168kA新型阴极高效节能铝电解槽磁流体运动的数值模拟

Numerical Simulation of Magnetohydrodynamic Flow in 168 kA New Type Cathode Energy Saving Aluminum Elyctrolytic Cells

建立了168 kA新型阴极铝电解槽磁流体运动的数学模型,对电解质与铝液交界面的流场、电解质的流场以及阴极铝液的流场进行了模拟,并对新型阴极电解槽阳极导杆等距电压降进行了测量。研究结果表明：新型阴极铝电解槽可隔断槽内铝液流动,降低槽内阴极铝液的流速。新型阴极铝电解槽铝液与电解质交界面的速度矢量和较普通阴极铝电解槽铝液与电解质交界面的速度矢量和低2～3倍,且极值分布更为均匀。新型阴极电解槽内铝液与电解质界面处的磁流体速度最大,然后以界面为中心线逐渐减小。

Numerical models of magnetohydrodynamic flow in 168KA new type cathode aluminum reduction ceils were established. The flow field of interface between electrolyte and liquid metal, the flow field of electrolyte and liquid metal were simulated, respectively. The voltage drop of anode conductor was measured. The results indicate that new type cathode aluminum reduction cells could block off liquid metal flowing, lower the flowing speed of liquid metal. The velocity vector of interface between electrolyte and liquid metal in new type cathode aluminum reduction cells is 2 -3 times lower than that in normal cathode aluminum reduction cells and the distribution of extreme value in new type cathode aluminum reduction cells is more uniform. The velocity of magnetohydrodynamic flow in the place between electrolyte and liquid metal is the greatest, and then the velocity is reduced gradually around the interface between electrolyte and liquid metal.