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| Number | Title | Issue Date |
| 7931732 | Method and apparatus for carrying out a metallurgical process A metallurgical process involves providing an ingredient enclosure and placing a plurality of granules of a first material in the ingredient enclosure. The first material contains a first ingredient in a metallurgical process. A metallurgical process furnace having ... | 04/26/2011 |
| 7736415 | Rotary lance A process and apparatus for feeding an additive to a molten metal in a vessel to achieve a uniform dispersion of the additive are provided. In one example, the outlet of the lance is positioned below the surface of the molten metal. The lance is moved with a recipro... | 06/15/2010 |
| 7682418 | Cored wire injection process in steel melts The present invention provides a cored wire injection process for introducing fluxes and alloying additives in liquid steel bath. The bath temperature and chemistry of the liquid steel is adjusted according to requirements in a secondary treatment unit. The additive... | 03/23/2010 |
| 7591875 | Alloying fine adjustment method The present invention discloses a type of alloying fine adjustment method in which alloy materials are pulverized into micropowder and fed via the conventional powder spraying system; the said alloy materials are fed into the upper part of the spraying tank of the s... | 09/22/2009 |
| 6921497 | Composition of matter tailoring: system I The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character. ... | 07/26/2005 |
| 6866696 | Additive for production of irons and steels A technique for producing iron utilizes agglomerations, such as briquettes or tablets, or powders, that include a sulfur-containing material such as iron sulfide, and and oxygen containing material such as iron oxide. The agglomerations or powders are substantially ... | 03/15/2005 |
| 6793707 | Inoculation filter A method for inoculating molten iron. The method comprises passing the molten iron through a filter assembly at an approach velocity of about 1 to about 60 cm/sec. The filter assembly comprises a filter element and an inoculation pellet in contact with the filter el... | 09/21/2004 |
| 6508857 | Method for treating molten metal with cored wire A cored wire consisting of an inner calcium wire surrounded by an aluminum sheath forming a composite core which in turn is encased in a steel jacket. The cored wire is formed continuously by covering an extruded calcium wire with aluminum then inserting ... | 01/21/2003 |
| 6346135 | Cored wire for treating molten metal A cored wire consisting of an inner calcium wire surrounded by an aluminum sheath forming a composite core which in turn is encased in a steel jacket. The cored wire is formed continuously by covering an extruded calcium wire with aluminum then inserting ... | 02/12/2002 |
| 5572544 | Electric arc furnace post combustion method A method for carrying out post combustion in an electric arc furnace comprising forming a preferential gas stream within the electric arc furnace, concentrating carbon monoxide within the gas stream, and providing post combustion oxygen into the gas strea... | 11/05/1996 |
| 5456452 | Apparatus for making steel alloys in a tundish A method and apparatus are provided for making steel alloys directly in a tundish. Base steel enters the tundish from a ladle. An alloying chamber having a plurality of inlets is positioned above a tundish drain. An alloying material (for example, a wire ... | 10/10/1995 |
| 5352271 | Composite wire with a plastic sheath for additions to metallic baths A method for producing a composite wire for addition of solid products to metal baths in which the core comprises the addition products and a sheath of plastic material covers the core. The wire is produced by a coextrusion of the core and the sheath. The... | 10/04/1994 |
| 5094432 | Container for adding light metal to an aluminium alloy in the liquid state A container for adding to a liquid metal of known density and melting point an additive metal of lower density. The container comprises a tube portion of defined cross-section formed of a metal having a melting point higher than the melting point of the l... | 03/10/1992 |
| 4970051 | Process for the introduction of nitrogen into cast iron The present invention provides an agent for the introduction of nitrogen into cast iron, wherein it contains or consists of at least 50% by weight of at least one nitrogen-containing compound with an N--C--N structure and/or a mixture of calcium cyanamide... | 11/13/1990 |
