| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Method of degassing and decarburizing stainless molten steel | US131894 | 1993-10-05 | US5356456A | 1994-10-18 | Hiroshi Nishikawa; Masanori Nishikohri; Hitoshi Ohsugi |
| A method of degassing and decarburizing molten stainless steel in a vacuum, which molten steel is produced in a steel making furnace. Molten steel is foamed in a vacuum tank. Before foaming the [N] (%) in the molten steel is increased. The foam is produced by denitrification of the steel during vacuum degassing. Oxidizing gas is blown through a top-blow lance onto the surface of the steel in a vacuum tank, causing the reaction C+1/2O.sub.2 .fwdarw.CO to decarbonize the steel. Temperature decrease of the molten steel is resisted by combustion of CO produced by the reaction of C+1/2O.sub.2 .fwdarw.CO. | ||||||
| 102 | Method of melting cold material including iron | US306176 | 1989-02-06 | US4891064A | 1990-01-02 | Kazushige Umezawa; Tatsuro Kuwabara; Tetsuya Oh-hara; Tsuzuru Nuibe; Kousaku Ozawa |
| A method of melting an iron-containing cold material and simultaneously obtaining a low phosphorous and high carbon molten iron while maintaining a high post combustion rate, comprising the steps of: preparing a converter having a lance for top-blowing oxygen, and a bottom-blowing triple pipe nozzle disposed at a bottom of the converter which nozzle is provided with an inner pipe, an intermediate pipe and an outer pipe; supplying the iron-containing cold material into the converter in which a hot heel exists; introducing into the converter all of a carbonaceous material together with a non-oxidizing gas through the inner pipe of the triple pipe nozzle, oxygen through a space defined between the inner pipe and the intermediate pipe, and a non-oxidizing cooling gas through another space defined between the intermediate pipe and the outer pipe, and additional oxygen through the oxygen top-blowing lance so that the cold material is melted into a molten iron under an existence of slag; maintaining both the content of carbon dissolved in the molten iron at a level of 3 to 4% in most of a period of time for the melting and the rate of bottom-blown oxygen in a range of not less than 10% but less than 20% of the total amount of the oxygen; and adding intermittently or successively iron oxide into the slag in most of a melting period of time while keeping a slag basicity defined by CaO/SiO.sub.2 in a range of 1.5 to 3.0. | ||||||
| 103 | Composition and process to create foaming slag cover for molten steel | US612403 | 1984-05-21 | US4528035A | 1985-07-09 | William B. Simpson, Jr.; David F. Lundy; R. L. Parnell; Charles W. Snodgrass; Edward B. Miller; John M. Harvey |
| Slag formed in steel melt operations is foamed to create a protective cover using a composition comprised essentially of calcium oxide. | ||||||
| 104 | Equipment for measurement and control of load material fed into a furnace | US16049875 | 2018-07-31 | US20180347908A1 | 2018-12-06 | Dario Locatelli; Sivio Maria Reali; Paolo Argenta |
| A system and equipment to measure and control the feeding of load material into an electrical arc furnace (EAF) includes an automatic control device feeding the load material; a measuring device positioned between the EAF and the tilting platform that includes an upper plate adapted to slide against the EAF, a lower plate engaged to the tilting platform, and a ring structure therebetween having a peripheral ring wall, a ring plate extending across the ring structure, and a contact member coupled to the ring plate that upperly contacts the upper plate and lowerly approaches, without contacting the lower plate; and one or more sensors measuring a deformation of the ring plate upon application of a load on the upper plate. | ||||||
| 105 | METHOD AND DEVICE FOR DETECTING THE SLAG LEVEL IN A METALLURGICAL VESSEL | US14412833 | 2013-07-03 | US20150192365A1 | 2015-07-09 | Christian Koubek |
