| Patents for C21B 11 - Making pig-iron other than in blast furnaces (2,381) |
|---|
| 03/29/1994 | US5298056 Direct steel-making process |
| 03/15/1994 | US5294243 Continuous monitoring of slag content and viscosity; adjustment with fluxing agent and glass or gravels |
| 03/03/1994 | WO1994004633A1 Improved molten metal decomposition apparatus and process |
| 03/03/1994 | CA2140876A1 Improved molten metal decomposition apparatus and process |
| 03/01/1994 | CA1327274C Method of recovering metals and metal alloys and a plant therefor |
| 02/23/1994 | CN1082614A Smelting furnace by open caisson method |
| 02/16/1994 | EP0583164A1 The production of stainless steel |
| 02/16/1994 | EP0583126A1 The production of high titania slag from ilmenite |
| 02/12/1994 | CA2103843A1 Production of stainless steel |
| 02/03/1994 | DE4325531A1 Reduced ferrite powder for vehicle brake system friction elements - includes oxide(s) of silicon, magnesium, calcium, aluminium and zinc. |
| 12/28/1993 | CA1325519C Method for preparing ferrocarbon intermediate product for use in steel manufacture and furnace for realization thereof |
| 12/21/1993 | US5271609 Plant comprising a shaft |
| 12/16/1993 | DE4224055C1 Redn. of iron@ ore into solid metallised ferrous prod. - moves ferrous sludge briquettes with min. heat loss to the refining vessel to save energy consumption |
| 11/17/1993 | CN1078499A A smelting reduction method with high productivity |
| 11/16/1993 | CA1324265C Method of recovering metals and metal alloys and a plant therefor |
| 10/27/1993 | CN1022573C Prereduction furnace of smelting reduction facility of iron ore |
| 10/06/1993 | EP0563828A1 Method of melting metals |
| 10/06/1993 | EP0563559A2 A smelting reduction method with higher productivity |
| 09/29/1993 | EP0562635A1 Method of melting metals |
| 09/22/1993 | CN1022191C Process of and apparatus for post combustion |
| 09/21/1993 | US5246482 Molten metal producing and refining method |
| 09/14/1993 | US5244488 Direct smelting process with a thermal plasma |
| 09/08/1993 | EP0422004B1 Method and apparatus for reduction of material containing metal oxide |
| 09/08/1993 | CN1022048C Process and apparatus for making molten iron |
| 08/31/1993 | US5240496 Pretreatment of chromium-bearing metal scrap to remove chromium |
| 08/24/1993 | US5238487 Process for the production of pig iron and sponge iron |
| 08/24/1993 | US5238486 Method and furnace for production of liquid iron |
| 08/11/1993 | CN1075201A Circulating fluidized bed furnace for pre-reduction of fine iron ore |
| 07/21/1993 | EP0551992A1 Process for recovering valuable metals from an iron dust |
| 07/20/1993 | US5229064 Having at least two raw material supply ports and two reductive gas supply ports; improved mixing and dispersion |
| 07/14/1993 | EP0551217A1 Direct steel-making process |
| 07/06/1993 | US5224985 Process and apparatus for the melting of metals in the cupola furnace operated without coke |
| 06/30/1993 | EP0548182A1 Metal-melting furnaces. |
| 06/16/1993 | CN2136249Y Smelting furnace by well-sinking method |
| 06/08/1993 | US5217658 Cooling by feeding liquid nitrogen while removing slag from interior wall, then coating a refractory linings |
| 05/27/1993 | DE4139236A1 Melting of pig iron@ without coking coal - comprises allowing agglomerate of ore, coal and bonding agent to stream down from top of cupola furnace, heating with gas stream and contacting with bed of ceramic spheres |
| 05/26/1993 | CN1020953C Dc electric-arc furnace with arc-controlling megnetic mirror |
| 05/25/1993 | CA1318134C Method for transferring heat to molten metal, and apparatus therefor |
| 05/12/1993 | EP0302111B1 Method and furnace for making iron-carbon intermediate products for steel production |
| 05/12/1993 | CN1071957A Process for production of iron |
| 04/21/1993 | CN1071203A Metal refining method |
| 04/01/1993 | WO1993006251A1 Process for production of iron |
| 03/31/1993 | EP0534020A1 Molten metal producing and refining method |
| 03/30/1993 | US5198019 Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer |
| 03/17/1993 | CN1020115C Method for producing chromium-containing molten iron with low sulphur concentration |
| 01/27/1993 | EP0524399A2 Two-zone countercurrent smelter system |
| 01/27/1993 | CA2069560A1 Two-zone countercurrent smelter system |
| 01/26/1993 | CA1313044C Melting gasifier |
| 01/07/1993 | EP0521523A1 Process for running a cupola |
| 12/02/1992 | EP0516613A1 Plant comprising a shaft, in particular a reduction shaft furnace |
| 12/01/1992 | CA1310827C Apparatus for charging a melting gasifier with gasification media and sponge iron |