| 4956010 | Method of desulphurizing pig-iron The method concerns the desulphurization of cast iron produced by a blast furnace, before it is converted to steel. In a first phase of the process the cast iron is treated with a desulphurizing compound such as Na2 CO3. A very long compo... | 09/11/1990 |
| 4944798 | Method of manufacturing clean steel The disclosed method is a method of manufacturing clean steel comprising refining molten steel by adding additives of from not more than 0.5% to more than 0.001% by weight of molten steel to the molten steel bath, in vacuo or a non-oxidizing atmosphere wi... | 07/31/1990 |
| 4900357 | Injection of substances into high temperature liquids Gas injection into a metal melt, accompanied if desired by powdered or solid treatment substances, is by way of a nozzle inserted into the wall of a melt-containing vessel. The nozzle bore initially has a stopper at its inner end and a delivery pipe small... | 02/13/1990 |
| 4897114 | Nitrogen-containing additive for steel melts The present invention provides a nitrogen-containing additive for steel melts based on calcium cyanamide, wherein it is in the form of a cored wire consisting of a metallic sheath and finely-divided calcium cyanamide as filling material.... | 01/30/1990 |
| 4892580 | Lead-containing additive for steel melts The present invention provides a lead-containing additive for steel melts, wherein it is in the form of a cored wire consisting of a metallic sheath and finely-divided filling material, the finely-divided filling material consisting of (a) metallic lead a... | 01/09/1990 |
| 4881972 | Process for feeding heat energy into a molten metal bath Solid carbon and solid metal materials, preferably scrap, which are to be melted, are introduced into a crucible which accommodates a molten metal bath, and oxygen is blown into the molten metal through nozzles or lances. Better utilisation of the carbon ... | 11/21/1989 |
| 4875934 | Method of deoxidizing molten ferrous metals The present invention discloses a method for efficient aluminum deoxidation of ferrous melts, generally comprising preparation of a deoxidizing agent having a discrete layer of aluminum surrounding a ferrous core, and introducing the prepared deoxidizing ... | 10/24/1989 |
| 4874576 | Method of producing nodular cast iron In a process of producing nodular cast iron wherein molten cast iron is treated in two stages with elements for inducing a formation of a predominantly nodular graphite, the crystallization of the graphite and the dynamic properties of the casting are imp... | 10/17/1989 |
| 4832742 | Flexible refining-agent clad wire for refining molten iron group metal The disclosed flexible refining agent clad wire comprises a core wire made of refining agent for iron, steel or the like metal, which core wire is clad with a metallic sheath that is made of iron or aluminum, and grooves are formed at certain intervals on... | 05/23/1989 |
| 4773929 | Method of and device for the simultaneous heating and refining of a metal bath Heat and melt-refining reactants are simultaneously delivered to a metal melt by introducing into the melt a filled wire comprising a metal sheath and a mixture of an oxygen supplier and a metal oxygen acceptor capable of undergoing exothermic reaction to... | 09/27/1988 |
| 4765599 | Apparatus for the automatic forming of continuous metal tube filled with powdered materials, its direct introduction into liquid metal, and related equipment An apparatus suitable for forming a metal tube filled with powders for the treatment of a liquid metal bath is disclosed. The apparatus includes a feeding unit provided with rollers capable of unrolling a metal sheet from a roll and advancing it into a fi... | 08/23/1988 |
| 4761178 | Process for heating molten steel contained in a ladle The temperature of molten steel in a ladle is raised to a predetermined level by introducing a plurality of oxygen containing gas streams beneath the surface of molten steel and introducing a predetermined quantity of an oxidizable fuel, such as aluminum ... | 08/02/1988 |
| 4746360 | Iron alloys, process and apparatus for introducing highly reactive metals into molten metal and process and product for removing impurities from molten metal A process for removing impurities from molten metal by propelling a bullet toward and into the molten metal at a velocity sufficient for the bullet to penetrate, vaporize, and react with the impurities. The bullet contains a reactive substance, is heavier... | 05/24/1988 |
