dr kalyan sen
DESCRIPTION
Emerging Dimension for Utilization of Global Coal. Dr Kalyan Sen. Import of Coal. ‘ why difficult - to - wash ’. due to. typical geological formation intergrown mineral matter high NGM at desired d 50. Fractional Yield/Ash vs. Rel. Density. 30. 80. 25. 60. Characteristic ash, %. - PowerPoint PPT PresentationTRANSCRIPT
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Dr Kalyan Sen
Emerging Dimension
forUtilization of Global Coal
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Import of Coal
0
5
10
15
20
25
1990-91
1991-92
1992-93
1993-94
1994-95
1995-96
1996-97
1997-98
1998-99
1999-00
2000-01
2001-02
2002-03
2003-04
Coking Coal
Non-Coking Coal
Total Import
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‘why difficult - to - wash’
due to
typical geological formation intergrown mineral matter high NGM at desired d50
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Lower seam coal
Upper seam coal Upper Seam Coal
Lower Seam Coal
Upper Seam Coal
Mass Ditribution of Upper and Lower seams Coals
Raw coals crushed to 75mm
1.2 1.4 1.6 1.8 2
Relative Density
0
10
20
30
40
50
60
Fractional Mass %
A X
Upper Seam Coal
Lower Seam Coal
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1.3 1.45 1.55 1.65 1.75 1.85 1.95 2.150
5
10
15
20
25
30
0
20
40
60
80Y
ield
,%
Mid Rel. Den
Characteristic ash, %
Fractional Yield/Ash vs. Rel. Density
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Relationship between fract. Ash% & mid. sp. gr. is one of the inherent properties of coal
universal in nature
linear, in sp. gr. range of coaly matter
co-eff. of linearity indicates the maturity
hence, the name
Characteristic Ash ()
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Characteristic ashas
optimum quality parameter
for coking coal =26-28%
limiting value for
non-coking coal =50-55%
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This is why, for metallurgical use,
Western coals(av. ash% 12-16) are washed
down to 8-12%,in comparison to Indian coals that need to be washed down
to 17-19% ash
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Similarly, for thermal power plant use,
Western coalsare washed down to 12-16%,
in comparison to Indian coals that need to be washed down
to 30-34% ashor below
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Range of cut density (d50) for Steel and Power Sectors
0
20
40
60
1.25 1.45 1.65 1.85
Relative Density
Frac
. Ash
% 26+ 2% Steel
52.5+ 2.5% Power
Less Matured Coal
More Matured Coal
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START
mc = mo ?
Obs. mass - mo
Obs. density - do
Density dist. RelationMaterial balance
Density at cut-points
S/A, F/S, , p ….
Cal. mass - mc
Cal. density - dc
STOP
Control Roominformation
Change density
YesNo
OperationFlow Chart
Maximum compositeYield at desired
quality
optimizationstrategy
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State-of-the-ArtIntegrated Coal Washing
Pilot Plant
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Raw Coal Section
Dry Deshaler
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Raw Coal Section
Single Roll Crusher
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Raw Coal Section
Double Roll Crusher
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Coarse Coal Plant
Jig
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Coarse Coal Plant
HM Drum
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Fine Coal Section
Targetted
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Fine Coal Treatment Pilot Plant
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PLC based Control Room
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STN - 1 STN - 2
PRINTER
HUB
P L C ( GE-Fanuc)
STATION (OPERATORS TESRMINAL)
HONEYWELL SERVER
(OPRT + PROGRAMMING TERMINAL)
CONVERTOR
SE
RIA
L I
NT
ER
FA
CE
SINGLE &
MULTILOOP
CONTROLLER
TO EXISTING PLANT LOCAL I / O SUB - SYSTEM
CENTRAL CONTROL ROOM
GE
NIU
S
LA
N
CONTROL
SYSTEM
Total support I/O nos. - 4096
SINGLE &
MULTILOOP
CONTROLLER
J B
J B
BinWeigher
WeightFeeder
I/P Converter
Trans-mitters
ControlValves
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Spiral
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Thanks