To provide a metal reining method or the like which can materialize improvement in safety and prevention of reduction in yield by suppressing scattering of molten metal to the outside of a crucible without increasing the number of parts.
The metal refining method uses a metal refining apparatus provided with: a molten metal holding crucible 2; a heating means 5 heating a molten metal 4 in the molten metal holding crucible; and a rotatable rotary cooling body 32, and the method comprises: immersing the rotary cooling body 32 into the molten metal 4 stored in the holding crucible 2; and while rotating the rotary cooling body 32, causing the rotary cooling body 32 to crystalize metal with high purity. In the method, relationship among H, h and d satisfies the conditions of 0.55≤(H-h)/d, wherein the depth of the holding crucible is expressed as H, the height of the molten metal from the bottom of the crucible is expressed as h, and the inside diameter of the opening part in the crucible is expressed as d.
COPYRIGHT: (C)2009,JPO&INPIT
Katsuki Yoshida
Maeda Masao
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