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Sodium-free preparation method of electrolytic nickel thick plate

A technology of electrolytic nickel and sodium, which is applied in the direction of photography technology, equipment, photography auxiliary technology, etc., can solve the problems of large processing equipment and land occupation, increase manpower, material resources and financial costs, etc., achieve simple production process and reduce post-processing Process and handling costs, and the effect of reducing porosity on the board surface

Pending Publication Date: 2021-11-12
广西银亿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sodium sulfate is usually used in the production process of nickel thick plates to increase the conductivity of the solution, and then sodium ions are introduced, which will then enter the anolyte, resulting in a high-sodium-containing post-electrolyte solution, which requires expensive investment Advanced processing equipment and a large workplace require sufficient professional operators, which increases a lot of manpower, material resources and financial costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] NiSO 4 ·6H 2 O is the nickel source, MgSO 4 , boric acid and sulfuric acid as auxiliary materials, the composition of the prepared catholyte is: Ni 2+ : 120g / L, H 3 BO 3 : 10g / L, Mg 2+ : 3.2g / L, Co 2+ ≤0.0001g / L,Na + ≤0.45g / L,Fe 2+ ≤0.0006g / L,Pb 2+ ≤0.0002g / L, Zn 2+ ≤0.0001g / L, Cu 2+ ≤0.0006g / L,Cl - ≤0.037g / L, oil<0.50mg / L, pH=1.27.

[0021] Next, add 14L solution to the electrolytic cell, heat the electrolyte to 60°C, connect the power supply, use the nickel starter as the cathode, and the two lead plates as the anode, adjust the flow rate of the liquid to 2.6ml / min, and the current density to 180A / m 2 , the cathode-to-anode area ratio is 1.5, the electrolysis temperature is 60°C, the nickel drop is 20g / L, the liquid level difference is 1.5cm, the homopolar distance is 13cm, and the electrolysis starts. After continuous electrolysis for 15 days, it was taken out of the tank, and then washed with hot water at 60°C and then dried. The obtained nickel plate...

Embodiment 2

[0023] NiSO 4 ·6H 2 O is the nickel source, MgSO 4 , boric acid and sulfuric acid as auxiliary materials, the composition of the prepared catholyte is: Ni 2+ : 115g / L, H 3 BO 3 : 8g / L, Mg 2+ : 3.0g / L, Co 2+ ≤0.0001g / L,Na + ≤0.45g / L,Fe 2+ ≤0.0006g / L,Pb 2+ ≤0.0002g / L, Zn 2+ ≤0.0001g / L, Cu 2+ ≤0.0006g / L,Cl - ≤0.037g / L, oil<0.50mg / L, pH=4.

[0024] Next, add 14L of solution to the electrolytic cell, heat the electrolyte to 50°C, connect the power supply, use the nickel starter as the cathode, and the two lead plates as the anode, adjust the flow rate of the liquid to 2.6ml / min, and the current density to 150A / m 2 , the cathode-to-anode area ratio is 1, the electrolysis temperature is 50°C, the nickel drop is 15g / L, the liquid level difference is 1cm, and the same pole distance is 12cm, and the electrolysis starts. After continuous electrolysis for 15 days, it was taken out of the tank, and then washed with hot water at 50°C and then dried. The obtained nickel plate ...

Embodiment 3

[0026] NiCl 2 ·6H 2 O is the nickel source, Al 2 (SO 4 ) 3 , boric acid and sulfuric acid as auxiliary materials, the composition of the prepared catholyte is: Ni 2+ : 90g / L, H 3 BO 3 : 2g / L, Al 3+ : 3.7g / L, Co 2+ ≤0.0001g / L,Na + ≤0.45g / L,Fe 2+ ≤0.0006g / L,Pb 2+ ≤0.0002g / L, Zn 2+ ≤0.0001g / L, Cu 2+ ≤0.0006g / L,Cl - ≤0.037g / L, oil<0.50mg / L, pH=5.

[0027] Next, add 14L solution to the electrolytic cell, heat the electrolyte to 70°C, connect the power supply, use the nickel starter as the cathode, and the two lead plates as the anode, adjust the flow rate of the liquid to 2.6ml / min, and the current density to 220A / m 2 , the area ratio of cathode and anode is 2, the electrolysis temperature is 70°C, the nickel drop is 25g / L, the liquid level difference is 2cm, the same pole distance is 14cm, and electrolysis starts. After continuous electrolysis for 15 days, it was taken out of the tank, then washed with hot water at 70°C and then dried. The obtained nickel plate su...

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Abstract

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a sodium-free preparation method of an electrolytic nickel thick plate. According to the sodium-free preparation method of the electrolytic nickel thick plate, nickel salt is taken as a nickel source in catholyte, boric acid is added as a buffer agent, then certain low-concentration metal sulfate is added as a conductive agent, and the pH value of the solution is regulated with acid. In an electrolytic bath, a nickel starting sheet is used as a cathode, a lead plate is used as an anode, a power supply is connected for electrifying electrolysis, the nickel starting sheet and the lead plate can be taken out after electrolysis, the nickel thick plate can be obtained after hot water treatment and drying, and the purity of the produced nickel thick plate reaches 99.996%. According to the sodium-free preparation method of the electrolytic nickel thick plate, sodium ions do not need to be introduced, and the post-treatment process and treatment cost of anolyte are reduced; and meanwhile, a small amount of metal sulfate is added, so that the conductivity of the electrolyte is improved, the electrolyte has certain viscosity, a certain liquid level difference is kept in the electrolysis process, adhesion of hydrogen to the plate surface can be weakened, generation of air holes in the plate surface is reduced, the electroplating-grade electrolytic nickel thick plate is prepared, the production process is simple, and good economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for preparing electrolytic nickel thick plates without sodium. Background technique [0002] Electrolytic nickel is mainly prepared by electrodeposition. Electrolytic nickel has excellent characteristics such as high mechanical strength, good ductility, refractory, and not easy to oxidize in the air. The stainless steel and various alloy steels made of it are widely used in aircraft, tanks, ships, radars, missiles, and spacecraft. And some manufacturing, ceramic pigments, permanent magnet materials, electronic remote control and other fields in civil industry. In the chemical industry, nickel is often used as a hydrogenation catalyst. In recent years, the use of nickel in new energy battery materials, tape recorders, communication equipment, etc. is also growing rapidly. In addition, because of the excellent corrosion resistance of nickel, nickel p...

Claims

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Application Information

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IPC IPC(8): C25C1/08C25D3/12
CPCC25C1/08C25D3/12
Inventor 王佳东邓晓玲张杰韦聪飞王海
Owner 广西银亿新材料有限公司
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