Method for concentrating the exinite group macerals from coal by

Details Method for concentrating the exinite group macerals from coal by Method for concentrating the exinite group macerals from coal by

1981-07-16

1983-03-22

Yudkoff, Norman

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209166, 209 9, 252 61, 210704, 210705, B03D 114

Patent

active

043774733

ABSTRACT:
A method for separating the exinite group macerals from the total coal by froth flotation in the presence of at least one short chain alcohol frothing agent and at least one methyl polyglycol type frothing agent in a first froth flotation zone to produce an exinite and other coal maceral-rich stream which is thereafter subjected to froth flotation in a second froth flotation zone in the presence of a short chain alcohol frothing agent to produce an exinite group maceral-rich stream and a stream rich in other coal macerals with the exinite-rich stream thereafter being mixed with an additional quantity of a short chain alcohol frothing agent and passed to a third froth flotation zone to produce an exinite group maceral group concentrate stream which is thereafter processed to produce a particulate exinite maceral group concentrate.

REFERENCES:
patent: 1773997 (1930-08-01), Green et al.
patent: 2319394 (1943-05-01), Erickson
patent: 2330479 (1943-09-01), Erickson
patent: 2506301 (1950-05-01), Klepetko et al.
patent: 2591830 (1952-04-01), Klepetko et al.
patent: 3696923 (1972-10-01), Miller
patent: 3710939 (1973-01-01), Hostynek et al.
patent: 4162966 (1979-07-01), Finch
patent: 4272364 (1981-06-01), Dixon et al.

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