EP1330554B1 - Schlagpanzer für hochofen - Google Patents

Schlagpanzer für hochofen Download PDF

Info

Publication number
EP1330554B1
EP1330554B1 EP01969764A EP01969764A EP1330554B1 EP 1330554 B1 EP1330554 B1 EP 1330554B1 EP 01969764 A EP01969764 A EP 01969764A EP 01969764 A EP01969764 A EP 01969764A EP 1330554 B1 EP1330554 B1 EP 1330554B1
Authority
EP
European Patent Office
Prior art keywords
throat armour
plate
pockets
throat
armour according
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.)
Expired - Lifetime
Application number
EP01969764A
Other languages
English (en)
French (fr)
Other versions
EP1330554A1 (de
Inventor
Claude Pleimelding
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP1330554A1 publication Critical patent/EP1330554A1/de
Application granted granted Critical
Publication of EP1330554B1 publication Critical patent/EP1330554B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/08—Top armourings

Definitions

  • the present invention relates to throat armour for a blast furnace.
  • throat armour In a blast furnace, the use of throat armour to protect the outer shielding of the furnace above the charge against wear due to the raw materials loaded through the throat has long been known.
  • this throat armour was merely formed with refractory bricks. Such refractory bricks are, however, not very resistant to wear. Since then, many methods have been developed to increase the working life of the throat armour.
  • throat armour is nowadays formed using pig iron or cast steel shielding bricks.
  • These shielding bricks which are much smaller in size than the shielding plates, are overlapped in large numbers over several rows and fixed to the outer shielding of the blast furnace.
  • they form a smooth impact surface inside the furnace.
  • each brick is dish-shaped.
  • These dish-shaped bricks make it possible to form throat armour whose impact surface comprises material-retaining pockets.
  • throat armour is new, its material-retaining pockets are filled with a concrete having a good wear resistance. This wear-resistant concrete then forms the majority of the impact surface and thus reduces the exposure of the metallic bricks to wear.
  • Throat armour formed with dish-shaped bricks has an acceptable working life, but the fixing of the bricks to the outer shielding is complicated and the installation of the throat armour consequently takes a considerable time.
  • annular segments of the throat armour may be pre-assembled in the workshop. These pre-assembled segments comprise a metallic supporting plate on to which the metallic bricks are individually fixed. In order to install the throat armour in the furnace, it is then sufficient to fix the pre-assembled ring segments to the outer shielding of the furnace. However, even though the time taken for installation inside the furnace is thus greatly reduced, it should still be noted that the assembly of a segment of such throat armour in the workshop is far from simple. Another weakness of this type of throat armour originates from the large number of fixing elements required to fix the shielding bricks.
  • the objective of the present invention is to propose throat armour for a blast furnace which may be more easily installed, while having a working life that is comparable with, if not longer than, that of throat armour formed using pig iron or cast steel bricks.
  • the protective elements are no longer bricks but nodular graphite cast iron plates.
  • the present invention has in effect the merit of having noticed that throat armour formed with nodular graphite cast iron plates may attain a working life comparable with, if not longer than, throat armour formed using pig iron or cast steel bricks, with two conditions: (1) the plates are provided with superimposed rows of material-retaining pockets; and (2) the plates are provided with an internal cooling circuit behind said rows of material-retaining pockets. Because of the existence of these pockets, the plates have an excellent wear resistance with a weight that is considerably less than that of solid plates.
  • the rear part of the plate forms, in spite of a reduced thickness, a support for the pockets which is distinguished by excellent stability in shape and high mechanical strength over time.
  • the cooling of the plates also protects their fixing elements against overheating that could affect their mechanical strength.
  • approximately two thirds of the thickness of a plate are formed by material-retaining pockets, while the rest of the thickness of the plate forms a solid plate in which the internal cooling circuit is arranged.
  • the plates may be fixed to the outer shielding by means of threaded rods.
  • Fixing elements such as internally threaded bushes, are also advantageously anchored in the cooled rear part of the plate, which guarantees their strength over time.
  • the pockets are advantageously filled with a concrete having a good wear resistance. At least at the start of a blast furnace campaign, this wear-resistant concrete then forms the major part of the impact surface. As the wear-resistant concrete in the pockets wears away, said pockets are filled with charge material, which thus takes on the protective function of the initial wear-resistant concrete.
  • the internal cooling circuit is preferably cast in the plate. It may for example have a serpentine path or may comprise parallel vertical channels extending between two horizontal collectors.
  • the pockets have access openings in the impact surface of the throat armour, said openings penetrating the thickness of the plate obliquely, preferably making an angle between 30° and 50° with the vertical.
  • Such an inclination of the pockets promotes the retention of the wear-resistant concrete or the charge material in the pockets.
  • the lower edge of the opening of a pocket is advantageously formed by a vertical shoulder in order to promote still further the retention of the wear-resistant concrete or the charge material in the pockets.