| 4741772 | Si contained ferroalloy addition as a weak pre-deoxidation process in steelmaking The present invention relates to a Weak Pre-Deoxidation Process (abbreviated as W.P.D. process) for producing Al-killed and/or Ti-Killed steel. In this process the proper amount of Si-containing ferro-alloy is added into molten steel during tapping, as We... | 05/03/1988 |
| 4711663 | Process for the automatic forming of continuous metal tube filled with powdered materials, its direct introduction in to liquid metal, and related equipment Process for the continuous forming of a metal tube filled with powdered elements, such as ferroalloys and other materials, utilizable in the treatment of liquid metals in ladle at same time of its forming, consisting in making advance a metal sheet (2) un... | 12/08/1987 |
| 4705261 | Wire injection nozzle An injection nozzle for the addition of an agent in wire form directly into the interior of a molten material includes a tip having an axial bore with a terminal opening through which the wire exits the nozzle, the terminal opening having a cross section ... | 11/10/1987 |
| 4701215 | Apparatus for introducing substances into liquids e.g. metal melts For introducing gases, wires and powders to metal melts, a multi-ducted refractory body (11) is installed in the wall (14) of a vessel (15) for the melt. The body has passage closing elements (24, 34, 35) preventing melt entering the passages (A, B, C). T... | 10/20/1987 |
| 4698095 | Composite calcium clads for treating molten iron Composite calcium materials to be used for welding or refining steel, nickel, nickel alloy or iron alloy, which are produced by cladding a sheath of aluminum, iron or alloys thereof and a core consisting of (1) a mixture or an alloy of calcium or an alloy ther... | 10/06/1987 |
| 4652299 | Process for treating metals and alloys for the purpose of refining them The refining additive is an alloy in the form of granules of a metal selected from the group of alkaline earth metals and zinc with a small quantity of a metallic element capable of giving the alloy a substantially lower melting point. The alloy can be a ... | 03/24/1987 |
| 4630801 | Apparatus for adding solid alloying ingredients to molten metal stream An elongated, vertical conduit has an upper end, communicating with the bottom opening in an upper container or ladle, and an open lower end disposed above the top surface of a bath of molten metal in a lower container or tundish. A descending stream of m... | 12/23/1986 |
| 4580768 | Device for feeding metal into a molten metal bath A process for feeding metal to molten metal, in particular for the purpose of melting solid metal such as scrap metal or dross granules, is such that at least part of the melt is divided and each divided part set into motion rotating in opposite direction... | 04/08/1986 |
| 4564390 | Decarburizing a metal or metal alloy melt A process is disclosed for reducing the carbon content of a melt of metal or metal alloy, carbon, and at least one strong oxide forming metallic alloying element from an initial value of about 0.1 wt % carbon to a final value of not less than about 0.003 ... | 01/14/1986 |
| 4531972 | Method for the fabrication of steels with high machinability The invention relates to the methods for the preparation of steels with high machinability, comprising globular inclusions which allow for high cutting speeds by means of carbide tools. The method according to the invention consists of introducing into a liqui... | 07/30/1985 |
| 4517019 | Method for continuously treating molten metal Method and apparatus for continuously treating a mass of molten metal with a determinate treating agent, wherein the treating agent is continuously introduced in a treating vessel through a supply passage formed through the wall of the vessel while the mo... | 05/14/1985 |
| 4515630 | Process of continuously treating an alloy melt A process for continuously treating a ferrous or non-ferrous alloy melt is disclosed. The melt is transferred through a plurality of interconnected zones. The carbon content of the melt is lowered in a first treatment zone. Then, the residual oxygen conte... | 05/07/1985 |
| 4512800 | Wire injection apparatus An apparatus for adding wire-form processing elements directly into a molten material, comprising: a heat resistant nozzle positionable relative to the surface of the molten material such that an inlet is disposed above the surface and an outlet is dispos... | 04/23/1985 |
