ClassID:

118758

C21B13/002 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant Reduction of iron ores by passing through a heated column of carbon

Recent Application in this class:
#1
20260071288
2026-03-12

Hot Metal Production from DRI with Electric Arc Heating

#2
20230287528
2023-09-14

Hot Metal Production from DRI with Electric Arc Heating

#3
20220220572
2022-07-14

Process for the smelting of a metalliferous feedstock material

#4
20140224068
2014-08-14

Method and device for producing pig iron

#5
20140217653
2014-08-07

System for energy optimization in a plant for producing direct-reduced metal ores

#6
20140202285
2014-07-24

Method for treating waste gases from plants for pig iron production

#7
20140138884
2014-05-22

Device for the closed-loop control of process gases in a plant for producing directly reduced metal ores

#8
20140138883
2014-05-22

Melting reduction assembly and method for operating a melting reduction assembly

#9
20140110891
2014-04-24

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

#10
20140042677
2014-02-13

Process and device for producing pig iron or liquid steel precursors

#11
20130264753
2013-10-10

Process and plant for producing char and fuel gas

#12
20120326363
2012-12-27

METHOD AND DEVICE FOR PROVIDING REDUCTION GAS FROM GENERATOR GAS

#13
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

#14
20110285067
2011-11-24

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

#15
20110284800
2011-11-24

Method and device for producing a raw synthesis gas

#16
20110197707
2011-08-18

Method for reducing oxidic slags and dusts using inductively heated furnace

#17
20110146485
2011-06-23

Process gas purification device for a melt reduction system for extracting pig iron

#18
20110138965
2011-06-16

Process and device for producing pig iron or liquid steel precursors

#19
20110120266
2011-05-26

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

#20
20110101576
2011-05-05

Tuyere for Manufacturing Molten Iron and Method for Injecting Gas Using the Same

#21
20110030507
2011-02-10

Process and apparatus for producing liquid pig iron or liquid primary steel products

#22
20100283192
2010-11-11

Reducing furnace and apparatus for manufacturing molten iron comprising the same

#23
20100270715
2010-10-28

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

#24
20100263487
2010-10-21

Process and plant for producing char and fuel gas

#25
20100031771
2010-02-11

Method for reducing oxidic slags and dusts and inductively heatable furnance for carrying out this method

#26
20100024599
2010-02-04

METHOD AND DEVICE FOR PRODUCING MOLTEN MATERIAL

#27
20100024595
2010-02-04

Method and apparatus for treating return ores using plasma

#28
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

#29
20090090217
2009-04-09

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

#30
20090008841
2009-01-08

Apparatus for manufacturing molten irons

#31
20080302212
2008-12-11

Apparatus for manufacturing molten irons

#32
20080295647
2008-12-04

Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same

#33
20080290566
2008-11-27

Method and device for producing pig iron and/or pig iron intermediate products

#34
20080277842
2008-11-13

Apparatus for manufacturing molten irons

#35
20080196549
2008-08-21

Direct reduction process using a single fluidised bed

#36
20070235909
2007-10-11

Apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and apparatus for manufacturing molten irons using the same

#37
20060273497
2006-12-07

Method and installation for utilizing hydrocarbon-containing and iron-oxide-containing waste materials, in particular rolling scale sludges, and fine coals

#38
20060182555
2006-08-17

Method and device for distributing a lumpy bulk material

#39
20060162499
2006-07-27

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

#40
20060119023
2006-06-08

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

#41
20060119022
2006-06-08

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

#42
20050151307
2005-07-14

Method and apparatus for producing molten iron

#43
20050126341
2005-06-16

Method and device for producing pig iron and/or pig iron intermediate products