不同耐火原料的耐碱腐蚀性能分析  

Anti-alkali corrosion properties of different refractory raw materials

作　　者：谢静[1] 顾华志[1] 段辉[1] 邵志君 李洪明 孙光思 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [2]宜兴市炉顶密封工程有限公司,江苏宜兴214225

出　　处：《武汉科技大学学报》2014年第6期428-431,共4页Journal of Wuhan University of Science and Technology

基　　金：国家973计划前期研究专项(2012CB722702);湖北省自然科学基金重点项目(2011CDA053)

摘　　要：采用快速圆片试验法,对白刚玉、板状刚玉、红柱石、CaAl4O7/MgAl2O4(CA2/MA)复相材料、富铝镁铝尖晶石AR90和AR78试样进行热力学分析和显微结构观察,研究其耐碱腐蚀性能。结果表明,AR90、AR78和CA2/MA与碱盐反应后生成了少量的低密度钾β-Al2O3(K2O·11Al2O3)和KMg2Al15O25,所引起的体积膨胀较小,线变化率满足耐碱腐蚀标准;板状刚玉、白刚玉和红柱石与碱盐反应后生成了大量的低密度化合物K2O·11Al2O3和KAlSiO4,所引起的体积膨胀较大,线变化率不满足耐碱腐蚀标准。T he anti‐alkali corrosion properties of w hite corundum , tabular corundum , andalusite , CaAl4O7/MgAl2Ol4 (CA2/MA) composites ,alumina enriched magnesia‐alumina spinel AR90 and AR78 were studied by thermodynamic analysis and microstructure observation .Results show that al‐kali salts react with AR90 ,AR78 ,CA2/MA ,respectively ,to form a small amount of low density po‐tassium β‐Al2 O3 (K2 O · 11Al2 O3 ) and KMg2 Al15 O25 ;the volume expansion of these refractory raw materials by these reactions is smaller and the linear change rate of the materials satifies the standard requirements of anti‐alkali corrosion .Alkali salts react with white corundum ,tabular corundum and andalusite ,respectively ,to form a large amount of low density K2 O · 11Al2 O3 and KAlSiO4 com‐pounds ;the volume expansion of these refractory raw materials by these reactions is larger and the linear change rate of the materials can not meet the standard requirements of anti‐alkali corrosion .

关 键 词：镁铝尖晶石 刚玉 红柱石 耐碱腐蚀性能 

分 类 号：TB333[一般工业技术—材料科学与工程]