ClassID:

118767

C21B13/008 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes Use of special additives or fluxing agents

Recent Application in this class:
#1
20260139336
2026-05-21

SULFUR MANAGEMENT IN A SMELTING PROCESS

#2
20260071287
2026-03-12

METHOD OF PRODUCING REDUCED IRON

#3
20260043102
2026-02-12

NON-FIRED PELLETS FOR REDUCTION AND METHOD FOR PRODUCING SAME

#4
20250340960
2025-11-06

BIOMASS PROCESSING INTEGRATED WITH REDUCTION OF METAL ORES, SYSTEMS FOR THESE PROCESSES, AND PRODUCTS MADE THEREFROM

#5
20250283185
2025-09-11

METHOD FOR MELTING DIRECT REDUCED IRON, SOLID IRON AND METHOD FOR PRODUCING THE SAME, MATERIAL FOR CIVIL ENGINEERING AND CONSTRUCTION AND METHOD FOR PRODUCING THE SAME, AND SYSTEM FOR MELTING DIRECT REDUCED IRON

#6
20240392398
2024-11-28

METHOD FOR REFINING MOLTEN IRON

#7
20240376559
2024-11-14

METHOD FOR PRODUCING SLAG HAVING A DESIRED QUALITY

#8
20240352547
2024-10-24

IRON-CONTAINING POWDER DIRECT STEELMAKING DEVICE IN REDUCING ATMOSPHERE AND METHOD FOR USING SAME

#9
20240327936
2024-10-03

METHOD FOR RECOVERING IRON AND VALUABLE METALS FROM ELECTRIC ARC FURNACE DUST

#10
20240309475
2024-09-19

A METHOD FOR PROCESSING IRON ORE TO OBTAIN STEEL

#11
20240254591
2024-08-01

PROCESSES AND METHODS FOR BIO-EXTRACTION OF TRACE METALS FROM METAL-OXIDE CONTAINING MATERIALS

#12
20240254575
2024-08-01

A method for manufacturing direct reduced iron

#13
20230407423
2023-12-21

BIOMASS DIRECT REDUCED IRON

#14
20230203607
2023-06-29

Biomass Direct Reduced Iron

#15
20230175087
2023-06-08

Method for producing liquid pig iron from a DRI product

#16
20230131754
2023-04-27

Biomass Direct Reduced Iron

#17
20220403481
2022-12-22

System and method for the production of hot briquetted iron (HBI) containing flux and/or carbonaceous material at a direct reduction plant

#18
20220316017
2022-10-06

METHOD OF INTRODUCING A METALLIFEROUS FEED IN AN IRONMAKING PROCESS

#19
20220081733
2022-03-17

Method of manufacturing iron in a metallurgical vessel

#20
20210040572
2021-02-11

Method for off-gas composition control in a metal smelting apparatus

#21
20200399723
2020-12-24

A PROCESS FOR MANUFACTURING SELF-REDUCING PELLETS/BRIQUETTES FROM BAG HOUSE DUST MIXED WITH CARBON TO BE USED IN STEELMAKING FURNACES

#22
20190119784
2019-04-25

Method of direct reduction of chromite with cryolite additive

#23
20190048429
2019-02-14

METHOD AND SYSTEM FOR THE PRODUCTION OF POROUS IRON

#24
20180237870
2018-08-23

Binding process for pyrophoric steelmaking byproducts

#25
20170327397
2017-11-16

Method for treating animal waste

#26
20170292168
2017-10-12

Methods for mitigating the buildup of direct reduced iron clusters on the walls of a direct reduction furnace

#27
20170130284
2017-05-11

Products and processes for producing steel alloys using an electric arc furnace

#28
20160251735
2016-09-01

METHODS AND COMPOSITIONS FOR DECREASING ADHERENCE OF IRON OXIDE PELLETS USED IN DIRECT REDUCTION PROCESSES

#29
20160186276
2016-06-30

Method and apparatus for recycling top gas for shaft furnace

#30
20160160302
2016-06-09

Fluxing agent, process of its production, agglomeration mixture and use of slug from secondary metallurgy

