大粒径矸石料浆配比优化及全尺寸环管输送阻力测试研究  

Experimental Study on Ratio Optimization of Large Particle Size Gangue Slurry and Full-scale Ring Pipe Conveying Resistance

作　　者：苏鹤鸣 刘思旭 陈为高 杨波[1] SU Heming;LIU Sixu;CHEN Weigao;YANG Bo(China Shenhua Energy Co.,Ltd.,Beijing 102209,China;China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国神华能源股份有限公司,北京102209 [2]中国矿业大学,江苏徐州221116

出　　处：《煤炭技术》2025年第1期71-77,共7页Coal Technology

摘　　要：为确定不同粒径范围矸石料浆的最优配比,给出了大粒径矸石料浆骨料粒径的划分依据,提出了矸石料浆输送性能的优化原理,设计了输送性能测试指标及筛选标准,揭示了0~2 mm和0~5 mm这2种粒径范围矸石料浆输送性能随浓度和粒径级配的变化规律,分析了大粒径矸石料浆输送性能指标的变化机理,最终结合输送性能筛选标准确定了大粒径矸石料浆最优配比,并通过全尺寸环管输送测试验证了料浆优选配比的可行性。结果表明:矸石料浆中0~0.15 mm小粒径矸石具有较强的保水悬浮能力,对矸石料浆的输送性能具有明显改善作用;料浆的沉析率随浓度升高而减小,随粗粒径矸石占比增加而增大;料浆的黏度随浓度升高而增大,随粗粒径矸石占比增加而逐渐降低。矸石料浆在直管段的压力损失受浓度、粒径级配的影响,在弯管段又受到管路曲率半径的影响。In order to determine the optimal ratio of gangue slurry with different particle size ranges,the basis for dividing the particle size of large-sized gangue slurry was provided,and the optimization principle of gangue slurry transportation performance was proposed.The transportation performance testing indicators and screening criteria were designed,and the variation laws of the transportation performance of gangue slurry with concentration and particle size grading in two particle size ranges of 0-2 mm and 0-5 mm were revealed.The variation mechanism of the transportation performance indicators of large-sized gangue slurry was analyzed,and finally,the optimal ratio of large-sized gangue slurry was determined based on the transportation performance screening criteria.The feasibility of the optimal ratio of slurry was verified through full-scale ring pipe conveying testing.The research results indicate that the small particle size gangue with a diameter of 0-0.15 mm in the gangue slurry has strong water retention and suspension ability,which significantly improves the transportation performance of the gangue slurry;The settling rate of the slurry decreases with increasing concentration and increases with increasing proportion of coarse-grained gangue;the viscosity of the slurry increases with increasing concentration and gradually decreases with increasing proportion of coarse-grained gangue.The pressure loss of gangue slurry in the straight pipe section is affected by concentration and particle size distribution,and in the bent pipe section,it is also affected by the curvature radius of the pipeline.

关 键 词：大粒径矸石料浆 保水悬浮 输送性能 配比优化 全尺寸环管输送 

分 类 号：TD823[矿业工程—煤矿开采]