| Patents for C21C 7 - Treating molten ferrous alloys, e.g. steel, not covered by groups (11,430) |
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| 01/28/1992 | US5084090 Vacuum processing of reactive metal |
| 01/28/1992 | US5083753 Tundish barriers containing pressure differential flow increasing devices |
| 01/22/1992 | CN1058049A Compositions and methods for sythesizing ladle slags treating ladle slags, and coating refractory linings |
| 01/20/1992 | CA2044529A1 Vacuum processing of reactive metal |
| 01/09/1992 | WO1992000391A1 Liquid steel bath reheating method and device for implementing same |
| 01/02/1992 | EP0462988A1 Process and device for handling metals in a vacuum. |
| 12/27/1991 | EP0462538A1 Vacuum-suction continuous degassing apparatus |
| 12/27/1991 | EP0462537A1 Vacuum-suction degassing apparatus |
| 12/27/1991 | EP0462535A1 Vacuum-suction degassing apparatus |
| 12/26/1991 | WO1991019590A1 Method of manufacturing tube filled with powder and granular material |
| 12/18/1991 | EP0461415A1 Method of producing ultra-low-carbon steel |
| 12/17/1991 | CA2044725A1 Vacuum-suction degassing apparatus |
| 12/17/1991 | CA2044722A1 Vacuum-suction continous degassing apparatus |
| 12/12/1991 | WO1991019013A1 Process for refining molten metal or alloy |
| 12/04/1991 | CN1056715A Waste iron chip smelting direct casting piece technology |
| 12/04/1991 | CN1056672A Making method of active lime powder agent for injection metallurgy |
| 12/03/1991 | CA1292615C Method and apparatus for agitating metals and producing alloys |
| 11/28/1991 | DE4026958C1 Molten steel useful for degassing plant - has hood with graphite heating rod clamped by fixed and movable heads, and piston- cylinder pressure compensating means |
| 11/27/1991 | EP0458040A2 Gas purging assembly with a perforated brick and a gas purging brick |
| 11/27/1991 | CN1014904B Brick for gas-blowing wash |
| 11/19/1991 | US5066350 Protecting Pipes Used In Molten Metals |
| 11/19/1991 | CA1292119C Apparatus for injecting substances into liquids |
| 11/13/1991 | EP0456001A2 Device for gas flushing |
| 11/13/1991 | CN1056128A Gas flushing device and sleeve brick and gas flushing brick for it |
| 11/08/1991 | CA2041925A1 Gas flushing brick |
| 11/06/1991 | CN1014614B Method of dephosphorylation of mn, fe for blast furnace |
| 11/06/1991 | CN1014613B Vacuum induction furnace |
| 11/05/1991 | US5062615 Apparatus for the introduction of reagents in powder form into a melting pan |
| 10/16/1991 | EP0451473A1 Process and installation for feeding of pulverized agents into a melting ladle |
| 10/16/1991 | EP0451385A1 Method of manufacturing clean steel |
| 10/15/1991 | US5056762 Apparatus for mounting a gas washing sink in a centered manner in a perforated brick |
| 10/15/1991 | CA1290574C Method of making steel |
| 10/09/1991 | EP0450678A2 Sulphur treatment of magnesium-contaminated Fe-Cr-Al alloy for improved oxide whisker growth |
| 10/09/1991 | EP0450544A2 A vacuum-suction degassing method and an apparatus therefor |
| 10/08/1991 | US5055018 Clean steel |
| 10/07/1991 | WO1991015604A1 Compositions and methods for synthesizing ladle slags, treating ladle slags, and coating refractory linings |
| 10/07/1991 | CA2079872A1 Compositions and methods for synthesizing ladle slags, treating ladle slags, and coating refractory linings |
| 10/04/1991 | CA2039674A1 Vacuum melting furnace |
| 09/11/1991 | CN1013883B Method for manufacturing molten metal containing ni and cr |
| 09/10/1991 | US5047081 Blowing oxygen diluted with inert gas from furnace top and inert gas from bottom to agitate; controlling slag amount |
| 09/10/1991 | CA2015611A1 Metallurgical flux compositions |
| 09/03/1991 | CA1288248C Method for suppressing fuming in molten steel |
| 08/13/1991 | US5039480 Method for manufacturing molten metal containing Ni and Cr |
| 08/13/1991 | CA1287495C Magnesium calcium oxide composite |
| 08/06/1991 | US5037609 Material for refining steel of multi-purpose application |
| 07/31/1991 | CN1053450A Formula for producing silica-alumina iron by use of ore-heating method and production process thereof |
| 07/31/1991 | CN1053449A Multipurpose steel refining agent |
| 07/24/1991 | EP0438004A1 Method and device for making composite products having a metal matrix |
| 07/24/1991 | EP0437769A1 Method and conveying plant for blowing pulverulent treating agents into iron and steel melts |
