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首页> 外文期刊>ISIJ international >Effect of Large Amount of Co-injected Gaseous Reducing Agent on Combustibility of Pulverized Coal Analyzed with Non-Contact Measurement
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Effect of Large Amount of Co-injected Gaseous Reducing Agent on Combustibility of Pulverized Coal Analyzed with Non-Contact Measurement

机译：大量共注射气体还原剂对非接触式测量分析粉煤煤的燃烧的影响

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摘要

Nowadays, reduction of amounts of CO_2 from ironmaking process is important from the aspect of prevention of the global warming. COURSE50 is Japanese national project which aims to reduce the amount of CO_2 emission from ironmaking process by 30% by 2050. In COURSE50, we try to reduce iron oxide with H_2 to decrease amounts of carbon use, by injecting large amount of gas containing H_2 and pulverized coal (PC) from tuyere. In that case, PC combustibility can be different from that in general blast furnace condition, due to high co-injected reducing gas ratio. Though a large number of researches about PC combustion around tuyere of blast furnace has been carried out, the effect of large amounts of co-injected reducing gas on PC combustibility was hardly investigated. To evaluate that, we conducted experiments with two experimental furnaces equipped with various non-contact measurement apparatus and found that; 1) The larger amounts of co-injected reducing gas were, the faster O_2 and CO_2 consumption, and CO and H_2 generation in the raceway. 2) The amounts of co-injected reducing gas should be optimized for higher PC combustibility. 3) Co-injected reducing gas activated PC combustion by raising PC temperature, and that resulted in acceleration of PC. 4) Trade-off relationship between rapid heating effect and O_2 consumption of co-injected reducing gas could determine the optimum amounts of reducing gas. Consequently, we elucidated how we could co-inject reducing gas with PC as reducing agents without deteriorating PC combustibility.
机译：如今，从防止全球变暖的方面，从炼铁过程中减少了CO_2的量。当地是日本国家项目，旨在将炼铁过程中的CO_2排放量减少30％到2050年。在进案中，我们试图通过注入含有H_2的大量气体来减少氧化铁以减少碳的数量。来自风口的煤粉（PC）。在这种情况下，由于高共注入的降低气体比，PC可燃性可以与一般的高炉状况不同。虽然已经进行了关于对高炉风口周围的PC燃烧的大量研究，但很难研究大量共注入的降低气体对PC可燃性的影响。为了评估，我们用配备有各种非接触式测量装置的两种实验炉进行了实验，并发现了; 1）较大量的共注射的还原气体是较快的O_2和CO_2消费，以及滚道中的CO和H_2。 2）应优化共注入的还原气体的量，以获得更高的PC可燃性。 3）通过提高PC温度，共注入降低气体活化的PC燃烧，导致PC的加速度。 4）快速加热效应与o_2 o_2的互补减小气体消耗之间的权衡关系可以确定还原气体的最佳量。因此，我们阐明了我们如何用PC共注出的气体作为还原剂，而不会降低PC可燃性。

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  • 来源
    《ISIJ international》 |2020年第8期|1662-1668|共7页
  • 作者

    Kota MORIYA; Koichi TAKAHASHI; Akinori MURAO; Takeshi SATO; Kiyoshi FUKADA;

  • 作者单位

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 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

    COURSE50; ironmaking; blast furnace; CO_2; pulverized coal injection; COG; reformed BFG;

    机译：当地;熨烫;高炉;CO_2;粉煤喷射;COG;改革了BFG.;

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