| A method and a device for detecting the slag level of a metal melt in a metallurgical vessel (1). At least one signal-generating detecting apparatus (6) is directed at the metallurgical vessel (1) and/or at least at a slag flow (3) out from the metallurgical vessel. In a phase A, a slag level SPA is directly determined from the signals by a processing unit (9). If such direct detection is not possible, the width BMi of the slag (3) flowing out is detected in at least one direction i and the slag level SPB is determined by the processing unit by the amount of slag SM flowing out. This also controls the amount of carbon carriers introduced into the metallurgical vessel to set the slag level. | ||||||
| 106 | METHOD FOR OPERATING A VACUUM MELTING SYSTEM AND VACUUM MELTING SYSTEM OPERATED ACCORDING TO THE METHOD | US14391361 | 2013-03-21 | US20150091223A1 | 2015-04-02 | Thomas Matschullat; Detlef Rieger |
| Metallurgical treatment of a steel melt is provided in a vacuum melting system in which acoustic signals generated in a pan receiving the steel melt are recorded with at least one structure-borne sound pick-up acoustically coupled directly or indirectly to the pan. The acoustic signals are used to determine a variable characterizing the operating state of the vacuum melting system. | ||||||
| 107 | Device and method for feeding metal material into a melting plant | US13513189 | 2010-12-01 | US08925711B2 | 2015-01-06 | Gianpietro Benedetti; Alfredo Poloni |
| Device for feeding metal into melting plant, in particular into melting furnace including hearth and lateral aperture. Device includes means to feed metal terminally associated with a connection conveyor including a loading plane and cooperating with translation and positioning means. Connection conveyor able to assume first position during continuous loading step, wherein its front terminal end is located substantially flush with the furnace internal wall through the aperture, to introduce metal inside the furnace; a second position distanced from the furnace wall during the step of tapping liquid metal from the furnace; and a third position while first loading the furnace, with the furnace switched off, wherein its loading plane front end is inside the furnace volume to be disposed in proximity to the distal internal wall opposite the furnace proximal internal wall, to unload and distribute a charge to cover at least part of the furnace bottom surface. | ||||||
| 108 | BRIQUETTE FOR PRODUCING A FOAMED SLAG EFFECT IN EAF TECHNOLOGY IN STAINLESS STEEL PRODUCTION | US14459527 | 2014-08-14 | US20140352496A1 | 2014-12-04 | Johann Reichel; Lutz Rose |
| Briquette for producing a foamed slag on stainless steel melts in an electric arc furnace, made up of mixtures of individual or multiple substances of following basic components: O2 carrier Dust, sludge or slag with ≧10% FeO/Fe2O3, Dust, sludge or slag with ≧1% Cr2O3, Dust, sludge or slag with ≧1% MnO, Dust, sludge or slag with ≧1% NiO, Scale with ≧10% FeO/Fe2O3, Gas carrier Dust with ≧40% CaCO3, Density adjuster Dust with FeCr, Dust with Fe/low alloy fine scrap, Dust with Cr/ferritic fine scrap, Dust with Ni/austenitic fine scrap, grinding dust, Dust with Mn/ferritic or low alloy fine scrap, Reducing agent Carbon-containing substances ≧90% C, Dust or fine granulate of coke, coal or graphite, Binder Molasses, cement, Ca(OH)2, in each case ≦5% by weight. | ||||||
| 109 | Method for foamed slag generation of a non-corrosive melt in a converter | US13522637 | 2011-01-05 | US08747518B2 | 2014-06-10 | Johann Reichel; Lutz Rose |
| In order to carry out foaming of a slag having a high ratio of chromium oxide having values of often above 20% of a non-corrosive melt in an AOD (Argon Oxygen Decarburization) or MRP (Metallurgical Refining Process) converter or CONARC SSt for stainless steel by adding a foam material, according to the invention a previously defined mixture (5) of a metal oxide, iron carrier, carbon and binding material in the form of pellets or briquettes (4) is introduced into the converter, which reacts in a chemically reducing manner under the slag layer (2) due to the high ambient temperature, wherein gaseous carbon monoxide formed in particular by means of the reduction process of the metal oxide with the carbon within the pellets or briquettes (4) induces the slag foaming with the gas bubbles (7) thereof and wherein the specific density of the pellets or briquettes (4) and the resolve time of the reduction process are selected so that optimal bubble formation in respect of size and duration is achieved. | ||||||
