Study on synthesizing mullite with bauxite tailing
-
摘要: 为使铝土矿尾矿得以高效利用,本研究以铝土矿尾矿为原料制备试样,将其置于钼丝炉中,分别在1550℃、1650 ℃保温4h合成莫来石。采用XRD、SEM和EDS等手段对不同温度下烧后试样的物相组成和显微结构进行表征;并借助TOPAS软件进行XRD全谱拟合无标样定量分析,确定莫来石的生成量。结果表明:利用铝土矿尾矿合成莫来石的纯度较高,晶粒发育良好,呈长柱状,互相交错。随着温度升高,莫来石生晶体轮廓更加清晰,其合成量略有增加。Abstract: To enhance the efficient utilization of bauxite tailings,the mullite was synthesized by bauxite tailings in molybdenum wire furnace at 1550 ℃ and 1650 ℃ for 4h.The sintered samples were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM) and energy dispersive spectrometry(EDS).The content of mullite was determined by TOPAS.The results indicated that the mullite was in high purity and well growth.The mullite was long column in morphology,alternating each other.As the temperature increased,the crystal profile of mullite was much more clear and the content of mullite increased slightly.
-
Key words:
- bauxite tailings /
- mullite /
- long columnar /
- quantitative analysis
-
[1] Ronan C,George M,Tom H.An evaluation of revegetation success on bauxite residue[J].Restoration Ecology,2009,17(3):350-358. [2] Gherardi M J,Rengel Z.Deep placement of manganese fertiliser improves sustainability of lucerne growing on bauxite residue:A glasshouse study[J].Plant & Soil,2003,257(1):85-95. [3] Kossoff D,Dubbin W E,Alfredsson M,et al.Mine tailings dams:characteristics,failure,environmental impacts,and remediation[J].Applied Geochemistry,2014,51(12):229-245. [4] Wehr J B,Fulton I,Menzies N W.Revegetation strategies for bauxite refinery residue:a case study of alcan gove in northern territory,Australia[J].Environmental Management,2006,37(3):297-306. [5] 梁倩,黄键,白鹏程.铝土矿选矿物料中常量及微量元素变化的探讨[J].轻金属,2008,29(4):8-10. [6] Liang Qian,Huan Jian,Bai Pengcheng.Study on the change of the constantand trace elements in bauxite dressing material[J].Light Metals,2008,29(4):8-10. [7] Shackelford J F,Doremus R H.Ceramic and glass materials : structure, properties and processing[M].New York:Springer,2008:38-48. [8] Schneider H,Fischer R X,Schreuer J.Mullite:Crystal structure and related properties[J].Journal of the American Ceramic Society,2015,98(10):2948-2967. [9] 王建立,王怀德,黄健.铝土矿选尾矿制备复合吸水材料的研究[J].轻金属,2004(3):7-9. [10] Wang Jianli,Wang Huaide,Huang Jian.Study of making absorption water compound materials with the gangue from bauxite benefication[J].Light Metals,2004(3):7-9. [11] 杨会智,陈昌平,孙洪巍,等.铝土矿尾矿微晶玻璃研制[J].矿业研究与开发,2007,27(6):48-49. [12] Yang Huizhi,Chen Changping,Sun Hongwei, et al.Study on preparation of glass-ceramics using bauxite tailings[J].Mining Research and Development,2007,27(6):48-49. [13] 兰叶,王毓华,胡业民.铝土矿浮选尾矿基本特性与再利用研究[J].轻金属,2006(10):9-12. [14] Lan Ye,Wang Yuhua,Hu Yemin.Study on the basic characteristics and the utilization of bauxite flotation tailings[J].Light Metals,2006(10):9-12. [15] 马冬阳.铝土矿尾矿制备莫来石基复相耐火材料[D].北京:北京科技大学,2015. [16] Davis R F,Pask J A.Diffusion and reaction studies in the system Al2O3-SiO2 [J].Journal of the American Ceramic Society,2006,55(10):525-531. [17] Yu P C,Tsai Y W,Yen F S,et al.Thermal reaction of cristobalite in Nano-SiO2/α-Al2O3 powder systems for mullite synthesis[J].Journal of the American Ceramic Society,2014,97(8):2431-2438. [18] 高振昕,刘百宽.中国铝土矿显微结构研究[M].北京:冶金工业出版社,2014:100-104. [19] 赵世柯,黄勇,黄校先,等.含Al2O3/SiO2体系反应烧结过程中莫来石的形成[J].陶瓷学报,2002,23(3):149-155. [20] Zhao Shike,Huang Yong,Huang Xiaoxian,et al.Mullite formation mechanisms in reaction-sintering of Al2O3/SiO2 containing mixed powders[J].Journal of Ceramics,2002,23(3):149-155.
点击查看大图
计量
- 文章访问数: 675
- HTML全文浏览量: 72
- PDF下载量: 282
- 被引次数: 0