Fluidization state of ultrafine powders.
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概要
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The fluidity of submicron powders was studied in a small-scale transparent column. Powders of Ni, Si3N4, SiC, Al2O3 and TiO2 were smoothly fluidized when gas velocity exceeded the apparent minimum fluidization velocity. The electrical conductivity of the particles did not affect the fluidizing quality in the range of the present experiments. All the tested submicron particles formed agglomerates during fluidization. The agglomerate size and the apparent minimum fluidization velocity were dependent on species of particles and fluidizing gas. The equilibrium size of agglomerates calculated from the apparent minimum fluidization velocity and the sedimentation velocity was in the range of 70-700 μm. However, the agglomerates of CaCO3 and ZrO2 were very cohesive and could not be evaluated. The primary particle size was not a proper measure for the classification of fine particles.
- 公益社団法人 化学工学会の論文
著者
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Kusakabe Katsuki
Department Of Applied Chemistry Graduate School Of Engineering Kyushu University
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Morooka Shigeharu
Department Of Applied Chemistry Kyushu University
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KATO YASUO
Department of Applied Chemistry, Kyushu University
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KOBATA ATSUO
Department of Applied Chemistry, Kyushu University
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KATO YASUO
Department of Applied Chemistry, Faculty of Engineering, Kyushu University
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