Method for electrolytically preparing magnetic copper powder

A copper powder and magnetic technology, applied in the direction of coating, etc., can solve the problems of insufficient uniformity and density of copper powder, easy occurrence of dead zone and coagulation, and easy agglomeration of particles in dead zone, so as to facilitate large-scale industrial application and facilitate adhesion Electroplating, low cost effect

Inactive Publication Date: 2011-08-17
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the patent No. 200910035271.X is a kind of biomass conductive carbon double fluidized bed electrode reactor for treating low-concentration metal wastewater, but when the expansion rate of this bed is low, the fluidization quality is poor, and dead zones and cross flow are prone to occur. , the particles in the dead zone are easy to agglomerate, and are us

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  • Method for electrolytically preparing magnetic copper powder
  • Method for electrolytically preparing magnetic copper powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A mixed solution of sulfuric acid and copper sulfate was configured as the electrolyte, the concentration of copper sulfate in the electrolyte was 50g / L, the pH value was adjusted to 3 with sulfuric acid, and the temperature of the electrolyte was adjusted to 20°C.

[0025] Select an insulating and acid-resistant diaphragm (the diameter of the diaphragm is smaller than the particle size of the stainless steel), make the diaphragm chamber into a cylindrical shape, and put it into the electrolyte; put the stirrer into the diaphragm chamber, close to the bottom wall of the diaphragm chamber, and adjust the speed to 50r / min Add acid-resistant, wear-resistant and magnetic stainless steel powder to form a suspension with a stainless steel powder concentration of 100g / L to ensure that the stainless steel powder is in a fluid state; put the graphite electrode into the suspension.

[0026] Graphite is placed in the electrolyte outside the diaphragm as the anode.

[0027] Turn on...

Embodiment 2

[0030] A mixed solution of sulfuric acid and copper sulfate was configured as the electrolyte, the concentration of copper sulfate in the electrolyte was 100g / L, the pH value was adjusted to 5 with sulfuric acid, and the temperature of the electrolyte was adjusted to 30°C.

[0031] Select an insulating and acid-resistant diaphragm (the diameter of the diaphragm is smaller than the particle size of the stainless steel), make the diaphragm chamber into a cylindrical shape, and put it in the electrolyte; put the stirrer in the diaphragm chamber, close to the bottom wall of the diaphragm chamber, and adjust the speed to 100r / min Add acid-resistant, wear-resistant and magnetic stainless steel powder to form a suspension with a stainless steel powder concentration of 200g / L to ensure that the stainless steel powder is in a fluid state; put the graphite electrode into the suspension.

[0032] Graphite is placed in the electrolyte outside the diaphragm as the anode.

[0033] Turn on t...

Embodiment 3

[0036] A mixed solution of sulfuric acid and copper sulfate is configured as the electrolyte, the concentration of copper sulfate in the electrolyte is 150g / L, the pH value of the electrolyte is adjusted to 7, and the temperature of the electrolyte is adjusted to 45°C.

[0037] Select an insulating and acid-resistant diaphragm (the diameter of the diaphragm is smaller than the particle size of the stainless steel), make the diaphragm chamber into a cylindrical shape, and put it in the electrolyte; put the stirrer in the diaphragm chamber, close to the bottom wall of the diaphragm chamber, and adjust the speed to 300r / min Add acid-resistant, wear-resistant and magnetic stainless steel powder to form a suspension with a stainless steel powder concentration of 500g / L to ensure that the stainless steel powder is in a fluid state; put the graphite electrode into the suspension.

[0038] Graphite is placed in the electrolyte outside the diaphragm as the anode.

[0039] Turn on the D...

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Abstract

The invention relates to a method for electrolytically preparing magnetic copper powder, which comprises the following steps: adding the stainless steel powder into a diaphragm chamber, agitating the stainless steel powder to lead the stainless steel powder to be in a fluid state, thereby forming suspension liquid; then taking a graphite electrode and the stainless steel powder in the suspension liquid as cathodes, taking sulfuric acid and copper sulfate solution as electrolyte and taking the graphite electrode placed outside the diaphragm chamber as an anode; and collecting the obtained magnetic copper powder by adopting a magnetic method after the completion of electrolysis. Compared with the traditional electrolytic copper powder process, the substitution method for preparing copper-coated iron particles and the wet recovery copper process, the method has low cost and high efficiency and is convenient for large-scale industrial application; and the magnetic copper powder obtained by the method can be used for the chemical industry, the metallurgy industry and other industries and can be recovered and reused by adopting the magnetic method.

Description

technical field [0001] The invention belongs to the field of copper powder preparation, in particular to a method for electrolytically preparing magnetic copper powder. Background technique [0002] At present, domestic electrolytic copper powder technology generally uses electrolytically refined copper plates as cathodes and blister copper as anodes. The cathode copper is scraped and ground into copper powder. The copper powder prepared by the electrolytic method has high purity, large specific surface area, good compressibility and formability, and can be used in industrial fields such as powder metallurgy and electrical alloy. However, this method must regularly stop production and brush powder, the operation is complicated, and the copper powder produced is easily polluted by anode slime. When the concentration of copper ions in the solution is low (such as lower than 1g / L), the electrochemical polarization and concentration polarization are large, the current efficienc...

Claims

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Application Information

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IPC IPC(8): B22F1/02C25C5/00
Inventor 李登新董金慧华亚妮张舒
Owner DONGHUA UNIV
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