Method for manufacturing powder through neodymium iron boron alloy

A neodymium-iron-boron and alloy technology is applied in the field of neodymium-iron-boron alloy preparation, which can solve problems such as large damage of jet mill equipment, waste of materials, skin corrosion, etc., to improve product performance, improve the use of equipment, and control production. cost effect

Active Publication Date: 2014-01-22
ARCFL TECHNOLOGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, general-purpose additives have a pungent smell, are corrosive to the skin, and cannot be directly contacted. At the same time, they are very damaging to the jet mill equipment, corrode the rubber components in the equipment, and often cause air leakage from the equipment due to damage to the rubber components. Increase safety haz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prefabricated anti-oxygen lubricant: Weigh zinc stearate, diethylene glycol monobutyl ether, myristic acid, and solvent oil in a mass ratio of 20: 20: 30: 30, stir and mix at 30°C for 2 hours to make them fully mixed A composition oxygen-resistant lubricant is obtained.

[0024] Prefabricated lubricant: Weigh isopropanol, zinc stearate, zinc borate grease, and solvent oil in a mass ratio of 20: 20: 30: 30, stir and mix at 30°C for 2 hours, and make them fully mixed to obtain a lubricant composition agent.

[0025] Coarse powder product 580kg obtained by hydrogen crushing, add its mass ratio 0.15% oxygen-proof lubricant under the protection of nitrogen, mix for 2.5 hours and pass through jet mill, grinding weight 45kg, grinding pressure 0.55Mp, oxygen content 0ppm, rotating speed 3250 rpm, powder making The average particle size is 3.1, D90 / D10 is 4.8, and the powder output speed is 298kg / h. After grinding, add 0.15% lubricant and mix for 2.5 hours. The laser particle s...

Embodiment 2

[0027] Prefabricated anti-oxidant lubricant: Weigh zinc stearate, diethylene glycol monobutyl ether, myristic acid, and solvent oil in a mass ratio of 22:18:33:27, stir and mix at 30°C for 2 hours to make them fully mixed A composition oxygen-resistant lubricant is obtained.

[0028] Prefabricated lubricant: Weigh isopropanol, zinc stearate, zinc borate grease, and solvent oil in a mass ratio of 18: 22: 27: 33, stir and mix at 30°C for 2 hours, and make it fully mixed to obtain a lubricant composition agent.

[0029] Coarse powder product 580kg obtained by hydrogen crushing, add its mass ratio 0.2% oxygen-proof lubricant under the protection of nitrogen, mix for 2.5 hours and pass through jet mill, grinding weight 45kg, grinding pressure 0.55Mp, oxygen content 0ppm, rotating speed 3250 rpm, powder making The average particle size is 3.1, the D90 / D10 is 4.81, and the powder output speed is 290kg / h. After grinding, add 0.3% lubricant and mix for 2.5 hours. The laser particle si...

Embodiment 3

[0031] Prefabricated anti-oxidant lubricant: Weigh zinc stearate, diethylene glycol monobutyl ether, myristic acid, and solvent oil in a mass ratio of 18: 22: 27: 33, stir and mix at 30°C for 2 hours to make them fully mixed A composition oxygen-resistant lubricant is obtained.

[0032] Prefabricated lubricant: Weigh isopropanol, zinc stearate, zinc borate grease, and solvent oil respectively according to the mass ratio of 22:18:33:27, stir and mix at 30°C for 2 hours, and make them fully mixed to obtain the composition lubricant agent.

[0033] Coarse powder product 580kg obtained by hydrogen crushing, add its mass ratio 0.3% oxygen-proof lubricant under the protection of nitrogen and mix for 2.5 hours and pass through jet mill, grinding weight 45kg, grinding pressure 0.55Mp, oxygen content 0ppm, rotating speed 3250 rpm, powder making The average particle size is 3.0, the D90 / D10 is 4.82, and the powder output speed is 292kg / h. After grinding, add 0.2% lubricant and mix for ...

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Abstract

The invention provides a method for manufacturing powder through neodymium iron boron alloy and belongs to the technical field of neodymium iron boron alloy preparation. The method is characterized by including the steps of adding an anti-oxygen lubricant accounting for 0.05-0.5% of neodymium iron boron coarse powder by mass after the neodymium iron boron coarse powder is placed into a powder mixing tank, obtaining fine powder through a jet milling process, then adding a lubricant accounting for 0.05-0.5% of the fine powder by mass, and performing mixing, molding and sintering to obtain the powder. The anti-oxygen lubricant is formed by mixing zinc stearate, diethylene glycol monobutyl ether, myristic acid and megilp according to the mass ratio of (1-50): (1-50): (1-70): (1-70), and the lubricant is formed by mixing isopropyl alcohol, zinc stearate, zinc borate ester and megilp according to the mass ratio of (1-50): (1-50): (1-70): (1-70). According to the method, in the process for manufacturing the powder through the neodymium iron boron alloy, corrosivity of the additives can be eliminated, meanwhile orientation in the compression process is improved, and the powder outgoing velocity in the jet milling process is increased.

Description

technical field [0001] The invention discloses a method for producing NdFeB alloy powder, which belongs to the technical field of NdFeB alloy preparation. Background technique [0002] At present, with the popularization and application of adding antioxidants and lubricants in the sintered NdFeB magnet manufacturing industry, adding antioxidants and lubricants to NdFeB alloy powder has a great impact on the performance of sintered NdFeB magnets. How to choose The composition and amount of additives will affect the uniformity and profile orientation of NdFeB powder, which is of great significance to the preparation of high-performance NdFeB magnets. At present, general-purpose additives have a pungent smell, are corrosive to the skin, and cannot be directly contacted. At the same time, they are very damaging to the jet mill equipment, corrode the rubber components in the equipment, and often cause air leakage from the equipment due to damage to the rubber components. Increase...

Claims

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Application Information

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IPC IPC(8): B22F1/00H01F1/057
Inventor 李宁
Owner ARCFL TECHNOLOGY LIMITED
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