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EP3486335A1 - Alimentation en gaz de réduction pour réduction directe - Google Patents

Alimentation en gaz de réduction pour réduction directe Download PDF

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Publication number
EP3486335A1
EP3486335A1 EP17201910.1A EP17201910A EP3486335A1 EP 3486335 A1 EP3486335 A1 EP 3486335A1 EP 17201910 A EP17201910 A EP 17201910A EP 3486335 A1 EP3486335 A1 EP 3486335A1
Authority
EP
European Patent Office
Prior art keywords
reducing gas
reduction
gas supply
supply unit
gas channel
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP17201910.1A
Other languages
German (de)
English (en)
Inventor
Franz Berner
Markus Leopoldseder
Reinhard Pum
Wolfgang Sterrer
Johann Wurm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP17201910.1A priority Critical patent/EP3486335A1/fr
Priority to PCT/EP2018/077527 priority patent/WO2019096495A1/fr
Priority to CN201821882235.8U priority patent/CN209555323U/zh
Priority to CN201811360223.3A priority patent/CN109777956A/zh
Publication of EP3486335A1 publication Critical patent/EP3486335A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases or liquids
    • F27D2007/023—Conduits

Definitions

  • the present invention relates to apparatus and methods for the reduction of metal oxide-containing particulate material by direct reduction using a reducing gas.
  • Bustle channels with Bustleslots in the refractory lining of a reduction shaft body are complex to produce. Compared to channels in the bulk, Bustle channels with Bustleslots also carry greater risk of clogging due to dust input with the reducing gas. In addition, they distribute the reducing gas less evenly over the cross section of the reduction well body, since they open at the periphery in the bed, while channels under the reducing gas channel bodies extend in the bed away from the circumference in the interior of the bed. About the type of supply of reducing gas to the reduction gas duct bodies in the absence of a Bustle channel gives the prior art no information.
  • the metal oxide-containing particulate material is preferably iron oxide-containing particulate material.
  • the reduction shaft body can be, for example, a direct reduction shaft, for example, a MIDREX® plant, or an HCI bin of a FINEX® plant, or a reduction pit of a COREX® plant.
  • the reduction shaft body has an outer steel shell, as well as in the bounded by the steel shell space - ie within the reduction shaft body - to the steel shell then a refractory lining.
  • the refractory lining of the interior is limited, which to Absorption of the metal oxide containing lumpy material is used.
  • Reduction gas is passed through a reducing gas supply line to the reduction shaft body.
  • a reducing gas supply line In order to guide all the reducing gas from the reducing gas supply line into the interior of the reduction shaft body receiving the lumpy material, at least one reducing gas channel body is present.
  • the reduction gas channel body is suitable for forming a free space in the bed of lumpy Good.
  • the reducing gas flows through the space in the bed.
  • the reduction gas channel body protrudes with a portion of its longitudinal extension, that is, partially in a reduction gas supply unit. Of course, it also protrudes into the interior of the reduction shaft body receiving the lumpy material; out of this interior it also protrudes into the reducing gas supply unit.
  • the reducing gas supply unit is adapted to lead the reducing gas into a space below the reducing gas channel body; preferably vertically below the reducing gas channel body, so that during operation reducing gas flows into a space formed vertically below the reduction gas channel body in the bed.
  • a reducing gas channel body is preferably an elongated tube.
  • execution of a reduction gas channel body is on the WO2013156548 referenced, the disclosure of which is included in the present application.
  • the enumerated three variants are compared to an orifice in the extension of the longitudinal axis of the reduction gas channel body seen from the longitudinal axis of the reduction shaft body from - so frontally - radially considered space-saving.
  • the feed of reducing gas can be optimally selected in accordance with the space available around a special reduction shaft body. This is particularly favorable when converting existing reduction shaft body to the solution presented in this application, since there the space available can be greatly limited by already existing other aggregates and device parts in different directions.
  • the Reduktionsgaszuchtü is within the reduction shaft body, but away from the interior for receiving the metal oxide-containing lumpy material. It is thus within the space enclosed by the outer steel shell, but not in the interior for receiving the metal oxide-containing lumpy material. Offside is to be understood as spatially separated. This is the case, for example, if a partial section of an internal bustle channel present in an already existing reduction shaft body in the refractory lining is used with Bustleslots as reduction gas supply unit.
  • Bustle canal with Bustleslots is walled in such a case against the reducing gas supply unit and no longer used for reducing gas supply.
  • the reducing gas supply unit lies outside the reduction shaft body. So it is from the inside out beyond the outer steel shell of, preferably substantially cylindrical, reduction shaft body. This is the case, for example, when the reduction shaft body is rebuilt.
