Electrocobalt production method capable of recycling by-products

A production method and technology of by-products, applied in the field of electric cobalt production, can solve problems such as dangerous sources, prone to combustion and explosion, sodium chlorate production and transportation restrictions, and achieve the effect of solving supply problems and solving open circuit problems

Inactive Publication Date: 2021-05-14
GEM JIANGSU COBALT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium chlorate is unstable, and it is easy to burn and explode when it is mixed with phosphorus, sulfur and organic matter, and it is easy to absorb moisture and agglomerate
The production and transportation of sodium chlorate is greatly restricted by the regulatory authorities, and it is also a major hazard when used, so the stable supply of sodium chlorate becomes a problem

Method used

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  • Electrocobalt production method capable of recycling by-products

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Embodiment 1

[0014] A method for producing electric cobalt with recyclable by-products, comprising the following steps: acid-dissolving an intermediate product of cobalt hydroxide, wherein the mass fraction of metal elements in the intermediate product of cobalt hydroxide is 30% for cobalt and 0.3% for copper. %, the manganese content is 1.8%, the nickel content is 0.06%, the iron content is 0.007%, the calcium content is 0.3%, the zinc content is 0.15%, and other impurities are acid-dissolved with hydrochloric acid, and the pH value is 1.0, and then removed Impurities and enrichment, specifically using chemical precipitation to remove iron, P204 to remove calcium, copper, zinc and manganese, 507 to remove nickel, and then continuous electrowinning, the reaction tank voltage is 2.8V, the current is 1A, and the temperature is 50°C. Cobalt flakes and chlorine gas are obtained after electrowinning , mix chlorine gas with liquid caustic soda, control the temperature of liquid caustic soda at 70...

Embodiment 2

[0017] A method for producing electric cobalt with recyclable by-products, comprising the following steps: acid-dissolving an intermediate cobalt hydroxide, wherein the mass fraction of metal elements in the intermediate cobalt hydroxide is 40% cobalt and 1.7% copper. %, the manganese content is 4%, the nickel content is 0.5%, the iron content is 0.09%, the calcium content is 0.7%, the zinc content is 0.25%, and other impurities are acid-dissolved with sulfuric acid, and the pH value is 1.5, and then removed Miscellaneous, enrichment, and then adopt continuous electrowinning, the reaction tank voltage is 3.5V, the current is 9000A, and the temperature is 70°C. After electrowinning, cobalt flakes and chlorine gas are obtained. The chlorine gas is mixed with liquid caustic soda, and the temperature of the liquid caustic soda is controlled at 75°C. The resulting mixed solution of sodium chlorate and sodium chloride returns to the acid solution together to achieve coarse impurity r...

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Abstract

The invention discloses an electrocobalt production method capable of recycling by-products. The electrocobalt production method comprises the following steps of performing acid dissolution on a cobalt hydroxide intermediate product, performing acid dissolution by hydrochloric acid or sulfuric acid, enabling the pH value range to be 1.0-1.5, then performing impurity removal and enrichment, then performing continuous electrodeposition, enabling the voltage of a reaction tank to be 2.8-3.5 V, enabling the current to be 1-9000 A and the temperature to be 50-70 DEG C, obtaining cobalt sheets and chlorine after electrodeposition, mixing the chlorine and caustic soda liquid, controlling the temperature of the caustic soda liquid to be 70-75 DEG C, making a reaction to generate a sodium chlorate and sodium chloride mixed solution to return to be subjected to acid dissolution together, and achieving coarse impurity removal. According to the electrocobalt production method, the electrocobalt byproducts (chlorine) are subjected to chemical treatment, and the generated sodium chlorate is reused for acid dissolution and iron removal, so that the front-stage production requirements are met, the problem of sodium chlorate supply is solved, and the problem of open circuits of the electrocobalt byproducts is also solved.

Description

technical field [0001] The invention belongs to the technical field of electric cobalt production, and in particular relates to an electric cobalt production method in which by-products can be recycled. Background technique [0002] A large amount of by-product chlorine gas is produced during the production of electric cobalt, which is a harmful industrial waste gas. At present, a large amount of chlorine gas produced in the production process of electric cobalt is absorbed by normal temperature caustic soda to generate sodium hypochlorite solution. [0003] In addition, because sodium chlorate needs to be added in the production process of electric cobalt for acid dissolution and iron removal, and sodium chlorate is a dangerous chemical with the chemical formula of NaClO 3 , with a relative molecular mass of 106.44, usually white or yellowish equiaxed crystals, salty and cool in taste, easily soluble in water and slightly soluble in ethanol. It has a strong oxidizing effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/08C22B3/10C22B23/00
CPCC25C1/08C22B3/10C22B23/0423Y02P10/20
Inventor 许开华张爱青毕凡李炳忠宁超周华峰
Owner GEM JIANGSU COBALT IND CO LTD
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