| 110 | Process for preparing a foaming slag former, product and use thereof | US12812927 | 2009-01-15 | US08470067B2 | 2013-06-25 | Evelyne Nguyên; Dirk Van Mechelen; Philippe Descamps |
| Process for preparing a foaming slag former for electric furnaces comprising the steps of aggregating solid slag particles into a coarser granular material and carbonating the solid slag particles to form the foaming slag former. The solid slag particles are preferably aggregated before carbonization, so that the carbonates form a solid matrix binding the particles together. | ||||||
| 111 | METHOD FOR PRODUCING FOAMED SLAG ON HIGH-CHROMIUM MELTS IN AN ELECTRIC FURNACE | US13611671 | 2012-09-12 | US20130000446A1 | 2013-01-03 | Lutz Rose; Johann Reichel |
| The invention relates to a method for producing foamed slag on high-chromium steel melts in an electric furnace, whereby a mixture consisting of a metal oxide and carbon is introduced into the furnace, the metal oxide in the slag is reduced by the carbon, and the gases created in the slag form bubbles which thus foam up the slag. In order to be able to control the gas formation and thus the foaming process, the mixture consisting of a metal oxide and carbon and optionally an iron carrier is introduced as preforms, such as pellets, which are compressed and/or provided with a binding agent. The gas formation can be controlled in terms of location, type and time, by adjusting the characteristics of the pellets, especially the density and/or compression characteristics thereof. | ||||||
| 112 | METHOD OF SETTING A SLAG CONSISTENCY AND APPARATUS FOR CARRYING OUT THE METHOD | US13583926 | 2011-02-07 | US20130000445A1 | 2013-01-03 | Thomas Matschullat |
| In a method and an apparatus for setting a slag consistency in an electric arc furnace, structure-borne sound measurements are carried out on the electric arc furnace during the melting | ||||||
| 113 | DEVICE AND METHOD FOR FEEDING METAL MATERIAL INTO A MELTING PLANT | US13513189 | 2010-12-01 | US20120234649A1 | 2012-09-20 | Gianpietro Benedetti; Alfredo Poloni |
| Device for feeding metal into melting plant, in particular into melting furnace including hearth and lateral aperture. Device includes means to feed metal terminally associated with a connection conveyor including a loading plane and cooperating with translation and positioning means. Connection conveyor able to assume first position during continuous loading step, wherein its front terminal end is located substantially flush with the furnace internal wall through the aperture, to introduce metal inside the furnace; a second position distanced from the furnace wall during the step of tapping liquid metal from the furnace; and a third position while first loading the furnace, with the furnace switched off, wherein its loading plane front end is inside the furnace volume to be disposed in proximity to the distal internal wall opposite the furnace proximal internal wall, to unload and distribute a charge to cover at least part of the furnace bottom surface. | ||||||
| 114 | Method for the production of a foamed slag in a metal bath | US12223416 | 2007-01-15 | US08043402B2 | 2011-10-25 | Johann Reichel; Lutz Rose; Miroslav Karbowniczek |
| A method for producing a foamed slag (1) on a metal bath (2) in a metallurgical furnace (3), in which a mixture (4) containing at least one metal oxide and carbon is introduced into the furnace (3), the metal oxide is reduced by the carbon below the slag (1) that is located there, and the gases produced during the reduction process form bubbles such that the slag is foamed. In order to optimize the formation of foamed slag, the mixture (4) is delivered into the furnace (3) in such a way that a desired height (h) or a desired section of the height (h) of the layer of foamed slag (1) is generated or maintained. | ||||||
| 115 | Method for the reduction of a slag having a high degree of chromium in an electric arc furnace | US12449424 | 2008-01-10 | US08043401B2 | 2011-10-25 | Johann Reichel; Lutz Rose |
