| Patents for C21C 7 - Treating molten ferrous alloys, e.g. steel, not covered by groups (11,430) |
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| 10/10/1989 | US4872648 Reaction vessel for processing steel |
| 10/04/1989 | EP0334915A1 Process for heating molten steel contained in a ladle |
| 09/26/1989 | US4869749 Unkilled steel |
| 09/26/1989 | CA1261620A1 Apparatus for introducing treatment substances into liquids |
| 09/21/1989 | WO1989008811A1 Radiation construction method for molten metal outflow port, its apparatus and recess radiating impeller used for said apparatus |
| 09/21/1989 | WO1989008719A1 Method for detecting slag flow |
| 09/21/1989 | DE3808682A1 Device on a vacuum treatment unit |
| 09/20/1989 | EP0332751A2 Method for adding liquid alloying ingredient to molten steel |
| 09/14/1989 | DE3807281A1 Wire injection machine |
| 09/13/1989 | EP0332569A1 Arc-heating device for ladles or ladle furnaces |
| 09/13/1989 | EP0331751A1 PROCESS FOR DECARBURIZING HIGH-Cr MOLTEN PIG IRON |
| 09/13/1989 | EP0331707A1 Vessels for containing molten metal |
| 09/05/1989 | US4863803 Composite product with a tubular casing for treating molten metal baths |
| 09/05/1989 | US4863684 Method and apparatus for adding shot to molten steel |
| 08/30/1989 | CN1035137A Method for smelting micro-carbon chrome iron by the top-bottom compound blow converter |
| 08/29/1989 | US4861368 Method for producing iron |
| 08/29/1989 | US4860819 Continuous casting tundish and assembly |
| 08/24/1989 | WO1989007499A1 Superheating and microalloying of molten metal by contact with a plasma arc |
| 08/23/1989 | EP0328851A1 An apparatus for decarbonizing steels directly in the ladle |
| 08/23/1989 | CN1034959A Making process for si-ba alloy |
| 08/16/1989 | EP0328270A2 Metallurgical treatment agents |
| 08/16/1989 | CN1034759A Process for feeding heat energy into molten metal bath |
| 08/15/1989 | US4857280 Method for the regeneration of sulfided cerium oxide back to a form that is again capable of removing sulfur from fluid materials |
| 08/10/1989 | WO1989007157A1 Improved metallurgical injection lance |
| 08/09/1989 | CN1034582A Electroslag refining process for molten casting iron of cupola furnace |
| 08/08/1989 | US4855105 Of iron, carbon, manganese, titanium, nitrogen |
| 08/08/1989 | US4854553 Self shielding lance |
| 08/08/1989 | CA1258178A1 Method of refining molten steel by arc process |
| 08/02/1989 | EP0325862A2 Additive for promoting slag formation in steel refining ladle |
| 08/02/1989 | EP0325709A2 Gas flushing brick |
| 08/01/1989 | US4853034 Using premelted synthetic slag which is obtained from ferrovanadium process |
| 08/01/1989 | US4852858 Charging material preheater for preheating charging material for a metallurgical smelting unit |
| 08/01/1989 | US4852632 Apparatus for preventing undissolved alloying ingredient from entering continuous casting mold |
| 07/27/1989 | WO1989006706A1 Heat resistant composite and method of making the same |
| 07/26/1989 | EP0325242A2 Method for refining molten steel in a vacuum |
| 07/18/1989 | US4849167 Method and appartus for adding liquid alloying ingredient to molten steel |
| 07/18/1989 | US4849165 Metal treatment agents |
| 07/18/1989 | US4848755 Apparatus for adding liquid alloying ingredient to molten steel |
| 07/18/1989 | US4848751 Lance for discharging liquid nitrogen or liquid argon into a furnace throughout the production of molten metal |
| 07/12/1989 | EP0178310B1 Pneumatic charger for feeding pulverized and granular materials into metal melts |
| 07/12/1989 | CN2040910U Single suction nozzle vacuum refining equipment |
| 07/11/1989 | CA1257091A1 Gas purge brick for metallurgical furnaces and vessels |
| 07/05/1989 | EP0322763A2 Method for cleaning molten metal and apparatus therefor |
| 07/05/1989 | EP0176536B1 Apparatus for and a method of removing material |
| 06/27/1989 | US4842642 Additive for promoting slag formation in steel refining ladle |
| 06/27/1989 | CA1256286A1 Pivotal sliding gate valves |
| 06/21/1989 | EP0320758A2 Installation and process for slagging metal melts from metallurgical vessels |
| 06/21/1989 | EP0320673A1 Metallurgical vessel |
