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Research on Preparation and Performance of Vandium Tailings-based Geopolymer

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Abstract

Vanadium-beard bone coal is one of important vanadium resources in China. to extract vanadium tailings from Stone coal is prduced after extracted vanadium from stone coal through the roasting, leaching and other processes. About 120-150 tons of tailings will be produced in extracting 1 ton of vanadium pentoxide. A lot of tailings that are willfully piled up have caused serious environmental pollution and wasting of resources; it is therefore necessary to realize its resource utilization. This study increases the activity of vanadium tailings by means of alkali fusion, and then uses different alkali activators to react with vanadium tailings so that geopolymer with high value added is produced. Sample of geopolymer is acquired from mixture containing vanadium tailings, alkali activators, water and a little sodium aluminate through compression-molding process under 20MPa pressure. After cured in room temperature for three days, the maximum compressive strength of the sample can reach 36.2MPa. XRD analysis indicates: quartz, the major crystal phase in vanadium tailings is decomposed and the activity of vanadium tailings is heightened. FTIR and SEM analyses show: structural change having important impact on the mechanical strength of geopolymer occurred during the process of vanadium tailings generating geopolymer.

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Authors and Affiliations

  1. School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China

    Tie-jun Chen, Yi-min Zhang, Xiang-ke Jiao & Jie Zhao

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  1. Tie-jun Chen
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  2. Yi-min Zhang
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  3. Xiang-ke Jiao
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  4. Jie Zhao
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Chen, Tj., Zhang, Ym., Jiao, Xk. et al. Research on Preparation and Performance of Vandium Tailings-based Geopolymer. MRS Online Proceedings Library 1380, 15 (2011). https://doi.org/10.1557/opl.2012.412

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