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Metal lead powder production method

A production method and metal lead technology are applied in the production of metal powder and the atomization production of metal lead powder, which can solve the problems of lead powder and tin powder being easy to agglomerate, poisoning by heavy metals, easy to oxidize and deteriorate, etc., and improve the working environment. , The production cost is reduced, and the economic benefit is remarkable.

Active Publication Date: 2013-06-05
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment 1

[0017] A kind of production method of metallic lead powder, carry out according to the following steps:

[0018] a. Dissolving in a metal melting furnace to obtain a metal lead liquid flow, the temperature of the molten lead liquid is controlled at 430-436°C;

[0019] b. The diameter of the metal lead liquid added in the atomization process is 5-5.5mm; the pressure is 0.3-0.5Mpa, and the air flow is 6-6.5m 3 The high-pressure air of / min is fed into the atomizing equipment to atomize the metal lead liquid flow, and simultaneously feeds the benzotriazole additive, and the added amount of the benzotriazole additive accounts for 10% of the metal liquid flow weight entering the atomizing equipment 0.002% to 0.004%, the addition temperature of the benzotriazole additive is 264 to 275°C and the pressure is 0.8 to 0.95 standard atmospheres;

[0020] c. Cool to normal temperature and collect powder;

[0021] d. Sieved, packaged into bags for standby or for sale.

[0022] The above ...

Embodiment 2～6

[0023] Embodiment 2~6: Produce metal powder according to following steps and process, all the other are the same as embodiment 1.

[0024]

[0025] The oxidative deterioration rate of the 0.1-4mm grade metal lead powder prepared by the above method is only 1.2-3%, and it is conventionally packaged, and the economic benefit is remarkable; the safety is good in the preparation process.

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Abstract

A metal lead powder production method comprises the steps of melting metal, atomizing and the like, wherein the temperature of fusing lead liquid in a metal melting process is controlled at around 425-440 DEG C, a benzotriazole additive is added in the process of atomization, the benzotriazole additive accounts for 0.001%-0.005% of the melted metal lead liquid in weight, and high pressure air flow which is added in the process of the atomization is controlled at about 5-6.5 m <3> / minute (min). According to the metal lead powder production method, an additive is selected in the process of metal lead 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 lead powder. Metal lead powder products which are produced through the metal lead powder production method are packed with normal packaging, and the oxidative deterioration rate of the metal lead powder products can be controlled within the range of 0.5%-3.5%. Due to the fact that the normal packaging is used, the production cost is reduced effectively, the safety of a production system is good, returned goods rate is reduced greatly, 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...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 曾明军刘强莫正彬
Owner CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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