Journal of Iron and Steel Research. 2014, (09) Core

Long Service Life and Heat Transfer Analysis of Hearth Bottom of New 4 350 m~3 Blast Furnace in TISCOChinese Full Text

HE Xiao-ping;LI Yang-long;WANG Hong-bin;CHENG Shu-sen;Ironmaking Plant,Taiyuan Iron and Steel(Group)Company Ltd.;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;

Abstract: In order to achieve the long service life of hearth bottom,some measures are taken including the design,material selection and masonry of hearth bottom based on the new BF with volume of 4 350m3 in TISCO.The"heat transfer method"hearth and"heat isolation method"bottom are utilized for the design.The method of gradient brick laying is applied for the whole hearth bottom.The carbon bricks with high thermal conductivity are chosen for the material selection.In order to decrease the thermal conductivity of filling between staves and carbon bricks,the hearth bricks touch with staves directly during the process of the masonry.The brickwork joints should be also controlled strictly.The segmented grouting is used between furnace shell and cooling staves.The heat transfer mathematical model of hearth bottom is established and the results show the excellent thermal performance of hearth bottom.The isotherm of 1 150℃is near the hot face of lining bricks which is favorable for the formation of slag-iron skull after blow-in.The temperature of carbon bricks is generally below 750℃and temperature gradient is also small.Therefore,the embrittlement and thermal stress damage of carbon bricks are little,which is the necessary condition for the long service life of hearth bottom.

Keywords：

blast furnace; hearth bottom; heat transfer; long service life;

DOI：
10.13228/j.boyuan.issn1001-0963.20130270
Series：
Subject：
Classification Code：
TF573

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Long Service Life and Heat Transfer Analysis of Hearth Bottom of New 4 350 m~3 Blast Furnace in TISCOChinese Full Text

HE Xiao-ping;LI Yang-long;WANG Hong-bin;CHENG Shu-sen;Ironmaking Plant,Taiyuan Iron and Steel(Group)Company Ltd.;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;

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