期刊论文

Research on Mechanical Characteristics of the Activated Lithium Slag-based Cemented Material for Fine Tailings Backfill

中文

南华大学学报(自然科学版)

1673-0062

2022

36

01

32-38

10.19431/j.cnki.1673-0062.2022.01.005

湖南省教育厅科学研究重点项目（21A0264）;湖南省教育厅优秀青年项目（20B517）；

本校为第一机构

以江西某铅锌矿为例，探索活化锂渣作为细粒径全尾砂辅助胶凝材料的可行性。基于玻璃体结构理论，研究了NaOH化学改性和熔融-水淬作用对冶炼锂渣火山灰活性的影响，设计并开展了活化锂渣-全尾砂充填配比试验，测试了活化锂渣基全尾砂充填材料的7 d、28 d和56 d单轴抗压强度。结果表明，活化锂渣的化学成分以SiO2和Al2O3为主，具有较大的比表面积和较高的玻璃化程度；NaOH化学改性能够促进锂渣玻璃体中Q~4网状结构向聚合度更低的Q~2链状结构转化，有利于火山灰活性的提高；当灰砂比为1∶4和1∶6,质量浓度为66%、68%和70%时，各组活化锂渣-全尾砂充填体样品的28 d和56 d抗压强度可达到水泥-全尾砂...

The feasibility of activated lithium slag as cementitious material of fine tailings was explored by taking a lead-zinc mine in Jiangxi province as an example.Based on the theory of vitreous structure,the effects of NaOH modification and melt-quenching on pozzolanic activity of lithium slag were studied.The backfill experiments of activated lithium slag-fine tailings were carried out,and the 7,28 and 56 d uniaxial compressive strength(UCS)of the samples were tested.The results showed that the activated lithium slag was mainly composed of SiO2 an...