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An investigation of the effect of particle size on the flow behavior of pulverized coal

机译：粒度对粉煤流动性能的研究

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In this paper, pulverized coal from industry was used as the experimental material and sieved into seven samples with different particle size. The effect of particle size on the flow properties of pulverized coal was investigated. An annular shear cell was used to measure angle of internal friction, angle of effective internal friction, cohesion and angle of wall friction, and a transparent Perspex hopper was used to determine the discharge characteristics of pulverized coal. The experimental results showed a significant effect of particles size on the cohesive and angle of wall friction rather than on the angle of internal friction. Jenike's procedure was used to predicate the flow pattern of pulverized coal with different particle size, which linked with the discharge experiment. Three regions including arching, unstable-flow and mass-flow were obtained based on the analysis of weighting curves and a progressive transition from blocking to unstable flow and to mass flow was observed as the particle size increased. In addition, the failure properties of pulverized coal was investigated which supported the region division. The investigation showed that the effect of particle size on the flow properties of pulverized coal is diversity and rheological test results can reflect flow properties of pulverized coal to some extent.
机译：本文中，来自工业的粉煤用作实验材料，并筛分成7个样品，具有不同的粒径。研究了粒度对粉煤煤流动性质的影响。使用环形剪切电池来测量内部摩擦的角度，有效内部摩擦角，壁摩擦的粘合和角度，并且使用透明的Perspex料斗来确定粉煤的放电特性。实验结果表明颗粒尺寸对壁摩擦的粘性和角度而不是内部摩擦角度的显着效果。 Jenike的程序用于使粉煤的流动模式与不同的粒径相连，与放电实验相连。基于对加权曲线的分析获得了包括拱形，不稳定流动和质量流量的三个区域，并且由于粒径增加，观察到从阻断到不稳定流动和质量流量的逐渐转变。此外，研究了粉煤煤的故障性质，支持该地区划分。研究表明，粒度对粉煤的流动性质的影响是多样性，流变测试结果可以在一定程度上反映粉煤的流动性能。

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