| 12/01/1992 | CA1310826C Method for operating a melt-down gasifier and melt-down gasifier for the implementation of said method |
| 11/18/1992 | CN1019136B Method for prodn. of ferrocarbon intermediate product for use in steel prodn. |
| 11/11/1992 | CN1019025B Method and apparatus for reduction of material containing metal oxide |
| 11/04/1992 | CN1065883A Process for production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out process |
| 10/27/1992 | US5158590 Process for melting and refining a charge |
| 09/22/1992 | US5149363 Using self-reduction furnace; full burining of fuels to carbon dioxide and water for attaining high energy and combustion of carbon monooxide produced at the interior of furnace |
| 09/22/1992 | US5149062 Prereduction furnace of a smelting reduction facility of iron ore |
| 09/17/1992 | DE4108283A1 Verfahren zum herstellen von fluessigem metall aus feinkoernigen metalloxidpartikeln und reduktions- und schmelzofen zur durchfuehrung des verfahrens Method for the manufacture of liquid metal from feinkoernigen metal oxide and reduction and melting furnace for performing the method |
| 09/15/1992 | WO1992016663A1 Process and reduction and melting furnace for producing liquid metal from fine metal oxide particles |
| 09/03/1992 | DE4042176A1 Verfahren zur reduktion von metalloxiden im schmelzfluessigen zustand A process for the reduction of metal oxides in the state schmelzfluessigen |
| 08/19/1992 | CN1017920B Method of and apparatus for melting metal waste |
| 08/04/1992 | CA1305862C Method and plant for fully continuous production of steel strip from ore |
| 07/29/1992 | CN1017628B Method for smelting molten iron directly from powdered coal and iron ore |
| 06/30/1992 | WO1992012265A1 Reduction of metal oxides |
| 06/28/1992 | WO1992012264A1 Fluidized bed preliminary reducing furnace for raw material comprising oxide |
| 06/23/1992 | US5123631 Method of and apparatus for continuously discharging molten metal and slag |
| 06/03/1992 | EP0488429A2 Apparatus for manufacturing iron by melting and reduction |
| 06/03/1992 | EP0487856A2 Process for producing pig iron or reduced iron |
| 05/20/1992 | CN1016704B Process for reduction smelting iron ore |
| 05/20/1992 | CN1016703B Process and apparatus for post combustion |
| 03/19/1992 | WO1992004587A1 Metal-melting furnaces |
| 03/11/1992 | EP0449891A4 Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer |
| 02/19/1992 | CN1058807A Process of and apparatus for post combustion |
| 01/28/1992 | US5084093 Method for manufacturing molten pig iron |
| 01/13/1992 | CA2086943A1 Process for making as-cast ferritic spheroidal graphitic ductile iron |
| 01/07/1992 | US5078787 Method and apparatus for the production of hot direct reduced iron |
| 01/07/1992 | US5078785 Monitoring and controlling slag density in steelmaking, monitoring carbon content of slag |
| 01/01/1992 | CN1057486A Method and apparatus for production of hot direct reduced iron |
| 12/26/1991 | WO1991019819A1 Method and apparatus for steel making |
| 12/04/1991 | EP0459810A2 Method and apparatus for the production of hot direct reduced iron |
| 12/03/1991 | US5069715 Separate control of carburization and heating functions |
| 11/19/1991 | US5066325 Liquiefaction of coal to remove oil; pelletization, reduction, melting, forming mineral wool; electricity |
| 11/19/1991 | US5065985 Method for smelting reduction of iron ore and apparatus therefor |
| 11/12/1991 | US5064467 Method and apparatus for the direct reduction of iron |
| 10/30/1991 | CN1055763A Process for producing metals and metal alloys in smelt reduction vessel |
| 10/09/1991 | EP0449891A1 Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer. |
| 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 |
| 09/19/1991 | WO1991014005A1 A process for producing metals and metal alloys in a smelt reduction vessel |
| 09/18/1991 | EP0447300A1 Method for melting and refining a batch |
| 09/18/1991 | EP0446860A1 A process for producing metals and metal alloys in a smelt reduction vessel |
| 09/11/1991 | CN1054447A Prereduction furnace of smelting reduction facility of iron ore |
| 09/11/1991 | CN1054446A Prereduction furnace of smelting reduction facility of iron ore |
| 09/04/1991 | EP0444614A2 Prereduction furnace of a smelting reduction facility of iron ore |
| 09/03/1991 | US5045112 Coal liquefaction, pyrolysis; iron reduction, melting |
| 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 |
| 08/27/1991 | US5043011 Process for producing pig iron |
| 08/27/1991 | CA1287982C Method for melt-reducing iron ore |
| 08/21/1991 | EP0442040A2 Method and apparatus for direct reduction of metal oxides |
| 08/14/1991 | CA2030083A1 Method and apparatus for direct reduction of metal oxides |