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Method for producing pure cobalt and manganese sulfate solution through zinc smelting cobalt slag

A cobalt manganese sulfate and zinc smelting technology, applied in the direction of improving process efficiency, can solve the problems of inability to maximize the benefit of valuable metals, complex composition of zinc smelting cobalt slag, low direct sales price, etc., and achieve significant economic benefits and Social benefits, reducing hazardous waste output, and increasing value

Active Publication Date: 2020-02-04
HENAN YUGUANG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zinc smelting cobalt slag contains about 20% cobalt, and its recovery value is relatively high; however, 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 cadmium, lead, iron, calcium, magnesium and other impurities. Difficult and low direct sales price
Therefore, the benefit maximization of valuable metals cannot be realized

Method used

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  • Method for producing pure cobalt and manganese sulfate solution through zinc smelting cobalt slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for producing pure cobalt-manganese sulfate solution from zinc smelting cobalt slag of the present invention, the detailed steps of this production method are as follows:

[0036] a. First, add demineralized water to the zinc smelting cobalt slag for slurrying according to the liquid-solid ratio of 3:1, add concentrated sulfuric acid according to the acidity of 70g / L, heat up to 85°C for pickling for 4 hours, and press filter to obtain the pickling slag;

[0037] b. Adding desalted water to slurry the pickling slag obtained in step a according to the liquid-solid ratio of 3:1, then washing with desalted water for 1 hour at room temperature, and pressing to obtain the washed slag;

[0038] c. Add desalted water to the washed slag obtained in step b according to a liquid-solid ratio of 3:1 for slurrying, then add concentrated sulfuric acid twice the theoretical amount, maintain the reaction temperature at 80°C, slowly add double hydrogen peroxide with a theoreti...

Embodiment 2

[0044] The method for producing pure cobalt-manganese sulfate solution from zinc smelting cobalt slag of the present invention, the detailed steps of this production method are as follows:

[0045] a. First, add demineralized water to the zinc smelting cobalt slag according to the liquid-solid ratio of 4:1 for slurrying, add concentrated sulfuric acid according to the acidity of 60g / L, heat up to 90°C for pickling for 3 hours, and press filter to obtain the pickling slag;

[0046] b. Adding desalted water to slurry the pickling slag obtained in step a according to the liquid-solid ratio of 4:1, then washing with desalted water at room temperature for 1 hour, and pressing to obtain the washed slag;

[0047] c. Add desalted water to the water-washed slag obtained in step b 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, slowly add theoretical dosage of ...

Embodiment 3

[0053] The method for producing pure cobalt-manganese sulfate solution from zinc smelting cobalt slag of the present invention, the detailed steps of this production method are as follows:

[0054] a. First, add demineralized water to the zinc smelting cobalt slag according to the liquid-solid ratio of 5:1 for slurrying, add concentrated sulfuric acid according to the acidity of 50g / L, heat up to 90°C for pickling for 2 hours, and press filter to obtain the pickling slag;

[0055] b. Adding desalted water to slurry the pickling slag obtained in step a according to the liquid-solid ratio of 5:1, then washing with desalted water for 1 hour at normal temperature, and pressing to obtain the washed slag;

[0056] c. Add the water-washed slag obtained in step b to desalted water according to the liquid-solid ratio of 5:1 for slurrying, then add concentrated sulfuric acid with a theoretical dosage of 1.5 times, maintain the reaction temperature at 70°C, slowly add a theoretical dosage...

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Abstract

The invention discloses a method for producing a pure cobalt and manganese sulfate solution through zinc smelting cobalt slag. Firstly, the zinc smelting cobalt slag is subjected to acid pickling andfilter pressing, and acid pickling slag is obtained; the obtained acid pickling slag is subjected to washing, and filter pressing, and washing slag is obtained; the washing slag is subjected to reduction leaching and filter pressing, and leaching liquid is obtained; the leaching liquid is subjected to vulcanization cadmium removal and filter pressing, and liquid after vulcanization is obtained; anoxidizing agent is added into the liquid after oxidizing agent, Fe2+ in the solution is oxidized into Fe3+, a neutralizing agent is added for adjusting the pH of the solution, the Fe3+ is hydrolyzedto form sediment, filter pressing is carried, and liquid after iron removal is obtained; a fluorinating agent is added into the liquid after iron removal to be subjected to a reaction and filter pressing, and liquid after fluorination is obtained; and finally, an organic phase is adopted for extracting and phase splitting of the liquid after fluorination, extraction raffinate is obtained, that isthe pure cobalt and manganese sulfate solution. According to the technical scheme, the technical problems that cobalt slag is difficultly sold, and valuable metal cannot be sufficiently used can be solved.

Description

[0001] 1. Technical field: [0002] The invention belongs to the technical field of nonferrous smelting, in particular to a method for producing pure cobalt-manganese sulfate solution from cobalt slag produced in zinc smelting. [0003] 2. Background technology: [0004] With the continuous development of my country's industry, zinc smelting technology is also improving. The traditional way of zinc smelting is hydro-method zinc smelting. During the operation, some solid hazardous waste rich in valuable metals will be produced. If it is discharged to the external environment, it will not only pollute the environment, but also pollute the waste residue. Valuable metals are wasted. [0005] 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 through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00
CPCC22B7/007C22B23/043C22B23/0461C22B47/00Y02P10/20
Inventor 倪恒发许斌杨腾蛟商绘峰陶杰孔金换董高峰
Owner HENAN YUGUANG ZINC IND
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