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Method for batch preparation of permanent magnet ferrite secondary forming slurry by cell grinding machine

A permanent magnet ferrite, secondary molding technology, applied in inductor/transformer/magnet manufacturing, magnetic core manufacturing, electrical components, etc., can solve the problems of unfavorable material magnetic properties, wide slurry particle size distribution, and difficulty in automation. Achieve the effect of reducing magnet cracking, reducing power consumption and improving abrasive efficiency

Active Publication Date: 2019-03-26
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology

At present, the field of permanent magnet ferrite materials is mainly processed by horizontal ball mills, which can only be produced intermittently, and it is difficult to realize automation; at the same time, due to the dead angle in the ball mill tank, the particle size distribution of the resulting slurry is relatively wide, which is not conducive to improving the magnetic properties of the material.

Method used

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  • Method for batch preparation of permanent magnet ferrite secondary forming slurry by cell grinding machine
  • Method for batch preparation of permanent magnet ferrite secondary forming slurry by cell grinding machine
  • Method for batch preparation of permanent magnet ferrite secondary forming slurry by cell grinding machine

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Embodiment

[0031] Example: Batch Cell Mill Abrasive Test. The main steps are as follows: Automatically weigh 1.5T pre-fired powder from the raw material storage tank each time into the batching tank, then add 1.8T tap water, mix well and then transfer to the feeding tank for storage, batching four times continuously, the total batching is about 6T. Then the above coarse slurry is continuously pumped to the primary cell mill for primary grinding. The slurry passed through the first-stage cell mill is transferred to a transfer tank, and then pumped to the second-stage cell mill for secondary grinding. The slurry passed through the above-mentioned secondary cell mill is transferred to the discharge tank, and the water content is adjusted to about 36 wt%, and then transferred to the storage tank to obtain the required molding slurry.

[0032] The primary mill uses steel balls as the ball milling medium, the total ball capacity is 12T, and the ratio of steel balls of various sizes is: Φ8mm s...

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Abstract

The invention provides a method for the preparation of permanent magnet ferrite secondary forming slurry by a two-stage vertical cell grinding machine, the continuous grinding can be achieved, the automatic production is carried out, and the labor intensity of workers is greatly reduced. At the same time, by allocating grinding ball mediums of different kinds and particle diameters, the particle size distribution of the particles in the slurry is improved, the processes of subsequent magnetic field formation, sintering and the like are facilitated, the yield is improved, the improvement of themagnetic properties of a material is facilitated, in addition, the grinding efficiency is greatly improved by the production method provided by the invention, and the electricity consumption can be reduced by about 30% in comparison.

Description

technical field [0001] The invention relates to a method for batch preparation of permanent magnet ferrite secondary molding slurry, and belongs to the technical field of batch preparation of magnetic materials. Background technique [0002] Magnetic materials are basic materials widely used in high-tech fields such as computers, electronic components, communications, automobiles, household appliances, industrial automation, aerospace, and national defense. As an important branch of magnetic materials, permanent magnet ferrite materials are the core functional component materials of permanent magnet motors. They are widely used in automotive motors, household appliance motors, industrial automation motors and small electric tool motors. The market application prospect is very broad. [0003] As we all know, the main technical indicators to measure the magnetic properties of permanent ferrite materials are residual magnetic induction (Br) and intrinsic coercive force (Hcj). ...

Claims

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Application Information

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IPC IPC(8): H01F41/02B02C21/00B02C17/10
CPCB02C17/10B02C21/007H01F41/0206H01F41/0246
Inventor 杨武国何震宇金正风包大新蒋有福
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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