Recent loop testing performed at the GIW Hydraulic Lab (Furlan et al. 2013, 2014) has provided pump performance data for two highly non-Newtonian slurries of significantly different character: a high clay content slurry with minimal coarse solids; and a typical, low clay content, two component tailings slurry. The importance of air removal in the sump and pipe loop was demonstrated using a simple, yet novel de-aeration system. In addition to the measurement of performance losses, determination of the upper limit of "pumpability" for these slurries relative to their concentration and associated yield stress was investigated. However, once the slurry was de-aerated, no limits could be found, other than those dictated by suction side losses (NPSHA) or excessive pipeline friction gradients, indicating that the only true limit in practice is one of system economics, i.e. pump operating and capital cost. Experimentally measured pump head and efficiency were compared against corresponding predictions from two different models: the Walker and Goulas technique (Walker and Goulas, 1983), and the Graham et al. technique (Graham et al., 2009), with special focus given to the dependence of the losses on pump rotary speed.
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机译：GIW液压实验室最近进行的回路测试（Furlan等人，2013年，2014年）提供了两种特性明显不同的高度非牛顿泥浆的泵性能数据：高粘土含量的泥浆，具有最少的粗固体;以及典型的低粘土含量，两种成分的尾矿浆。使用简单但新颖的除气系统证明了在集水管和管道回路中去除空气的重要性。除了测量性能损失外，还研究了确定这些浆料相对于其浓度和相关屈服应力的“可泵性”上限。但是，一旦将浆液除气，除了吸力侧损失（NPSHA）或过多的管道摩擦梯度所规定的限制外，就找不到任何限制，这表明实际上唯一的真正限制是系统经济性之一，即泵的运行和资本成本。将实验测得的泵压头和效率与来自两种不同模型的相应预测值进行比较：Walker和Goulas技术（Walker和Goulas，1983年）和Graham等人。 （Graham et al。，2009），特别关注损失对泵转速的依赖性。
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