| Abstract |
| Both fluid flow in the plasma region and heat/momentum transfers from the plasma to the molten steel surface in a DC arc furnace were numerically analyzed by considering the shape change of a molten steel surface due to the high velocity plasma jet. Calculated plasma characteristics and heat and momentum transfers from the plasma to the molten steel were compared and discussed with previous results which had been calculated under the assumption of the flat surface of the molten steel. It was found that the formation of a groove enlarged the current flowing area on the melt surface. Although the heat transferred on the melt surface and current flowing area increased by the groove formation, the shear surface acting on the melt surface decreased. By increasing arc current, the radius and depth of grooves, the joule heat, the radiation loss, the heat and shear force transferred to the melt surface and groove area increased. By increasing arc length, the groove radius increased and the groove depth decreased, respectively. And the joule heat generated, the radiation loss and the heat transferred to the melt surface and the shear force acting on the melt surface decreased. But the heat transferred to the groove area and the shear force acting on the groove area decreased. |
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| Key Words |
| DC arc furnace, Numerical analysis, Molten steel, Electromagnetic force |
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