A method for preparing cobalt oxide from zinc smelting cobalt slag

A zinc smelting and cobalt oxide technology is applied in the field of zinc smelting cobalt slag to prepare cobalt oxide, which can solve the problems of large investment in extraction equipment, affecting the stability of the main system, and occupying a lot of organic matter, avoiding unstable factors, reducing processing costs and equipment. The effect of short investment and process flow

Active Publication Date: 2021-09-03
HENAN YUGUANG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process mainly adopts two-stage extraction for impurity removal. The process is long, the operation is difficult, and the investment in extraction equipment is large.
And the organic matter takes up a lot in the middle, and when the liquid produced by organic matter is returned to the main system, some organic matter will be brought in, which will affect the stability of the main system

Method used

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  • A method for preparing cobalt oxide from zinc smelting cobalt slag

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Effect test

Embodiment 1

[0038] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:

[0039] a. First, add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 3:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 70g / L, raise the temperature and maintain the temperature at 85°C for 4 hours, then acid wash Press filtration after washing; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 3:1, and then washed with water at room temperature for 1 hour to perform press filtration to obtain the pretreated cobalt residue;

[0040] b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 3:1 for slurrying, then add concentrated sulfuric acid twice the theoretical amount, maintain the reaction temperature at 80°C, and slowly add hydrogen pero...

Embodiment 2

[0047] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:

[0048] a. First add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 4:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 60g / L, heat up and maintain the temperature at 90°C for 3 hours, pickle Finally, press filtration; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 4:1, and then washed with water at room temperature for 1 hour to perform press filtration, and the pretreated cobalt residue is obtained;

[0049]b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 4:1 for slurrying, then add concentrated sulfuric acid with a theoretical dosage of 1.8 times, maintain the reaction temperature at 75°C, and slowly add hydrogen peroxide with a ...

Embodiment 3

[0056] The method for preparing cobalt oxide from zinc smelting cobalt slag of the present invention, the detailed steps of this preparation method are as follows:

[0057] a. First, add zinc smelting cobalt slag and demineralized water according to the liquid-solid ratio of 5:1 for slurrying, then add concentrated sulfuric acid according to the initial acidity of 50g / L, heat up and maintain the temperature at 90°C for 2 hours, pickle Finally, press filtration; the press filter residue is slurried by adding desalted water according to the liquid-solid ratio of 5:1, and then washed with water at room temperature for 1 hour to perform press filtration to obtain pretreated cobalt residue;

[0058] b. Add desalted water to the cobalt slag pretreated in step a according to the liquid-solid ratio of 5:1 for slurrying, then add concentrated sulfuric acid 1.5 times the theoretical amount, maintain the reaction temperature at 70°C, and slowly add hydrogen peroxide 6 times the theoretica...

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Abstract

The invention discloses a method for preparing cobalt oxide from zinc smelting cobalt slag. First, the zinc smelting cobalt slag is pretreated to obtain cobalt slag with low zinc and cadmium content; the pretreated cobalt slag is subjected to reduction leaching and pressure filtration to obtain leaching solution 1; a co-precipitation agent is added to the obtained leaching solution 1 to remove lead After the reaction, sodium carbonate is added to neutralize, and after neutralization, pressure filtration is carried out to obtain a liquid after iron removal; a selective cobalt precipitation agent is added to the obtained liquid after iron removal for the first selective cobalt precipitation, and cobalt precipitation residue is obtained after washing 1; the obtained cobalt residue 1 is subjected to reduction leaching and pressure filtration to obtain a leach solution 2; sodium hydroxide is added to the obtained leach solution 2 to carry out a selective cobalt precipitation reaction, and the obtained cobalt residue is washed to obtain a cobalt residue 2; The cobalt slag 2 is calcined to obtain a standard cobalt oxide product. The invention has simple operation process, low production cost and less equipment investment, and realizes the maximization of the benefit of valuable metals in the cobalt slag of zinc smelting.

Description

[0001] 1. Technical field: [0002] The invention belongs to the technical field of non-ferrous metal smelting, and in particular relates to a method for preparing cobalt oxide from cobalt slag of zinc smelting. [0003] 2. Background technology: [0004] Due to the existence of the valuable metal cobalt in the zinc smelting raw materials, some purified cobalt slag will be produced in the purification workshop of the wet process. After the cadmium recovery process recovers cadmium from the purified cobalt slag, zinc is further recovered and cobalt is enriched through cobalt recovery, thereby Obtain zinc smelting cobalt slag. The composition of zinc smelting cobalt slag is complex. In addition to a large amount of manganese and zinc, it also contains a small amount of impurities such as cadmium, lead, iron, calcium, and magnesium. Because cobalt slag is difficult to deal with, at present, there are two main ways to deal with similar cobalt-containing materials in the zinc smelt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00
CPCC22B7/007C22B23/043C22B23/0461Y02P10/20
Inventor 许斌倪恒发杨腾蛟商绘峰陶杰孔金换董高峰
Owner HENAN YUGUANG ZINC IND
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