Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1989-02-27
1991-04-16
Lacey, David L.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, B03D 1002, B03D 1008, B03D 1018, B03D 102
Patent
active
050080067
ABSTRACT:
A method for separating ash and sulfur (including pyritic sulfur) contaminants from coal in a flotation process. The method comprises the steps of grinding the coal to small particlate size, forming a slurry of the ground coal and mixing the slurry with at least one compound selected from the group consisting of peroxy compounds, peroxides and superoxides 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
Lacey David L.
Lithgow Thomas M.
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