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| Number | Title | Issue Date |
| 5945063 | Bottom blown gas blowing apparatus for molten metal ladle The present invention relates to an apparatus for supplying bottom-blown gas through a porous plug in a ladle and for molten metal refining. A gas supply pipe 3 is connected to a bottom-blowing porous plug 2 attached at the bottom of a ladle 1. An accumul... | 08/31/1999 |
| 5573724 | Ladle port assembly A ladle port assembly having a longer use life than a conventional porous plug includes an inner refractory member constructed from a high-fired alumina-containing refractory material, a middle refractory member surrounding the inner member and also const... | 11/12/1996 |
| 5249779 | Modified manifold assembly for directional gas distribution device A modified manifold assembly for pocket blocks having fusto conical openings therethrough. The manifold assembly defines an interconnecting passageway from a central gas input supply to multiple formation of gas conveying passageways within the pocket blo... | 10/05/1993 |
| 5171511 | Tuyere and method for discharging gas into a furnace A tuyere and method for discharging an agitating gas into the molten contents of an electrically heated furnace to reduce temperature and composition variations in its contents. The tuyere comprises a refractory plug and sleeve for installation into the r... | 12/15/1992 |
| 5037072 | Injection block and method An injection block of an injection valve is disclosed which is normally intended for installation in a metallurgical vessel or holding vessel containing ferrous metal. Other metals can be similarly treated by injection metallurgy, but the maximum utility ... | 08/06/1991 |
| 4938459 | Mechanically sealed tuyere block A tuyere block assembly design permitting intermittent flow of gas into the bottom of a metallurgical vessel is provided having the tuyere block assembly open to permit flow of gas into the vessel and closes when the flow of gas into the furnace is not de... | 07/03/1990 |
| 4840356 | Externally replaceable stirring plug for molten metal vessels A device for introducing gas into a mass of molten metal in a vessel for creating a stirring action therein by way of an apertured block in the refractory lining of said vessel. The device communicates with an opening in the vessel, the opening being size... | 06/20/1989 |
| 4789139 | Methods of and apparatus for constructing refractory brick linings on tuyere plates for metal treating vessels A method of constructing a refractory brick lining on a bottom tuyere plate for a vessel for refining or otherwise treating a metal melt comprises the improvement of constructing the lining in an imperforate manner on the bottom tuyere plate and then dril... | 12/06/1988 |
| 4771992 | Multi-hole injection valve A multiple orifice injection valve having a stationary block which communicates between the vessel and a sliding plate. The sliding plate is provided with at least one injection port and drive means for rotatably indexing the same in and out of register w... | 09/20/1988 |
| 4568066 | Apparatus for introducing gas to molten metal A scavenger for injecting gas into molten material where a refractory member fits within an opening in a refractory lining. The cold face of the scavenger fits within a recess of a base that includes a gas conduit in the form of a double spiral. The gas c... | 02/04/1986 |
| 4565355 | Flushing arrangement for a metallurgical vessel In a flushing arrangement for a metallurgical vessel, a metallic flushing plate is installed on pre-determined sites of the bottom or the vessel walls between neighboring refractory bricks. The flushing plate has two plate-shaped metal walls delimiting at... | 01/21/1986 |
| 4438907 | Gas blowing nozzle, and production and usage thereof A gas blowing nozzle is produced by molding a non-porous substance into a molding frame under pressure and at the same time positioning a plurality of gas passageways forming members at predetermined spaces and distances from each other. The passageway ho... | 03/27/1984 |
| 4378242 | Vacuum purification of liquid metal A bath of liquid steel containing metallic impurities is subjected to vacuum effective to cause emission from the bath surface of the metallic impurities as a bulk flow of rising gases. The surface of the bath is kept substantially free of surface contami... | 03/29/1983 |
| 4123042 | Steel converter vessel tuyere block construction A tuyere assembly for use in metallurgical vessels includes a tubular metallic tuyere housing which is cast in a book of refractory material. When the tuyere block is installed in a metallurgical vessel, a tuyere is inserted within the tubular tuyere hous... | 10/31/1978 |
| 4022445 | Converter bottom structure A refractory bottom lining has extending therethrough at least one inclined decarburization or refining nozzle or tuyere. Surrounding the nozzle is an outer perforate brick having a hole therethrough. An inner brick fits within the hole of the outer brick... | 05/10/1977 |
| 3944083 | Bottom handling apparatus for steel converter vessels A converter vessel bottom handling device having a frame adapted to be supported on a car and which in turn supports a bilaterally movable support table. Four double acting hydraulic lift cylinders are mounted on the support table for vertically moving a ... | 03/16/1976 |
| 3938790 | Method and converter for refining pig-iron into steel Pig-iron is refined into steel by blowing oxygen and a protective screen of an encasing gas through injecting means located at or near the bottom of a converter containing a melt of molten metal. The encasing gas while protecting the injecting means, allo... | 02/17/1976 |
| 3934863 | Apparatus for refining molten metal and molten metal refining process Apparatus suitable for injecting fluids, particularly suspensions of solids in gases, below the surface of a molten metal, e.g. in emulsion metallurgy, comprises a converter having a tuyere for injecting the fluid below the surface of the molten metal, an... | 01/27/1976 |
