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

Patent · Tue Jan 10 00:00:00 EST 1995

OSTI ID:6920700

Wen, W W; Gray, M L; Champagne, K J

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
• Resource Relation: Patent File Date: 9 Nov 1993
• Country of Publication: United States
• Language: English

Related Subjects

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