摘要
针对某钒钛磁铁矿全尾砂充填料浆质量浓度波动大、充填成本较高、尾砂综合利用率不足且充填质量较差等问题,通过开展全尾砂胶结充填材料试验,对充填材料的物理化学性质进行了测定,并进一步研究了不同质量浓度和不同灰砂比条件下全尾砂的流动性和强度特性。结果表明:全尾砂化学成分安全,粒径-200目以下颗粒所占比例为46%,-20μm颗粒含量占比大于15%,可以形成“结构流”,适合用于井下充填;充填质量浓度为64%~74%,灰砂比为1∶4~1∶12时,料浆屈服应力小于100 Pa,管道流动阻力小于6.0 kPa/m,充填料浆流动性较好,输送性能较佳;为满足矿山安全开采28 d强度1 MPa的要求,且考虑充填成本,确定充填料浆最佳质量浓度为74%、灰砂比为1∶8。
Aiming at the problems of large fluctuation of slurry concentration,high filling cost,insufficient comprehensive utilization rate of tailings and poor filling quality of the full tailings filling material used in a vanadium titanium magnetite mine,the physical and chemical properties of the filling material were determined by the tests on the full tailings cemented filling material.The fluidity and strength characteristics of the full tailings under different concentrations and different cement-sand ratios were further studied and compared.The results are concluded as follows.The proportion of total tailings with particles size below-200 mesh is 46%,and the proportion of-20μm particles is greater than 15%.Thus,the structural flow can be formed,and the chemical composition is safe,which is suitable for underground filling.When the filling concentration is 64%~74%and the cement-sand ratio is 1∶4~1∶12,the yield stress of slurry is less than 100 Pa,the flow resistance of pipeline is less than 6.0 kPa/m,and the filling slurry has a good fluidity and good transportation performance.In order to meet the requirements of safety mining that 28 d strength should reach 1 MPa,considering the filling cost,the optimal mass concentration of filling slurry is 74%and the cement-sand ratio is 1∶8.
作者
王培强
朱艳艳
李新玉
祝鑫
彭亮
刘杨
WANG Peiqiang;ZHU Yanyan;LI Xinyu;ZHU Xin;PENG Liang;LIU Yang(Pingdingshan Polytechnic College,Pingdingshan,Henan 467001,China;Changsha Institute of Mining Research Co.,Ltd,,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology of Metal Mines,Changsha,Hunan 410012,China)
出处
《矿业研究与开发》
CAS
北大核心
2022年第7期35-39,共5页
Mining Research and Development
基金
河南省高等学校重点科研项目(21B440003)
“十三五”国家重点研发计划项目(2018YFC0604603,2018YFC0604606)。
关键词
充填料浆
流动性
结构流
输送阻力
Filling slurry
Fluidity
Structural flow
Transport resistance
