SLAG COATING METHOD OF CONVERTER

摘要

PURPOSE:To prolong the furnace life and also to decrease the suspension time of a furnace accompanied with the titled coating and the consumption of a slag modifying agent or the like by bonding and laminating sufficiently a slag coating layer on an inside wall surface of a furnace. CONSTITUTION:After the tapping of a coverter 3 executed with a refractory 2, a modifying agent such as delomite is added to the residual slag 4 in the inside of the converter 3 and a slag coating layer 6 is formed on an inside wall surface 7 by blowing gas such as Ar and N2 through the tuyeres 5 and dissipating the slag 4. Then a forced-cooling lancer 9 which is provided with plural pieces of liquid spraying nozzles 10a-10f to a tip part 8 of a cylindrical body is vertically hung in the converter 3 freely movably up and down and for example, water as fluid is fed to the lance 9 via a forced-cooling installation and the dissipation is performed through the tip part 8 to cool forcedly the slag coating layer 6. Successively the coating layer 6 laminated by performing the refining of at least one charge and thereafter performing the recoating and the forced-cooling with the same means as the above-mentioned method.