EP2848705B1 - Struktur für düsenabschnitt in hochofen - Google Patents

Struktur für düsenabschnitt in hochofen Download PDF

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Publication number
EP2848705B1
EP2848705B1 EP13788617.2A EP13788617A EP2848705B1 EP 2848705 B1 EP2848705 B1 EP 2848705B1 EP 13788617 A EP13788617 A EP 13788617A EP 2848705 B1 EP2848705 B1 EP 2848705B1
Authority
EP
European Patent Office
Prior art keywords
tuyere
blowpipe
furnace
cooler
stave
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.)
Active
Application number
EP13788617.2A
Other languages
English (en)
French (fr)
Other versions
EP2848705A1 (de
EP2848705A4 (de
Inventor
Toshiya Kitagawa
Shoji FURUTACHI
Hironobu Ishikawa
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.)
Nippon Steel Engineering Co Ltd
Nippon Steel Plant Designing Corp
Original Assignee
NS Plant Designing Corp
Nippon Steel and Sumikin Engineering Co Ltd
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 NS Plant Designing Corp, Nippon Steel and Sumikin Engineering Co Ltd filed Critical NS Plant Designing Corp
Publication of EP2848705A1 publication Critical patent/EP2848705A1/de
Publication of EP2848705A4 publication Critical patent/EP2848705A4/de
Application granted granted Critical
Publication of EP2848705B1 publication Critical patent/EP2848705B1/de
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/163—Blowpipe assembly
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C21B7/106—Cooling of the furnace bottom
    • 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 peculiar to furnaces of these types
    • F27B1/12—Shells or casings; Supports therefor
    • F27B1/14—Arrangements of linings
    • 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 peculiar to furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • 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 peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F27D1/045—Bricks for lining cylindrical bodies, e.g. skids, tubes
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces

