Method for preparing low-apparent-density copper powder through water atomization

A low-loose, water-atomization technology, applied in the field of water atomization to prepare low-loose-density copper powder, can solve the problems of poor thermal conductivity, high thermal resistance of copper powder, and high production cost, and achieve good thermal conductivity and thermal conductivity. The effect of low resistance value and lower production cost

Inactive Publication Date: 2010-09-22
浙江旭德新材料有限公司
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Problems solved by technology

The disadvantages of the above-mentioned existing method for preparing copper powder with low bulk density by water atomization are: 1. Copper oxide powder with 1 to 10% of the weight of pure copper needs to be

Method used

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Example Embodiment

[0011] The specific embodiment of the invention will be described in detail below.

[0012] A method for preparing copper powder with low bulk density by water atomization, using electrolytic copper plates and waste copper tubes as raw materials, including smelting, centrifugal dehydration, drying, reduction and crushing processes.

[0013] For smelting, put the raw materials into an intermediate frequency smelting furnace with a temperature between 1100 and 300°C for smelting, continuously stir and carry out air blowing operations at the same time. Specifically, the air blowing operation is carried out when the copper raw materials are smelted. The air blowing must be kept at The surface of the copper liquid in the center of the furnace is continuously stirred to allow it to fully oxidize. During the atomization process, the hole diameter of the leak bag is between 3.0-6.0mm, the atomization water pressure is 30-50MPa, and the spray angle is 35-50°. At the same time, there is...

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Abstract

The invention relates to a method for preparing copper powder. The method for preparing low-apparent-density copper powder through water atomization comprises a smelting process, which is to smelt raw materials put into a smelting furnace at the temperature of between 1,100 and 300 DEG C, constantly stir and simultaneously performing air-blowing operation. The method has the advantages of using no copper oxide and reducing production cost.

Description

technical field [0001] The invention relates to a method for preparing copper powder, in particular to a method for preparing copper powder with low bulk density by water atomization. Background technique [0002] At present, the commonly used method of water atomization to prepare low bulk density copper powder is to reduce the bulk density of copper powder by controlling the copper smelting process. For example, the Chinese patent publication number is CN1927510, and the application number is 200610121160.7. It is: by adding copper oxide powder of 1-10% by weight of pure copper to the copper melt melted at 1140-1210 ° C, thereby reducing the surface tension of the copper melt and increasing the viscosity of the copper melt, so that the subsequent fog It is easier to obtain irregularly shaped powders during the chemicalization process. Then through subsequent drying and reduction processes, the surface roughness of the powder is increased, so that the bulk density of the c...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 吴棕洋吴红华李杰
Owner 浙江旭德新材料有限公司
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