An inhomogeneous three-phase model for the flow in aluminium reduction cells
An inhomogeneous three-phase model for the flow in aluminium reduction cells
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DOI：
10.1016/j.ijmultiphaseflow.2010.08.009
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发表时间：
2011-01-01
影响因子：
3.8
通讯作者：
Lai, Yanqing
中科院分区：
文献类型：
--
作者：
Li, Jie;Xu, Yujie;Lai, Yanqing
准确预测熔体流动和金属-熔池界面变形对设计高电流效率稳定运行的工业铝电解槽至关重要。本文建立了金属、熔池和气泡三相非均匀流动模型。利用该模型，采用有限体积法对300 kA电解槽内的流动进行了数值计算，结果揭示了三相运动之间的关系，证明了电解槽内流动的整体性是不可忽略的。基于表面更新理论，将熔体流动与还原体在金属-熔池界面的传质联系起来，建立了改进的CE计算模型。利用该模型对300 kA电池的局部CE进行了预测，得到的电池整体CE值是合理的。(C)2010爱思唯尔有限公司版权所有。
The exact prediction of both the melts flow and metal-bath interface deformation is critical to the design of commercial aluminium reduction cells which operate steadily at high current efficiency (CE). An inhomogeneous flow model of three phases, metal, bath and gas bubbles, was established in this study. The flow in a 300 kA cell was numerically computed with the model by using the finite volume scheme, and the results reveal the relation among the motion of the three phases and prove that the globality of the flow in cells could not be neglected. An improved calculation model of CE, based on the surface renewal theory, was also developed by connecting the melts flow with the mass transfer of reduced entity at the metal-bath interface. Using the model, the local CE in the 300 kA cell was predicted, and the calculated CE value of the whole cell is reasonable. (C) 2010 Elsevier Ltd. All rights reserved.