EP1914322A1 - Feuerfester Ofenstein - Google Patents

Feuerfester Ofenstein Download PDF

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Publication number
EP1914322A1
EP1914322A1 EP08001504A EP08001504A EP1914322A1 EP 1914322 A1 EP1914322 A1 EP 1914322A1 EP 08001504 A EP08001504 A EP 08001504A EP 08001504 A EP08001504 A EP 08001504A EP 1914322 A1 EP1914322 A1 EP 1914322A1
Authority
EP
European Patent Office
Prior art keywords
bricks
grid
refractory furnace
brick
sidewalls
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Withdrawn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
EP08001504A
Other languages
English (en)
French (fr)
Inventor
Jim Black
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.)
Altrad York Linings Ltd
Original Assignee
York Linings International 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35516475&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1914322(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by York Linings International Ltd filed Critical York Linings International Ltd
Publication of EP1914322A1 publication Critical patent/EP1914322A1/de
Withdrawn legal-status Critical Current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
    • C21B7/04—Blast furnaces with special refractories
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings
    • 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
    • F27D1/042—Bricks shaped for use in regenerators

Definitions

  • the present invention relates to a refractory furnace brick (1) and to burners utilizing a grid of such bricks e.g. in blast furnaces and the like.
  • Conventional blast furnace stoves utilize burners made up of successive courses of bricks, each course comprising bricks of different sizes, the courses forming overlapping grids which facilitate combustion of the furnace gases.
  • Such burners are subjected to extremely high temperatures and are also impacted by solid debris which can result in failure, particularly of the smaller bricks.
  • An object of the present invention is to provide a simpler construction which can overcome or alleviate at least some of the above disadvantages.
  • the present invention provides a refractory furnace brick (1) having a longitudinal central bore (A) surrounded by sidewalls, the brick having a transverse cross-section in which corner regions of the junctions of the sidewalls are shaped externally to interface with external corner regions of neighbouring furnace bricks when disposed in a regular two dimensional grid of such bricks.
  • An advantage of such a construction is that relatively small bricks which are correspondingly more susceptible to breakage can be eliminated. Furthermore the manufacturing requirements are simplified.
  • corner regions are chamfered to form mating faces.
  • the chamfering reduces the pressure at the interfacial regions, thereby reducing the risk of fracturing of the bricks, and also stabilizes the arrangement.
  • the interfacial regions comprise ridge portions which can interlock with the ridge portions of neighbouring bricks in said regular two dimensional grid. This feature further stabilizes the construction and obviates the requirement for cement joints.
  • the refractory furnace brick (1) is so shaped and dimensioned that the transverse cross-section of said upright central bore is substantially the same as that of each neighbouring bore defined by the spacing between opposed external brick surfaces in such a regular two dimensional grid. This feature ensures that the grid openings are of a uniform size and facilitates good combustion.
  • the area of said transverse cross-section of said upright central bore is within ⁇ 20% of that of each said neighbouring bore. More preferably each dimension of said transverse cross-section of said upright central bore is within ⁇ 10% of the corresponding dimension of said neighbouring bore.
  • the refractory furnace brick (1) 1 (which is suitably composed of high-alumina firebrick composition) is substantially rectangular in cross-section and has a substantially rectangular upright central bore A as shown.
  • the two longer sidewalls have rounded ridge portions R1 which project beyond flat faces F4 at the bottom of the two shorter sidewalls.
  • the longer sidewalls have external faces F1 which define substantially rectangular bores between the bricks when disposed in a grid as described below with reference to Figure 4 .
  • the outer faces F2 of the shorter sidewalls constitute the other internal faces of the neighbouring bores in the grid as will become apparent from Figure 4 .
