浮选微观动力学和数学模型

FLOTATION MICROSCOPIC KINETICS AND MATHEMATICAL MODEL

根据湍流分散和湍流碰撞机理，初步研究了浮选槽内主要流体动力学参数对浮选微观子过程———气泡与矿粒碰撞速率和矿粒粘附、脱落几率———的影响，建立了浮选动力学数学模型．通过对模型参数的进一步研究，阐述了浮选微观动力学参数———碰撞速率系数和脱落系数———与浮选槽内主要流体动力学参数———气流数和搅拌雷诺数———间的相互关系，建立了数学模型，对优化浮选机技术参数具有一定的理论指导意义和实用价值．

Based upon the principle of distribution and collision in turbulent flow, the effect of the major hydrodynamic parameters on the microscopic sub processes of flotation are studied preliminarily. The flotation mathematical model is established. It is indicated by mathematical models that the collision velocity coefficient and detachment coefficient of bubble particle in a cell varies with air flow number and Reynolds number. The results of discussion are useful for flotation machine optimum design.