Ore and coal beneficiation method

Details Ore and coal beneficiation method Ore and coal beneficiation method

1986-09-02

1987-10-27

Bashore, S. Leon

Classifying, separating, and assorting solids

Fluid suspension

Liquid

252 61, 75 2, B03D 102

Patent

active

047028246

ABSTRACT:
This invention relates to a method of beneficiating coal or mineral ores containing a metaliferous sulfide, e.g. iron sulfide or pyrite, and comprises removal of unwanted components, including pyrite, from such ores by subjecting an aqueous pulp of the pulverized mineral or coal to a froth flotation process in which pyrites are depressed by a depressant composition comprising xanthan gum, a hydroxycarboxylic acid and sodium silicate. The process is especially useful for removal of pyrite from a solid carbonaceous fuel, e.g., coal containing pyrite, and for the recovery of non-ferrous metal concentrates from ores containing pyrite. The coal or ore may be subjected to a mild preoxidation treatment to enhance sulfide removal in the subsequent froth flotation operation.

REFERENCES:
patent: 4482480 (1984-11-01), Bresson et al.
patent: 4622131 (1986-11-01), Bresson et al.

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