CAJ | 학술논문

常温常压条件下基于欧拉模型，利用Fluent软件对高1．6 m、内径0．09 m的高硫高砷金精矿三相流化床流动特征进行了数值模拟。模拟过程以空气为气相且为连续相，液态水为液相，密度为3．2 g／cm3、粒径为0．5 mm的高硫高砷金精颗粒为固相。模拟结果显示，流场的压力从计算域的入口到出口逐渐降低，速度场的变化对气液固局部相含率的分布影响显著；在径向上，气含率（εg）从计算域中心往边壁降低，在轴向上也逐渐降低；固含率（εs）从计算域的入口到出口逐渐减小，从计算域中心向边壁εs 增加。模拟结果与实验结果一致，可为合理设置气流速度以及金矿投放量提供依据。
상온상압조건하기우구랍모형，이용Fluent연건대고1．6 m、내경0．09 m적고류고신금정광삼상류화상류동특정진행료수치모의。모의과정이공기위기상차위련속상，액태수위액상，밀도위3．2 g／cm3、립경위0．5 mm적고류고신금정과립위고상。모의결과현시，류장적압력종계산역적입구도출구축점강저，속도장적변화대기액고국부상함솔적분포영향현저；재경향상，기함솔（εg）종계산역중심왕변벽강저，재축향상야축점강저；고함솔（εs）종계산역적입구도출구축점감소，종계산역중심향변벽εs 증가。모의결과여실험결과일치，가위합리설치기류속도이급금광투방량제공의거。
The numerical simulation was conducted using the Fluent software based on the Euler model for the flow characteristics of three?phase fluidized bed (1.6 m in height and 0.09 m in internal diameter) of a high?sulfur and high?arsenic gold concentrate under normal conditions. In the simulation, air was taken as continuous gas phase, water as liquid phase and the high?sulfur and high?arsenic gold concentrate with particle size of 0.5 mm and density of 3.2 g/cm3 as solid phase. Results showed that pressure of the flow field reduced gradually from the entrance to the exit of the computational domain. The variation in the velocity field significantly affected the distribution of local phase holdups. The gas holdup (εg ) decreased from the center to the edge of the computational domain in the radial direction and gradually decreased in the axial direction too. While the solid holdup (εs ) increased from the center to the edge of the computational domain, but gradually decreased from the entrance to the exit. The simulation results were consistent with the experimental results, which will be helpful for setting reasonable air velocity and appropriate dosage of gold.