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Method for purifying electrolysis primary liquid to remove cobalt in process of purification, electrolysis and smelting of zinc

A technology of zinc smelting and zinc electrolysis, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of high synthesis cost, large material consumption and related waste, and difficulty in promotion, and achieves easy operation, simple process, The effect of increasing the oxidation potential

Inactive Publication Date: 2012-02-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the technical requirements of deep purification of cobalt, the amount of zinc powder or xanthate is usually 50-300 times the theoretical amount, so the actual output of cobalt slag contains a large amount of other impurities, resulting in greater material consumption and related waste thing
[0003] Canada’s Hodson Bay Mining Company adopts the Caro’s acid oxidation precipitation method, which can oxidize and precipitate cobalt in the zinc solution, but the Caro’s acid synthesized by high concentration hydrogen peroxide and concentrated sulfuric acid at low temperature is unstable, and the synthesis cost is high. Difficult to promote in application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The zinc concentration in the solution before electrolysis is 140g / L, the pH=2.5, the cobalt concentration is 10mg / L; the ultrasonic frequency is 40kHz, and the sound intensity is 10W / m 2 Under the action of zinc electrolysis, add peroxymonosulfuric acid as an oxidizing agent, the concentration of peroxymonosulfuric acid is 1mol / L, the molar ratio of peroxomonosulfuric acid and cobalt is 1:1, the treatment time is 2 hours, and the treatment temperature is 70°C. Use zinc concentrate or zinc powder to adjust the pH value, pH = 3, the Co(II) in the solution is oxidized to Co(III), and the Co(OH) 3 Precipitation in the form of cobalt oxide can be produced after calcination; the purified electro-hydraulic pre-liquid can be used to produce metal zinc.

Embodiment 2

[0019] The concentration of zinc in the solution before electrolysis is 100g / L, pH=3, and the concentration of cobalt is 5mg / L; at an ultrasonic frequency of 20kHz, the sound intensity is 15W / m 2 Under the action of zinc electrolysis, add oxidant peroxymonosulfuric acid in the solution before zinc electrolysis. Zinc concentrate or zinc powder adjusts the pH value, pH = 3.5, the Co(II) in the solution is oxidized to Co(III), and the Co(OH) 3 Precipitation in the form of cobalt oxide can be produced after calcination; the purified electro-hydraulic pre-liquid can be used to produce metal zinc.

Embodiment 3

[0021] The concentration of zinc in the solution before electrolysis is 60g / L, pH=1.5, and the concentration of cobalt is 2mg / L; at an ultrasonic frequency of 60kHz, the sound intensity is 5W / m 2 Under the action of zinc electrolysis, add oxidant peroxymonosulfuric acid in the solution before zinc electrolysis. Use zinc concentrate or zinc powder to adjust the pH value, pH = 4, the Co(II) in the solution is oxidized to Co(III), and the Co(OH) 3 Precipitation in the form of cobalt oxide can be produced after calcination; the purified electro-hydraulic pre-liquid can be used to produce metal zinc.

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PUM

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Abstract

The invention discloses a method for purifying electrolysis primary liquid to remove cobalt in the process of purification, electrolysis and smelting of zinc, which comprises the following steps: under the action of ultrasound wave, adding permonosulfuric acid in zinc electrolysis primary liquid; and adjusting the pH value obtained in the step one by using zinc ore concentrate or zinc powder, oxidizing Co(II) in the solution into Co(III) at the temperature of 40-90DEG C and precipitation in the form of Co(OH)3. The invention has simple process and easy operation; by using the permonosulfuric acid as an oxidant, an oxidation potential higher than 2.3V can be provided and the degradation and reaction process can be strengthened; and by using power ultrasound as a synergic means, hydroxyl free groups can be generated in the reaction process, the oxidation potential can be further improved, the hydrolysis and precipitation process of cobalt can be strengthened and the aggregation of precipitation grains grow up. The invention cannot bring other impurities influencing the electrolysis process while efficiently purifying to remove the cobalt.

Description

technical field [0001] The invention relates to a method for purifying and removing cobalt from pre-electrolytic liquid in purifying electrolytic zinc smelting. Background technique [0002] Cobalt is a harmful impurity in zinc hydrometallurgy. At present, factories usually use zinc powder valence antimony salt to remove cobalt or xanthate to remove cobalt from the solution. In order to meet the technical requirements of deep purification of cobalt, the amount of zinc powder or xanthate is usually 50-300 times the theoretical amount, so the actual output of cobalt slag contains a large amount of other impurities, resulting in greater material consumption and related waste things. [0003] Canada’s Hodson Bay Mining Company adopts the Caro’s acid oxidation precipitation method, which can oxidize and precipitate cobalt in the zinc solution, but the Caro’s acid synthesized by high concentration hydrogen peroxide and concentrated sulfuric acid at low temperature is unstable, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/16
CPCY02P10/20
Inventor 洪涛薛娟琴李林波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY