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Technology for efficiently and selectively separating zinc in zinc sulfide concentrate

A zinc sulfide concentrate and selective technology, which is applied in the direction of photographic process, photographic auxiliary process, process efficiency improvement, etc., can solve the problems of increased purification process, large consumption, increased production cost, etc., and achieve simplified process and equipment, Effects of resource saving and process strengthening

Active Publication Date: 2016-05-25
XIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the leaching solution obtained after pressurized leaching is treated by conventional zinc electrowinning method. Since traditional zinc electrowinning has very strict requirements on the composition of the electrolyte, it is necessary to increase the purification process (removal of impurities such as Cu, Fe, As, etc.) before electrowinning. ), the purification process needs to consume a large amount of reagents and take away part of the zinc, resulting in a substantial increase in production costs

Method used

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  • Technology for efficiently and selectively separating zinc in zinc sulfide concentrate

Examples

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Effect test

Embodiment 1

[0038] Wet grind 500g of zinc sulfide concentrate (Zn16.58%; As0.13%; S31.68%; Pb3.85%; Ag26g / t; Fe12.37%) until the particle size is less than 200 mesh, and then mix it with dilute sulfuric acid , and then poured into the autoclave. During the leaching process, pure oxygen is continuously fed and the technical conditions are controlled: the concentration of sulfuric acid is 160g / L, the liquid-solid ratio is 5:1, the temperature is 140°C, the adjustment and maintenance pressure is 1.2MPa, and the stirring speed is 600r / min. , The reaction time is 2 hours. After the oxidation leaching is completed, the ore slurry is discharged out of the autoclave for liquid-solid separation. Zn is represented by Zn 2+ After entering the leaching solution, the zinc leaching rate is as high as 98.73% through laboratory analysis, and the leaching slag tempering method lead smelting system recovers Ag, Pb, S and other valuable elements. The zinc-containing leaching solution is directly subjected t...

Embodiment 2

[0040]Wet grind 500g of zinc sulfide concentrate (Zn51.58%; As0.15%; S28.73%; Pb5.07%; Ag37g / t; Fe15.11%) until the particle size is less than 200 mesh, and then mix it with dilute sulfuric acid , and then poured into the autoclave. During the leaching process, pure oxygen is continuously fed and the technical conditions are controlled: the concentration of sulfuric acid is 160g / L, the liquid-solid ratio is 6:1, the temperature is 150°C, the adjustment and maintenance pressure is 1.4MPa, and the stirring speed is 600r / min. , The reaction time is 2.5h. After the oxidation leaching is completed, the ore slurry is discharged out of the autoclave for liquid-solid separation. Zn is represented by Zn 2+ After entering the leaching solution, the zinc leaching rate is as high as 99.08% through laboratory analysis, and the leaching slag tempering method lead smelting system recovers Ag, Pb, S and other valuable elements. The zinc-containing leaching solution is directly subjected to sw...

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Abstract

The invention discloses a technology for efficiently and selectively separating zinc in zinc sulfide concentrate. The technology includes the steps that the zinc sulfide concentrate serves as a raw material and is wetly ground, then the wetly-ground concentrate and sulfuric acid or waste electrolyte are mixed into a slurry and poured into a high-pressure kettle for leaching, an adjusting agent A is added, pure oxygen is led in, the proper final acidity is controlled, and most Fe and most As in the zinc sulfide concentrate enter slag in the hematite mode, the iron vitriol mode and the ferric arsenate salt mode. Leached liquid is subjected to acidity regulation to be directly electrolyzed in a rotational flow mode, zinc in the leached liquid is extracted, and an electric zinc product meeting the national standard can be obtained. According to the technology, the traditional purification working procedure is omitted, the technological process and a device are simplified, the technology is simple, operation is easy and convenient, energy consumption is reduced, the leaching rate and the recovery rate of the zinc are increased, resources are saved accordingly, and cost is reduced.

Description

technical field [0001] The invention relates to a process for efficiently and selectively separating zinc from zinc sulfide concentrate, which adopts oxygen pressure acid leaching-swirl flow electrolysis to treat zinc sulfide concentrate, and belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] The invention belongs to the hydrometallurgical process of zinc. At present, most of the treatment methods of zinc sulfide concentrate adopt the wet zinc smelting process. The traditional process is: zinc sulfide concentrate-roasting-sulfuric acid leaching-electrodeposition. This process is relatively mature, and the leaching rate of zinc is also high, but it requires a huge acid system, and the investment is large; the process flow is also relatively complicated; in addition, a large amount of zinc ferrite is generated during the roasting process of sphalerite in zinc concentrate, which is Some zinc ferrites need high temperature and high acid to b...

Claims

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Application Information

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IPC IPC(8): C22B3/08C25C1/16
CPCC22B3/08C25C1/16Y02P10/20
Inventor 李家元刘文奇邓斌周崇松蒋朝金叶丽娟
Owner XIANGNAN UNIV
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