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过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 785-790.DOI: 10.12034/j.issn.1009-606X.216361

• 过程与工艺 • 上一篇    下一篇

磷渣基地聚合物胶凝材料固化微细粒铁尾矿

和 森1, 罗钧耀1, 郑 森1, 黄 静1, 周新涛1,2, 夏举佩1, 罗中秋1*   

  1. 1. 昆明理工大学化学工程学院,云南 昆明 650500; 2. 昆明理工大学非常规冶金教育部重点实验室,云南 昆明 650093
  • 收稿日期:2016-11-28 修回日期:2017-01-26 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 罗中秋
  • 基金资助:
    有色冶金含砷废渣低温陶瓷固化机理研究

Immobilization of Microfine Grained Iron Ore Tailings Using Phosphorous Slag Based Geopolymer Materials

Sen HE1,  Junyao LUO1,  Sen ZHENG1,  Jing HUANG1,  Xintao ZHOU1,2,  Jupei XIA1,  Zhongqiu LUO1*   

  1. 1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 
    2. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan 650093, China
  • Received:2016-11-28 Revised:2017-01-26 Online:2017-08-20 Published:2017-08-16

摘要: 用磷渣基地聚合物胶凝材料对65%的微细粒铁尾矿浆体进行固化处理,考察了胶凝材料掺量对尾矿固化体各项力学性能的影响,分析了尾矿固化体的微观结构. 结果表明,尾矿固化体的力学性能受胶凝材料掺量影响显著,固化28 d后尾矿固化体的抗压强度在胶凝材料掺量为3%(?)时达0.2 MPa,掺量为14%(?)时大于3.0 MPa;不同胶凝材料掺量的尾矿固化体渗透系数均小于1?10?4 cm/s. 胶凝材料水化产生的水化凝胶可将尾矿中的各组分胶结在一起形成具有一定承载力和水稳性的硬化体,磷渣基地聚合物胶凝材料可作为尾矿固化的一种潜在固结剂.

关键词: 铁尾矿, 磷渣基地聚合物胶凝材料, 固化, 干堆

Abstract: A concentration of 65% microfine grained iron ore tailings was immobilized with phosphorous slag based geopolymer materials. The effect of phosphorous slag based geopolymer materials content on the mechanical property of the immobilized sample was determined. Moreover, the microstructure of immobilized sample was analyzed. The results showed that phosphorous slag based geopolymer material played a significant role in the mechanical properties of the immobilized samples. The compressive strength of the sample immobilization for 28 d was 0.2 MPa when addition of geopolymer material 3%(?) and over 3.0 MPa when addition of geopolymer material 14%(?). The permeability coefficient of immobilized samples with various geopolymer material contents was less than 1?10?4 cm/s. The hydration products gel of phosphorous slag based geopolymer materials can consolidate with ore tailings components to become a certain bearing capacity and water stabilization whole. The phosphorous slag based geopolymer materials may be considered as a potential material to immobilize microfine grained iron ore tailings.

Key words: Iron ore tailings, Phosphorous slag based geopolymer materials, Immobilization, Dry stacking