Navigation

7355 - STEAM COAL

  

 

7355

STEAM COAL

 

SHORT DESCRIPTION

STEAM TERMAL COAL

LONG DESCRIPTION

PRODUCT REF:

7355

DESCRIPTION:

STRAM THERMAL COAL

ORIGIN:

INDONESIA

DELIVERY:

BULK

INCOTERMS.

FOB

PAYMENT BY:

LETTER OF CREDIT

OTHERS:

Certified by SGS / Veritas / Intertek

Inspection of goods allowed at loading port

STATUS

CURRENTLY AVAILABLE

 

PRESENTATIONS

NOMINAL TOP SIZE: FROM 0 TO 50 mm.

PACKING

IN BULK

 

RAW EXTRACTED COAL

COAL STOCKPILES

BARGE COAL TRANSPORT

 

COMPOSITION:

STEAM COAL TYPICAL SPECS

TECHNICAL FACTS:

TYPE H STEAM COAL (GCV 6800 to 6500)

CalorificValueBasis6,200 kcal/kg NCV/AR

CalorificValueMin 6,000 kcal/kg NCV/AR

TotalMoisture(ARB)11.0% max

VolatileMatter (ARB)35  to  4 5 %

Ash (ARB)10 to 13.0%max

Sulphur (ARB)1.0%max

HGI40 - 50

 

TYPE G STEAM COAL (GCV 6500 to 6300)

CalorificValueBasis5,800 kcal/kg NCV/AR

CalorificValueMin 5,600 kcal/kg NCV/AR

TotalMoisture(ARB)16.0 % max

VolatileMatter (ARB)35   to   4 5 %

Ash (ARB)10 to 13.0%max

Sulphur (ARB)1.0%max

HGI40 - 50

 

(OTHER types available on demand)

When coal is used for electricity generation, it is usually pulverized and then combusted (burned) in a furnace with a boiler. The furnace heat converts boiler water to steam, which is then used to spin turbines which turn generators and create electricity. The thermodynamic efficiency of this process has been improved over time; some older coal-fired power stations have thermal efficiencies in the vicinity of 25% whereas the newest supercritical and "ultra-supercritical" steam cycle turbines, operating at temperatures over 600 °C and pressures over 27 MPa (over 3900 psi), can practically achieve thermal efficiencies in excess of 45% (LHV basis) using anthracite fuel, or around 43% (LHV basis) even when using lower-grade lignite fuel. Further thermal efficiency improvements are also achievable by improved pre-drying (especially relevant with high-moisture fuel such as lignite or biomass) and cooling technologies.