CONTINUOUS STEEL MAKING METHOD USING PLURAL DIVIDED TYPE REFINING FURNACES

摘要

PURPOSE:To supply a molten steel which is refined to a continuous casting machine without interruption by preparing plural steel making lines consisting of one upper tank and plural lower tanks, shifting blowing time from each other and connecting successively the upper tank and the lower tanks. CONSTITUTION:The respective steel making lines are formed of the upper tank E and the lower tanks A, C; the upper tank F and the lower tanks B, D. Blowing is first executed with the upper tank E and the lower tank A and the blowing of the upper tank F and the lower tank B is started in the mid-way of the blowing. The blowing is started with the upper tank E and the lower tank C at the point of the time when casting from the tank A to a tundish is started upon ending of the blowing in the tanks E and A. The blowing of the upper tank F and the lower tank B ends and the blowing is started with the upper tank F and the lower tank D at the point of the time when the casting with the tank A ends. The casting with the tank B ends and the blowing with the tank E and the tank C ends at the point of the time when the charging of the molten steel to the tank A ends. The steel making is thus executed continuously by shifting the blowing time of the upper tanks E, F and the lower tanks A, B, C, D from each other in the above-mentioned manner.