Recovery of coal particles from a tailing dam for ...
dinal slope 3 degree and feed rate 200 g/min. Humphrey spiral tests were carried out by Downer EDi—Mineral Technologies (LD7RC model) pilotscale. Feed rate and pulp density as two most important parameters were examined to find the optimum upgrading points (particle size 2 ? mm). Flotation experiments were performed in a Denver D12