利用石英尾矿制备高强轻集料试验研究  

Research on Preparation of High Strength Light Aggregate by Quartz Tailings

作　　者：张立 张朝宏 张晋 胡修权 尤大海 李国栋 彭兴华 Zhang Li;Zhang Chaohong;Zhang Jin;Hu Xiuquan;You Dahai;Li Guodong;Peng Xinghua(Yichang Key Laboratory of Comprehensive Utilization of Mineral Resources,Mineral Materials and Applied Engineering Technology Research Cen­ter of Hubei Province,Hubei Institute of Metallurgical Geology(Central South Institute of Metallurgical Geology),Yichang,Hubei 443003)

机构地区：[1]湖北冶金地质研究所(中南冶金地质研究所),湖北省矿物材料及应用工程技术研究中心,矿产资源综合利用宜昌市重点实验室,湖北宜昌443003

出　　处：《非金属矿》2022年第5期52-56,共5页Non-Metallic Mines

摘　　要：以石英尾矿为主要原料,粉煤灰为校正组分,制备高强陶粒,考察石英尾矿掺量及煅烧制度对陶粒表观密度、吸水率、颗粒强度的影响,并对烧成产物进行了X射线衍射(XRD)、扫描电子显微镜(SEM)分析。结果表明,随着石英尾矿掺量增加,陶粒表观密度与颗粒强度增大,吸水率整体呈下降趋势。当掺量为45%时,陶粒强度为719.0 N;继续增加掺量,各参数变化不明显;正交试验结果表明,煅烧温度对陶粒的表观密度、吸水率与颗粒强度影响最大;在预热温度为450℃,预热时间为20 min,煅烧温度为1150℃,煅烧时间为30 min,升温速率为10℃/min条件下,可制得堆密度为890 kg/m^(3),吸水率为10.5%,筒压强度为6.5 MPa的900级高强轻粗集料。To provide a scientific basis for the resource utilization of quartz tailings,the quartz tailings and fly ash were used as the main raw materials to prepare a high-strength ceramsite.The influence of dosage of quartz tailings and roasting system on the apparent density of ceramsite,water absorption and particle strength were investigated in the experiment,and the products were analyzed by X-ray diffraction(XRD)and scanning electron microscope(SEM).The results show that the apparent density and particle strength of ceramsite become larger and the water absorption rate decreases with the increasing dosage of quartz tailings.When the dosage of quartz tailings is 45%,the particle strength is 719.0 N.The changes in the parameters will not be obvious with the increase of the dosage of quartz tailings.The results of the orthogonal test show that the calcination temperature has the greatest influence on the apparent density,water absorption rate and particle strength of ceramsite.Under the conditions of preheating temperature of 450℃,preheating time of 20 min,sintering temperature of 1150℃,sintering time of 30 min,the 900-grade high strength light aggregate with a bulk density of 890 kg/m^(3),water absorption rate of 10.5%,and cylinder pressure strength of 6.5 MPa can be prepared.

关 键 词：石英尾矿 煅烧制度 表观密度 吸水率 筒压强度 

分 类 号：X75[环境科学与工程—环境工程]