Fahrenwald浮選機のインペラーにおける気泡の流れ模様 (第3報)
1958 年 74 巻 836 号 p. 87-92
詳細
1958 年 74 巻 836 号 p. 87-92
The defect of this type of flotator is that of correlationship of aeration with the pump action of impellers and that of poor efficiency accordingly derived.
With the object of comparative study, the author selected the “JETAIR” type of impeller which is made ot jet from the outer circular edge, and examining the moving status of bubbles and measuring the pump efficiency and checking up the frother effects he came to the following conclusion:-
1) Part of jet-bubbles is observed rolled into the impeller according to back eddy. Consequently for the increase of the pump efficiency and for independence of the aeration action, preventive measures of this back eddy is necessary.
2) The uprising bubbles are readily broken up into minuter particles at rather slow rotating speeds, and that with less pattering.
3) The frother effects are to be rapidly increased with the increase of the rotating speed, but above the limit speed the increase of effects is seen decreasing.
4) By means of a bubble vane, the dispersion of bubbles can be uniformalized deriving the increase of the frother effects.
