Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1987-06-05
1989-05-09
Schor, Kenneth M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, 44625, 44627, 241 20, B03D 102
Patent
active
048286869
ABSTRACT:
A method for enhancing hydrophobicity of high volatile bituminous coal and coals of a lower grade and for separating ash and sulfur (including pyritic sulfur) contaminants from coal in a floatation process. The method comprises the steps of grinding the coal to small particulate size, forming a slurry of the ground coal and mixing the slurry with at least one compound selected from the group comprising inorganic peroxy compounds, the preferred compound being oxone which is a mixture of potassium monopersulfate, potassium hydrogen sulfate and potassium sulfate. This slurry is allowed to react to condition the particulate coal and develop increased hydrophobicity for the coal while depressing the sulfur contaminants and ash during froth flotation.
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Miller Jan D.
Ye Yi
Lithgow Thomas M.
Schor Kenneth M.
University of Utah
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