Investigation on the Profile of Softening-Melting Zone in the Dissected Blast Furnace

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  • 解体高炉における軟化融着帯形状の検討
  • カイタイ コウロ ニ オケル ナンカ ユウチャクタイ ケイジョウ ノ ケントウ

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Abstract

In order to clarify the function of softening-melting zone in a blast furnace, a mathematical model, by which the gas volume rate distribution through coke slits between softening-melting layers above “roots” can be calculated, is devised. Calculated results with Hirohata No. 1 blast furnace show that the greater part of bosh gas flow through the coke slits in lower softening-melting zone, and that the softening and melting-down volume of every softening-melting layer is proportional to the coke slit gas volume rate just under that layer.<BR>It is considered that the irregular shape of “root” softening-melting layers in Hirohata No. 1 blast furnace was mainly caused by the difference of blast volume rate at every tuyere.<BR>And also, from the relationship among the slit gas distribution, pressure drop and position of top softening-melting layer and inner or outer sides of softening-melting zone, which is calculated by the above mentioned mathematical model, a desirable profile of softening-melting zone is proposed.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 65 (10), 1526-1535, 1979

    The Iron and Steel Institute of Japan

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