Preparation of Bauxite-Based Homogenized Mullite Grogs with Bauxite and Coal Gangue

Abstract:

The sintering behavior, physical properties and heat processing changes of bauxite-based homogenized grogs prepared by homogenization process and high temperature sintering using bauxite as starting material were investigated. Results show that the bauxite-based mullite can be synthesized by the method, sintering temperature with and without MgO/CeO₂ sintering aids are 1600°C and 1700°C separately, the mullite with apparent porosity of＜1.0% and 2.5%, bulk density of ≥2.87g•cm^-3 and 2.75g•cm^-3, Refracteriness-Under-Load(RUL) 1600°C and 1620С; changes in the heat processing is divided into three stages: dehydration stage(400°С~900°С ), primary mullitization stage(1000°С ~1200°С) and secondary mullitization stage(>1200°С).

• Periodical: Advanced Materials Research (Volumes 199-200)
• Pages: 1940-1944
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.199-200.1940
• Online since: February 2011
• Authors: Zhong Zheng Yang, Zhen Xian Xing, Zhan Fang Gai, Huan Qiang Liu
• Keywords: Bauxite, Coal Gangue, Mullite, Processing, Sintering

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