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| Number | Title | Issue Date |
| 7282171 | Method for oxy-fuel combustion An oxygen fueled combustion system includes a furnace having at least one burner, an oxygen supply for supplying oxygen having a predetermined purity, and a carbon based fuel supply for supplying a carbon based fuel. The oxygen and the carbon based fuel are fed into... | 10/16/2007 |
| 7203605 | Flow sensing in multiple conduits A method of obtaining a plurality of measures of quantity of a substance flowing through a respective plurality of conduits is disclosed, wherein each of the conduits is supplied from an upstream common source location. An improved series of measurements are derived... | 04/10/2007 |
| 7073353 | Production of mineral wool The invention relates to a method for producing mineral wool, whereby a cracking catalyst having an aluminum oxide content of at least 35% by weight is used as a base material or aggregate. Said catalyst materials produce waste products which are difficult to elimin... | 07/11/2006 |
| 7049540 | Process and apparatus for cutting or welding a workpiece A metal jet cutting system, which includes a jetting heat, a heater and a power source, is used for modifying a workpiece. The jetting head includes a crucible and an inlet for receiving a feed stock of a conductive material. The heater melts the conductive material... | 05/23/2006 |
| 6805724 | Method for particulate introduction for metal furnaces A method and an apparatus for advantageously introducing a flame, a high velocity oxidizing gas, and a high velocity particulate flow into a furnace for metal melting, refining and processing, for example, steel making in an electric arc furnace. The steel making pr... | 10/19/2004 |
| 6635096 | Method for optimizing the operating conditions of a submerged arc furnace A method for producing molten metal by the reduction and melting of raw materials in a submerged arc type electric furnace includes at least one electrode, where substantial amounts of slag are generated so that the electric furnace contains a bath of mol... | 10/21/2003 |
| 6372010 | Method for metal melting, refining and processing An improved method and apparatus for metal melting, refining and processing, particularly adapted to steel making in an electric arc furnace. The method provides auxiliary thermal energy to the steel making process, particulate injection for the formation... | 04/16/2002 |
| 6342086 | Method and apparatus for improved EAF steelmaking An improved method and apparatus for EAF steelmaking wherein the method provides additional thermal energy to the steel making process, carbon injection for the formation of foamy slag, and oxygen injection for the decarburization of the melt, the formati... | 01/29/2002 |
| 6176894 | Supersonic coherent gas jet for providing gas into a liquid A system for establishing and maintaining a supersonic coherent gas jet, effective with either an oxidizing or an inert gas, employing a converging/diverging nozzle for establishment of a non-disruptive initial supersonic velocity, and a slower moving def... | 01/23/2001 |
| 6165247 | Methods for producing platinum powders Platinum powders and methods for producing platinum powders. The powders preferably have a small particle size, narrow size distribution and a spherical morphology. The method includes forming the particles by a spray pyrolysis technique. The invention al... | 12/26/2000 |
| 5980607 | Steelmaking method with oxygen from rectification of air A method of supplying both an oxygen steelmaking process and an ironmaking process with oxygen. The oxygen is separated from air by rectification of the air. A first stream of oxygen from the rectification to the steelmaking process. A second stream of ox... | 11/09/1999 |
| 5925165 | Process and apparatus for the 3-stage treatment of solid residues from refuse incineration plants In a method for processing solid residues from refuse incineration plants the slag is melted and heavy metals from the melt (16) are separated for reutilization. The slag is directly transferred from the refuse incineration plant into a first heating cham... | 07/20/1999 |
| 5902372 | Process and apparatus for processing a shredder light fraction in a melt A process and apparatus for processing a shredder light fraction including multi-duct nozzle having at least an end section positionable within a metallurgical vessel containing a molten metal bath. The shredder light fraction may be fed into the molten m... | 05/11/1999 |
| 5700308 | Method for enhancing reaction rates in metals refining extraction, and recycling operations involving melts containing ionic species such as slags, mattes, fluxes A method and apparatus for enhancing reaction rates between ionic species such as slags, mattes, fluxes and the like with at least another component such as similar melts, metals, chemical compounds, gases or any combination thereof during metal processin... | 12/23/1997 |
| 5500870 | Process and device for the extraction of valuable substances A process and melting furnace unit are provided for extracting valuable substances by reducing oxygen-bound metals which process includes exposing a charge in a first reaction zone of a furnace vessel to heat energy so that a liquid slag floats on a metal... | 03/19/1996 |
| 5286441 | Silver-metal oxide composite material and process for producing the same A silver-metal oxide composite material comprising a silver matrix, (a) from 1 to 20% by weight, in terms of elemental metal, of an oxide of at least one element selected from the group consisting of Sn, Cd, Zn and In and, optionally, (b) an oxide of Mg, ... | 02/15/1994 |
