A method for improving the grinding efficiency of permanent magnet ferrite calcined material

A technology of permanent magnet ferrite and calcined material, which is applied in grain processing, etc., can solve the problems of high cost, shortened grinding time, narrow application range, etc., and achieve the effect of improving grinding efficiency, improving grinding efficiency, and reducing surface free energy
CN110975996BActive Publication Date: 2022-03-22HUNAN AEROSPACE MAGNET & MAGNETO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN AEROSPACE MAGNET & MAGNETO
Publication Date
2022-03-22

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Abstract

A method for improving the grinding efficiency of permanent magnet ferrite calcined material. The method of the invention is to add ferric chloride or ferrous chloride to the calcined material before wet grinding, and then wet grind to obtain slurry. During the grinding process of permanent magnet ferrite calcined powder, due to the gradual refinement of the powder particles, the specific surface area and surface energy of the particles increase, the viscosity of the slurry increases, and the fluidity becomes poor, resulting in a decrease in grinding efficiency. The ferric chloride or ferrous chloride added by the method of the present invention can be adsorbed on the surface of the slurry particles during the grinding process, significantly reducing the surface energy of the slurry particles, overcoming the attraction between the particles, reducing the crushing resistance, and improving the slurry particle size. Fluidity, thereby improving grinding efficiency.
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Description

technical field

[0001] The invention relates to the technical field of permanent magnet ferrite preparation, in particular to a method for improving the grinding efficiency of permanent magnet ferrite calcined material. Background technique

[0002] Permanent magnetic material, also known as hard magnetic material, is a material that can provide a constant magnetic field to the outside world after magnetization. It is mainly used in various motors and generators. The main process of manufacturing permanent ferrite magnets includes: metering of pre-sintered materials and formulas-grinding powder making-magnetic field forming-high temperature sintering-grinding and packaging.

[0003] In recent years, with the tightening of energy-saving and environmental protection regulations and the demand for equipment miniaturization and light weight, the demand for high-performance ferrite has continued to expand. Due to the magnetic properties of permanent ferrite and single-domain part...

Claims

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