Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Manufacturing of Ultra-light Ceramsite from Slate Wastes in Shangri-la, China

  • Li, Zhen (Faculty of Environmental Science and Engineering, Kunming University of Science and Technology) ;
  • Zhang, Haodong (Faculty of Environmental Science and Engineering, Kunming University of Science and Technology) ;
  • Zhao, Pengshan (Faculty of Environmental Science and Engineering, Kunming University of Science and Technology) ;
  • He, Xiaoyun (Yuntou Sci. & Tech. Ecological Co., Ltd. of Yunnan) ;
  • Duan, Xiaowei (Yunnan Jingtai Science and Technology Co., Ltd.)
  • Received : 2017.10.06
  • Accepted : 2017.11.20
  • Published : 2018.01.31
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Abstract

The physical and chemical analyses of mineral waste such as moisture content, water absorption, freezing-thawing resisting sexual, chemical composition and crystal structure were investigated. In the technological process of crushing, screening, molding, drying, preheating, sintering and cooling, many parameters were changed to eliminate the influence of freeze thaw stability and the ball billets were processed into slate ceramsites eventually. Adopting orthogonal experiment and range analysis, the optimal technology parameters were confirmed as preheating temperature of $300^{\circ}C$ for 25 minutes and sintering temperature of $1230^{\circ}C$ for 20 minutes. Slate wastes in Shangri-la could foam and expand without any additive. The ultra-light ceramsite could be directly used as building aggregate, since the analysis results of its leaching toxicity were eligible. Besides, effects of sintering temperature on physical property and crystal phase were also explored in this study.

Keywords

References

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