| Patents for C21C 5 - Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel (14,381) |
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| 04/25/1990 | EP0364825A1 Apparatus for taking discontinuous measurements on molten metal |
| 04/25/1990 | EP0364724A1 Gas washing device |
| 04/25/1990 | EP0364723A1 Gas bubbling device |
| 04/25/1990 | EP0364722A1 Oxygen blast pipe |
| 04/25/1990 | EP0364721A1 Refining lance |
| 04/25/1990 | EP0364641A1 Treatment of metallurgical vessels |
| 04/25/1990 | CN1041617A Gas bubbling device |
| 04/25/1990 | CN1041616A Gas bubbling brick |
| 04/25/1990 | CN1041615A Gas bubbling device |
| 04/25/1990 | CN1041614A Apparatus for spraying touch-up materials onto perforated brick |
| 04/25/1990 | CN1007754B Temp.-mesuring device in converters |
| 04/24/1990 | US4919714 Method and apparatus for refining steel |
| 04/24/1990 | US4919713 Using scrap iron(or steel), pig iron, chromic oxide; efficiency |
| 04/18/1990 | EP0363651A1 Gas purging brick |
| 04/18/1990 | EP0363464A1 Refractory-gas permeable bubbling plug |
| 04/17/1990 | US4918282 Method and apparatus for heating molten steel utilizing a plasma arc torch |
| 04/12/1990 | DE3931337A1 Vorrichtung zum reinigen eines lanzenkopfes Apparatus for cleaning a sheet head |
| 04/11/1990 | EP0362253A1 Process for treating liquid metals |
| 04/10/1990 | US4915362 Carbon dioxide snow nozzle for metallurgy |
| 04/04/1990 | EP0360954A2 Method of melting cold material including iron |
| 04/04/1990 | CN1007432B Process for smelting high alloy steels in oxygen-blowing coverter |
| 04/04/1990 | CN1007411B Disinfection disposal of aluminium slag |
| 04/03/1990 | US4913735 Gaseous coolant circulation system to minimize flux buildup in injector |
| 04/03/1990 | US4913732 Feeding powdered ore and reducing agent to area of electric arc; blowing inert gas to stir |
| 04/03/1990 | US4913404 Temperature reactive core, swelling to fit the taphole to form a block |
| 03/28/1990 | EP0359828A1 Method for detecting slag flow |
| 03/27/1990 | US4911595 Apparatus for lining the inside wall of a vessel with bricks |
| 03/27/1990 | US4911414 Sealing injection apparatus for injecting substances into molten metals |
| 03/27/1990 | CA1266970A1 Nozzle arrangement for injecting gases or solid matter into a ladle containing molten metal |
| 03/21/1990 | CN1040530A Steel-making apparatus having metallurgical furnace and subsequent treating device |
| 03/20/1990 | US4909844 Fused matrix of calcium, iron, aluminum, magnesium oxide |
| 03/20/1990 | US4909303 Steel manufacturing system, particularly a mini-steel plant |
| 03/14/1990 | EP0358115A2 Bipartite final brick |
| 03/14/1990 | EP0357795A1 Radiation construction method for molten metal outflow port, its apparatus and recess radiating impeller used for said apparatus |
| 03/14/1990 | CN1040394A Metallurgical device (cn) |
| 03/13/1990 | US4908234 Two different aqueous pasty hardenable products containing fibrous material in ready to use aqueous mixture are applied in successive layers to surface of vessel |
| 03/08/1990 | WO1990002208A1 Method for producing general-purpose steel |
| 03/07/1990 | EP0357053A2 Apparatus and method for melting and homogenizing batch material |
| 03/07/1990 | EP0356943A1 Wear resistant metallurgical tuyere |
| 03/07/1990 | CN2053954U Slag ball core |
| 02/28/1990 | EP0355725A2 Steel making plant with a metallurgical furnace and a subsequent processing installation |
| 02/28/1990 | EP0355526A2 Desulphurising flux composition for basic steel-slags and relevant method |
| 02/28/1990 | EP0355163A1 Process for producing molten stainless steel |
| 02/28/1990 | CN1040056A Compound pulley spring of balancing converter inclining torque moment |
| 02/27/1990 | US4903948 Metallurgical vessel |
| 02/20/1990 | US4901983 Blast pipe for metallurgical processes having refractory coated surfaces |
| 02/20/1990 | CA1265927A1 Sidewall for a metallurgical smelting furnace |
| 02/14/1990 | EP0354897A1 Method and apparatus for heating molten steel |
| 02/14/1990 | CN1039651A Device for separating slag and steel |
| 02/13/1990 | US4899994 Device for monitoring the level of molten metal in a converter |
