X.P. Li
,
J. Li
,
Y.Q. Lai
,
H.Q. Zhao
,
Y.X. Liu
金属学报(英文版)
A 2D full cell thermo-electric model of 160kA drained cell was set up using finite
element code to calculate its freeze profile, then the drained cell model was modified
according to the freeze profile computed and its heat balance was calculated. Compared
with that of a 160kA conventional Hall-Heroult cell (H-H cell), though the melts volume of the drained cell reduced greatly, the whole heat loss from it didn't drop down
apparently, and an analysis was presented in the paper. On the other hand, the anode-
cathode distance (ACD) of a drained cell was much less than that of a H-H cell, so
the voltage drop on it and heat produced decreased too, steps should be taken to keep
a workable heat balance on a drained cell.
关键词:
drained cell
,
null
,
null
J. Li
,
Q.S. Zhang
,
Y.Q. Lai
,
S.L. Ye
,
Y.X. Liu
金属学报(英文版)
The thermal stresses relaxation of Ni/NiFe2O4 system functionally graded cermet inert anode for aluminum electrolysis was optimally designed. The transient thermal stresses of the inert anode under complex boundary condition during high-temp (955℃) electrolysis were calculated using the finite-element software ANSYS, the influence of different parameters on the distribution of the thermal stresses were analyzed. The results showed that, during the process of thermal shock, the thermal hoop tensile stress on the surface of the anode is very large, which is possibly the major cause of anode crack; when the radius of the anode is between 0.05-0.15m, a range that can be realized by recent manufacturing technology, the optimum composition distribution exponent p is 0.25; The hoop tensile stresses reduce with the decrease of anode scale and also decrease with the decrease of the convection coefficient between the electrolyte and the anode.
关键词:
functionally graded material (FGM)
,
null
,
null