  • the shorter sidewalls have longitudinal ridges R whose extremities are defined by faces F2.
  • the upright longitudinal edges of these ridges enable the furnace bridge to interlock when assembled into a grid, and lie adjacent chamfered surfaces F3 at the four corners of the block which interface with the chamfered corners of neighbouring bricks as will become apparent from the discussion of Figure 5 below.
  • the refractory furnace brick (1) 2 showing in Figure 2 is intended to be assembled into a grid supporting an upper capping course composed of bricks 1 and it will be noted that the longer sidewalls and upper ridges r1 which are similar to ridges R1 of brick 1 and that the shorter sidewalls have upper end faces f4 which are similar to flat faces F4 of furnace brick 1.
  • the furnace bricks 1 when the furnace bricks 1 are inverted they can be placed on the furnace bricks 2 with the ridges R1 sitting on end faces f4 and the ridges r1 contacting the faces F4.
  • the upper capping course to be displaced horizontally relative to the lower capping course as necessary since there is no interlocking between the flat faces f4/F4 and the ridges R1/r1.
  • the lower end portions of the sidewalls have flat faces (not shown) unlike the ridged portions of the bricks 1 since they rest on flat surfaces of a lower grid.
  • the bricks 2 are otherwise similar to the bricks 1, in particular by including external sidewall faces f1 and f2 which define neighoburing bores in the lower grid of Figure 4 , by incorporating a ridge R' similar to the ridge R of brick 1 which ensures interlocking between neighbouring bricks and by incorporating chamfered mating surfaces f3 at the respective corners.
  • an upper layer of furnace bricks 1 can be assembled to form a regular grid with each brick contacting neighbouring bricks as its chamfered faces F3 and at the edge portions of its ridges R, and that the bricks 2 of the lower grid similarly define a lower grid.
  • the two grids are mutually offset by half a brick width along the direction of the shorter sidewalls, enabling airstreams a and gas streams b to be bifurcated and mixed to ensure efficient combustion.
  • the chamfered faces F3/f3 of the bricks 1/2 are spaced apart by ceramic fiber pads P having a thickness e.g. 1.5 mm to 2 mm corresponding to the brick spacing as best seen in Figure 5A .
  • These pads are relatively thin compared to the height of the ridges R, again as best seen in Figure 5A and hence do not prevent interlocking between the sides of the ridges and the faces F1 /f1.
  • Figure 6 shows the complete burner in cross-section, which is typically part of a blast furnace or other high temperature combustion unit. As shown in Figure 6A , a further expansion gap G is provided at the periphery of the burner grid.
  • the tapered upper extremities of the sidewalls prevent debris from catching on the grid walls which might otherwise lock the grid openings.
  • the tapered lower extremities of the furnace bricks 1 facilitate a smooth gas flow through the burner assembly.
  • the bores A within the interior of the respective bricks 1 are of essentially the same transverse cross-section as the bores B defined by the faces F1 and F2 of surrounding bricks.
  • the corners of the bores A are however rounded slightly to avoid weak points at these regions.
  • the outer bricks are cut in half where necessary in order to provide a roughly circular shape which can be confined within the outer walls W of the burner.
  • Figure 8 shows a similar arrangement of the furnace bricks 2 of the lower grid and again it will be seen that the bores A' are of a similar transverse cross-section to the bores B' defined by the faces f1 and f2 of surrounding bricks 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Finishing Walls (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Table Devices Or Equipment (AREA)
  • Laminated Bodies (AREA)
  • Gas Burners (AREA)
EP08001504A 2005-11-07 2006-10-20 Feuerfester Ofenstein Withdrawn EP1914322A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0522675A GB2432204B (en) 2005-11-07 2005-11-07 Refractory burner brick
EP06255415A EP1783233B1 (de) 2005-11-07 2006-10-20 Feuerfester Ofenstein

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06255415A Division EP1783233B1 (de) 2005-11-07 2006-10-20 Feuerfester Ofenstein

Publications (1)

Publication Number Publication Date
EP1914322A1 true EP1914322A1 (de) 2008-04-23

Family

ID=35516475

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06255415A Revoked EP1783233B1 (de) 2005-11-07 2006-10-20 Feuerfester Ofenstein
EP08001504A Withdrawn EP1914322A1 (de) 2005-11-07 2006-10-20 Feuerfester Ofenstein