Definitions

  • the present invention relates to a structure of a tuyere section of a blast furnace.
  • the invention is usable as a tuyere section of a blast furnace including stave coolers around the tuyere section.
  • a lot of tuyeres are typically provided at a predetermined height of a furnace body in a blast furnace.
  • the tuyeres are respectively connected with blowpipes extending from a bustle pipe disposed around the furnace body. Hot blast is supplied from the blowpipes to the tuyeres and blown through the tuyeres into the furnace (see JP-A-2002-220609 ).
  • a tuyere 8 configured to deliver high-temperature air into the furnace is held by a tuyere cooler 9.
  • the tuyere cooler 9 is further held by a tuyere holder 10.
  • the tuyere holder 10 is fixed to a furnace shell 11 on a periphery of the blast furnace.
  • Tuyere bricks 5 are disposed surrounding the tuyere cooler 9.
  • the tuyere bricks 5 are formed by combining a plurality of bricks in a manner to surround the tuyere cooler 9.
  • Hearth bricks are laid on a bottom of a hearth of the blast furnace.
  • a hearth wall on the upper side of the hearth is lined with hearth wall bricks 7.
  • the tuyere bricks 5 are installed on the upper side of the hearth wall bricks 7.
  • bosh bricks 6 are installed on the upper side of the tuyere bricks 5.
  • a stave cooler 1 is disposed between the bosh bricks 6 and the furnace shell 11 and between the hearth wall bricks 7 and the furnace shell 11.
  • a stave cooler 1a for the tuyere is disposed between the tuyere bricks 5 and the furnace shell 11.
  • stave coolers 1 and 1a a plurality of cooling water pipes are provided. Cooling water is supplied via such cooling water pipeline 15. The stave coolers 1 and 1a are cooled by the cooling water flowing in the cooling water pipes, whereby heat from an inside of the furnace is blocked to protect the furnace shell 11.
  • the tuyere 8 and the tuyere cooler 9 surrounded by the tuyere bricks 5 are fixed to the furnace shell 11 through the tuyere holder 10. Since the furnace shell 11 is kept at a low temperature by being cooled by the stave coolers, thermal expansion of the furnace shell 11 is small, so that a position of the tuyere 8 is almost constant.
  • the hearth bricks and the hearth wall bricks 7 are heated to a high temperature for storing molten pig iron and slag in the furnace, resulting in thermal expansion. By this thermal expansion, the tuyere bricks 5 installed on the upper side of the hearth wall bricks 7 are pushed upward. In such a structure, the tuyere 8 and the tuyere cooler 9 receive load of upward deformation through the tuyere bricks 5.
  • a compressible mortar layer 12 is provided between a lower portion of the tuyere cooler 9 and the tuyere bricks 5.
  • the compressible mortar layer 12 is compressed to prevent the pushed tuyere bricks 5 from applying an excessive load onto the tuyere cooler 9.
  • a blowpipe 17 is inserted from an outside of the furnace shell 11 into the tuyere holder 10, the tuyere cooler 9 and the tuyere 8.
  • the blowpipe 17 is connected to the bustle pipe disposed around the furnace body via the tuyere stock 18. Hot blast is supplied from the bustle pipe through the tuyere stock 18 and the blowpipe 17 to be blown into the furnace body through the tuyere.
  • the blowpipe 17 and the tuyere stock 18 are supported by a furnace tower structure (not shown) provided around the furnace body in conjunction with the bustle pipe.
  • An end of the blowpipe 17 is formed in a convex spherical surface while an inner connection portion of the tuyere 8 to the blowpipe is formed in a concave spherical surface, thereby defining a spherical joint.
  • Connection between the tuyere 8 and the blowpipe 17 by the spherical joint allows mutual displacement of the tuyere 8 and the blowpipe 17 while keeping airtightness therebetween.
  • the tuyere 8 is held by the furnace body, namely, the furnace shell 11 through the tuyere cooler 9 and the tuyere holder 10, since it is necessary to maintain a position of the end of the tuyere 8 (i.e., blowing position of hot blast) at a predetermined position inside the furnace body for a proper operation of the blast furnace.
  • blowpipe 17 and the bustle pipe are supported independently of the furnace body including the tuyere 8
  • the blowpipe 17 and the tuyere 8 are connected by the spherical surface joint. This is because the furnace body is heated to a high temperature to be thermally deformed while the blowpipe 17 through the bustle pipe are supported by the furnace tower structure to be less thermally deformed, resulting in different thermal deformation behavior.
  • the bricks 5, 6 and 7 for protection are piled up on an inner side of the stave coolers 1 and 1a in order to block heat shock at the initial blowing-in and prevent damage from molten pig iron and slag in the furnace. Since the tuyere section is provided penetrating a thickness of the tuyere brick 5 and the stave cooler 1a, a distance from the furnace shell 11 to the tuyere 8 is increased, and the blowpipe 17 is accordingly lengthened.
  • JP-A-2002-220609 , GB1288531 and US3901539 each disclose tuyere structures for blast furnaces.
  • the end of the blowpipe 17 is inserted from the outside of the furnace shell 11 into the tuyere 8, leading to the connection by the spherical surface joint.
  • mutual displacement of the blowpipe 17 and the tuyere 8 is allowable while keeping airtightness.
  • the spherical surface joint requires a highly accurate processing for forming a spherical surface capable of ensuring airtightness since the airtightness is kept by metal touch connection of the spherical surfaces around an air hole, resulting in an increase in production cost. Moreover, even with such metal touch connection, gas leaks when high pressure is applied.
  • the blowpipe 17 is supported in a state of a cantilever. Accordingly, the position of the end of the blowpipe 17 is easily displaced, which may cause difficulty in suitably keeping airtightness of the tuyere 8 to the spherical surface joint.
  • the tuyere 8 is disposed on an inner surface of the furnace while being supported by the tuyere cooler 9.
  • the tuyere cooler 9 or the tuyere holder 10 is machined for adjustment so that all of the circumferentially arranged tuyeres 8 evenly face the center of the furnace.
  • the tuyere 8 and the tuyere cooler 9 supporting the tuyere 8 are surrounded by the bricks 5 for protection and spaced away from the stave coolers 1 and 1a.
  • This arrangement may cause thermal deformation of the tuyere cooler 9. Accordingly, the position of the tuyere 8 on the inner surface of the furnace or a posture of the tuyere 8 may be shifted by the thermal deformation.
  • An object of the invention is to provide a structure of a tuyere section in a blast furnace, the tuyere section capable of preventing gas leakage and keeping a position of an end of a tuyere at a predetermined position in a furnace body while absorbing a difference in thermal deformation between the furnace body and a bustle pipe.
  • a tuyere structure of a blast furnace comprising: a blowpipe comprising: a first flange formed on a periphery of the blowpipe and fixed to a furnace shell; and a second flange formed at an end of the blowpipe; a tuyere fixed to the second flange formed at the end of the blowpipe, the tuyere being inserted in a tuyere opening formed on the furnace shell, the tuyere opening being closed by the first flange; a flexible joint connecting the blowpipe to a tuyere stock; and a stave cooler provided inside the furnace shell around the tuyere and forming an inner surface of the blast furnace.
  • the blowpipe is fixed to the furnace shell, the position of the tuyere fixed to the end of the blowpipe relative to the furnace shell, in other words, the position of the end of the tuyere in the furnace body can be kept at a predetermined position.
  • the flexible joint since the flexible joint is interposed between the blowpipe and the tuyere stock, the flexible joint can absorb a difference in thermal deformation between the furnace body and the bustle pipe.
  • the blowpipe When the distance between the tuyere and the furnace shell to which the blowpipe is fixed is large, the blowpipe may be cantilevered to displace the position of the end of the tuyere.
  • the stave cooler directly serves as an inner surface of the furnace, the length of the blowpipe can minimized and displacement of the position of the tuyere can be inhibited.
  • an opening for the tuyere is formed on the furnace shell around the tuyere and is connected with an entire periphery of a flange formed on a periphery of the blowpipe.
