摘要
根据Arrhenius＇formula和Gentling equation对反应速率常数k、反应活化能Ea等动力学参数进行模拟计算,研究以锡尾矿对熟料为原料烧制尾矿水泥熟料的形成动力学特性,并结合TG-DTA、XRD及SEM测试手段,分析其对熟料烧成性能、熟料物相组成及矿物形貌的影响,探求锡尾矿应用于生产水泥熟料的规律。研究表明：锡尾矿配料制备水泥熟料的反应动力学满足Arrhenius＇formula和Gentling equation,以锡尾矿为原料烧制水泥熟料的动力学控制机理与一般硅酸盐水泥熟料一致。锡尾矿配入可降低熟料矿物烧成温度及形成活化能Ea,提升固相反应速度,控制尾矿量在26%~30%时,Ea比一般硅酸盐水泥减小77.220~112.954 kJ·mol-1,且锡矿尾配入基本不改变热反应历程,可降低生料中碳酸盐分解温度、固相反应温度和烧成能耗。
The formation kinetics characteristics of used Tin tailings as cement raw material for calcining tailings cement clinker were investigated by analyzing some kinetic parameters, such as the reaction rate constant （k） and the activation energy （Ea ）. The kinetic parameters were calculated according to the Arrhenius＇ formula and Gentling equation. The impact on clinker burning performance, phase composition and Mineral morphology were analyzed by TG-DTA, XRD and SEM. The results showed that the formation kinetics characteristics of tailings cement clinker meet with the Arrhenius＇ formula and Gentling equation, the dynamic control mechanism was the same as the traditional Portland cement. The calcination temperature of clinker and Eo were decreased, the speed of the solid-phase reaction was increased by using Tin tailings as cement raw material. The Eo decreased from 77. 220 kJ · mol^-1 to 112. 954 kJ · mol^-1 compared with the traditional Portland cement when control the quantity of Tin tailings from 26% to 30%. Besides, the thermal process remained the same while the carbonate decomposition temperature, solid-phase reaction temperature and energy consumption were decreased.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第5期1052-1057,共6页
Bulletin of the Chinese Ceramic Society
基金
广西科学技术开发项目(桂科攻11107021-1-5)
广东石油化工学院引进人才项目(513035)
关键词
锡尾矿
水泥熟料
动力学
Tin tailings
cement clinker
kinetics
