摘要
实际生产运行中,铜闪速炉内常存在颗粒偏析、分布不均、下生料等问题。为研究颗粒入口不均匀分布对闪速炉反应塔内气-粒两相分布、传热和反应特性等的影响,将精矿喷嘴出口颗粒不均匀分布作为反应塔入口边界条件,采用CFD-DEM耦合模型对工业级铜闪速熔炼炉进行仿真分析。模拟结果表明,颗粒入口分布均匀性直接影响反应塔内气-粒分布特性;颗粒入口分布不均匀时,反应塔内气体和颗粒的分布均呈梭形分布,容易导致高温区接近壁面,影响闪速炉寿命;入口不均匀分布使颗粒在局部位置集中,在距离塔顶2 m高度区域内升温速率和反应速率加快,在反应塔内颗粒的平均停留时间略有增加。通过考虑颗粒入口的不均匀分布,进一步提高了铜闪速熔炼炉多物理场耦合仿真的准确性,使仿真结果更接近实际生产情况,从而为生产工艺优化提供更准确的指导依据。
In actual production operation,issues such as particle segregation,non-uniform distribution and raw material settlement often occur within copper flash furnace.In order to study the influence of non-uniform particle inlet distribution on gas-particle distribution,heat transfer and reaction characteristics in the reaction shaft of flash furnace,the particle non-uniform distribution at the outlet of the concentrate nozzle was set as the reaction shaft inlet boundary conditions.A CFD-DEM coupled model was employed for simulation analysis on an industrial-scale copper flash smelting furnace.The simulation results show that the uniformity of particle at the inlet directly affects the gas-particle distribution characteristics in the reaction shaft.Under non-uniform particle inlet conditions,the distribution of both gas and particles in the reaction shaft undergoes deformations,which may lead the high temperature closer to the wall,and consequently reduce the service life of the flash furnace.The non-uniform inlet distribution leads to localized particle accumulation.The heating rate and reaction rates increase within the 2 m zone below the shaft top,and the average residence time in the reaction shaft slightly increases.By considering the non-uniform particle inlet distribution,the accuracy of multi-physics coupled simulation for copper flash melting furnace has been further improved,making the simulation results more consistent with actual production conditions,thereby providing more reliable guidance for process optimization.
作者
李倩
郭天宇
骆祎
向阳
陈斯
LI Qian;GUO Tianyu;LUO Yi;XIANG Yang;CHEN Si(China ENFI Engineering Corporation Ltd.,Beijing 100038,China;Yangxin Hongsheng Copper Industry Co.,Ltd.,Huangshi 435200,China)
出处
《绿色矿冶》
2025年第6期57-63,共7页
Sustainable Mining and Metallurgy
基金
国家重点研发计划“有色金属生产过程多相多场先进工艺控制与优化软件”(2022YFB3304900)。
关键词
铜闪速熔炼
颗粒偏析
多物理场耦合仿真
CFD
DEM
copper flash smelting
particle segregation
multi-physics coupling simulation
CFD
DEM
