smelting process will inevitably result in high cost of damaging the environment, and has higher requirements on the grade of the selected ore. Therefore, it is necessary to find a new process

Method used

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  • Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content

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Embodiment 1

[0012] This new process was first applied in a secondary copper sulfide mine with high arsenic content in Fujian in China, and a large-scale industrial production plant was built and put into operation at the end of 2005. The production practice shows that the technology is advanced, the cost is low, and the economic, social and environmental benefits are remarkable. The metal minerals in the ore are dominated by sulfides. Except for pyrite, the metal sulfides are mainly copper sulfides. 16 kinds of copper sulfides have been found, including blue chalcocite, copper blue, and chalcocite , Chalcocite accounts for more than 99.26%, followed by chalcocite, bornite, etc., and other copper metal sulfides are very small.

[0013] Non-metallic minerals are mainly quartz, followed by dickite, alunite, sericite, a small amount of barite, feldspar, muscovite, chlorotopaz, etc.

[0014] The main harmful element in the ore is arsenic. There are about 8 kinds of arsenic compounds and arse...

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Abstract

The invention discloses a dump leaching technique of ground organism of secondary copper sulphide ore with high content of arsenic. The technique comprises the following steps: the secondary copper sulphide ore with high content of arsenic is crushed to 10 to 30mm, and acid mine water of mineral-leaching microorganism with thiobacillus ferrooxidans and thiobacillus thiooxidans is used for leaching the secondary copper sulphide ore with high content of arsenic; while most of the arsenic in the ore is still in leaching residue and a small part of the arsenic is in the leachate, faffinated and electrodeposition liquid; but closed cycle in the production has no effect on the extraction and electrodeposition and standard cathode copper product, thus avoiding the hazard of the arsenic to the environment. The technique has short process, little investment, low cost and energy consumption, no pollution and high rate of recovery, can process the copper ore with high content of arsenic which can not be processed by the traditional smelting technique, and also can process the secondary copper sulphide ore with high content of arsenic and similar secondary copper sulphide ore with high content of arsenic so as to expand the utilization range of resources.

Description

technical field [0001] The invention relates to a surface biological heap leaching process of secondary copper sulfide ore, in particular to a surface biological leaching process of secondary copper sulfide ore with high arsenic content (0.035%) in raw ore. Background technique [0002] According to the technical conditions of dressing and smelting, copper ore is divided into three natural types according to the ratio of copper oxide and copper sulfide. That is, sulfide ore, containing less than 10% copper oxide; oxidized ore, containing more than 30% copper oxide; mixed ore, containing 10% to 30% copper oxide. The order of spatial distribution of various ores in the deposit is generally that the oxide ore is in the upper part of the deposit, which is caused by the long-term weathering of the sulfide ore, and the mixed ore is down, and the sulfide ore is located in the lower part of the deposit because it is far away from the surface. Copper oxide ore is difficult to recove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 王莉萌袁国才胡根华肖春莲李春林杨松
Owner CHINA NERIN ENG
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