Product and Services

>>COKING COAL
>>SEMI COKING COAL
>>NLW COKING COAL
>>NON COKING COAL
>>HARD COAL
>>WASHED AND BENEFICIATED COAL
>>MIDDLINGS
>>REJECTS
>>CIL - COKE / LTC COKE:-
>>COAL FINES / COKE FINES
>>TAR / HEAVY OIL / LIGHT OIL / SOFT PITCH
>>GRADATION OF COAL
>>SUITABILITY  OF COAL

• COKING COAL

These are such coal which when heated in absence of air from coherent bead, free from volatiles, with strong and porus mass, called coke.

• These have coking properties

• Mainly used in Steel making and metallurgical industries

• Also used for hard coke manufacturing

• SEMI COKING COAL

These are such coal which when heated in absence of air form coherent bead not strong enough to be directly fed into blast furnace. Such coal are blended with coking coal in adequate proportion for coke making.

• These have comparatively less coking properties than coking coal.

• Mainly used as blendable coal in steel making, merchant coke manufacturing and other metallurgical industries.

NLW COKING COAL :-

These Are such Coal ,which are not used in metallurgical industries. Because of higher ash content, these are not acceptable to Washery  for washing. These Coal are used power utilities and non core sector consumers.

• NON COKING COAL

Such coals which do not have caking properties, are Non-Coking Coal.

• Mainly used as thermal grade coal for power generation.

• Also used for Cement, Fertilizer, Glass, Ceramic, Paper, Chemical, Bricks manufacturing and for other heating purpose.

• HARD COAL

Hard coke are formed from coking / semi-coking coal through the process of carbonization.

• Mainly used in metallurgical industries.

• Also used in industrial plants utilizing furnaces.

• WASHED AND BENEFICIATED COAL

Washed and beneficiated coal are such coal which have undergone process of coal washing or coal benefication causing value addition of coal by way of reduction in ash %age.

• Beneficiated coking coals find use in manufacturing of hard coke for steel making.

• Beneficiated washed Non-coking coal find use mainly for power generation.

• Beneficiated Non-coking coal can be used by Cement plants, Sponge Iron plants and other industrial plants.

• MIDDLINGS

Middlings are by-product of three stage / coal washing / beneficiation process, as a fraction of feed raw coal.

• Middling can be used for power generation.

• It can also be used by domestic fuel plants, brick manufacturing  units, Cement plants, Industrial plants etc.

• REJECTS

Rejects are the product of coal washing process after separation of cleans and / or middlings, as a fraction of feed raw coal.

• Rejects find use for Fluidized Bed Combustion ( FBC ) Boilers for power generation, road repairs, briquette (domestic fuel) making, land filling purpose etc.

• CIL - COKE / LTC COKE

CIL - Coke / LTC Coke is smokeless environment friendly product of Dankuni Coal Complex, obtained through low temperature carbonisation.

• It finds use in furnace, Kilns of industrial units.

• It can also be used as domestic fuel by Halwais, Hotels etc.

• COAL FINES / COKE FINES

These are the screened fraction of feed raw coal and screened fraction of LTC coke / CIL-Coke respectively, obtained from Dankuni Coal Complex. and other coke oven plants

• These are used in furnaces in industries as well as for domestic purposes.

• TAR / HEAVY OIL / LIGHT OIL / SOFT PITCH

These are products from Dankuni Coal Complex using low temperature carbonisation of Non-coking coal in vertical retorts.

• These find various industrial uses in furnaces of plants, boilers of industrial plants as well as power houses, oil industries, dye industries, pharmaceutical industries etc.

 Gradation of Coal

D. ASSAM COAL
GRADE	UHV RANGE (KCALS/KG)
A	6200 - 6299
B	5600 - 6199
E. HARD COKE
GRADE	ASH %
BY PRODUCT PREMIUM	NOT EXCEEDING 25 %
BY PRODUCT ORDINARY	EXCEEDING 25 % BUT NOT EXCEEDING 30 %
BEEHIVE PREMIUM	NOT EXCEEDING 27 %
BEEHIVE SUPERIOR	EXCEEDING 27 % BUT NOT EXCEEDING 31 %
BEEHIVE ORDINARY	EXCEEDING 31 % BUT NOT EXCEEDING 36 %

 Suitability of Coal