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A kind of preparation method of anti-oxidation lead powder

The technology of lead oxide and atomization equipment is applied in the field of preparation of lead powder, which can solve the problems of easy oxidative deterioration, metal loss, easy agglomeration of lead powder and tin powder, etc., and achieves good production system safety, physical and mental health assurance, The effect of improving the working environment

Active Publication Date: 2018-06-29
CHONGQING YOUYAN ZHONGYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the metal lead powder produced by the atomization method is easily oxidized and deteriorated when exposed to the air, so 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 air 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 are also likely to cause heavy metal poisoning

Method used

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  • A kind of preparation method of anti-oxidation lead powder
  • A kind of preparation method of anti-oxidation lead powder

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Effect test

Embodiment 1

[0017] A preparation method of anti-oxidation lead powder, carried 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 preparation method for anti-oxidation lead powder comprises a metal melting step, an atomizing step and the like; temperature of molten lead is controlled to be about 425 to 440 DEG C in a metal melting process; a benzotriazole additive is added in an atomizing process; addition amount of the benzotriazole additive accounts for 0.001 percent to 0.005 percent of the weight of the molten metallic lead; air flow amount of high-pressure air introduced in the atomizing process is controlled to be about 5 to 6.5 m<3> / min. According to the preparation method disclosed by the invention, by selecting the additive in a process of producing the metallic lead powder by an atomizing method and utilizing properties of the additive, interaction between the additive and metal and an enabling environment of atomizing, the additive is gasified to form a protection layer for preventing oxidation and agglomeration on the surface of the metallic lead powder; the oxidative deterioration rate of a metallic lead powder product produced by applying the method disclosed by the invention can be effectively controlled to be 0.5 percent to 3.5 percent by adopting conventional packaging; by adopting the conventional packaging, production cost is effectively reduced, safety of a production system is high, the return rate is greatly reduced, and economical benefit is remarkable.

Description

[0001] The present invention application is a divisional application for the invention patent with the application date of November 28, 2011 and the application number 201110385504.6. technical field [0002] The invention relates to a method for preparing lead powder, in particular to a method for preparing lead powder by atomization. Background technique [0003] At present, the metal lead powder produced by the atomization method is easily oxidized and deteriorated when exposed to the air, so 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 air 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, volatilizat...

Claims

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Application Information

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