| 06/14/1989 | EP0319544A1 Tundish for mixing alloying elements with molten metal |
| 06/06/1989 | CA1255245A1 Process for the manufacture of coke granulates as a carburizing agent |
| 05/31/1989 | EP0318352A1 Carbon dioxide lance for metallurgy |
| 05/24/1989 | EP0317187A2 Metallurgical tuyere and method of calibrating same |
| 05/24/1989 | EP0316921A1 Lead-containing additives for steel melts |
| 05/24/1989 | EP0316920A1 Nitrogen containing additive for molten steel |
| 05/23/1989 | US4832742 Core with sheath |
| 05/18/1989 | WO1989004378A1 Radiant heat vaporizing method and apparatus |
| 05/18/1989 | WO1989004377A1 Process for oxidizing treatment of steel |
| 05/17/1989 | CN1032960A Exothermic, slag trapping and insulating covering agent |
| 05/17/1989 | CN1032959A Slagging heat-insulating covering agent |
| 05/16/1989 | US4830666 Introducing hydrogen into the melt as gas or compound |
| 05/16/1989 | US4830090 Lead sediment layer |
| 05/09/1989 | US4828014 Continuous casting tundish and assembly |
| 05/03/1989 | DE3735835A1 Method of reducing the consumption of process gas |
| 05/02/1989 | US4826664 Methods of desulfurizing gases |
| 04/25/1989 | US4824080 Apparatus for introducing gas into molten metal baths |
| 04/19/1989 | EP0311978A1 Process for delivering heat to molten metal |
| 04/18/1989 | US4822379 Solid fuel composition from waste products |
| 04/12/1989 | EP0310604A1 Arrangement in steel manufacturing by means of inductive stirring |
| 04/12/1989 | CN2035758U Self comsuming spray gun |
| 04/11/1989 | US4820342 Method of reducing lining wear |
| 04/11/1989 | US4819918 Apparatus for the protection of a liquid against the effects of oxygen from the surroundings |
| 04/06/1989 | WO1989003011A1 Vessels for containing molten metal |
| 04/05/1989 | EP0309518A1 Improvements in sealing injection apparatus for injecting substances into molten metals |
| 04/05/1989 | EP0309517A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 04/05/1989 | CN1003796B 镁.氧化钙复合物 Magnesium. Calcium oxide composite |
| 04/04/1989 | US4817918 Apparatus for filtering molten scraps of metal for regeneration |
| 04/04/1989 | CA1251952A1 Steel materials for welded structures |
| 03/30/1989 | DE3728526C1 Method for minimising the process gas consumption in metallurgical processes |
| 03/29/1989 | CN1032034A Method of decarburizing high cr molten metal |
| 03/28/1989 | US4816758 Method and apparatus for the detection of slag co-flowing within a stream of molten metal |
| 03/28/1989 | US4816068 Composite article having a tubular sheath containing a compacted material, for the treatment of liquid metals, and process for the production of said article |
| 03/23/1989 | WO1989002479A1 Process for decarburizing high-cr molten pig iron |
| 03/23/1989 | WO1989002478A1 Process for producing molten stainless steel |
| 03/22/1989 | CN1031863A Process for adding selenium to molten steel |
| 03/21/1989 | US4814005 Flux material for steelmaking |
| 03/15/1989 | EP0307262A1 Process for stirring steel in the ladle with carbon dioxide |
| 03/14/1989 | US4811889 Method and apparatus for the manufacture of powder-filled steel tube from steel strip |
| 03/14/1989 | US4811782 Injection of metals as plasma into cast iron and steel melts |
| 03/09/1989 | WO1989001984A1 Process for heating molten steel contained in a ladle |
| 03/09/1989 | WO1989001983A1 Consumable lance |
| 03/09/1989 | WO1989001982A1 Process and device for minimizing process gas consumption in metallurgical processes |
| 03/07/1989 | US4810287 Low titanium, deoxgenation, denitrogenization, purification |
| 03/07/1989 | US4810286 Method for reducing dissolved oxygen and carbon contents in molten steel |
| 02/21/1989 | US4806163 Mold additives for use in continuous casting |
| 02/21/1989 | US4806156 Process for the production of a bath of molten metal or alloys |
| 02/21/1989 | CA1250142A1 Device for introducing gas into molten metal |
| 02/15/1989 | EP0302914A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 02/15/1989 | CN1003308B Process for desulphurising melten metal |
| 02/07/1989 | US4802918 Highly pure refined and carburized steel having low amount of oxygen, sulfur, phosphorus |
| 02/07/1989 | US4802655 Apparatus for injecting substances into liquids |