尖晶石加入量、水泥种类对刚玉-尖晶石浇注料高温抗折强度的影响  

Effects of spinel addition and cement variety on hot modulus of rupture of corundum- spinel castables

作　　者：张智慧[1] 徐海森[1] 阮国智[1] 朱其良 韩海东 

机构地区：[1]山东科技大学材料学院,山东青岛266590 [2]浙江锦诚耐火材料有限公司,浙江长兴313100 [3]潍坊华美精细技术陶瓷有限公司,山东潍坊261200

出　　处：《耐火材料》2013年第6期423-426,共4页Refractories

基　　金：国家自然科学基金项目(51202133);山东省中青年科学家科研奖励基金(BS2011CL030);山东省高等学校科技计划项目(J10LD21)

摘　　要：以板状刚玉、烧结尖晶石、氧化铝微粉和铝酸钙水泥为主要原料制备了铝酸钙水泥结合刚玉-尖晶石浇注料，研究了镁铝尖晶石加入量（质量分数分别为4％、7％、9％、11％、13％和15％）、铝酸钙水泥的类型（CA-270、CA-25R、CA-14M和Secar71）对刚玉-尖晶石浇注料高温抗折强度的影响。结果表明：刚玉-尖晶石浇注料具有良好的高温抗折强度，试样的高温抗折强度受CA6高温结舍相生成量、Al2O3固溶尖晶石的作用和原料带入的杂质高温下产生玻璃相共同作用的影响。在1500—1600℃范围内试样的高温抗折强度随着温度的升高而降低；在相同温度条件下，试样的高温抗折强度在尖晶石加入量为15％（W）时表现最好；不同种类水泥对试样高温抗折强度的影响主要表现为对高温结合物相CA6生成量的影响，同时水泥的细度和杂质含量对强度有明显影响，水泥越细，杂质越少，高温抗折强度越大。Calcium aluminate cement bonded corundum-spinel castables were prepared using tabular co- rundum, sintered spinel, alumina micropowder and calcium aluminate cement as main starting materials. Effects of spinel addition （4% ,7% ,9%, 11% ,13% ,and 15%, in mass,the same hereinafter） and cement variety （CA-270,CA-25R,CA-14M ,and Secar 7]） on hot modulus of rupture （HMOR） of corundum-spi- nel castables were investigated. The results show that the prepared corundum-spinel castables have high hot modulus of rupture;the HMOR is influenced by three factors：CA6 phase generation amount at high tem- peratures,solid solution between alumina and spinel, and the glass phase formed at high temperatures from the impurities introduced by starting materials;at ] 500 -] 600 ~C,the HMOR decreases with tempera- ture rising ;and at the same temperature,the HMOR is the highest when spinel addition is 15% ;the effect of cement variety on HMOR of corundum-spinel castables is mainly caused by the CA6 generation amount; meanwhile ,the fineness and impurity content have obvious influence on strength;the finer the cement, the fewer the impurity,and the higher the HMOR of corundum-spinel castable specimens.

关 键 词：镁铝尖晶石 铝酸钙水泥 刚玉一尖晶石浇注料 高温抗折强度 

分 类 号：TQ175[化学工程—硅酸盐工业]