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

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...

AI Technical Summary

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 used, and the production cost is high; 2. The thermal resistance of the copper powder produced by the above method is High, poor thermal conductivity, cannot be used to produce heat pipes used in the IT industry