SLAG REMOVAL DEVICE AND SLAG REMOVAL METHOD

摘要

Provided is a slag removal device for a blast furnace, capable of readily and reliably achieving slag removal using a simple device configuration, even when pulverized coal is used that has not had the softening temperature thereof adjusted, and capable of reducing as much as possible the risk of pipe damage, etc. The slag removal device for a blow pipe is provided in a blow pipe (30) that injects auxiliary fuel pulverized coal (3) together with hot air (2) from a tuyere (22) for a blast furnace main body (20) that produces pig iron from iron ore, and includes a component that melts on to pulverized coal (3) slag (S) as a result of the hot air (2) and/or the combustion heat of the pulverized coal (3). A jet nozzle (80) that injects solids (7) having a higher fusion point than the temperature in the vicinity of the tuyere and having a particle diameter greater than that of the pulverized coal (3), into pulverized coal (3) that flows inside the blow pipe (30) and into the hot air (2), is provided in the slag removal device. The injection nozzle (80) comprises a solids supply system that supplies the solids (7) and has provided therein an open/close control valve (89).