|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||Synthesis of Chromite for Subsequent Carburization by Methane-hydrogen Gas Mixture
||Vincent Canaguier, Leiv Kolbeinsen, Ingeborg-Helene Svenum
|On-Site Speaker (Planned)
The purpose of this work was to produce synthetic chromite in order to assess the influence of the chromite composition on the carburization process. Thus, pelletized and sintered synthetic chromite samples from the (Fe,Mg)(Cr,Al)<SUB>2</SUB>O<SUB>4</SUB> system were prepared by induction skull melting of pure reagents. The optimal conditions for the synthesis were considered. The pellets were later reduced and carburized using Ar-H<SUB>2</SUB>-CH<SUB>4</SUB> gas mixtures with high carbon activity at elevated temperatures in both isothermal and non-isothermal experiments. The reaction starting temperature, reaction extent, the graphite formation and the off-gas composition were evaluated. The product phases after both synthesis and carburization were identified using X-Ray Diffraction (XRD) analysis, X-ray Photoelectron Spectroscopy (XPS) and oxygen analysis. The microstructure was analyzed by Scanning Electron Microscope (SEM) and Electro-Probe Micro-Analysis (EPMA). The effects of Al and Mg on the synthesis route and on the reduction/carburization reaction mechanisms are discussed.
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