Study on thermogravimetric test in the atmosphere of air shows that the burning time of anthractic coal is longer than that of bituminous coal no matter under what kind of the heating rate.The ignition temperature of anthracitic coal is about 200 ℃ higher than that of bituminous coal

the burnout temperature of anthracitic coal is about 70 ℃ higher than that of bituminous coal.The activation energy test results obtained from model of reaction kinetics show that the activation energy of anthracitic coal is about 30 kJ/mol higher than that of bituminous coal.Increasing heat transfer and extending residence time in the furnace is helpful to shorten preheating time and combustion time of the fuel coal particles

thereby promoting the anthracitic coal to burnout.