EP0618301A1 - Vorrichtung zum Einblasen vorgewärmter Luft in einen Schachtofen - Google Patents

Vorrichtung zum Einblasen vorgewärmter Luft in einen Schachtofen Download PDF

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Publication number
EP0618301A1
EP0618301A1 EP94101358A EP94101358A EP0618301A1 EP 0618301 A1 EP0618301 A1 EP 0618301A1 EP 94101358 A EP94101358 A EP 94101358A EP 94101358 A EP94101358 A EP 94101358A EP 0618301 A1 EP0618301 A1 EP 0618301A1
Authority
EP
European Patent Office
Prior art keywords
refractory
ball joint
brick
profiled
tubular element
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.)
Granted
Application number
EP94101358A
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English (en)
French (fr)
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EP0618301B1 (de
Inventor
Jean Benck
Pierre Mailliet
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
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Paul Wurth SA
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Filing date
Publication date
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0618301A1 publication Critical patent/EP0618301A1/de
Application granted granted Critical
Publication of EP0618301B1 publication Critical patent/EP0618301B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to a device for injecting preheated air into a shaft furnace consisting of several separate tubular elements consisting of an outer steel shield and an inner lining of cast refractory concrete, connected two by two by a spherical joint and a compensator.
  • the devices for injecting preheated air are exposed to mobility and leakage problems. Indeed, as a result of the high temperature of the preheated air (temperature of the order of 1,200 ° C. or more) and the high temperature prevailing inside the oven, the wall of the latter, as well as the supply line and the wind carrier are exposed to thermal expansion and deformation causing significant relative displacements between the supply line and the wall of the furnace. It is therefore necessary that the wind carrier is able to compensate for these relative displacements while avoiding leaks of gas or preheated air.
  • US Patent No. 3,766,868 provides a blast connection of the type described in the preamble.
  • This wind carrier was subsequently perfected by the design of universal joints with a spherical joint of the kind described in document DE-C2-2218331.
  • the articulations of this wind carrier allow the compensation of all relative movements between the supply line and the wall of the furnace.
  • the tightness at the joints is ensured by bellows compensators, while the mechanical stability is ensured for example by associated cardanic connections, at the two universal joints, at the two opposite ends of the central tubular element.
  • the most stressed and delicate place is always at the level of the joints. Indeed, the mobility of the patella relative to its base often causes friction of refractory concrete on refractory concrete. The refractory concrete at the tip of the ball joint can be damaged and fragments can possibly be torn off.
  • microcracks can form in certain places which are the cause of annoying circulation and vortices.
  • the object of the present invention is to provide a new system of articulations which better withstands both the thermal and mechanical stresses to which it is subjected.
  • the device proposed by the present invention is essentially characterized in that at least the convex ball joint of the spherical joint comprises a profiled refractory brick anchored in the lining of interior refractory concrete.
  • the radius of curvature of each spherical joint is of the order of magnitude of the external radius of the tubular elements. This small radius of curvature ensures better guiding of the ball joints in their base allowing the conservation of the same thickness of the joint during the angular movement.
  • the coating of refractory steel extends to the convex part of the patella and ends in a projecting lip on which the profiled refractory brick is supported.
  • the support lip combined with the reduced radius of curvature ensures that the support forces are always perpendicular to the radius of curvature. In this way, the risk of fragments being torn off from the profiled refractory brick is eliminated.
  • the concave base can also be formed from profiled refractory brick anchored in the interior lining of refractory concrete. This avoids the formation of microcracks and improves thermal insulation at the concave base of the ball joint.
  • An insulating mat can, if necessary, be interposed between the profiled refractory brick and the external shielding.
  • the ball joint and the tubular element can form a single block with the refractory lining of the tubular element, or the ball joint can constitute a separate element, mounted on the tubular element and separated from the inner lining of the latter by an annular seal.
  • the shielding of the tubular element and that of the adjacent tubing can be connected directly to each other through a compensator, or by means of a flange or a detachable weld.
  • a refractory soft seal between the ball joint and the plate can be partially attached to the shield and partially to the edge of the plate. It can also be partially attached in an interior housing of the cylindrical sheath and partially on the refractory. According to another variant, it can also be partially attached to the refractory and partially in a housing delimited by the upper part of the sheath and by a ring welded inside the shielding.
  • Figure 1 shows two tubular elements 10, 12 of a wind carrier connected by a ball joint 14 and a bellows compensator 16.
  • the tubular elements 10, 12 include an outer shield made of refractory steel 18 and an internal coating of cast refractory concrete 20.
  • the hot wind passes through a central lumen 22 arranged in the refractory concrete 20.
  • the articulation 14 is formed by a convex ball 24 and a concave plate 26.
  • the ball 24 is formed by a profiled refractory brick 28.
  • the brick comprises an annular anchoring surface 29 specially studied which makes it possible to fix it securely in the internal lining of refractory concrete poured 20.
  • the convex part of the ball joint 24 has a radius of curvature which is between 0.8 and 1.2 times the outside radius of the tubular elements 10, 12.
  • a sheath 30 of refractory steel extends up to the convex part of the ball 24 and ends with a projecting lip 32 which forms a bearing surface for the brick 28.
  • the convex ball 24 is connected to the tubular element 10 by a flange 34 and an annular seal 36. This facilitates the assembly and disassembly of the ball joint 24.
  • a space 38 which is sealed on its periphery by a soft seal 40 fixed to the shield 18 and by a soft seal 42 which adheres to the outer edge of the plate 26.
  • the soft seal 40 is attached to a housing 39 delimited by two rings welded inside the shield 18.
  • Figure 2 shows another preferred embodiment of a hinge for a blower.
  • an insulating mat 44 has been introduced which provides better thermal insulation of the convex ball joint 24 and of the compensator 16.
  • the anchoring surface 129 of the refractory brick 28 in the internal coating of cast refractory concrete 20 has a "dovetail" shape. This particular shape of the anchoring surface 129 keeps the refractory brick 28 in place and prevents it from moving vertically and horizontally.
  • FIG. 3 represents yet another preferred embodiment of an articulation of a wind-blower in which both the convex ball joint 24 and the hollow plate 26 are formed from profiled refractory bricks 28, 48.
  • An advantage of this embodiment is that the formation of microcracks at the level of the concave plate is eliminated.
  • a soft seal 142 attached to the refractory brick 48 of the concave plate 26, and the soft seal 40 seal the space provided between the convex ball 24 and the concave plate 26.
  • Figure 4 shows an articulation of a wind carrier in which the convex ball 24 and the concave plate 26 are formed in profiled refractory brick 28, 148.
  • An insulating mat 130 is interposed between the refractory steel shield 18 and the brick 148 to improve thermal insulation.
  • An anchoring surface 229 in the form of a "dovetail" maintains the brick 148 in the coating of cast refractory concrete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Joints Allowing Movement (AREA)
  • Slot Machines And Peripheral Devices (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Physical Vapour Deposition (AREA)
EP94101358A 1993-03-31 1994-01-31 Vorrichtung zum Einblasen vorgewärmter Luft in einen Schachtofen Expired - Lifetime EP0618301B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU88241A LU88241A1 (fr) 1993-03-31 1993-03-31 Dispositif d'injection d'air préchauffé dans un four à cuve
LU88241 1993-03-31

