Method for recycling samarium-cobalt permanent magnet material waste
A permanent magnet material, samarium-cobalt technology, applied in the field of materials, can solve the problems of no easy recovery and regeneration method of samarium-cobalt permanent magnets, high price, low reserves, etc., and achieve the effect of fast recovery cost, small investment and pollution reduction
Inactive Publication Date: 2016-01-20
绵阳德华磁材有限公司
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Problems solved by technology
[0004] Since samarium, the main component of samarium cobalt magnets, has low reserves on the earth, its price is very expensive. For the use of scrapped samarium cobalt permanent magnets, there is no easy-to-achieve recycling method for samarium cobalt permanent magnets
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[0018] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0019] The samarium-cobalt permanent magnet waste recycling method of the present invention comprises the following steps:
[0020] step 1. Configure raw materials, the raw materials are composed of samarium cobalt permanent magnet waste and metal mixture, the metal mixture contains 23-27% samarium, 46-54% cobalt, 12-17% iron, 3-8% copper, 1- 5%, in the raw materials, the samarium cobalt permanent magnet waste content is 20-60%, and the above percentages are weight ratios;
[0021] The samarium-cobalt permanent magnet waste is waste in the manufacturing process of samarium-cobalt permanent magnets, which is mainly made of samarium-cobalt permanent magnet raw materials, such as cutting debris and cutting powder. The indicators caused by improper post-processing do not meet the requirements, but the material group Points are still w...
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Abstract
The invention discloses a method for recycling samarium-cobalt permanent magnet material waste. The method comprises the following steps of step 1 preparing raw materials formed by samarium-cobalt permanent magnet waste and a metal mixture, wherein the metal mixture includes 23-27% of samarium, 46-54% of cobalt, 12-17% of iron, 3-8% of copper and 1-5% of zirconium, and the content of the samarium-cobalt permanent magnet waste in the raw materials is 20-60%; step 2 preparing powder after smelting ingredients, and accurately grinding to obtain particles with the particle size of 4-7 u after preparing the powder; step 3 sintering after treating and shaping the particles; step 4 successively carrying out heat treatment twice after sintering, wherein the temperature is at 1200-1300 DEG C at the first time and the temperature is at 800-900 DEG C at the second time; and step 5 detecting and magnetizing after naturally cooling. According to the method, the scrapped permanent magnet material can be recycled, the obtained permanent magnet material recycling product can be normally used, the pollution of the permanent magnet raw material to the environment is reduced, and the method has considerable economic benefit and environmental benefit.
Description
technical field [0001] The invention belongs to the field of materials, and relates to a permanent magnet material processing method, in particular to a samarium cobalt permanent magnet material waste recycling method. Background technique [0002] A magnet that can maintain its magnetism for a long time is called a permanent magnet. Such as natural magnetite (magnetite) and artificial magnets (alnico) and so on. In addition to permanent magnets, there are also electromagnets that need to be energized to be magnetic. Permanent magnets are also called hard magnets, which are not easily demagnetized or magnetized. However, if the permanent magnet is heated above the Curie temperature, or placed in an environment with a reverse high magnetic field strength, its magnetism will also decrease or disappear. [0003] Samarium cobalt magnets are the second generation of rare earth permanent magnets, mainly divided into 1:5 type (SmCo5) and 2:17 type (Sm2Co17). Its main features a...
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Login to View More IPC IPC(8): H01F41/02H01F1/055B22F3/16B22F9/04
Inventor 钟宣平
Owner 绵阳德华磁材有限公司