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Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution

Patent ·
OSTI ID:6920700
; ;
A single dose of additive contributes to three consecutive fine coal unit operations, i.e., flotation, dewatering and reconstitution, whereby the fine coal is first combined with water in a predetermined proportion so as to formulate a slurry. The slurry is then mixed with a heavy hydrocarbon-based emulsion in a second predetermined proportion and at a first predetermined mixing speed and for a predetermined period of time. The conditioned slurry is then cleaned by a froth flotation method to form a clean coal froth and then the froth is dewatered by vacuum filtration or a centrifugation process to form reconstituted products that are dried to dust-less clumps prior to combustion. 3 figures.
Assignee:
Dept. of Energy, Washington, DC (United States)
Patent Number(s):
US 5379902; A
Application Number:
PPN: US 8-149270
OSTI ID:
6920700
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
ADDITIVES
AGGLOMERATION
BRIQUETS
CARBONACEOUS MATERIALS
COAL
COAL FINES
COAL PREPARATION
ENERGY SOURCES
FABRICATION
FLOTATION
FOSSIL FUELS
FUELS
MATERIALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SOLID FUELS
WATER REMOVAL