阴离子掺杂对硅酸盐水泥熟料烧成的影响  

Effects of Anion Doping on Clinker Sintering of Silicate Cement

作　　者：龙志强[1] 王振林[1] 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2014年第8期44-49,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆理工大学实验技术开发基金资助项目(sk201003)

摘　　要：选用NaF,CaF2,CaSO4·2H2O,Ca3(PO4)24种化合物作为掺杂剂,研究阴离子掺杂对硅酸盐水泥熟料烧成的影响。通过X射线衍射分析、扫描电镜和甘油乙醇法分析了1 250℃和1 350℃下煅烧熟料的矿物组成、形貌以及游离氧化钙含量。结果表明:NaF,CaF2对生料易烧性有显著的促进作用,可以降低烧成温度约100℃,可作为有效改善熟料烧成的矿化剂,其中CaF2比NaF效果更为明显;Ca3(PO4)2在高温下能明显促进熟料矿物的形成,能形成大量C3S的最佳掺杂含量约1%;单独掺CaSO4对生料易烧性无明显作用,但可提高液相的生成量,降低液相粘度。Effects of anion doping on clinker sintering of silicate cement were investigated using NaF,CaF2,CaSO4·2H2O,Ca3（ PO4）2as compound dopants. The mineral phase structure,morphology and free lime content of clinker sintered at 1 250 ℃ and 1 350 ℃ were characterized by X-ray diffraction,scanning electron microscope and glycerin-ethanol method,respectively. The results show that NaF,CaF2 as effective mineralizers facilitating clinker sintering,especially for CaF2,can significantly improve the burnability of cement raw meal and decrease sintering temperature by about 100 ℃. Ca3（ PO4）2can evidently promote the formation of clinker minerals sintered at elevated temperature and its optimal doping content approximates 1%. Singly doping CaSO4 will give rise to liquid-phase yield and decrease its viscosity despite of the limited effects on burnability of cement raw meal.

关 键 词：硅酸盐水泥 熟料烧成 阴离子掺杂 矿化 易烧性 

分 类 号：TQ172.4[化学工程—水泥工业]