Combustion behavior of anthracite substituting for coke and#br#
its effects on NOx emission in sintering process
QUE Zhigang1,2,WU Shengli2,WANG Jinsheng3,AI Xianbin1
(1. Institute of Energy Conversion, Jiangxi Academy of Science, Nanchang 330096, Jiangxi, China;2. School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Ironmaking Plant， Fangda Special Steel of Science and Technology Co., Nanchang 330012, Jiangxi， China)
Abstract：In order to clarify the effect of the combustion behavior of solid fuels on the NOx emission and sintering indexes during the iron ore sintering. When the lownitrogen anthracite substituted coke breeze with different proportions, the influence of the combustion rate and the CO formation of solid fuels on the NOx concentration, the emission total and the conversion rate of N elements during the combustion process were investigated by the microcombustion equipment. Then, industrial experiments were conducted to study the influences of different substitution ratios of lownitrogen anthracite for coke breeze on the NOx emission and sintering indexes. The results indicated that the combustion rate of solid fuels decreased with the increase of the proportion of anthracite substituting of coke breeze, and it had a positive linear correlation with the NOx concentration. While the CO formation firstly increased and then decreased, which had a negative linear correlation with the emission total of NO and the conversion rate of N element, respectively. Moreover, the sinter indexes were affected by the low calorific value of solid fuels. Hence, considering the NOx emission and sintering indexes, the appropriate substituting proportion of lownitrogen anthracite for coke breeze was 70%.
阙志刚，吴胜利，王金生，艾仙斌. 无烟煤代替焦粉燃烧行为及对烧结NOx排放的影响[J]. 钢铁, 2019, 54(10): 23-29.
QUE Zhigang1,2,WU Shengli2,WANG Jinsheng3,AI Xianbin1. Combustion behavior of anthracite substituting for coke and#br#
its effects on NOx emission in sintering process. Iron and Steel, 2019, 54(10): 23-29.
