COAL FLOTATION PROCESS; COMPRISES DISPERSING A SURFACTANT THROUGH A SLURRY OF COAL AND GANGUE, CONDITIONING THE SLURRY, DISPERSING OIL THROUGHOUT THE SLURRY, CONDITIONING AGAIN AND FLOATING COAL ON SURFACE

摘要

A process for the flotation of particles of lignitic coal, subbituminous coal or oxidized bituminous coal contained within a slurry of coal and gangue, comprising the steps of dispersing a surfactant throughout the slurry, first conditioning the slurry such that the surfaces of the particles of coal are selectively coated by the surfactant to produce activated particles of coal, dispersing an oil throughout the slurry, second conditioning the slurry such that the surfaces of the activated particles of coal are selectively coated by the oil to produce oiled particles of coal, and floating the oiled particles of coal on the surface of the slurry for separation from the slurry and gangue.