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首页> 外文期刊>ISIJ international >Melting and Reduction Behaviour of Individual Fine Hematite Ore Particles
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Melting and Reduction Behaviour of Individual Fine Hematite Ore Particles

机译：赤铁矿细颗粒的熔化和还原行为

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摘要

Hlsama is a new alternative ironmaking process of ULCOS program, which is under intensive development at EU. It uses coal and fine iron ore directly as raw materials instead of coke and pellet. In this context, the melting and pre-reduction behaviour of hematite ore in the smelting cyclone of Hlsama process was studied in the laboratory scale. The experimental study which used the typical reaction conditions of smelting cyclone in the pilot plant supplies a good reference to the Hlsama process and the results are helpful on determining the temperature range, gas composition and particle size in the smelting cyclone. All the experiments were performed in a High-temperature Drop Tube Furnace. The experimental temperature was varied from 1 550 K to1 750 K. A series of experiments have been conducted with different reaction time which was varied from 210 ms to 2 020 ms, thus enabling the characterization of partially reduced samples. It was found that the reduction degree increases with the increase of temperature and residence time, while decreases with the increase of particle size. The maximum reduction degree at the studied conditions is approximately in the range of 23-30%. Both solid sample and molten sample were obtained at the current experimental conditions. The completely gas-solid particle reduction took place at 1 550 K, 1 600 K for the residence time up to 2020 ms. Fully molten particles can only be obtained at the temperature higher than 1 700 K.
机译：Hlsama是ULCOS计划的替代炼铁新工艺，欧盟正在大力开发中。它直接使用煤和铁精粉作为原料，而不是焦炭和颗粒。在此背景下，在实验室规模下研究了赤铁矿矿石在Hlsama工艺熔炼旋风中的熔化和还原前行为。在中试装置中使用熔炼旋流器的典型反应条件进行的实验研究为Hlsama工艺提供了很好的参考，结果有助于确定熔炼旋流器的温度范围，气体成分和粒径。所有实验均在高温滴管炉中进行。实验温度从1 550 K到1 750 K不等。已经在不同的反应时间（从210 ms到2020 ms）之间进行了一系列实验，从而能够表征部分还原的样品。发现还原度随温度和停留时间的增加而增加，而随粒径的增加而减少。在研究条件下的最大还原度约为23-30％。在当前的实验条件下均获得了固体样品和熔融样品。气固颗粒的完全还原发生在1550 K，1600 K上，停留时间长达2020 ms。仅在高于1 700 K的温度下才能获得完全熔融的颗粒。

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  • 来源
    《ISIJ international》 |2015年第1期|149-157|共9页
  • 作者

    Yingxia QU; Yongxiang YANG; Zongshu ZOU; Christiaan ZEILSTRA; Koen MEIJER; Rob BOOM;

  • 作者单位

    School of Materials and Metallurgy, Northeastern University, Box 312, No. 3-11, Wenhua Road, Heping District, Shenyang, 110819 P. R. China;

    Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, the Netherlands;

    School of Materials and Metallurgy, Northeastern University, Box 312, No. 3-11, Wenhua Road, Heping District, Shenyang, 110819 P. R. China;

    Tata Steel, 1970 CA IJmuiden, the Netherlands;

    Tata Steel, 1970 CA IJmuiden, the Netherlands;

    Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, the Netherlands;

  • 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

    Hlsarna process; individual fine particle; melting behaviour; reduction kinetics; morphological study; high temperature;

    机译：赫尔萨纳过程;单个细颗粒;行为融化;还原动力学;形态学研究高温;

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