| 摘要 |
Disclosed herein is a method and an apparatus for improving the efficiency of conventional vertical shaft metal melting and refining furnaces. The method uses a novel refractory arrangement to form a multiple-level hearth, which will support pieces of metal that have reached the hearth without being melted. With this invention there is even and complete distribution and diffusion of heat around and through these unmelted pieces of metal to effect their rapid melting. Thus, unmelted pieces of metal cannot block burners or clog tapping outlets, and undue restriction to the flow of molten metal in and from these furnaces is substantially avoided.
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