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Technology for efficiently enriching copper and indium in zinc sulfide concentrates

A zinc sulfide concentrate, high-efficiency technology, applied in the direction of photographic process, photographic auxiliary process, process efficiency improvement, etc., can solve the problems of electrolytic zinc production and copper enrichment, cost of iron removal and increase of iron slag, three-containing Iron valence and high acidity problems, to achieve the effect of improving the total zinc recovery rate, ensuring the total recovery rate, and high grade

Active Publication Date: 2018-01-23
南丹县南方有色金属有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: The enrichment of indium is not considered in this technology
Disadvantages: In this scheme, one-stage oxygen pressure leaching is used instead of two-stage countercurrent oxygen pressure leaching. The resulting leaching solution contains ferric iron and has high acidity, and the subsequent enrichment of indium slag has poor grade and quality and is difficult to extract.
There are the following disadvantages: ①The reduction and replacement of iron powder causes the iron content in the zinc sulfate solution to increase, the subsequent cost of iron removal and the amount of iron slag increase, and the total zinc recovery rate decreases; ②The copper in the zinc sulfate solution contains copper when the zinc powder replaces the indium It also almost settles, and copper sulfate needs to be added to the solution during subsequent iron removal. At the same time, zinc powder must first react with copper ions and acid before replacing indium. The amount of zinc powder is large and the cost is high; 3 As
There are the following disadvantages: ① Iron powder is used for reduction and replacement; ② There is no pre-neutralization before neutralizing indium; ③ The two-stage acid leaching-reduction leaching solution of zinc calcine is used as the test solution, not the two-stage countercurrent oxygen pressure leaching of zinc sulfide concentrate The supernatant of the first stage of the process is used as raw material, which cannot take into account the production of electrolytic zinc and the enrichment of copper and indium

Method used

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  • Technology for efficiently enriching copper and indium in zinc sulfide concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A process for efficiently enriching copper and indium in zinc sulfide concentrate is characterized in that it comprises the following steps:

[0028] (1) Grinding: Put the crushed and sieved zinc sulfide concentrate into a storage bin, enter the high-efficiency slurry tank for slurry treatment after measurement, and then pump it into a vertical mill for ore grinding. More than 98% of the zinc concentrate mineral material particle size is less than 44μm grinding slurry, the solid content of the grinding slurry is 65%;

[0029] (2) One-stage oxygen pressure leaching: the grinding slurry flows into the intermediate tank and is pumped to the first-stage leaching and feeding mixing tank. After stirring and mixing, the first-stage leaching slurry is pumped to the first compartment of the first-stage leaching horizontal autoclave. In the pumping process, an autoclave slurry metering pump is used to control the flow, while steam and oxygen are introduced, waste electrolyte is added ...

Embodiment 2

[0036] A process for efficiently enriching copper and indium in zinc sulfide concentrate is characterized in that it comprises the following steps:

[0037] (1) Grinding: Put the crushed and sieved zinc sulfide concentrate into a storage bin, enter the high-efficiency slurry tank for slurry treatment after measurement, and then pump it into a vertical mill for ore grinding. More than 98% of the zinc concentrate mineral material particle size is less than 44μm grinding slurry, the solid content of the grinding slurry is 66%;

[0038] (2) One-stage oxygen pressure leaching: the grinding slurry flows into the intermediate tank and is pumped to the first-stage leaching and feeding mixing tank. After stirring and mixing, the first-stage leaching slurry is pumped to the first compartment of the first-stage leaching horizontal autoclave. During the pumping process, an autoclave slurry metering pump is used to control the flow, while steam and oxygen are introduced, waste electrolyte is ad...

Embodiment 3

[0045] A process for efficiently enriching copper and indium in zinc sulfide concentrate is characterized in that it comprises the following steps:

[0046] (1) Grinding: Put the crushed and sieved zinc sulfide concentrate into a storage bin, enter the high-efficiency slurry tank for slurry treatment after measurement, and then pump it into a vertical mill for ore grinding. Grinding pulp with a particle size of more than 98% of the zinc concentrate mineral material is less than 44μm, and the solid content of the grinding pulp is 67%;

[0047] (2) One-stage oxygen pressure leaching: the grinding slurry flows into the intermediate tank and is pumped to the first-stage leaching and feeding mixing tank. After stirring and mixing, the first-stage leaching slurry is pumped to the first compartment of the first-stage leaching horizontal autoclave. During the pumping process, an autoclave slurry metering pump is used to control the flow, while steam and oxygen are introduced, waste electro...

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Abstract

The invention discloses a technology for efficiently enriching copper and indium in zinc sulfide concentrates. The technology comprises the following steps that (1) the concentrates are ground; (2) first-stage oxygen pressure leaching is conducted; (3) second-stage oxygen pressure leaching is conducted; (4) copper replacement precipitation is conducted; (5) pre-neutralization is conducted; and (6)indium neutralizing precipitation is conducted, specifically, filtrate obtained after filter pressing and pre-neutralization thickened supernatant in the pre-neutralization process overflow through an intermediate tank to be pumped to an indium neutralizing precipitation storage tank and then pumped to an indium neutralizing precipitation stirring reaction tank, a zinc oxide neutralizer or a basic zinc carbonate neutralizer is added, an indium precipitation reaction is conducted for 60 min at the temperature of 75 DEG C, the pH value of the reaction endpoint is controlled to be 4.5-5, reactedconcentrate pulp passes through an intermediate stirring tank and then is pumped into a filter press to be filter-pressed, obtained filter-pressed residues are indium residues, and the indium residues are sent to an indium production system for further extracting indium. According to the technology for efficiently enriching copper and indium in the zinc sulfide concentrates, the utilization rateof copper and indium is increased.

Description

【Technical Field】 [0001] The invention belongs to the field of zinc sulfide concentrates, and particularly relates to a process for efficiently enriching copper and indium in zinc sulfide concentrates. 【Background technique】 [0002] Zinc sulfide concentrate is rich in metals such as zinc, copper and indium. Because of the different metal elements contained, the technology used is also different. Xu Bin et al. published "Two-stage countercurrent oxygen pressure leaching process of complex copper-lead-zinc-silver mixed concentrate" (Chinese Journal of Nonferrous Metals, 2011, 21(4), 901-907), using a two-stage countercurrent oxygen pressure leaching process to treat the The conditions of the first and second stages of oxygen pressure leaching are sulfuric acid concentration 150g / L, liquid-solid ratio 3:1, reaction temperature 135℃, oxygen partial pressure 0.75MPa, leaching time 2.0h; sulfuric acid concentration 80g / L, liquid-solid Ratio 3: 1, reaction temperature 180℃, oxygen par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/46C22B3/44C22B15/00C22B58/00C22B19/20C25C1/16C22B17/00C01B17/06
CPCY02P10/20
Inventor 周南方曹应科
Owner 南丹县南方有色金属有限责任公司