bituminous lignite
1.TheASTM rankings for bituminous coal, sub-bituminous coal, or lignite fit the spreader combustion process well.
2.Combustion characteristics of three different ranks of coals (lignite, bituminous coal, and anthracite), two biomass materials(wheat straw and maize cob), and coal-biomass mixture were studied by using the TG/DTG/DTA technique.
