Production of fine Sr-ferrite particles in a vertical stirred grinding mill under various grinding conditions

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  • KOTAKE Naoya
    Department of Chemistry and Chemical Engineering, Graduate School of Science and Engineering, Yamagata University
  • MOCHIZUKI Takahiro
    山形大学工学部物質工学科 山形大学工学部物質化学工学科
  • YOSHIDA Takayuki
    山形大学工学部物質工学科 山形大学工学部物質化学工学科
  • HASHIMOTO Taketoshi
    山形大学工学部物質工学科 山形大学工学部物質化学工学科
  • ANDO Nobuki
    山形大学工学部物質工学科 山形大学工学部物質化学工学科
  • KANDA Yoshiteru
    山形大学工学部

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Other Title
  • 粉砕方式を変えた攪拌ミル粉砕によるＳｒフェライト微粒子の生成
  • フンサイ ホウシキ オ カエタ カクハン ミル フンサイ ニ ヨル Sr フェライト ビリュウシ ノ セイセイ

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Description

Grinding studies using a vertical stirred mill were carried out in order to produce fine Srferrite particles. Laboratory tests were conducted in dry and wet conditions, and dry condition using methanol as a grinding aid. The operational variables in the stirred mill were the grinding ball size, the feed mass of sample, and the volume of water (wet condition). The size distribution of ground products was measured by the microscopic method, and could be expressed by a modified Gaudin-Schuhmann equation. The products were evaluated by the median particle size and the ratio of 10% and 90% cumulative weight passing sizes in the undersize distribution. The results of testing showed that the grinding ball size affected especially the fine grindability of the Sr-ferrite particles at each grinding condition. The product size of the Sr-ferrite particle in the stirred mill was finer than that in the ball mill; particles with a median particle size of 0.2-0.4μm were obtained in wet grinding.

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