外加剂对可水合氧化铝水化行为的影响  

Effect of admixtures on hydration behavior of hydratable alumina

作　　者：王浩[1] 王周福[1] 刘浩[1] 王玺堂[1] 马妍[1] Wang Hao;Wang Zhoufu;Liu Hao;Wang Xitang;Ma Yan(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Scienceand Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《耐火材料》2020年第4期282-286,共5页Refractories

基　　金：国家自然科学基金项目(51672195,51474166);湖北省中央引导地方科技发展专项(2019ZYYD076)。

摘　　要：分别以柠檬酸、乳酸铝和硫酸铝为外加剂,配制可水合氧化铝料浆,并进行水化热测试和水化处理。对终止水化后的试样进行干燥处理,测试其质量变化率,分析其物相组成和显微结构,研究不同外加剂对可水合氧化铝水化行为的影响。结果表明:无外加剂的料浆水化75 h时水化累积放热量为85 J·g-1,水化24 h时水化质量增加率达11%,水化产物以薄片状拜耳石为主。引入外加剂的料浆水化累积放热量明显降低,水化质量增加率明显减小,水化产物以凝胶状勃姆石为主。乳酸铝对水合氧化铝水化行为和水化产物的影响更为明显。Hydratable alumina slurries were prepared with citric acid,aluminum lactate and aluminum sulfate as admixtures,respectively.The hydration heat test and the hydration treatment were carried out.After the hydration process of the slurries was terminated,the products were dried and their mass change rates were measured.The phase composition and microstructure of the hydration products were analyzed.The effect of different admixtures on the hydration behavior of the hydratable alumina was investigated.The results show that the cumulative heat of the hydratable alumina slurry without admixture hydrated for 75 h is 85 J·g-1,the mass gain after 24 h hydration is 11%and the main phase of the hydration products is flaky bayerite;while,the cumulative heat of the hydratable alumina slurry with admixtures and the mass gain are lower and the main phase of the hydration products is boehmite;and the effect of aluminum lactate on the hydration behavior and the hydration products of hydratable alumina is more obvious.

关 键 词：可水合氧化铝 水化热 勃姆石 拜耳石 

分 类 号：TQ424.27[化学工程]