| 摘要 |
<p>PURPOSE:To reduce heat loss and to prevent efficiently reduction in the yield of Cr by restricting the percentage of alloying elements to be fed from molten metal prepared by melting scrap and ferroalloy in the amount of alloying elements necessary for molten metal after mixing. CONSTITUTION:Crude molten metal prepared by melting scrap and ferroalloy in a melting furnace is mixed with dephosphorized molten iron. At this time, >=50% of alloying elements necessary for the mixed molten metal is fed by melting in the melting furnace so as to ensure the desired concn. of alloying elements in the molten metal. The remainder of the alloying elements is added in a refining furnace (converter). Since the amount of the elements to be added is not large, heat loss can be reduced, and reduction in the yield of Cr can be prevented.</p> |
