MgO对熟料烧成及性能的影响机理  

Influence Mechanisms of Magnesium Oxide on Formation and Properties of Clinker

作　　者：任雪红 姚燕 张文生 叶家元 张洪滔 刘潭 REN Xuehong;YAO Yan;ZHANG Wensheng;YE Jiayuan;ZHANG Hongtao;LIU Tan(State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China)

机构地区：[1]中国建筑材料科学研究总院有限公司绿色建筑材料国家重点实验室

出　　处：《硅酸盐学报》2019年第8期1137-1142,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51872272,51672260)资助项目

摘　　要：采用化学试剂合成硅酸盐水泥熟料,应用X射线衍射结合Rietveld方法和差示扫描量热等,研究了MgO对熟料煅烧、矿物组成、阿利特晶型及熟料性能等的影响。结果表明:MgO在碳酸钙分解反应阶段已开始影响甚至参与了熟料烧成反应;MgO掺入使阿利特和铁铝酸四钙含量增多,贝利特和铝酸三钙含量相对降低;但当MgO掺量达到2%(固溶置换极限)及以上时,方镁石形成,熟料矿物组成基本不再变化;随着MgO的掺入,阿利特的晶型逐渐由M1型为主转变稳定为M3晶型。MgO掺量在1%附近时,靠近阿利特准同型相界处,熟料发展强度最高。The influence of magnesium oxide(Mg O) on the clinker formation, alite polymorphism and the hydration properties of clinker was investigated by X-ray powder diffraction with the Rietveld method and differential scanning calorimetry. The corresponding mechanisms were discussed. The results show that MgO begins to affect the burning process of clinker from the decomposition of calcium carbonate. The contents of alite and ferrite increase, but the contents of belite and tricalcium aluminate of the clinker decrease. When the content of MgO is above 2%(the solid solution limit of MgO in clinker), periclase will be formed, but the contents of the four major clinker phases are basically the same. M3 type alite can be stabilized with the incorporation of MgO. With 1% MgO, which is around amorphotropic phase boundary of alite for M1 to M3, the clinker has the maximum strength.

关 键 词：氧化镁 硅酸盐水泥熟料 阿利特:多晶态 固溶 抗压强度 准同型相界 

分 类 号：TQ172.11[化学工程—水泥工业]