Rare-earth permanent magnet material mixed with bayan obo co-existence and associated crude ores and method for manufacturing rare-earth permanent magnet material

A technology of mixing rare earths and rare earth permanent magnets, which is applied in the fields of magnetic materials, inorganic materials, inductors/transformers/magnets, etc., can solve ecological environmental pollution, waste of resources, and failure to consider the natural formula attributes of rare earth elements. Achieve the effect of reducing environmental pollution and low price

Inactive Publication Date: 2015-05-20
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 ra

Method used

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  • Rare-earth permanent magnet material mixed with bayan obo co-existence and associated crude ores and method for manufacturing rare-earth permanent magnet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A kind of sintered rare earth permanent magnet material directly prepared by using Baiyan Obo co-associated raw ore mixed rare earth.

[0064] The ingredients are as follows according to Table 2:

[0065] Table 2

[0066] Element Baiyan Obo co-associated raw ore mixed rare earth Fe B weight percentage 35 64 1

[0067] 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. ...

Embodiment 2

[0072] Table 4

[0073] method B r (kGs) h cj (kOe) BH max (MGOe) Rare ore mixed rare earth 11.23 7.02 18.37 Ordinary mixed rare earth 10.65 5.87 15.38

[0074] 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

[0076] table 5

[0077] method Ce content La content B r (kGs) h cj (kOe) BH max (MGOe) Add La alone 0.9% 11.1 8.91 25 Add Ce alone 35% 11.36 6.47 25.94 Baiyun Obo co-associated raw ore mixed rare earth magnet 18.75% 9.06% 11.33 8.69 25.92

[0078] 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 invention relates to a rare-earth permanent magnet mixed with bayan obo co-existence and associated crude ores and a method for manufacturing the rare-earth permanent magnet. Compositions of the rare-earth permanent magnet are shown as a following formula of MM<x>Fe<y>A<z>B, the x is larger than or equal to 2 and is smaller than or equal to 2.5, the y is larger than or equal to 11 and is smaller than or equal to 14, the z is larger than or equal to 0 and is smaller than or equal to 0.6, the MM represents rare-earth mixed with the bayan obo co-existence and associated crude ores, and the A represents nanometer auxiliary alloy which includes one type of Nd elements, Pr elements, Al elements and Cu elements or a plurality of types of the Nd elements, the Pr elements, the Al elements and Cu elements. The rare-earth permanent magnet can be manufactured by the aid of a powder metallurgy technology and rapid quenching and thermal pressure and thermal deformation technologies. The rare-earth permanent magnet and the method have the advantages that the novel resource-saving rare-earth permanent magnet which is developed from the rare-earth mixed with the bayan obo co-existence and associated crude ores can replace the traditional rare-earth permanent magnet and is low in cost, and environmental pollution can be reduced; the magnetic energy product scope of the magnet ranges from 20MGOe to 40MGOe, and applicable scope gaps of ferrites and SmCo rare-earth permanent magnets can be effectively filled.

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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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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