Aim at this problem, analyzed the factor caused pulverized coal complete combustionafter adding BFG. And gained a conclusion: time that pulverized coal keeps in furnaceshorten and temperature level decline is the important reason above all.

• 针对这一问题,本文首先分析了高炉煤气掺烧对煤粉燃尽影响的各种因素,并得出高炉煤气掺烧使得锅炉炉膛温度下降明显、燃烧烟气生成量大大增加、煤粉在炉内停留时间变短是掺烧引起锅炉飞灰可燃物含量上升的主要因素。