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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。
According to the actual situation of Chinalco Luoyang Al, combined with the theory of ore discharge, the indoor similarity test and the discrete element numerical simulation, the main factors affecting the mine ore release mechanism and the influencing ore fluidity are deeply studied from macroscopic and microcosmic aspects. The numerical simulation of particle flow reproduces the dynamic process of the interaction between the ore particles and between the particle and the silo during ore drawing. According to the research results, a new kind of overhanging vibration aimator in the warehouse was designed and carried out on-site test, and good flow-aiding effect was achieved. It not only improves the ore fluidity well, but also solves the blockage, capping and arching in ore mines plaguing luoyang aluminum mines for decades, and optimizes the mechanical relationship between the ore and the silo walls and reduces the warehouse wall Dynamic contact pressure, but also significantly increased mine ore discharge efficiency and production safety factor, reducing the labor intensity of workers.