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A Simulation Study of Blast Furnace Hearth Drainage Using a Two-phase Flow Model of the Taphole

机译：利用出铁孔的两相流模型模拟高炉炉膛排水

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摘要

The drainage of the hearth plays an important role for the operation of the ironmaking blast furnace.An undisturbed extraction of the produced molten materials from the hearth is a prerequisite of a smooth operation of the high-temperature region, and a good mixing of liquid iron and slag in the taphole and runner helps desulfurize the iron.The flows of molten iron and slag in the blast furnace taphole have not received much attention, even though several investigators have studied the hearth drainage phenomena.In the present paper a two-fluid model of the taphole flow, based on an assumption of full stratification of the two liquids, is developed, and coupled with a simple material balance for the furnace hearth.Furthermore, the pressure loss of the liquids in the dead-man in front of the taphole inlet is considered.Simulations with the model are applied to illustrate how different factors affect the drainage, liquid levels and taphole flow.It is demonstrated that the in-fumace conditions play an important role for the flows and the flow distribution between iron and slag.The effects of key variables, such as coke-bed voidage and coke size, are illustrated and conclusions concerning their impact on the drainage are drawn.
机译：炉膛的排水对于炼铁高炉的运行起着重要作用。从炉膛中无扰动地抽出所产生的熔融物料是高温区域平稳运行以及铁水良好混合的前提高炉出铁口中的铁水和炉渣的流动并没有受到太多关注，尽管一些研究者已经研究了炉膛的排水现象。本文采用了一种双流体模型基于两种液体完全分层的假设，开发出了出铁口流的流量，并结合了炉膛的简单材料平衡。此外，出铁口前的死人中的液体压力损失考虑了进样口的影响，并用模型进行了模拟，以说明不同因素如何影响排水，液位和出铁孔流量。离子在铁水和炉渣之间的流动中起着重要作用。举例说明了焦炭床空隙率和焦炭尺寸等关键变量的影响，并得出了有关其对排水的影响的结论。

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  • 来源
    《ISIJ international》 |2011年第2期|p.228-235|共8页
  • 作者

    Lei SHAO; Henrik SAXEN;

  • 作者单位

    Thermal and Flow Engineering Laboratory, Abo Akademi University, Biskopsgatan 8, FI-20500 Abo, Finland.;

    Thermal and Flow Engineering Laboratory, Abo Akademi University, Biskopsgatan 8, FI-20500 Abo, Finland.;

  • 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

    taphole two-phase flow hearth drainage blast furnace;

    机译：出孔两相流炉底排水高炉;

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