AUTO CONTROL METHOD OF THE MELT WEIGHT IN TUNDISH IN THE PROCESS OF CONTINUOUS CASTING

摘要

A method of automatically controlling weight of molten steel within a tundish in the continuous casting process is provided to control the weight of molten steel to a predetermined value without intervention of an operator. A method of automatically controlling weight of molten steel within a tundish in the continuous casting process comprises: a step(S201) of setting a target weight of molten steel in the tundish and fully opening a slide gate until the weight of molten steel reaches a predetermined value; a step(S202) of determining whether the weight of molten steel has reached the predetermined value and repeating the step(S201) until the weight of molten steel reaches the predetermined value; a step(S203) of controlling the PI controllers such that a present weight of molten steel follows the target weight value by PI controllers when the weight of molten steel has reached the predetermined value; a step(S204) of adjusting a slide gate to a minimum opening distance for maintaining the target weight value according to the control results of the step(S203); a step(S205) of determining if the present weight of molten steel has exceeded the target weight value as much as a predetermined amount to repeatedly perform the step(S204) if the present weight of molten steel has not exceeded the target weight value; and a step(S206) of reducing the minimum opening distance of the slide gate if the present weight of molten steel has exceeded the target weight value as much as the predetermined amount.