泵送膏体触变特性对管道阻力的影响

发布时间：2019-06-11 05:26

【摘要】：触变性是膏体复杂的流变特性,直接影响膏体料浆的管道输送阻力,主要与流动速度、流动时间和浆体静置时间相关。为研究某铜矿全尾膏体料浆在长距离泵送过程中的触变特性,本文通过设计开展环管模拟试验、流变理论分析,研究了流动速度、流动时间、停泵时间等触变性影响指标对膏体输送阻力损失的影响规律。结果表明:阻力损失与流动时间成反比并最终趋于稳定,达到稳定状态的时间与浆体流量成反比;在低流速时,阻力损失与流速成正比,并随着流速的增大逐渐趋于线性增长;重启时的出口压力与停泵时间成正比,且停泵时间不宜超过4h,以免造成堵管。研究成果对泵送膏体的工业应用具有一定的指导作用。
[Abstract]:Thixotropy is a complex Rheological property of paste, which directly affects the pipeline transportation resistance of paste slurry, which is mainly related to flow velocity, flow time and slurry static time. In order to study the thixotropic characteristics of whole tailings slurry in a copper mine during long distance pumping, the flow velocity and flow time were studied by designing and carrying out ring pipe simulation test and flow theory analysis. The influence of thixotropy index such as pump shutdown time on the loss of paste transportation resistance. The results show that the resistance loss is inversely proportional to the flow time and finally tends to be stable, and the time to reach a stable state is inversely proportional to the slurry flow rate, and the resistance loss is proportional to the flow rate at low velocity, and tends to increase linearly with the increase of flow rate. The outlet pressure is proportional to the pump shutdown time, and the pump shutdown time should not exceed 4 hours, so as not to cause pipe blockage. The research results have certain guiding effect on the industrial application of pumping paste.
【作者单位】：中南大学资源与安全工程学院;飞翼股份有限公司;
【分类号】：TD853.34

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