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Pyrite selectivity inhibition technique for secondary copper sulfide mineral biological lixiviation process

A copper sulfide ore bioleaching technology, applied in the direction of microorganisms, microorganisms, process efficiency improvement, etc., can solve the problems of affecting bacterial activity, affecting copper leaching effect, copper extraction and electrodeposition efficiency reduction, etc.

Active Publication Date: 2010-05-12
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

Excessive iron concentration and excessive acid in the leach solution will not only affect the bacterial activity, hinder the smooth progress of the leaching process, and affect the leaching effect of copper, but also adversely affect the subsequent extraction process, which will bring copper extraction and electrodeposition. A series of problems such as reduced efficiency, reduced copper recovery rate, and high energy consumption

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  • Pyrite selectivity inhibition technique for secondary copper sulfide mineral biological lixiviation process
  • Pyrite selectivity inhibition technique for secondary copper sulfide mineral biological lixiviation process

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Embodiment Construction

[0032] like figure 1 As shown, 1 is the low-grade secondary copper sulfide ore crushing process; the crushed ore is sent to ore heaping and pretreatment process 2; 10-15% of the ore weight is added to the bacteria-containing raffinate in the pretreatment process, In the ore after the ore heaping and pretreatment process, the ore leaching bacteria obtained through process 9, grown and domesticated are added to the leaching process 3, the leachate from the process 3 enters the extraction process 4, and the raffinate in the process 4 is passed through the process 7 High iron precipitation and pH value adjustment, as well as the potential and temperature adjustment of process 8, return to leaching process 3 for selective leaching of copper, and the copper-containing organic phase extracted in process 4 is sent to stripping process 5 for stripping, after stripping The copper-containing rich solution enters the electrodeposition step 6 to obtain electrodeposited copper.

[0033] Th...

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Abstract

The invention relates to a pyrite selective inhabitation technique for biological leaching process of secondary copper sulphide ores, wherein, a biological leaching system with low PH value and low electric potential is reached by utilization of leaching bacteria containing Thiobacillus ferrooxidans Retech III (T.F.R.III leaching bacteria for short) (has been collected in China Center for Type Culture Collection (in Wuhan University) and has a collection registration number of CCTCC No:M200033) and adoption of two spraying methods of phased intermission and continuity and reasonable matching of bacterial activity, PH value and other conditions, and high efficiency selective leaching of the copper sulphide ores is realized. Moreover, pyrites are inhibited effectively and yield of acids andirons is reduced. After extraction of qualified lixivium after leaching, aqueous phase goes back for heap leaching, and organic phase enters into stripping procedure for treatment. The invention has the advantages of short technological flow, simple equipment, low cost, no pollution, high recovery rate, capability of processing low-grade secondary copper sulphide ore resources which are difficultto process by the prior mineral smelting technique, and improvement of comprehensive utilization rate of copper resources.

Description

technical field [0001] The invention relates to a process of selectively suppressing pyrite leaching in the leaching process of low-grade secondary copper sulfide ore, in particular to a process of using microorganisms to oxidize copper sulfide ore under a low pH value and low potential biological leaching system , while not affecting the leaching effect of copper minerals, it can effectively inhibit the excessive leaching of pyrite and avoid the process of causing excess acid and iron in the bioheap leaching process. Background technique [0002] With the continuous development and utilization of mineral resources, high-grade and easy-to-handle ores are constantly decreasing, mineral resources are becoming increasingly depleted and complex, environmental protection pressure is increasing, and traditional metallurgical processes are facing challenges. Although the biological copper extraction process for low-grade mineral resources has been widely used at home and abroad, th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18C22B3/26C22B1/14C22B15/00C12N1/00
CPCY02P10/20
Inventor 阮仁满温建康周桂英
Owner 有研资源环境技术研究院(北京)有限公司
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