  • a tuyere structure (structure of tuyere section) 20 in the exemplary embodiment includes: a blowpipe 31 fixed to a furnace shell 21; a tuyere 32 fixed to an end of the blowpipe 31; and a flexible joint 34 that connects the blowpipe 31 to a tuyere stock 33.
  • a flexible joint in a form of metal bellows is used as the flexible joint 34.
  • a flange to which the tuyere is attached is formed at an end of the blowpipe 31.
  • the tuyere 32 is fixed to the flange by bolts and the like.
  • the blowpipe 31 has a flange at an opposite end from the tuyere 32.
  • the flexible joint 34 is connected to this flange.
  • the flexible joint 34 has a flange at an opposite end from the blowpipe 31.
  • the tuyere stock 33 is connected to this flange.
  • An opposite end of the tuyere stock 33 from the flexible joint 34 is connected to a bustle pipe (not shown).
  • the blowpipe 31 and the tuyere 32 are supported by the furnace shell 21.
  • the tuyere stock 33 and the flexible joint 34 are supported by the bustle pipe (not shown).
  • the hot blast can be delivered through the tuyere stock 33, the flexible joint 34 and the blowpipe 31 to the tuyere 32 and can be blown out through the tuyere 32.
  • a direction and a position of the tuyere 32 relative to the blowpipe 31 are adjusted in advance so that the direction and the position of the tuyere 32 is set at an appropriate value when the tuyere 32 is disposed in the furnace.
  • An tuyere opening 211 (an opening for the tuyere) is formed on the furnace shell 21.
  • a flange 311 is formed on a periphery of the blowpipe 31.
  • the end (near the tuyere 32) of the blowpipe 31 is inserted from the tuyere opening 211 to an inside of the furnace (left side in the figure), so that the flange 311 closes the tuyere opening 211.
  • the flange 311 is fixed to a periphery of the tuyere opening 211 by bolts at a predetermined interval, resulting in airtight connection.
  • the blowpipe 31 is fixed to the furnace shell 21.
  • a hearth stave-cooler 22 Inside the furnace shell 21, a hearth stave-cooler 22, a tuyere stave-cooler 23 and a bosh stave-cooler 24 are provided.
  • the tuyere stave-cooler 23 has a cutout 231 through which the tuyere is inserted.
  • the blowpipe 31 and the tuyere 32 inserted inside the furnace shell 21 through the tuyere opening 211 pass through the cutout 231 to be disposed in a manner to be surrounded by the tuyere stave-cooler 23.
  • hearth stave-cooler 22 Inside of the hearth stave-cooler 22 is lined with hearth wall bricks 25.
  • Refractory blocks e.g., tuyere bricks 5 in Fig. 3
  • Refractory blocks 232 and 242 are respectively fit into furnace-interior surfaces (inner surface of the furnace) of the tuyere stave-cooler 23 and the bosh stave-cooler 24.
  • a thickness T1 from the furnace shell 21 to the furnace-interior surface is smaller than a thickness T2 (shown in a chain line in the figure) from a furnace shell 11 to the furnace-interior surface in the conventional blast furnace.
  • a lever length i.e. the length for the blowpipe 31 and the tuyere 32 penetrating the thickness T1 to be supported in a cantilevered manner
  • shifting of the position of the tuyere 32 on the furnace-interior surface is reducible, which is effective for a stable operation.
  • the tuyere 32 can be inhibited from being pushed up due to thermal deformation of the refractory blocks.
  • the surface of the tuyere stave-cooler 23 defines the furnace-interior surface that is defined in conformity with a profile suitable for the blast furnace. Accordingly, the surface of the tuyere stave-cooler 23 (i.e., the furnace-interior surface) stays at the same level as the surface of the tuyere brick 5 (see Fig. 3 ).
  • the thickness of the tuyere section is reduced by positioning the furnace shell 21 close to the furnace-interior surface as compared with the conventional furnace shell 11 (i.e. by decreasing a diameter at the tuyere section of the furnace body).
  • a refractory filler 29 (e.g., refractory mortar) is fed between the furnace shell 21 and the stable coolers (i.e. the hearth stave-cooler 22, the tuyere stave-cooler 23 and the bosh stave-cooler 24).
  • a seal plate 291 is disposed inside the cutout 231 through which the tuyere is inserted and the tuyere opening 211.
  • the seal plate 291 blocks the refractory filler 29 fed inside the furnace shell 21, so that a space defined by the cutout 231, the tuyere opening 211 and the blowpipe 31 is not filled with the filler but kept hollow.
  • an elastic refractory material 292 e.g., ceramic wool is interposed between the cutout 231 and the tuyere 32.
  • the assembly process of the exemplary embodiment is as follows.
  • the furnace shell 21 is built to define an outline of the furnace body. Then, the hearth stave-cooler 22 and the hearth wall brick 25 are installed inside the furnace shell 21. Subsequently, the tuyere stave-cooler 23 and the bosh stave-cooler 24 are installed on the upper side of the hearth stave-cooler 22 and the hearth wall brick 25.
  • the refractory material 292 is attached to the inside of the cutout 231 of the tuyere stave-cooler 23 and the seal plate 291 is provided to the inside of the cutout 231 and the tuyere opening 211.
  • the tuyere stock 33, the flexible joint 34, the blowpipe 31 and the tuyere 32 are assembled outside of the furnace.
  • the assembled tuyere stock 33 and the tuyere 32 are placed in front of the tuyere opening 211 and then the tuyere 32 and the blowpipe 31 are introduced into the furnace.
  • the refractory material 292 is interposed between the cutout 231 and the tuyere 32.
  • the tuyere 32 and the blowpipe 31 are disposed in the cutout 231, through which the tuyere is inserted, of the tuyere stave-cooler 23. At this time, the tuyere 32 projects from the tuyere stave-cooler 23 to the inside of the furnace.
  • the refractory filler 29 is fed inside the furnace shell 21.
  • the tuyere 32 can be easily replaced by removing the flexible joint 34 after stopping hot blast supply and subsequently pulling the blowpipe 31 and the tuyere 32 out of the furnace shell 31.
  • seal plate 29 for instance, a metallic plate and an elastomer material (e.g., heat-resisting rubber) are usable.
  • elastomer material e.g., heat-resisting rubber
  • the flexible joint 34 is interposed between the blowpipe 31 and the tuyere stock 33, the flexible joint can absorb a difference in thermal deformation between the furnace body and the bustle pipe.
  • the tuyere stave-cooler 23 is provided around the tuyere 32 inside the furnace shell 21 and defines the furnace-interior surface, conventionally required tuyere bricks can be omitted, thereby decreasing the thickness of the furnace body by the thickness of the tuyere bricks, so that a distance between the furnace shell 21 to which the blowpipe 31 is fixed and the tuyere 32 can be reduced.
  • the blowpipe 31 may be cantilevered to cause a large displacement of the position of the tuyere 32.
  • the conventionally required tuyere bricks see Fig. 3
  • the tuyere stave cooler 23 directly serves as the furnace-interior surface
  • the blowpipe 31 can be fixed to the furnace shell 21 at a predetermined posture and gas leakage from the tuyere opening 211 also can be prevented.
  • the blowpipe 31 and the tuyere 32 are disposed substantially orthogonal to the furnace shell 21, the tuyere 32 is often inclined down toward the hearth in practical use. Accordingly, the tuyere 32 may be attached to the blowpipe 31 in an inclined manner, or the blowpipe 31 may be fixed to the furnace shell 21 in an inclined manner.
  • the end of the blowpipe 31 is bent toward the hearth and the tuyere 32 connected to the end is inclined toward the hearth.
  • the cutout 231 formed in the tuyere stave-cooler 23 is also formed in an inclined manner. Note that the other arrangements in the exemplary embodiment shown in Fig. 2 are the same as those in exemplary embodiment of Fig. 1 .
  • the refractory blocks 232 and 242 are respectively provided to the tuyere stave-cooler 23 and the bosh stave-cooler 24 for protection of the surfaces thereof.
  • the arrangement of the refractory blocks 232 and 242 is not limited to such an intermittent arrangement, but may be disposed continuously to each other.
  • the refractory blocks 232 and 242 may be omitted when the surfaces of the stave coolers 23 and 24 can be sufficiently protected by a protection layer formed by a refractory material coating and the like over the surfaces of the stave coolers 23 and 24.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (2)

