稀土熔融负压采集流体动力学仿真

Fluid Dynamics Simulation of Rare Earth Melting Negative Pressure Acquisition

电解还原工艺是稀土生产最重要的工序之一,其中熔融成品负压采集技术是制约配套智能化装备应用的瓶颈。研究流体受高温、粘度、密度、烧损等因素的影响,采用抗高温材料建立负压采集系统三维模型;经接口兼容处理,导入计算流体动力学仿真(Computational Fluid Dynamics, CFD)环境;分析20kA设备生产环境确定仿真边界。以采集效率及稳定性为控制量,运用统计原理制订仿真策略,取得优化的管径、倾角、弯管曲率、压强、保温隔热等设计参数组合。结果表明,熔融成品出料连续稳定,速率120kg/min,真空环境无烧损。

Electrolytic reduction process is one of the most important processes in rare earth production, in which the negative pressure collection technology of molten finished products is the bottleneck restricting the application of supporting intelligent equipment. The influence of high temperature, viscosity, density, burning loss and other factors on fluid was studied, and a three-dimensional model of negative pressure acquisition system was established by using high temperature resistant materials. Through interface compatibility processing, import CFD environment;Analyze the production environment of 20 kA equipment to determine the simulation boundary. Taking the acquisition efficiency and stability as the control quantity, the simulation strategy was formulated by using statistical principle, and the optimized design parameters such as diameter, inclination Angle, bend curvature, pressure, heat preservation and heat insulation were obtained. The results show that the molten finished product is continuous and stable, with a rate of 120 kg/min and no burning loss in vacuum environment.