Novel ball-milling method used for magnetic material industry

Abstract

The invention relates to a novel ball-milling method used for the magnetic material industry. According to the method, a milling medium and materials to be milled are added into ball-milling equipment, and the materials to be milled are milled to the designated particle size through the action of the milling medium. The materials to be milled are magnetic materials, and a ceramic milling body with the Mohs hardness being 7-9 and the density being 3.0-6.0 g / cm<3> is adopted as the milling medium. The defects of high energy consumption and high loss of milling media in the production process of the magnetic materials are overcome, the ceramic milling body is used as the milling medium in the production process, and parameters such as the hardness and the density of the ceramic milling body are optimized, so that compared with past high-chrome steel ball milling media, energy consumption and ball consumption can be reduced, materials with narrower particle size distribution can be obtained, and the milling efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of ball milling, in particular to a novel ball milling method used in the magnetic material industry. Background technique [0002] At present, the equipment used in the magnetic material ball milling process is a bedroom ball mill. The grinding medium is high-chromium steel balls. The specifications of the selected high-chromium steel balls are 6mm-8mm. The ball mill speed is 25rpm, and the magnetic material is ground from 6μm to 0.8μm. 2.5T / (16-18h), that is, about 150Kg / h, due to the high density of high chromium steel balls, generally 7.8g / cm 3 About, the ball mill needs to consume a lot of energy in the production process, about 480 kWh / ton of powder, and because the hardness of the steel ball is low, the loss of the ball during the grinding process is relatively large, which is 15Kg / ton of powder, and when the steel ball is from When 6-8mm is ground to about 4mm, the surface of the steel ball will be uneven due...

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Problems solved by technology

[0002] At present, the equipment used in the magnetic material ball milling process is a bedroom ball mill. The grinding medium is high-chromium steel balls. The specifications of the selected high-chromium steel balls are 6mm-8mm. The ball mill speed is 25rpm, and the magnetic material is ground from 6μm to 0.8μm. 2.5T / (16-18h), that is, about 150Kg / h, due to the high density of high chromium steel balls, generally 7.8g / cm 3 About, the ball mill needs to consume a lot of energy in the production process, about 480 kWh / ton of powder, and because the hardness of the steel ball is low, the loss of the ball during the grinding process is relatively large, which is 15Kg / ton of powder, and when the steel ball is from When 6-8mm is ground to about 4mm, the surface of the steel ball will be uneven due to wear and impact, which will seriously affect the particle size (or fineness) of the final material, thereby affecting the grinding efficiency

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