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首页> 外文会议>Iron ore 2011 >Improving the Fluxed Pellets Performance by Hydrated Lime Instead of Bentonite as Binder
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Improving the Fluxed Pellets Performance by Hydrated Lime Instead of Bentonite as Binder

机译：通过水合石灰代替膨润土作为粘结剂来改善助焊剂颗粒性能

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摘要

In this paper, the technology of producing fl uxed pellets by using hydrated lime as binder insteadrnof bentonite was carried out. The properties of the two types green balls (0.8 per cent bentonite andrn2.0 per cent hydrated lime) were as follows: drop numbers of 4.8 - 5.0 times/0.5 m, compressivernstrength of 19.7 - 24.2 N/pellet and thermal shock temperature of 280° - 385°, respectively, underrnthe same conditions of 1.5 per cent coke, 1.45 basicity and balling at 8.5 per cent moisture forrn13 min in disc pelletiser. Comparing with bentonite as binder, the compressive strength of fi redrnpellets with hydrated lime is elevated by 13.8 per cent and climbs up to 3113 N/pellet under thernfollowing conditions: preheating at 1050℃ for ten minutes and fi ring at 1300℃ for 15 min. Inrnthe mean time, the hydrated lime also improves the metallurgical performance of fi red pellets.rnThe reduction index was enhanced from 68.6 - 70.6 per cent, RDI_(+3.15) increased from 90.1 torn98.8 per cent and reduction swelling index dropped from 22.4 - 7.4 per cent, respectively. Thernmineral compositions and microstructure of fi red pellets shows that the fi red pellets containingrn2.0 per cent possess more calcium ferrite and magnesium ferrite and compact microstructure,rnleading to the higher compressive strength.
机译：本文研究了以熟石灰代替黏结膨润土生产流化粒料的工艺。两种类型的生球（0.8％的膨润土和2.0％的熟石灰）的性能如下：液滴数为4.8-5.0倍/0.5 m，抗压强度为19.7-24.2 N /粒，热冲击温度为280在圆盘造粒机中，分别在1.5％的焦炭，1.45的碱度和8.5％的水分的球化条件下，在13°-385°的相同条件下搅拌13分钟。与膨润土作为粘合剂相比，在以下条件下，熟石灰与熟石灰的抗压强度提高了13.8％，并攀升至3113 N /粒：在1050℃下预热10分钟，在1300℃下预烧15分钟。平均而言，熟石灰还改善了红色球团的冶金性能。还原指数从68.6-70.6％提高，RDI _（+ 3.15）从90.1提高到98.8％，还原溶胀指数从22.4-分别为7.4％。烧结球的矿物成分和显微组织表明，含量为2.0％的烧结球具有较多的铁素体钙和镁铁素体，并且组织致密，从而具有较高的抗压强度。

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  • 来源
    《Iron ore 2011》|2011年|p.509-512|共4页
  • 会议地点 Perth(AU)
  • 作者

    J Pan; D Q Zhu; M Emrich; T J Chun; H Chen;

  • 作者单位

    Central South University, HePing Building, Changsha Hunan 410083, PR China. Email: pjcsu@mail.csu.edu.cn;

    Central South University, HePing Building, Changsha Hunan 410083, PR China. Email: dqzhu@mail.csu.edu.cn;

    Vale, Brazil. Email: EmrichMarcus@126.com;

    Central South University, Central South University HePing Building, Changsha Hunan 410083, PR China. Email: springcsu@126.com;

    Vale, Shanghai Offi ce. Email: chenhong@126.com;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
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