ClassID:

118782

C21B13/143 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes; Multi-stage processes processes carried out in different vessels or furnaces Injection of partially reduced ore into a molten bath

Recent Application in this class:
#1
20260043103
2026-02-12

OPTIMIZED MELTING OF COMPACTED DRI

#2
20230203606
2023-06-29

Biomass Direct Reduced Iron

#3
20220316017
2022-10-06

METHOD OF INTRODUCING A METALLIFEROUS FEED IN AN IRONMAKING PROCESS

#4
20220220572
2022-07-14

Process for the smelting of a metalliferous feedstock material

#5
20210214812
2021-07-15

Method and apparatus for the production of cast iron, cast iron produced according to said method

#6
20190085420
2019-03-21

Direct reduced iron (DRI) heat treatment, products formed therefrom, and use thereof

#7
20180274047
2018-09-27

Method and apparatus for the production of cast iron, cast iron produced according to said method

#8
20180010202
2018-01-11

Method for manufacturing reduced iron

#9
20170233840
2017-08-17

Solid agglomerate of fine metal particles comprising a liquid oily lubricant and method for making same

#10
20160326606
2016-11-10

METHODS FOR PRODUCING IMPROVED STEELS BY INJECTING IRON CONTAINING BY-PRODUCTS OF AN IRON ORE PRODUCTION PROCESS INTO LIQUID STEEL

#11
20160312321
2016-10-27

Smelting process and apparatus

#12
20150345870
2015-12-03

Molten iron manufacturing apparatus and molten iron manufacturing method

#13
20150345869
2015-12-03

Reformer gas-based reducing method with reduced NOemission

#14
20150135899
2015-05-21

Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit

#15
20150040722
2015-02-12

Iron reduction process and equipment

#16
20140352494
2014-12-04

Methods and systems for producing ferro-chrome in a duplex furnace

#17
20140331821
2014-11-13

Producing of pig iron from iron-containing materials

#18
20140202285
2014-07-24

Method for treating waste gases from plants for pig iron production

#19
20140196571
2014-07-17

Process and device for charging into a smelting unit

#20
20140138883
2014-05-22

Melting reduction assembly and method for operating a melting reduction assembly

#21
20140110891
2014-04-24

Method and device for charging coal-containing material and iron carrier material

#22
20140042677
2014-02-13

Process and device for producing pig iron or liquid steel precursors

#23
20130139647
2013-06-06

Partially-reduced iron producing method and partially-reduced iron producing apparatus

#24
20130118306
2013-05-16

Process and plant for producing hot metal

#25
20120326363
2012-12-27

METHOD AND DEVICE FOR PROVIDING REDUCTION GAS FROM GENERATOR GAS

#26
20120325053
2012-12-27

Apparatus and methods for producing direct reduced iron

#27
20120313300
2012-12-13

Process and apparatus for producing metals and/or primary metal products

#28
20120279356
2012-11-08

Process and device for charging into a smelting unit

#29
20120237421
2012-09-20

Method for Removing CO2 From Exhaust Gases, Such as Exhaust Gases From Plants for Producing Raw Iron or Exhaust Gases From Syngas Plants

#30
20120174711
2012-07-12

Apparatus for manufacturing reduced iron and method for manufacturing the same

#31
20120160062
2012-06-28

Reformer gas-based reducing method with reduced NO emission

#32
20120125151
2012-05-24

Integrated steel plant with production of hot or cold DRI

#33
20110290075
2011-12-01

Nozzle for injecting gas containing oxygen into a pig iron device having an injector insertion pipe

#34
20110285067
2011-11-24

METHOD FOR PRODUCING LIQUID PIG IRON OR LIQUID STEEL INTERMEDIATE PRODUCTS FROM FINE-PARTICLED MATERIAL CONTAINING IRON OXIDE

