| Patents for C21B 5 - Making pig-iron in the blast furnace (3,135) |
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| 05/13/1992 | CN1061043A Raw materials mixed feeding blast furnace iron-smelting method |
| 05/06/1992 | CN1060864A Burner for combustion of fine-grained to dusty solid fuels |
| 04/29/1992 | CN1060681A Blast furnace producing active slag by gangue |
| 04/22/1992 | EP0481955A2 Burner for the combustion of solid fuels of fine-grained to powdery consistency |
| 04/16/1992 | CA2053129A1 Burner arrangement for the combustion of fine-grained to dusty solid fuel |
| 03/17/1992 | CA1297299C Method for operating shaft furnace |
| 03/11/1992 | EP0474573A1 Process and installation for upgrading magnetic fines from ferruginous wastes resulting from the making of iron and steel |
| 03/11/1992 | CN1059370A Chromium slag detoxication and smelting method of pig iron containing chrome |
| 03/03/1992 | US5093549 Laser cutting machine |
| 03/03/1992 | CA1296530C Process and device for the metered introduction of fine-grain solid substances into an industrial furnace, in particular a blast furnace or cupola furnace |
| 01/22/1992 | EP0467375A1 Blast furnace pulverized coal injection drying apparatus |
| 01/21/1992 | CA2047416A1 Blast furnace pulverized coal injection drying apparatus |
| 01/16/1992 | DE4022181A1 Utilisation of scrap polystyrene foam - by disintegrating into coarse particles, feeding into hot air draughts in cement kiln to be incinerated and save heating |
| 01/01/1992 | CN2091866U Blast furnace with heat circulation |
| 12/10/1991 | US5070797 Process and device to feed additives into a shaft or cupola furnace |
| 10/30/1991 | CN1014530B Wet processed concentrate ore used iron smelting process in blast-furnace |
| 10/29/1991 | CA1291333C Lance for injecting highly-loaded coal slurries into the blast furnace |
| 10/24/1991 | DE4027788C1 Stabilising coke for charging blast furnace - by feeding lump coke to slowly rotating baffle drum, while wet quenching, etc. |
| 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 | CN1055390A Technology for controlling dust-laden gas temp. in front of blast furnace cloth bag dust catcher and device thereof |
| 10/10/1991 | CA2023414A1 Method of and apparatus for preheating and removing organic materials from scrap iron |
| 10/03/1991 | WO1991014791A1 Process and device for injecting coal dust and oxygen into a blast furnace |
| 09/25/1991 | EP0447908A1 Method and apparatus for the introduction of pulverized fuel into a blast furnace |
| 09/10/1991 | US5047082 Adding carbon, vlowing oxygen, discharging slag |
| 08/07/1991 | CN1013451B Comprehensive utilization of collbranite |
| 07/24/1991 | CN1013279B Method for mfg. chromium-bearing pig iron |
| 06/27/1991 | WO1991009142A1 System for measuring coal-powder fuel consumption during feeding to blast furnace tuyeres |
| 06/20/1991 | DE3941868A1 Use of sludges from waste water treatment plants - replace part of fuel in ore smelting furnaces and reduce fuel cost |
| 05/08/1991 | CN1012579B Comprehensive utilization of cr dregs by detoxicated melting cr dregs |
| 04/30/1991 | CA1283542C Process for cooling and cleaning producer gas and blast furnace gas and apparatus for performing this process |
| 04/24/1991 | CN2075652U Gas forced relaiming device from the top of blast furnace |
| 04/23/1991 | CA1283297C Device for injecting divided solids in a furnace, namely in a steel making blast furnace, and uses for said device |
| 04/03/1991 | EP0296188B1 Process and device for introducing additives into a cupola or shaft furnace |
| 03/26/1991 | CA1281907C Metallurgical composites and processes |
| 03/07/1991 | WO1991002822A1 Novel blast furnace process with economical iron and stell production |
| 03/05/1991 | US4997475 Method and device for mounting and withdrawing a plasma torch relative to an apparatus operating under pressure and temperature conditions precluding a direct intervention |
| 02/26/1991 | CA1280610C Smelting shaft furnaces for iron making and their operation |
| 02/26/1991 | CA1280609C Method of operating blast furnace |
| 01/30/1991 | CN1011418B Process for cooling and cleaning producer gas and blast furnace gas and apparatus for performing this process |
| 01/15/1991 | US4985075 Method for manufacturing chromium-bearing pig iron |
| 01/09/1991 | CN1011143B Metallurgical composites and processes |
| 01/08/1991 | CA1278680C Powdery material injection device, namely coal, for blast furnace |
| 12/11/1990 | US4976780 Blast furnace operation management method and apparatus |
| 11/20/1990 | US4972063 Device for mounting and withdrawing a plasma torch relative to an apparatus operating under pressure and temperature precluding a direct intervention |
| 10/25/1990 | DE3920223A1 Vorrichtung zum einblasen von vorerhitzter luft in einen schachtofen Device for injecting preheated air into a shaft furnace |
