Grain size - Bunryu

Japanese: 分粒 - ぶんりゅう

An operation to separate powder or granular materials by particle size using methods such as sieving or classification. By size separation, raw materials are separated into coarse and fine products. The particle size of the particles that are equally separated into the two products is called the separation size. Except for special cases, sieving is an operation suitable for separation sizes of several tens of micrometers or more, while classification is an operation suitable for separation sizes of several hundred and several tens of micrometers or less. [Inoue Toshio]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ふるい分けあるいは分級のような方法によって粉粒体を粒子径の大小により分離する操作。分粒により，原料は粗粒産物と細粒産物とに分けられる。両産物に等分に分離された粒子の粒子径を分離粒度separation sizeという。特殊な場合を除き，ふるい分けは分離粒度数十μm以上，分級は分離粒度百数十μm以下の分粒に適した操作である。【井上外志雄】

出典　株式会社平凡社世界大百科事典第２版について　情報

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