水泥含量对轻烧刚玉-尖晶石质钢包透气砖性能和微观结构的影响  

Influence of calcium aluminate cement contents on properties and microstructure of light-fired corundum-spinel purging plugs

作　　者：陈玉娥 张佩雄 左小坦 赵立 王恩会 侯新梅[1] CHEN Yu′e;ZHANG Peixiong;ZUO Xiaotan;ZHAO Li;WANG Enhui;HOU Xinmei(Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China;Wuhu Xinxing Ductile Pipe Co.,Ltd.,Wuhu 241000,Anhui,China)

机构地区：[1]北京科技大学碳中和研究院,北京100083 [2]芜湖新兴铸管有限责任公司,安徽芜湖241000

出　　处：《钢铁研究学报》2024年第10期1352-1360,共9页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(52025041,52174294)。

摘　　要：铝酸钙水泥含量及热处理温度是影响轻烧透气砖中低温强度性能和抗热震性的2个主要因素。研究了热处理温度(110~1600℃)和水泥含量(1%~9%,质量分数)对刚玉-尖晶石质浇注料的显微结构、物相组成、抗折强度、耐压强度、高温抗折强度和抗热震性的影响。结果表明:随着水泥含量的增加,110~1000℃烧成试样的抗折强度和耐压强度增加;1400和1600℃烧成试样的抗折强度和耐压强度先增加后减小。当水泥质量分数为5%时,试样的抗折强度和耐压强度最高。经1600℃热处理后,随水泥加入量的增加,试样的高温抗折强度先增加后减小(质量分数为5%时最优),试样的抗热震性得到改善。当水泥质量分数为7%时,试样的抗热震性最优。因此,刚玉-尖晶石轻烧透气砖的适宜水泥加入质量分数为5%~7%。Calcium aluminate cement(CAC)contents and heat treatment temperature were the main factors affecting strength and thermal shock resistance(TSR)of light-fired steel ladle.The influence of heat treatment temperature(110-1600℃)and CAC contents(1 wt.%-9 wt.%)on microstructure,phase composition,cold modulus of rupture(CMOR),cold crushing strength(CCS),high-temperature modulus of rupture(HMOR)and TSR of corundum-spinel castable were comprehensively studied.The results show that the CMOR and CCS of samples fired at 110-1000℃increase with the increase in CAC contents,whereas the CMOR and CCS of samples fired at 1400℃and 1600℃increase and subsequently decrease.The obtained samples with 5 wt.%CAC content have the highest CMOR and CCS values.The HMOR of sample fired at 1600℃increases firstly and then decreases with the increase in CAC contents(the HMOR is the best at 5 wt.%).The sample with 7 wt.%CAC contents obtains the optimal TSR performance.Therefore,the appropriate CAC addition of corundum-spinel light-fired ladle purging plugs is 5-7 wt.%.

关 键 词：钢包透气砖 刚玉-尖晶石浇注料 铝酸盐水泥 高温抗折 抗热震性 

分 类 号：TF065.1[冶金工程—冶金物理化学]