Thermogravimetric analysis of combustion characteristics of coal gangue and petroleum coke mixture

Abstract

In order to improve the comprehensive combustion efficiency of the steam coal and reduce waste of resources, combustion experiments of petroleum coke and coal gangue were carried out by thermogravimetric analyser at different proportions and heating rates. Combustion characteristic curves (TG, DTG, DTA) and combustion characteristic parameters of the blended samples were analysed by thermogravimetric analysis and thermogravimetric analysis. The optimum combustion ratio and combustion characteristic parameters of the blended samples were explored. Experiments show that the combustion performance of petroleum coke and coal gangue is the best when the mixture ratio of petroleum coke and coal gangue is 4:1 in air atmosphere and the flow rate is 30ml/min, and the combustion characteristics of petroleum coke and coal gangue are better than that of single sample. The burning effect of the mixed fuel is the best. The exothermic area of 15°C/min and 25°C/min is greater than that of 20°C/min, which indicates that the heating rate of 20°C/min is not conducive to exothermic.