| Patents for C21B 5 - Making pig-iron in the blast furnace (3,135) |
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| 02/23/1982 | US4316740 Low-sulfur pig iron, coal combustion with limestone |
| 02/09/1982 | CA1117884A1 In-line method for the beneficiation of coal and the formation of a coal-in-oil combustible fuel therefrom |
| 02/02/1982 | US4314241 Coal pipe monitor |
| 02/02/1982 | US4313822 Method for recovering the lead and zinc values in secondary scrubber muds from blast furnace gases |
| 01/20/1982 | EP0044096A1 Process and apparatus for the injection of solid fuel into the hot blast pipe of a shaft furnace |
| 01/20/1982 | EP0044095A1 Method and apparatus for the uniform pneumatic conveyance of finely divided solids and application to the injection of solid fuels into a shaft furnace |
| 01/13/1982 | EP0043607A1 Method and apparatus for the uniform pneumatic conveyance of finely divided solids and application to the injection of solid fuels into a shaft furnace |
| 01/13/1982 | EP0043606A1 Method and apparatus for the uniform pneumatic conveyance of finely divided solids and application to the injection of solid fuels into a shaft furnace |
| 12/24/1981 | WO1981003668A1 Improved multi-purpose zone controlled blast furnace and method of producing hot metal,gases and slags |
| 12/23/1981 | EP0042147A1 Improved multi-purpose zone controlled blast furnace and method of producing hot metal, gasses and slags |
| 12/22/1981 | US4306507 Method of controlling the heat balance in a shaft-type metallurgical furnace |
| 11/26/1981 | WO1981003341A1 Method of feeding powder-like fuel mixture to blast furnace tuyeres |
| 11/26/1981 | WO1981003340A1 Aeration feeder for coal dust supply to blast furnace hearth |
| 11/17/1981 | USRE30795 Green balls formed by agglomerating wet-collected fume produced in metallurgical furnaces |
| 10/21/1981 | EP0037832A1 Coal-water slurry and method for its preparation. |
| 10/14/1981 | EP0037460A1 Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container |
| 09/29/1981 | CA1109679A1 Method for manufacturing pellets |
| 09/22/1981 | US4290803 Process for dephosphorization and denitrification of chromium-containing pig iron |
| 09/17/1981 | WO1981002584A1 Carbonaceous fines in an oxygen-blown blast furnace |
| 09/15/1981 | CA1108863A1 Process for perishing waste rubber materials, especially worn out motor vehicle rubber tyres by recovering their components for industrial purposes |
| 08/04/1981 | US4282006 Heat energy |
| 07/22/1981 | EP0032206A1 Process for pneumatically injecting dosed quantities of finely divided solids into a vessel maintained at variable pressure |
| 07/14/1981 | CA1104827A1 Process for treating a mud produced during gas scrubbing in a blast furnace or a steelworks |
| 06/30/1981 | US4276053 Solvent refined coal, oil dispersion |
| 06/16/1981 | US4273577 For reduction of ores with coke, controlling thermal balance |
| 06/03/1981 | EP0029712A2 An in-line method for the upgrading of coal |
| 05/19/1981 | CA1101204A1 Process for further use of direct reduction blast furnace gas |
| 05/12/1981 | US4266968 In which the velocity of the coal moving towards the center of the furnace is lower than the velocity of the hot blast entering the furnace |
| 05/06/1981 | EP0027909A1 Installation for conveying fine-grained material |
| 04/30/1981 | WO1981001152A1 Coal-water slurry and method for its preparation |
| 04/22/1981 | EP0027320A1 Method for lower-rate operation of blast furnace |
| 04/21/1981 | CA1099519A1 Fired iron-ore pellets having at least two different precipitated slag phases and process for producing the same |
| 03/18/1981 | EP0025279A2 A method for the preparation of a uniform solid fuel-oil dispersion |
| 03/18/1981 | EP0025278A2 A method for the preparation of a uniform dispersion of a friable solid fuel, oil and water and the obtained fuel-oil-water dispersion |
| 03/11/1981 | EP0024847A2 A method for the preparation of a uniform dispersion of a friable solid fuel, oil and water |
| 02/18/1981 | EP0024054A1 Method and apparatus for the pneumatic conveying of fine-grained solids |
| 02/11/1981 | EP0023878A1 Process for controlling the internal heat in a shaft furnace and means used therefor |
| 02/10/1981 | US4250027 Scouring |
| 02/10/1981 | CA1095255A1 Process for upgrading iron ore pellets |
| 02/03/1981 | US4248627 Process for the manufacture and use of high purity carbonaceous reductant from carbon monoxide-containing gas mixtures |
| 02/03/1981 | US4248625 Method of operating a blast furnace |
| 02/03/1981 | US4248624 Containing ferric carbide |
| 01/27/1981 | US4247732 Method and apparatus for electrically firing an iron blast furnace |
| 01/27/1981 | CA1094609A1 Apparatus and method for injecting particulate solid material into a pressurized process apparatus |
| 01/21/1981 | EP0022549A1 Process and apparatus for the injection of solid fuel into a shaft furnace |
| 01/13/1981 | US4244180 Process for producing fuel gases from carbonaceous material |