  • the material-retaining pockets of an uppermost row preferably have access openings in the upper end surface of the plate.
  • the throat armour then comprises two superimposed plates, the upper plate has its lower edge bevelled, so as to give access to the pockets of the uppermost row of the lower plate. In this way, an excellent protection of the two superimposed plates is achieved at the level of their common joint.
  • FIGs 1 to 4 show an annular segment 10 of the throat armour of a blast furnace, which serves to protect the outer shielding of the furnace above the charge against wear by the raw materials loaded through the throat.
  • These annular segments 10 are arranged side by side so as to form a continuous ring at the level of the blast furnace throat.
  • a segment 10 may have, for example, a height of about 5 m and a width of about 1.0 m, so that the throat armour will be formed by some thirty segments 10 as shown in the figures.
  • the segment 10 consists of two superimposed plates 12, 12'.
  • Each plate 12, 12' comprises a rear surface 14, 14', which faces the outer shielding of the blast furnace, a front surface 16, 16', which is oriented towards the inside of the blast furnace and acts as the impact surface, two side surfaces 18, 20, 18', 20', an upper end 22, 22' and a lower end 24, 24'.
  • the rear surface 14, 14' advantageously has a shape that matches the shape of the inner surface of the outer shielding at the place where it is fixed (see in particular the rear surface 14' of the lower plate 12' in Figure 4).
  • Each plate 12, 12' is individually fixed to the outer shielding of the blast furnace. It can be seen in Figures 1 to 4 that, in the back 14, 14' of each plate 12, 12', four bushes 26, 26' are anchored, each provided with an internal thread. Into these bushes 26, 26' are screwed threaded rods (not shown) which are used to fix the plates 12, 12' to the outer shielding (not shown). Sealing is achieved by sealing caps (not shown) welded to the outer shielding.
  • the plates 12, 12' are moulded plates made of nodular graphite cast iron. In order to guarantee their stability in shape and their mechanical strength over time, they are provided with an internal cooling circuit. It can be seen in Figure 3 that a plate 12, 12' comprises two serpentine channels whose path is shown by the broken lines 28, 30 or 28', 30'. It can be seen in Figure 4 that these channels are formed by pipes 32, 32', which are cast in the plate 12, 12' near the rear surface 14, 14'. The ends of these pipes 32, 32' emerge from the rear surface 14, 14' of the plate 12, 12' and form the connecting pipes 34, 36 and 34', 36'. Said connecting pipes emerge imperviously through the outer shielding where they enable the plates 12, 12' to be integrated into a cooling system of the blast furnace. The imperviousness of the passage of the connections 34, 34', 36, 36' into the outer shielding is achieved, for example, by means of sealing sleeves and/or expansion joints connected between each connector 34, 34', 36, 36' and the outer shielding.
  • Each plate 12, 12' comprises, on the side of its front surface 16, 16', several rows of material-retaining pockets 40, 40' (see for example Figure 2).
  • These material-retaining pockets 40, 40' have access openings in the front surface 16, 16' of the plate 12, 12' and penetrate the thickness of said plate obliquely, making an angle of approximately 40° with the vertical (see Figure 4).
  • Vertical partitions 42, 42' delimit the pockets 40, 40' of a given row.
  • the lower edge of the opening of a material-retaining pocket 40, 40' is advantageously formed by a vertical shoulder 44, 44' (see for example Figure 2).
  • the material-retaining pockets 46, 46' of the uppermost row have their access openings in the surface of the upper end 22, 22' of the plate 12, 12'. It can be seen in Figure 4 that the upper plate 12 has its lower edge bevelled, so as to give access to the pockets 46' of the uppermost row of the lower plate 12'.
  • the dotted areas in the pockets 40, 40', 46, 46' represent a concrete 50 with a good wear resistance, which fills the pockets 40, 40', 46, 46' at least at the beginning of a blast furnace campaign.
  • This wear-resistant concrete 50 then forms more than three quarters of the impact surface 16, 16' of a plate 12, 12' and thus reduces the exposure of said plate to wear.
  • said pockets become filled with charge material, which thus takes on the protective function of the initial wear-resistant concrete. It remains to point out that the inclination of the pockets 40, 40', 46, 46' and the vertical shoulders 44, 44' promote the retention of the wear-resistant concrete or the charge material in the pockets 40, 40', 46, 46'.
  • two thirds of the thickness of a plate 12, 12' are formed by the material-retaining pockets 40, 40', 46, 46', while the rest of the thickness of a plate 12, 12' forms a solid plate in which said internal cooling circuit is arranged.
  • the plates 12, 12' have a weight that is considerably less than that of solid plates with the same thickness. Thanks to its internal cooling circuit, the rear third of the plate 12, 12' has an excellent stability of shape and a high mechanical strength over time.
  • the cooling of the plates 12, 12' also protects the plate-fixing elements against overheating which might affect their mechanical strength.
  • the bushes 26, 26' are anchored in the cool rear part of the plate.
  • the cooling circuit also has a beneficial effect on the wear resistance of the concrete in the material-retaining pockets and it promotes the deposition of the charge materials replacing the wear-resistant concrete at the end of the campaign.
  • the working life of the throat armour as described above may be estimated as equivalent to at least one blast furnace campaign, i.e. as at least 15 years.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (14)

