基于环管试验的粗骨料膏体管输阻力模型及优化

来源:用户上传      作者:杨晓炳 闫泽鹏 尹升华 杨航

　　摘 要：樘矫鞔止橇细嗵宓墓苁渥枇μ匦裕开展了关于粗骨料膏体输送特性的工业级 环管输送试验，利用白金汉方程对环管数据拟合处理后获得膏体的实际流变参数，并建立了基于流动度测试的粗骨料膏体阻力方程.通过响应面分析法（RSM-BBD）对膏体输送行为进行分析，分别得到单因素和多因素耦合对阻力损失的影响规律，并优化了粗骨料膏体的管道 输送参数.结果表明：流变测试得到的流变参数普遍大于环管拟合参数，其中屈服应力相差10.4%～12.2%、塑性黏度相差 21%～32.8%.通过响应面分析得到了单因素对阻力损失影响的敏 感程度为质量分数>管径>流量，并发现因素间的交互作用影响显著，其中质量分数和管径的交互影响起到决定性作用.以金川实际充填需求为背景采用响应面优化后的输送参数为：管 径 220mm、流量142.4 m3/h、质量分数73.2%.研究成果可为粗骨料膏体充填系统运行参数的选 取提供参考.
　　关键词：粗骨料膏体;管输阻力;环管试验;流变特性;响应面分析
　　中图分类号：TD862.2 文献标志码：A
　　Transportation Pressure Model and Optimization of Coarse Aggregate Paste Backfill Based on Pipe Loop Test
　　YANG Xiaobing1，2，3，YAN Zepeng1，3?，YIN Shenghua1，3，YANG Hang2
　　（1.School of Civil and Resources Engineering，University of Science and Technology Beijing，Beijing100083，China;
　　2.State Key Laboratory of Mineral Processing，Beijing102628，China;
　　3.Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education（University of Science and Technology Beijing），Beijing100083，China）
　　Abstract：To determine the pipe pressure drop characteristics in the coarse aggregate paste backfill（CPB）pro-cess.An industrial-scale loop test on the transportation characteristics of CPB was carried out.The actual rheological parameters of CPB are obtained by fitting the Buckingham equation to the loop test data，and the resistance equationwas established based on the fluidity test.The response surface method（RSM-BBD）was used to analyze the trans-portation behavior of the CPB，and the effects of single-factor and multi-factor coupling on the pressure loss were ob-tained，respectively.Finally，RSM-BBD was used to optimize the pipeline transportation parameters of CPB.The re-sults show that the rheological parameters obtained by the rheological test were generally larger than those obtained by the loop test，where the differences in yield stress and plastic viscosity between the two are10.4%～12.2% and 21%～32.8%，respectively.Response surface analysis showed that the sensitivity of a single factor on pressure loss was as follows concentration > pipe diameter > flow rate.And it was found that the interaction between factors had a significant effect，in which the interaction between mass fraction and pipe diameter played a decisive role.Taking the actual filling demand of Jinchuan as the background，the transport parameters optimized by response surface were as follows：pipe diameter 220mm，flow rate142.4 m3/h，and concentration 73.2%.The research results are of great significance to the selection of the CPB system operating parameters.

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