留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
Volume 22 Issue 5
May  2015
数据统计

分享

计量
  • 文章访问数:  343
  • HTML全文浏览量:  77
  • PDF下载量:  14
  • 被引次数: 0
Yi-zhong Yuan, Yi-min Zhang, Tao Liu,  and Tie-jun Chen, Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coal, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 476-482. https://doi.org/10.1007/s12613-015-1096-9
Cite this article as:
Yi-zhong Yuan, Yi-min Zhang, Tao Liu,  and Tie-jun Chen, Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coal, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 476-482. https://doi.org/10.1007/s12613-015-1096-9
引用本文 PDF XML SpringerLink

Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coal

  • 通讯作者:

    Yi-min Zhang    E-mail: zym126135@126.com

  • Experiments comparing microwave blank roasting and conventional blank roasting for typical vanadium-bearing stone coal from Hubei Province in central China, in which vanadium is present in muscovite, were conducted to investigate the effects of roasting temperature, roasting time, H2SO4 concentration, and leaching time on vanadium extraction. The results show that the vanadium leaching efficiency is 84% when the sample is roasted at 800℃ for 30 min by microwave irradiation and the H2SO4 concentration, liquid/solid ratio, leaching temperature, and leaching time are set as 20vol%, 1.5:1 mL·g-1, 95℃, and 8 h, respectively. However, the vanadium leaching efficiency achieved for the sample subjected to conventional roasting at 900℃ for 60 min is just 71% under the same leaching conditions. Scanning electron microscopy (SEM) analysis shows that the microwave roasted samples contain more cracks and that the particles are more porous compared to the conventionally roasted samples. According to the results of X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) analyses, neither of these roasting methods could completely destroy the mica lattice structure under the experimental conditions; however, both methods deformed the muscovite structure and facilitated the leaching process. Comparing with conventional roasting, microwave roasting causes a greater deformation of the mineral structure at a lower temperature for a shorter roasting time.

  • Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coal

    + Author Affiliations
    • Experiments comparing microwave blank roasting and conventional blank roasting for typical vanadium-bearing stone coal from Hubei Province in central China, in which vanadium is present in muscovite, were conducted to investigate the effects of roasting temperature, roasting time, H2SO4 concentration, and leaching time on vanadium extraction. The results show that the vanadium leaching efficiency is 84% when the sample is roasted at 800℃ for 30 min by microwave irradiation and the H2SO4 concentration, liquid/solid ratio, leaching temperature, and leaching time are set as 20vol%, 1.5:1 mL·g-1, 95℃, and 8 h, respectively. However, the vanadium leaching efficiency achieved for the sample subjected to conventional roasting at 900℃ for 60 min is just 71% under the same leaching conditions. Scanning electron microscopy (SEM) analysis shows that the microwave roasted samples contain more cracks and that the particles are more porous compared to the conventionally roasted samples. According to the results of X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) analyses, neither of these roasting methods could completely destroy the mica lattice structure under the experimental conditions; however, both methods deformed the muscovite structure and facilitated the leaching process. Comparing with conventional roasting, microwave roasting causes a greater deformation of the mineral structure at a lower temperature for a shorter roasting time.

    • loading

    Catalog


    • /

      返回文章
      返回