摘要
有色金属矿山上使用的全尾砂充填料是一种特高浓度的浆体,重量浓度一般都在75％以上.如果以管道输送,则形成比栓半径很大的栓塞流,管道的压能主要是克服管壁处浆体的剪切力,因此浆体粘性越大,输送能耗越高. 本实验研究采用在管壁处高剪切区,注入少许水,形成液环输送,使浆体的栓塞沿管壁滑移,以低粘流体的剪切变形代替高粘浆体的剪切变形,达到减阻目的.论文既从理论上分析了充水减阻的极值,亦通过初步实验验证了同流量减阻可达20％以上.本实验研究对全尾砂充填法的推广具有重要意义.
The slurry of tailing sand produced by mining of non-ferrous metals has hyperconcentration in weight generally over 75%. If it is transported by pipeline, the embolus fluid along the perimeter is formed. The pressure energy is mainly used to overcome the shear stress of slurry near the conduit wall. So the larger the viscosity of slurry is, the higher the energy dissipation is.In the experimental study, a little amount of water with low viscosity is poured into the area near conduit wall with high shear stress to form the transport with a water ring. In this way, the embolus of slurry slides along the conduit wall with the shear deformation of the fluid with low viscosity instead of tho slurry with high viscosity to reduce the resistance. The maximum reducing resistance can be attained as high as 20% with same discharge.
出处
《泥沙研究》
CSCD
北大核心
1990年第2期23-30,共8页
Journal of Sediment Research
基金
国家自然科学基金