| 5177763 | Furnace bottom structure of direct current electric furnace A furnace bottom structure of a direct current electric furnace has at least one furnace bottom electrode and at least one gas injection tuyere provided in the furnace bottom refractory of the direct current electric furnace. Preferably, the furnace botto... | 01/05/1993 |
| 4762694 | Molten salt extraction process for the recovery of valued transition metals from land-based and deep-sea minerals A process for extracting transition metals and particularly cobalt and manganese together with iron, copper and nickel from low grade ores (including ocean-floor nodules) by converting the metal oxides or other compositions to chlorides in a molten salt, ... | 08/09/1988 |
| 4514223 | Continuous direct process of lead smelting There is disclosed a continuous direct process of lead smelting comprising a step of blowing a compounded feedstock by means of an oxygen-enriched air or oxygen into a smelting zone containing a molten lead bath with a blast pressure by which the compound... | 04/30/1985 |
| 4514217 | Method of producing lead from sulphidic lead raw-material The invention relates to a method for producing lead from sulphidic lead raw-materials by direct smelting processes of the kind in which the lead raw-materials are smelted autogenously in a shaft with the aid of oxygen gas, or air enriched in oxygen, opti... | 04/30/1985 |
| 4504308 | Method of operating a metallurgical plant There is disclosed a method of operating a metallurgical plant including a metallurgical vessel through the ceiling of which one or several hollow electrode(s) are guided in whose cavity a supply pipe is liftably and lowerably moveable. The plant may be o... | 03/12/1985 |
| 4465512 | Procedure for producing lead bullion from sulphide concentrate A procedure based on suspension smelting has been developed for producing lead bullion from sulphidic concentrates in which the proportion of iron and of slag-forming substances is low. In the procedure oxygen or oxygen-enriched air is used. The slag cont... | 08/14/1984 |
| 4455165 | Increasing blast temperature In a method of utilizing a plasma generator to increase the blast temperature in a shaft furnace for melting and possible reduction of metals and/or metal oxides, the thermal energy produced in the plasma generator is transferred, in order essentially to ... | 06/19/1984 |
| 4247087 | Furnace installation for the pyrometallurgical treatment of fine-grained ore concentrates A furnace assembly for the pyrometallurgical treatment of fine-grained ore concentrates including a housing in which there is located a reactor for reacting an ore concentrate and an oxygen-rich gas admitted thereto, the housing further having means there... | 01/27/1981 |
| 4211556 | Reverberatory smelting of non-ferrous metal sulfide ores Banks of a green non-ferrous metal sulfide ore are formed along the inner surfaces of sidewalls of a reverberatory furnace of green-charge type and are melted thereby to form slag and matte, a major portion of the matte being tapped out of the furnace, wh... | 07/08/1980 |
| 4150975 | Process for producing metallic chromium Disclosed is a process for producing metallic chromium from a chromium- and iron-containing ore. First, the chromium- and iron-containing ore is subjected to carbon reduction to obtain a ferro-chrome; secondly, the ferro-chrome is treated with a chlorinat... | 04/24/1979 |
| 4144055 | Method of producing blister copper A method of producing blister copper comprising smelting sulphidic copper raw material in a rotary furnace with an inclined rotation axis, in presence of oxygen and slag formers charged simultaneously with the copper raw material. The method comprises dis... | 03/13/1979 |
| 4108639 | Process for recovering platinum group metals from ores also containing nickel, copper and iron A process is described for the separation of platinum group metals (PGM) from ores also containing iron, nickel and copper as sulfides. The minerals in the ore are first concentrated by flotation and the ore concentrate is melted in an electric furnace to... | 08/22/1978 |
| 4072502 | Method apparatus for increasing blast gas temperature in a shaft furnace A method and apparatus for increasing blast gas temperature in a shaft furnace by passing at least part of the blast gas through a plasma burner, and also supplying additional fuel to the furnace at the tuyere level.... | 02/07/1978 |
| 4029495 | Process for recovering a heavy metal catalyst component from a spent catalyst A supported catalyst contaminated with organic impurities or a mixture of such a catalyst and a flux is introduced into a rotary furnace, rocking furnace or gradient furnace and agitated and heated therein until sintered or transformed into a semi-melted ... | 06/14/1977 |
| 3988421 | Gas cleaning process and equipment A process and an apparatus for the cleaning of combustible gases, particularly gases emitted in steel making plants, in which the gases are passed through a collecting duct together with additional air at conditions such as to cause the combustion of the ... | 10/26/1976 |
| 3964898 | Process for batch production of sponge iron Sponge iron is produced by a process including a charging step during which an iron oxide is arranged as a stationary bed in a furnace chamber, a heating step during which a hot, preferably non-reducing atmosphere is cased to flow through the stationary b... | 06/22/1976 |
| 3951643 | Steel production method An electric arc furnace pivotable between a first position wherein a gas delivery tuyere system is above the level of a metal charge for preheating the same and a second position wherein the tuyere system is below the level of metal charge to permit the i... | 04/20/1976 |
