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2023 | OriginalPaper | Chapter
Characterizing Bio-carbon for Metallurgical Processes Using Micro X-ray Computed Tomography with High Temperature Experiments
Authors : Stein Rørvik, Nicholas Smith-Hanssen, Sethulakshmy Jayakumari, Liang Wang
Published in: Advances in Pyrometallurgy
Publisher: Springer Nature Switzerland
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Abstract
An important path to the goal of reducing the metal producing industries’ CO2 footprint is to replace fossil carbon sources with bio-based carbon sources for the electrodes and reductant agents. Since the structure of bio-carbon is substantially different from fossil carbon, characterizing the bio-carbon structure and examining its behaviour during the relevant processes are important. Focusing on the silicon and ferroalloy industries in Norway, micro X-ray computed tomography (µCT) has been used to analyse and compare single grains of bio-carbon before and after various experimental procedures. These procedures consist of high temperature treatment under different conditions for CO/CO2 and SiO gas reactivity test, K-impregnation and CH4-based carbon deposition. This paper shows examples on results from µCT measurements before and after the experiments, and describes briefly the data processing methods applied. The relevance to the experiments and industrial applications is also discussed.