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Utilization of coal gangue and copper tailings as clay for cement clinker calcinations

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Abstract

In order to avoid environmental pollution from Coal gangue (CG) and copper tailings (CT), the utilization as cement clinker calcinations was experimentally investigated. Low-calcium limestone was also selected as another raw material. The clinker component and microstructure were analyzed by XRD and SEM. The experimental results showed that qualified cement clinker could be generated by substituting CG and CT compound for clay. While mixed with high-calcium limestone and low-calcium limestone, the calcinations temperature were 50 °C or 100 °C lower than that of clay. CT and CG contain oxygen-rich minerals and potential of geological rock energy. The energy of CG performs functions and drops down sintering temperature. The calcination time was shortened and the clinker sintering coal consumption reduced while substituting CG and CT for clay, and also served the reutilization of low-calcium limestone, CG and CT.

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Authors and Affiliations

  1. State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China

    Guohua Qiu  (裘国华), Zhongyang Luo, Zhenglun Shi  (施正伦) & Mingjiang Ni

  2. College of Communication Engineering, China Jiliang University, Hangzhou, 310018, China

    Guohua Qiu  (裘国华)

Authors
  1. Guohua Qiu  (裘国华)
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  2. Zhongyang Luo
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  3. Zhenglun Shi  (施正伦)
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  4. Mingjiang Ni
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Corresponding author

Correspondence to Zhenglun Shi  (施正伦).

Additional information

Funded by the “11th-Five-Year” National Key Technologies R&D Program of China (No.2006BAC21B02)

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Qiu, G., Luo, Z., Shi, Z. et al. Utilization of coal gangue and copper tailings as clay for cement clinker calcinations. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 26, 1205–1210 (2011). https://doi.org/10.1007/s11595-011-0391-1

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  • DOI: https://doi.org/10.1007/s11595-011-0391-1

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