Preparation process of neodymium iron boron NdFeB superfine permanent magnet powder

Abstract

The invention discloses a preparation process of neodymium iron boron (NdFeB) ultrafine permanent magnet powder , which comprises the steps of raw material treatment, vacuum melting, cooling molding,rapid crushing, rapid screening, jet milling and secondary screening, and the raw material treatment comprises raw material cleaning, and a plurality of raw materials can be flushed by clear water during cleaning; various raw materials are dried through heating equipment after being flushed, so that dust and impurities on various raw materials can be cleaned. The beneficial effects are that multiple raw materials can be treated during processing, and dust and oil on the raw materials can be treated, so purity of alloy can be prevented from being influenced; then the raw materials are smelted,cooled and formed into the alloy, and then the alloy can be crushed into small alloy particles, so that the collision type fluidized bed jet mill can conveniently and quickly crush the small alloy particles into superfine permanent magnet powder, and the overall processing efficiency is high.

Description

technical field [0001] The invention discloses a preparation process of neodymium iron boron NdFeB ultrafine permanent magnetic powder, belonging to the technical field of permanent magnetic powder preparation. Background technique [0002] With the rapid development of high-tech industries, NdFeB permanent magnet powder is widely used in aviation, aerospace, navigation, automobiles and various precision instruments, small and medium-sized, micro high-efficiency motors, computers and IT technology equipment, office automation equipment and many household appliances. Electrical appliances and other fields, and continue to expand. [0003] In the prior art, when the NdFeB NdFeB ultrafine permanent magnet powder is prepared, the grinding operation is generally carried out directly in the grinding operation, and because the overall size of the alloy is relatively large, the grinding operation is relatively slow, so that the neodymium The processing of iron boron NdFeB ultrafine...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the prior art, when the NdFeB NdFeB ultrafine permanent magnet powder is prepared, the grinding operation is generally carried out directly in the grinding operation, and the overall size of the alloy is relatively large, so that The grinding operation is relatively slow, which makes the processing of NdFeB NdFeB ultrafine permanent magnetic powder relatively slow. A preparation process for NdFeB NdFeB ultrafine permanent magnetic powder is provided to solve the above problems