Process for electrostatic separation of pyrite from crude coal

Details Process for electrostatic separation of pyrite from crude coal Process for electrostatic separation of pyrite from crude coal

1974-08-15

1976-03-02

Halper, Robert

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

209127R, B03B 104

Patent

active

039416852

ABSTRACT:
An improved process is disclosed for electrostatic separation of pyrite from powdered crude coal comprising vigorously mixing the powdered crude coal with a selected fatty acid glyceride as a conditioning substance and conducting the electrostatic separation at a relative humidity of 2.5-20% and a temperature between room temperature and 100.degree. C. In a multiple stage process yields of purified coal substantially greater than those of prior art processes can be obtained.

REFERENCES:
patent: 1153182 (1915-09-01), Schniewind
patent: 2154682 (1939-04-01), Johnson
patent: 3052349 (1962-09-01), Snow
patent: 3073447 (1963-01-01), Autenrieth
patent: 3217876 (1965-11-01), Autenrieth
patent: 3225924 (1965-12-01), Autenrieth
patent: 3835996 (1974-09-01), Singewald et al.

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