| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a trouble caused by the lowering of molten iron temperature by heating up the molten iron temperature at tapping off when cold iron is melted while supplying the cold iron into a preheating chamber so that the cold iron continuously exists in the preheating chamber and a melting chamber of a melting facility. SOLUTION: This melting process for cold iron is performed by using the melting facility 1 provided with the melting chamber 2, the shaft-type preheating chamber 3 introducing exhaust gas produced in the melting chamber and a stopping means 13 for preventing the dropping of the cold iron 15 in the preheating chamber. The cold iron in the melting chamber is melted by arc 18 while continuously or intermittently supplying the cold iron into the preheating chamber so as to keep the cold iron continuously in the preheating chamber and the melting chamber. The dropping of the cold iron is prevented by the stopping means at the point of time when a prescribed quantity of molten iron 16 is stored in the melting chamber in order to prevent the cold iron in the preheating chamber in contact with the molten iron in the melting chamber. Then, after heating up the molten iron in the melting chamber by the arc, the molten iron is tapped off while making a part of the cold iron remain in the preheating chamber.</p> |