| 02/13/1990 | US4899992 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 02/08/1990 | WO1990001071A1 Method for producing general-purpose steel |
| 02/07/1990 | EP0353541A2 A method of recycling steel belted tires |
| 02/07/1990 | EP0235291B1 Method for obtaining vanadium slag |
| 02/07/1990 | CN1039446A Method for batch production of steel in oxygen steel converter with scrap input |
| 02/07/1990 | CN1006720B Cermet oxygen-blow pipe |
| 02/06/1990 | US4898369 Lance with metered core for treating molten metal |
| 02/06/1990 | US4898368 Wear resistant metallurgical tuyere |
| 02/06/1990 | US4898366 Apparatus for charging a melting gasifier with gasification media and sponge iron |
| 02/06/1990 | US4898227 Plant to convert a metallic charge into semifinished products |
| 02/06/1990 | CA1265566A1 Combination electric furnace and slag retaining pouring spout |
| 01/30/1990 | US4896810 Apparatus for melting scrap |
| 01/30/1990 | CA1265179A1 Electrode structure for a bath of molten metal |
| 01/25/1990 | WO1990000627A1 Cold hearth refining apparatus and method |
| 01/24/1990 | EP0352254A2 Process for heating steel melts |
| 01/24/1990 | CN1039061A Steel-smelting process from steel scrap |
| 01/23/1990 | US4895594 Or pig iron, sub-stoichiometric burners, combustion, discharging, ladles, tapholes, preferential, rotation |
| 01/17/1990 | EP0350982A1 A method for the batch production of steel in an oxygen steel converter with scrap input |
| 01/17/1990 | CN1038840A Infrared process of smelting of low carbon, low-alloy steel by electric furnace |
| 01/16/1990 | US4893933 Automatic BOF vessel remaining lining profiler and method |
| 01/16/1990 | US4893791 Automatic lance changeover device |
| 01/11/1990 | DE3822705A1 Method for the measurement of the bath level of a metal bath in a container |
| 01/10/1990 | CN1006402B Process for ranadium residue |
| 01/03/1990 | EP0349523A2 Installation for the separation of slag from steel |
| 01/03/1990 | EP0349513A1 Thermic shield permitting renovation of Cowpers and process for its putting into practice |
| 01/03/1990 | EP0275311B1 Method and multi-nozzle tuyere for guniting of metallurgical plant |
| 01/03/1990 | CN1006302B Decontamination plant on the metallurgical revolving furnace |
| 01/02/1990 | US4891822 Inductor apparatus for metal treatment |
| 01/02/1990 | US4891064 Dephosphorization |
| 01/02/1990 | US4890821 Metallurgical processes |
| 01/02/1990 | US4890375 Repair of steel-making vessels |
| 12/26/1989 | US4889556 Method of recycling steel belted tires |
| 12/26/1989 | US4889323 Steel making |
| 12/13/1989 | EP0200743B1 Destruction of toxic chemicals |
| 12/13/1989 | EP0179865B1 Process for controlling slag chemistry in a refining vessel |
| 12/07/1989 | DE3817845A1 Process for the pollution-free immobilization of dust, which contains water-soluble compounds polluting the environment, from steelworks dedusting installations |
| 12/06/1989 | EP0344600A2 Process for increasing scrap addition by preparing the scrap in the converter |
| 12/05/1989 | CA1263679A1 Wall electrode for direct current electric mettallurgical cell |
| 11/30/1989 | WO1989011774A1 Wear-resistant electrode for direct current arc furnaces |
| 11/30/1989 | DE3817381A1 Verschleissarme elektrode in gleichstromlichtbogenofen -Wear electrode in DC arc furnace |
| 11/29/1989 | CN1037545A Blast guns |
| 11/29/1989 | CN1037542A Process and apparatus for post combustion |
| 11/28/1989 | US4883259 Apparatus for coupling a metallurgical ladle to a gas supply |
| 11/23/1989 | EP0342395A1 Device for introduction of powdery agents into a melting ladle |
| 11/23/1989 | EP0342374A1 Method for smelting reduction in electric furnace |
| 11/22/1989 | CN1037361A Injection or blowing lance comprising cooling chamber |
| 11/21/1989 | US4881990 Steel product with globular manganese sulfide inclusions |
| 11/21/1989 | US4881972 Process for feeding heat energy into a molten metal bath |
| 11/21/1989 | US4881670 Automatic melt supplying method and holding furnace having automatic melt supplying system |
| 11/15/1989 | EP0341798A1 Plug for use in a steel converter to minimize tapping off of slag |