| During the production of stainless steel, a slag is formed during the melting of the solid material in the electric arc furnace, the slag having a high degree of metal oxides, particularly chromium oxide. The chromium concentration often reaches values of more than 30%. Currently, such slags cannot be reduced to a desired degree due to their composition. In order to minimize the resulting high loss of recyclable material, the invention provides to charge the electric arc furnace with pellets, or briquettes (8), which are made of a defined mixture of an iron carrier as the ballast material, carbon, or carbon and silicon, as the reducing agent, and a binder, wherein they react beneath the slag layer (7) in the steel melt (6) with the metal oxides of the slag (7), particularly with the chromium oxide present, in a floating, chemical, and reducing manner. The reaction gases (12) produced in the process, which are mainly made of carbon monoxide, advantageously support a foaming of the slag (7). | ||||||
| 116 | PRODUCTION OF FERRO-ALLOYS | US13061452 | 2009-08-28 | US20110239822A1 | 2011-10-06 | Paul Anthony Vielhauer; Paul James O'kane; Jonathan David Dicker; Catherine Louise Skidmore |
| A method for producing a ferro-alloy, such as steel, in an electric arc furnace or other suitable metallurgical furnace is disclosed. The method comprises supplying a mixture of (a) a carbon-containing polymer that is capable of acting as a slag foaming agent and (b) another source of carbon into the furnace during at least a part of a power-on phase of the method. A metallurgical furnace is also disclosed. | ||||||
| 117 | Process to reduce steel furnace slag carry-over during tapping | US12629426 | 2009-12-02 | US07914602B1 | 2011-03-29 | Stewart W. Robinson; Greg Brasel |
| A process for tapping a steel furnace with a reduced amount of entrained slag is disclosed. During tapping, particles of a slag foaming agent are added. The foaming agent may include calcium carbide and/or other chemicals. The agent foams the slag to decrease its density during tapping and/or to disrupt initial vortex formation at the tap. | ||||||
| 118 | Process for Preparing a Foaming Slag Former, Product and Use Thereof | US12812927 | 2009-01-15 | US20110023659A1 | 2011-02-03 | Evelyne Nguyên; Dirk Van Mechelen; Philippe Descamps |
| The present invention relates to a process for preparing a foaming slag former 40 for electric arc furnaces 1, with at least 20 wt. % of solid slag particles, to the product of this process, and to its use in electric arc furnaces 1. The process of the invention comprises the steps of aggregating solid slag particles into a coarser granular material 33 and carbonating them to produce said slag former 40. In a preferred embodiment, said solid slag particles are aggregated before said carbonation, so that the carbonates form a solid matrix binding the particles together. | ||||||
| 119 | Methods of Using Tires and Scrap Rubber in the Manufacture and Melting of Steel and Other Metals | US12719586 | 2010-03-08 | US20100154592A1 | 2010-06-24 | Franklin Leroy Stebbing |
| A method of using scrap rubber and other scrap materials, such as tires or parts or pieces of tires, to manufacture or melt steel and other metals in a furnace is disclosed. The scrap rubber may be used as a carbon source for the manufacture of steel and other metals, and may be used as an energy source to melt the scrap metal used to make the steel and other metals. The net benefit of this method includes reducing the amount of scrap rubber, such as tires, to be sent to a waste disposal facility or landfill, thereby improving the environment. In addition, by increasing the use of scrap rubber as a source of energy for steel or metal production, less energy is required from other sources. | ||||||
| 120 | Production of Ferro-Alloys | US12596772 | 2008-05-07 | US20100147108A1 | 2010-06-17 | Veena Sahajwalla |
| A method for producing a Ferro-alloy in an electric arc furnace is disclosed. The method comprises the steps of removing steel from a carbon-containing organic material, and charging the furnace with the carbon-containing organic material product. | ||||||
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