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Method for automatically removing powders in process of electrolytic preparing metal powder body

A technology for metal powder and powder removal is applied in the field of metallurgy to achieve the effect of reducing energy consumption, labor intensity and good powder removal effect.

Inactive Publication Date: 2011-01-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the continuous ultrasonic field, the metal powder can be automatically shed, but if it is not for the special performance requirements of the powder preparation (such as nano-scale particle size, etc.), applying continuous ultrasonic waves will inevitably increase energy consumption and production costs.
However, with intermittent ultrasonic waves, it is difficult to realize the automatic shedding of powder, and the stability of electrolytic production cannot be guaranteed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Copper powder is produced by electrolysis. Electrolysis conditions: insoluble lead alloy anode, titanium cathode, electrolyte temperature 30-35°C, Cu 2+ 10g / L, sulfuric acid 120g / L, current density 2000A / m 2 . Intermittent ultrasonic-reverse pulse current electrolytic automatic powder removal, ultrasonic power density is 10kW / m 3 , the current density of the reverse pulse current is 2000A / m 2 , Ultrasonic-reverse pulse current synergy time is 5s, and the action time interval is 300s, to realize the complete automatic powder removal of electrolytic copper powder.

Embodiment 2

[0016] Nickel powder is produced by electrolysis. Electrolysis conditions: soluble nickel anode, titanium cathode, electrolyte temperature 50-55°C, Ni 2+ 5g / L, electrolyte pH value 4-5, current density 3500A / m 2 . Intermittent ultrasonic-reverse pulse current electrolytic automatic powder removal, ultrasonic power density is 3kW / m 3 , the current density of the reverse pulse current is 3500A / m 2 , Ultrasonic-reverse pulse current synergy time is 30s, and the action time interval is 2000s, to realize the complete automatic de-powdering of electrolytic nickel powder.

Embodiment 3

[0018] Nickel powder is produced by electrolysis. Electrolysis conditions: insoluble graphite anode, titanium cathode, electrolyte temperature 50-55°C, Ni 2+ 20g / L, electrolyte pH value 2-3 current density 6000A / m 2 . Intermittent ultrasonic-reverse pulse current electrolytic automatic powder removal, ultrasonic power density is 2kW / m 3 , the current density of the reverse pulse current is 6000A / m 2 , Ultrasonic-reverse pulse current synergy time is 15s, and the action time interval is 500s, to realize the complete and automatic de-powdering of electrolytic nickel powder.

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Abstract

The invention relates to an automatic powder removing method in the process of preparing metal powder by electrolysis, which is characterized in that: in the process of preparing the metal powder by electrolysis, intermittent ultrasonic-reverse pulse current is exerted, a metal powder product on an anode is removed from a cathode surface under the synergic action of the ultrasonic waves and reverse pulse current, wherein, the synergic action time of the ultrasonic waves and the reverse pulse current is 1 to 30s, and the action time interval is 20 to 2000s. The method can effectively alleviatethe labor intensity, reduce the energy consumption and improve the working conditions of metal power electrolysis; in addition, the method can ensure the continues operation of the electrolysis process, and has the advantages of good power removing effect, stable product stability and being capable of obviously improving production efficiency.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to an automatic depowdering method in the process of preparing metal powder by electrolysis. Background technique [0002] Electrolysis is the main method for industrial production of metal powder, especially in the production of heavy metal powders such as copper and nickel and the field of silver electrolytic refining. Compared with other powder making methods, the biggest advantage of the electrolysis method is that the powder has high purity, large specific surface area, and good compressibility (compressibility and formability). It is suitable for the preparation of metal powder, metal electrolytic refining and other processes. [0003] In the process of electrolytic powder making, in order to ensure the quality of the powder and the normal progress of electrolysis, the powder product on the cathode must be removed regularly. At present, the electrolysis process of metal p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/00
Inventor 符岩翟秀静李斌川
Owner NORTHEASTERN UNIV LIAONING