1. Qianshun Technology Center, Beijing Shougang Co., Ltd., Beijing 100041, China; 2. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract：In order to improve the combustion of coal injection at Shougang Co., Ltd., the effects of different calcium-containing flux additions on combustion behavior of pulverized coal were systematically studied by co-combustion test and kinetic analysis of three common calcium-containing fluxes, slaked lime, calcium carbonate and lime, with pulverized coal injection in Shougang. The experimental results show that there is a synergistic effect in the combustion process after the pulverized coal is mixed with three kinds of calcium-containing fluxes, which can inhibit the combustion to a certain extent at initial stage of the reaction, but can promote combustion of pulverized coal at the later stage. According to the kinetic calculation results, the lowest reaction activation energy is 20.56 kJ/mol when the addition(mass fraction) of slaked lime is 1%, which has the best promotion effect on pulverized coal combustion. The lowest activation energy is 23.68 kJ/mol and 21.38 kJ/mol when the addition of calcium carbonate and lime is 3% and 5% respectively, which is most conducive to pulverized coal combustion. The results provide theoretical guidance for selecting the appropriate flux type and dosage during coal injection.
2023, Vol. 33 
