| 摘要 |
Molten metal is pooled at the bottom of an electric arc furnace and a layer of slag is formed overlying the molten metal. Electric arcs are formed between the electrodes and molten metal, the arcs piercing through the slag layer to heat the molten metal and slag. Under this condition, reduced iron is charged into the slag layer, melted by the heat of slag and separated into slag component and iron component. The slag component is absorbed into the surrounding slag layer while the iron component passes through the slag layer and mixes in the molten metal. In case the temperatures of slag and molten metal have deviated from the setting values, the input power to the electrodes and the length of arcs formed between the electrodes and molten metal are so adjusted that the setting temperatures are restored.
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