Production method of metal lead powder applied in nuclear engineering field

Abstract

Provided is a production method of metal lead powder applied in the nuclear engineering field. The production method includes steps of metal melting and metal atomization. The temperature of melting lead liquid is controlled at about 470-490 celsius degrees in the process of metal melting. Thiazole additive is added in the process of metal atomization, and the addition amount of the thiazole additive is 0.02%-0.07% of the melted metal lead liquid. High-pressure air flows into the metal atomization process is controlled at 9-10.5 cubic meters per minute. According to the production method of metal lead powder applied in the nuclear engineering field, a kind of additive is chosen in the process of metal lead powder production through atomization, and self property of the additive, interaction between the additive and metals, and the advantageous environment of atomization are utilized, so that the additive is gasified to form a protective layer on the metal lead powder surface to prevent oxidation and agglomerate. Lead powder products produced by using the method and with conventional packing, oxidation rate of the metal lead powder products can be effectively controlled at 0.5% -4%. With the conventional packing, production cost is effectively lowered and security of production system is good. Return rate is greatly reduced, and economic benefit is remarkable.

Description

technical field [0001] The invention relates to a production method of metal powder, in particular to an atomization production method of metal lead powder, belonging to the technical field of metallurgy. Background technique [0002] At present, the production of metal lead powder adopts the gas atomization method, and its 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 atomization equipment, use 0.3MP~1.2MP high-pressure air atomizes 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 is to vacuum the product Package. [0003] Since the metal lead powder produced by the atomization method is easily oxidized and deteriorated when exposed to the air, vacuum packaging is used, but t...

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Problems solved by technology

[0003] Since the metal lead 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 conditions 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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