コールドクルーシブル炉の効率改善（第二報）

概要

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A cold crucible furnace is well used in melting of active and high-temperature metals because it allows melting of high-purity and high-temperature. Especially it applies to TiAl for turbine impeller of automotive engine and titanium alloys for golf club and biomaterial. A water-cooling copper crucible is used in the furnace and slits are created in it. A shape of slit is very important for an efficiency of the furnace because it allows the magnetic flux generated by the current of the heating coil to enter into the crucible. In this study the magnetic-flux density in the crucible has been measured and calculated by three dimensional magnetic field simulation, and the effect of the slit shape on the magnetic field in the crucible has been investigated. Expanding the slit frontage and widening the width of the slit accelerate to enter the magnetic flux into the crucible and increase the magnetic-flux density in it. The consumption of the electric power at the crucible is reduced and the efficiency of the furnace is improved consequently.
電気製鋼研究会の論文