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High-purity magnesium powder preparing method

A powder preparation, high-purity technology, used in metal processing equipment, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easy clogging of atomizing nozzles, high energy consumption of atomization, and complex equipment. , to achieve the effect of rapid large-scale application, shortened production cycle, and simple equipment

Inactive Publication Date: 2017-11-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention proposes a method for preparing high-purity magnesium powder. The preparation process of the present invention is extremely simple, consumes less energy, can realize large-scale powder preparation and production, and solves the problems of low production efficiency and low product purity in the prior art. The magnesium powder prepared at the same time has a small particle size and concentrated distribution, and is a nano-scale high-purity powder
[0007] The problems that the present invention can solve: (1) the existing mechanical ball milling method has long ball milling time and low production efficiency; (2) the existing atomization method has high energy consumption, wide range of powder particle size distribution, poor product quality and low sphericity Ideal, the atomizing nozzle is easy to block during production, and the powder is generally in the micron level; (3) The equipment involved in the existing method is complicated and the cost is high

Method used

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  • High-purity magnesium powder preparing method
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Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Loading. Put 30g of magnesium ingot into a ceramic boat, roll graphite carbon paper into it, put it into a corundum tube, and put the corundum tube into a tube furnace. The two ends are respectively connected with the gas control valve and the vacuum pump.

[0028] (2) Gas washing. First evacuate the inside of the tube to -0.1MPa, and then pass high-purity inert gas to 0.1MPa to complete a "gas wash". Enter flowing high-purity inert gas, and set the flow rate to 3LPM.

[0029] (3) Sublimation condensation and product collection. Raise the temperature to 1200°C so that the magnesium block is sublimated into magnesium vapor in a continuously flowing inert gas environment, and the magnesium vapor is brought into the condensation zone through the flowing inert gas, and the solidification temperature in the condensation zone is controlled below 400°C (preferably 200-400°C) , Magnesium vapor condenses and solidifies in the condensation zone to form powder, keep warm u...

Embodiment 2

[0031] (1) Loading. Put 30g of coarse magnesium into a ceramic boat, roll graphite carbon paper into it, put it into a corundum tube, and put the corundum tube into a tube furnace. The two ends are respectively connected with the gas control valve and the vacuum pump.

[0032] (2) Gas washing. First evacuate the inside of the tube to -0.1MPa, and then pass high-purity inert gas to 0.1MPa to complete a "gas wash". Into the flow of high-purity inert gas, the flow rate is set to 10LPM.

[0033] (3) Sublimation condensation and product collection. Raise the temperature to 1200°C so that the magnesium block is sublimated into magnesium vapor in a continuously flowing inert gas environment, and the magnesium vapor is brought into the condensation zone through the flowing inert gas, and the solidification temperature in the condensation zone is controlled below 400°C (preferably 200-400°C) , Magnesium vapor condenses and solidifies in the condensation zone to form powder, keep wa...

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Abstract

The invention discloses a high-purity magnesium powder preparing method. According to the method, a magnesium block is heated at 1100 DEG C to 1300 DEG C, sublimates in a continuous circulation inert gas environment, and is cooled to the room temperature after heat preservation is kept for a certain time, and high-purity magnesium powder is obtained at the position of a collecting device of a condensation zone. By controlling the temperature and the inert gas flowing speed, the powder size can be effectively regulated and controlled, and the yield is improved. Compared with a traditional powder preparing method, the high-purity magnesium powder preparing method is easy, convenient, practical, short in period, low in cost, small in powder size, high in purity and capable of achieving low-cost short-period large-batch and high-purity magnesium powder preparing.

Description

technical field [0001] The invention relates to the technical field of metal powder preparation, in particular to a method for preparing high-purity magnesium powder. Background technique [0002] Magnesium powder has a large specific surface area and strong surface activity. It can be used to manufacture chemical products, explosives, fireworks, etc. It can also be used as a reducing agent, desulfurizer, and 3D printing raw material. It is widely used in military industry, aerospace industry, steelmaking industry and non-ferrous metals Casting and other fields. The existing methods of preparing magnesium powder mainly include mechanical ball milling and atomization. The production efficiency of the mechanical ball milling method is low, the powder is easily oxidized, and the product purity is low; the powder produced by the atomization method has a wide particle size distribution range and a low spherical rate; and the particles obtained by the two methods are mostly micro...

Claims

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Application Information

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IPC IPC(8): B22F9/12B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/12B22F1/054
Inventor 单智伟李姣刘飞刘博宇
Owner XI AN JIAOTONG UNIV