Publications (2)

Publication Number Publication Date
EP0618301A1 true EP0618301A1 (de) 1994-10-05
EP0618301B1 EP0618301B1 (de) 1998-08-12

Family

ID=19731397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101358A Expired - Lifetime EP0618301B1 (de) 1993-03-31 1994-01-31 Vorrichtung zum Einblasen vorgewärmter Luft in einen Schachtofen

Country Status (9)

Country Link
US (1) US5462433A (de)
EP (1) EP0618301B1 (de)
AT (1) ATE169684T1 (de)
BR (1) BR9400898A (de)
CZ (1) CZ283132B6 (de)
DE (1) DE4404316C2 (de)
ES (1) ES2121101T3 (de)
LU (1) LU88241A1 (de)
SK (1) SK281401B6 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU91897B1 (fr) * 2011-11-09 2013-05-10 Wurth Paul Sa Système de liaison étanche entre une tuyère et un busillon d'amenée de vent chaud pour un four à cuve, et haut-fourneau sidérurgique comportant un telsystème
CN107228249A (zh) * 2017-05-17 2017-10-03 洛阳双瑞特种装备有限公司 一种防止物料磨损波纹管的铰链型膨胀节

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000011766A1 (en) 1998-08-20 2000-03-02 Orbotech Ltd. Laser repetition rate multiplier
IL133889A (en) 2000-01-05 2007-03-08 Orbotech Ltd Pulse light pattern writer
US6176526B1 (en) 1999-01-04 2001-01-23 Lever Brother Company Division Of Conopco Expansion joint
DE19905649A1 (de) * 1999-02-11 2000-08-17 Kloeckner Humboldt Wedag Kompensator zum Ausgleich von Wärmedehnungen
DE10219469B4 (de) * 2002-04-30 2004-08-05 Alfred Liebig Gelenk-Kompensator
CN100593680C (zh) * 2006-01-27 2010-03-10 宝山钢铁股份有限公司 一种热风炉热风管道膨胀节内衬结构
CN100404696C (zh) * 2006-07-04 2008-07-23 世林（漯河）冶金设备有限公司 一种高炉进风装置波纹管补偿器
NL2003916C2 (en) * 2009-12-07 2011-06-09 Heatteq Refractory Holding B V Hot blast transportation apparatus, comprising a refractory lining contained within a steel outer shell.
DE102010007122A1 (de) * 2010-02-05 2011-08-11 SAB S.àr.l. Düsenstock
DE102010015842A1 (de) 2010-03-05 2011-09-08 Z & J Technologies Gmbh Heißwinddüsenstock für einen Schachtofen, insbesondere Hochofen
LU102097B1 (en) 2020-09-28 2022-03-29 Wurth Paul Sa Reducing gas injection System

