Re-flotation of black coal slurries from settling pit of Frantiek Mine, OKD, Inc.

The possibility of re-flotation of black-coal slurries from slurry ponds of Mine Frantiek, OKD, a.s was tested and is presented in the paper. Two types of collectors, namely Montanol and Flotacol NX, and bioflocculants such as been yeast were used and bioflocculants as is beer yeast to the quality of flotation concentrates was observed The results of work shows, that influence of bioflocculants in re-flotation of black-coal slurries is significant. The marked increase of flotation concentrate mass yields were signed in maintenance of required quality of black coal concentrates

Reflotation of Coal Slurries from OKD company, Mine Lazy

The goal of the work is a verification of selective flotation on the black coal slurries sampled from slurry ponds of Mine Lazy, OKD company. Reflotation was realized with 6 collectors: Flotakol NX, Flotalex Ekofol 440, Montanol, MP 125 and AF 2. The technology of main flotation was applied. The variance analysis was used for the selectivity evaluation of particular collectors, whereby both the yield and flotation concentrate quality were tested. The goal of the flotation experiments was to achieve the flotation concentrate quality under 10% of ash. From the results follows that by using basic flotation it is possible (with the slurry samples) to reach the marketable coal concentrates with the ash content under 10% by Flotalex collector application