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SE546870C2 - A method for the production of carburized sponge iron - Google Patents

A method for the production of carburized sponge iron

Info

Publication number
SE546870C2
SE546870C2 SE2350304A SE2350304A SE546870C2 SE 546870 C2 SE546870 C2 SE 546870C2 SE 2350304 A SE2350304 A SE 2350304A SE 2350304 A SE2350304 A SE 2350304A SE 546870 C2 SE546870 C2 SE 546870C2
Authority
SE
Sweden
Prior art keywords
shaft
carburising
gas
direct reduction
carburisation
Prior art date
Application number
SE2350304A
Other versions
SE2350304A1 (en
Inventor
Gunilla Hyllander
Johan Riesbeck
Original Assignee
Hybrit Development Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hybrit Development Ab filed Critical Hybrit Development Ab
Priority to SE2350304A priority Critical patent/SE546870C2/en
Priority to CN202480018276.4A priority patent/CN120787265A/en
Priority to KR1020257033839A priority patent/KR20250161005A/en
Priority to AU2024240537A priority patent/AU2024240537A1/en
Priority to PCT/SE2024/050212 priority patent/WO2024196294A1/en
Publication of SE2350304A1 publication Critical patent/SE2350304A1/en
Publication of SE546870C2 publication Critical patent/SE546870C2/en
Priority to MX2025010814A priority patent/MX2025010814A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/26—Increasing the gas reduction potential of recycled exhaust gases by adding additional fuel in recirculation pipes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
    • C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/64—Controlling the physical properties of the gas, e.g. pressure or temperature
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/66—Heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Manufacture Of Iron (AREA)

Abstract

An arrangement for the production of sponge iron by direct reduction of iron ore, said arrangement comprising a direct reduction shaft (1), a reduction gas inlet (5), provided at a first level (L1) in the direct reduction shaft (1), a carburisation shaft (7), a material feed conduit (8) extending from the bottom outlet (3) of the direct reduction shaft (1) to the carburisation shaft (7), which has a carburising gas inlet (9) and a carburising gas source (11) connected to said gas inlet (9), and a valve (12) for controlling a flow of carburising gas from the carburising gas source (11) into the carburisation shaft (7) through the carburising gas inlet (9). A gas sensor (13) is provided to measure a content of the carburising gas in the direct reduction shaft (1). A control unit (14) is configured to control the flow rate of the carburising gas introduced into the carburisation shaft (7) on basis of the determined content of carburising gas at said second level (L2) by controlling said valve (12), such that the content of carburising gas at said second level (L2) is within a predetermined range.
SE2350304A 2023-03-17 2023-03-17 A method for the production of carburized sponge iron SE546870C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE2350304A SE546870C2 (en) 2023-03-17 2023-03-17 A method for the production of carburized sponge iron
CN202480018276.4A CN120787265A (en) 2023-03-17 2024-03-07 Method for producing carburized sponge iron
KR1020257033839A KR20250161005A (en) 2023-03-17 2024-03-07 Method for producing carbonized sponge iron
AU2024240537A AU2024240537A1 (en) 2023-03-17 2024-03-07 A method for the production of carburized sponge iron
PCT/SE2024/050212 WO2024196294A1 (en) 2023-03-17 2024-03-07 A method for the production of carburized sponge iron
MX2025010814A MX2025010814A (en) 2023-03-17 2025-09-12 A method for the production of carburized sponge iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2350304A SE546870C2 (en) 2023-03-17 2023-03-17 A method for the production of carburized sponge iron

Publications (2)

Publication Number Publication Date
SE2350304A1 SE2350304A1 (en) 2024-09-18
SE546870C2 true SE546870C2 (en) 2025-03-04

Family

ID=90364282

Family Applications (1)

Application Number Title Priority Date Filing Date
SE2350304A SE546870C2 (en) 2023-03-17 2023-03-17 A method for the production of carburized sponge iron

Country Status (6)

Country Link
KR (1) KR20250161005A (en)
CN (1) CN120787265A (en)
AU (1) AU2024240537A1 (en)
MX (1) MX2025010814A (en)
SE (1) SE546870C2 (en)
WO (1) WO2024196294A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016209298A1 (en) * 2015-06-24 2016-12-29 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
CN107858471A (en) * 2017-12-01 2018-03-30 江苏省冶金设计院有限公司 A kind of system and method for gas-based shaft kiln production sponge iron
US20210246521A1 (en) * 2018-06-12 2021-08-12 Primetals Technologies Austria GmbH Method for Carburization of HDRI produced in H2 based Direct Reduction Process
SE2150742A1 (en) * 2021-06-11 2022-12-12 Hybrit Development Ab Process for the production of carburized sponge iron

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE532975C2 (en) * 2008-10-06 2010-06-01 Luossavaara Kiirunavaara Ab Process for the production of direct-reduced iron
SE546651C2 (en) * 2020-05-04 2025-01-07 Hybrit Development Ab Process for the production of carburized sponge iron

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016209298A1 (en) * 2015-06-24 2016-12-29 Midrex Technologies, Inc. Methods and systems for increasing the carbon content of sponge iron in a reduction furnace
CN107858471A (en) * 2017-12-01 2018-03-30 江苏省冶金设计院有限公司 A kind of system and method for gas-based shaft kiln production sponge iron
US20210246521A1 (en) * 2018-06-12 2021-08-12 Primetals Technologies Austria GmbH Method for Carburization of HDRI produced in H2 based Direct Reduction Process
SE2150742A1 (en) * 2021-06-11 2022-12-12 Hybrit Development Ab Process for the production of carburized sponge iron

Also Published As

Publication number Publication date
CN120787265A (en) 2025-10-14
KR20250161005A (en) 2025-11-14
SE2350304A1 (en) 2024-09-18
AU2024240537A1 (en) 2025-09-18
MX2025010814A (en) 2025-10-01
WO2024196294A1 (en) 2024-09-26

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