Numerical Simulation of Mixing Performance in Seed Precipitation Tank with an Improved Intermig Impeller
ZHAO Hong-liang ZHANG Ting-an ZHANG Chao LIU Yan ZHAO Qiu-yue WANG Shu-chan DOU Zhi-he
School of Materials and Metallurgy of Northeastern University School of Materials & Metallurgy，Northeastern University Shenyang Shenyang Aluminum & Magnesium Engineering & Research Institute School of Materials & Metallurgy，Northeastern University Shenyang School of Materials & Metallurgy，Northeastern University Shenyang School of Materials & Metallurgy，Northeastern University Shenyang Key Laboratory for Ecological Utilization of Multimetallic Mineral (Ministry of Education), Northeastern University
Abstract：Seed precipitation tank with a new-style improved Intermig impeller was numerically simulated by using the commercial software Fluent 12.0 on parallel computing graphic workstation. The suspension of Al(OH)3 particles and power consumption in the alumina seed precipitator under different conditions of the impeller off-bottom clearance height (C) and blade diameter (D) were numerically simulated by using realizable k-ε turbulence, Eulerian-Eulerian multiphase and multi-reference frame rotating models. The numerical simulation results showed that at a constant rotate speed, enlarging D was good for suspension of Al(OH)3 particles, but bigger D resulted in more power consumption. The optimal value of D/T was 0.6, T was the tank diameter. Too big or too small C was not conducive to the suspension of Al(OH)3 particles, and C had little effect on the stirring power. The optimal value of C/D was 0.55.
2011, Vol. 11 
