Abstract: A launder for discharging melt from a metallurgical furnace is disclosed which includes a launder body having one end connected to the furnace. The launder body defines a fluid passageway for allowing the melt, flowing from the metallurgical furnace into the one end to flow therethrough in a direction away from the furnace. The launder body includes a threshold portion for determining the melt level in the furnace, above which the melt in the furnace begins to flow into the launder body. The launder body further includes a closing portion constructed to receive a closing material thereon to close the fluid passageway of the launder body. The closing portion is arranged at a position displaced downstream with respect to the threshold portion and has a bottom lower than the threshold portion. Additionally, a metallurgical furnace installation using the above launder is disclosed, in which a pair of the launders are arranged while ensuring space for casting or removing operations of castable.

Abstract: An apparatus is disclosed for water-granulating slag being discharged from a discharging launder. The apparatus includes a receiving launder arranged below the discharging launder. The receiving launder has opposite side walls to define a widthwise space therebetween. A water-jetting device is provided to jet granulating water to the slag, being discharged from the discharging launder, to water-granulate the slag. The jetting device includes a plurality of partitioning plates arranged in the receiving launder so as to span the widthwise space between the side walls thereof and spaced from each other so as to define a plurality of water outlets, and a water supplying unit for supplying the granulating water into the water outlets to be jetted therefrom against the slag.

Abstract: A tubular water-cooled jacket for furnaces is disclosed which includes a tubular member having a plurality of axial apertures and a plurality of transverse apertures. Each transverse aperture is formed therein so as to bring at least two of the axial apertures into open comunication with each other. The plurality of axial apertures and the plurality of transverse apertures corporate with one another to define a plurality of fluid passageways for cooling water isolated from one another. Each of the fluid passageways may be defined by at least two of the axial apertures and at least one of the transverse apertures connected to the at least two axial apertures. The tubular member may include a plurality of segments arranged side-by-side in a circumferential direction thereof and joined together.