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首页> 外文期刊>ISIJ international >Coproduction of DRI Powder and Semi-coke from Siderite Ore and Low Rank Coal by Excessive Coal-based Direct Reduction in Rotary Kiln
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Coproduction of DRI Powder and Semi-coke from Siderite Ore and Low Rank Coal by Excessive Coal-based Direct Reduction in Rotary Kiln

机译：通过过量的煤基直接还原在回转窑中从菱铁矿和低品位煤联合生产DRI粉末和半焦

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摘要

Effective utilization of low grade iron ore and low rank coal by excessive coal-based direct reduction process to coproduce DRI powder and semi-coke can be one of the solutions to cut the high cost of DRI powder and solve the problem of DRI shortage in the steelmaking industrial in China. In this paper, an integrated process was developed to beneficiate low grade siderite ore and upgrade inferior coal simultaneously to yield DRI powder and semi-coke. Based on bench scale results, the pilot scale verification tests were conducted and the final DRI concentrate assaying 92.62% Fe_(total), 93.51% metallization degree was obtained at total iron recovery of 82.98%. Meanwhile, C/Fe mass ratio was elevated to 2.50 in the direct reduction of siderite to generate semi-coke as by-product, which contained 76.11% fixed carbon. Based on the characterization of the semi-coke, it can be used as solid fuel in the iron ore sintering to replace coke breeze and cut production cost. The integrated process provides an attractive way to manufacture good quality burdens for electric furnace and alternative solid fuel for metallurgy industry.
机译：通过过度的煤基直接还原工艺有效利用低品位铁矿石和低品位煤来联产DRI粉和半焦炭，可以作为降低DRI粉高成本，解决国内DRI短缺问题的解决方案之一。中国的炼钢工业。本文开发了一种集成工艺，可对低品位菱铁矿进行选矿并同时升级劣质煤，以生产DRI粉和半焦炭。根据工作台规模的结果，进行了中试规模的验证测试，最终的DRI精矿含量为92.62％（总铁），金属化程度为93.51％，总铁回收率为82.98％。同时，通过直接还原菱铁矿，将C / Fe质量比提高到2.50，生成副产物半焦，该副焦含有76.11％的固定碳。根据半焦的特性，它可以用作铁矿石烧结过程中的固体燃料，以代替焦风，降低生产成本。集成工艺为制造用于冶金工业的电炉和替代固体燃料提供了良好的质量负担，这提供了一种有吸引力的方法。

著录项

  • 来源
    《ISIJ international》 |2016年第1期|78-87|共10页
  • 作者

    Yanhong LUO; Deqing ZHU; Xianlin ZHOU; Bengjing SHI; Feng ZHANG;

  • 作者单位

    School of Minerals Processing and Bioengineering, Central South University, Lushan South Road 932, Yuelu District, Changsha, 410083 China;

    School of Minerals Processing and Bioengineering, Central South University, Lushan South Road 932, Yuelu District, Changsha, 410083 China;

    School of Minerals Processing and Bioengineering, Central South University, Lushan South Road 932, Yuelu District, Changsha, 410083 China;

    School of Minerals Processing and Bioengineering, Central South University, Lushan South Road 932, Yuelu District, Changsha, 410083 China;

    School of Minerals Processing and Bioengineering, Central South University, Lushan South Road 932, Yuelu District, Changsha, 410083 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    siderite; low rank coal; coal-based direct reduction; DRI; semi-coke; rotary kiln;

    机译：菱铁矿低阶煤煤基直接还原DRI;半焦回转窑;

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