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| Number | Title | Issue Date |
| 6989126 | Supplying solid feed materials for a direct smelting process A process and apparatus for supplying solid feed materials for a direct smelting process to solids injection lances of a direct smelting vessel is disclosed. The feed materials supply apparatus includes a supply line (L) for conveying iron-containing material and so... | 01/24/2006 |
| 6923843 | Method for oxygen injection in metallurgical process requiring variable oxygen feed rate A method of processing molten metal by the injection of oxygen through a water cooled supersonic oxygen injection lance. In the first step of the process, oxygen is injected through the injection lance at an initial flowrate to the process which is the optimal flowr... | 08/02/2005 |
| 6383253 | Method for alloying steels and device for carrying out the method Alloying and/or reducing powder is pumped directly into the steel melt at a pressure of at least 20 bar, preferably at least 40 bar, with at most 20% of a fluidizing agent and the powder is discharged from the delivery line by a plunger extending across t... | 05/07/2002 |
| 5516356 | Process and apparatus for feeding a second stream of pulverulent materials into a pneumatic conveying line carrying a first controllable flow of pulverulent materials A process for feeding a second stream of pulverulent materials into a pneumatic conveying line carrying a first controllable flow of pulverulent materials is presented. The second stream of pulverulent materials is fed at a controlled rate and the control... | 05/14/1996 |
| 5447550 | Method and apparatus for the pneumatic transport of iron-bearing particles Methods and systems are provided for controlling the pneumatic transport of friable particulate solid material through a transport pipe by means of a carrier gas circulating in a loop comprising the transport pipe and a carrier gas recycle conduit. A valu... | 09/05/1995 |
| 5229063 | Process for the treatment of steel-mill slag and apparatus for carrying it out The present invention provides a new process and a new apparatus for the treatment of steel-mill slag in a vessel which allows a wet granulation of the slag without the risk of explosions. The slag is caused to flow through a taphole at the bottom of the ... | 07/20/1993 |
| 5221512 | Apparatus for preheating and removing organic materials from scrap iron This method of preheating scrap iron mixed with plastic, rubber and resinous, i.e. organic, materials and intended for electric furnaces, in particular electric arc furnaces, is characterized by transforming the plastic, rubbery or resinous and like mater... | 06/22/1993 |
| 5188661 | Dual port lance and method A apparatus is disclosed which is utilized for treatment of molten metal contained in a vessel by injection of powdered reagent below the surface of the molten metal which includes an elongated lance body containing longitudinal conduits for delivery of t... | 02/23/1993 |
| 4891062 | Method for operating and melt-down gasifier having water-cooled nozzles for oxygen and means for monitoring water and oxygen Described is a method for operating a melt-down gasifier(4) in which iron-ore-containing charge materials or iron sponge obtained from same by direct reduction are smelted due to the addition of carbon carriers and blowing an oxygen-containing gas through... | 01/02/1990 |
| 4746101 | Induction hardening of gear teeth There is disclosed a process and apparatus for induction hardening of the flank, root and tip surfaces of the teeth of a gear so as to provide surface-hardened layer along said surfaces. An electrically energizable inductor head carries out traversing mov... | 05/24/1988 |
| 4693863 | Process and apparatus to simultaneously consolidate and reduce metal powders A powder metallurgy consolidation process and apparatus for carrying out said process produces integral metal bodies by heating metal powder of a predetermined composition to a temperature sufficient to cause solid state interparticle bonding, while simul... | 09/15/1987 |
| 4613113 | Apparatus for blowing powdery refining agent into refining vessel Disclosed herein is an apparatus for blowing a powdery refining agent into a refining vessel which is adapted to blow the powder into a molten metal bath of the refining vessel together with a refining gas by feeding the powder from a pressure vessel to a... | 09/23/1986 |
| 4519587 | Apparatus for regulating the delivery of solid materials by a blowing lance An apparatus and process for rapidly injecting or blowing solid combustible material into a metal pool is presented. In a preferred embodiment, the apparatus essentially comprises at least one nonoxidizing compressed gas source, a circuit which supplies g... | 05/28/1985 |
| 4436289 | Method and apparatus for controlling the atmosphere in a carburizing furnace utilizing a cascaded valving system An automatic control for a multi-zone push type carburizing furnace capable of controlling the flow of either an endothermic gas atmosphere or a nitrogen methanol atmosphere at both high and low flow rates and during normal and suspend carburizing utilize... | 03/13/1984 |
| 4358092 | Exothermic reaction, system for supplying a reactant gas and a shielding fluid to a reactor, and control signal generating circuit for use in said system An exothermic reactor has a refractory lining and a plurality of annular nozzles mounted in said lining. Each nozzle has an inner reactant gas passage and an annular shielding fluid passage surrounding said reactant gas passage. A reactant gas is supplied... | 11/09/1982 |
| 4279406 | Plant for generating an atmosphere for the heat treatment of metals This invention relates to the generation of an atmosphere for the heat treatment of metals, incorporating an alcohol of the methanol type that decomposes by cracking. A generating plant comprises a nitrogen circuit connected to a pressure source, an alcoh... | 07/21/1981 |
| 4136857 | Method and apparatus for automatically controlling the rate of flux injection to a converter Flux is injected into the oxygen stream being fed to the tuyeres of a steel-refining converter, such as a Q-BOP converter or the like, and the rate of injection is controlled by varying the size of the outlet orifice of the flux-containing tank. The tank ... | 01/30/1979 |
| 4127259 | Apparatus for controlling the injection of oil into a blast furnace An instrument for measuring the blast air volume within a blast tuyere is connected to a ratio controller which controls the opening and closing of oil and water valves in proportion to one another. A servomotor connects the ratio controller to the oil an... | 11/28/1978 |
| 4000885 | Cupola furnace waste gas recuperative system and method for operating same An improved cupola furnace waste gas recuperative system and method for collecting waste furnace gases, cleaning them for the purpose of safely burning same either in a recuperator-heat exchanger for preheating incoming furnace blast air or for other heat... | 01/04/1977 |
| 3999977 | Method for controlling the injection of flux into a steelmaking vessel as a function of pressure differential This invention is directed to a method and apparatus for controlling the injection of flux into a steelmaking vessel as a function of the differential pressure between the flux containing tank and the main conduit which supplies oxygen to the tuyeres of t... | 12/28/1976 |
