Dephosphorization treatment device and method of dephosphorization of chartered iron using the same

摘要

An intersection of the central axis of the simultaneous blowing jet ejected from the nozzle and the bath surface of the molten iron in a state in which a nozzle and the same number of storage air vents are arranged in the furnace bottom of the converter, and a molten iron having a bath depth L ₀ is charged in the converter In both the nozzle and each group of the reservoir inlet where the distance (length of line segment SU) between the position U of and the position S of the intersection point of the bath surface of the chartered ship and the straight line drawn vertically upward from the position of the reservoir air outlet, The nozzle and the reservoir air outlet are arranged so that the height of the top lance that satisfies the condition of the length of SU ≤ L ₀ ·tan6° exists.