废石−风砂高浓度料浆管道输送数值模拟及管输阻力新模型

为研究废石?风砂高浓度充填料浆自流输送管道输送特性,将矿山实际充填管路进行还原,应用FLUENT软件进行输送模拟研究。结果表明:充填料浆在管道的管径方向有明显的速度梯度;随料浆流速的增大,料浆的输送沿程阻力损失基本呈线性增大;质量浓度对管输阻力的影响非常大,在充填料浆质量浓度相差2%左右时,管道单位长度的阻力损失会相差20%~30%。通过对不同骨料比的充填料浆进行数值模拟,可知废石风砂质量比为6:4的浆体稳定性和流动性相对较好,更有利于管道输送。建立了管输阻力新模型,并通过工业试验对模型进行检验,验证了新的管输阻力模型的可靠性,研究结果为该矿选取充填系统的运行参数提供了重要依据。

Numerical simulation and new model of pipeline transportation resistance of waste rock-aeolian sand high concentration slurry

In order to investigate the transportation characteristics of waste rock-aeolian sand high concentration slurry for self flow pipeline filling,the actual filling pipeline in the mine was reduced,and the transportation simulation research was carried out with FLUENT software.The results show that there is an obvious velocity gradient in the direction of pipe diameter.With the increase of slurry velocity,the resistance loss of slurry transportation increases linearly.The slurry concentration has a great influence on the resistance of pipeline transportation.When the concentration difference of filling slurry is about 2%,the resistance loss per unit length of pipeline will vary by 20%?30%.Through the numerical simulation of the filling slurry with different aggregate ratio,the results show that the stability and fluidity of the slurry with waste rock-aeolian sand mass ratio of 6:4 are relatively better,which is more conducive to pipeline transportation.A new model of pipeline resistance was established,and the reliability of the new model was verified by industrial test.The results provide an important basis for selecting the operation parameters of the filling system.