低硅铁尾矿制备轻质陶粒试验研究  

Study on Preparation of Lightweight Ceramsite with High Blending Capacity using Low Silicon Iron Tailings

作　　者：李育彪[1,2] 潘梦真 蹇守卫 吕阳 陈坤 汤启宙 LI Yubiao;PAN Mengzhen;JIAN Shouwei;LV Yang;CHEN Kun;TANG Qizhou(School of Resources and Environmental Engineering,Wuhan University of Technology,Hubei,Wuhan 430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan University of Technology,Hubei,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan 430070,China;WISCO Resources Group Chengchao Mining Company Limited,Hubei,Ezhou 436000,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [3]硅酸盐建筑材料国家重点实验室,湖北武汉430070 [4]武钢资源集团程潮矿业有限公司,湖北鄂州436000

出　　处：《矿产保护与利用》2022年第6期73-80,共8页Conservation and Utilization of Mineral Resources

基　　金：湖北省重点研发计划项目(2020BCA077)。

摘　　要：为解决低硅铁尾矿大量堆存且利用难度大等问题,以杨家湾尾矿库低硅铁尾矿为主要原料,掺入了某铜尾矿和市售煤粉,通过烧结法制备轻质烧结陶粒,并考察了原料配比、水料比、尾矿粒度、烧结条件等因素对陶粒性能的影响。结果表明,质量配比为m(铁尾矿)∶m(铜尾矿)∶m(煤粉)=8∶1∶1(即铁尾矿掺量80%)、水料比1∶5、烧结温度1 120℃、烧结时间20 min的条件下制备出堆积密度为873.2 kg/m^(3)、筒压强度5.13 MPa、1 h吸水率为7.65%的轻质陶粒,结合陶粒形貌、物相及热重分析,陶粒烧结过程中产生了起增强强度作用且呈致密网状结构的透辉石。该研究为低硅铁尾矿的资源化利用提供了新的利用途径。In response to the challenges of large amount of low silicon iron tailings and great difficulty in utilization,light weight sintered ceramsite was prepared using the low silicon iron tailings from Yangjiawan tailings pond as the main raw material,which was combined with copper tailings and pulverized coal commercially available.The effects of ingredient ratio,mass ratio of water and material,particle size,sintering conditions and other factors on the properties of ceramsite were investigated in details.The results showed that the lightweight ceramsite possessed a bulk density of 873.2 kg/m^(3),cylinder pressure strength of 5.13 MPa and water absorption of 7.65%in 1 h,under the condition of a mass ratio of m(iron tailings)∶m(copper tailings)∶m(coal powder)=8∶1∶1(i.e.80%of iron tailings),water to material ratio of 1∶5,sintering temperature of 1120℃,and sintering time of 20 min.According to the morphology,phase and thermogravimetric analyses of ceramsite,diopside with dense network structure was formed and could improve the pressure of ceramsite during the sintering process.It therefore provides a novel way for the resource utilization of low silicon iron tailings.

关 键 词：低硅 铁尾矿 铜尾矿 高掺量 轻质陶粒 

分 类 号：TD926.4[矿业工程—选矿]