#31
20150344989
2015-12-03

Composite briquette for steelmaking or ironmaking furnace charge

#32
20150344799
2015-12-03

Composite briquette for steelmaking or ironmaking furnace charge

#33
20150329929
2015-11-19

An Efficient Process in the Production of Iron and Steel from Iron Ore

#34
20150275323
2015-10-01

PRODUCTION OF PIG IRON

#35
20140238194
2014-08-28

Direct reduction of iron (DRI) pellet treatments

#36
20130186155
2013-07-25

Method for treating animal waste

#37
20130098204
2013-04-25

Method for producing granular metallic iron

#38
20130081516
2013-04-04

Direct production of iron slabs and nuggets from ore without pelletizing or briquetting

#39
20130055853
2013-03-07

METHOD FOR PRODUCING METALLIC IRON

#40
20130047787
2013-02-28

CARBON-MATERIAL-CONTAINING IRON OXIDE BRIQUETTE COMPOSITION, METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING DIRECT REDUCED IRON USING THE SAME

#41
20120326364
2012-12-27

Process and equipment for the production of direct reduced iron and/or pig iron from iron ores having a high-phosphorus content

#42
20120285295
2012-11-15

METHOD FOR PRODUCING METALLIC IRON NUGGETS

#43
20110308353
2011-12-22

Production of iron from metallurgical waste

#44
20110296949
2011-12-08

Process and equipment for the production of direct reduced iron and/or pig iron from iron ores having a high-phosphorus content

#45
20110185856
2011-08-04

Ironmaking and steelmaking

#46
20110179910
2011-07-28

Process for producing agglomerates of finely particulate iron carriers

#47
20110024681
2011-02-03

TITANIUM OXIDE-CONTAINING AGGLOMERATE FOR PRODUCING GRANULAR METALLIC IRON

#48
20110023657
2011-02-03

Process for producing reduced iron pellets, and process for producing pig iron

#49
20110023656
2011-02-03

METHOD FOR PRODUCING GRANULAR METALLIC IRON

#50
20100294079
2010-11-25

Metal oxide-bearing green pellets for reducing furnace, method of production of same, method of reduction of same, and reduction facility

#51
20100180723
2010-07-22

Method for manufacturing molten iron

#52
20100171072
2010-07-08

METHOD FOR MANUFACTURING GRANULAR METALLIC IRON

#53
20100164150
2010-07-01

Method and system for producing metallic iron nuggets

#54
20100107818
2010-05-06

System and method for producing metallic iron nodules

#55
20090282950
2009-11-19

PROCESS FOR PRODUCING METALLIC IRON

#56
20090183600
2009-07-23

Method for producing metallic iron

#57
20090175753
2009-07-09

Method and system for producing metallic iron nuggets

#58
20090095129
2009-04-16

Process for enhancing dry compressive strengsth in iron ore pelletizing

#59
20090031859
2009-02-05

Method for producing metallic iron

#60
20080127778
2008-06-05

Process for producing molten iron

#61
20080069763
2008-03-20

Method for manufacturing titanium oxide-containing slag

#62
20070258843
2007-11-08

METALLIC IRON NUGGETS

#63
20070256518
2007-11-08

Ironmaking and steelmaking

#64
20070227301
2007-10-04

Metallic iron nuggets

#65
20070209480
2007-09-13

Production of iron using environmentally-benign renewable or recycled reducing agents

#66
20070079666
2007-04-12

Process and plant for reducing solids containing iron oxide

#67
20060248981
2006-11-09

Granular metallic iron

#68
20060169103
2006-08-03

Process for producing particulate iron metal

#69
20060150775
2006-07-13

Method and system for producing metallic iron nuggets

#70
20060150774
2006-07-13

Method and system for producing metallic iron nuggets

#71
20060150773
2006-07-13

Method and system for producing metallic iron nuggets

#72
20060150772
2006-07-13

Method and system for producing metallic iron nuggets

#73
20060096675
2006-05-11

Method for producing metallic iron

#74
20060070495
2006-04-06

Granular metallic iron

#75
20060021469
2006-02-02

Process for producing molten iron

#76
20050028643
2005-02-10

Method for producing titanium oxide containing slag