铝酸盐水泥对硅溶胶结合刚玉质浇注料结构与性能的影响  

Effect of aluminate cement on structure and properties of silica sol bonded corundum castables

作　　者：丁宇航 刘会永[1] 丛培源[1] 蔡玮 项冰[1] 夏昌勇[1] Ding Yuhang;Liu Huiyong;Cong Peiyuan;Cai Wei;Xiang Bing;Xia Changyong(Wuhan Research Institute of Metallurgy Construction Co.,Ltd.of MCC Group,Wuhan 430081,Hubei,China;不详)

机构地区：[1]中冶武汉冶金建筑研究院有限公司,湖北武汉430081

出　　处：《耐火材料》2023年第6期523-527,共5页Refractories

摘　　要：结合铝酸盐水泥与硅溶胶各自的优势来改善浇注料的力学性能是一种既廉价又简便的优化策略。以棕刚玉、致密刚玉等为主要原料,硅溶胶和铝酸盐水泥为结合剂,制备了刚玉质浇注料,研究了铝酸盐水泥加入量(加入质量分数分别为0、1%、2%、3%和4%)对硅溶胶结合刚玉质浇注料的影响。结果表明,铝酸盐水泥水化促进了硅溶胶的凝聚缩合反应,同时形成Si—O—Ca、Si—O—Al化学键,加快形成稳定的三维网络结构。随着铝酸盐水泥加入量的增加,试样经110℃养护后的常温强度增大,经1 100、1 400℃热处理后的常温强度先升高后降低,经1 400℃热处理后的高温抗折强度迅速下降,热震后的常温抗折强度先升高后小幅下降,强度保持率则逐渐增加。添加1%(w)铝酸盐水泥的硅溶胶结合浇注料试样的综合性能最佳。Combining the advantages of aluminate cement and silica sol to improve the mechanical properties of castables is a cheap and simple optimization strategy.Corundum castables were prepared with brown corundum and dense corundum as the main raw materials,and silica sol and aluminate cement as the binders.The effect of the aluminate cement addition(0,1%,2%,3%and 4%,by mass,respectively)on the castables was studied.The results show that the hydration of aluminate cement promotes the coagulation and condensation reactions of silica sol,while Si—O—Ca and Si—O—Al chemical bonds are formed,which accelerates the formation of a stable three-dimensional network structure.With the increase of the aluminate cement addition,the cold strength of the samples after curing at 110℃increases,that after heat treatment at 1100 and 1400℃first increases and then decreases,the hot modulus of rupture after heat treatment at 1400℃decreases rapidly,the cold modulus of rupture after thermal shock first increases and then decreases slightly,and the strength retention ratio gradually increases.The silica sol bonded sample with 1%aluminate cement has the best comprehensive performance.

关 键 词：刚玉质浇注料 硅溶胶 铝酸盐水泥 结合剂 

分 类 号：TQ175[化学工程—硅酸盐工业]