细粒浮选体系中粗粒效应理论与应用

来源期刊：中南大学学报(自然科学版)1993年第6期

论文作者：邱冠周 胡岳华 王淀佐

文章页码：743 - 748

关键词：浮选; 颗粒; 相互作用; 粗粒效应

Key words：flotation; particles; interactions; coarse particle effects

摘    要：本文研究了紊流条件下粗粒与细粒颗粒群间的相互作用,提出“粗粒效应”理论,包括三种作用机理:粗粒的载体作用,以漩涡微尺度λ₀为理论判据;粗粒的助凝作用,以颗粒雷诺数Re_p为理论判据;粗粒的中介作用,以裂解频率f_B为理论判据。λ₀值对应于最佳载体粒度,Re_p大,助凝作用大,f_B大,裂解作用大。

Abstract: The interactions between coarse and fine particles in turbulent flow have been studied inthis paper. The theory of coarse particle effects has been proposed which includes threemechanisms, i. e. the carrier effect of coarse particle with eddy microseale λ₀ as a criterion;promoting-aggregation of coarse particle with grain Reynolds number Re_p as a criterion;medium-breakage with breakage frequency f_B as a criterion. The λ₀ value is corresponding tobest carrier size; promoting-aggregation and medium-breakage are increased, respectivly, withthe increase of values of Re_p and f_B. Key words:flotation; particles; interactions; coarse particle effects