Method for repairing a cupola furnace with hot blast

摘要

The invention relates to a method for repairing a cupola furnace with hot blast, intended to operate over a long period, in which, after completion of fusion in the cupola furnace and cooling of the siphon of the cupola furnace, the residual slag is then removed, and broken up, and a lining of refractory material is installed. In order to reduce the repair time and to permit new lining at customary temperatures, there is simultaneous cooling with liquid nitrogen and breaking-up of the residual slag in the damaged zone 4 above the lining made from rammed refractory lining 3 of the cupola furnace 1 with the aid of a remote-controlled apparatus. IMAGE