ClassID:

118783

C21B13/146 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes; Multi-stage processes processes carried out in different vessels or furnaces Multi-step reduction without melting

Recent Application in this class:
#1
20250305075
2025-10-02

EXTRACTION OF ELEMENTS AND/OR COMPOUNDS FROM IRON-CONTAINING MATERIALS SUCH AS IRON-CONTAINING TAILINGS, RECOVERY OF MAGNETICALLY SUSCEPTIBLE MATERIALS, AND RELATED SYSTEMS AND PRODUCTS

#2
20240392399
2024-11-28

INDUCTION HEATING OF DRI

#3
20230407423
2023-12-21

BIOMASS DIRECT REDUCED IRON

#4
20230160028
2023-05-25

Process for the Production of Carburized Sponge Iron

#5
20220002826
2022-01-06

Device for manufacturing molten iron

#6
20180361395
2018-12-20

Multi-stage suspension magnetizing roasting-magnetic separation system device and method for refractory iron ore

#7
20170058373
2017-03-02

Methods and systems for increasing the carbon content of sponge iron in a reduction furnace

#8
20160348198
2016-12-01

System and method for fluidized direct reduction of iron ore concentrate powder

#9
20160348197
2016-12-01

System and method for fluidized bed reduction of powdered iron ore

#10
20160168654
2016-06-16

METHOD FOR MANUFACTURING AGGLOMERATE AND REDUCED IRON

#11
20160160304
2016-06-09

Use of top gas in direct reduction processes

#12
20160017447
2016-01-21

Methods and systems for producing direct reduced iron utilizing a petroleum refinery bottoms or petroleum coke gasifier and a hot gas cleaner

#13
20150345870
2015-12-03

Molten iron manufacturing apparatus and molten iron manufacturing method

#14
20140150606
2014-06-05

Method of manufacturing direct reduction iron and reduction firing apparatus

#15
20120263619
2012-10-18

Method for preparing a metallic article having an other additive constituent, without any melting

#16
20120055286
2012-03-08

Method of manufacturing direct reduction iron and reduction firing apparatus

#17
20100269636
2010-10-28

Direct reduction apparatus and process

#18
20090308204
2009-12-17

METHOD AND APPARATUS FOR REDUCING METALLIFEROUS MATERIAL TO A REDUCTION PRODUCT

#19
20090095132
2009-04-16

PROCESSING OF METAL CHLORIDE SOLUTIONS AND METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON

#20
20080292488
2008-11-27

Method for preparing a metallic article having an other additive constituent, without any melting

#21
20080210055
2008-09-04

Direct reduction apparatus and process

#22
20070209479
2007-09-13

Method and apparatus for reducing metal-oxygen compounds