利用铁尾矿制备微晶泡沫玻璃的热处理工艺研究  

Research on Heat Treatment Process of Foam Glass-ceramics From Iron Tailings

作　　者：孙强强 杨文凯 李兆 南宁 崔孝炜 SUN Qiangqiang;YANG Wenkai;LI Zhao;NAN Ning;CUI Xiaowei(School of Chemical Eengineering and Modern Materials,Shangluo 726000,Shaanxi,China;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo 726000,Shaanxi,China)

机构地区：[1]商洛学院化学工程与现代材料学院,陕西商洛726000 [2]陕西省尾矿资源综合利用重点试验室,陕西商洛726000

出　　处：《矿产保护与利用》2020年第3期69-74,共6页Conservation and Utilization of Mineral Resources

基　　金：陕西省教育厅重点科学研究项目(17JS036);陕西省科技厅联合基金项目(2019JLM-49);商洛市科技计划项目(SK2018-03-02);陕西省尾矿资源综合利用重点试验室开放基金(2017SKY-WK014)。

摘　　要：以商洛某尾矿库现存铁尾矿为主要原料,以废玻璃为增硅剂,CaCO3为发泡剂,TiO2和CaF2作为复合晶核剂,采用粉末法二次烧结法制备微晶泡沫玻璃,研究了发泡工艺和微晶化工艺对其抗压强度、密度以及热导率的影响。结果表明:在1350℃、保温2 h条件下获得了最佳熔制效果的基础玻璃;铁尾矿掺入质量分数为40%,在900℃时发泡30 min、1120℃微晶化处理2 h后,制得了孔径尺寸为1.6~2.0 mm、表观密度为1.679 g·cm^-3、抗压强度27.22 MPa、热导率为0.107 W·(m·K)^-1的微晶泡沫玻璃。The foam glass-ceramics were prepared by sintering method using the iron tailings from a tailings pond in Shangluo area as the main raw material,waste glass as silicatization agent,calcium carbonate as foaming agent,titanium dioxide and calcium fluoride as composite crystal nucleating agents.The effects of key parameters in foaming and microcrystallization process on its compressive strength,density and thermal conductivity were discussed.Results showed that when the content of iron tailings is 40%,foamed for 30 min at 900℃and then crystallized at 1150℃for 2 h,the high-strength foam glass ceramics was prepared with average pore diameter of 1.6~2.0 mm,the apparent density of 1.679 g·cm^-3,the compressive strength of 27.22 MPa and the thermal conductivity of 0.107 W/(m·k).

关 键 词：铁尾矿 微晶泡沫玻璃 抗压强度 热导率 

分 类 号：TD926.4.2[矿业工程—选矿]