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对一种外部接触的装置进行了试验研究,以评价它在细粒回收中的效果。为了个目的,在1台浮选柱上安装了1个外部过流式充气器(接触器)。该装置安装于矿浆循环回路中,它由1根多孔不锈钢管组成,在它周围焊了1个刚性密封套。该装置起着气泡发生器和气泡-颗粒反应室的作用。变化因素包括接触器长度、气孔尺寸、捕收管长度、装置的位移、浮选柱的长度和被测试的表面矿浆流速(多孔管内部)。各粒级回收曲线用1台Brinkmann粒度分析仪进行测定。结果表明,矿浆流速在细粒回收中起着极其重要的作用。其他像捕收管长度,多孔管长度和气孔尺寸等参数对细颗粒的回收在一定范围内都起一定的作用。由此得出结论,常规的气泡内部运行与外部接触相结合才是回收宽级别颗粒的理想方法。
An external contact device was tested to evaluate its effectiveness in fines recovery. For this purpose, an external over-flow inflator (contactor) was installed on a flotation column. Installed in the slurry circulation loop, the unit consisted of a porous stainless steel tube with a rigid gland welded around it. The device functions as a bubble generator and a bubble-particle reaction chamber. Variables include contactor length, pore size, trap length, device displacement, flotation column length, and surface slurry flow rate under test (porous tube interior). Each particle size recovery curve was measured with a Brinkmann particle size analyzer. The results show that the slurry flow rate plays an extremely important role in the recovery of fine particles. Other parameters such as trapping tube length, length of porous tube and pore size can play a role in the recovery of fine particles within a certain range. It follows that the conventional bubble internal operation in combination with external contact is the ideal method for recovering wide-range particles.