磷石膏与低品位矾土制备高贝利特-硫铝酸盐水泥  

Utilization of Phosphogypsum and Low Grade Bauxite for Belite Rich Calcium Sulphoaluminate Cement

作　　者：梁娇[1] 刘娜[1] 刘从振 郭清春[2] 李昕成[2] 钱觉时[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]云南省建筑科学研究院,云南昆明650223

出　　处：《非金属矿》2016年第4期17-20,共4页Non-Metallic Mines

基　　金：国家自然科学基金(U1202275);重庆市基础与前沿研究计划项目(cstc2013jj B50002);云南省建筑结构与新材料企业重点实验室2016年开放基金

摘　　要：利用磷石膏和低品位矾土制备高贝利特-硫铝酸盐水泥,研究了熟料的最佳煅烧工艺制度及配入过量磷石膏对水泥性能的影响。结果表明:在1300℃保温0.5 h,烧制出性能良好的高贝利特-硫铝酸盐水泥熟料,3 d和28 d水泥净浆抗压强度分别可达54.1 MPa和59.1 MPa;过量磷石膏形成的高温硬石膏能起到后掺石膏的作用,对水泥早期力学性能无不利影响。Belite rich calcium sulphoaluminate cement was prepared with phosphogypsum and low grade bauxite. The optimum burning process for the clinker production and the excessive amount of phosphogypsum in the clinker on the performance of the cement were investigated. The results demonstrate that belite rich calcium sulphoaluminate cement with excellent performances can be achieved. The compressive strength of the cement paste at 3 d and 28 d reaches 54.1 MPa and 59.1 MPa, separately. The excessive amount of phosphgypsum in the clinker turns into anhydrate, serving the added gypsum and satisfying the hydration of C4A3S. And the anhydrate does not harm the strength development of the cement paste.

关 键 词：磷石膏 低品位矾土 高贝利特-硫铝酸盐水泥 硬石膏 

分 类 号：TQ172.746[化学工程—水泥工业]