  1. Düsenstruktur (20) eines Hochofens, umfassend:
    ein Blasrohr (31), umfassend:
    Einen ersten Flansch (311), der an einer Peripherie des Blasrohrs (31) geformt und an einen Ofenmantel (21) angebracht ist; und
    einen zweiten Flansch, der an einem Ende des Blasrohrs (31) geformt ist;
    eine Düse (32), die an den zweiten Flansch angebracht ist, der am Ende des Blasrohrs (31) geformt ist, wobei die Düse (32) in eine Düsenöffnung (211) eingesetzt wird, die am Ofenmantel (21) geformt ist, wobei die Düsenöffnung (211) vom ersten Flansch (311) verschlossen wird;
    eine flexible Verbindung (34), die das Blasrohr (31) mit einem Düsenstock (33) verbindet; und
    einen Plattenkühler (23), der innen im Ofenmantel (21) um die Düse (32) herum bereitgestellt ist und eine Innenfläche des Hochofens formt.
  2. Düsenstruktur (20) des Hochofens nach Anspruch 1, wobei die Düsenöffnung (211) am Ofenmantel (21) um die Düse (32) herum geformt ist und mit einer ganzen Peripherie des ersten Flansches (311) verbunden ist, der an der Peripherie des Blasrohrs (31) geformt ist.
EP13788617.2A 2012-05-11 2013-05-10 Struktur für düsenabschnitt in hochofen Active EP2848705B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012110071 2012-05-11
PCT/JP2013/063139 WO2013168784A1 (ja) 2012-05-11 2013-05-10 高炉の羽口部構造

