焼結機給鉱部での原料粒度偏析の検討

概要

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A sinter mix fed into a pallet produces particle size segregation and hence, coke segregation through the thickness of the piled-up layer, which affects heating rate, gas permeability and productivity. By using chutes of various types, the authors have investigated segregation phenomena in the sinter bed formed at feeding stage. Experimental results are summarized as follows : A positive segregation of finer particles at the upper portion of the sinter bed is caused by ; (1) the increase of the horizontal velocity V_x of the falling meterial, (2) the decrease of the vertical velocity V_y of the falling material, (3) the promotion of the positive segregation of finer particles at the bottom region of the falling stream on the chute, and (4) the suppression of the turbulence in the falling stream from the chute to the pallet. The above mentioned items (1)-(4) are attained by choosing a proper chute. Furthermore, the difference of the segregation caused by various chutes are interpreted in terms of the ratio V_x/V_y.
社団法人日本鉄鋼協会の論文
1985-12-01