ガス底吹きを伴う厚いスラグ層内におけるメタル滴のホールドアップ

抄録

Model experiments were carried out to investigate the bubble and liquid flow characteristics in a bottom blowing bath covered with a thick slag layer typical of in-bath smelting reduction processes. An aqueous ZnCl₂ solution and silicone oil were used as the models for molten metal and molten slag, respectively. The density ratio of the solution to the silicone oil was 1.7, being close to a steel/slag density ratio of 2.0 to 2.2 in practice. The diameter of a vessel containing the two liquids was changed over a wide range. The holdup of the solution carried up by bubbles into the upper silicone oil layer was measured with a suction tube. The volume of the solution, V_m, was dependent mainly on the density difference. Empirical correlations of V_m and the penetration height of the solution were derived.