摘要
针对江西某金矿充填倍线大,难以自流输送的问题,通过充填料浆管道输送水力学计算,并结合矿山充填工艺参数,确定了不同充填料浆状态下的管道沿程阻力损失;对比分析了不同的充填料浆管道输送系统布置方案,确定了最佳的管道输送方案;推荐了最佳的充填料浆管道输送工作流速、充填料浆参数及管道参数;最终通过综合分析,选取了充填加压泵类型及相关技术参数。经现场工业应用,取得较为理想的充填效果。
The maximum filling geometrical line of the system above + 0 m middle section in a gold mine in Jiangxi was close to 40,and it was difficult to realize the self-flowing of the filling slurry,and there were a large number of recoverable resources in this area. In view of the above problem it was proposed to use the large line pressure filling technology to achieve filling of +0 m middle section of the mine,so that the above resources could be recovered.In order to determine the optimal process parameters of the filling slurry pipeline,this paper firstly analyzed the basic properties of the tailings,the main chemical composition of the graded tailings was SiO2 and Al2O3.This component was beneficial to increase the strength of filling body.The physical properties of the graded tailings was 2.74,the bulk density was 1.45 t/m3,and the porosity of the loose tailings was 47.1%.The particle size composition test results show that - 37 μm only accounts for 5.62%,and - 74 μm accounts for 14.36%, indicating that the fractionated tailings has less fine particles,the whole grain large diameter is an ideal filling aggregate,and selected the corresponding hydraulic model for pipeline transportation.Through the hydraulic calculation of the filling slurry pipeline,the critical flow velocity under different conveying conditions was determined.Combined with the mining filling process parameters,the resistance loss along the pipeline under different filling conditions was calculated.According to the existing engineering conditions of the mine and the scope of filling services,two sets of pipeline transportation system layout schemes were designed.Scheme 1:The longest filling pipeline in the middle section of 100 m was 1 728 m,the geometric filling line was 42.1,the conveying resistance was 2.84 MPa(concentration was 68%,the diameter was 100 mm). The longest filling pipeline in the middle section of 75 m was 1 956 m,the geometric filling line was 29.6,the conveying resistance was 2.88 MPa.The longest filling line in the middle sec
作者
杨超
郭利杰
王劼
史采星
许文远
YANG Chao;GUO Lijie;WANG Jie;SHI Caixing;XU Wenyuan(Beijing General Research Institute of Mining and Metallurgy Technology Group,Beijing 100260,China;National Center for International Joint Research on Green Metal Mining(NCGMM),Beijing 100260,China;Shandong University of Technology,Zibo 255000,Shandong,China)
出处
《黄金科学技术》
CSCD
2019年第1期89-96,共8页
Gold Science and Technology
基金
国家重点研发计划"深部金属矿高效协同膏体充填技术"(编号:2017YFC0602903)和"基于有色冶炼渣的绿色充填胶凝材料制备及其性能合作研究"(编号:2017YFE0107000)联合资助
关键词
大倍线
加压充填
矿山充填
管道输送
输送阻力
临界流速
large fill-times-line
pressure filling
minefill
pipeline transportation
transport resistance
critical velocity
