Phases Transformation of Boron Mud during Carbothermal Reduction Process

Abstract:

By using the industrial waste boron mud as raw material, graphite as reductant, coke particles as burying materials. During carbothermal reduction process, the Mg-Fe forsterite phase in boron mud row materials can transformed into forsterite and Fe₂O₃ at 1550°C and 1600°C for 3 h, and the Fe₃C can be generated from the partial reduction of Fe₂O₃ with graphite, The main phase in samples calcined under 1650°C for 3 h contained forsterite, Fe₂O₃, Fe₃C and β-SiC. The compound powder of Mg₂SiO₄ and β-SiC was prepared through the carbothermal reduction process. The effects of different graphite proportion (theoretical proportion, exceeding 10%, 50% and 100%) and firing temperature (1550°C, 1600°C and 1650°C) on the phase transformation and microstructure of the products were investigated by XRD, SEM and EDS. The results show that β-SiC powders were obtained at 1650°C for 3 h when graphite content was theoretical.

• Periodical: Key Engineering Materials (Volume 492)
• Pages: 415-418
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.492.415
• Online since: September 2011
• Authors: Xiao Chao Li, Zhao Hui Huang, Yang Gai Liu, Ming Hao Fang
• Keywords: Boron Mud, Carbothermal Reduction, Phase Transformation, ß-SiC

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