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The Simulation Of The Thermal-electric Field Of Large Prebaked Aluminum Reduction Cell Based On ANSYS

Posted on:2008-03-21Degree:MasterType:Thesis
Country:ChinaCandidate:S H MaFull Text:PDF
GTID:2121360215950730Subject:Detection Technology and Automation
Abstract/Summary:PDF Full Text Request
The thermal-electric distribution of the aluminum reduction cell has a direct impact on its stability, current efficiency and energy consumption. It is difficult to measure the thermal-electric distribution directly. Therefore, it has great significance to conduct the research by the computer.This paper studied the thermal-electric field of large prebaked aluminum reduction cell by use of ANSYS. Firstly, the structure about aluminum reduction cell was analyzed, and the 3D physics model and mathematics model for the normal production state were set up. The thermal and electric boundary conditions were given according to the industrial process. Secondly, the paper studied the thermal-electric field distribution of the 160kA aluminum reduction cell. The results showed that the total energy consumption of the 160kA reduction cell is 607.96kW per second, which included the anode heat loss 143.48kW, side heat loss 114kW, bottom heat loss 13.8kW and energy needed for electrolysis 336.68kW; the total energy input into the cell is 610.24kW per second, and the total voltage drop of the cell is 3.814V, which comprises the anode voltage 0.36V, cathode voltage 0.357V, voltage between anode and cathode 1.297V and the chemic reaction voltage 1.8V. The computation of thermo-electric distribution of 350KA cell was also conducted based on the same analysis process as 160KA aluminum reduction cell with changing some structure parameters and other parameters. It strengthens the anode thermal-electric field distribution in the condition of static energy balance and all anodes being the same height, and the thermal-electric field distribution of anode with the conditions that there is no electricity through the new anode and there" is full electricity through the new anode during the normal running of the cell. Thirdly, the anode structure parameters of 160KA aluminum reduction cell were studied and two new designs were made. In the two designs, the anode parameters and stub parameters have been increased. In one design, the length, width and height of the anode was increased respectively by 62mm, 5mm and 55mm, the diameter and the depth of the stub was increased respectively by 18mm and 13mm. In the other design, the length, width and height of the anode was increased respectively by 76mm, 6mm and 11mm, the diameter and the depth of the stub was increased respectively by 25mm and 18mm. The results showed the voltage of the cell was reduced respectively by 58mV and 91mV and energy input into the cell were reduced respectively by 197.2kWh per ton Al and 309.4kWh per ton Al.
Keywords/Search Tags:aluminum reduction cell, electric field, thermal field, anode, ANSYS
PDF Full Text Request
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