| 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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| 05/02/1989 | US4827486 Process for increasing the energy input in electric arc furnaces |
| 05/02/1989 | US4826139 Stopper for a tap hole of a steel converter and method of operating a converter |
| 04/27/1989 | DE3804155C1 Method for operating heating stations for charge materials of metallurgical melting furnaces |
| 04/26/1989 | EP0313547A1 Continuous steel melting process |
| 04/26/1989 | CN1032553A Process for continuously melting of steel |
| 04/26/1989 | CN1004028B Apparatus for heating charges |
| 04/26/1989 | CN1004009B Coa-oxygen spray gun for a converter and its protecting technology |
| 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 | US4822411 Integrated steel mill arrangement |
| 04/18/1989 | US4822379 Solid fuel composition from waste products |
| 04/13/1989 | DE3733349A1 Method and apparatus for melting down scrap, sponge-iron pellets or the like |
| 04/13/1989 | DE3732939A1 Steel production process and system for carrying it out |
| 04/12/1989 | EP0311261A2 Holder for a molten metal sampling device |
| 04/11/1989 | US4821284 Scrap-melting process and electric furnace for carrying out the process |
| 04/06/1989 | WO1989003011A1 Vessels for containing molten metal |
| 04/05/1989 | EP0310244A2 Automatic basic-oxygen-furnace vessel remaining lining profiler and method |
| 04/05/1989 | EP0309583A1 Method of melting and refining metals, and an apparatus for cooling electrodes used therefor |
| 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 | CN2035286U Skimming ball distributor device |
| 04/05/1989 | CN1032193A Process for melting scrap iron, sponge iron and/or solid pig iron or the like |
| 04/04/1989 | US4818281 Method of melting in an oxygen converter |
| 04/04/1989 | US4817919 Device for casting, particularly converter for casting and/or post-treating molten metal |
| 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 |
| 03/29/1989 | CN1031954A Apparatus for skimming of molten steel |
| 03/28/1989 | US4815715 Gas purging assembly for supplying gas to molten metal in a metallurgical vessel |
| 03/23/1989 | WO1989002479A1 Process for decarburizing high-cr molten pig iron |
| 03/23/1989 | WO1989002478A1 Process for producing molten stainless steel |
| 03/23/1989 | WO1989002477A1 Method of charging ore in melt-reduction |
| 03/21/1989 | US4814006 Multistage metallurgy |
| 03/21/1989 | US4814005 Flux material for steelmaking |
| 03/14/1989 | US4812117 Method and device for pre-heating waste metal for furnaces |
| 03/09/1989 | WO1989001983A1 Consumable lance |
| 03/09/1989 | WO1989001982A1 Process and device for minimizing process gas consumption in metallurgical processes |
| 03/09/1989 | WO1989001981A1 Congeneration process for production of energy and iron materials, including steel |
| 03/09/1989 | DE3728399A1 Dipped lance |
| 03/08/1989 | EP0209532B1 Apparatus for heating charging material |
| 03/08/1989 | CN2033817U Slag-guard cap |
| 03/02/1989 | DE3827936A1 Equipment and process for reducing the entrained slag fraction with the least possible residual steel quantity in the converter |
| 03/01/1989 | EP0305319A1 Device and method for reducing slag carry-over with a minimal amount of steel remaining in the converter |
| 03/01/1989 | EP0304688A1 Immersion lance |
| 02/28/1989 | US4808219 Electromagnetic raising and falling of melt gives vigorous mixing of added materials; alloying purification |
| 02/28/1989 | CA1250427A1 Method of operating a metallurgical furnace and a metallurgical furnace apparatus |
| 02/23/1989 | WO1989001532A1 Process for melt reduction of cr starting material and melt reduction furnace |
| 02/23/1989 | WO1989001530A1 Metallurgical controlling method |
| 02/23/1989 | DE3727039A1 Process for steel smelting using iron sponge |
| 02/22/1989 | EP0304413A1 Method for melting scrap, sponge iron and/or solid pig iron or the like |
| 02/22/1989 | EP0187777B1 Device for the injection of gases into molten metals and minerals |
| 02/21/1989 | US4806150 Device and technique for in-process sampling and analysis of molten metals and other liquids presenting harsh sampling conditions |
