| 摘要 |
<p>An improved method of melting metal scrap in a molten melting media is disclosed. The method comprises the steps of providing a body of molten melting media (74) in a housing (36) having an upper portion (78) and a lower portion (76), the lower portion (76) having a generally cylindrical wall section. A supply of metal scrap (72) is added to the housing (36) and a supply of molten melting media (74) is introduced to the upper portion (78) of the housing (36). Melting of the metal scrap (72) is initiated by ingesting it and molten melting media (74) downwardly in the housing (36) by action of an impeller (73) positioned in the lower portion (76), the impeller (73) having a flat ring member (90) having an opening in the center thereof and having blades (94) extending from said ring member (90) to a substantially circular disc member (92). The scrap (72) and melting media (74) enter the opening in the ring member (90) in an axial direction and are propelled therefrom in a radial direction by use of the blades (94). The impeller (73) is positioned in the cylindrical wall section such that at least the ring member (90) cooperates therewith to move the scrap (72) and melting media (74) from the upper portion (78) through said impeller (73) while substantially avoiding recirculation of the molten melting media (74) within the housing (36) to the upper portion (78).</p> |
