Electrostatic beneficiation of Hat Creek coal in the fluidized state

CIM Bulletin, Vol. 73, No. 822, 1980

I.I. INCULET, R.M. QUIGLEY, M.A. BERGOUGNOU and J.D. BROWN, Faculty of Engineering Science, The University of Western Ontario, London, Ontario, O.K. FAURSCHOU, Energy Research Laboratories, CANMET, Energy, Mines and Resources Canada, Ottawa, Ontario

Coal from Hat Creek, B.C., has been successfully beneflciated to remove ash while retaining calorific value by a dry electrostatic separation process using a fluidized bed for triboelec-trification. Two samples of Hat Creek coal used in the beneficiation experiments have been characterized particularly with respect to their mineral and clay content. The calorific value recovery exceeds the simple dry coal recovery because of the heat lost in altering the clay minerals of the ash fraction during burning. Recoveries and ash contents of the beneflciated coal are comparable to recoveries by water washing, but the dry process avoids the potential water pollution problems.
Keywords: Coal treatment, Electrostatic beneficiation, Hat Creek deposit, Triboelectrification, Fluidized beds, Separation towers.