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Scale Recycling Through Self-Reducing Briquettes to Use in EAF

机译：通过自还原型团块进行电炉鳞屑回收

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摘要

This work is part of a project which aimed to provide a theoretical and experimental basis for recycling of mill scale from mini-mill plants. The focus of the present study was to evaluate the kinetics and the mechanisms of reduction in self-reducing briquettes composed of scale, charcoal and binders, aiming its use in EAF. Such briquettes were submitted to the following tests: thermogravimetry in micro- and macro-thermobalances with analysis of the generated gas, evaluation of the temperature profile inside the briquette and the metallization degree obtained by tests carried out in muffle furnace at a high heating rate. Previous studies, concerning scale and charcoal taken together with the results of this work indicate that both, the kinetics of scale reduction and the heat transfer limit the overall reaction rate of the briquette. However, the relatively high metallization degree of 76% obtained in the high temperature tests indicates the interest in using such the briquettes for scale recycling in industrial plants. The risk of reoxidation is low due to the protective role of gas evolving from the briquette during self-reduction.
机译：这项工作是一个项目的一部分，旨在为小型工厂的工厂规模的回收利用提供理论和实验基础。本研究的重点是评估由水垢，木炭和粘合剂组成的自还原型煤的动力学及其还原机理，旨在将其用于电弧炉中。这些煤球要进行以下测试：在微热天平中进行热重分析，并对产生的气体进行分析，评估煤球内部的温度曲线，并通过在高马弗炉中在马弗炉中进行的测试获得的金属化程度。先前有关水垢和木炭的研究以及这项工作的结果表明，水垢还原的动力学和传热都限制了团块的总反应速率。然而，在高温测试中获得的相对较高的金属化度为76％，表明有兴趣将这种团块用于工业工厂的规模回收。由于在自还原过程中从团块中逸出的气体具有保护作用，因此再氧化的风险很低。

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  • 来源
    《ISIJ international》 |2017年第12期|2081-2090|共10页
  • 作者

    Mauricio Covcevich BAGATINI; Victor ZYMLA; Eduardo OSORIO; Antonio Cezar Faria VILELA;

  • 作者单位

    Laboratory of Metallurgical Processes of Federal University of Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, 31270-900 Brazil;

    Laboratory of Process Engineering and Materials, Ecole Centrale Paris, Grande Voie des Vignes, Chatenay-Malabry, 92290 France;

    Iron and Steelmaking Laboratory, Federal University of Rio Grande do Sul, PO Box 15021, Porto Alegre, RS, 91501-970 Brazil;

    Iron and Steelmaking Laboratory, Federal University of Rio Grande do Sul, PO Box 15021, Porto Alegre, RS, 91501-970 Brazil;

  • 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

    mill scale; charcoal; self-reduction; reoxidation; EAF;

    机译：轧机规模木炭;自我还原再氧化电炉;

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