Acid washed ore leaching process for low-grade copper oxide ores with high mud content

A copper oxide ore, low-grade technology, applied in the field of copper hydrometallurgy, can solve the problems of low copper leaching rate, poor permeability of heap leaching, etc., and achieve the effect of less environmental pollution, low cost and low investment

Inactive Publication Date: 2010-06-16
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of acidic ore washing and leaching process for low-grade high-silt copper oxide ore. Removing part of the alkaline gangue that is easy to dissolve further solves the problems of poor heap leaching permeability and low copper

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  • Acid washed ore leaching process for low-grade copper oxide ores with high mud content
  • Acid washed ore leaching process for low-grade copper oxide ores with high mud content

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Embodiment Construction

[0028] Such as figure 1 As shown, the raw ore is crushed and screened, the ore with a grain size of +50mm is sent to the stockyard for stacking, the ore with a grain size of -50mm is processed by the ore washing system, and the placer with a grain size of +0.074mm is sent to the stockyard for stacking, - The mud ore with a particle size of 0.074mm enters the stirring and leaching process. The leachate from agitation leaching and heap leaching are combined and then enter the extraction electrowinning process to finally obtain cathode copper products.

[0029] The present invention will be further described below in conjunction with embodiment:

[0030] This process is applied to a low-grade copper oxide ore with high mud content in the western region of my country. The copper oxide minerals are mainly malachite, blue copper ore, a small amount of bileite and black copper ore; the gangue minerals are mainly clay Minerals, feldspar alterations and a small amount of sericite and ...

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Abstract

The invention provides an acid washed ore leaching process for low-grade copper oxide ores with high mud content, which comprises the following steps: after the raw ores are crushed and sieved, conveying the ores of +50mm size fraction to a storage yard for stacking, and carrying out acid washed ore treatment on the ores of -50mm size fraction; by adding sulfuric acid into the washing liquid, rewashing the ores to remove partial basic gangue; after the washing liquid is separated and deposited, recycling the acid liquid; after the ores are treated by an acid washed ore system, conveying the sand ores of +0.074mm size fraction to the storage yard for stacking, and stirring and leaching the mud ores of -0.074mm size fraction; after the leaching liquid generated by stirring and the leaching liquid generated by heap leaching are mixed, carrying out extracting and electrodepositing processes; and finally, obtaining cathode copper products. The process of the invention has the advantages of short procedures, simple equipment, small investment, low cost and little pollution to the environment, further solves the problems of poor heap leaching penetrability, low copper leaching rate and the like caused by existence of mud ores and dissolution and deposition of basic gangue, improves the recovery rate of copper, and comprehensively utilizes the mineral resources of the low-grade copper oxide with high mud content.

Description

technical field [0001] The invention relates to the technical field of copper hydrometallurgy, in particular to an acidic ore washing and leaching process, which can effectively recover copper ions in low-grade high-mud copper oxide ore. Background technique [0002] There is a relatively large proportion of low-grade copper oxide ore in my country's copper ore resources. This type of mineral generally has the characteristics of high oxidation rate, fine embedded particle size, large mud content, and complex symbiosis of multiple metals. Acidic leaching-extraction- Compared with the conventional dressing and smelting technology, the electrowinning process will obtain better technical and economic indicators for this kind of ore. However, copper oxide ore is often mixed with a certain degree of mud and water. When the ore contains too much mud and water, it will have an adverse effect on the leaching process. The ore slime will block the feeding bin, funnel and crushing equipm...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B15/00
CPCY02P10/20
Inventor 武名麟武彪臧宏李岩
Owner 有研资源环境技术研究院(北京)有限公司
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