大型高炉炉缸铁口直径及铁口深度的数值模拟  

NUMERICAL SIMULATION RESEARCH OF THE DIAMETER AND DEPTH OF THE TAPHOLE IN THE HEARTH OF LARGE BLAST FURNACE

作　　者：温玉莲[1] 刘朋波 陈艳波[1] 李宏伟[1] 郑朋超[1] 武建龙[1] 滕召杰 Wen Yulian;Liu Pengbo;Chen Yanbo;Li Hongwei;Zheng Pengchao;Wu Jianlong;Teng Zhaojie(Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063210,Hebei;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063210 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《河北冶金》2024年第7期21-27,37,共8页Hebei Metallurgy

摘　　要：高炉作为钢铁企业的主要设备之一,其使用寿命和工作状态在很大程度上影响了钢铁企业的经济效益及社会效益。面对新时期的“碳达峰、碳中和”新目标,高炉需要进一步向大型化、现代化、高效化、长寿化方向发展。目前国内多座大型高炉在炉役期内,炉缸都曾出现过较为严重的侵蚀现象,炉缸寿命成为限制大型高炉寿命进一步发展的限制性环节。调查结果显示,炉缸炭砖主要受铁水冲刷侵蚀、碱金属和锌对炭砖的破坏以及高温热应力的影响。针对铁水对炭砖的冲刷侵蚀,使用Fluent软件研究了5500 m^(3)高炉不同铁口直径及不同铁口深度对炉缸铁水流场及温度场的影响。研究结果表明,当铁口直径从55 mm增大到75 mm时,炉缸侧壁附近铁水流速和炭砖热面温度均会增加;当铁口深度从3.3 m增大到4.3 m时,炉缸侧壁附近铁水流速和炭砖热面温度均会降低。在高炉生产过程中,适当增加铁口深度及降低铁口直径有利于降低炉缸铁水流速和炭砖热面温度,从而延长高炉的使用寿命。As one of the main equipment of iron and steel enterprises,the service life and working condition of blast furnace greatly affect the economic and social benefits of iron and steel enterprises.Facing the goal of"carbon neutrality,emission peak"in the new era,the blast furnace needs to further realize large-scale,modern,efficient and longevity development.At present,many large blast furnaces in China have experienced serious erosion phenomenon during the service period,and the life of the hearth has become an important factor limiting the life of large blast furnaces.The investigation results show that the carbon bricks are mainly affected by hot metal erosion,alkali metal,zinc damage and high temperature thermal stress.In this paper the commercial software Fluent is used to study the influence of the taphole diameter and the taphole depth on the flow field and temperature field of hot metal in the hearth of a 5500 m^(3) blast furnace.The results show that when the taphole diameter increases from 55 mm to 65 mm,the velocity of hot metal near the sidewall of the hearth and the temperature of the carbon brick hot surface increase.When the taphole depth increases from^(3).3 m to 4.3 m,the velocity of hot metal near the sidewall of the hearth and the temperature of the carbon brick hot surface decrease.Increasing the taphole depth and decreasing the taphole diameter properly is beneficial to reducing the flow rate of molten iron in the hearth and prolonging the life of the blast furnace.

关 键 词：高炉 铁口 直径 深度 铁水流速 炭砖温度 

分 类 号：TF573.6[冶金工程—钢铁冶金]