  • the inner refractory lining is easy to accomplish in this case, since no complicated geometries for a reducing gas supply unit have to be applied in the refractory lining.
  • At least one partial region of the feed line which encompasses the mouth, preferably the entire feed line, has a gradient with the lowest point at the mouth-side end of the feed line. This reduces the buildup of dust in the feed line and consequent danger of clogging.
  • the slope has an angle to the horizontal of at least 5 °, more preferably at least 15 °, most preferably at least 30 °.
  • the direct reduction takes place in a reduction shaft body with interior space for receiving the metal oxide-containing lumpy material.
  • the reducing gas flows via the feed line of the reducing gas supply unit supplied within the reduction shaft body, but away from the interior for receiving the metal oxide-containing particulate material in the Reduktionsgaszuschreibaji.
  • the reducing gas which is supplied via the feed line of the reducing gas supply unit, thus discharges within the outer steel shell of the reduction shaft body, but not in the interior for receiving the metal oxide-containing particulate material.
  • Offside is to be understood as spatially separated. This is the case, for example, if a partial section of an internal bustle channel present in an already existing reduction shaft body in the refractory lining is used with Bustleslots as reduction gas supply unit.
  • the remaining Bustle canal with Bustleslots is walled in such a case against the reducing gas supply unit and no longer used for reducing gas supply.
  • the reducing gas flows via the feed line of the reducing gas supply unit outside the reduction shaft body into the reducing gas supply unit.
  • the reducing gas which is supplied via the feed line of the reducing gas supply unit, thus discharges from the inner space for receiving the metal oxide-containing lumpy material as seen beyond the outer steel shell of the reduction shaft body.
  • the reducing gas when entering the reducing gas supply unit, has a flow direction inclined downward in the direction of the reducing gas supply unit.
  • the flow direction has an angle to the horizontal of at least 5 °, more preferably at least 15 °, most preferably at least 30 °.
  • the flow direction is given by the inclination of the opening into the reducing gas supply unit portion of the feed line.
  • FIG. 1 shows schematically and by way of example an embodiment of a device according to the invention for the reduction of metal oxide-containing lumpy Good by direct reduction using a reducing gas, in which Reduktionsgaszuschreibajien 1 outside the reduction shaft body 2 - is shown for clarity, only the portion of the reduction shaft body 2, in which Reduktionsgaszuschreibajien 1 are , They lie from the not visible behind the plane of the paper interior for receiving the metal oxide lumpy good from beyond the outer steel shell 3 of the substantially cylindrical reduction shaft body.
  • the reducing gas supply pipe 4 for supplying the reducing gas to the reduction shaft body 2 forms a ring pipe around the reduction shaft body 2.
  • the reducing gas supply units 1 are suitable for conducting reducing gas into a space below the reducing gas channel body 6, which is shown in FIG. 2 making a cut through a section of the FIG. 1 represents, is visible. Also visible in FIG. 2 in that the mouth 7 of the feed line 5a is arranged partially in horizontal viewing next to the reducing gas channel 6, and partly below the reducing gas channel 6. Likewise is from the FIGS. 1 and 2 it can be seen that the feed lines 5a, 5b have a gradient in the direction of the mouth 7 into the reducing gas supply unit 1.
  • FIG. 3 and FIG. 4 show analogously to FIG. 1 and FIG. 2 how the Reduktionsgaszuzentechnik is located within the reduction well body 8 and its outer steel shell 9, but away from the interior 10 for receiving metal oxide-containing particulate material. It lies in the refractory lining 11; it is formed by a bricked area of a bustle channel 12 with bust slots 12 present in the refractory lining 11 of an existing reduction shaft body 8.
  • the feed line 13 opens above the reducing gas channel body 14.
  • An Abmautation 17 Bustlekanal is unlike the refractory lining 11 shown hatched.
  • FIG. 5 shows a variant of in Figures 3 and 4 illustrated embodiment with reducing gas supply unit within the reduction well body 15, namely a bricked part of an internal Bustlekanals in the refractory lining, which is visible as a protruding bulge.
  • reducing gas supply unit within the reduction well body 15, namely a bricked part of an internal Bustlekanals in the refractory lining, which is visible as a protruding bulge.
  • two feed lines 16a, 16b open on horizontal viewing adjacent to the respective reduction gas channel body 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
EP17201910.1A 2017-11-15 2017-11-15 Alimentation en gaz de réduction pour réduction directe Withdrawn EP3486335A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17201910.1A EP3486335A1 (fr) 2017-11-15 2017-11-15 Alimentation en gaz de réduction pour réduction directe
PCT/EP2018/077527 WO2019096495A1 (fr) 2017-11-15 2018-10-10 Alimentation en gaz réducteur pour réduction directe
CN201821882235.8U CN209555323U (zh) 2017-11-15 2018-11-15 用于还原含有金属氧化物的块状物件的装置
CN201811360223.3A CN109777956A (zh) 2017-11-15 2018-11-15 用于直接还原的还原气体输送

