Rapid solid/liquid separation of ultrafine particles from diluted suspension using surface characteristics. (1st Report). Separation of Ultrafine Silica Particles by Slag Wool.

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  • HAYASHI Hiroshi
    Graduate School of Science and Engineering, Waseda University, Shinjuku–ku, Tokyo 169–8555
  • SASAKI Hiroshi
    School of Science and Engineering, Waseda University

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Other Title
  • 界面特性を利用した超微粒子希薄懸濁液の迅速固液分離　（第１報）　　スラグウールによる超微粒シリカの分離
  • スラグウールによる超微粒シリカの分離--界面特性を利用した超微粒子希薄懸濁液の迅速固液分離(1)
  • スラグウール ニ ヨル チョウビリュウ シリカ ノ ブンリ カイメン トクセイ オ リヨウ シタ チョウビリュウシ キハク ケンダクエキ ノ ジンソクコエキ ブンリ 1

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Abstract

Rapid solid/liquid separation from dilute colloidal dispersions is one of the most difficult techniques and effective method has yet to be established so far. But by using the electro-interfacial properties of colloidal particles, effective fine particle removal from dilute suspensions was made possible in a simple way. In this experiment, rapid separation of ultra fine silica particles (mean diameter of 200 nm) crystallized from geothermal water were investigated by using a column bed method packed with ferro-nickel fibrous slag wool, which was made as waste material from Fe-Ni electrosmelting process. Collection efficiency of silica particles was highly dependent on chemical characteristics of suspension, that is, pH and ionic strength：better separation was attained in more acidic condition and higher KNO3 electrolyte concentration. These experimental results were generally in agreement with the heterocoagulation theory. It could be concluded that surface interactions between particle and collector virtually determined the total removal capacity of collector bed.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 115 (1), 17-23, 1999

    The Mining and Materials Processing Institute of Japan

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