  1. Schlagpanzer zum Schutz des äußeren Schutzpanzers eines Hochofens gegen Verschleiß oberhalb der Gicht, wobei der Schlagpanzer schützende Elemente umfasst, die am äußeren Schutzpanzer befestigt werden und eine Stossfläche (16, 16') bilden, die hauptsächlich aus Material zurückbehaltenden Taschen (40, 40', 46, 46') besteht,
    dadurch gekennzeichnet, dass
    die Schutzelemente aus Platten (12, 12') bestehen, die aus Kugelgraphitgusseisen hergestellt sind, wobei jede Platte (12, 12') mehrere Reihen von Material zurückbehaltenden Taschen (40, 40', 46, 46') umfasst und
    in diesen Platten (12, 12') ein inneres Kühlsystem (32, 32') vorgesehen ist, welches hinter den Reihen Material zurückbehaltender Taschen (40, 40', 46, 46') angeordnet ist.
  2. Schlagpanzer nach Anspruch 1 dadurch gekennzeichnet, dass etwa zwei Drittel der Dicke einer Platte (12, 12') aus den Material zurückbehaltenden Taschen (40, 40', 46, 46') bestehen, während die übrige Dicke der Platte (12, 12') eine feste Platte bildet, in welcher das genannte Kühlsystem (32, 32') angeordnet ist.
  3. Schlagpanzer nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass die Platten (12, 12') am äußeren Schutzpanzer durch Gewindestangen befestigt sind.
  4. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 3 dadurch gekennzeichnet, dass Befestigungselemente (26, 26') im gekühlten rückwärtigen Teil der Platte (12, 12') verankert sind.
  5. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 4 dadurch gekennzeichnet, dass die Taschen (40, 40', 46, 46') mit einem Beton (50) gefüllt werden, der eine gute Verschleißfestigkeit aufweist.
  6. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 5 dadurch gekennzeichnet, dass das innere Kühlsystem (32, 32') in die Platte (12, 12') eingegossen ist.
  7. Schlagpanzer nach Anspruch 6 dadurch gekennzeichnet, dass das innere Kühlsystem (32, 32') einen serpentinenähnlichen Pfad aufweist (28, 30).
  8. Schlagpanzer nach Anspruch 6 dadurch gekennzeichnet, dass das innere Kühlsystem parallele vertikale Kanäle umfasst, welche zwischen zwei horizontalen Kollektoren verlaufen.
  9. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 8 dadurch gekennzeichnet, dass die Taschen (40, 40') Einlassöffnungen in der Stossfläche (16, 16') des Schlagpanzers aufweisen und in die Dicke der Platte (12, 12') schräg eindringen.
  10. Schlagpanzer nach Anspruch 9 dadurch gekennzeichnet, dass die Taschen (40, 40', 46, 46') einen Winkel von zwischen 30° und 50° zur vertikalen Ebene bilden.
  11. Schlagpanzer nach Anspruch 9 oder 10 dadurch gekennzeichnet, dass die untere Kante der Öffnung einer Material zurückbehaltenden Tasche (40, 40', 46, 46') in Form einer vertikalen Schulter (44, 44') ausgeführt ist.
  12. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 11 dadurch gekennzeichnet, dass die vertikalen Unterteilungen (42, 42') die Taschen (40, 40', 46, 46') einer bestimmten Reihe abgrenzen.
  13. Schlagpanzer nach irgendeinem der Ansprüche 1 bis 11 dadurch gekennzeichnet, dass die Material zurückbehaltenden Taschen (46, 46') einer obersten Reihe Einlassöffnungen in der Oberfläche des oberen Endes (22, 22') der Platte (12, 12') aufweisen.
  14. Schlagpanzer nach Anspruch 13, der durch zwei übereinander liegende Platten (12, 12') gekennzeichnet ist, wobei die obere Platte (12) eine abgeschrägte untere Kante aufweist, sodass der Zugang zu den Taschen (46') der obersten Reihe der unteren Platte (12') möglich ist.
EP01969764A 2000-10-04 2001-09-24 Schlagpanzer für hochofen Expired - Lifetime EP1330554B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90649A LU90649B1 (fr) 2000-10-04 2000-10-04 Couronne de choc pour un haut fourneau
LU90649 2000-10-04
PCT/EP2001/011030 WO2002029122A1 (en) 2000-10-04 2001-09-24 Throat armour for a blast furnace

