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为获取浮选气泡在矿浆中的运动规律及三相流中浮选气泡的最佳尺寸,运用欧拉模型模拟不同初始直径的气泡在不同密度矿浆中的运动过程.结果表明:在给定的初始条件下,同一浓度的矿浆中,单个浮选气泡所能捕获的矿物量以直径4mm的气泡最多,气泡尺寸增大或减小后,其矿物捕获量都有所减少.当矿浆中固相质量分数在20%~40%之间变化时,矿物捕获量最多的气泡尺寸变化不大,并且随着矿浆中固相质量分数的增大,单个气泡的捕获量增大,矿物粒子回收率增加.在实际生产中,直径为3.5~4 mm的中等大小气泡在运动过程中变形程度小,气泡水平偏移及浮升速度适中,对矿物粒子的捕获率及运载能力和浮升能力较强,有利于提高浮选产量和质量.
In order to obtain the law of movement of flotation bubbles in the slurry and the optimal size of the flotation bubbles in the three-phase flow, the Euler model was used to simulate the movement process of bubbles with different initial diameters in different density slurries.The results show that: Under the initial conditions, the amount of minerals captured by a single flotation bubble in the same concentration of flotation bubbles is 4 mm in diameter with the largest number of bubbles, and decreases after the bubble size increases or decreases. When the solid phase in the slurry When the mass fraction varied from 20% to 40%, the size of the bubbles with the largest amount of captured minerals changed little, and as the mass fraction of solid phase in the slurry increased, the entrapment of individual bubbles increased and the recovery of mineral particles increased In the actual production, medium size bubbles with a diameter of 3.5 ~ 4 mm have small deformation degree, moderate bubble level shift and moderate buoyancy velocity, strong capture rate, carrying capacity and floating capacity for mineral particles, Help to improve the flotation yield and quality.