| 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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| 10/16/1991 | EP0451323A2 Method for preheating scrap iron by pyrolysis of resinous residues contained therein, with total recovery of their energy content and improvement of the steelmaking cycle |
| 10/16/1991 | CN1055426A Distance measuring method and apparatus therefor |
| 10/16/1991 | CN1055392A In-furnace slag level measuring apparatus |
| 10/16/1991 | CN1055391A In-furnace slag level measuring method and apparatus therefor |
| 10/15/1991 | US5057149 Alloying, carbiding additive into molten metal |
| 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 |
| 10/13/1991 | WO1991016459A1 Metallurgical vessel and a process for producing the refractory lining of such vessels |
| 10/10/1991 | CA2023414A1 Method of and apparatus for preheating and removing organic materials from scrap iron |
| 10/09/1991 | EP0449835A1 Consumable injection lance |
| 10/08/1991 | US5055131 Coal is pyrolysed to char, reduction of iron ore with char and generating hot gases, utilization of hot gases as electricity |
| 10/03/1991 | WO1991014912A1 Direct current electric furnace |
| 10/03/1991 | CA2057882A1 Direct current electric furnace |
| 10/02/1991 | EP0449596A2 Distance measuring method and apparatus therefor |
| 10/02/1991 | EP0449590A2 In-furnace slag level measuring apparatus |
| 10/02/1991 | EP0449258A2 Furnace bottom structure of direct current electric furnace |
| 10/01/1991 | US5054033 Tiltable arc furnace |
| 10/01/1991 | CA2038825A1 In-furnace slag level measuring apparatus |
| 10/01/1991 | CA2038823A1 In-furnace slag level measuring method and apparatus therefor |
| 10/01/1991 | CA2038818A1 Distance measuring method and apparatus therefor |
| 10/01/1991 | CA1289743C Plant for producing steel from scrap |
| 09/26/1991 | DE4009291A1 Tapping system for metallurgical vessel - has tubular element joining the vessel bottom to reception container top to facilitate tilting |
| 09/24/1991 | US5051127 Process for post combustion |
| 09/24/1991 | US5050848 Apparatus for post combustion |
| 09/20/1991 | WO1991014911A1 Dc electric furnace for melting metal |
| 09/18/1991 | EP0447300A1 Method for melting and refining a batch |
| 09/18/1991 | EP0446252A1 Improvements relating to steel-making vessels. |
| 09/18/1991 | CN1054663A Probe for taking gas samples and heat measu ments in shaft furnace |
| 09/17/1991 | US5049357 Method for manufacturing iron-boron-silicon alloy |
| 09/17/1991 | CA1288954C Process for producing high-quality steel |
| 09/11/1991 | EP0445599A2 Probe for taking gaseous samples and making thermal measurements in a shaft 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 |
| 09/08/1991 | CA2037224A1 Probe for taking gas samples and heat measurements in a shaft furnace |
| 09/04/1991 | EP0444834A2 In furnace- level meter and antenna therefor |
| 09/04/1991 | CN1054318A In-furnace level meter and antenna therefor |
| 09/03/1991 | US5045112 Coal liquefaction, pyrolysis; iron reduction, melting |
| 09/03/1991 | CA1288248C Method for suppressing fuming in molten steel |
| 09/03/1991 | CA1288202C Protection of graphite electrodes |
| 08/29/1991 | WO1991013305A1 Metallurgical unit |
| 08/29/1991 | DE4030272A1 Treating metallic sludge contaminated with oil and other impurities - by superheating in shaft furnace and passing iron ore, carbon, scrap etc. into superheated melt to give steel or cast iron melt |
| 08/29/1991 | DE4006281A1 Metallurgisches aggregat Metallurgical aggregate |
| 08/29/1991 | CA2053912A1 Metallurgical unit |
| 08/28/1991 | EP0444006A1 An arrangement for installing and removing a lance into and from a metallurgical vessel and a method therefor |
| 08/27/1991 | CA2036779A1 In-furnace level meter and antenna therefor |
| 08/27/1991 | CA1287975C Self contained double o'ring slip joint and quick disconnect lance |
| 08/22/1991 | WO1991012103A1 Process and installation for renewing the refractory lining of foundry ladles |
| 08/14/1991 | EP0441767A2 An arrangement for supplying media to a blowing lance |
| 08/14/1991 | EP0440868A1 Control for a plural motor converter tilting drive |
| 08/14/1991 | CN1053816A Arrangement for installing and removing lance into and from metallurgical vessel and method therefor |
| 08/14/1991 | CN1053815A Arrangement for supplying media to blowing lance |
| 08/13/1991 | US5039480 Method for manufacturing molten metal containing Ni and Cr |
