ClassID:

118761

C21B13/004 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores

Recent Application in this class:
#1
20260055477
2026-02-26

A DIRECT REDUCTION FACILITY AND A METHOD OF DIRECT REDUCTION OF METAL OXIDE

#2
20260049370
2026-02-19

A DIRECT REDUCTION FACILITY FOR REDUCTION OF A METAL OXIDE MATERIAL

#3
20250354226
2025-11-20

METHOD AND AN ARRANGEMENT FOR A CONTINUOUS PRODUCTION OF SPONGE IRON FROM IRON ORE

#4
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

#5
20250263807
2025-08-21

METHOD AND AN ARRANGEMENT FOR A CONTINUOUS PRODUCTION OF SPONGE IRON FROM IRON ORE

#6
20250230512
2025-07-17

ARRANGEMENT AND PROCESS FOR CHARGING IRON ORE TO, AND/OR DISCHARGING SPONGE IRON FROM, A DIRECT REDUCTION SHAFT

#7
20250163525
2025-05-22

METHOD OF REDUCING IRON ORE POWDER

#8
20250128489
2025-04-24

APPARATUS FOR SUBDIVIDING AS BRIQUETTE STRAND

#9
20250128488
2025-04-24

APPARATUS FOR SUBDIVIDING A STRAND OF BRIQUETTES

#10
20240271232
2024-08-15

METHOD FOR PRODUCING STEEL IN AN INTEGRATED METALLURGICAL PLANT

#11
20240150859
2024-05-09

METHOD AND SYSTEM FOR PRODUCING DIRECT REDUCED METAL

#12
20240026475
2024-01-25

Hydrogen reduction of iron ore concentrate in loose layers and compacts

#13
20230407423
2023-12-21

BIOMASS DIRECT REDUCED IRON

#14
20230366051
2023-11-16

Biomass Direct Reduced Iron

#15
20230332258
2023-10-19

BIOMASS DIRECT REDUCED IRON

#16
20230250499
2023-08-10

METHOD AND DEVICE FOR DIRECT REDUCTION WITH DRY VENT GAS DE-DUSTING

#17
20230235418
2023-07-27

METHOD AND DEVICE FOR PRODUCING DIRECT REDUCED METAL

#18
20230203607
2023-06-29

Biomass Direct Reduced Iron

#19
20230203606
2023-06-29

Biomass Direct Reduced Iron

#20
20230160028
2023-05-25

Process for the Production of Carburized Sponge Iron

#21
20230082269
2023-03-16

METHOD FOR IRON MAKING BY CONTINUOUS SMELTING REDUCTION

#22
20230038218
2023-02-09

FACILITY AND METHOD FOR PRODUCTION OF DIRECT REDUCED IRON

#23
20230002853
2023-01-05

Production of Iron

#24
20230002852
2023-01-05

Production of iron

#25
20220396843
2022-12-15

METHOD AND CORRESPONDING APPARATUS FOR PRODUCING IRON FROM DIRECT REDUCTION OF IRON ORE

#26
20220119914
2022-04-21

Method and device for producing direct reduced metal

#27
20220098701
2022-03-31

Bio-reduction of metal ores integrated with biomass pyrolysis

#28
20220098686
2022-03-31

DIRECT REDUCTION SYSTEM AND RELATED PROCESS

#29
20220098685
2022-03-31

Bio-reduction of metal ores integrated with biomass pyrolysis

#30
20220064744
2022-03-03

Method and device for producing direct reduced metal

#31
20220010405
2022-01-13

Method and device for producing direct reduced metal

#32
20200332377
2020-10-22

Method and device for direct reduction with dry vent gas de-dusting

#33
20200318206
2020-10-08

Method for direct reduction using vent gas

#34
20200291494
2020-09-17

Reduced iron production method

#35
20200216921
2020-07-09

Reduction gas extraction from saturated top gas

#36
20190241990
2019-08-08

Production of iron

#37
20180221947
2018-08-09

Method and apparatus for producing metallic iron from iron oxide fines

#38
20180036804
2018-02-08

Method and apparatus for producing metallic iron from iron oxide fines

#39
20170292168
2017-10-12

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

#40
20170022578
2017-01-26

DEVICE AND METHOD FOR PRODUCING ELECTRIC ENERGY FOR PRODUCING IRON FROM OXIDE IRON ORES

#41
20160326606
2016-11-10

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

#42
20160312321
2016-10-27

Smelting process and apparatus

#43
20160304977
2016-10-20

Device for producing partially reduced iron

#44
20160208351
2016-07-21

Methods and systems for producing high carbon content metallic iron using coke oven gas

#45
20160076113
2016-03-17

METHOD AND DEVICE FOR REDUCING IRON-OXIDE-CONTAINING FEEDSTOCKS IN A HIGH-PRESSURE REDUCING UNIT

#46
20160024611
2016-01-28

Method for recycling iron-containing by-products discharged from coal-based molten ironmaking process, system therefor, and reduced iron agglomeration system

#47
20160002744
2016-01-07

Direct reduction process with improved product quality and process gas efficiency

#48
20150345870
2015-12-03

Molten iron manufacturing apparatus and molten iron manufacturing method

#49
20140150607
2014-06-05

Process for direct reduction of iron oxide

#50
20140033869
2014-02-06

Method for the commercial production of iron

#51
20140000834
2014-01-02

Method for Manufacturing an Austenitic Stainless Steel from a Nickel Laterite Ore and a Chromite Ore

#52
20130205951
2013-08-15

Method and system for the production of direct reduced iron using a synthesis gas with a high carbon monoxide content

#53
20130118306
2013-05-16

Process and plant for producing hot metal

#54
20130019716
2013-01-24

Process and apparatus for reducing charge materials containing iron ore or for producing pig iron or liquid primary steel products

#55
20120192677
2012-08-02

Method for making liquid iron and steel

#56
20120160060
2012-06-28

Use of bimodal carbon distribution in compacts for producing metallic iron nodules

#57
20120111149
2012-05-10

Apparatus for and method of production of iron, semi steel and reducing gases

#58
20100180723
2010-07-22

Method for manufacturing molten iron

#59
20090260483
2009-10-22

Method for the commercial production of iron

#60
20070209479
2007-09-13

Method and apparatus for reducing metal-oxygen compounds