用有色金属尾矿制备水泥的工艺条件  

Investigation of Technological Conditions of Cement Preparation from Nonferrous Tailings

作　　者：梁亮[1] 李凝[1,2] 韦立宁[2] 周龙萍[2] 

机构地区：[1]广东石油化工学院化工与环境工程学院,茂名广东525000 [2]桂林理工大学化生学院,桂林广西541004

出　　处：《矿产综合利用》2013年第4期75-78,共4页Multipurpose Utilization of Mineral Resources

基　　金：广西科学技术开发项目(桂科攻11107021-1-5)

摘　　要：本文将尾矿与水泥生料在不同比例及煅烧温度下制备了尾矿水泥熟料。利用XRD和X荧光检测技术对未煅烧的尾矿进行分析,得到尾矿的晶相结构和化学组成。在此基础上考察了不同煅烧温度下得到的尾矿的晶相结构变化;采用正交设计和单因素实验推荐了用尾矿为原料制备水泥熟料的工艺条件。研究结果表明:在不同温度条件下煅烧的尾矿相态发生相应改变,当煅烧温度达到850℃时生成硅酸盐,且随温度升高含量增多;结合正交设计及单因素实验中水泥标准稠度和凝结时间的评判标准,得出尾矿煅烧的最佳工艺条件为:尾矿和水泥生料配比为2∶1,煅烧温度为1200℃,煅烧时间为30min。Cement clinkers were obtained from tailings and cement raw with different blending ratio and calcination temperature. XRD and XRF were used to characterize the components of the tailings, structure and chemical composition of the tailings before and after calcination. Crystalline structure changes of tailings at different calcination temperatures were investigate. The orthogonal experiments and single factor experiments were used to explore the preparation conditions of cement clinker from tailings. The test results showed that the phase state of calcination rail- ings changes with the calcination temperature. Silicates began to appear when calcination temperature reach 850~C, and the silicate content increased with the increase of the temperatures, Using the normal consistency of the cement and coagulation time as evaluation standards, the optimum conditions are that the calcination temperature is 1200℃ ,the blending ratio between railings and raw cements is 2 ： 1 and calcination time is 0.5 h.

关 键 词：水泥 工艺 尾矿 煅烧温度 凝结时间 

分 类 号：TD952[矿业工程—选矿] X97[环境科学与工程—安全科学]