| Patents for C21C 7 - Treating molten ferrous alloys, e.g. steel, not covered by groups (11,430) |
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| 11/25/1997 | US5690753 Steel containing super-finely dispersed oxide system inclusions |
| 11/25/1997 | US5690161 Process for treating molten metal during a casting operation using a filter and filter for implementing the process |
| 11/20/1997 | DE19641383C1 Production of steel material for producing high grade steel |
| 11/19/1997 | CN1165541A Process for vacuum refining of molten steel |
| 11/19/1997 | CN1165540A Chromium ore smelting redution process |
| 11/12/1997 | CN1164873A Process for vacuum refining of molten steel and apparatus therefor |
| 11/06/1997 | WO1997041270A1 Multipurpose lance |
| 11/06/1997 | CA2252637A1 Multipurpose lance |
| 11/05/1997 | EP0805217A2 Oxygen steelmaking |
| 11/04/1997 | US5683653 Systems for recycling overspray powder during spray forming |
| 11/04/1997 | US5683652 Process for reducing dust emissions of a blast furnace |
| 10/29/1997 | EP0803579A1 Process for the vacuum refining of metal and associated device |
| 10/16/1997 | WO1997038142A1 Desulphurising calcium carbide blend |
| 10/08/1997 | EP0799899A1 Chromium ore smelting reduction process |
| 10/07/1997 | US5674309 Diameter of the gas injector and position relative to the container opening and an interior sidewall produces a gas jet with a reynold's number less than 14,000 |
| 10/02/1997 | WO1997036010A1 Process for producing aluminum-killed steel free of cluster |
| 10/02/1997 | CA2220272A1 Method of producing cluster-free al-killed steel |
| 09/24/1997 | CN1160087A Rare-earth-Al-Mn alloy |
| 09/18/1997 | WO1997028285A3 Producing stainless steels in parallel operated vessels |
| 09/17/1997 | EP0795037A1 Method and equipment for treatment in molten cast iron baths with reaction materials having a low or high production of gas |
| 09/17/1997 | CN1035891C Ingot slab used as refractory shaped-steel material containing oxide and process for rolling shaped-steel using said ingot slab |
| 09/10/1997 | EP0793731A1 Process and apparatus for the manufacture of steel from iron carbide |
| 09/03/1997 | EP0792942A1 Steel, steel sheet having excellent workability and method of producing the same by electric furnace-vacuum degassing process |
| 09/03/1997 | EP0792939A1 Method of melting tinned iron scrap |
| 09/03/1997 | EP0792378A1 Process and device for blowing oxygen-containing gas with and without solid material on a metal melt in a metallurgical vessel, especially an rh vessel |
| 09/03/1997 | EP0723487B1 Method of adjusting the composition of a molten metal such as steel, and plant for implementation thereof |
| 09/03/1997 | CN1158359A Sweetening agent for cast iron smelting |
| 09/03/1997 | CN1035779C Shape steel material having high strength, high toughness and excellent fire resistance and process for producing rolled shape steel of said material |
| 08/28/1997 | WO1997018335A3 Fireproof moulding plates with gas ducts |
| 08/27/1997 | CN1157858A Method for producing ultra low-carbon duriron |
| 08/27/1997 | CN1035728C Method for producing particle agglomerate for sted-smelting by oxygen converter damp dust |
| 08/26/1997 | US5660614 Supplying gas flow through rotating dispenser immersed in stirred molten metal flow; degassing, purification |
| 08/14/1997 | DE19608532A1 Cooling the electrodes in an arc furnace during steel production |
| 08/14/1997 | DE19608531A1 Refining steel to reduce carbon content |
| 08/14/1997 | DE19608530A1 Treating steel in the course of its production in a metallurgical furnace |
| 08/13/1997 | EP0789083A1 Process for vacuum refining of molten steel and apparatus therefor |
| 08/12/1997 | US5656236 Apparatus for gas treatment of molten metals |
| 08/12/1997 | US5656103 High tensile strength steel strap containing specified amounts of carbon, manganese, phosphorus, nitrogen, sulfur, silicon to remove oxygen, aluminum to kill and remove oxygen and nitrogen, boron to remove nitrogen |
| 08/07/1997 | WO1997028285A2 Producing stainless steels in parallel operated vessels |
| 08/07/1997 | DE19621143A1 Verfahren zur Erzeugung nichtrostender Stähle A method for producing stainless steels |
| 07/31/1997 | DE19623194C1 Delivery of injection wire |
| 07/30/1997 | EP0786532A2 Briquette containing silicious residual matter, useful as additive for metallurgical purposes and process for the manufacture thereof |
| 07/30/1997 | EP0627012B1 Process for desulphurising irons melts with minimal slag production and suitable device therefor |
| 07/23/1997 | EP0785284A1 Process for vacuum refining of molten steel |
| 07/23/1997 | EP0785283A1 Method of making ultra low-carbon steel |
