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Baiyun Obo co-associated raw ore mixed rare earth permanent magnet material and preparation method thereof

A technology of mixed rare earth and rare earth permanent magnets, applied in the fields of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc., can solve the problems of ecological environment pollution, resource waste, not considering the co-associated natural formula properties of rare earth elements, etc. Achieving the effect of low price and reducing environmental pollution

Inactive Publication Date: 2018-08-14
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional rare earth permanent magnets consume a large amount of low-abundance, resource-scarce praseodymium, neodymium, samarium, dysprosium, and terbium rare earth elements, while high-abundance lanthanum and cerium elements have not been effectively utilized and have a large backlog, resulting in unbalanced utilization of rare earth resources
Moreover, the original process did not consider the natural formula attributes of rare earth elements, and excessively pursued the purity of raw materials, which caused serious ecological environmental pollution and waste of resources in the process of rare earth mining-selection-separation purification-smelting

Method used

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  • Baiyun Obo co-associated raw ore mixed rare earth permanent magnet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A kind of sintered rare earth permanent magnet material directly prepared by using Baiyan Obo co-associated raw ore mixed rare earth.

[0063] The ingredients are as follows according to Table 2:

[0064] Table 2

[0065] Element

[0066] Using powder metallurgy technology, the raw materials containing a certain proportion, such as Baiyun Obo co-associated raw ore mixed rare earth, ferroboron, etc., are smelted into alloy steel ingots by induction melting furnace, and then crushed to make 3-5μm powder, and NdCu is added to it Nano auxiliary alloy particles, wherein the addition of NdCu nano auxiliary alloy particles is as shown in Table 3 based on the weight of the alloy steel ingot as 100%, and the weight percentage is as shown in Table 3, and it is pressed and formed in a magnetic field. After forming, it is sintered and compacted in a vacuum furnace. Temper. The magnetic performance test results of the obtained rare earth permanent magnet materials are sh...

Embodiment 2

[0071] Table 4

[0072] method

[0073] It can be seen from Table 4 of Example 2 that under the same formula and process conditions, the performance of using common mixed rare earths is far lower than that of using Baiyan Obo co-associated ore mixed rare earths.

Embodiment 3

[0075] table 5

[0076] method

[0077] From Table 5 of Example 3, it can be seen that under the condition of similar magnet performance, the utilization rate of lanthanum in the mixed rare earths in the Baiyan Obo co-associated ore is 10 times that of adding lanthanum alone, which can effectively solve the problem of comprehensive utilization of high-abundance rare earths . And the performance of using common mixed rare earths is far lower than that of using Baiyan Obo co-associated raw ore mixed rare earths.

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Abstract

The present invention relates to a rare earth permanent magnet made of mixed rare earth from Baiyun Obo co-associated raw ore and a preparation method thereof. The composition of the rare earth permanent magnet is shown in the following formula: MMxFeyAzB, 2≤x≤2.5, 11≤y≤14, 0 ≤ z ≤ 0.6, MM is Baiyan Obo co-associated raw ore mixed rare earth, A is nano auxiliary alloy, including one or more of Nd, Pr, Al, Cu elements. The rare earth permanent magnet can be realized by powder metallurgy process, rapid quenching-hot pressing and heat deformation process. The present invention proposes to develop a new type of resource-saving rare earth permanent magnet by using the mixed rare earth of Baiyun Obo raw ore to replace the traditional rare earth permanent magnet, which has the advantages of low price and reduced environmental pollution. The scope of application of ferrite and SmCo rare earth permanent magnets is blank.

Description

technical field [0001] The invention relates to the direct preparation of a rare earth permanent magnet material and a method thereof by using mixed rare earth in Baiyan Obo co-associated raw ore, and belongs to the field of rare earth permanent magnet material preparation. Background technique [0002] Rare earth permanent magnet materials are indispensable materials in the fields of national security, information, energy, and environmental protection. China is the largest producer of rare earth permanent magnet materials. According to relevant reports, the market penetration rate of NdFeB permanent magnets in traditional applications (speakers, magnetic separation, permanent magnet motors, VCM, MRI, etc.) has reached more than 50%, and the demand is in a period of steady growth, with an annual growth rate of about 10%. China is a country with large rare earth resources in the world. The rare earth content of Baotou Baiyun Obo Mine ranks first in the world. It is the most i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/053H01F1/08H01F41/02B22F3/16
Inventor 张雪峰李永峰刘艳丽李柱柏马强杜晓红王高峰赵增茹赵倩慕利娟
Owner INNER MONGOLIA UNIV OF SCI & TECH
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