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
陈玉娥 1张佩雄 2左小坦 3赵立 3王恩会 2侯新梅2
作者信息
- 1. 北京科技大学碳中和研究院,北京 100083;芜湖新兴铸管有限责任公司,安徽芜湖 241000
- 2. 北京科技大学碳中和研究院,北京 100083
- 3. 芜湖新兴铸管有限责任公司,安徽芜湖 241000
- 折叠
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1 600℃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％.
Abstract
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(110-1 600 ℃)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 110-1 000 ℃ 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 1 600 ℃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Key words
steel ladle purging plug/corundum-spinel castable/calcium aluminate cement/high-temperature mod-ulus of rupture/thermal shock resistance引用本文复制引用
基金项目
国家自然科学基金资助项目(52025041)
国家自然科学基金资助项目(52174294)
出版年
2024
NETL
NSTL
万方数据