不同改性处理方法对磷石膏水泥调凝剂性能的影响  

The influence of different treatments of phosphogypsum used as cement retarder

作　　者：周丽娜[1] 周明凯[1] 赵青林[1] 李进辉[1] 

机构地区：[1]武汉理工大学材料科学与工程学院硅酸盐材料教育部重点实验室,湖北武汉430070

出　　处：《水泥》2007年第8期16-18,共3页Cement

基　　金：教育部科学技术研究项目(105125)

摘　　要：采用了3种不同的处理方法,包括水洗法、石灰中和法及石灰粉煤灰复合改性法来处理磷石膏,并对其配制的水泥进行了物理性能的检测。结果表明,水洗磷石膏做调凝剂其凝结时间长于掺天然石膏的水泥;石灰中和磷石膏与天然石膏的效果比较一致;石灰粉煤灰改性磷石膏可以有效固化或固结可溶磷和可溶氟,效果更明显,在代替天然石膏的同时,还可节省熟料。The three treatment processes, including washing with water, mixing with slaked lime and a combined treatment with lime and fly ash, were used to prepare purify phosphogypsum （PG）, and the physical property of cements prepared with each PG was tested. The results showed that the cement containing washed PG had longer setting time than the cement with natural gypsum （NG）, while PG mixed with slacked lime had the same effectiveness as NG. The treatment of combining PG with lime and fly ash could solidify soluble phosphates and soluble fluorines, and the application of this method could be satisfied to replace NG and save clinker.

关 键 词：磷石膏 处理方法 缓凝剂 

分 类 号：TQ172.44[化学工程—水泥工业] TQ172.462[化学工程—硅酸盐工业]