风冷高炉矿渣的超细粉磨与化学激发联合活化研究  

Study on combined activation of ultrafine grinding and chemical excitation of air-cooled blast furnace slag

作　　者：幸泽佳 张同生[1] 郭奕群[1] 刘少银 桑建明 任显凯 王磊 程龙 李茂辉[3] 李兆恒[4] XÌNG Zejia(School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]库尔勒鲁岳三川建材有限公司,新疆库尔勒841011 [3]北方民族大学材料科学与工程学院,宁夏银川750030 [4]广东省水利水电科学研究院,广东广州510635

出　　处：《水泥》2024年第8期27-33,37,共8页Cement

基　　金：国家自然科学基金委优秀青年基金(52122201);宁夏回族自治区重点研发计划项目(2022BDE02002);广州市科技计划项目(202201011493)。

摘　　要：风冷高炉矿渣水化活性低,某企业工业试验中使用风冷高炉矿渣作混合材生产复合水泥时,矿粉在水泥中的掺量通常低于30%。本文提出超细粉磨和化学激发联合活化的技术思路,改造粉磨工艺实现风冷高炉矿渣超细粉磨,并探究了粉磨工艺参数对矿粉粒径和活性指数的影响,当矿粉比表面积为650 m^(2)/kg时,28 d活性指数为88.4%,比原生矿粉提高了26.2%。在化学激发方面则研究了激发剂种类、掺量以及多元复配对矿粉活性的影响,最终以硫酸钠、硫酸铝钾和三乙醇胺为主要成分制备了一款复合激发剂,矿粉粉磨过程引入1.5%复合激发剂即可使7 d活性指数提高16.9%。The air-cooled blast furnace slag has low hydration activity.In the industrial trial of a cement production enterprise,air-cooled blast furnace slag was used as the mixing material to produce blended cement.It was found that the content of slag powder in cement is usually below 30%.This article proposed a technical approach of combined activation through ultrafine grinding and chemical stimulation.The grinding process was transformed to achieve ultrafine grinding of air-cooled blast furnace slag,and the effects of grinding process parameters on the particle size and activity index of slag powder were investigated.When the specific surface area of the slag powder was 650 m^(2)/kg,the 28d activity index reached 88.4%,which was 26.2%higher than the raw slag powder.Regarding chemical stimulation,the study examined the types and dosages of activators,as well as the effects of multicomponent compounding on the activity of slag powder.Ultimately,the composite activator was prepared with sodium sulfate,potassium aluminum sulfate and triethanolamine as the main components.The introduction of 1.5%composite activator during the mineral powder grinding process can increase the 7d activity index by 16.9%.

关 键 词：风冷高炉矿渣 超细粉磨 化学激发 联合活化 工艺改造 活性指数 

分 类 号：TQ172.44[化学工程—水泥工业]