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2039327A1 (de) * 1969-04-21 1971-01-15 Wurth Anciens Ets Paul
FR2134390A2 (en) * 1971-04-29 1972-12-08 Wurth Anciens Ets Paul Cupolar furnace air feed - with heat-protected cardan joint compensator shafts
US3766868A (en) * 1972-02-22 1973-10-23 Anciens Etablissements P Warth Tuyere stock for furnaces
DE7325087U (de) * 1973-07-07 1973-11-08 Steinfurter Eisenwerk Gmbh Düsenstock
FR2285582A1 (fr) * 1974-09-18 1976-04-16 Wurth Anciens Ets Paul Dispositif d'injection d'air prechauffe pour fours
EP0484720A1 (de) * 1990-11-09 1992-05-13 Paul Wurth S.A. Vorrichtung zum Einblasen von vorerhitzter Luft in einem Schachtofen und Verfahren zum Herstellen konvexer Teile von Kugelgelenken für Düsenstöcke
US5209657A (en) * 1990-11-09 1993-05-11 Paul Wurth S.A. Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU64911A1 (de) * 1972-03-06 1972-07-06

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2039327A1 (de) * 1969-04-21 1971-01-15 Wurth Anciens Ets Paul
FR2134390A2 (en) * 1971-04-29 1972-12-08 Wurth Anciens Ets Paul Cupolar furnace air feed - with heat-protected cardan joint compensator shafts
DE2218331C2 (de) * 1971-04-29 1982-09-30 Société Anonyme des Anciens Ets. Paul Wurth, Luxembourg Heißwinddüsenstock für Schacht-, insbesondere Hochöfen
US3766868A (en) * 1972-02-22 1973-10-23 Anciens Etablissements P Warth Tuyere stock for furnaces
DE7325087U (de) * 1973-07-07 1973-11-08 Steinfurter Eisenwerk Gmbh Düsenstock
FR2285582A1 (fr) * 1974-09-18 1976-04-16 Wurth Anciens Ets Paul Dispositif d'injection d'air prechauffe pour fours
EP0484720A1 (de) * 1990-11-09 1992-05-13 Paul Wurth S.A. Vorrichtung zum Einblasen von vorerhitzter Luft in einem Schachtofen und Verfahren zum Herstellen konvexer Teile von Kugelgelenken für Düsenstöcke
US5209657A (en) * 1990-11-09 1993-05-11 Paul Wurth S.A. Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU91897B1 (fr) * 2011-11-09 2013-05-10 Wurth Paul Sa Système de liaison étanche entre une tuyère et un busillon d'amenée de vent chaud pour un four à cuve, et haut-fourneau sidérurgique comportant un telsystème
WO2013068333A1 (fr) * 2011-11-09 2013-05-16 Paul Wurth S.A. Systeme de liaison etanche entre une tuyere et un busillon d'amenee de vent chaud pour un four a cuve, et haut fourneau siderurgique comportant un tel systeme
CN103930572A (zh) * 2011-11-09 2014-07-16 保尔伍斯股份有限公司 用于竖炉的风口与热鼓风进入管口之间的密封连接系统、以及包括该系统的炼钢鼓风炉
KR101492483B1 (ko) * 2011-11-09 2015-02-11 풀 부르스 에스.에이. 용광로를 위한 송풍구 및 고온의 블라스트 주입 노즐 사이의 누설 방지 연결 시스템 및 상기 시스템을 포함하는 제강 용광로
CN103930572B (zh) * 2011-11-09 2015-09-09 保尔伍斯股份有限公司 用于竖炉的风口与热鼓风进入管口之间的密封连接系统、以及包括该系统的炼钢鼓风炉
US9169525B2 (en) 2011-11-09 2015-10-27 Paul Wurth S.A. System of leaktight connection between a tuyere and a hot blast inlet nozzle for a shaft furnace, and steel-making blast furnace comprising such a system
EA026147B1 (ru) * 2011-11-09 2017-03-31 Поль Вурт С.А. Герметизированная система соединения между дутьевой фурмой и кольцевым воздухопроводом горячего дутья для шахтной печи и сталеплавильная доменная печь, включающая в себя такую систему
CN107228249A (zh) * 2017-05-17 2017-10-03 洛阳双瑞特种装备有限公司 一种防止物料磨损波纹管的铰链型膨胀节

Also Published As

Publication number Publication date
DE4404316A1 (de) 1994-10-06
LU88241A1 (fr) 1994-10-03
ATE169684T1 (de) 1998-08-15
CZ73894A3 (en) 1995-08-16
ES2121101T3 (es) 1998-11-16
SK281401B6 (sk) 2001-03-12
DE4404316C2 (de) 2002-11-21
US5462433A (en) 1995-10-31
EP0618301B1 (de) 1998-08-12
SK36794A3 (en) 1994-10-05
CZ283132B6 (cs) 1998-01-14
BR9400898A (pt) 1994-11-22

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