Multilevel quenching collecting device for producing NdFeB magnetic powder

A collection device, NdFeB technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve problems such as poor performance and consistency, inability to carry out long-term continuous production, etc., to improve production efficiency and profitability, Suppression of the formation of unfavorable phases and the effect of fine grain size

Inactive Publication Date: 2014-05-28
湖南京湘磁业有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process is to crush the ingot into 3-10mm particles with a crusher, heat and melt them in an arc overflow quenching furnace, and throw them into amorphous thin strips with a thickness of 30-50mm and a width of 1-30mm. Defects, the thin strip is made under the condition of non-thermodynamic equilibrium, its performance and consistency are not good, and it cannot be continuously produced for a long time, and continuous rapid quenching solves this problem

Method used

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  • Multilevel quenching collecting device for producing NdFeB magnetic powder
  • Multilevel quenching collecting device for producing NdFeB magnetic powder
  • Multilevel quenching collecting device for producing NdFeB magnetic powder

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Embodiment 1

[0018] Embodiment 1, the present invention comprises nozzle 1, molybdenum wheel 2, feed barrel 3, primary cooling plate 4, secondary cooling plate 5, tertiary cooling plate 6, after incoming material enters material barrel 3, in primary cooling plate 4, The flow between the secondary cooling plate 5, the tertiary cooling plate 6 and the barrel wall of the barrel 3, the molybdenum wheel 2 is installed under the nozzle 1, and the incoming material is sprayed downward from the nozzle 1 to the molybdenum wheel 2, and the incoming material is generally 1300°C The rotating molybdenum wheel 2 continuously throws the incoming material sprayed from above, and the incoming material will infiltrate a small amount of molybdenum Mo when it comes into contact with the molybdenum wheel 2. Adding molybdenum to the material can improve the elastic limit, corrosion resistance and maintain Permanent magnetism, the incoming material is initially cooled down during this process to form a high-tempe...

Embodiment 2

[0019] Embodiment 2, the inside of the first-stage cooling plate 4 is provided with a cavity for heat exchange and a cooling plate water outlet 41 and a cooling plate water inlet 42 communicating with the cavity, and continuously circulates and injects cooling water for heat exchange. The cooling plate 4 is maintained at a lower temperature. refer to Figure 1 to Figure 5 , all the other are with embodiment 1.

Embodiment 3

[0020] Embodiment 3, in the present invention, a cavity for heat exchange and a water inlet and a water outlet of the cooling plate communicated with the cavity can also be respectively provided inside the secondary cooling plate 5 and the tertiary cooling plate 6, and the cooling water can be continuously circulated and injected. Heat exchange is performed to maintain the primary cooling plate 4 at a lower temperature. refer to Figure 1 to Figure 5 , and the rest are the same as the above-mentioned embodiment.

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Abstract

A multilevel quenching collecting device for producing NdFeB magnetic powder belongs to a multilevel quenching collecting device and mainly solves the technical problems that the existing quenching device is incomplete in quenching, slow in the quenching speed and the like. The key points of the technical scheme are that the multilevel quenching collecting device for producing the NdFeB magnetic powder comprises a nozzle (1), a Mo wheel (2), a material barrel (3), a first-level cooling plate (4), a second cooling plate (5) and a third-level cooling plate (6); the Mo wheel (2) is arranged below the nozzle (1); one side, positioned in the throwing direction, of the Mo wheel (2) is provided with the material barrel (3) corresponding to a material inlet; the other side, corresponding to the material inlet, at the upper part of the material barrel (3) is provided with the downwards inclined first-level cooling plate (4); the position, positioned at the other side of the lower part of the first-level cooling plate (4), in the middle of the material barrel (3) is provided with the second-level cooling plate (5); the position, positioned at the other side of the lower part of the second-level cooling plate (5), of the lower part of the material barrel (3) is provided with the third-level cooling plate (6); a discharging port is formed in the lower part position of the material barrel (3); inert gas is injected in the multilevel quenching collecting device which is mainly used for multilevel fast quenching.

Description

technical field [0001] The invention relates to a quenching device, in particular to a multi-stage quenching collection device for the production of NdFeB magnetic powder. Background technique [0002] At present, the continuous rapid quenching process is a relatively advanced production method of NdFeB magnetic powder, and only a few enterprises have mastered the core technology of this process. The preparation of bonded NdFeB magnetic powder by the traditional arc smelting single-roll stripping method does not have very high requirements for alloy melting, but for continuous rapid quenching and stripping, the smelting requirements are higher, and high cleanliness is required, otherwise remelting The oxides and impurities in the final solution will block the nozzle and make the production impossible. Therefore, high-cleanliness smelting is the key technology of this process. This invention uses high-purity argon to protect the smelting process by heating up in a high-vacuum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22D11/06H01F1/057
Inventor 鲍宇飞李运湘
Owner 湖南京湘磁业有限公司
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