Influence of steel industrial wastes on burnout rate and NOx release during the pulverized coal catalytic combustion

In this work, 3 kinds of coal, 5 kinds of wastes from steel industry were chosen, orthogonal combustion experiments were carried out in a lab-scale drop tube furnace. Burnout rate and NOx release were selected as evaluation indexes to evaluate the catalytic combustion and denitration effect. The catalytic combustion performance was discussed in term of the X-ray diffraction (XRD) and Scanning electron microscopy (SEM) of combustion residues. The results showed that NOx content and burnout rate of different coal varied greatly; some additives could change the apparent form of combustion residues, which indicated that the additives played good roles in combustion process. This paper will not only achieve purpose of improving coal burning efficiency and energy saving, but also turning wastes into valuables and protect the environments.