高浓度全尾砂料浆管道输送数值模拟研究

高浓度全尾砂胶结充填采矿法在地下黑色金属矿山中应用广泛,高浓度全尾砂胶结充填料浆管道输送技术是研究该采矿方法的重要内容。以吴庄铁矿高浓度全尾砂胶结充填开采为背景,根据该矿山需要达到的充填能力,选择内径为90 mm、113 mm和122 mm的充填管道,采用双精度流体力学软件fluent-2ddp研究高浓度全尾砂料浆在充填管道内的流动状态。根据矿体的赋存状态、矿山生产规模和充填料浆的性质,构建管道输送系统数值模型。设定管道入口和管壁的边界条件,进行料浆输送过程的数值解算,分析解算结果。研究结果表明,与90 mm和122 mm管道输送相比,113 mm管道输送料浆的压力损失和流速最合理;料浆在弯管内侧流速骤增,且显著大于外侧;料浆流速在管道断面上近似抛物线分布,最大流速位于管道中心的上方。

Numerical Simulation Study of High Density Total Tailings Slurry Pipeline Transport

Mining method of cement backfilling with high density total tailings slurry has being extensively used in underground iron mines.The pipeline transportation of high density total tailings cemented backfilling slurry is an important part in the study of this mining method.Taking the cement backfilling mining with high density total tailings in Wuzhuang iron mine as raw material,backfilling pipes with inside diameters of 90 mm,113 mm and 122 mm were respectively chosen to study its in-pipe flow states by adopting double precision fluid software fluent-2ddp.According to the occurrence of the ore,the production scale of the mine and the properties of backfilling slurry,a numerical model of pipeline transportation system is built.The boundary conditions of the inlet and pipe walls are set up to make numerical calculating of slurry transportation process.The analysis on the calculation results showed that the pressure lost and velocity are most suitable when the slurry was transported by 113 mm pipe,compared with by 90 mm and 122 mm pipes.The slurry velocity surges at the bends and the slurry velocity inside is higher than one outside.The slurry velocity at the section distributes like a parabola and the highest velocity located at above the pipe center.