A cooling system to cool a surface of a tilting metallurgical furnace including an inner plate of the surface, a plurality of nozzles, and a drain manifold is disclosed. The inner plate has an external surface and an internal surface. The plurality of nozzles is configured to be fluidly connected to a coolant supply pipe. At least a first nozzle of the plurality of spray conduits is configured to spray coolant against the external surface of the inner plate. The drain manifold positioned to receive coolant from the external surface of the inner plate. At least a second nozzle of the plurality of nozzles is configured to spray coolant directly into the drain manifold.

A method of quickly changing a portion of the roof of an electric arc furnace having a top loading roof system comprising providing at least one pie-shaped water cooled panel supported below the roof support beams and located to protect the underside hot face of the roof support beams, providing at least one quick water disconnect for connecting the at least one pie-shaped water cooled panel to a water supply, raising and removing the at least one pie-shaped water cooled roof panel, replacing the at least one pie-shaped water cooled roof panel with another pie-shaped water cooled panel or repairing the at least one pie-shaped water cooled roof panel, and continuing operation of the furnace.

The present invention relates to a method of manufacturing a slag discharge door, which is provided separately from a molten-steel discharge opening in an electric furnace and opens and closes a slag discharge opening for discharging slag. The method of manufacturing the slag discharge door, which moves up and down on the slag discharge opening to open and close the slag discharge opening, includes the steps of: forming a door body by forging, forming a coolant passage, a coolant inlet, and a coolant outlet in the door body by drilling, and then finishing a passage that blocks a portion that is open toward an outer surface of the door body.

An apparatus is disclosed for a split spray-cooled roof for a tilting metallurgical furnace. The split spray-cooled roof has a center, a first hollow metal roof section and a second hollow metal roof section. The first and second hollow roof sections are attached together along a prescription split line. The prescription split line having a first split line and a second split line, wherein the first split line is not aligned with the second split line and wherein the first and second split line are not aligned with the center.

An arc furnace having a furnace vessel for melting steel, a cover for closing the furnace vessel and a pivot unit with which the cover can be moved away from the furnace vessel in which the furnace vessel is mounted so as to be movable in the vertical direction relative to the pivot unit, and the pivot unit has a holder for releasably fixing the cover in the vertical direction.

The present invention relates generally to a ladle metallurgy furnace having an improved roof structure. The improved roof may comprise an internal surface structure having a substantially smooth exterior surface, an external surface structure spaced apart from the internal surface structure, a plurality of channels that are defined intermediate the internal and external surface structures, a supply port in fluid communication with at least one channel through the second surface structure and in further fluid communication with a supply line, and a return port in fluid communication with at least one channel through the external surface structure and in further fluid communication with a return line.

Embodiments of the present invention comprise a refractory delta made from a refractory material having a cold-face side and a hot-face side. One or more electrode apertures are located in the refractory delta for receiving one or more electrodes. One or more cooling apertures extend from the cold-face side of the refractory material to adjacent the hot-face side of the refractory material. The one or more cooling apertures may further comprise a copper tube. A cooling system delivers a cooling liquid to the one or more cooling apertures, and the cooling liquid draws heat from the adjacent refractory material, including the hot-face side, and evaporates to allow replacement cooling liquid to further draw heat from the adjacent refractory material.