Selective flotation of inorganic sulfides from coal

Details Selective flotation of inorganic sulfides from coal Selective flotation of inorganic sulfides from coal

1988-05-31

1989-09-19

Lacey, David L.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

44622, B03D 102

Patent

active

048678686

ABSTRACT:
Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material is blended with humic acid, a pyrite flotation collector and a frothing agent within a flotation cell to selectively float pyritic sulfur leaving clean coal as an underflow.

REFERENCES:
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patent: 4522652 (1985-11-01), Attia
patent: 4615712 (1986-10-01), Wen
patent: 4632750 (1986-12-01), McGarry
Kirk Othmer Encyclopedia of Chem. Tech.-vol. 7, 530-539, published John Wy & Sons, 1967.
Firth and Nicol, "The Influence of Humic Material on the Flotation of Coal", Int. Jour. of Min. Proc., 8 (1981), 239-248.
Laskowski et al, "Effects of Humic Acids on Coal Flotation", Coal Preparation 1986, vol. 3, pp. 133-154.
U.S. Dept. of Energy, @ Pgh, PA, "Quarterly Technical Progress Report"; period ending Sep. 30, 1986, pp. 88-89.

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