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Method for recycling boned neodymium iron boron permanent magnet defective product

A technology for defective products and permanent magnets, which is applied in the field of recycling of defective bonded rare earth permanent magnets, and can solve the problem that defective products of bonded NdFeB permanent magnets cannot be recycled.

Inactive Publication Date: 2011-06-22
上海三环磁性材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to solve the technical problem that defective bonded NdFeB permanent magnets cannot be recycled, so as to achieve the purpose of reducing the production cost of the enterprise

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] The specific embodiment of the present invention is to remove the organic paint attached to the surface of the defective bonded NdFeB permanent magnet, and initially break it; then remove the organic paint and other sundries, and add antirust liquid to prevent the magnet from Regenerate rust; then dry the magnetic powder in a nitrogen environment to prevent the oxidation of the magnetic powder; finally, crush the dried magnet to a powder with a suitable particle size; the powder becomes the raw material powder that can produce bonded NdFeB magnets, Thereby realizing recycling and reducing the production cost of the enterprise.

[0024] The specific implementation manner of the present invention will be described in detail below in conjunction with specific examples.

[0025] The recycling method of the bonded NdFeB permanent magnet defective product of the specific embodiment of the present invention comprises the following steps:

[0026] Step 1: Put the defective bon...

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Abstract

The invention provides a method for recycling a boned neodymium iron boron permanent magnet defective product, which comprises the following steps of: putting the boned neodymium iron boron permanent magnet defective product into a ball milling tank, adding deionized water and antirust liquid into the ball milling tank, and tumbling the boned neodymium iron boron permanent magnet defective product by using a centrifugal tumbling mill; putting the tumbled defective product into the mixed solution of the deionized water and the antirust liquid for cleaning; putting the cleaned defective product into a drying furnace, charging protective gas into the drying furnace, and drying the cleaned defective product; and putting the dried defective product into the ball milling tank, crushing the dried defective product by using a ball mill, and then screening the crushed defective product by using a screen to obtain powder with proper particle size. The powder can become a raw material for producing a boned neodymium iron boron permanent magnet, so recycle is realized, and the purpose of reducing the production cost of an enterprise is fulfilled.

Description

technical field [0001] The invention relates to a method for recycling defective bonded rare earth permanent magnets, in particular to a method for recycling defective bonded NdFeB permanent magnets. Background technique [0002] NdFeB permanent magnets are the latest generation of permanent magnets, and they are also the permanent magnets with the highest comprehensive performance known now. Since the appearance of NdFeB permanent magnet materials, it has developed extremely rapidly and has become an indispensable functional material in modern industry. [0003] According to different production processes, NdFeB permanent magnets are divided into sintered NdFeB permanent magnets and bonded NdFeB permanent magnets. Generally speaking, sintered NdFeB permanent magnets have the highest magnetic energy product and excellent magnetic properties. They are mainly used in permanent magnet motors, generators, nuclear magnetic resonance imaging instruments, magnetic separators, audi...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
Inventor 卢冯昕项友生周秋东龚晖饶晓雷李纲
Owner 上海三环磁性材料有限公司
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