| 07/22/1997 | US5650117 Slag detecting apparatus and method |
| 07/20/1997 | CA2195369A1 Method of making ultra low-carbon steel |
| 07/16/1997 | EP0784193A1 Metal fusion furnace and metal fusing method |
| 07/16/1997 | CN1154720A Nozzle for blowing gas into molten metal and usage thereof |
| 07/10/1997 | DE19600024A1 Detection of breakage and approaching coil end of injection wire |
| 07/02/1997 | CN1153217A Production process for Al-Mn-Si compound deoxidizer |
| 06/26/1997 | WO1997022710A1 Process for preparing intermediates for the synthesis of antifungal agents |
| 06/26/1997 | WO1997022555A1 Iron sulphide compositions |
| 06/26/1997 | DE19648306A1 Treatment of shredded scrap light constituents in a melt |
| 06/18/1997 | EP0779373A1 Method for direct use of chromite ore in the production of stainless steel |
| 06/18/1997 | EP0569448B1 A method of manufacturing stainless steel |
| 06/18/1997 | CN1152266A Mould fluxes for use in continuous casting of steel |
| 06/15/1997 | CA2184317A1 Direct use of chromite ore in the production of stainless steel |
| 06/12/1997 | WO1997020954A1 Simplified duplex processing of nickel ores and/or concentrates for the production of ferronickels, nickel irons and stainless steels |
| 06/12/1997 | DE19545831A1 Two-vessel electric-arc furnace |
| 06/11/1997 | CN1151440A Method and apparatus for controlled turbulent purging of open containers |
| 06/04/1997 | EP0776983A1 Nozzle for blowing gas into molten metal and usage thereof |
| 05/29/1997 | WO1997019197A1 Method and device for decarburizing steels melts |
| 05/27/1997 | US5632800 Accelerated decarburization of Fe-C metal alloys |
| 05/22/1997 | WO1997018335A2 Fireproof moulding plates with gas ducts |
| 05/22/1997 | CA2237628A1 Fireproof moulding plates with gas ducts |
| 05/15/1997 | DE19600608A1 Wire injection apparatus |
| 05/15/1997 | DE19542446A1 Feuerfeste Formplatten mit Gasführungskanälen Refractory mold plates with gas guide channels |
| 05/14/1997 | EP0772695A1 Gas flushing device in the blowpipe of a vacuum degassing vessel |
| 05/14/1997 | CN1149685A Air flow pipe of air removing tank |
| 05/09/1997 | WO1997016572A1 Accelerated decarburization of iron-carbon melts |
| 05/07/1997 | DE19538622C1 Dosing and conveying device for powdery pourable solids |
| 05/06/1997 | US5626753 System and method for the transport of lime |
| 05/06/1997 | CA2052737C Method of producing ultra-low-carbon steel |
| 05/02/1997 | EP0685000A4 Method and apparatus for slag free casting. |
| 05/01/1997 | WO1997015692A1 Process for decarbonising a high-chromium steel melt |
| 04/22/1997 | US5622673 Gas purging means for wall-side installation in metallurgical melting vessels |
| 04/17/1997 | WO1997013599A1 Nozzle assembly having inert gas distributor |
| 04/16/1997 | CN1034591C Process for vacuum degassing molten steel |
| 04/16/1997 | CN1034590C Production of steel-smelting metal raw materials by use of pig iron solid decarbonization method |
| 04/10/1997 | DE19540490C1 Verfahren zum Entkohlen einer Stahlschmelze A method of decarburization of steel melt |
| 04/09/1997 | EP0767021A2 Ladle cover for vacuum refining process |
| 04/09/1997 | CN1147277A Base electrode of DC heated metallurgical vessel |
| 04/08/1997 | US5618490 Vacuum installation, in particular for recycling metallurgy |
| 04/03/1997 | WO1997012068A1 Slag detecting apparatus and method |
| 04/03/1997 | WO1997012067A1 Tank lifting type vacuum degassing equipment |
| 04/03/1997 | WO1997012065A1 Method of melting tinned iron scrap |
| 04/03/1997 | CA2232860A1 Slag detecting apparatus and method |
| 04/02/1997 | CN1146492A Polyalloy for desoxy and alloying in steelmaking |
| 04/01/1997 | US5616188 Adding a controlled amount of calcium to a decarburized deoxidized steel to prevent formation of calcium sulfide and eliminate surface defects and rusting |
| 03/27/1997 | DE19535014A1 Introducing granular solids into metal melts |
| 03/26/1997 | EP0764822A1 Method and apparatus for controlled turbulent gas purging of open containers |
| 03/19/1997 | CN1145642A Process for the vacuum refining of metal and associated device |
| 03/18/1997 | CA2042773C Method of producing ultra-low-carbon steel |
| 03/11/1997 | US5609669 Method of manufacturing stainless steel |
| 03/11/1997 | US5609199 Method of manufacturing steel containing Ca |
| 03/06/1997 | WO1997008348A1 Process for vacuum refining of molten steel and apparatus therefor |
| 03/06/1997 | DE19623191C1 Metallurgical vacuum degassing unit suction tube |
| 03/05/1997 | EP0565690B1 Nozzle assembly for introducing fluids into a melt, and a method of operating the nozzle |
| 03/04/1997 | WO1997012066A1 Chromium ore smelting reduction process |