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Method for preparing metal powder in atomizing manner

A technology of metal powder and atomization equipment, applied in the field of metallurgy, can solve the problems of easy agglomeration of lead powder and tin powder, heavy metal poisoning, powder oxidation, etc., and achieve the effects of improving working environment, reducing production cost and good safety.

Active Publication Date: 2016-05-18
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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 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 metal powder in atomizing manner

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Experimental program
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Effect test

Embodiment 1

[0018] A method for preparing metal powder by atomization, carried out according to the following steps:

[0019] a. Dissolving in a metal melting furnace to obtain a metal liquid flow, the melting temperature is 75-90°C higher than the melting point of the metal;

[0020] b. Pass high-pressure air with a pressure of 0.6 to 0.8Mpa into the atomization equipment to atomize the metal liquid flow, and at the same time pass into the benzotriazole additive. 0.02% to 0.03% of the weight of the metal liquid flow, the addition temperature of the benzotriazole additive is 264 to 275°C, and the pressure is 0.8 to 0.95 standard atmospheres;

[0021] c. Cool to normal temperature and collect powder;

[0022] d. Sieved, packaged into bags for standby or for sale.

[0023] Those skilled in the art can control the rest of the process parameters using conventional techniques to produce different metal powders according to the different production characteristics of each metal known in the a...

Embodiment 2～6

[0025] Embodiment 2~6: Produce metal powder according to following steps and process, all the other are the same as embodiment 1.

[0026]

[0027] The oxidative deterioration rate of the metal powder prepared by the above method is only 0.8-5%, and the conventional packaging has remarkable economic benefits; the preparation process has good safety.

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Abstract

The invention provides a method for preparing metal powder in an atomizing manner. The method comprises the steps of metal melting, atomizing and the like. In the atomizing process, a benzotriazole addition agent is added, and the quantity of the added addition agent accounts for 0.005-0.05% of the weight of molten metal. The addition agent is selected in the metal powder production process of the atomizing method, and nature of the addition agent, mutual action between the addition agent and the metal and beneficial environment for atomizing are utilized, so that the addition agent is gasified to form a protecting layer for preventing oxidization and agglomeration on the surface of the metal powder. Returns, caused by oxidization and agglomeration, of metal powder products such as lead powder, tin powder and copper powder produced by adopting the method and packaged conventionally are reduced by over 98%. The oxidative deterioration rate of the metal powder products can be effectively controlled to be 0.5-5%. By the adoption of conventional packaging, production cost is effectively reduced, safety of a production system is good, the return rate is reduced greatly, and economic benefits are remarkable. Meanwhile, working environment of staff is improved and physical and metal health is ensured.

Description

[0001] The application of the present invention is a divisional application for the invention patent with application number 201110385505.0 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 metal powder, belonging to the technical field of metallurgy. Background technique [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F1/102
Inventor 潘华陈林马才明
Owner CHONGQING YOUYAN ZHONGYE NEW MATERIAL