Deashing corning manner null of high ash

摘要

PURPOSE:To make it possible to extremely reduce the amount of a granulating binder and to carry out efficient ash removal treatment, by granulating coarsely ground coal and finely ground coal of raw coal having high ash content with tar and warm water at a specific slurry concentration. CONSTITUTION:5-10wt% raw coal having high ash content is coarsely ground into 0.5-1.0mm and the rest is finely ground into =0.3mm. The finely ground coal is treated with tar and warm water at 50-70 deg.C into 10-30wt% slurry and the slurry is blended with 7wt% of the coarsely ground coal to carry out ash removal and granulation. A surface active agent is preferably added in the ash removal and granulation.