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

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...

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

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