Process for cleaning fine coal

Patent · Tue Aug 04 00:00:00 EDT 1981

OSTI ID:6162586

Ennis, R E

A process for the wet concentration and cleaning of fine coal is provided which comprises the steps of desliming and thickening a dilute slurry of fine coal and contaminant particles having a size of less than about 10 mm by introducing the same to a hydrocyclone separator to retain a slurry of particles having a size greater than about 0.1 mm, wet concentrating the last-named slurry and removing the heavier contaminant particles by introducing it to an autogenous dense medium separation vessel having a manifold for injecting water at an intermediate level and controlling the underflow of heavier than coal particles to maintain a fluidized bed of heavier particles and causing a slurry of the lighter coal particles to overflow, and concentrating and dewatering the overflow by means of a static or vibratory sizing screen.

• Assignee: Linatex Corp. of America
• Patent Number(s): US 4282088
• OSTI ID: 6162586
• Resource Relation: Patent File Date: Filed date 3 Mar 1980
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL FINES
CLEANING
FLUID INJECTION
FLUIDIZED BED
FUEL SLURRIES
PARTICLE SIZE
SCREENS
SEPARATION PROCESSES
WATER
WATER REMOVAL
DISPERSIONS
FUELS
HYDROGEN COMPOUNDS
MIXTURES
OXYGEN COMPOUNDS
REMOVAL
SIZE
SLURRIES
SUSPENSIONS
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage