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| Number | Title | Issue Date |
| 7645319 | Method for renovating a combined blast furnace and air/gas separation unit system The invention relates to a method for renovating a combined system consisting of a blast furnace supplied with an oxidant fluid received at least partly from an air/gas separation unit (ASU). The method consists in injecting, before renovation, at least 50% of the f... | 01/12/2010 |
| 6973116 | Method and device for equalizing the pressures in the melting chamber and the cooling water system of a special melting unit The invention relates to a method and a device for equalizing the pressures in the melting chamber and in the cooling water system of a special melting unit, for example a pressure electroslag remelting (PESR) unit having a copper ingot mold, or a pressure induction... | 12/06/2005 |
| 6790254 | Method for controlling and adjusting the concentration of a gas component in a melt and a device for carrying out the same The invention relates to a method for producing a metal alloy, in which in a vessel at overpressure a certain desired content of an alloying constituent, which is gaseous in its normal state, is fed to said metal alloy. The method is designed such that precise addit... | 09/14/2004 |
| 6736876 | Fluidized bed breakage prevention system for fluidized bed reduction reactor and method A fluidized bed reduction reactor (100) for supplying a reduced iron to a melter-gasifier (1) of a smelting reduction system includes an exhaust gas supply unit (3) for supplying an exhaust gas to a reduction gas supply tube (4) interconn... | 05/18/2004 |
| 6228142 | Apparatus for keeping optimal penetration depth formed at front end of oxygen tuyere and method for keeping the same An apparatus for keeping an optimal penetration depth formed at the front end of an oxygen tuyere in the producing facilities of molten pig iron utilizing non-coking coal and a method for keeping the same. A sensor for measuring distance using a laser for... | 05/08/2001 |
| 6187076 | Fluidized bed reduction method, fluidized bed reduction reactor, and fluidized bed reduction system A fluidized bed reduction method in which powder raw material, including powder ore or partially pre-reduced powder ore, forms a fluidized bed with, and is sequentially reduced by reducing gas while being moved between a plurality of fluidized bed chamber... | 02/13/2001 |
| 5917114 | Degassing of liquid aluminum and other metals Offgas recycling processes, including an argon degassing embodiment which cyclically regenerates one treatment flow path while the other treatment flow path is treating the offgas. The system is changed into a second mode to regenerate the previously trea... | 06/29/1999 |
| 5759231 | Method for processing metal chips and/or metal dust A method for processing metal chips and/or metal dust, including a first process step in which the metal is moistened and fed by a conveyor system to a collecting tank, especially a settling tank. In further process steps the material being processed pass... | 06/02/1998 |
| 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 |
| 5183495 | Method for controlling a flow rate of gas for prereducing ore and apparatus therefor A method for controlling a flow rate of gas for prereducing ore comprises the steps of prereducing ore in a prereduction furnace having a fluidized bed with a gas generated in a smelting reduction furnace and controlling a pressure of gas generated in the... | 02/02/1993 |
| 4732607 | Method of controlling the stirring strength and flow rate of a jet of gas blown through a lance onto a molten metal surface A method of controlling independently of each other the stirring strength of a jet of oxygen gas and the flow rate of the oxygen gas to be blown onto a molten metal bath in a top-blowing oxygen furnace is disclosed. The method comprises providing an oxyge... | 03/22/1988 |
| 4420334 | Method for controlling the bottom-blowing gas in top-and-bottom blown converter steel making A method is provided for alternately changing the bottom-blowing gas between an oxidizing gas and an inert gas in top-and-bottom blown converter steel making. The bottom-blowing gas is changed to the oxidizing as when the blowing gas pressure rises to a c... | 12/13/1983 |
| 4410355 | Process for controlling a pelletizing plant for fine-grained ores Process for monitoring a pelletizing plant for fine-grained ores, in which the humidity content of the green pellets is adjusted by adding water with consideration of the humidity content of the fine ores and humidified ores, together with optional additi... | 10/18/1983 |
| 4211555 | Method of controlling combustion in a metal melting furnace Disclosed is a method of treating the components of a gaseous fuel mixture to obtain a predetermined mass ratio of the gaseous components for use in metallurgical melting furnace. Two streams of gaseous fuel components are temperature equalized in a heat ... | 07/08/1980 |
| 4148629 | Process for controlling a steel refining process for steels having a carbon content within the range of 0.1 to 0.8 % by weight Process for controlling a steel refining process for steels having a carbon content within the range of 0.1-0.8 percent by weight, in which the desired final carbon content of the metal bath and the final temperature of the metal bath at the end point of ... | 04/10/1979 |
| 4047937 | Method for controlling the operation of a steel refining converter A method for controlling the operation of a steel refining converter of the type having bottom tuyeres, each tuyere consisting of a center jet surrounded by annulus jets is disclosed. Controls are provided for blowing oxygen through the center jets and a ... | 09/13/1977 |
| 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 |
| 3970446 | Method of refining an iron base melt A method of oxygen refining molten hot metal to steel by blowing an oxygen stream at a predetermined flow rate from an oxygen supply source having a pressure from about 12 to about 18 atmospheres through the molten hot metal from a tuyere located beneath ... | 07/20/1976 |
| 3938363 | Forming metal plate A metal forming method comprising the steps of heating of metal plate to a temperature below the temperature at which grain boundary melting occurs, placing the plate on a bottom refractory-compound die of temperature lower than plate temperature, lowerin... | 02/17/1976 |
