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首页> 外文期刊>ISIJ international >Melting Separation Process of High Chromium Vanadium-bearing Titanomagnetite Metallized Pellet and its Optimization by Multi-Index Synthetic Weighted Scoring Method
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Melting Separation Process of High Chromium Vanadium-bearing Titanomagnetite Metallized Pellet and its Optimization by Multi-Index Synthetic Weighted Scoring Method

机译：高铬钒钛磁铁矿金属化球团的熔融分离工艺及其多指标综合加权评分法的优化

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摘要

Based on the gas-based direct reduction followed by melting separation process, the melting separation process of high chromium vanadium-bearing titanomagnetite metallized pellet and its optimization by multi-index synthetic weighted scoring method are studied in the present work. The optimal melting separation parameters include a melting temperature of 1 650℃, a melting time of 45 min, and a basicity of 1.10. Under these conditions, the recoveries of Fe, V, Cr, and TiO_2 reach 99.87%, 98.26%, 95.32%, and 95.04% respectively; the mass fraction of Fe, V, Cr, and TiO_2 are 94.16%, 0.94%, 0.76%, and 38.21% respectively. The basicity has the strongest effect and its effect on the melting separation kinetic is more significant than thermodynamic. As increased basicity from 0.6 to 1.1, the slag viscosity decreases and surface tension increases, which are both attributed to smooth melting separation and improved indexes. But further increasing basicity to 1.2, the amount of CaTiO_3 and slag melting point increase, and the slag amount is relatively excessive, then all the melting separation indexes decrease instead. The melting separation contains four key behaviors; Fe-C melt formation and Fe(l) generation; slag melting initiation and slag(l) generation; small iron droplets formation and start of iron-slag separation; continuous aggregation and growth of iron and accomplishment of iron-slag separation. The iron aggregation and growth should go through iron crystal nucleus formation, reaction interface formation and enlargement, and subsequent reaction interface decrease.
机译：在基于气体的直接还原再进行熔融分离的基础上，研究了高铬钒钛磁铁矿金属化球团的熔融分离工艺及其通过多指标综合加权评分法的优化。最佳的熔融分离参数包括熔融温度为1 650℃，熔融时间为45分钟和碱度为1.10。在此条件下，Fe，V，Cr和TiO_2的回收率分别达到99.87％，98.26％，95.32％和95.04％。 Fe，V，Cr和TiO_2的质量分数分别为94.16％，0.94％，0.76％和38.21％。碱度具有最强的作用，并且其对熔融分离动力学的影响比热力学更重要。当碱度从0.6增加到1.1时，炉渣粘度降低，表面张力增加，这两者均归因于平稳的熔融分离和改善的指标。但进一步提高碱度至1.2，CaTiO_3含量和炉渣熔点增加，炉渣量相对过多，则所有熔体分离指数均降低。熔融分离包含四个关键行为。 Fe-C熔体的形成和Fe（l）的产生；熔渣的引发和熔渣的产生；铁滴形成小，开始铁渣分离；铁的连续聚集和生长以及铁渣分离的完成。铁的聚集和生长应经历铁晶核的形成，反应界面的形成和扩大，随后的反应界面减少。

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  • 来源
    《ISIJ international》 |2017年第7期|1156-1165|共10页
  • 作者

    Jue TANG; Mansheng CHU; Cong FENG; Feng LI; Yating TANG; Zhenggen LIU;

  • 作者单位

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 China;

    Institute of Ferrous Metallurgy, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang, 110819 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

    high-chromium vanadium-bearing titanomagnetite; melting separation; recovery; optimization; multi-index synthetic weighted scoring method;

    机译：高铬钒钛磁铁矿;熔融分离复苏;优化;多指标综合加权评分法;

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