Combustion of high mesh content waste tires and coal for blast furnace injection via thermogravimetric analysis
Gabriel Penna Kramer Lima; Hector Alejandro Picarte Fragoso; Juliana Gonçalves Pohlmann; Antônio Cezar Farias Vilela; Eduardo Osório
Abstract
In this study, the combustion characteristics of pulverized high mesh content waste tire and low-volatile coal were examined, along with the co-combustion behaviors of blends incorporating 5%, 10%, and 30% waste tire content. The primary objective was to assess their combustibility using a thermogravimetric analyzer, focusing on the potential for partially substituting pulverized coal (PCI) in blast furnaces. Additionally, the composition of the ashes from individual fuels and the higher heating value (HHV) of individual fuels and their blends were also determined. The ash composition analysis of waste tires revealed a predominance of iron and zinc, with low levels of alkalis and phosphorus. Generally, the co-combustion behaviors were consistent with the summation of the individual components. Notably, the tests showed that adding waste tires reduced the coal’s ignition temperature. In the initial combustion stages, waste tire addition increased the degree of conversion, while sustaining this conversion in later stages, thus providing a combustion support effect. Among the tested blends, the 10% waste tire addition exhibited the best performance, balancing improved combustion behavior with adherence to ash content limits.
Keywords
References
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Submitted date:
12/09/2024
Accepted date:
02/06/2025
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