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概要

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The purpose of this study is to develop a new melting and rifining method of ferrous, non-ferrous metals and their alloys in utilizing super high temperature of plasma arc, inert gas atmosphere, powerful stirring and so on. Furthermore, this study aims at the development of economical plasma arc furnace.After examination of test results of a 80kg (steel base) melting furnace which uses 100kW generating power of plasma arc and also a 250kg (steel base) melting furnace combined with 130kW high frequency induction heating, we installed a new 500kg (steel base) melting furnace. The power source of this furnace is combined with 200kW plasma torch and 200kW commercial frequency induction apparatus. The combination of plasma arc and the induction heating source reduces melting time, melting power and the consumption of argon, and the stirring phenomenon caused by the combined induction heating method brings all the portions of the molten metal in the local to the superhigh temperature region just under the torch.The metals and alloys produced by this furnace are degassed as high quality as those produced by vacuum melting.
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