Rotational flow desulfurization technology for leaching residues of chalcopyrite
A desulfurization process and chalcopyrite technology, applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems of poor safety, complicated recycling process equipment, uneconomical, etc., and achieve low power consumption and simple process , the effect of low operating costs
Active Publication Date: 2016-01-20
SHANDONG UNIV OF SCI & TECH
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[0008] In order to overcome the shortcomings of the existing chalcopyrite leaching slag desulfurization process, such as complex recovery process equipment, poor safety, and uneconomical, the present invention provides a brass leaching process that is superior in safety and economy under the premise of ensuring recovery efficiency. Ore leaching slag cyclone desulfurization process
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[0018] The technical scheme of the present invention will be further described below with reference to the drawings and a specific embodiment. In order to comprehensively illustrate the effect of the recovery process of the present invention, a complete atmospheric pressure chemical oxidation leaching process is given in the specific implementation.
[0019] A copper smelter in Jilin uses atmospheric chemical oxidation leaching-gravity separation desulfurization-copper extraction electrowinning process to process chalcopyrite concentrate obtained from beneficiation, with a processing capacity of 150t / d. The chalcopyrite concentrate is first subjected to atmospheric pressure chemical oxidation leaching, and the leaching conditions are: pulp concentration 16%, initial H 2 S0 4 Concentration 42g / L, initial NaCl concentration 30g / L, particle size -325 mesh 88~90%, reaction temperature 90℃, stirring linear speed 4.40m / s, reaction time 16 hours, oxygen filling capacity 240Nm 3 / t, the le...
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The invention discloses a rotational flow desulfurization technology for leaching residues of chalcopyrite. According to the rotational flow desulfurization technology, evenly-mixed chalcopyrite is directly fed into a shaker to be roughly selected; light products are fed into a hydrocyclone to be finely selected through a pump; overflow and underflow of the hydrocyclone are obtained; shaker heavy products and the hydrocyclone underflow are combined to be subject to the countercurrent washing technology; a cleaning solution obtained after washing is subject to the extraction-electrodeposition copper extracting technology; washing residues are abandoned; the hydrocyclone overflow enters a thickener to be subject to first-stage dehydration; thickener underflow enters a filter press to be subject to second-stage dehydration; thickener overflow and filter filtrate are combined and then is directly subject to the extraction-electrodeposition copper extraction technology; and a filter cake of the filter is a high-quality elemental sulfur resource. According to the rotational flow desulfurization technology for the leached residues of chalcopyrite, the hydrocyclone and the shaker are combined together, no medicaments or floatation machines are needed, the elemental sulfur is extracted from copper leaching residues, the technology is simple, investment is low, the power consumption is low, the operation cost is low, and on the premise of ensuring the recovery efficiency, safety and the economical efficiency are better optimized.
Description
Technical field [0001] The invention relates to a desulfurization process of chalcopyrite leaching residue, in particular to a separation technology for removing elemental sulfur from the leaching residue of the chalcopyrite normal pressure chemical oxidation leaching process. Background technique [0002] The traditional method used to extract copper from chalcopyrite is mainly pyrometallurgical smelting. However, pyrometallurgical copper smelting has the disadvantages of large investment, high cost, and serious pollution, which is increasingly incompatible with the requirements of sustainable development. [0003] In this context, the research on hydrometallurgical copper smelting technology has been greatly developed. Metallurgists in various countries have paid more and more attention to the research and development of the hydrometallurgical copper smelting process of chalcopyrite. The copper process mainly includes atmospheric chemical oxidation leaching process (using ferric ...
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IPC IPC(8): C22B3/22C22B3/26C22B15/00C25C1/12
CPCY02P10/20
Inventor 李琳吴雷由晓芳吕宪俊
Owner SHANDONG UNIV OF SCI & TECH