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| Number | Title | Issue Date |
| 6638337 | Method of introducing additives in steelmaking The additives, in particulate solid form, are conveyed pneumatically in a divergent stream from a pneumatic gun to impinge upon the molten iron and mix therewith. The gun is spaced above a surface of molten iron such that the pneumatically conveyed stream... | 10/28/2003 |
| 6238457 | Method for feeding and directing reaction gas and solids into a smelting furnace and a multiadjustable burner designed for said purpose The invention relates to a method for adjusting the flow velocity of reaction gas and the dispersion air of pulverous solids when feeding reaction gas and finely divided solids to the reaction shaft (6) of a suspension smelting furnace for creating a cont... | 05/29/2001 |
| 5522916 | Method and apparatus for injecting liquid oxygen A high-speed jet of liquid oxygen (21) with a speed higher than 100 meters per second is delivered into the tuyeres of a blast furnace of cupola furnace together with pulverised carbon. The jet reaches the opposite wall of the cavity (9) formed at the out... | 06/04/1996 |
| 5451034 | Device for the injection of pulverized coal into a blast furnace crucible A method and device is provided for the combined injection of pulverized coal and a gaseous oxidant into a crucible of a shaft furnace, especially a blast furnace, through a hot-air blast tuyere. In the region of the nozzle end of the tuyere in the crucib... | 09/19/1995 |
| 5427604 | Alloy material addition method and apparatus for smelting and melting furnaces A method and apparatus for feeding alloy additive and burden materials to the burden in a vertical shaft furnace working volume generally by gravity-feeding the alloy additive to the furnace tuyere for entrainment in the blast media and transfer to the bu... | 06/27/1995 |
| 5350439 | Process and apparatus for the replacement of a first flow of gas accompanying a flow of particles with a second flow of gas A first flow of gas (C) accompanying a flow of solid particles (S), is sent at supersonic speed into a first conduit (1) prolonged by a third conduit (8) and intersecting a second conduit (6) supplying a second flow of gas (G) which is deflected into the ... | 09/27/1994 |
| 5333840 | Blast pipe and tuyere arrangement for a blast furnace and method Fuel and combustion gas are supplied to the blast pipes and tuyeres of a blast furnace through injection lances which have an inner tube and an outer tube. The inner tube is generally used to carry the fuel, while the space formed between the inner and ou... | 08/02/1994 |
| 5227117 | Apparatus for blast furnace fuel injection A blast furnace blowpipe is provided having multipe bosses for a plurality of fuel injection lances spaced around the periphery of the blowpipe.... | 07/13/1993 |
| 5201941 | Process for introducing additive substances which are capable of flow into a metallurgical vessel and a vessel for that process For the metallurgical treatment of a molten metal bath (1) in a metallurgical smelting and refining vessel (3), additive substances (43) which are capable of flow, in particular lime, are supplied in a granular to dust state, at least during a part of the... | 04/13/1993 |
| 5173245 | Tuyere injector An injector for introducing particulate material into the bath of a pyrometallurgical vessel via existing tuyeres. An existing mechanical puncher may be removed and replaced with an injector adapted to be attached to the existing tuyere body so as not to ... | 12/22/1992 |
| 5050848 | Apparatus for post combustion Process and apparatus for post combustion of reaction gases generated in a molten iron bath above the bath by means of at least one jet of oxidizing gases, whereby energy thereby produced is transferred to the bath and whereby the or each jet of oxidizing... | 09/24/1991 |
| 4941913 | Process for heating steel melts as well as device for performing this process In a process for heating within a ladle (5) steel melts (10) being covered with a slag (8) rich in iron oxides, in particular for continuous steel production processes such as, for example, the KVA-process, thereby using metallothermal heat, there is (are... | 07/17/1990 |
| 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 |
| 4767598 | Injection apparatus for introduction of a fluid material into a molten metal bath and associated method An injection apparatus for introducing fluid material, such as a reactive element to a molten metal bath while resisting undesired oxidation. The injection apparatus consists of a body assembly having a chamber defined therein, and inlet and outlet passag... | 08/30/1988 |
| 4666132 | Method and apparatus for the pyrometallurgical treatment of fine grained solids to produce molten products A method and apparatus for the pyrometallurgical treatment of fine grained solids such as non-ferrous metal ore concentrates with an oxygen-containing gas wherein the solids are mixed with the gas to form a suspension which is blown through a nozzle into ... | 05/19/1987 |
| 4661152 | Method of lancing for a copper-producing converter A method of oxygen lancing for a copper-producing converter. An oxygen-enriched gas, such as oxygen-enriched air or pure oxygen, having a gage pressure of at least 1 kg/cm2 is blown onto the surface of a molten bath through at least one top lan... | 04/28/1987 |
| 4518422 | Process and apparatus for refining steel in a metallurgical vessel A process and apparatus for the desulphurization, deoxidation and purification of a metal melt is presented. The process is particularly well suited for use in a ladle during the refining of steel. The present invention comprises means for defining at the... | 05/21/1985 |
| 4422624 | Concentrate burner A burner for smelting metal-bearing sulfide ores or concentrates by means of an oxygen-rich gas is disclosed. The oxygen-rich gas is introduced into a chamber so as to aspirate or eject the metal-bearing sulfide ore or concentrate. The oxygen-rich gas and... | 12/27/1983 |
| 4372540 | Apparatus for oxygen sprinkle smelting of sulfide concentrates A horizontal furnace for converting nonferrous metal sulfide concentrates to a molten matte has a plurality of vertically disposed burners along the longitudinal axis of the furnace roof, the burners spaced from each other, means for introducing oxygen-ri... | 02/08/1983 |
| 4336922 | Continuously tapped cupola furnace A hot-blast cupola furnace 1 has an inclined bottom 3 leading directly to a tapping conduit 4. The conduit 4 leads to a forehearth 5 having an iron discharge siphon 13, 14, 15 and two slag discharge siphons 16, 17. The forehearth 5 has an upper slag-holdi... | 06/29/1982 |
| 4294433 | Pyrometallurgical method and furnace for processing heavy nonferrous metal raw materials A method for processing heavy nonferrous metal raw materials by heating and melting said raw materials in a molten slag with the formation of a heterogeneous melt consisting of a sulfide and an oxide phases. The melt is bubbled oxidized by injecting a gas... | 10/13/1981 |
| 4077614 | Steelmaking apparatus A cold charge of steel scrap is melt cut and melted in an arc furnace provided with special oxygen-fuel burners by which rapid melting is promoted, the interior of the furnace being maintained under negative pressure by a fume evacuation and filtration me... | 03/07/1978 |
| 3997334 | Introduction of a liquid into a receptacle such as a converter A liquid fuel or other liquid is supplied to a supply line which communicates with an injection conduit opening out into a receptacle such as a steelmaking converter. The supply line includes a non-return valve which allows the liquid to pass only when it... | 12/14/1976 |
| 3951390 | Thrust bearing device for metal treating vessel A converter 10 having horizontally exiting trunnion pins which are subject to side loading. A pair of bearings support the trunnion pins for rotation and a thrust bearing assembly is connected to the terminal end of one of the trunnion pins and is mounted... | 04/20/1976 |
| 3948644 | Steel making vessel with dust recycling method and means The flue gases from a steel refining furnace or vessel are delivered to a gas cleaning system in which the dust is removed and collected in slurry form. The slurry is dried and reduced to dust again after which it is delivered to a storage vessel. The dus... | 04/06/1976 |
