基于PHREEQC模型的水泥熟料矿物溶解动力学研究  

Dissolution Kinetics of Cement Clinker Minerals Based on PHREEQC Model

作　　者：陈雷[1] 崔卫平[1] 段平[2] 陈伟[2] 

机构地区：[1]唐山曹妃甸发展投资集团有限公司,唐山063200 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2013年第12期6-10,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51272194);湖北省自然科学基金(2012FFB05102)

摘　　要：在地球化学反应平衡模拟理论基础上,建立了矿物溶解模型,选用美国地质调查局(USCS)提供的PHREEQC模拟软件,研究了不同条件下,各种离子、pH、温度、离子强度等条件对矿物溶解作用的影响。模拟结果表明:Na+、Cl-、K+对熟料的影响不显著,Mg2+、SO42-、Ca2+对它们的溶解平衡影响显著;对C3S,C2S而言,随着钠离子的增多,熟料矿物的溶蚀将加速;加入石膏使熟料矿物的饱和指数增大,而C3A饱和指数下降;随着温度的升高,熟料矿物平衡常数增大,饱和指数均减小;随着pH的升高,熟料矿物的饱和指数升高。Dissolution model of cement clinker minerals was set up based on simulation theory of geochemical reaction equilibrium, PHREEQC simulation software provided by United States Geological Survey （USGS） was employed to in-vestigate effects of various ions, pH, temperature, ionic strength on dissolution of minerals. The results show that the temperature, pH, ionic strength, common-ion effect and varied ions have significant effects on dissolution equilibrium of the minerals. Specifically, Na^＋ , C1^- and K^＋ present little effects on clinker minerals, however, Mg^2＋ , SO4^2- and Ca^2＋ have significant effects on dissolution equilibrium of the minerals. Dissolution of C3S and C2S accelerated with increasing 4 Na . Gypsum contributes to the increase of SI of clinker minerals except for C3 A. Equilibrium constant increases and SI decreases with increasing temperature. Equilibrium constant and SI decrease with increasing pH.

关 键 词：地球化学 水泥矿物 饱和指数 溶解 

分 类 号：TU528[建筑科学—建筑技术科学]