It is evident that the Reflux Flotation Cell achieves remarkably
strong desliming with the data consistently at the limit of the Tree
Flotation Curve. This performance is achieved in a single flotation
stage. In principle, the Tree Flotation Curve represents the limit
of flotation performance. This suggests the technology could be
effective in producing ultra-low ash coal, using a ball mill to grind
and liberate the valuable particles, releasing the mineral matter,
and then finally rejecting the mineral matter through the strong
counter current washing.