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现代矿业 ›› 2025, Vol. 41 ›› Issue (05): 49-52,58.

• 采矿工程 • 上一篇    下一篇

河北某铁矿细粒级尾砂充填技术研究与应用

刘云龙1,2 刘娅彬1,2 李 林1,2 杨金光1,2 张义坤1,2 李彦科1,2   

  1. 1. 河北钢铁集团沙河中关铁矿有限公司;2. 河北省复杂铁矿低碳智能高效开采技术创新中心
  • 出版日期:2025-05-25 发布日期:2025-07-30

Research and Application of Fine-grained Tailings Filling Technology in an Iron Mine in Hebei Province

  1. 1. Shahe Zhongguan Iron Mine Co.,Ltd.,Hebei Iron and Steel Group;2. Hebei Province Complex Iron Mine Low Carbon Intelligent High Efficiency Mining Technology Innovation Center
  • Online:2025-05-25 Published:2025-07-30

摘要: 为解决中关铁矿充填过程中存在的细粒级尾砂充填浓度低、充填强度低等技术问题, 进行充填骨料物理化学性质研究、细粒级尾砂絮凝沉降试验研究、细粒级尾砂不同胶凝材料强度试 验研究、细粒级尾砂不同灰砂比强度试验研究,提出充填系统技术改造方案。最终现场结果表明,细 粒级尾砂灰砂比为 1∶5时,充填体 3 d单轴抗压强度≥1.0 MPa,7 d强度≥1.5 MPa,28 d强度≥2.5 MPa, 完全满足中关铁矿二步骤采矿需求,不仅解决了细粒级尾砂排放问题,减轻压滤车间压力,并且提高 了尾砂利用率。

关键词: 充填系统, 充填体强度, 细粒级尾砂

Abstract: In order to solve the related technical problems of low filling concentration and low filling strength of fine-grained tailings in the filling process of Zhongguan Iron Mine,the physical and chemical properties of filling aggregate,the flocculation sedimentation test of fine-grained tailings,the strength test of different cementitious materials of fine-grained tailings and the strength test of different cement-sand ra⁃ tio of fine-grained tailings are studied,and the technical transformation scheme of filling system is put for⁃ ward. The final field results show that when the fine-grained tailings cement-sand ratio is 1∶5,the 3 d uni⁃ axial compressive strength of the filling body is ≥ 1.0 MPa,the 7 d compressive strength is ≥ 1.5 MPa,and the 28 d compressive strength is ≥ 2.5 MPa,which fully meets the two-step mining demand of Zhongguan Iron Mine. It not only solves the problem of fine-grained tailings discharge,reduces the pressure of the filter press workshop,but also improves the utilization rate of tailings.

Key words: filling system, filling body strength, fine-grained tailings