PURPOSE: To reduce the microcracks resulting from thermal expansion and infiltration of zinc by forming the convection passage of molten zinc flowing in an induction field with aluminum titanate.
CONSTITUTION: A coil 2 is provided close to a convection passage 4 through an iron core 3. The passage 4 is provided with a water-cooled jacket 5 and fixed to a molten zinc vessel by a flange 6. A current flows in the zinc in the passage 4 to generate Joule heat, the zinc is heated, whereas the passage itself as a sintered article is not heated since it does not transmit heat. The passage 4 of molten zinc flowing in an induction field is made with a U-tube in this way, hence the passage is not eroded by zinc or broken and has strength, and backup mortar is not needed. Further, when the heater is exchanged, a fresh one is connected to the vessel, and molten zinc can be immediately filled because the heater is resistant to rapid heating and cooling.
HIROKI NOBUYOSHI
HARA TOSHIHIRO
KUBOTA ATSUYUKI
KAYAMA MASANORI
IMAE KENJI
IMAE KOGYO KK
| JP3006299B | ||||
| JPH02258670A | 1990-10-19 |