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Preparation process for high-purity low-oxygen copper powder and water atomizing device thereof

A preparation process and low-oxygen copper technology, which is applied in the preparation process of high-purity low-oxygen copper powder and its water atomization device, can solve the problems of low bulk density, low atomization efficiency, agglomeration and segregation of copper powder

Active Publication Date: 2020-10-23
湖南省天心博力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water mist pulverization method is an important method for preparing metal and alloy powders. It refers to the method of using water as the atomization medium to impact the liquid metal cluster at a certain speed, so that the liquid metal droplets condense into fine powder; Cohesion between the copper powder particles is easy to occur, so the shape of the copper powder particles is irregular, and the bulk density of the copper powder is low; the metal powder prepared by gas atomization has good sphericity, but the average particle size is large, and the particle size Wide distribution, prone to agglomeration and segregation, low atomization efficiency

Method used

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  • Preparation process for high-purity low-oxygen copper powder and water atomizing device thereof
  • Preparation process for high-purity low-oxygen copper powder and water atomizing device thereof
  • Preparation process for high-purity low-oxygen copper powder and water atomizing device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] refer to figure 1 A preparation process of high-purity low-oxygen copper powder comprises the following steps:

[0043] S1: Melting solid copper metal to obtain molten copper metal;

[0044] S2: performing water atomization and crushing treatment on copper to obtain copper powder;

[0045] S3: performing anti-oxidation treatment on the copper powder;

[0046] S4: Obtain the target copper powder.

[0047] refer to figure 2 , the water atomization method in this copper powder water atomization system comprises the following steps:

[0048] The water atomization method in step S2 comprises the following sub-steps:

[0049] A1: Melting solid copper metal to obtain molten metal;

[0050] A2: The molten metal is flattened by two streams of symmetrically distributed and stable water flows to form a sheet-like flowing molten metal;

[0051] A3: Vibrate the flake molten metal to make it flat under the water pressure on both sides;

[0052]A4: Blow water and flake metal ...

Embodiment 2

[0062] Different from the embodiment, the atomization device in this embodiment also includes a cutting assembly for re-cutting the crushed metal powder, refer to figure 1 , the cutting assembly includes a cutting cylinder 6, the cutting cylinder 6 is located below the high-pressure gas ring 5, the cutting cylinder 6 is coaxially arranged with the high-pressure gas ring 5, and a plurality of laser generators are embedded in the inner wall of the cutting cylinder 6 7, the laser generator 7 can emit laser light, and the broken metal particles move inside the cutting cylinder 6 due to gravity and the promotion of high-pressure gas. The laser generator 7 cuts the broken metal particles inside the cutting cylinder 6 again, reducing the The particle size of the metal droplet enhances the atomization effect of the metal liquid.

[0063] Further, refer to figure 1 and 6 , the outer wall of the cutting cylinder 6 is fixedly provided with a mounting ring 8, the outside of the mounting...

Embodiment 3

[0065] Different from Example 2, refer to figure 1 and Figure 5 , the outer wall of the cutting cylinder 6 in this embodiment is fixedly provided with a wave ring 15, and the inner side of the spacer 14 is provided with a roller 16 that is rotatably connected with the spacer 14 and adapted to the wave edge on the wave ring 15; An elastic member 10 is arranged between the spline end surface and the spline groove wall of the rotating sleeve 9 . While the cutting cylinder 6 in this embodiment is rotating, the wave ring 15 is in contact with the roller 16. Since the position of the roller 16 is fixed, the cutting cylinder 6 will move up and down following the wave edge on the wave ring 15 to speed up the cutting efficiency. In the example, the rotation and the up and down movement of the cutting cylinder 6 share a power source, and the structure is compact.

[0066] In this embodiment, in order to cooperate with the up and down movement of the cutting cylinder 6, the lower end ...

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Abstract

The invention discloses a preparation process for high-purity low-oxygen copper powder and a water atomizing device thereof. The preparation process for copper powder comprises the following steps: melting solid copper metal to obtain copper molten metal; performing water atomizing crushing treatment on the copper to obtain copper powder; performing anti-oxidant treatment on the copper powder to obtain target copper powder, wherein the copper powder is subjected to water atomizing treatment through a water atomizing step: performing flattening treatment on the molten metal through two bunchesof symmetrical and stable water flow to form sheet-shaped flowing molten metal; performing oscillation treatment on the sheet-shaped flowing molten metal, and enabling the sheet-shaped molten metal tobe in a flat state under water pressure at the two sides, wherein the thickness is uniform; blowing water and the sheet-shaped molten metal through high-pressure inert-gas gas flow, and crushing sheet-shaped metal; and performing laser cutting on the crushed molten metal to obtain metal particles with smaller particle sizes. The water atomizing device is combined with gas atomizing advantage forcrushing and cutting after sheeting the molten metal, so that spherical powder with small adhesion, a smooth surface, high purity and low oxygen content is obtained.

Description

technical field [0001] The invention relates to the technical field of copper powder preparation, in particular to a preparation process of high-purity low-oxygen copper powder and a water atomization device thereof. Background technique [0002] Copper powder is the main raw material for preparing self-lubricating bearings. Electrolytic copper powder is often used in production. Electrolytic copper powder has a dendritic structure, low bulk density and good toughness, which can improve the green strength of bronze powder and the post-shrinkage rate of powder products. However, the preparation of electrolytic copper powder is a high-pollution and high-energy-consuming copper powder production method, and electrolytic copper powder is not conducive to sintering. Its dendritic structure is easy to form closed pores during sintering, which seriously affects the performance of oil-impregnated bearings. [0003] At present, the copper powder powder making technology mainly adopts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0812B22F2009/0828B22F2009/0832B22F2009/0876
Inventor 黄雄辉李钢张拥军杨丛红
Owner 湖南省天心博力科技有限公司
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