ClassID:

118757

C21B13/0013 - 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

Sub-classes:
Recent Application in this class:
#1
20260117331
2026-04-30

MANAGEMENT OF OFFGAS DUCT ACCRETIONS IN A SMELTING PROCESS

#2
20250075280
2025-03-06

COLD IRON SOURCE MELTING RATIO ESTIMATION DEVICE, CONVERTER-TYPE REFINING FURNACE CONTROL DEVICE, COLD IRON SOURCE MELTING RATIO ESTIMATION METHOD, AND MOLTEN IRON REFINING TREATMENT METHOD

#3
20240279757
2024-08-22

DIRECT BATH SMELTING PROCESS WITH FAST QUENCH OF MOLTEN MATERIAL IN HOT OFFGAS

#4
20240191316
2024-06-13

Pyrometallurgical Method for Recycling Shredded Material of Waste from the Production of New and Defective or End-of-Life Batteries for Electric Vehicles or Portable Li-Ion Batteries

#5
20240052440
2024-02-15

METHOD OF STEEL SMELTING DIRECTLY FROM IRON ORE

#6
20230407422
2023-12-21

DIRECT BATH SMELTING PROCESS WITH MANAGEMENT OF PERIPHERAL COLD ZONES AT THE METAL-SLAG INTERFACE

#7
20230082269
2023-03-16

METHOD FOR IRON MAKING BY CONTINUOUS SMELTING REDUCTION

#8
20220316017
2022-10-06

METHOD OF INTRODUCING A METALLIFEROUS FEED IN AN IRONMAKING PROCESS

#9
20220275466
2022-09-01

Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas

#10
20220042743
2022-02-10

Lance unblocking method and apparatus

#11
20210062279
2021-03-04

Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas

#12
20180371560
2018-12-27

Method and system for producing high-carbon DRI using syngas

#13
20180363075
2018-12-20

METHOD FOR PRODUCING LIQUID PIG IRON

#14
20180038650
2018-02-08

Lance unblocking method and apparatus

#15
20170081745
2017-03-23

Direct smelting process

#16
20160312320
2016-10-27

Method to operate a smelt cyclone

#17
20160017458
2016-01-21

Direct smelting process and apparatus

#18
20150259758
2015-09-17

Starting a smelting process

#19
20150135899
2015-05-21

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

#20
20140345425
2014-11-27

Starting a smelting process

#21
20140318320
2014-10-30

Starting a smelting process

#22
20130333523
2013-12-19

Direct smelting process

#23
20130180361
2013-07-18

Direct smelting process

#24
20130116105
2013-05-09

Direct smelting process

#25
20120067171
2012-03-22

Direct smelting process and apparatus

#26
20120013053
2012-01-19

Apparatus for direct smelting of zinc bearing compounds to produce metallic zinc

#27
20110290075
2011-12-01

Nozzle for injecting gas containing oxygen into a pig iron device having an injector insertion pipe

#28
20110185856
2011-08-04

Ironmaking and steelmaking

#29
20110017021
2011-01-27

Lance for injecting solid material into a vessel

#30
20100126312
2010-05-27

Direct smelting of zinc bearing compounds to produce metallic zinc

#31
20100126311
2010-05-27

DIRECT PROCESSING OF METALLIC ORE CONCENTRATES INTO FERROALLOYS

#32
20100126310
2010-05-27

Direct processing of ferrotitania ores and sands

#33
20100011908
2010-01-21

PRESSURE CONTROL IN DIRECT SMELTING PROCESS

#34
20090320647
2009-12-31

Pressure control in direct smelting process

#35
20090309275
2009-12-17

Direct smelting plant

#36
20090308205
2009-12-17

DIRECT SMELTING PLANT WITH WASTE HEAT RECOVERY UNIT

#37
20090218737
2009-09-03

Direct smelting plant

#38
20090194919
2009-08-06

Direct smelting plant

#39
20090166937
2009-07-02

Direct smelting plant

#40
20090014928
2009-01-15

Gas injection lance

#41
20070283785
2007-12-13

Process for recovery of iron from copper slag

#42
20070272058
2007-11-29

Direct smelting plant and process

#43
20070256518
2007-11-08

Ironmaking and steelmaking

#44
20070194505
2007-08-23

Direct smelting plant and process

#45
20060157899
2006-07-20

Single vessel blast furnace and steel making/gasifying apparatus and process

#46
20060119023
2006-06-08

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

#47
20060119022
2006-06-08

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

#48
20060119020
2006-06-08

Supplying solid feed materials for a direct smelting process

#49
20060108723
2006-05-25

Apparatus for injecting gas into a vessel

#50
20060108722
2006-05-25

Apparatus for injecting gas into a vessel

#51
20060037436
2006-02-23

Smelting process for the production of iron

#52
20060011013
2006-01-19

Process and device for direct production of steel from iron-containing materials