摘要
高炉铜冷却壁热面形成的渣皮是保障冷却壁寿命的关键。基于高炉中修,针对铜冷却壁热面的渣皮进行实地取样,通过化学成分分析、XRD分析以及SEM-EDS分析,并结合FactSage热力学计算及激光法导热分析,对大型高炉铜冷却壁表面形成渣皮的化学成分、微观形貌、高温性能和导热性能进行系统研究,探明了大型高炉铜冷却壁热面渣皮的物相组成和基础性能。结果表明,高炉铜冷却壁渣皮具有明显的分层结构,主要物相为二铝酸钙(CaAl4O7)、硅灰石(Ca2Al2SiO7)和钙长石(CaAl2Si2O8)等;通过FactSage软件计算渣皮熔化温度和黏度,发现沿着渣皮的生长方向,熔化温度降低,流动性降低;并通过传热计算得出合理渣皮厚度条件下的热流强度,从而为高炉生产实践提供理论指导。
The slag crust formed on the hot side of the blast furnace copper stave is the key to ensuring the campaign of the BF.The slag crust on the hot surface of the copper stave was sampled based on the BF mid-repair.The X ray fluorescence spectrometry,X-ray diffraction and scanning electron microscope coupled with an energy dispersive spectrometer,Factsage thermodynamic software and laser thermal conductivity analysis were performed to explore the chemical composition,microstructure,thermal conductivity and phase composition of the slag crust.The results show that the slag crust has a clear layered structure,and the main phases are grossite(CaAl4O7),gehlenite(Ca2Al2SiO7)and anorthite(CaAl2Si2O8).The melting temperature and the viscosity of the slag crust were calculated by Factsage software.It was found that along the growth direction of the slag crust,the melting temperature decreased and the fluidity deteriorated.The heat flow intensity of the slag crust under a reasonable thickness is calculated by the heat transfer method,which provides a theoretical guidance for the BF production practice.
作者
马恒保
焦克新
张建良
范筱玥
陈艳波
郑朋超
MA Heng-bao;JIAO Ke-xin;ZHANG Jian-liang;FAN Xiao-yue;CHEN Yan-bo;ZHENG Peng-chao(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Chemical Engineering,The U niversity of Queensland,StLucia,QLD 4072,Australia;Ironmaking Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第6期20-26,共7页
Iron and Steel
基金
国家青年科学基金资助项目(51704019)
关键词
大型高炉
铜冷却壁
渣皮
物相变化
熔化温度
large-size blast furnace
copper stave
slag crust
phase change
melting temperature
