超大能力超细全尾砂超长距离管道自流输送技术  

Self-flowing transportation of the large capacity super fine tailing slurry in overlength pipelines

作　　者：田明华[1,2] 王新民[1] 张国庆[1] 张钦礼[1] 李帅[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083 [2]铜陵化工新桥矿业有限公司,铜陵244000

出　　处：《科技导报》2015年第12期56-60,共5页Science & Technology Review

基　　金：国家科技支撑计划项目(2008BAB32B03)

摘　　要：为解决司家营铁矿超大能力超细全尾砂超长距离管道自流输送难题,在研究超细全尾砂管道自流输送、骨料颗粒沉降堵管及管道沿程阻力损失特性的基础上,利用Fluent软件对超细全尾砂超长距离大管径的自流输送特性进行分析。结果表明:超细粒径全尾砂易于悬浮,大管径输送可有效降低沿程阻力损失。工作流速为2.95 m·s-1、管道内径为155 mm的超细全尾砂浆体的垂直脉动速度分量Sv=0.24 cm·s-1远大于尾砂的干涉沉降速度0.034 cm·s-1,最大允许充填倍线Nmax高达10.6,充填料浆可均匀悬浮顺利自流至采空区。To solve the problem of poor self-flowing performance of the large capacity super fine tailing slurry in overlength pipeline transportation, this paper studies the self-flowing transportation, the hindered settling and the frictional resistance loss properties of the super fine tailing slurry. A pipeline model is built and the evaluation is made through the simulation software Fluent. It is revealed that the super fine tailings are easy to suspend and the large-tube pipeline transportation is beneficial to reducing the frictional resistance loss. With the working flow rate of 2.95 m· s -1, the pipeline＇s inner diameter of 155 ram, the vertical component of the fluctuating velocity reaches 0.24 m· s-1, which is far greater than the hindered settling rate of 0.034 m· s-1, and the maximum stowing gradient is up to 10.6.

关 键 词：超大能力充填系统 超细全尾砂 超长距离 自流输送 

分 类 号：TD853.34[矿业工程—金属矿开采]