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A process for efficiently enriching copper and indium in zinc sulfide concentrate

A zinc sulfide concentrate and high-efficiency technology, which is applied in photography technology, photography auxiliary technology, sulfur preparation/purification, etc., can solve the problems of electrolytic zinc production and copper enrichment, iron removal cost and iron slag increase, indium slag grade, poor quality, etc., to achieve the effect of improving the total zinc recovery rate, ensuring the total recovery rate, and high grade

Active Publication Date: 2019-01-08
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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  • A process for efficiently enriching copper and indium in zinc sulfide concentrate

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 screened zinc sulfide concentrate into the storage bin, after being measured, enter the high-efficiency slurry tank for slurry treatment, and then pump it into the vertical grinding machine for grinding, and the output More than 98% of the particle size of the zinc concentrate material is less than 44μm grinding slurry, and the solid content of the grinding slurry is 65%;

[0029](2) One-stage oxygen pressure leaching: the ground ore slurry flows into the middle tank, and is pumped to the one-stage leaching feeding stirring tank, and the one-stage leaching slurry after stirring and mixing is pumped to the first section of the one-stage leaching horizontal autoclave. During the pumping process, the autoclave slurry metering pump is used to control the flow rate, and steam and oxygen are int...

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 screened zinc sulfide concentrate into the storage bin, after being measured, enter the high-efficiency slurry tank for slurry treatment, and then pump it into the vertical grinding machine for grinding, and the output More than 98% of the particle size of the zinc concentrate material is less than 44μm grinding slurry, and the solid content of the grinding slurry is 66%;

[0038] (2) One-stage oxygen pressure leaching: the ground ore slurry flows into the middle tank, and is pumped to the one-stage leaching feeding stirring tank, and the one-stage leaching slurry after stirring and mixing is pumped to the first section of the one-stage leaching horizontal autoclave. During the pumping process, the autoclave pulp metering pump is used to control the flow rate, and steam and oxygen are intr...

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 screened zinc sulfide concentrate into the storage bin, after being measured, enter the high-efficiency slurry tank for slurry treatment, and then pump it into the vertical grinding machine for grinding, and the output More than 98% of the particle size of the zinc concentrate material is less than 44μm grinding slurry, and the solid content of the grinding slurry is 67%;

[0047] (2) One-stage oxygen pressure leaching: the ground ore slurry flows into the middle tank, and is pumped to the one-stage leaching feeding stirring tank, and the one-stage leaching slurry after stirring and mixing is pumped to the first section of the one-stage leaching horizontal autoclave. During the pumping process, the autoclave slurry metering pump is used to control the flow rate, and steam and oxygen are in...

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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, in particular 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 technologies used are also different. "Two-stage countercurrent oxygen pressure leaching process for complex copper-lead-zinc-silver mixed concentrate" published by Xu Bin et al. Oxygen pressure leaching conditions for the first and second stages are sulfuric acid concentration 150g / L, liquid-solid ratio 3:1, reaction temperature 135°C, oxygen partial pressure 0.75MPa, leaching time 2.0h; sulfuric acid concentration 80g / L, liquid-solid The ratio is 3:1, the reaction temperature is 180°C, the oxygen partial pressure is 1.0MPa, and the leaching time is 2.5h. Disadvantages: The enrichment of indium is not considered in this tec...

Claims

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Application Information

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Patent Type & Authority Patents(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
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