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Manufacturing method of ultra fine ball-shaped magnesium powder

A manufacturing method, spherical technology, applied in the research and development field of ultrafine spherical magnesium powder manufacturing method

Inactive Publication Date: 2006-06-28
YINGKOU HENGDA INDAL
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

to solve all the problems caused by existing methods

Method used

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Embodiment Construction

[0006] The present invention is realized through the following technical scheme. Firstly, metal magnesium is melted according to the prior art and equipment, and when the melting temperature reaches 700-750 DEG C, the metal magnesium becomes liquid magnesium with good fluidity. Then the liquid magnesium is sent to the atomization chamber for atomization treatment and granulation. The present invention uses nitrogen-argon mixed gas for atomization treatment. Mainly argon, mixed with an appropriate amount of nitrogen. Its ratio is:

[0007] Argon 70~75%

[0008] Nitrogen 25~30%

[0009] Other relevant data are:

[0010] Atomization temperature: 700~750℃

[0011] Spray chamber cooling water temperature: <45°C

[0012] Atomization pressure: 1.5~2.0MPa.

[0013] Nitrogen purity: >99.5%

[0014] Argon purity: >99.9%

[0015] The purity of the product produced by the method of the invention is above 98.5%, exceeding the MIL-P-14067B (MU)-1967 standard and the MIL-DTL-382D (1...

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Abstract

A process for preparing the superfinespherical Mg powder features that the mixture of N2 and argon gas is used in its atomizing step to generate a protecting layer no each Mg particle, resulting in high purity and stability.

Description

technical field [0001] The invention belongs to the research and development field of the manufacturing method of ultrafine spherical magnesium powder. Background technique [0002] At present, the production of various metal powders mostly adopts the atomization method. First, the metal is melted into a liquid with good fluidity, and then broken into tiny droplets under the action of high-pressure gas flow. After cooling in the atomization chamber, the desired metal powder is formed. In order to ensure the purity and spherical state of the metal powder, it is generally atomized with nitrogen or argon. But in the production of magnesium powder, if pure nitrogen is used for atomization treatment, at high temperature, magnesium and nitrogen undergo a chemical reaction to form magnesium nitride on the surface of magnesium powder, thereby affecting the purity of magnesium. In addition, nitrogen and magnesium react rapidly in a closed container, which can easily cause an explo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
Inventor 高长龙李新武
Owner YINGKOU HENGDA INDAL
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