Method for producing electrodeposition cobalt

A production method and electrowinning technology, applied in the direction of photographic technology, equipment, photographic auxiliary technology, etc., can solve the problems of high labor intensity, pollution of electrolytic fluid, time-consuming and labor-intensive problems, so as to improve the quality of cobalt products and reduce labor intensity , the effect of improving the working environment

Active Publication Date: 2010-12-15
GEM JIANGSU COBALT IND CO LTD +1
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AI Technical Summary

Problems solved by technology

[0009] The existing electrolytic cobalt production method has a low utilization rate of raw materials in the processing process, and the produced electrolytic cobalt is difficult to meet the requirements in terms of purity and recovery rate. Specifically, there are the following problems:
[0010] 1. Strong sulfuric acid mist or chlorine gas will be produced during the electrowinning process (the output of chlorine gas is 1.2 times the weight of electrolytic cobalt metal), polluting the environment
Although environmental protection measures such as gas gathering hoods, ventilation fans, powerful fans, and absorption towers have been adopted, the problem is still difficult to eradicate, and has a great impact on the production environment, the physical and mental health of operators, and the life and safety of equipment and equipment.
[0011] 2. During the electrowinning process, the acid mist generated will entrain the volatilization and loss of cobalt salt, which reduces the recovery rate of cobalt metal
[0012] 3. The production of a large amount of anode slag (CoOOH) increases the loss of cobalt and reduces the recovery rate of cobalt metal
[0013] 4.OH - Oxygen generated after the anode is discharged, hypochlorous acid generated by the reaction of a small amount of chlorine gas and water will oxidize the cathode cobalt, make the electrolytic cobalt product contain oxygen impurities, and reduce the purity of cobalt
[0014] 5. Using an open electrowinning cell, the production process is lengthy, the steps are cumbersome, labor-intensive, labor-intensive, and time-consuming. In addition, the cobalt solution in the electrowinning cell is directly exposed to the air. Dust and other sundries will pollute the electrolytic fluid at any time, making it difficult to guarantee the quality of electrolytic cobalt products

Method used

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  • Method for producing electrodeposition cobalt
  • Method for producing electrodeposition cobalt
  • Method for producing electrodeposition cobalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Cobalt chloride solution (cobalt concentration: 95 g / L; copper: 0.0002 g / L; lead: 0.0003 g / L; iron: 0.0008 g / L; manganese: 0.0005 g / L; zinc: 0.0006 g / L; organic : 5.6ppm; pH value: 4.5), hydroxylamine hydrochloride, hydrochloric acid and deionized water are prepared to form a solution with cobalt concentration of 72 g / L, hydroxylamine hydrochloride 0.05 g / L, pH value of 2.0, and temperature of 55 °C as a circulating fluid, which is added to In the electrolyte storage tank 21. Control the flow rate of 2.8 cubic meters per hour to pump the circulating liquid into the electrowinning tank. When the tank is full, turn on the power supply, maintain a tank voltage of 2.5 volts and a current density of 430 amps / square meter for electrowinning, and keep the electrolyte storage tank The concentration of Co in the circulating fluid is 60-75 g / L, and the concentration of hydroxylamine hydrochloride is 0.04-0.05 g / L. After 72 hours, it can be stripped out of the tank to obtain an el...

Embodiment 2

[0050] Cobalt chloride solution (cobalt concentration: 95 g / L; copper: 0.0002 g / L; lead: 0.0003 g / L; iron: 0.0008 g / L; manganese: 0.0005 g / L; zinc: 0.0006 g / L; organic : 5.6ppm; pH value: 4.5), hydroxylamine hydrochloride, hydrochloric acid and deionized water are formulated into a solution with cobalt concentration of 65 g / L, hydroxylamine hydrochloride 0.05 g / L, pH value of 2.0, and temperature of 50°C as a circulating fluid, which is added to In the electrolyte storage tank 21. Control the flow rate of 2.8 cubic meters per hour to pump the circulating liquid into the electrowinning tank. When the tank is full, turn on the power supply, maintain a tank voltage of 3.0 volts and a current density of 380 amps / square meter for electrowinning, and keep the electrolyte storage tank The concentration of Co in the circulating liquid is 60-75 g / L, and the concentration of hydroxylamine hydrochloride is 0.04-0.05 g / L. After 68 hours, it can be stripped out of the tank to obtain an ele...

Embodiment 3

[0052] Cobalt chloride solution (cobalt concentration: 95 g / L; copper: 0.0002 g / L; lead: 0.0003 g / L; iron: 0.0008 g / L; manganese: 0.0005 g / L; zinc: 0.0006 g / L; organic : 5.6ppm; pH value: 4.5), hydroxylamine hydrochloride, hydrochloric acid and deionized water are formulated into a solution with cobalt concentration of 69 g / L, hydroxylamine hydrochloride 0.05 g / L, pH value of 2.0, and temperature of 58°C as a circulating fluid, which is added to In the electrolyte storage tank 21. Control the flow rate of 2.8 cubic meters per hour to pump the circulating liquid into the electrowinning tank. When the tank is full, turn on the power supply, maintain a tank voltage of 2.3 volts and a current density of 400 amperes per square meter for electrowinning, and keep the electrolyte storage tank The concentration of Co in the circulating fluid is 60-75 g / L, and the concentration of hydroxylamine hydrochloride is 0.04-0.05 g / L. After 65 hours, it can be stripped out of the tank to obtain ...

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Abstract

The invention relates to a method for producing electrodeposition cobalt, which can effectively inhibit the generation of anode slag and improve the recovery rate of cobalt. In the method, an electrodeposition solution contains CoCl2 and hydroxylamine hydrochloride, the concentration of the hydroxylamine hydrochloride in the electrodeposition solution is 0.03-0.06g / l, the pH value of the electrodeposition solution is 1.5-2.5, and preferably, the electrodeposition time is 60-80h. The electrodeposition is carried out preferably in a closed electrodeposition device which comprises an electrodeposition tank, a tail gas absorbing device, a circulating pump and an electrolyte storage tank that are serially connected, wherein the tail gas absorbing device is connected with the outlet of the electrodeposition tank. The invention has the advantages of remarkably improving the quality and the recovery rate of a cobalt product, having small occupation area and simple operation, lowering the labor intensity, ensuring the high yield of high-class cobalt products, and effectively improving the working environment and preventing the pollution when the whole procedure is carried out under the fully-closed condition.

Description

technical field [0001] The invention relates to a production method of electrolytic cobalt, which belongs to the technical field of electrolytic cobalt production facilities. Background technique [0002] Cobalt has excellent properties such as corrosion resistance, high melting point, and strong magnetism. It is an important raw material for the production of various special steels, heat-resistant alloys, corrosion-resistant alloys, and magnetic alloys. It is widely used in aerospace, machinery manufacturing, and batteries. The purity Higher cobalt is widely used in magnetic materials and super alloy materials, and cobalt with a purity of more than 99.999% is also used as a target for advanced electronic components. [0003] In nature, cobalt generally exists in the form of cobalt salts or associated ores of minerals. At present, the actual usable cobalt resources in my country are estimated to be only about 40,000 tons, which is a country with a serious shortage of cobalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/08C25C7/00
Inventor 杨小华张爱青
Owner GEM JIANGSU COBALT IND CO LTD
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