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Types of coal

QUALITY CHARACTERISTICS for Anthracite

For coals of grade A is typical volatile content less than 8%. Basic mass of the anthracite is used for energy purposes. Medium and large classes of them serve as a smokeless fuel in the domestic sector.

We recommend that you use anthracite in cast iron boilers by forced draft.

Quality characteristics for long-flame coal, grade D

For coals grade D characteristic is volatile content of more than 30% (30% -40% and above) with powder or weakly-caking non-volatile residue. D grade coals are very widespread. Moisture in presented coals is equal to average 15%. This is due to the parent moisture presence in the piece of coal. That said, gained moisture is equal to average 8%. Long-flame coals in some cases are good raw material for semi coking. Coals of this grade are used primarily as an power and domestic fuel, so their most important characteristic is the heat of combustion. When used in a boiler room, it is necessary to consider the technical requirements for the raw materials of the boiler for volatile content (average 41%) because some boilers cannot use raw material with volatile more than 30%.

Quality Ccharacteristics for low-caking coal, grade SS

Grade SS coals are characterized by volatile content of 20% to 32%. Common uniting feature for them is low-coking or complete lack of it. Moisture of freshly mined coal grade SS reaches 8-9%. Ash content ranges from 8 to 25%. The sulfur content is typically less than 0.8%. The carbon content ranges from 74 to 90%. Coal grade SS is mainly used by large power plants and in domestic household.

We recommend that you use low-caking coal in iron and cast iron boilers or in stone bread oven by natural and poor draught.

Quality Charasteristics for meager coal, grade T

Grade T combines coals with volatile content from 8% to 18%. Common uniting feature for them is the lack of caking capacity. Moisture of freshly mined coal grade T reaches 7-9%. Ash content ranges from 8 to 25%. The sulfur content in Kuzbass coal comes to 1,7% on the average 0,7%. The carbon content ranges from 88 to 92%. Coals of grade T are mainly used by large power plants. Due to the low levels of volatile matter and high calorific value, these coals in a mixture with coal grade D raise the heating value and knock down volatile.