A classification device capable of being integrated to flotation columns and its classification performance

Abstract

In order to discharge fine slime from the flotation tailings and make preparations for the possible individual recovery of coarse coal losses in flotation tailings, a classification device that can be integrated to flotation column was developed. It has no moving parts or extra occupations, and needs no electrical driving units as well. The experiments were carried out to study the influence of the operation parameters involving slurry volume Q, split ratio Rf of the underflow, and the design parameters of the device on its classification performance. The results show that: the cutting size d50 and comprehensive efficiency η both decrease with the increase of Rf while increase with the increase of Q; the sediment cone helps to increase the d50 and improve the η; bigger inner tank has a coarser d50; under proper conditions, the η can be as high as more than 75%; for a certain structure, the η increases almost linearly with the d50.