Publications (2)

Publication Number Publication Date
EP1330554A1 EP1330554A1 (de) 2003-07-30
EP1330554B1 true EP1330554B1 (de) 2004-03-31

Family

ID=19731936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969764A Expired - Lifetime EP1330554B1 (de) 2000-10-04 2001-09-24 Schlagpanzer für hochofen

Country Status (9)

Country Link
EP (1) EP1330554B1 (de)
AR (1) AR030793A1 (de)
AT (1) ATE263256T1 (de)
AU (1) AU2001289915A1 (de)
CZ (1) CZ298922B6 (de)
DE (1) DE60102598T2 (de)
LU (1) LU90649B1 (de)
TW (1) TW448283B (de)
WO (1) WO2002029122A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540081B1 (de) 2018-03-15 2022-09-21 Primetals Technologies Limited Plattenkühlerschutzsystem

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE638492C (de) * 1935-08-18 1936-11-16 Dortmund Hoerder Huettenver Ak Schlagpanzer fuer Schachtoefen, insbesondere Hochoefen
JPS61127802A (ja) * 1984-11-27 1986-06-16 Nippon Steel Corp 高炉用鉱石受金物
DE8804067U1 (de) * 1988-03-25 1988-05-19 Hermann Rappold & Co GmbH, 5160 Düren Verschleißplatte aus keramischem Werkstoff

Also Published As

Publication number Publication date
DE60102598D1 (de) 2004-05-06
AR030793A1 (es) 2003-09-03
EP1330554A1 (de) 2003-07-30
AU2001289915A1 (en) 2002-04-15
CZ298922B6 (cs) 2008-03-12
DE60102598T2 (de) 2005-02-03
CZ2003938A3 (cs) 2003-10-15
TW448283B (en) 2001-08-01
LU90649B1 (fr) 2002-04-05
WO2002029122A1 (en) 2002-04-11
ATE263256T1 (de) 2004-04-15

Similar Documents

Publication Publication Date Title
KR101616120B1 (ko) 야금로용 냉각 플레이트
US6404799B1 (en) Water-cooling panel for furnace wall and furnace cover of arc furnace
CN105849285B (zh) 用于冶金炉的板式冷却器以及保护板式冷却器的方法
CA2022276C (en) A cooling element for shaft furnaces
JP2012224914A (ja) ステーブ
US6257326B1 (en) Cooling elements for shaft furnaces
EP2673386B1 (de) Kühlplatte für einen metallurgischen ofen
EP1330554B1 (de) Schlagpanzer für hochofen
JP3796981B2 (ja) ステーブ
CN101040161B (zh) 冶金炉
US10533802B2 (en) Furnace bricks, coolers, and shells/bindings operating in systemic balance
CN214470084U (zh) 用于冶金炉的壁板保护系统及冶金炉壁板体
JP2914185B2 (ja) 高炉炉壁補修用の水冷型耐火物パネル
EP2294347B1 (de) Kühlplattenanordnung und verfahren zur installation von kühlplatten in einem metallurgischen ofen
JPH0663012B2 (ja) 高炉炉体保護壁
CN214496367U (zh) 用于冶金炉的壁板保护系统及冶金炉壁板体
SU1086017A1 (ru) Охлаждаема футеровка металлургической печи
US20190063839A1 (en) Cantilevered cooler shelf for refractory brick furnaces
KR100456036B1 (ko) 세로형 고로의 냉각 패널
CN117187464A (zh) 一种高炉风口小套防护结构及其制作方法
RU2235134C1 (ru) Плитовый холодильник для металлургических печей
JP2000046480A (ja) 転炉の副原料投入シュート
JPH10265814A (ja) 高炉炉口部の保護ライナ
GB1577721A (en) Blast furnaces
GB2236169A (en) Tuyere far blast furnace

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030127

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60102598

Country of ref document: DE

Date of ref document: 20040506

Kind code of ref document: P

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20040331

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050104

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180713

Year of fee payment: 18

Ref country code: DE

Payment date: 20180717

Year of fee payment: 18

Ref country code: NL

Payment date: 20180718

Year of fee payment: 18

Ref country code: IT

Payment date: 20180917

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180717

Year of fee payment: 18

Ref country code: AT

Payment date: 20180718

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60102598

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20191001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200401

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191001

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 263256

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190924

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190924

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190924