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Production method of high-purity cobalt sheet with content of 99.999%

A production method and technology of pure cobalt flakes, which are applied in photographic processes, electrodes, instruments, etc., can solve the problems of high purity of cobalt electrodeposited only reaching 99.98%, long process of soluble anode electrolysis, and high energy consumption, so as to save energy. The effect of energy consumption, reduction of process complexity, and reduction of equipment investment

Inactive Publication Date: 2021-05-25
GEM JIANGSU COBALT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Soluble anode electrolysis has a long process, high energy consumption and high cost, so it is basically not used at present
The insoluble anode electrolysis method to produce electrolytic cobalt, although it has been successfully applied in cobalt electrolytic production, has certain disadvantages, mainly due to the limitation of raw material impurities, the highest purity of electrolytic cobalt can only reach 99.98%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for producing high-purity cobalt flakes with a content of 99.999%, comprising the following steps:

[0020] 1) Firstly, the insoluble anode electrolysis method is used to produce electrodeposited cobalt with a purity of 99.95% and a thickness of 1mm as the starting electrode sheet. During the production process, the cell voltage is 2.0V, the stable current is 6000A, the acidity of the circulating liquid is 0.02, and the single cell flow rate is 2m 3 / h, the cobalt content of circulating liquid is 40g / L;

[0021] 2) Use the starting electrode sheet with a thickness of 1mm as the cathode to produce an electrodeposited cobalt plate with a thickness of 4mm and a purity of 99.95%. The process conditions are: cell voltage 2.0V, stable current 6000A, circulating liquid acidity 0.02, single cell flow rate 2m 3 / h, the cobalt content of circulating liquid is 40g / L;

[0022] 3) Use the produced 99.95% electro-deposited cobalt plate as the anode and the titanium plate as...

Embodiment 2

[0028] A method for producing high-purity cobalt flakes with a content of 99.999%, comprising the following steps:

[0029] 1) Firstly, electrolytic cobalt with a purity of 99.95% and a thickness of 2 mm is produced by insoluble anode electrolysis as the starting electrode sheet. During the production process, the cell voltage is 4.0 V, the stable current is 12000 A, the acidity of the circulating liquid is 0.1, and the flow rate of a single cell is 5 m 3 / h, the cobalt content of circulating liquid is 120g / L;

[0030] 2) Using the starting electrode sheet with a thickness of 2mm as the cathode to produce an electrodeposited cobalt plate with a thickness of 6mm and a purity of 99.95%, the process conditions are: cell voltage 4.0V, stable current 12000A, circulating liquid acidity 0.1, single cell flow rate 5m 3 / h, the cobalt content of circulating liquid is 120g / L;

[0031] 3) Use the produced 99.95% electro-deposited cobalt plate as the anode and the titanium plate as the c...

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Abstract

The invention discloses a production method of a high-purity cobalt sheet with a content of 99.999%. The production method comprises the following steps: (1) firstly, producing an electrodeposited cobalt with the purity of 99.95% and the thickness of 1-2 mm through an insoluble anode electrolysis method to serve as a starting sheet; (2) producing an electrodeposited cobalt plate with the thickness of 4-6 mm and the purity of 99.95% by taking a starting sheet with the thickness of 1-2 mm as a cathode; and (3) conducting secondary electrolytic refining by taking the produced 99.95% electrodeposited cobalt plate as an anode, a titanium plate serves as a cathode, wherein the stable current ranges from 6000 A to 12000 A, the current density ranges from 200 A / m < 2 > to 400 A / m < 2 >, a cobalt chloride solution serves as an electrolytic medium, the cobalt content ranges from 50 g / L to 150 g / L, the acidity ranges from 0.05 to 0.15, and the high-purity cobalt sheet with the content higher than 99.999% is produced. The method is low in production cost and good in economic benefit, and the high-purity cobalt sheet with the cobalt content exceeding 99.999% can be produced through secondary electrolytic refining in the same tank.

Description

technical field [0001] The invention belongs to the technical field of cobalt sheet production, and in particular relates to a production method of high-purity cobalt sheet with a content of 99.999%. Background technique [0002] Metal cobalt flake is a very important industrial raw material, and it is the only cobalt additive used in the process of manufacturing cobalt products by smelting. With the continuous deepening of the modernization process, cobalt products produced by smelting methods, such as samarium-cobalt alloys and nickel-cobalt alloys in magnetic materials, hydrogen storage alloys composed of rare earth elements, cobalt and nickel elements, and various cobalt alloy steels are becoming more and more popular. It is widely used; cobalt flakes are also a kind of catalyst catalyst with a wide range of uses. As a result, the demand for metal cobalt sheets is also increasing. [0003] As the main product form of metal cobalt, the production method of electrolytic ...

Claims

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Application Information

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IPC IPC(8): C25C1/08C25C7/06C25C7/02
CPCC25C1/08C25C7/02C25C7/06
Inventor 许开华史齐勇李炳忠王超宁超王博周华峰
Owner GEM JIANGSU COBALT IND CO LTD