School of Resource and Safety Engineering,Central South University
Ansteel Research Institute of Vanadium & Titanium,Pangang Group Research Institute Co. ,Ltd.
Design and Research Institute of Pangang Group Mining Co. ,Ltd.

为研究提钛炉渣替换水泥全尾砂胶结充填体的最佳配比及力学性能,以提钛炉渣(TBS)、铁基全尾砂(IFT)和水泥(P.O42.5R)为实验材料,在分析该提钛炉渣的粒径级配组成、成分等物理化学特性的基础上,制备灰砂比1∶4、1∶6、1∶8和提钛炉渣掺入替换比为40%、50%、60%、70%、80%的充填体试样,测定了养护龄期分别为7d、14d和28d时的充填体单轴抗压强度。实验结果表明:充填体的抗压强度与养护期龄正相关;相同养护时间下,充填体的单轴抗压强度随着灰砂比的增大而增大;随提钛炉渣替换比增大,充填体28d强度先增大后减小;当提钛炉渣替换比为50%时,灰砂比1∶8、1∶6、1∶4的充填体28d抗压强度分别为1.8MPa、2.5MPa、4.0MPa,均超过未添加提钛炉渣的试块强度,表明掺入提钛炉渣对充填体的28d强度具有明显的提升作用。研究结果表明,提钛炉渣可开发为矿山充填胶凝材料,从而降低矿山充填成本。

This study investigated the optimal ratio and mechanical properties of iron-based full tailingmeasured after curing for 7, 14, and 28 days. The experimental results demonstrated a positivecorrelation between the compressive strength of the filling and the curing time. Additionally,under thesame curing time,the uniaxial compressive strength of the filling increased with the increase of the sandcement ratio. With an increase in the replacement percentage of TBS,the strength of the filling initiallyincreased and then decreased at 28 days. Notably,when the TBS replacement ratio was 50% ,the compressive strength of the filling with ratios of 1 ∶ 8,1 ∶ 6,and 1 ∶ 4 after 28 days of curing was 1. 8 MPa,2. 5 MPa,and 4. 0 MPa,respectively. All of these values exceeded the strength of the specimens withoutTBS,indicating that the addition of TBS significantly improved the compressive strength of the filling at28 days. The research results demonstrate that TBS can be developed as a cementitious material formine backfill,thereby reducing the cost of mine filling.

“十三五”国家重点研发计划(2020YFC1909801);中南大学研究生自主探索创新(1053320214887)

李杰林,李奥,郝建璋,等 . 提钛炉渣-铁基全尾砂-水泥胶结充填体配比实验研究[J]. 矿业科学学报,2023,8(6):838-846. DOI:10. 19606 /j. cnki. jmst. 2023. 06. 010

Li Jielin,Li Ao,Hao Jianzhang,et al. Experimental study on the ratio between ti-bearing blast furnace slag-iron-based full tailing sand and cement incementitious filling[J]. Journal of Mining Science and Technology,2023,8(6):838-846. DOI:10. 19606 / j. cnki. jmst. 2023. 06. 010