Influence of biomass on multi-component reaction model and combustion products of coal gangue

Abstract

The effects of biomass on coal gangue combustion characteristics, combustion products and combustion reaction model are studied in this paper. Based on the thermogravimetric experimental data, a multi-component combustion reaction model for coal gangue and biomass was established. The CG combustion reaction mechanism can be well explained by the two-component combustion reaction model. The participation degree of organic matter and inorganic matter is 90% and 10%, respectively. C3P1, C1P1 and C1P3 can be better explained by the five-component combustion reaction model. The reaction model corresponding to PS is a four-component combustion reaction model. Moreover, it is found that the addition of biomass can promote the combustion reaction of coal gangue and the production of gas products using Fourier transform infrared spectroscopy technology. Through combustion, the proportion of F4 mode of Cr, Cd, Pb, Cu, and Ni for CG sample increased from 92%, 60%, 52%, 28% and 60% to 95%, 90%, 82%, 91% and 94%, respectively. The toxicity reduction effect for Cd, Pb, Cu, and Ni is obvious, and the proportion of F4 mode is increased by more than 30%. Compared with other mixed samples, the ash formed by C1P1 is less harmful.