Simulation and experiment investigation on a dual-electrode DC arc furnace with high smelting efficiency for MgO production

作者：Fu You; Wang Zhen; Wang Ninghui^*

来源：Transactions of China Electrotechnical Society, 2016, 31(24): 79-87.

• Comparison result
• DC arc furnace
• Electrode loss
• Elliptical cross section
• Experiment investigation
• Molten bath temperature
• Output voltages
• Three dimensional finite element simulation

A 3000 kV·A three-phase AC arc furnace for MgO production has been elaborately refitted into a dual-electrode DC arc furnace with the same capacity. The relationship between the output voltage and the maximum arc length in different smelting currents has been studied. Meanwhile, the molten bath temperature field distribution was calculated by three-dimensional finite element simulation analysis method. High purity MgO crystals could be produced with the converted arc furnace. Additionally, the morphology of the molten MgO lump was similar to a tensile body with an elliptical cross section, which is consistent with the simulation results. Finally, the MgO smelting production data of DC arc furnace were compared with the data of AC arc furnace. The comparison results indicated that the dual-electrode DC arc furnace for smelting MgO has obvious advantages over the traditional three-phase AC arc furnace, from the views of energy consumption per ton, electrode loss as well as crystal purity. This paper has provided theoretical guidance and basis for the production of MgO with dual-electrode DC arc furnace.

• 出版日期2016