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Multiphase permanent magnet material for waste recycling and preparation method thereof

A technology of permanent magnet materials and waste materials, which is applied in the field of recycling multi-phase permanent magnet materials and their preparation, can solve the problem of low maximum magnetic energy product value, and achieve the effects of improved magnetic properties, high social value, and improved environment

Active Publication Date: 2018-10-02
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this material is that the maximum magnetic energy product value is not high

Method used

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  • Multiphase permanent magnet material for waste recycling and preparation method thereof
  • Multiphase permanent magnet material for waste recycling and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the multi-phase permanent magnet material reused by the waste material of the present invention comprises the following steps:

[0036] 1) Waste disposal:

[0037] First, first place the phosphor waste material in a roasting furnace for pretreatment, the treatment temperature is 600 ° C, the holding time is 2 hours, and after cooling, the ball mill is 20-80 microns to obtain the pretreatment waste material; the pretreatment waste material is added to a concentration of Mix in 5mol / L sulfuric acid. The mixture is first kept at 55°C for 7 hours, and then kept at 98°C for 1.5 hours. The mass ratio of pretreatment waste to sulfuric acid is 1:40. After cooling, soak it with water for 5 times and collect the precipitate. , and dried at a temperature of 120° C. for 1.5 hours, and then placed at a temperature of 1100° C. for 1.5 hours. After cooling, the precipitated rare earth oxide A containing Y, Ce, Tb, and Eu was obtained for subsequent use;

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Embodiment 2

[0048] The preparation method of the multi-phase permanent magnet material reused by the waste material of the present invention comprises the following steps:

[0049] 1) Waste disposal:

[0050] First, first place the phosphor waste material in a roasting furnace for pretreatment, the treatment temperature is 500 ° C, the holding time is 1 hour, and after cooling, the ball mill is 20-80 microns to obtain the pretreatment waste material; the pretreatment waste material is added to a concentration of Mix in 3 mol / L sulfuric acid, heat the mixture at 45°C for 5 hours, then heat it at 90°C for 1 hour, the mass ratio of pretreatment waste to sulfuric acid is 1:30, soak it with water for 3 times after cooling, and collect the precipitate , and dried at a temperature of 120°C for 1 hour, and then kept at a temperature of 1050°C for 1 hour, and after cooling, precipitated rare earth oxide A was obtained, which was set aside;

[0051] Second, the polishing powder waste is placed in ...

Embodiment 3

[0061] In this example, the rare earth permanent magnet material alloy ingot prepared by waste recycling is batched according to the following mass percentages:

[0062] Nd 27%, Y 2.7%, Ce 2.7%, Tb 0.27%, Eu 0.27%, La 0.27%, Pr 0.27%, B 3%, V 0.27%, W 2.3%, and the rest is Fe. All the other preparation conditions and processes are the same as in Example 2. The mass percent content of N in the material is 1.08%.

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Abstract

The invention provides a waste-material-recycled multi-phase permanent magnet material and a preparation method therefor. The permanent magnet material has relatively high maximum magnetic energy product performance and coercivity. The preparation method is simple in process, low in production cost, and suitable for realizing industrial production. The permanent magnet material comprises the following components based on mass percentage: 25-30% of Nd, 2.5-3.0% of Y, 2.5-3.0% of Ce, 0.25-0.30% of Tb, 0.25-0.30% of Eu, 0.25-0.30% of La, 0.25-0.30% of Pr, 2-4% of B, 1.0-1.2% of N, 0.25-0.30% of V, 2.1-2.5% of W and the balance of Fe; and the 1.0-1.2% of N based on mass percentage is included in the material.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a multi-phase permanent magnet material for recycling waste materials and a preparation method thereof. Background technique [0002] Application No. CN201510097712.4 relates to a rare earth permanent magnet made of mixed rare earth from Baiyun Obo co-associated raw ore and its preparation method. The composition of the rare earth permanent magnet is shown in the following formula: MM x Fe y A z B, 2≤x≤2.5, 11≤y≤14, 0≤z≤0.6, MM is Baiyun Obo co-associated raw ore mixed rare earth, A is nano auxiliary alloy, including one or more of Nd, Pr, Al, Cu elements kind. The rare earth permanent magnet can be realized by using powder metallurgy technology, quick quenching-hot pressing and hot deformation technology. This method utilizes Baiyun Obo raw ore mixed rare earth to develop a new type of resource-saving rare earth permanent magnet to replace the traditional rare earth permanent ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057
CPCH01F1/0576H01F1/0577
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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