イオンおよび極微粒子の浮選
1982 年 98 巻 1134 号 p. 671-678
詳細
1982 年 98 巻 1134 号 p. 671-678
In this review the flotation of ions and ultrafine particles has been presented inrelation to the recent experimental and theoretical work abailable.
In the ten years since the experimental work of ion flotation has not been studied. Therefore, the present understanding of the subject is the results obtained in the years 1960-1970. As regards practical application, cadmium and copper ions in waste water had been treated in Japan, but its feasibility has yet to be established.
The physical factors that influence the floatability of fine particle flotation are reviewed. Particular emphasis is placed on the hydrodynamic interactions between particles and bubbles and the dependence of the collection efficiency on the particle and bubble sizes. Dynamic double layer theory studied by Derjaguin and Dukhin has been shown to explain the attachment of fine particles to the bubbles during flotation. Entrainment is shown to be an important contributory mechanism to the flotation recovery of fine particles. The concept of coagulation flotation has been introduced to explain the behavior of effective flotation of ultrafine particles without using of collectors.