| 10/24/1990 | CN1046352A Comprehensive utilization of collbranite |
| 10/23/1990 | CA1275358C Process for the gasification of sewage sludge |
| 10/16/1990 | US4963186 Method for operating blast furnace by adding solid reducing agent |
| 10/16/1990 | US4963185 Olivine and iron oxide pellets from oxidative bonding |
| 10/10/1990 | EP0084559B2 Process for preparing a coal-water slurry |
| 10/03/1990 | EP0390766A1 A method of injecting an auxiliary fuel into a blast furnace |
| 09/26/1990 | CN1009736B Process for the production of pig iron |
| 09/19/1990 | CN1045423A Method for smelting reduction of ni ore |
| 09/12/1990 | EP0386407A2 Method for smelting reduction of Ni ore |
| 08/22/1990 | EP0383093A2 Method for the pneumatic and dosed injection of pulverised material into a vessel, subjected to a variable pressure |
| 08/01/1990 | CN1044300A Smelting pig iron with steel filings for nodular cast iron |
| 07/25/1990 | CN1008939B Process and apparatus for charging a shaft furnace |
| 07/17/1990 | CA1271637A1 Method of stabilizing a steel making slag |
| 07/11/1990 | CN1043745A Blast furnace operation management method and apparatus |
| 06/27/1990 | EP0375282A2 Blast furnace operation management method and apparatus |
| 06/12/1990 | CA1270310A1 Method for controlling operation of a blast furnace |
| 06/05/1990 | CA1269832A1 Process and apparatus for charging a shaft furnace |
| 05/29/1990 | CA1269688A1 Control device for plasma generators |
| 05/09/1990 | EP0367745A2 Method of injecting an auxiliary fuel into a blast furnace |
| 05/01/1990 | US4921532 Supplying iron ore and coke, injection of coal and oxygen in stoichiometric amount for carbon monoxide and hydrogen production |
| 04/17/1990 | US4917727 Method of operating a blast furnace |
| 04/11/1990 | EP0363247A1 Apparatus for positioning and withdrawing a plasma arc torch in an installation working at such a pressure and temperature that a direct intervention is impossible |
| 04/11/1990 | EP0363246A1 Apparatus for placing and withdrawing a plasma arc torch in an installation working under such a pressure and temperature that a direct intervention is impossible |
| 04/04/1990 | CN1007431B Tuyere of blast furnace |
| 04/03/1990 | US4913406 For performing smelting operations |
| 04/03/1990 | CA1267435A1 Method and means for use in the installation of plasma generators in shaft furnaces |
| 03/21/1990 | EP0358711A1 Plasma fired feed nozzle. |
| 03/14/1990 | CN1007161B Blast furnace |
| 03/14/1990 | CN1007160B Method of operating blast furnace |
| 03/07/1990 | CN1040224A Method for production of cement, potassium fertilizer, and cr contg, cast iron using detoxicated melting cr dregs |
| 02/13/1990 | US4901247 Method for controlling an operation of a blast furnace |
| 01/31/1990 | CN1006642B Iion-smelting process of comprehensive using leach slag with v, cr |
| 01/02/1990 | US4891062 Prevention of damage |
| 01/02/1990 | US4890821 Metallurgical processes |
| 12/26/1989 | US4889323 Steel making |
| 12/19/1989 | US4887800 Tuyere of blast furnace |
| 12/05/1989 | CA1263530A1 Injection of pulverulent materials by pneumatic means |
| 11/02/1989 | DE3841835C1 Process for the manufacture of re-usable products from metallic sludges containing large amounts of adhering oil or other impurities |
| 11/01/1989 | CN1036796A Wet processed concentrate ore used iron smelting process in blast-furnace |
| 10/04/1989 | CN2045388U Cas preheating device for blast furnace hot blast stove |
| 09/27/1989 | CN1035848A Technology of using vanadium-and chromium-leaching tailings in iron smelting |
| 08/17/1989 | DE3803576A1 Compressed-air conveyor and metering device |
| 08/15/1989 | US4857106 Computer controller heating |
| 07/25/1989 | US4850574 Apparatus for cooling and cleaning producer gas and top gas |
| 07/11/1989 | US4847466 Plasma torch having a longitudinally mobile arc root, and process for controlling the displacement thereof |
| 07/11/1989 | US4846884 Process for producing cold-bonded iron ore for use in a blast furnace |
| 07/05/1989 | CN1004705B Device for injecting divided solid materials in a furnace such as a smelting blast furnace, and applications |
| 07/04/1989 | US4844737 Method for operating a blast furnance by blowing pulverized coal |
| 07/04/1989 | CA1256703A1 Operating method of a smelter, namely a steelworks blast furnace |
| 06/14/1989 | EP0319836A1 Method and apparatus for operating a melting gasifier |
| 06/07/1989 | EP0319505A1 Method of ore reduction in a shaft furnace |
| 05/23/1989 | US4832539 Distribution of gas entrained particles |
| 05/23/1989 | CA1254600A1 Process and apparatus for the injection by pneumatic means of metered amounts of pulverulent materials into a vessel which is under variable pressure |
| 05/18/1989 | WO1989004445A1 System for conveying bulk materials |
| 04/25/1989 | US4824479 Method for producing a carbonaceous solid reductant for direct reduction of iron ore |