破碎硐室粉尘质量浓度分布规律的实验研究

发布时间：2018-05-10 08:23

本文选题：破碎硐室 + 粉尘　；参考：《东北大学学报(自然科学版)》2015年07期

【摘要】：为了解决破碎硐室粉尘质量浓度超标的问题,获取通风除尘设计的合理参数,根据相似原理,结合气固两相流的运动方程,导出了模拟破碎硐室粉尘运动的相似准则数,以西石门铁矿27#破碎硐室为原型,建立了破碎硐室相似模型,并对粉尘质量浓度分布规律进行了实验研究.研究结果表明:粉尘质量浓度在破碎机下料口附近区域内达到最大值,并以该区域为中心径向逐步降低.入口风速越大,矿石含水率越高,粉尘质量浓度越低,且当矿石含水率达到3.02%后,粉尘质量浓度基本不再降低;安装抽风除尘系统后,粉尘质量浓度基本保持在2 mg/m3以内,平均除尘率高达90%以上.
[Abstract]:In order to solve the problem of dust concentration exceeding the standard in crushing chamber and obtain reasonable parameters of ventilation and dust removal design, according to the similarity principle and the motion equation of gas-solid two-phase flow, the similarity criterion number of simulating dust movement in crushing chamber is derived. The similar model of crushing chamber was established based on 27 # crushing chamber of Xishimen Iron Mine, and the distribution of dust mass concentration was studied experimentally. The results show that the dust concentration reaches the maximum in the area near the crusher outlet and decreases gradually in radial direction. The higher the inlet wind speed, the higher the moisture content of ore and the lower the dust concentration, and when the moisture content of the ore reaches 3.02%, the dust mass concentration will not decrease basically, and the dust mass concentration will be kept within 2 mg/m3 after installing the dust collection system. The average dust removal rate is over 90%.
【作者单位】：北京科技大学教育部金属矿山高效开采与安全重点实验室;
【基金】：国家自然科学基金资助项目(51274024) 中央高校基本科研业务费专项资金资助项目(FRF-TP-14-039A1) 中国博士后科学基金资助项目(2014M560891)
【分类号】：TD714

【共引文献】