Abstract
Biomass is a carbon-neutral fuel and has a potential to be used in pulverized coal injection (PCI) technology in ironmaking blast furnaces (BFs). Compared with pulverized coal particles, biomass particles vary considerably in particle shape, and thus the change of aspect ratio of biomass particles may affect the motion and conversion of biomass particles. In this study, a computational fluid dynamics (CFD) model is developed to simulate the flow and thermo-chemical behaviors related to biomass injection into BFs. The model features non-spherical particle shapes and an improved devolatilization model. The model is then applied to a pilot-scale test of charcoal injection using a pilot-scale PCI test rig under simulated BF conditions for model validation. The burnout comparisons between simulation and measurement indicate that compared to spherical particles, the non-spherical particles show smaller burnouts due to the shorter travelling time in the chamber; moreover, the burnouts predicted by the model cons...
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