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Dry Process for Removal of Pyrite from Coal.

Authors
Abel-WT; Eckerd-JW
Source
U S Pat 3 540 662 1970 Nov; :
Link
NIOSHTIC No.
10011800
Abstract
Pyritic sulfur was removed from pulverized coal by successive separations by particle size and particle mass, respectively. Thus, ground coal was air swept into a felvation (separation of airborne particles passed up through sizing screens) column and the oversize recycled. The undersize fraction (-400 mesh) was mixed with the light fraction. The intermediate fractions were separated by air classifiers (based on mass). Pyrite-depleted light product fractions were mixed with the undersize fraction and used in the conventional way.
Publication Date
19701101
Document Type
PA;
Fiscal Year
1971
NTIS Accession No.
NTIS Price
Identifying No.
PAT 3,540,662
NIOSH Division
MERC;
Source Name
U.S. Pat. 3,540,662; Nov. 17, 1970; Chem. Abstr. 74:56,017F
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