鞍钢矿山全尾砂充填料浆输送特性L管试验研究

Rheological Properties of Filling Slurry in Pipeline Transportation for the Total Tailings Angang Mine

为了揭示鞍钢矿山全尾砂充填料浆的管道输送特性,基于流体力学中Bingham流体模型,结合鞍钢矿山充填系统,开展了L管充填料浆自流输送试验研究。通过胶砂比分别为1:6、1:8、1:10及质量浓度分别为66%、68%、70%、72%条件下的充填料浆管输特性的L管试验,分析了不同工况条件下的管道输送摩阻力试验数据。结果表明:料浆质量浓度比胶砂比对其屈服应力、黏率系数以及管输阻力影响显著;当料浆浓度达到70%和胶凝材料添加量为11%,管输阻力损失为7.02 k Pa/m,料浆自流输送的最大充填倍线为3.29。试验结果对鞍钢矿山的充填系统设计具有指导意义。

Based on the principle of Bingham fluids hydrodynamics, tests with gravity filling slurry flow of Angang Mine through an L-shaped pipe were carried out, so as to study the theological properties of filling slurry and the pipeline transportation ability. The experiments measured the rheological properties of filling slurry with cement-to-sand ratio of 1：6, 1：8, 1：10 and the concentration of 66%, 68%, 70%, and 72%. The results indicated that cement-to-sand ratio and concentration have greater influence on the yield stress, viscosity coefficient and the pipeline resistance than concentration. The better parameter for the Angang Mine is concentration 70%, binder consumption is 11%, stowing gradient 3.29 at most and pipeline resistance 7.02kPa/m. the research results not only provide basis for the design for filling system of Angang Mine, but also provide a reference for other Mine which has similar circumstances.