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Direct Reduction of Ferrous Oxides to form an Iron-Rich Alternative Charge Material

机译：直接还原氧化亚铁形成富铁替代装料

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摘要

In this study, production of sponge iron by direct reduction of oxides and the effect of reductant on metallization were investigated. In the first stage of the study, scale formed during hot rolling of slabs was reduced in a rotating furnace using solid and gas reduc-tants. Coal was used as solid reductant and hydrogen released from the combustion reaction of LNG was used as the gas one. The sponge iron produced by direct reduction was melted and solidified. In the second stage, Hematite ore in the form of pellets was reduced using solid carbon in a furnace heated up to 1,100℃ for 60 and 120 minutes. Reduction degree of process was evaluated as a function of time and the ratio of C_(fix)/ Fe_(total). In the third stage, final products were examined using scanning electron microscope and microanalysis was carried out by energy dispersive x-ray spectrometer attached to the electron microscope. It is concluded that (ⅰ) direct reduction using both solid and gas reductants caused higher metallization compared to using only solid reductant, (ⅱ) as the reduction time and ratio of C_(fix)/ Fe_(total) increased %-reduction of ore increased.
机译：在这项研究中，研究了通过直接还原氧化物生产海绵铁以及还原剂对金属化的影响。在研究的第一阶段，在板坯热轧过程中使用固态和气态还原剂减少了板坯的结垢。煤用作固体还原剂，LNG燃烧反应释放的氢气用作气体。通过直接还原产生的海绵铁被熔化并固化。在第二阶段中，使用固态碳在加热到1,100℃的炉中60和120分钟还原球团状的赤铁矿。将过程的还原程度作为时间和C_（fix）/ Fe_（total）之比的函数进行评估。在第三阶段中，使用扫描电子显微镜检查最终产品，并通过附在电子显微镜上的能量色散X射线光谱仪进行微分析。结论是：与仅使用固体还原剂相比，（ⅰ）使用固体和气体还原剂直接还原会导致更高的金属化程度；（ⅱ）还原时间和C_（fix）/ Fe_（total）的还原比例增加了矿石的％还原率增加。

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  • 来源
    《High temperature materials and processes》 |2015年第8期|751-756|共6页
  • 作者

    H. ibrahim UEnal; Enes Turgut; S. H. Atapek; Attila Alkan;

  • 作者单位

    Kocaeli University, Dept. of Metallurgical and Materials Engineering, Umuttepe Campus, Kocaeli, 41380, Turkey;

    Kocaeli University, Dept. of Metallurgical and Materials Engineering, Umuttepe Campus, Kocaeli, 41380, Turkey;

    Kocaeli University, Dept. of Metallurgical and Materials Engineering, Umuttepe Campus, Kocaeli, 41380, Turkey;

    Kocaeli University, Dept. of Metallurgical and Materials Engineering, Umuttepe Campus, Kocaeli, 41380, Turkey;

  • 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    reduction; mill scale; metallization; sponge iron; characterization;

    机译：减少;轧机规模金属化海绵铁表征;

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