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首页> 外文期刊>ISIJ international >Reduction of CO_2 Emissions by Use of Pre-reduced Iron Ore as Sinter Raw Material
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Reduction of CO_2 Emissions by Use of Pre-reduced Iron Ore as Sinter Raw Material

机译：通过使用预还原铁矿石作为烧结原料减少CO_2排放

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摘要

In order to reduce CO_2 emissions at an ironmaking process, it is an effective measure to decrease a bonding agent rate at an iron ore sinter plant. In this study, effect of using a pre-reduced iron ore as a part of a sinter raw material on a sintering process was investigated mainly from a viewpoint of decreasing a bonding agent rate. Two brands of pisolitic iron ores were reduced up to wustite at 1 173 K with reducing gas of which an oxidation degree was 55%. The pre-reduced iron ore was stable against reoxidation in the atmosphere and through a cyclic wet and dry treatment. Two brands of pisolitic iron ores and a Marra Mamba iron ore were pre-reduced and then used in a sinter pot test. A use of the pre-reduced iron ore was effective in decreasing a bonding agent rate at a given productivity. The reoxidation heat of the pre-reduced iron ore was estimated to be less than the combustion heat of the bonding agent being saved by use of the pre-reduced iron ore. The reoxidation heat is more effective in the sintering process than the combustion heat. The decrease of the bonding agent resulted in reduction of NO_x emissions. A mass and heat balance shows that a use of a pre-reduced iron ore as a sinter raw material enables reduction of CO_2 emissions not only at an ironmaking process but also at a whole integrated steel works.
机译：为了减少炼铁过程中的CO 2排放，降低铁矿石烧结厂中的粘结剂率是一种有效的措施。在该研究中，主要从降低粘合剂率的观点出发，研究了使用预还原铁矿石作为烧结原料的一部分对烧结过程的影响。在173 K时，用氧化度为55％的还原性气体将两个牌号的品脱硅铁矿石还原成铁矾体。预先还原的铁矿石在大气中以及经过循环的湿法和干法处理后对再氧化稳定。预先还原了两个牌号的pilosolitic铁矿石和Marra Mamba铁矿石，然后用于烧结罐测试。在给定的生产率下，使用预还原的铁矿石可有效降低粘合剂的比率。估计该预还原铁矿石的再氧化热小于通过使用该预还原铁矿石而节省的粘结剂的燃烧热。在烧结过程中，再氧化热比燃烧热更有效。粘合剂的减少导致NO_x排放的减少。质量和热量的平衡表明，使用预还原铁矿石作为烧结原料不仅可以减少炼铁过程中的二氧化碳排放，而且还可以减少整个炼钢厂的CO_2排放。

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  • 来源
    《ISIJ international》 |2013年第9期|1625-1632|共8页
  • 作者

    Hideaki YABE; Yasushi TAKAMOTO;

  • 作者单位

    Nippon Steel & Sumitomo Metal Corporation, Process Research Laboratories, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Nippon Steel & Sumitomo Metal Corporation, Process Research Laboratories, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

  • 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

    sinter plant; blast furnace gas; pre-reduced iron ore; coke breeze saving;

    机译：烧结厂高炉煤气预还原铁矿石节约焦炭;

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