高深直溜井卸矿口产尘规律及防治技术研究

Study on Dust Production Rules and Prevention Technology at the Discharge Port of High-deep Straight Well

针对夏甸金矿高深直溜井卸矿口的产尘能力、含尘气流时空演化规律及粒度分布规律进行了分析。卸矿口逸散含尘气流中,10μm粒径以上的粉尘占比为7%,而粒径在10μm以下的粉尘占比93%,呼吸性粉尘占比高。基于现场的通风条件、卸矿口尺寸面积及产尘规律,采用fluent软件进行模拟,对比分析了密闭抽尘前后的含尘气流运动轨迹,提出了密闭抽尘净化的治理措施。治理后高深直溜井卸矿口逸散的总粉尘浓度由420 mg/m3降低至8.7 mg/m3,降尘效率达到了97%以上,有效地解决了高深直溜井卸矿口粉尘逸散污染问题。

The dust production capacity, the dust air flow space-time evolution rules and the particle size distribution at discharge port in the high-deep straight well of Xiadian Gold Mine were analyzed. Among the dust-laden airflow at the discharge port, the proportion of dust with particle size above 10 μm is 7%, while the proportion of dust with particle size below10 μm is about 93%, and the proportion of respirable dust is high. Based on the on-site ventilation conditions, the size and area of the discharge port and the rule of dust production, the Fluent software was used to simulate the movement track of dustladen airflow before and after closed dust extraction, and the control measures of closed dust extraction and purification were put forward. After treatment, the total dust concentration at discharging port of the high-deep straight well was reduced from420 mg/m3 to 8.7 mg/m3 with the dust reduction efficiency of over 97%. Thus, the problem of dust emission pollution at discharging port of the high-deep straight well can be effectively solved.