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中文摘要：
根据中铝洛阳铝矿实际情况,结合放矿力学理论、室内相似试验和离散元数值模拟技术,从宏观和微观两方面深入地研究了矿仓放矿机制以及影响矿石流动性的主要因素。颗粒流数值模拟再现了放矿过程中矿石颗粒间以及颗粒与仓壁间相互作用力的动态变化过程。根据研究结果,设计了一种全新的仓内悬垂式振动助流器,并进行了现场试验,取得了很好的助流效果。它不但很好地改善了矿石流动性,解决了困扰洛阳铝矿几十年的矿仓堵塞、卡斗、起拱问题,优化了矿石和仓壁间的力学关系,减小了仓壁所受的动态接触压力,而且也大幅提高了矿仓放矿效率及生产安全系数,降低了工人的劳动强度。
英文摘要：
According to the situation of CHINALCO Henan Branch,combined with ore discharge mechanics theory,similarity experiment and discrete element simulation technology,we deeply research discharge mechanism and main factors that influence ore flow in hopper in both macro and micro conditions.Discrete element simulation shows the dynamic process of mutual interaction between particles-particles,particles-walls.According to the results,we design a new internal vertical flow-aiding device,achieve a better effect in field experiment.New device not only greatly improves the flow capability of ore in hopper,solves the blocking,arching,stucking problems which troubled CHINALCO for several decades,optimizes the mechanical relationship between ore and hopper,reduces wall dynamic contact pressure,but also largely improves the discharge efficiency and safety factor and reduces the labor intensity.
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