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A kind of atomization production method of high-quality tin powder

A production method and high-quality technology, applied in the field of atomization production of high-quality tin powder, can solve the problems of metal loss, increased cost, tin powder and tin powder easy to agglomerate, etc., to achieve physical and mental health assurance, production cost reduction, Significant economic benefits

Active Publication Date: 2018-03-16
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the metal tin 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, tin powder and tin powder are easy to agglomerate; 3. The reprocessing of oxidized and agglomerated powder will increase a lot of cost, and at the same time, the volatilization and flying of powder will cause Metal loss, volatilization and flying can also easily cause heavy metal poisoning

Method used

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  • A kind of atomization production method of high-quality tin powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of atomization production method of high-quality tin powder, carry out according to the following steps:

[0018] a. Dissolve in a metal melting furnace to obtain a metal tin liquid flow, and the temperature of the molten tin liquid is controlled at 300-310°C;

[0019] b. The metal tin liquid flow diameter added in the atomization process is 2.5-2.8mm; the pressure is 0.6-0.7Mpa, and the air flow is 7.5-8.2m 3 The high-pressure air of / min is fed into the atomizing equipment to atomize the metal tin 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 0.006%~0.007%, the adding temperature of the benzotriazole additive is 264~275°C, and the pressure is 0.8~0.95 standard atmospheric pressure;

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

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

[00...

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 metal tin powder prepared by the above method has an oxidative deterioration rate of only 1.0-3.5%, is conventionally packaged, and has remarkable economic benefits; and the preparation process has good safety.

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Abstract

The invention discloses an atomization production method for high-quality tin powder. The atomization production method comprises the following steps: melting metal, atomizing metal, and the like, wherein the temperature of molten tin is controlled to be 295-310 DEG C in the metal melting process; a benzotriazole additive is added in the atomization process; the addition amount of the benzotriazole additive accounts for 0.005-0.008% of the weight of the molten tin; the flow rate of high-pressure air introduced in the atomization process is controlled to be about 7-8.2m<3> / minute. According to the atomization production method, an additive is selected in the process that metal tin powder is produced by using an atomization method; due to properties of the additive self, the interaction of the additive and metal and a beneficial atomization environment, the additive can be gasified on the surface of the metal tin powder to form a protecting layer for preventing oxidation or agglomeration; a tin powder product produced by using the atomization production method disclosed by the invention is packaged normally, and the oxidative deterioration rate of the metal tin powder product can be effectively controlled to be 0.8-3.5%; due to the normal package, the production cost can be effectively reduced, the production system is good in security, the rejection rate is greatly reduced, and remarkable economic benefits can be achieved.

Description

[0001] The present invention application is a divisional application for the invention patent with application number 201110385490.8 and application date of November 28, 2011. technical field [0002] The invention relates to a production method of metal powder, in particular to an atomization production method of tin powder. Background technique [0003] At present, the production of metal tin 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, using 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. Since the metal tin powder produced by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0824B22F2009/0848
Inventor 陈林马才明莫正彬
Owner CHONGQING YOUYAN ZHONGYE NEW MATERIAL