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首页> 外文会议>Characterization of minerals, metals, and materials 2018 >Pilot Trial of Detoxification of Chromium Slag in Cyclone Furnace and Preparation of Glass-Ceramics with the Water-Quenched Melt
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Pilot Trial of Detoxification of Chromium Slag in Cyclone Furnace and Preparation of Glass-Ceramics with the Water-Quenched Melt

机译：旋风炉中铬渣的解毒试验和水淬熔体制备微晶玻璃

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摘要

Pilot trial of the detoxification of chromium slag in cyclone furnace and the preparation of glass-ceramics were investigated in a power plant in China. 10 wt.% chromium slag were mixed with pulverized bituminous coal and limestone as the raw materials of the cyclone furnace. Cr(VI) in chromium slag was reduced to Cr_2O_3 inside the cyclone furnace. The melt was water-quenched into frit and then fired into glass-ceramics with a laboratory ceramic roller kiln. The preparation and crystallization behavior of glass-ceramics were investigated with differential thermal analysis (DTA), physical and mechanical properties testing, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optimal flexural strength exceeding 90 MPa were achieved in firing temperature zone of 1170-1200 °C. Anorthite (CaAl_2Si_2O_8) and diopside [Ca(Mg, Fe)Si_2O_6] can be identified in the glass-ceramics and CaAl_2Si_2O_8 is the predominant crystal phase. Fine particles with average diameter of 200 nm distributed uniformly in the glass-ceramics. Granular crystals are intensively interconnected and constituted a crystal skeleton soaked in the glass matrix. Leaching toxicity test detected Cr(VI) of 0.016 and 0.010 mg/L of the water-quenched frit and glass-ceramics, respectively. This method provides an effective and comprehensive technique for the detoxification and utilization of chromium slag at low cost and large-scale.
机译：在中国的一家发电厂，对旋风炉中铬渣的解毒试验和玻璃陶瓷的制备进行了试验研究。将10重量％的铬渣与粉状的烟煤和石灰石混合，作为旋风炉的原料。在旋风炉内，铬渣中的Cr（VI）还原为Cr_2O_3。将熔体水淬成玻璃料，然后用实验室陶瓷辊式窑烧成玻璃陶瓷。通过差热分析（​​DTA），物理和力学性能测试，X射线衍射（XRD）和扫描电子显微镜（SEM）研究了微晶玻璃的制备和结晶行为。在1170-1200°C的烧成温度范围内达到了超过90 MPa的最佳抗弯强度。在玻璃陶瓷中可以鉴定出钙长石（CaAl_2Si_2O_8）和透辉石[Ca（Mg，Fe）Si_2O_6]，CaAl_2Si_2O_8是主要的晶相。平均直径为200 nm的细颗粒均匀地分布在玻璃陶瓷中。粒状晶体紧密地相互连接，并构成了浸入玻璃基质中的晶体骨架。浸出毒性试验检测到水淬玻璃料和玻璃陶瓷的Cr（VI）分别为0.016和0.010 mg / L。该方法为低成本，大规模的铬渣的脱毒和利用提供了有效而全面的技术。

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  • 会议地点 Phoenix(US)
  • 作者

    Guizhou Zhao; Lingling Zhang; Daqiang Cang;

  • 作者单位

    School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chromium slag; Cyclone furnace; Detoxification Glass-ceramics;

    机译：铬渣；旋风炉；排毒微晶玻璃;

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