萤石尾矿活性激发与水化性能分析  

Activity excitation and hydration performance analysis of fluorite tailings

作　　者：夏磊 张慧芳 张伟喜[4] 仇昊 高世伟 马军涛 XIA Lei;ZHANG Huifang;ZHANG Weixi;QIU Hao;GAO Shiwei;MA Juntao(He′nan Country&Town Layout Design Research Institute,Zhengzhou 450044,China;North China University of Water Resources and Electric Power School of Civil Engineering and Communication,Zhengzhou 450045,China;Zhongde Xinya Building Materials Co.,Ltd.,Zhengzhou 450100,China;Jiujiang Vocational University,Jiujiang Jiangxi 332000,China)

机构地区：[1]河南省城乡规划设计研究总院股份有限公司,郑州450044 [2]华北水利水电大学土木与交通学院,郑州450045 [3]中德新亚建筑材料有限公司,郑州450100 [4]九江职业大学,江西九江332000

出　　处：《有色金属（矿山部分）》2024年第5期193-197,205,共6页NONFERROUS METALS(Mining Section)

基　　金：河南省城乡规划设计研究总院科技研发项目(HNGH-KY-2021-0038)。

摘　　要：目的:以萤石尾矿资源化利用为目的,研究不同活性激发方法对萤石尾矿反应活性与水化性能的影响。方法:使用热处理、机械粉磨、联合激发三种方式对萤石尾矿进行活性激发,并将其作为掺合料用于制备水泥净浆,评价其反应活性和水化性能。结果:萤石尾矿在经过机械激发和碱热激发后,可表现出一定的反应活性,可观测出显著的无定形玻璃相,其作为掺合料制备水泥净浆的强度均提升了20%以上。结论:机械激发使比表面积增加,粒径减小,有利于萤石尾矿参与水化反应,产生微集料效应,起到填充作用,使掺入萤石尾矿的水泥净浆抗压强度提高。碱热激发萤石尾矿在水泥水化环境下具有水硬性。机械激发和碱热激发都能提高萤石尾矿的活性,使萤石尾矿具备激发后作为活性掺合料使用的可行性。意义:萤石尾矿作为萤石选矿的副产品,长期堆积易造成生态环境的破坏,亟需进行资源化利用。本文首次系统地评价了不同激发方式对萤石尾矿的激发效果,对萤石尾矿的资源化利用具有指导意义。Purpose:In this paper,the effects of different activation methods on the reactivity and hydration properties of fluorite tailings were studied for the purpose of resource utilization of fluorite tailings.Method:In this paper,three methods of heat treatment,mechanical grinding and combined excitation were used to stimulate the activity of fluorite tailings,and it was used as an admixture to prepare cement paste,and its reactivity and hydration properties were evaluated.Result:After mechanical excitation and alkali-thermal excitation,fluorite tailings can exhibit certain reactivity,and significant amorphous glass phase can be observed.The strength of cement paste prepared with fluorite tailings as admixture increased by more than 20%.Conclusion:Mechanical excitation increases the specific surface area and decreases the particle size,which is conducive to the participation of fluorite tailings in hydration reaction,produces the micro-aggregate effect,plays a filling role,and improves the compressive strength of cement paste mixed with fluorite tailings.The alkali-heat-activated fluorite tailings are hydraulically hard in the cement hydration environment.Both mechanical excitation and alkali thermal excitation can improve the activity of fluorite tailings and make fluorite tailings have feasibility of using as an active admixture after excitation.Significance:As a by-product of fluorite beneficiation,long-term accumulation of fluorite tailings will cause damage to the ecological environment,and it is urgent to carry out resource utilization.This paper systematically evaluates the excitation effect of different excitation methods on fluorite tailings for the first time,which has guiding significance for the resource utilization of fluorite tailings.

关 键 词：萤石尾矿 碱热激发 无定形玻璃相 矿物掺合料 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学] TD926.4[矿业工程—选矿]