#35
20110284800
2011-11-24

Method and device for producing a raw synthesis gas

#36
20110226092
2011-09-22

Process for producing molten iron and apparatus for producing molten iron

#37
20110179910
2011-07-28

Process for producing agglomerates of finely particulate iron carriers

#38
20110138965
2011-06-16

Process and device for producing pig iron or liquid steel precursors

#39
20110120266
2011-05-26

Method and system for energy-optimized and COemission-optimized iron production

#40
20110101577
2011-05-05

Conveyor system, composite system and method for coupling metallurgical methods

#41
20110094337
2011-04-28

Steelmaking facility comprising a direct reduction plant and an electric-arc furnace

#42
20110036204
2011-02-17

METHOD FOR PRODUCING REDUCED IRON

#43
20110011211
2011-01-20

Metallurgical process and plant therefor

#44
20100288078
2010-11-18

Process for producing stainless steel using direct reduction furnaces for ferrochrome and ferronickel on the primary side of a converter

#45
20100283192
2010-11-11

Reducing furnace and apparatus for manufacturing molten iron comprising the same

#46
20100270715
2010-10-28

Apparatus for manufacturing molten irons by hot compacting fine direct reduced irons

#47
20100229685
2010-09-16

Process for producing molten iron

#48
20100218646
2010-09-02

Producing method of direct reduced iron

#49
20100043599
2010-02-25

Method and device for producing molten material

#50
20100024599
2010-02-04

METHOD AND DEVICE FOR PRODUCING MOLTEN MATERIAL

#51
20100011908
2010-01-21

PRESSURE CONTROL IN DIRECT SMELTING PROCESS

#52
20090320647
2009-12-31

Pressure control in direct smelting process

#53
20090308205
2009-12-17

DIRECT SMELTING PLANT WITH WASTE HEAT RECOVERY UNIT

#54
20090308074
2009-12-17

Apparatus for generating energy using a sensible heat during manufacturing of molten iron and method for generating energy using the same

#55
20090090217
2009-04-09

Method for producing liquid pig iron or liquid steel intermediate products from fine-particled material containing iron oxide

#56
20090090216
2009-04-09

Process for producing molten iron and apparatus for producing molten iron

#57
20090008841
2009-01-08

Apparatus for manufacturing molten irons

#58
20080302212
2008-12-11

Apparatus for manufacturing molten irons

#59
20080289450
2008-11-27

Conveyor system, composite system and method for coupling metallurgical methods

#60
20080277842
2008-11-13

Apparatus for manufacturing molten irons

#61
20080236335
2008-10-02

Method and system for the supply of hot direct reduced iron for multiple uses

#62
20080069763
2008-03-20

Method for manufacturing titanium oxide-containing slag

#63
20080047397
2008-02-28

Process and apparatus for producing metals and/or primary metal products

#64
20080000327
2008-01-03

Method and apparatus for charging hot direct reduced iron from hot transport vessels into a melter or finisher

#65
20070295165
2007-12-27

Process for Producing Molten Iron and Apparatus Therefor

#66
20070272058
2007-11-29

Direct smelting plant and process

#67
20070113708
2007-05-24

FERRONICKEL AND PROCESS FOR PRODUCING RAW MATERIAL FOR FERRONICKEL SMELTING

#68
20060272452
2006-12-07

Production of iron

#69
20060243583
2006-11-02

High pressure dry coal slurry extrusion pump

#70
20060196312
2006-09-07

Thermal synthesis production of steel

#71
20060196311
2006-09-07

Thermal synthesis production of steel

#72
20060162499
2006-07-27

Apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same

#73
20060119023
2006-06-08

Apparatus for manufacturing molten irons to improve operation of fluidized bed type reduction apparatus and manufacturing method using the same

#74
20060119022
2006-06-08

Apparatus for manufacturing molten irons to dry and convey iron ores and additives and manufacturing method using the same

#75
20050284262
2005-12-29

Metallurgical vessel

#76
20050211020
2005-09-29

Ferronickel and process for producing raw material for ferronickel smelting

#77
20050151307
2005-07-14

Method and apparatus for producing molten iron

#78
20050028643
2005-02-10

Method for producing titanium oxide containing slag