Size Distribution of Air Bubbles in the Pneumatic-mechanical Flotation Machine
The constant of flotation velocity is the value characterizing the kinetics of cyclic flotation. In the statistical theory of flotation its value is the function of probabilities of collision, adhesion and tearing off the grain from the air bubble. The grain air bubble collision plays a key role since there must be a prior collision before the grain air bubble adhesion happens. The probability of such an event to occur is proportionai to the relation of the grain diameter to the bubble diameter. When the grain sizes are given, it is possible to control the value of collision probability by means of the size of air bubbles. Consequently, it is significant to find the effect of physical and physicochemical factors upon the diameter of air bubbles in the form of a mathematical dependence.In the pneumo-mechanical flotation machine the air bubbles are generated by the blades of the rotor. The dispergation rate is affected by, among others, the rotor rotational speed, the amount of air transported to the flotation chamber an time and the liquid surface tension, depending on the type and number of applied flotation reagents.In the proposed paper the authors will present the distribution of air bubble diameters on the grounds of the above factors, according to the laws of thermodynamics. The correctness of the derived dependences will be verified empirically.
Flotation kinetics Statistical theory The Distribution of air bubble sizes Pneumo-mechanical flotation machine
M. Brozek A. Mlynarczykowska
Department of Mineral Processing and Environmental Protection, Faculty of Mining and Gceigineering,AGH University of Science and Technology, Kraków, Poland
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2488-2494
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）