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Wu Houqin, Li Jun, Lu Zhongyuan, Xu Longhua, Guan Bo, Wei Yanfei. Recycling of the iron resources of CFBC fly ash by magnetizing roasting-magnetic separation[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1500-1504.
Citation: Wu Houqin, Li Jun, Lu Zhongyuan, Xu Longhua, Guan Bo, Wei Yanfei. Recycling of the iron resources of CFBC fly ash by magnetizing roasting-magnetic separation[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1500-1504.
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Recycling of the iron resources of CFBC fly ash by magnetizing roasting-magnetic separation

  • 1.

    State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China

  • 2.

    School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China

  • 3.

    Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China

  • Received Date: 13/12/2012
    Accepted Date: 24/10/2012
    Available Online: 09/04/2013
    Fund Project:
  • In southwest China, lots of dark red coal-fired ashes with certain amount of hematite are generated because of the presence of pyrites in raw coals. It is necessary to recycle this part of iron resources in coal-fired ashes with relatively high content of iron. Iron recycling of circulating fluidized bed combustion (CFBC) fly ashes by magnetizing roasting-magnetic separation was studied. Results showed that iron with content grade of 58.02% and recovery rate of 88.27% could be obtained under the experimental conditions: -800℃ of roasting temperature, 90 min of roasting time, 5% of reducing agent dosage, 200 kA/m of magnetic field intensity and 80 kA/m of magnetic field intensity of cleaning.
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Recycling of the iron resources of CFBC fly ash by magnetizing roasting-magnetic separation

  • Received Date: 13/12/2012
  • Accepted Date: 24/10/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: In southwest China, lots of dark red coal-fired ashes with certain amount of hematite are generated because of the presence of pyrites in raw coals. It is necessary to recycle this part of iron resources in coal-fired ashes with relatively high content of iron. Iron recycling of circulating fluidized bed combustion (CFBC) fly ashes by magnetizing roasting-magnetic separation was studied. Results showed that iron with content grade of 58.02% and recovery rate of 88.27% could be obtained under the experimental conditions: -800℃ of roasting temperature, 90 min of roasting time, 5% of reducing agent dosage, 200 kA/m of magnetic field intensity and 80 kA/m of magnetic field intensity of cleaning.

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