磨料特性对磨料气体射流破煤影响的实验研究

发布时间：2018-05-16 15:37

本文选题：磨料特性 + 磨料气体射流　；参考：《中国安全生产科学技术》2017年05期

【摘要】：针对磨料气体射流,基于气固两相流理论分析影响磨料速度的因素,在一定喷嘴结构基础上,通过实验研究磨料特性对破煤效果的影响。通过理论分析发现,影响磨料速度的主要因素有磨料密度和磨料粒径。实验结果表明:在射流压力一定条件下,石英砂、石榴石和棕刚玉3种磨料中棕刚玉破煤深度最大,在80,120,200和280目4种不同目数磨料中,120目磨料破煤效果最优。通过分析磨料特性的影响,得出磨料硬度对破煤的影响最大,其次是磨料密度。开展磨料气体射流破煤实验,确定了磨料气体射流中最优射流靶距为70 mm,最佳破煤磨料为120目的棕刚玉磨料。
[Abstract]:Based on the theory of gas-solid two-phase flow, the effect of abrasive characteristics on coal breaking effect was studied through experiments on the basis of a certain nozzle structure in view of abrasive gas jet. Through theoretical analysis, it is found that the main factors affecting abrasive speed are abrasive density and abrasive particle size. The experimental results show that under certain jet pressure, the coal breaking depth of brown corundum is the largest among three kinds of abrasive materials, quartz sand, garnet and brown corundum, and the coal breaking effect of 80120200 and 280 mesh abrasive is the best. By analyzing the influence of abrasive properties, it is concluded that abrasive hardness has the greatest influence on coal breaking, followed by abrasive density. The experiment of coal breaking with abrasive gas jet was carried out. The optimum jet target distance was 70 mm and the best coal breaking abrasive was 120 object brown corundum abrasive in abrasive gas jet.
【作者单位】：河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地);河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;河南理工大学安全技术培训学院;
【基金】：国家自然科学基金项目(51404100,51574112) 教育部“创新团队发展计划”(IRT_16R22) 河南省科技创新杰出青年(164100510013)
【分类号】：TD712.63

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