| 02/21/1989 | CA1250356A1 Method and apparatus for measuring slag-forming conditions within converter |
| 02/21/1989 | CA1250142A1 Device for introducing gas into molten metal |
| 02/15/1989 | EP0303285A1 Tuyere assembly and positioning method |
| 02/15/1989 | EP0302914A1 Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals |
| 02/14/1989 | US4805186 Process for the continuous melting of scrap in an electric direct-current furnace and electric furnace for carrying out the process |
| 02/14/1989 | US4804408 A mill arrangement and a process of operating the same using off gases to refine pig iron |
| 02/08/1989 | EP0302405A2 Pouring device of molten-metal-containing vessel |
| 02/08/1989 | CN2032196U Converter side gun socket connector |
| 02/08/1989 | CN1030942A Continuous steelmaking technique and equipment |
| 02/07/1989 | US4802655 Apparatus for injecting substances into liquids |
| 02/01/1989 | CN1030792A Recovery of vanadium oxide |
| 01/24/1989 | US4799651 Device for introducing separated fluids through independent flow paths through bottom tuyeres in a rotating metallurgical converter |
| 01/24/1989 | US4799650 during drawing of of molten metal from a vessel |
| 01/19/1989 | DE3722948A1 Cooled upper converter casing |
| 01/19/1989 | DE3722645A1 Steel production process, and appliance for carrying it out |
| 01/18/1989 | EP0299231A1 Method for charging fuel and sponge iron into a melting furnace |
| 01/11/1989 | CN1030200A Treatment process for detoxication of chromium slag |
| 01/10/1989 | US4797154 Plant to convert a metallic charge into semifinished products, and connected smelting and casting method |
| 01/10/1989 | US4797087 Method and apparatus for generating highly luminous flame |
| 01/03/1989 | US4796277 Melting furnace for melting metal |
| 01/03/1989 | US4795139 Apparatus for tapping slag-free steel from a continuous melting furnace |
| 01/03/1989 | US4795138 For the injection of gases |
| 01/03/1989 | CA1247861A1 Gas permeable element of a refractory material |
| 12/28/1988 | EP0297083A2 Spruing station for ladles |
| 12/22/1988 | DE3719258A1 Heavy-current supply for smelting furnaces or crucible furnaces |
| 12/20/1988 | US4792352 Method for manufacturing steel through smelting reduction |
| 12/20/1988 | US4792126 Blow lance for treating molten metal in metallurgical vessels |
| 12/20/1988 | US4792125 For injecting a gas into a molten metal bath |
| 12/20/1988 | US4792124 Sub-lance installation for carrying out measurements and/or taking samples in a metallurgical furnace |
| 12/20/1988 | US4792123 Metallurgical plant |
| 12/20/1988 | CA1247179A1 Electrical connecting device to be mounted on the wall of a metallurgical vessel in direct contact with a molten metal |
| 12/20/1988 | CA1247178A1 Arc furnace with variable capacity |
| 12/13/1988 | US4790516 Vessel allows carbonaceous fuel and scrap iron to be charged directly into molten iron |
| 12/13/1988 | CA1246344A1 Multi-purpose pyrometallurgical process enhancing device |
| 12/08/1988 | DE3716920A1 Gas bubble system with gas break-through protection means |
| 12/06/1988 | US4789141 Nozzles for injecting substances into liquids |
| 12/06/1988 | US4789139 Methods of and apparatus for constructing refractory brick linings on tuyere plates for metal treating vessels |
| 12/06/1988 | CA1245862A1 Method for controlling secondary top-blown oxygen in subsurface pneumatic steel refining |
| 12/01/1988 | WO1988009388A1 Process for treating liquid metals |
| 12/01/1988 | DE3717457A1 Method for fully automatic measurement and sampling on secondary metallurgical steel vessels |
| 11/29/1988 | US4787796 Apparatus for lining the inner wall of a vessel with bricks |
| 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 | US4786321 Coal combustion |
| 11/22/1988 | US4786227 Automated apparatus for lining the inside wall of a vessel with bricks |
| 11/17/1988 | EP0291498A1 Electric furnace, such as an electric arc or plasma furnace |
| 11/17/1988 | EP0291497A1 Electric furnace, such as an electric arc or plasma furnace |
| 11/17/1988 | EP0291156A1 Earth fault check system |
| 11/17/1988 | EP0290766A2 Gas flushing plug |