Study on combustion reaction of pulverized coal injection in BF by thermogravimetric analysis

The combustion reaction characteristics of three kinds of typical pulverized coal under different temperature rising rate(5,10,20,50 ℃/min)in Shougang was studied by thermogravimetric analysis.By observation of thermogravimetric curves for all kinds of working conditions,it was found that the combustion characteristics of pulverized coal were affected by the temperature rising rate.As the temperature rising rate increased,the igniting temperature of pulverized coal was risen,the maximum mass loss rate was increased and the temperature corresponding to maximum mass loss rate was risen.The combustion rate of pulverized coal was calculated at 50 ℃/min temperature rising rate based on the principle of calculating combustion rate of pulverized coal for two-stage electrical heating method.The research result showed that the tendency of calculation result for combustion rate of pulverized coal at 700℃was almost the same as the tendency of calculation result for combustion rate of pulverized coal of two-stage electrical heating method.The combustion rate of different pulverized coal can be calculated by thermogravimetric analysis.