充填搅拌放料系统料位控制及稳态放料参数优化研究  

Research on Material Level Control and Steady State Material Discharging Parameter Optimization of Mixing and Discharging Filling System

作　　者：刘伟 任高峰[3] 江科 盛佳 朱豪 张聪瑞 刘奇 谭星宇 LIU Wei;REN Gaofeng;JIANG Ke;SHENG Jia;ZHU Hao;ZHANG Congrui;LIU Qi;TAN Xingyu(Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology of Metal Mine,Changsha,Hunan 410012,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《矿业研究与开发》2024年第6期142-148,共7页Mining Research and Development

基　　金：国家重点研发计划课题(2022YFC2904002,2022YFC2904003)。

摘　　要：充填搅拌设备料位控制是实现料浆均质化的关键,频繁的料位和流量波动对料浆质量及输送管网造成较大影响,最终导致充填质量下降和成本增高。为解决某矿山充填料位和放料流量难以控制的问题,通过构建理论计算模型,提出搅拌放料系统的压头损失计算公式,得到放料管管径D与出料口流速v成反比,屈服剪切应力与容重比值τ_(0)/γ、黏性系数η与容重γ比值(η/γ)跟搅拌桶料位H_(j)成正比。充填材料试验结果表明,随着料浆质量浓度C_(w)的增大,τ_(0)/γ、η/γ同样增大,有利于搅拌桶内料位的提升。以料浆质量浓度分别为74%、72%、70%、68%及放料管管径为140 mm、125 mm为变量,计算分析得出在C_(w)=74%、D=140 mm和C_(w)=72%、D=125 mm两种工况下,搅拌桶粒位分别为1.59 m、1.65 m,处于搅拌桶最佳运行料位范围。为进一步验证公式的合理性,以Space Claim软件构建搅拌放料系统模型,基于Fluent进行数值模拟分析,结果显示,放料管单位长度沿程压头损失及料浆出口流速模拟结果与理论计算值相对误差均在10%以内,研究表明所提出的搅拌放料系统的压头损失计算公式在优化料位控制和稳态放料方面具有良好的指导意义。The material level control of filling mixing equipment is the key to achieve the homogenization of slurry.Frequent fluctuations in material level and flow rate have a significant impact on the quality of the slurry and the transmission pipeline network,ultimately leading to a decrease in filling quality and an increase in cost.In order to solve the problem of difficulty in controlling the filling material level and discharging flow rate in a mine,a theoretical calculation model was constructed,and a formula for calculating the head loss of the mixing and discharging system was proposed.It is found that the diameter of the discharge pipe Dis inversely proportional to the flow velocity v at the discharge port,and the yield shear stress to bulk density ratioτ_(0)/γ,viscosity coefficientηto bulk densityγratio(η/γ)are directly proportional to the material level H_(j).The results of the filling material experiment indicate that as the slurry mass concentration C_(w)increases,τ_(0)/γ、η/γalso increase,which is beneficial for improving the material level in the mixing tank.Taking slurry mass concentrations of 74%,72%,70%,68%,and discharge pipe diameters of 140,125mm as variables,the calculation and analysis show that under two working conditions of C_(w)=74%,D=140mm and C_(w)=72%,D=125mm,the material level in mixing tank is 1.59mand 1.65m,respectively,which is within the optimal operating material level range of the mixing tank.

关 键 词：搅拌桶料位 充填料浆 料浆质量浓度 稳态放料 放料管道 数值模拟 

分 类 号：TD853.34[矿业工程—金属矿开采]