Al_(2)O_(3)-SiC-C质炮泥侵蚀过程热力学计算及抗渣性分析  

Thermodynamic calculation and slag resistance analysis of Al_(2)O_(3)-SiC-C taphole clay during corrosion

作　　者：鞠茂奇 肖扬武 夏昌勇 梁永和[2] 丛培源 魏建修 蔡玮 陈金凤 Ju Maoqi;Xiao Yangwu;Xia Changyong;Liang Yonghe;Cong Peiyuan;Wei Jianxiu;Cai Wei;Chen Jinfeng(Wuhan Research Institute of Metallurgy Construction Co.,Ltd.of MCC Group,Wuhan 430081,Hubei,China;不详)

机构地区：[1]中冶武汉冶金建筑材料研究院有限公司,湖北武汉430081 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [3]首钢水城钢铁(集团)有限责任公司,贵州六盘水553000

出　　处：《耐火材料》2024年第2期143-147,共5页Refractories

摘　　要：炮泥抗侵蚀性能不足会导致高炉出铁时间过短或炉前喷溅等问题,而炮泥所处不可视的“黑盒子”类服役环境,使得炮泥的侵蚀过程难以剖析。针对目前炮泥侵蚀过程模糊的问题,采用FactSage热力学软件计算了1450℃时熔渣对Al_(2)O_(3)-SiC-C质炮泥的侵蚀过程,并利用动态抗渣试验分析了熔渣对其侵蚀不同时间后(侵蚀时间分别为0、8、16、24和32 min)的侵蚀情况。结果表明:在渣对炮泥的侵蚀过程中首先形成钙长石侵蚀物相,继而在Al_(2)O_(3)饱和的液相析出Al_(2)O_(3),形成Al_(2)O_(3)隔离层,进一步侵蚀后炮泥和渣在侵蚀界面形成钙铝黄长石,最终形成的侵蚀物相均会完全向液相溶解;抗渣试验结果与热力学计算结果相符,渣对炮泥的侵蚀中生成的液相和低熔点物相降低了炮泥试样的临界强度,从而导致侵蚀速率加快,侵蚀时间为32 min时,炮泥试样被渣完全侵蚀破坏。Insufficient corrosion resistance of taphole clay leads to problems such as short tapping time or splashing during service,but the invisible service environment of taphole clay makes it difficult to analyze the corrosion process.Therefore,in response to this issue,the corrosion process of slag on Al_(2)O_(3)-SiC-C taphole clay at 1450℃was calculated using FactSage thermodynamic software,and the dynamic slag resistance test was used to analyze the corrosion of slag after different durations(0,8,16,24,and 32 min).The results show that in the process of slag corrosion,anorthite first forms,and then Al_(2)O_(3) precipitates from the Al_(2)O_(3) saturated liquid phase to generate an Al_(2)O_(3) isolation layer;gehlenite forms at the interface between the taphole clay and the slag during the further corrosion,and the final corrosion products completely melt into the liquid phase.The results of the corrosion test are consistent with the thermodynamic calculation.The liquid phase and low-melting point-phases generated during corrosion reduce the critical strength of the taphole clay,leading to accelerated corrosion.When the corrosion time is 32 min,the sample is completely corroded.

关 键 词：Al_(2)O_(3)-SiC-C 炮泥 热力学计算 动态抗渣试验 侵蚀 

分 类 号：TQ175[化学工程—硅酸盐工业]