A waste treatment process for magnet processing

A technology for waste treatment and magnets, which is applied in the direction of magnetic objects, grain treatment, magnetic materials, etc., can solve the problems of low efficiency of magnet waste treatment, performance degradation of NdFeB magnets, and low recovery rate of magnet waste, so as to improve the utilization of waste resources rate, reduce contact opportunities, and reduce the effect of oxidation

Active Publication Date: 2021-11-16
安徽万磁电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a waste treatment process for magnet processing, which solves the problem that the recovery rate of magnet waste in the prior art is not high, and the performance of the new NdFeB magnet obtained is reduced; at the same time, the magnet is solved In the waste powder making process, the process is complicated and the operation is cumbersome, and the magnet waste in blocks cannot be directly processed into magnet powder, which makes the treatment efficiency of magnet waste low.

Method used

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  • A waste treatment process for magnet processing

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Embodiment 1

[0040] A waste treatment process for magnet processing, specifically comprising the following steps:

[0041] Step S1, waste pretreatment: take the magnet waste, put it into the ultrasonic cleaning tank, add detergent aqueous solution to the ultrasonic cleaning tank, the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then perform ultrasonic cleaning for 15 minutes; Rinse the cleaned magnet waste with clean water for 3 minutes, then put the magnet waste into the oven, set the oven at 100°C, and bake for 30 minutes;

[0042] Step S2, grinding and making powder: take the magnet waste processed in step S1, add it to the magnet crushing and grinding equipment, and grind it into a 3.5 μm magnet powder under the protection of an inert gas, add a lubricant to the magnet powder and mix, the lubricant The amount added is 0.02% of the mass of the magnet powder;

[0043] Step S3, magnetic field molding: Add the crushed and mixed magnet powder in step S2 to...

Embodiment 2

[0049] A waste treatment process for magnet processing, specifically comprising the following steps:

[0050] Step S1, waste pretreatment: take the magnet waste, put it into the ultrasonic cleaning tank, add detergent aqueous solution to the ultrasonic cleaning tank, the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then perform ultrasonic cleaning for 18 minutes; Rinse the cleaned magnet waste with clean water for 4 minutes, then put the magnet waste into the oven, set the oven at 150°C, and bake for 35 minutes;

[0051] Step S2, grinding and making powder: Take the magnet waste processed in step S1, add it to the magnet crushing and grinding equipment, and grind it into a 4 μm magnet powder under the protection of an inert gas, add a lubricant to the magnet powder and mix it, add the lubricant The amount is 0.02% of the mass of the magnet powder;

[0052] Step S3, magnetic field molding: Add the crushed and mixed magnet powder in step S2 to ...

Embodiment 3

[0058] A waste treatment process for magnet processing, specifically comprising the following steps:

[0059] Step S1, waste pretreatment: take the magnet waste, put it into the ultrasonic cleaning tank, add detergent aqueous solution to the ultrasonic cleaning tank, the volume ratio of the magnet waste to the detergent aqueous solution is 1:2, and then perform ultrasonic cleaning for 20 minutes; Rinse the cleaned magnet waste with clean water for 5 minutes, then put the magnet waste into the oven, set the oven at 200°C, and bake for 40 minutes;

[0060] Step S2, grinding and making powder: Take the magnet waste processed in step S1, add it to the magnet crushing and grinding equipment, and grind it into a 5 μm magnet powder under the protection of an inert gas, add a lubricant to the magnet powder and mix it, add the lubricant The amount is 0.02% of the mass of the magnet powder;

[0061] Step S3, magnetic field molding: put the crushed and mixed magnet powder in step S2 int...

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Abstract

The invention discloses a waste treatment process for magnet processing, which specifically comprises the following steps: step S1, waste pretreatment; step S2, grinding and making powder; step S3, magnetic field forming; step S4, vacuum sintering; and the magnet used in step S2 Crushing and grinding equipment, including powder milling device, air pump, base, reducer, coupling, main motor, discharge pipe and storage box, with an air pump on one side of the base and a reducer in the center of the base, the base is far away from the air pump There is a main motor on one side, and there is a coupling between the main motor and the reducer. One end of the coupling is fixedly connected to the input shaft of the reducer, and the other end of the coupling is fixedly connected to the output end of the main motor. The grinding device is installed Above the base, there is a discharge pipe between the powder milling device and the storage box, and the storage box is filled with nitrogen; the invention solves the problem of low recovery rate of magnet waste and solves the problem that the magnet waste cannot be recycled into powder during the powder making process. The problem of directly processing the block magnet waste into magnet powder.

Description

technical field [0001] The invention belongs to the technical field of magnet waste treatment, and in particular relates to a waste treatment process for magnet processing. Background technique [0002] NdFeB magnet itself is relatively brittle, and a lot of waste will be generated during the production and processing process, and NdFeB magnet itself is a relatively expensive material. The generation of a large amount of waste will greatly increase the production cost, and the waste itself will also bring pollution. Moreover, the rare earth materials are non-renewable resources. From the perspective of improving economic effects, protecting the environment and saving resources, it is imperative to make full use of NdFeB magnet waste. [0003] At present, there are many methods for recycling NdFeB magnet waste, such as: 1. Remelting the waste, and then re-sintering through a series of processes to obtain new NdFeB magnets; 2. After the waste is crushed by hydrogen, its compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C4/08B02C15/04B02C23/32B08B3/12B08B3/08B22F3/16B22F9/04H01F1/057
CPCB02C4/08B02C15/04B02C23/32B08B3/08B08B3/12B22F3/16B22F9/04B22F2009/047H01F1/057
Inventor 唐睿李斌韩幸奇
Owner 安徽万磁电子股份有限公司
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