Center for Advanced Separation Technologies CAST CAST Workshop on Coal Beneficiation and Utilization of Rejects Initiatives, Policies and Practices August 22-24, 2007 Fine Coal Beneficiation Fine Coal Beneficiation and Recovery and Recovery by Roe-Hoan Yoon, Director Center for Advanced Separation Technologies
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Fine Coal Beneficiation and Recovery - DOE Froth Flotation Disc Filter Increasing Difficulties. Center for Advanced Separation Technologies CAST Separation Processes Used for Coal
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Center for Advanced Separation Technologies CASTCAST
Workshop on Coal Beneficiation and Utilization of Rejects Initiatives, Policies and Practices
August 22-24, 2007
Fine Coal Beneficiation Fine Coal Beneficiation and Recoveryand Recovery
by
Roe-Hoan Yoon, DirectorCenter for Advanced Separation Technologies
Center for Advanced Separation Technologies CASTCAST
Separation Processes Used for CoalSeparation Processes Used for Coal
SieveBends
Dense Media
Cyclone
BasketCentrifuges
Dense Media Vessel
DewateringScreens
Raw CoalScreens
Coal Spirals Screen-BowlCentrifuges
ClassifyingCyclones
Med
ium
Solid-Solid Solid-LiquidSize-SizeC
oars
eFi
neU
ltraf
ine Froth Flotation Disc Filter
Incr
easi
ng D
iffic
ulti
esIn
crea
sing
Diff
icul
ties
Center for Advanced Separation Technologies CASTCAST
Separation Processes Used for CoalSeparation Processes Used for Coal
Ultr
afin
e
SieveBends
Dense Media
Cyclone
BasketCentrifuges
Dense Media Vessel
DewateringScreens
Raw CoalScreens
Coal Spirals Screen-BowlCentrifuges
ClassifyingCyclones
Med
ium
Solid-Solid Solid-LiquidSize-SizeC
oars
eFi
ne
Center for Advanced Separation Technologies CASTCAST
DeslimeDeslime Flotation CircuitFlotation Circuit
FEED
CLEAN COAL
REJECT
To OtherProcessing
Circuits
Reagents
Flotation Bank
HydrocycloneCentrifuge
ULTRAFINES100 mesh x 0
100 x 325 mesh
325 mesh x 0
effluent
Center for Advanced Separation Technologies CASTCAST
Fine Coal ImpoundmentFine Coal Impoundment
2.5 to 3 billion tons of fine coalIn 713 impoundmentsMostly in Central Appalachia.
Center for Advanced Separation Technologies CASTCAST
Effect of Particle Size on FlotationEffect of Particle Size on Flotation
(Gaudin, 1931)
10 100 10000.0
0.2
0.4
0.6
0.8
1.0
Model (t=3 min) (N=4) (N=12)
Data Bougainville Gaudin Mt.Isa Mt.Lyell
Rec
over
yd1 ( μm)
(Sherrell, Do and Yoon, 2005)
Model PredictionPlant Practice
Center for Advanced Separation Technologies CASTCAST
Particle Top Size (mm)
Cos
t of D
ewat
erin
g ($
/t)
0 1 2 3 4 5 6 70
2
4
6
8
10Ref: Hucko, 1990
VTVT
Cost of DewateringCost of Dewatering
Center for Advanced Separation Technologies CASTCAST