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Method for preparing anti-oxidation tin powder

A technology of tin oxide powder and atomization equipment is applied in the field of preparation of anti-oxidation tin powder, which can solve the problems of tin powder and tin powder being easy to agglomerate, poisoning by heavy metals, easy to oxidize and deteriorate, etc. Economically significant effect

Active Publication Date: 2016-07-06
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] 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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  • Method for preparing anti-oxidation tin powder

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Effect test

Embodiment 1

[0017] A preparation method of anti-oxidation tin powder, carried 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.

[0022] The above m...

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 a method for preparing anti-oxidation tin powder. The method includes steps of melting metal; atomizing the metal and the like. The tin liquid fusing temperatures are 295-310 DEG C under the control in metal melting procedures, benzotriazole additives are added into the metal in atomizing procedures, the addition of the benzotriazole additives accounts for 0.005%-0.008% of the weight of molten metal tin liquid, and the air flow of filled high-pressure air is approximately 7-8.2 m<3> / min under the control in the atomizing procedures. The method has the advantages that a type of additives is selected in procedures for producing the metal tin powder by the aid of atomizing processes, and the additives can be gasified to form oxidation and caking preventive protection layers on the surface of the metal tin powder by the aid of properties of the additives, mutual effects of the additives and the metal and favorable atomizing environments; the oxidation deterioration rates of conventionally packaged metal tin powder products produced by the aid of the method can be 0.8%-3.5% under the effective control, the conventional packaging and production costs can be effectively reduced, production systems are good in safety, the return rate can be lowered to a great extent, and method has an obvious economic benefit.

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 the preparation of metal powder, in particular to a preparation method of anti-oxidation tin powder. Background technique [0003] 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 are...

Claims

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Application Information

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