Some Aspects of Heat Transfer Between Bath and Sideledge in Aluminium Reduction Cells
Some Aspects of Heat Transfer Between Bath and Sideledge in Aluminium Reduction Cells
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DOI：
10.1007/978-3-319-48160-9_68
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
A. Solheim
中科院分区：
文献类型：
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作者：
A. Solheim
A literature review concerning the heat transfer coefficient between bath and sideledge(h)is given. Normally, the heat transfer is controlled mainly by the circulating bath motion due to gas drainage into the peripheral channel. After the introduction of slotted anodes that direct the gas towards the centre channel, it is likely thathwill be determined by natural convection in some cases, and an equation is suggested to take this into account. The coupling between heat and mass transfer during melting and freezing of sideledge was studied in a numerical model involving multicomponent diffusion. During freezing, the concentration of bath components other than cryolite is higher at the ledge surface than in the bulk of the bath. The surface temperature of the ledge varies with the rate of freezing and melting, in such a way that the variation of the ledge thickness becomes slower than thought earlier.