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17201910.1A EP3486335A1 (fr) 2017-11-15 2017-11-15 Alimentation en gaz de réduction pour réduction directe

Publications (1)

Publication Number Publication Date
EP3486335A1 true EP3486335A1 (fr) 2019-05-22

Family

ID=60327225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17201910.1A Withdrawn EP3486335A1 (fr) 2017-11-15 2017-11-15 Alimentation en gaz de réduction pour réduction directe

Country Status (3)

Country Link
EP (1) EP3486335A1 (fr)
CN (2) CN109777956A (fr)
WO (1) WO2019096495A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU102095B1 (en) * 2020-09-28 2022-03-29 Wurth Paul Sa Compact Gas Injection System for a Furnace
LU102096B1 (en) * 2020-09-28 2022-03-29 Wurth Paul Sa Exchangeable cooled nose with ceramic injector passage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE546071C2 (en) * 2021-11-30 2024-05-07 Hybrit Development Ab A system for direct reduction of iron ore to sponge iron

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR343548A (fr) * 1904-05-30 1904-10-08 Georgs Marien Bergwerks Und Hu Procédé et installation de fourneaux pour la production de la fonte par réduction et fusion des minerais dans des fourneaux séparés
FR500758A (fr) * 1918-03-22 1920-03-24 Arthur Auguste Frankignoul Haut-fourneau réducto-électrique pour la fabrication directe du fer
US4374585A (en) * 1978-03-11 1983-02-22 Hamburger Stahlwerke Gmbh Apparatus for the direct reduction of iron ores
JPH09118907A (ja) * 1995-10-23 1997-05-06 Taiyo Chuki Co Ltd 竪型迅速溶解炉
WO1997047773A1 (fr) 1996-06-12 1997-12-18 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Dispositif de production d'eponge de fer
WO2009000409A1 (fr) 2007-06-28 2008-12-31 Siemens Vai Metals Technologies Gmbh & Co Procédé et dispositif de formation d'éponges de fonte
WO2013156548A1 (fr) 2012-04-18 2013-10-24 Siemens Vai Metals Technologies Gmbh Dispositif et procédé de gazéification de surface dans un puits de réacteur de réduction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR343548A (fr) * 1904-05-30 1904-10-08 Georgs Marien Bergwerks Und Hu Procédé et installation de fourneaux pour la production de la fonte par réduction et fusion des minerais dans des fourneaux séparés
FR500758A (fr) * 1918-03-22 1920-03-24 Arthur Auguste Frankignoul Haut-fourneau réducto-électrique pour la fabrication directe du fer
US4374585A (en) * 1978-03-11 1983-02-22 Hamburger Stahlwerke Gmbh Apparatus for the direct reduction of iron ores
JPH09118907A (ja) * 1995-10-23 1997-05-06 Taiyo Chuki Co Ltd 竪型迅速溶解炉
WO1997047773A1 (fr) 1996-06-12 1997-12-18 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Dispositif de production d'eponge de fer
WO2009000409A1 (fr) 2007-06-28 2008-12-31 Siemens Vai Metals Technologies Gmbh & Co Procédé et dispositif de formation d'éponges de fonte
WO2013156548A1 (fr) 2012-04-18 2013-10-24 Siemens Vai Metals Technologies Gmbh Dispositif et procédé de gazéification de surface dans un puits de réacteur de réduction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU102095B1 (en) * 2020-09-28 2022-03-29 Wurth Paul Sa Compact Gas Injection System for a Furnace
LU102096B1 (en) * 2020-09-28 2022-03-29 Wurth Paul Sa Exchangeable cooled nose with ceramic injector passage
WO2022063805A1 (fr) * 2020-09-28 2022-03-31 Paul Wurth S.A. Buse refroidie échangeable avec passage d'injecteur en céramique

Also Published As

Publication number Publication date
CN109777956A (zh) 2019-05-21
CN209555323U (zh) 2019-10-29
WO2019096495A1 (fr) 2019-05-23

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