高浓度全尾砂充填料浆流变特性试验研究  

Experimental Study on Rheological Properties of High-density Slurry of Full Tailings

作　　者：王富林 杨仕教[1] 苏帅 张志浩 WANG Fu-lin;YANG Shi-jiao;SU Shuai;ZHANG Zhi-hao(School of Resource & Environment and Safety Engineering,University of South China,Hengyang421001,China;Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization ofMineral Resources,Henan Polytechnic University,Jiaozuo454000,China)

机构地区：[1]南华大学资源环境与安全工程学院,湖南衡阳421001 [2]河南理工大学河南省矿产资源绿色高效开采与综合利用重点实验室,河南焦作454000

出　　处：《长江科学院院报》2019年第2期87-90,96,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(hunan-0008-2016AQ;hunan-0009-2016AQ);河南省矿产资源绿色高效开采与综合利用重点实验室开放基金项目(S201611);衡阳市科技计划项目(2016KS31);南华大学研究生科研创新项目(2017XCX01)

摘　　要：为探究某矿全尾砂充填料浆的流变特性,利用MCR52流变仪对不同浓度和灰砂比的全尾砂充填料浆进行流变参数测试,同时进行了扩展度测定。结果表明:对充填料浆流变特性的影响程度由大到小依次为质量浓度、灰砂比;料浆质量浓度相同时,屈服应力和平均黏度均随胶凝材料掺量的减小而减小,扩展度增大;料浆灰砂比相同时,屈服应力和平均黏度随料浆质量浓度增大而增大,扩展度减小;充填料浆浓度由76%增大至78%时,屈服应力、平均黏度陡增2～3倍,扩展度急剧减小,浓度低的充填料浆流动性能较好;全尾砂充填料浆具有"剪切变稀"的明显特征,扩展度可直观表征料浆的流动性能。With the full tailings of an ore as research object,the rheological parameters of the filling slurry with different concentrations and cement-sand ratios were measured by MCR52 rheometer,and the extensibility of slurry was also measured.Mass concentration of slurry has a largest impact on the rheological properties of slurry,followed by cement-sand ratio.At given mass concentration,the yield stress and average viscosity of slurry both declined whereas extensibility increased with the reduction of cementitious material content.At given cement-sand ratio,the yield stress and average viscosity enhanced whereas extensibility weakened with the increase of mass concentration.With the filling slurry concentration increasing from 76%to 78%,the yield stress and the average viscosity surged by two to three times and the extensibility abated sharply,which suggest that filling slurry of low concentration is of better fluidity.The filling slurry of full tailings has obvious characteristics of"shear thinning".The fluidity of slurry can be directly characterized by extensibility.

关 键 词：充填料浆 流变特性 屈服应力 黏度 扩展度 

分 类 号：TD853.34[矿业工程—金属矿开采]