| 01/07/1981 | EP0021601A1 Process for regenerating a reducing gas mixture from spent gas evolved in the production of sponge iron |
| 01/07/1981 | EP0021222A1 Process and apparatus for dosing and for pneumatically conveying and feeding solid materials to a vessel maintained under pressure |
| 12/16/1980 | US4239426 Method of transporting and storing mixed fuel and plant therefor |
| 10/29/1980 | EP0018235A1 Production of reducing gas for furnace injection |
| 10/14/1980 | US4227921 Method of controlling a blast furnace operation |
| 09/23/1980 | CA1086066A1 Air injection nozzles and method for a blast furnace |
| 09/16/1980 | CA1085618A1 Fuel injection in blast furnaces |
| 09/02/1980 | US4220469 Combustion of coal-water suspension, mixing with reduction furnace waste gases, quenching slag, scrubbing, reduction |
| 08/12/1980 | CA1083327A1 Method of removing nitrogen oxides from an exhaust |
| 07/22/1980 | US4213778 Process for treating a mud produced during gas scrubbing in a blast furnace or a steelworks |
| 06/25/1980 | EP0012607A1 Fuel composition and method for its preparation |
| 06/25/1980 | EP0012606A1 Method for the preparation of a fuel composition |
| 06/24/1980 | CA1079978A1 Method for agglomerating wet-collected fume for use in metallurgical furnaces and agglomerates produced thereby |
| 04/22/1980 | US4199349 Production of sponge iron |
| 04/22/1980 | CA1075900A1 Process for preparing blast furnace cokes |
| 04/15/1980 | US4198228 Carbonaceous fines in an oxygen-blown blast furnace |
| 04/08/1980 | US4197495 System for controlling the charge distribution and flow in blast furnace operations using magnetic sensors positioned within the charge |
| 04/08/1980 | US4197115 Grinding easy-to-grind, strength-enhancing ore, mixing with hard-to-grind ore, pelletization |
| 04/08/1980 | CA1075011A1 Method and means for remelting scrap iron, iron sponge, pellets or the like |
| 04/01/1980 | CA1074567A1 Method of continuously melting down scrap, iron sponge or the like |
| 02/26/1980 | CA1072656A1 Installation for controlling pressure of gas under shaft top in super-capacity blast furnace |
| 02/12/1980 | US4188205 Fuel injection in blast furnaces |
| 01/15/1980 | CA1069699A1 Producing hot reducing gas |
| 12/25/1979 | US4180249 Installation for controlling pressure of gas under shaft top in super-capacity blast furnace |
| 11/27/1979 | US4175949 Process for perishing waste rubber materials, especially worn out motor vehicle rubber tires by recovering their components for industrial purposes |
| 11/20/1979 | CA1066503A1 Continuous blast furnace gas analysis for supervision and regulation of the blast furnace operation |
| 11/06/1979 | CA1065794A1 Method of reducing ores |
| 10/23/1979 | US4171971 From iron oxide or pig iron in a shaft furnace |
| 10/23/1979 | CA1064706A1 Process of olivine useage in blast furnace, agglomerates containing olivine and process for their preparation and use |
| 10/03/1979 | EP0004373A2 Method and apparatus for operating an iron producing blast furnace |
| 10/02/1979 | US4169723 Process of melting blast-furnace cast-iron |
| 09/25/1979 | CA1063135A1 Weigher permitting load cell replacement during operation |
| 08/21/1979 | US4165221 Formed carbon fuel briquettes, process for forming the same and process for utilizing the same in the manufacture of steel |
| 08/08/1979 | EP0003464A1 Process for the utilization of lead and zinc present in the mud resulting from the secundary scrubbing of blast furnace exhaust gases |
| 08/07/1979 | CA1060107A1 Polyphase arc heater system |
| 07/31/1979 | USRE30060 Drying, fracturing, balling |
| 07/03/1979 | US4159905 Method of manufacturing green hot briquettes from fine coal for use in shaft furnaces |
| 05/08/1979 | US4153426 Synthetic gas production |
| 05/08/1979 | US4153421 Stabilized fuel slurry |
| 05/01/1979 | CA1053471A1 Selective reduction of oxidized ore |
| 04/03/1979 | US4147539 Briquets containing alumina, an alkali metal base and montmorillonite, sodium aluminate, aluminum silicate zeolite, or aluminum phosphate as binder |
| 04/03/1979 | CA1051659A1 Liquid-fuel atomization and injection device |
| 03/13/1979 | US4144053 Processes for blast furnace operations |
| 03/13/1979 | CA1050265A1 Apparatus for injection of hot reducing gas into a shaft |
| 02/27/1979 | CA1049258A1 Method of detecting abnormal conditions of blast furnaces |
| 02/20/1979 | CA1048761A1 Conduit |
| 02/06/1979 | US4138098 Method of blowing smelting shaft furnaces and tuyeres used for said blowing |
| 01/23/1979 | CA1047074A1 Disperser |
| 01/02/1979 | US4132546 Smelting of iron ore with partially dried lignite |
| 12/05/1978 | CA1043575A1 Method and device for melting metals |
| 12/05/1978 | CA1043574A1 Method and apparatus for producing iron from oxidic iron ores |
| 12/05/1978 | CA1043563A1 Method and arrangement for increasing the blast temperature for a shaft furnace |
| 11/28/1978 | US4127259 Apparatus for controlling the injection of oil into a blast furnace |
| 09/26/1978 | US4116680 Blast furnace with oxygen instead of air |