Metal powder production method

Abstract

A metal powder production method comprises the steps of melting metal, atomizing and the like, wherein a benzotriazole additive is added in the process of atomization, and the benzotriazole additive accounts for 0.005%-0.05% of the melted metal liquid in weight. According to the metal powder production method, an additive is selected in the process of metal power production in an atomization method, the properties of the addictive, the interaction between the additive and the metal and the favorable environment of atomization are used, and therefore the additive is atomized to form a protective layer which can avoid oxidation and caking on the surface of the metal powder. Metal powder products which are produced through the metal powder production method such as lead powder, tin powder and copper powder are packed with normal packaging, the amount of returned goods caused by oxidation or caking is reduced more than 98%, and the oxidative deterioration rate of the metal powder products can be controlled within the range of 0.5%-5%. Due to the fact that the normal packaging is used, the production cost is reduced effectively, the safety of a production system is good, the returned goods rate is reduced greatly, economic benefit is remarkable, and at the same time the working environment of workers is improved, and physical and mental health of the workers is ensured.

Description

technical field [0001] The invention relates to a production method of metal powder, in particular to an atomization production method of metal powder, belonging to the technical field of metallurgy. Background technique [0002] The production of metal powder by atomization method is a widely used technology, and the application range of products is also quite wide. At present, the production of metal powder such as lead powder, tin powder, etc. adopts the gas atomization method. The basic production process is: the first step, the melting of the metal, the melting temperature is 50 ° C to 100 ° C higher than the melting point of the metal; the second step, in the In the atomization equipment, high-pressure air of 0.3MP to 1.2MP is used to atomize the metal liquid flow to produce powder that meets the corresponding specifications and requirements; the third step is to cool and collect the powder; the fourth step is to sieve the cooled powder; The fifth step, product vacuum...

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Problems solved by technology

[0003] Since the metal powder produced by the atomization method is easily oxidized and deteriorated when exposed to the air, vacuum packaging is used, but the products produced under the existing production technology have the following problems: 1. Vacuum packaging is prone to various leaks 2. Due to the difference in internal and external pressure in vacuum packaging, lead powder and tin powder are easy to agglomerate; 3. The reprocessing of oxidized and agglomerated powder increases a lot of cost, and at the same time, the volatilization and flying of powder causes Metal loss, volatilization and flying can also easily cause heavy metal poisoning

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