A method for producing pure cobalt-manganese sulfate solution from zinc smelting cobalt slag

A technology for smelting cobalt manganese sulfate and zinc, applied in the direction of improving process efficiency, etc., 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: 2021-06-08
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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  • A method for producing pure cobalt-manganese sulfate solution from zinc smelting cobalt slag

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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 pure cobalt-manganese sulfate solution from zinc smelting cobalt slag. First, the zinc smelting cobalt slag is pickled and filtered to obtain pickling slag; the obtained pickling slag is washed with water and filtered to obtain water-washed slag; the water-washed slag is subjected to reduction leaching and press-filtered to obtain leachate; the leachate is sulfurized to remove cadmium, Press filtration to obtain the vulcanized liquid; add an oxidizing agent to the vulcanized liquid, and the Fe in the solution 2+ Oxidized to Fe 3+ , and then adjust the pH of the solution by adding a neutralizing agent, so that Fe 3+ Hydrolyze to form a precipitate, press filter to obtain the iron-removed liquid; add a fluorinating agent to the iron-removed liquid to react and press-filter to obtain the fluorinated liquid; finally use the organic relative fluorinated liquid for extraction and phase separation to obtain the extracted The remaining liquid is pure cobalt manganese sulfate solution. Through the technical scheme of the invention, the technical problems that cobalt slag is difficult to sell and valuable metals cannot be fully utilized 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 Patents(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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