| 摘要 |
<p>A DC arc furnace hearth is formed by a layer of carbon bricks above which an electrically relatively non-conductive refractory compound is rammed to contain a melt, and metal bars or rods inserted through the compound so that their upper ends are exposed to the melt and their bottom ends are in electrical connection with the bricks, forming an electrically conductive hearth. An arcing electrode above the melt can be connected to one pole of DC power and the hearth connected to the other so that an arc is formed between the electrode and melt.</p> |
