以低含硫量尾矿(含硫量约为0.49wt％)为主要成分,同时添加粘结剂(普通硅酸盐水泥)和絮凝剂(聚合氯化铝)制备尾矿膏体胶结充填料,并通过淋滤实验确定了粘结剂和絮凝剂配比.采用XRD、SEM-EDS、BET等分析方法,对膏体胶结充填料的微观结构和力学性能进行了深入研究.结果表明,絮凝剂的添加不仅大大地降低了粘结剂的添加量,而且改善了充填料的力学性能和耐水性.随着粘结剂和絮凝剂添加量的增加,尾矿膏体胶结充填料的比表面积逐渐增大,无侧限抗压强度也随之增大.养护龄期为28 d时,絮凝剂添加量为100 g/L的尾矿膏体胶结充填料的强度均达到2 MPa以上,能够达到满足矿山采空区回填要求.
参考文献
| [1] | 邵正明;刘东玲;李勇;纪宪坤.尾矿综合处理与利用技术现状及展望[J].现代矿业,2014(9):166-167,174. |
| [2] | Mamadou Fall;Mukesh Pokharel.Coupled effects of sulphate and temperature on the strength development of cemented tailings backfills: Portland cement-paste backfill[J].Cement & concrete composites,201010(10):819-828. |
| [3] | M. Fall;S.S. Samb.Effect of high temperature on strength and microstructural properties of cemented paste backfill[J].Fire safety journal: An international journal devoted to research on fire safety science and engineering,20094(4):642-651. |
| [4] | Ercikdi, B.;Baki, H.;Izki, M..Effect of desliming of sulphide-rich mill tailings on the long-term strength of cemented paste backfill.[J].Journal of Environmental Management,2013:5-13. |
| [5] | Alireza Ghirian;Mamadou Fall.Coupled thermo-hydro-mechanical-chemical behaviour of cemented paste backfill in column experiments. Part I: Physical, hydraulic and thermal processes and characteristics[J].Engineering Geology,2013:195-207. |
| [6] | 赤泥膏体和似膏体全尾砂胶结充填料研究[J].矿业研究与开发,2011(4):17-21. |
| [7] | 韩斌;吴爱样;王贻明;王洪江;王少勇;江怀春.低强度粗骨料超细全尾砂自流胶结充填配合比优化及应用[J].中南大学学报（自然科学版）,2012(6):2357-2362. |
| [8] | 叶家元;张文生;史迪;王宏霞;汪智勇.低温养护及加水方式对碱激发铝土矿选尾矿砂浆强度的影响[J].硅酸盐通报,2013(4):537-541. |
| [9] | Mostafa Benzaazoua;Tikou Belem;Bruno Bussiere.Chemical factors that influence the performance of mine sulphidic paste backfill[J].Cement and Concrete Research,20027(7):1133-1144. |
| [10] | M. Fal;D. Adrien;J.C. Celestin.Saturated hydraulic conductivity of cemented paste backfill[J].Minerals Engineering,200915(15):1307-1317. |
| [11] | SamuelCoussy;Mostafa Benzaazoua;Denise Blanc;PierreMoszkowicz;Bruno Bussiére.Arsenic stability in arsenopyrite-rich cemented paste backfills:A leaching test-based assessment[J].Journal of hazardous materials,20112/3(2/3):1467-1476. |
| [12] | 张鑫 .安徽铜陵矿区重金属元素释放迁移地球化学特征及其环境效应研究[D].合肥工业大学,2005. |
| [13] | M. Benzaazoua;M. Fall;T. Belem.A contribution to understanding the hardening process of cemented pastefill[J].Minerals Engineering,20042(2):141-152. |
| [14] | Mostafa Benzaazoua;Jean-Frangois Fiset;Bruno Bussiere.Sludge recycling within cemented paste backfill: Study of the mechanical and leachability properties[J].Minerals Engineering,20065(5):420-432. |
| [15] | M. Benzaazoua;P. Marion;I. Picquet.The use of pastefill as a solidification and stabilization process for the control of acid mine drainage[J].Minerals Engineering,20042(2):233-243. |
| [16] | Alireza Ghirian;Mamadou Fall.Coupled thermo-hydro-mechanical-chemlcal behaviour of cemented paste backfill in column experiments Part II: Mechanical, chemical and microstructural processes and characteristics[J].Engineering Geology,2014:11-23. |
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