| Patents for C21C 7 - Treating molten ferrous alloys, e.g. steel, not covered by groups (11,430) |
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| 02/07/1989 | CA1249724A1 Si contained ferroalloy addition as a weak pre-deoxidation process in steelmaking |
| 02/02/1989 | DE3724200A1 Process for the low-level desulphurisation of base iron for the production of steel and cast iron |
| 02/01/1989 | CN1030793A Dehydrogenizing method of molten steel and spraying apparatus |
| 02/01/1989 | CN1030792A Recovery of vanadium oxide |
| 01/31/1989 | US4801328 For ferrous melts comprising a layer of aluminum surrounding a ferrous core |
| 01/25/1989 | EP0300907A1 Process and lance for the production of a bath of molten metal or alloys |
| 01/17/1989 | CA1248820A1 Apparatus for immersing solids into fluids and moving fluids in a linear direction |
| 01/11/1989 | CN1030200A Treatment process for detoxication of chromium slag |
| 01/04/1989 | EP0297850A1 Method and apparatus for degassing molten metal utilizing RH method |
| 01/04/1989 | CN1030096A Si-al-fe composite deoxidizing agent |
| 01/03/1989 | US4795609 High-strength steel for valve springs, process for producing the steel, and valve springs made of the same |
| 01/03/1989 | US4795491 High magnesium oxide content |
| 01/03/1989 | US4795138 For the injection of gases |
| 01/03/1989 | CA1247861A1 Gas permeable element of a refractory material |
| 12/28/1988 | EP0296352A2 Continuous casting tundish and assembly |
| 12/28/1988 | CN87104164A Covering agnet |
| 12/22/1988 | DE3719258A1 Heavy-current supply for smelting furnaces or crucible furnaces |
| 12/20/1988 | US4792125 For injecting a gas into a molten metal bath |
| 12/14/1988 | EP0294371A1 Activator mixture for increasing the strength of iron alloys. |
| 12/13/1988 | US4790872 Protective melted slag covering containing oxides of calcium, silicon, magnesium, aluminum |
| 12/13/1988 | US4790516 Vessel allows carbonaceous fuel and scrap iron to be charged directly into molten iron |
| 12/07/1988 | CN88102572A Metallurgy of metals by adding rare earth elements to eleminate the process of ingot casting and blanking |
| 12/06/1988 | US4789141 Nozzles for injecting substances into liquids |
| 12/06/1988 | CA1245862A1 Method for controlling secondary top-blown oxygen in subsurface pneumatic steel refining |
| 12/01/1988 | DE3742415C1 Covering bulk material for covering liquid pig iron or steel in metallurgical vessels |
| 11/23/1988 | EP0292205A1 Metallurgical treatment agents |
| 11/23/1988 | EP0291701A1 Charge preheater for preheating the charge of a metallurgical melting installation |
| 11/23/1988 | CN88102184A Charging material preheater for preheating charging material for a metallurgical smelting unit |
| 11/22/1988 | US4786322 Magnesium and calcium composite |
| 11/08/1988 | US4783057 Impregnating web with refractory solution, coating pipe, drying to bond |
| 11/08/1988 | CA1244245A1 Process for refining molten steel |
| 11/01/1988 | US4781887 Production of steels containing low melting point metals |
| 11/01/1988 | CA1243860A1 Method of producing boron alloy and a product produced by the method |
| 11/01/1988 | CA1243844A1 Method and agents for producing clean steel |
| 10/27/1988 | DE3712619A1 Method for controlling a wire injection device, corresponding wire store and corresponding wire-advancing machine |
| 10/26/1988 | CN88100857A Manufacturing process of granular protecting cinder for continuous casting |
| 10/25/1988 | US4780134 Simplified method and apparatus for treating molten steel |
| 10/25/1988 | US4780133 Process to improve the refining of liquid metals by natural gas injection |
| 10/25/1988 | US4779849 Gas washing device with reduced gas flow upon wear of gas sink |
| 10/25/1988 | US4779847 Metallurgical injection lance |
| 10/25/1988 | CA1243646A1 Method for treating carbide-based desulfurizing reagents for injection into molten iron |
| 10/25/1988 | CA1243560A1 Salt coated magnesium granules |
| 10/25/1988 | CA1243490A1 Method for refining molten metal bath to control nitrogen |
| 10/20/1988 | WO1988008041A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 10/20/1988 | WO1988008040A1 Improvements in sealing injection apparatus for injecting substances into molten metals |
| 10/19/1988 | EP0286934A1 Method of reducing lining wear in a ladle containing a melt |
| 10/18/1988 | US4778518 Slag-melt reactions with improved efficiency |
| 10/12/1988 | EP0286436A1 Improvements in sealing injection apparatus for injecting substances into molten metals |
| 10/12/1988 | EP0286435A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 10/05/1988 | EP0284694A2 Controlling dissolved oxygen content in molten steel |
