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公开(公告)号:US5028033A
公开(公告)日:1991-07-02
申请号:US415346
申请日:1989-09-07
CPC分类号: B22D2/001 , B22D37/00 , C21C5/4653 , C21C5/4673 , C21C7/0043
摘要: A method is disclosed for accurately detecting an outflow of a slag into a stream of a molten steel when the molten steel is poured from a first vessel such as a refining furnace or a ladle into an intermediate vessel such as a ladle or a tundish through a melt-discharging hole or a nozzle. At that time, an inert gas is fed into the stream of the molten steel in the nozzle through a side portion of the melt-discharging hole or the nozzle, and the detection is made based on a change in a flow rate of the inert gas sucked into the stream of the molten steel and/or in a back pressure.