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Method for eliminating interface emulsification during copper biochemical lixivium extraction process

A technology of bioleaching and process interface, applied in the direction of improving process efficiency, etc., can solve the problems of raffinate entrainment, interface emulsification, easy formation of iron alum precipitation, etc., and achieve the effect of improving copper extraction efficiency

Active Publication Date: 2009-06-17
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

For example, during the bioheap leaching process of a certain copper ore, due to the excessive leaching of pyrite, the concentration of iron in the leaching solution is too high, and it is easy to form ferrite precipitation, which leads to problems such as interface emulsification and raffinate entrainment during the extraction process. Pollution of the mine system affects the efficiency of bacterial leaching, and adversely affects the subsequent extraction process, affecting the extraction efficiency of copper

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  • Method for eliminating interface emulsification during copper biochemical lixivium extraction process

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Embodiment Construction

[0019] Such as figure 1 As shown, in the heap leaching process of secondary copper sulfide ore, the pretreatment process includes raffinate pretreatment process 1 before returning to the ore heap for spraying and copper leachate pretreatment process 2. In the raffinate pretreatment process before returning to the ore heap spraying, calcium carbonate is added to the raffinate after valuable metal recovery to precipitate and remove iron. In the pretreatment of copper leaching solution, the pH value of the leaching solution is adjusted by adjusting the process parameters of the leaching system, and phenylpropanamide is added to change the wettability of solid particles and the surface modification of the degradation product of the extractant, and then enter the copper solvent extraction step 3.

[0020] The present invention will be further described below in conjunction with embodiment:

[0021] Since the copper ore in a copper mine (please refer to Chinese patent: ZL02145971.1...

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Abstract

The invention relates to a method for eliminating interfacial emulsion in an extraction process of copper bio-leaching solution. The method comprises the following steps: calcium carbonate is added to raffinate for sprinkling on a returned bing for precipitating ferric iron in the purification processes of the bio-leaching solution and the raffinate, a pH value of the bio-leaching solution is controlled by adjusting leaching system technological parameters, and the generation of ferric alum precipitation can be effectively controlled; a proper amount of hydrocinnamamide is added to prevent amphiphilic substances such as solid particles, and extractant degradation product and the like in the leaching solution from entering an extraction system, thus effectively eliminating the interfacial emulsion in the extraction process. The technological method is applicable to a pretreatment process of the copper leaching solution and the raffinate, has no emulsion when purified feed liquid is treated by extraction separation, reduces the consumption of raw materials such as the extractant and the like, improves the copper extraction efficiency and solves the problem of the interfacial emulsion in the extraction process.

Description

technical field [0001] The present invention relates to a method for eliminating interface emulsification in the extraction and separation process of copper-containing biological leaching solution, in particular to a pretreatment method (also known as purification) before extraction of copper leaching solution, the purified feed liquid The generation of emulsion is reduced during extraction and separation, thereby reducing the entrainment of raffinate, saving the consumption of raw materials such as extraction agent, and improving the extraction efficiency of copper. Background technique [0002] With the continuous development and utilization of mineral resources, solvent extraction has been widely used in industry for the separation and enrichment of substances, but there is no good solution for the interface emulsification and raffinate entrainment in the solvent extraction process. The method is to often extract the emulsion from the clarification tank, and use a centrif...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B3/18C22B15/00
CPCY02P10/20
Inventor 周桂英黄松涛温建康武彪李玲
Owner 有研资源环境技术研究院(北京)有限公司
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