ClassID:

118771

C21B13/023 - CPC Classification

Classification description:

Making spongy iron or liquid steel, by direct processes in shaft furnaces wherein iron or steel is obtained in a molten state

Sub-classes:
Recent Application in this class:
#1
20250137080
2025-05-01

METHOD FOR MANUFACTURING CARBONACEOUS MATERIAL-CONTAINING AGGLOMERATE ORE, AND METHOD FOR MANUFACTURING MOLTEN PIG IRON

#2
20240344155
2024-10-17

METHOD FOR PRODUCING AN IRON MELT

#3
20230175088
2023-06-08

INTEGRATED SYSTEMS EMPLOYING CARBON OXIDE ELECTROLYSIS IN STEEL PRODUCTION

#4
20210301359
2021-09-30

Integration of DR plant and electric DRI melting furnace for producing high performance iron

#5
20200140966
2020-05-07

Classified reduction gasification iron smelting process of iron ore powder and coal powder in a Y-type entrained flow bed

#6
20150176095
2015-06-25

Shaft furnace and method of operating same

#7
20150135899
2015-05-21

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

#8
20150007697
2015-01-08

Method and device for reducing iron-oxide-containing feedstocks in a high-pressure reducing unit

#9
20140318319
2014-10-30

Starting a smelting process

#10
20130098204
2013-04-25

Method for producing granular metallic iron

#11
20110179910
2011-07-28

Process for producing agglomerates of finely particulate iron carriers

#12
20110154949
2011-06-30

Method for operating a furnace and device for carrying out the method

#13
20110126672
2011-06-02

Method and device for the continuous production of steel using metal charge material

#14
20100270715
2010-10-28

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

#15
20100031777
2010-02-11

Ore treating method, ore treating apparatus, iron manufacturing method, and iron and steel manufacturing method

#16
20060162499
2006-07-27

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

#17
20050155457
2005-07-21

Method and device for the continuous production of steel using metal charge material