| 09/29/1988 | DE3708730A1 Method for recycling precipitator dusts |
| 09/27/1988 | US4773929 Method of and device for the simultaneous heating and refining of a metal bath |
| 09/27/1988 | CA1242326A1 Treatment of molten metal |
| 09/27/1988 | CA1242325A1 Method of heating molten steel by arc process |
| 09/27/1988 | CA1242320A1 Apparatus for introducing substances into liquids e.g. metal melts |
| 09/21/1988 | EP0283130A2 Continuous casting of lead bearing steel |
| 09/20/1988 | US4773079 Process for melting down and degassing lumpy material |
| 09/20/1988 | US4772317 Two major phases, each including converter blowing and discharge steps |
| 09/20/1988 | CA1242078A1 Steelmaking of an extremely low carbon steel in a converter |
| 09/07/1988 | EP0281504A1 Method and device for degassing molten steel in a vacuum installation |
| 09/07/1988 | EP0281485A1 Composite product in a tubular envelope for treating molten-metal baths |
| 09/07/1988 | EP0281267A1 Devices and apparatus for injecting gas into high temperature liquids, E.G. molten metals |
| 09/07/1988 | EP0280765A2 Method of and installation for producing castings from pressure treated melts from steel alloys |
| 09/06/1988 | US4769066 Method for removing inclusions from a bath of molten metal and a device for carrying out this method |
| 09/06/1988 | US4768756 Converter for preparing steel and a gas supply device for such a converter |
| 09/06/1988 | US4768267 Method for assembling a gas circulation block provided for metallurgical vessels |
| 08/31/1988 | EP0279894A1 Method of desulfurizing iron |
| 08/25/1988 | WO1988006191A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 08/24/1988 | CN87105817A Method of desulfurizing iron |
| 08/23/1988 | US4765849 Improved hardenability |
| 08/23/1988 | US4765599 Apparatus for the automatic forming of continuous metal tube filled with powdered materials, its direct introduction into liquid metal, and related equipment |
| 08/17/1988 | EP0278235A1 Device for the storage of an oxidizable melt |
| 08/17/1988 | CN88100499A Shell-and-tube composite material suitable for treatment of melten matal bath |
| 08/10/1988 | EP0277664A1 Method and apparatus for the manufacture of powder-filled steel tube from steel strip |
| 08/10/1988 | CN86102210B Treating agent for desulfurizing molten steels and method for treating molten steels |
| 08/09/1988 | US4762555 Process for the production of nodular cast iron |
| 08/02/1988 | US4761178 Process for heating molten steel contained in a ladle |
| 08/02/1988 | CA1239791A1 Apparatus for degassing molten metal |
| 07/27/1988 | EP0275349A1 Method for the secondary metallurgical treatment of molten metal, especially molten steel |
| 07/26/1988 | CA1239540A1 Method for controlling slag chemistry in a refining vessel |
| 07/21/1988 | DE3700768A1 A process for the metallurgical treatment of molten crude metal, in particular molten crude steel in a ladle |
| 07/20/1988 | CN86108775A Activator mixture for increasing strength of iron alloys |
| 07/19/1988 | US4758269 Method and apparatus for introducing gas into molten metal baths |
| 07/13/1988 | EP0273947A1 Improvements in nozzles for injecting substances into liquids. |
| 07/12/1988 | CA1239023A1 Method and apparatus for adding solid alloying ingredients to molten metal stream |
| 07/06/1988 | EP0273576A1 Wire injection nozzle |
| 07/06/1988 | EP0273178A1 Powder-filled welded steel tube and method for the continuous manufacture thereof |
| 07/05/1988 | US4754800 Preventing undissolved alloying ingredient from entering continuous casting mold |
| 07/05/1988 | CA1238788A1 Method and apparatus for controlled melt refining |
| 06/30/1988 | WO1988004697A1 Activator mixture for increasing the strength of iron alloys |
| 06/28/1988 | US4753677 Cupola furnace with layer of coke |
| 06/28/1988 | US4753676 Compacted particle containing calcium carbide and a carbonate |
| 06/22/1988 | CN87208578U Continuous vacuum treating device |
| 06/22/1988 | CN86108225A Powder delivering device for rare-earth alloys by injection method |
| 06/16/1988 | DE3707322C1 Wire injection machine |
| 06/15/1988 | EP0270645A1 Improvements in apparatus for injecting substances into liquids |
| 06/15/1988 | CN87105780A Spraying reaction agent of liquid metal |
| 06/15/1988 | CN86108333A Comprehensive utilization method for final steel slag of open hearch |
| 06/14/1988 | US4751047 Method of adding low-melting-point metal to molten steel |
| 06/14/1988 | CA1237898A1 Production of tool steels using chemically prepared v.sub.2o.sub.3 as a vanadium additive |