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The combustion characteristics of pulverized coal when using blast furnace slag charged with iron ore
containing rare earth elements as a composite catalyst were investigated by thermo gravimetric analysis. The results show
that the combustion char acteristics of pulverized coal loaded with 21.3% by weight of blast furnace slag containing 15%
rare earth ore are better than those of others. It is also indicated that the composite catalyst promotes combustion of
volatiles and also performs well for carbon residue. The mechanism of promotion by the composite catalyst was explored.
The kinetic parameters calculated by the Coats-Redfern model show that the activation energy(E) was reduced by10
kJ/mol, the time of combustion was shortened by 3min, pre-exponential factor(A) reached 2.7×104/min and general
combustion characteristic index (S )was 1.09.