| 07/24/1991 | CN1013283B Method for preparing silicon aluminium iron as steely deoxidant |
| 07/24/1991 | CN1013280B Method of decarburizing high cr molten metal |
| 07/23/1991 | CA1286506C Method of desulfurizing iron |
| 07/23/1991 | CA1286505C Method for producing iron |
| 07/17/1991 | CN1053026A Technology for processing molten manganese steel and equipment thereof |
| 07/10/1991 | CN1052901A Compond deoxidant (si-al-ba-fe alloy) made from alkaline earth metals |
| 07/09/1991 | CA1285773C Purifying steel |
| 07/09/1991 | CA1285772C Methods for simultaneously desulfurizing and degassing steels |
| 07/02/1991 | US5028257 Increased magnesium oxide content, nondestructive to tundish lining, covering for molten steel |
| 07/02/1991 | US5028033 Process for detecting outflow of slag |
| 07/02/1991 | CA1285393C Method for adding bismuth to steel in a ladle |
| 06/26/1991 | CN1052510A Special smelting process "electroslag induction refining" |
| 06/19/1991 | CA2032409A1 Process and apparatus for producing metal matrix composite |
| 06/18/1991 | US5024421 Interlocking snorkel refractory |
| 06/18/1991 | CA1284877C Converter for preparing steel and a gas supply device for such a converter |
| 06/12/1991 | CN1052146A Self-cleaning method of steel ladle |
| 05/29/1991 | CN2077868U Cyclone spray gun |
| 05/22/1991 | CN1051588A Ferrovanadium slag depletion agent and application thereof |
| 05/16/1991 | DE3931024C1 Steel prodn. having low phosphor content - comprises single stage process using calcium oxide saturated residual stage from porous melt |
| 05/14/1991 | US5015287 Steel melting and secondary-refining method |
| 05/08/1991 | CN2076554U Integrally combined full consumption type spray lance |
| 05/07/1991 | CA1283796C High-strength steel for valve springs, process for producing the steel, and valve springs made of the same |
| 05/07/1991 | CA1283779C Arrangement for use in the thermal analysis and modification of molten metal |
| 05/01/1991 | CN1012504B Comprehensive utilizing method for final steel slag of open hearch |
| 04/30/1991 | US5011531 Method and apparatus for degassing molten metal utilizing RH method |
| 04/24/1991 | CN1050902A Blast furnace ferromanganese dephosphorize method |
| 04/16/1991 | US5007958 Forming powder of calcium oxide, fluorite, aluminum; reacting with carbon dioxide to coat with calcium carbonate |
| 04/16/1991 | US5007621 Apparatus for mounting a gas washing sink in a centered manner in perforated brick |
| 04/16/1991 | US5007366 Refractory gas permeable bubbling plug |
| 04/04/1991 | DE3932162A1 Mfg. spherical graphite iron - using magnesium silicide additive (promoted by rare earth metal) to moderate vigorous reaction and to improve prod. |
| 03/19/1991 | CA1281551C Method for addition of low-melting point metal |
| 03/05/1991 | US4997167 Ladle inoculant dispenser |
| 02/27/1991 | EP0413894A1 Pneumatic steelmaking vessel and method of producing steel |
| 02/27/1991 | CN1049528A Si-al-fe steel-making deoxidant and prepn. thereof |
| 02/26/1991 | US4995907 Method of deoxiding and alloying steel |
| 02/26/1991 | US4995592 Purifying molten metal |
| 02/20/1991 | CN1049378A Deoxidising agent for manufacture of steel with converters |
| 02/20/1991 | CN1049377A Sythetic diesel especially suitable to cold area |
| 02/19/1991 | US4994108 Process for producing high cleanness extra low carbon steel |
| 02/19/1991 | US4993691 Oxygen injection lance |
| 02/19/1991 | CA1280288C2 Multi-purpose pyrometallurgical process enhancing device |
| 02/13/1991 | CN2071321U High temp. resistance anti-oxidation flame-retarded oxygen blowing jet |
| 02/13/1991 | CN1049187A Gas injector |
| 02/13/1991 | CN1049117A Presmelting vitrification continuous casting protective slag and its producing technology |
| 02/13/1991 | CN1011598B Composite product, containing compacted material, for treatment of molten metal, and mfr. method thereof |
| 02/12/1991 | US4991825 Gases into metallurgical vessels |
| 02/06/1991 | EP0411061A1 Fe-Mn-Al-C ALLOYS AND THEIR TREATMENT. |
| 02/05/1991 | US4990183 Process for producing steel having a low content of nitrogen in a ladle furnace |
| 01/30/1991 | EP0410360A1 Agent for treating of castiron melts |
| 01/26/1991 | CA2021451A1 Agent for the treatment of cast iron melts, process for the production thereof and the use thereof for treating cast iron melts |
| 01/23/1991 | EP0409794A1 Alloy preparation of hydrogen storage material |