Metall. Res. Technol.
Volume 115, Number 4, 2018
|Number of page(s)||9|
|Published online||22 August 2018|
Thermal and kinetic analysis on the co-combustion behaviors of anthracite and PVC
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,
100083, PR China
2 School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
Accepted: 28 June 2018
The co-combustion characteristics of anthracite and PVC were investigated by thermogravimetric analysis to study its application in BF. First, the combustion characteristics were investigated. It was found the initial combustion temperature (Ti) of blends decreased with the increase of PVC ratio, while its decreasing rate reached maximum when 10% PVC. Aiming for further characterizing the combustion kinetics, ten gas-solid reaction mechanism functions were adopted for different groups. Results showed that Dimensional Diffusion Model is the best model to describe the combustion kinetics of anthracite and PVC. With this model, combustion kinetic parameters were calculated at 5 °C/min, and the Ea decreases with the addition of PVC. Kinetics compensation effect between the Ea and A was also observed. By Fourier Transform Infrared Spectroscopy (FTIR) analysis, significant differences of elements and functional groups were observed. This study provides theoretical guidance for the utilization of PVC as alternative fuels for BF ironmaking.
Key words: anthracite / PVC / combustion thermodynamics / kinetic / structure
© EDP Sciences, 2018
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