Assignee
HYLSA SA
67 patents
Top patents by PatentIndex Score
US5656044AAug 12, 1997
Method and apparatus for gasification of organic materials
HYLSA SA57 citations95
US6027545AFeb 22, 2000
Method and apparatus for producing direct reduced iron with improved reducing gas utilization
HYLSA SA57 citations94
US5851246ADec 22, 1998
Apparatus for gasifying organic materials
HYLSA SA42 citations92
US5425792AJun 20, 1995
Method for gasifying organic materials
HYLSA SA30 citations92
US5110350AMay 5, 1992
Method of reducing iron ore
HYLSA SA26 citations91
US6871457B2Mar 29, 2005
Vessel for enabling a uniform gravity driven flow of particulate bulk material therethrough, and direct reduction reactor incorporating same
HYLSA SA37 citations89
US6039916AMar 21, 2000
Apparatus for producing direct reduced iron with a controlled amount of carbon
HYLSA SA23 citations89
US5858057AJan 12, 1999
Method for producing direct reduced iron with a controlled amount of carbon
HYLSA SA35 citations89
US5676732AOct 14, 1997
Method for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide
HYLSA SA33 citations89
US5445363AAug 29, 1995
Apparatus for the pneumatic transport of large iron-bearing particles
HYLSA SA36 citations89
US5296015AMar 22, 1994
Method for the pneumatic transport of large iron-bearing particles
HYLSA SA26 citations89
US4449671AMay 22, 1984
Apparatus for separating agglomerated particulate matter
HYLSA SA27 citations89
US6395056B1May 28, 2002
Method for the heat treatment of iron ore lumps in a reduction system
HYLSA SA32 citations88
US6986800B2Jan 17, 2006
Method and apparatus for improved use of primary energy sources in integrated steel plants
HYLSA SA36 citations85
US6039283AMar 21, 2000
Thin strip coiling system
HYLSA SA40 citations85
US4714597ADec 22, 1987
Corrosion inhibitor for CO2 absorption process using alkanolamines
HYLSA SA56 citations85
US5766542AJun 16, 1998
Refractory bricks for iron ore reduction reactors
HYLSA SA23 citations83
US6224649B1May 1, 2001
Method and apparatus for reducing iron-oxides-particles having a broad range of sizes
HYLSA SA16 citations82
US6379421B1Apr 30, 2002
Method and apparatus removing undesirable metals from iron-containing materials
HYLSA SA25 citations81
US4880458ANov 14, 1989
Start-up method for a direct reduction process without an external reformer
HYLSA SA22 citations81
US4637034AJan 13, 1987
Cooling panel for electric arc furnace
HYLSA SA33 citations81
US4253867AMar 3, 1981
Method of using a methane-containing gas for reducing iron ore
HYLSA SA20 citations81
US4834792AMay 30, 1989
Method for producing hot sponge iron by introducing hydrocarbon for carburizing into reduction zone
HYLSA SA21 citations80
US4747872AMay 31, 1988
Process and apparatus for producing high purity iron
HYLSA SA20 citations79
US4224057ASep 23, 1980
Method for carburizing sponge iron
HYLSA SA23 citations79
US6183535B1Feb 6, 2001
Method for increasing the capacity of a direct reduced iron plant without increasing its reformer capacity
HYLSA SA16 citations77
US4336063AJun 22, 1982
Method and apparatus for the gaseous reduction of iron ore to sponge iron
HYLSA SA24 citations77
US4556417ADec 3, 1985
Process for the direct reduction of iron ores
HYLSA SA22 citations75
US4578110AMar 25, 1986
Method of reducing iron oxides
HYLSA SA10 citations72
US4528030AJul 9, 1985
Method of reducing iron ore
HYLSA SA18 citations72
US4261734AApr 14, 1981
Method of making sponge iron
HYLSA SA11 citations72
US6132489AOct 17, 2000
Method and apparatus for reducing iron-oxides-particles having a broad range of sizes
HYLSA SA11 citations71
US4375983AMar 8, 1983
Method of making sponge metal
HYLSA SA10 citations71
US5882579AMar 16, 1999
Apparatus for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide
HYLSA SA14 citations70
US4897113AJan 30, 1990
Direct reduction process in reactor with hot discharge
HYLSA SA18 citations70
US4734128AMar 29, 1988
Direct reduction reactor with hot discharge
HYLSA SA13 citations70
US4608240AAug 26, 1986
Method for the desulfurization of hydrocarbon gas
HYLSA SA9 citations70
US4427136AJan 24, 1984
Rotary valve
HYLSA SA19 citations70
US4427135AJan 24, 1984
Rotary valve
HYLSA SA18 citations70
US4248624AFeb 3, 1981
Use of prereduced ore in a blast furnace
HYLSA SA28 citations70
US4725309AFeb 16, 1988
Method and apparatus for producing hot direct reduced iron
HYLSA SA17 citations68
US4668284AMay 26, 1987
Method of reducing iron ore
HYLSA SA10 citations68
US4584016AApr 22, 1986
Method for controlling metallization and carburization in the reduction of metal ores to sponge iron
HYLSA SA15 citations68
US4370162AJan 25, 1983
Method for the gaseous reduction of iron ore to sponge iron
HYLSA SA15 citations68
US4428772AJan 31, 1984
Method for reducing metal ore
HYLSA SA11 citations67
US4412858ANov 1, 1983
Method of converting iron ore into molten iron
HYLSA SA18 citations67
US6290434B1Sep 18, 2001
Expansion joint for high-pressure high-temperature pneumatic transport of DRI or other abrasive particles
HYLSA SA11 citations66
US5078787AJan 7, 1992
Method and apparatus for the production of hot direct reduced iron
HYLSA SA18 citations66
US4793856ADec 27, 1988
Process for the direct reduction of iron ores
HYLSA SA13 citations66
US5181954AJan 26, 1993
Method for coating iron-bearing particles to be processed in a direct reduction process
HYLSA SA12 citations62
Showing the top 50 of 67 patents by PatentIndex Score.