| 08/13/1991 | US5039345 Fiber composite article and method of manufacture |
| 08/13/1991 | US5039067 System that employs air to cool a metallurgical vessel in an annular support |
| 08/06/1991 | US5037069 Automatic lance changing apparatus |
| 08/03/1991 | CA2035127A1 Arrangement for installing and removing a lance into and from a metallurgical vessel and a method therefor |
| 07/30/1991 | US5035742 Reduced chromium-ore bearing powder and method for producing the same |
| 07/25/1991 | WO1991010750A1 Method for boring flue hole |
| 07/25/1991 | WO1991010749A1 Method and apparatus for preheating scrap to high temperature |
| 07/24/1991 | EP0437618A1 Method of dephosphorizing chromium-containing hot metal with lowered oxidation loss of chromium |
| 07/24/1991 | CN2081390U Rotary oxygen flow blow head of afterburning oxygen gun |
| 07/24/1991 | CN1013280B Method of decarburizing high cr molten metal |
| 07/18/1991 | DE4101155A1 Molten metal probe - has air escape openings to give bubble-free sample for automatic spectrum analysis |
| 07/17/1991 | EP0436718A1 Method of charging ore in melt-reduction |
| 07/10/1991 | EP0436063A1 Method and apparatus for introducing uniform quantities of a material into a metallurgical sample |
| 07/10/1991 | CN1052900A Production of ingot iron with solid decarbonising pig iron adn remelting in electric furnace |
| 07/09/1991 | US5029620 Method of operating a gas recovery system and apparatus for employing the method |
| 07/09/1991 | CA1285762C Plug for a refining apparatus |
| 07/02/1991 | US5028388 Method for producing chromium containing molten iron with low sulphur concentration |
| 07/02/1991 | US5028258 Process of controlling the slag in a top-blowing steelmaking converter |
| 07/02/1991 | US5028033 Process for detecting outflow of slag |
| 06/27/1991 | WO1991009143A1 Method for smelting general-purpose steel |
| 06/19/1991 | EP0432628A1 Process for increasing the life of fire-proof lining for vessels |
| 06/19/1991 | CN1052333A Process for introducing additive substances which are capable of flow into metallurgical vessel and vessel for that process |
| 06/19/1991 | CN1052270A Method for increasing durability of refractory vessel linings |
| 06/18/1991 | CA1284877C Converter for preparing steel and a gas supply device for such a converter |
| 06/13/1991 | DE3940558A1 Arc melting furnace |
| 06/05/1991 | EP0429978A1 Method of and apparatus for continuously discharging molten metal and slag |
| 06/05/1991 | CN1012738B Blast guns |
| 05/29/1991 | EP0428661A1 Device for removing worn nozzle bricks or nozzle linings from metallurgical vessels. |
| 05/28/1991 | US5018709 Refractory overcoating of hollow metal pipe |
| 05/21/1991 | US5017220 Method for smelting reduction of Ni ore |
| 05/16/1991 | DE3931024C1 Steel prodn. having low phosphor content - comprises single stage process using calcium oxide saturated residual stage from porous melt |
| 05/15/1991 | EP0427710A1 Smelting reduction |
| 05/14/1991 | US5015291 Injection magnesium nitride for desulfurization of melts |
| 05/14/1991 | US5015287 Steel melting and secondary-refining method |
| 05/04/1991 | WO1991006683A1 Process for introducing free-flowing additives into a metallurgical vessel and vessel for this process |
| 05/04/1991 | CA2044615A1 Process for introducing additive substances which are capable of flow into a metallurgical vessel and a vessel for that process |
| 05/01/1991 | CN1051081A Shrouded lance |
| 05/01/1991 | CN1012504B Comprehensive utilizing method for final steel slag of open hearch |
| 05/01/1991 | CN1012472B Plant to convert a metallic charge into semifinished products and connected smelting and casting method |
| 04/24/1991 | EP0424354A1 Converter vessel for making steel |
| 04/24/1991 | EP0288566B1 Induction plasma installation |
| 04/17/1991 | EP0423098A1 Multi-tube blowing lance |
| 04/17/1991 | EP0423003A1 Electrical connecting device to be placed on the wall of a metallurgical vessel and in contact with a molten metal |
| 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 |
| 04/10/1991 | EP0421978A1 Process for the thermal pretreatment of scrap |
| 04/09/1991 | CA1282651C Method and installation for spraying a multi-layer insulating refractory coating, and the coating thus obtained |
| 04/03/1991 | EP0420776A1 Process and installation for charging of a furnace with materials and preheating of the same |