| 摘要 |
PROBLEM TO BE SOLVED: To build a gas-stirring induction furnace without the use of extrusion plug prepared separately, in which a gas bubbling plug and an extrusion block are provided wherein slag on a cast iron surface is collected at one portion without spreading it in its vicinity. SOLUTION: There are provided a truncated cone shaped gas bubbling plug 5, disposed at the position of an eccentric shaft 17 separated away from a crucible central shaft 16, located substantially at the center of an induction furnace and inserted into a sleeve 7, a gas inlet tube 6 connected with the central portion on the bottom surface of the gas bubbling plug 5 and extended to a lower portion of a furnace body bottom 11, an extrusion block 10 formed between the surroundings of a solid brick 9 and a refractory cement 4 disposed on the furnace body bottom 11, and a frame table 13 provided over an opening formed in the furnace body bottom 11.
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