Blocking door of converter smelting furnace and operation method of converter smelting furnace

摘要

PROBLEM TO BE SOLVED: To suppress a slug from sticking to a meeting position in a converter type refining furnace that performs intermediate waste discharge.SOLUTION: A converter type refining furnace includes a first door part that has a first meeting part on one end side in an uniaxial direction and can cover a part of a furnace front side opening part of a fixed wall of the converter type refining furnace, and a second door part that is disposed in parallel with the first door part in the uniaxial direction, has a second meeting part on one end side opposite to the first door part, and can partially cover the furnace front side opening part, in which, in a state where the first meeting part and the second meeting part meet and the first door part and the second door part cover and close the furnace front side opening part, a first distance d in the direction in parallel with the uniaxial direction of a meeting position where the first meeting part and the second meeting part meet and a center position of the throat of a furnace body is larger than 0 m, and a relationship between a radius r of the throat, a second distance L between the throat and a furnace front floor, and a height from a center of a trunnion rotation axis of the furnace body to the throat satisfies a formula (1): d/r≥1-3 L/H.SELECTED DRAWING: Figure 1