Publications (3)

Publication Number Publication Date
EP2848705A1 EP2848705A1 (de) 2015-03-18
EP2848705A4 EP2848705A4 (de) 2016-01-20
EP2848705B1 true EP2848705B1 (de) 2019-03-20

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EP13788617.2A Active EP2848705B1 (de) 2012-05-11 2013-05-10 Struktur für düsenabschnitt in hochofen

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EP (1) EP2848705B1 (de)
JP (1) JP5702889B2 (de)
KR (1) KR101789558B1 (de)
CN (1) CN104271774A (de)
BR (1) BR112014028084B8 (de)
RU (1) RU2563069C1 (de)
WO (1) WO2013168784A1 (de)

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Publication number Priority date Publication date Assignee Title
JP7133948B2 (ja) * 2018-03-06 2022-09-09 黒崎播磨株式会社 羽口の設置構造
CN108642254B (zh) * 2018-06-30 2024-04-02 中国航空工业标准件制造有限责任公司 甲醇裂解发生装置
US20230366050A1 (en) * 2020-09-15 2023-11-16 Arcelormittal Device to inject a reducing gas into a shaft furnace
EP4214339A1 (de) * 2020-09-15 2023-07-26 ArcelorMittal Hochofen zur herstellung von eisen
LU102097B1 (en) * 2020-09-28 2022-03-29 Wurth Paul Sa Reducing gas injection System
LU102096B1 (en) 2020-09-28 2022-03-29 Wurth Paul Sa Exchangeable cooled nose with ceramic injector passage
CN115404294B (zh) * 2022-08-30 2023-07-18 中国一冶集团有限公司 一种高炉风口大套安装对位装置

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Also Published As

Publication number Publication date
CN104271774A (zh) 2015-01-07
BR112014028084A2 (pt) 2017-06-27
BR112014028084B1 (pt) 2023-01-24
WO2013168784A1 (ja) 2013-11-14
KR20150009545A (ko) 2015-01-26
BR112014028084B8 (pt) 2023-04-18
KR101789558B1 (ko) 2017-11-20
JPWO2013168784A1 (ja) 2016-01-07
EP2848705A1 (de) 2015-03-18
RU2563069C1 (ru) 2015-09-20
JP5702889B2 (ja) 2015-04-15
EP2848705A4 (de) 2016-01-20

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