脱硫灰/脱硫石膏作为水泥缓凝剂的水化行为  

Hydration Behavior of Clinker with Dry Flue Gas Desulfurization Byproduct and Desulfurization Gypsum

作　　者：苏清发 周勇敏[2] 陈永瑞 吴慕正 

机构地区：[1]福建龙净脱硫脱硝工程有限公司,福建龙岩364000 [2]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《硅酸盐学报》2016年第5期663-667,共5页Journal of The Chinese Ceramic Society

基　　金：国家"863"计划(2013AA065403)燃煤烟气循环流化床脱硫脱汞一体化及多污染物协同净化技术研究与示范;科技部国际合作资助项目(2010DFB93990)干法脱硫副产物资源化综合利用关键技术和核心设备的开发

摘　　要：研究了脱硫灰和脱硫石膏对熟料、纯相C_3A和C_4AF水化放热特性及水化产物矿物组成的影响。结果表明:水化过程中,脱硫灰和石膏均会与水泥的矿物成分作用形成钙矾石等,对水泥起到缓凝作用;同时,由于脱硫灰中半水亚硫酸钙的溶解速率低于石膏,使得脱硫灰与纯相作用时间延缓,并生成类水化硫铝酸钙和水铝钙石等,是脱硫灰具有更强缓凝作用的原因。Effects of dry flue gas desulfurization （FGD） byproduct and FGD gypsum as retarder on the hydration heat emission behavior and mineralogical formation of hydrated products in hydration of clinkers and pure minerals C3A and C4AF were evaluated. The result shows that dry FGD byproduct and FGD gypsum both have a retarding effect on the hydration of clinkers in the formation of ettringite. The slower solubility rate of calcium sulfite results in longer retards between dry FGD byproduct and pure phases since dry FGD byproduct has a more effective retarding effect rather than FGD gypsum.

关 键 词：脱硫灰 石膏 水化热 水化产物 

分 类 号：X705[环境科学与工程—环境工程]