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06255415A Revoked EP1783233B1 (de) 2005-11-07 2006-10-20 Feuerfester Ofenstein

Country Status (5)

Country Link
US (1) US20070101913A1 (de)
EP (2) EP1783233B1 (de)
AT (1) ATE389036T1 (de)
DE (1) DE602006000698T2 (de)
GB (1) GB2432204B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2600091T3 (pl) * 2011-12-02 2015-10-30 Refractory Intellectual Property Gmbh & Co Kg Konstrukcja nośna typu mostowego w piecu przemysłowym, wykonana z ognioodpornych cegieł ceramicznych
CN106440814B (zh) * 2016-09-13 2018-09-18 上海二十冶建设有限公司 一种加热炉炉墙保护性拆除中烧嘴砖的固定方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1849657A (en) * 1930-04-17 1932-03-15 Brassert & Co Hot blast stove
US2221416A (en) * 1939-04-03 1940-11-12 Freyn Engineering Co Checker construction
US4974666A (en) * 1988-05-31 1990-12-04 Toshiba Monofrax Co., Ltd. Refractory brick assembly for a heat regenerator

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221416A (en) * 1879-11-11 Improvement in horse-power machines
DE389284C (de) * 1924-01-29 Stein Und Thon Industriegesell Zum Ausmauern von Waermespeichern dieneder Hohlstein
US2833532A (en) * 1955-09-08 1958-05-06 Lewis B Ries Checker-brick and checker-work construction for regenerators
GB1324012A (en) * 1970-06-26 1973-07-18 Ferro Great Britain Ltd Furnaces
USD258386S (en) * 1978-10-30 1981-02-24 Quick Crete Products Corp. Refractory briquet lattice
AT365545B (de) * 1979-02-20 1982-01-25 Veitscher Magnesitwerke Ag Prismatischer hohlstein aus feuerfestem material
US4320612A (en) * 1979-02-26 1982-03-23 Resco Products, Inc. End block
AT373860B (de) * 1982-10-11 1984-02-27 Veitscher Magnesitwerke Ag Feuerfester, prismatischer hohlstein fuer den gitterbesatz der kammern regenerativ beheizter oefen
AT373861B (de) * 1982-10-25 1984-02-27 Veitscher Magnesitwerke Ag Liegender gitterbesatz fuer kammern regenerativ beheizter oefen
US4633636A (en) * 1985-01-22 1987-01-06 Alexander William E Retainer assembly
DE3533240A1 (de) * 1985-09-18 1987-03-26 Didier Werke Ag Luftkuehlbare feuerraumwand
US4768578A (en) * 1987-04-06 1988-09-06 Sulit Rodialo D Regenerative heat exchange systems and refractory bricks therefore
JPH0753584B2 (ja) * 1988-10-31 1995-06-07 東芝モノフラックス株式会社 蓄熱室用耐火物
US5154224A (en) * 1990-11-02 1992-10-13 Toshiba Ceramics Co., Ltd. Refractory brick for a glass fusion furnace
US5954121A (en) * 1996-04-10 1999-09-21 Blasch Precision Ceramics, Inc. Refractory diffusor for industrial heat source
USD423114S (en) * 1997-05-27 2000-04-18 Crh Oldcastle, Inc. Paving stone
US7168218B2 (en) * 2004-06-11 2007-01-30 David Stalder Spratlen Mortarless fence block system
USD511579S1 (en) * 2004-08-16 2005-11-15 Jagna Ltd. Retaining wall block

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1849657A (en) * 1930-04-17 1932-03-15 Brassert & Co Hot blast stove
US2221416A (en) * 1939-04-03 1940-11-12 Freyn Engineering Co Checker construction
US4974666A (en) * 1988-05-31 1990-12-04 Toshiba Monofrax Co., Ltd. Refractory brick assembly for a heat regenerator

Also Published As

Publication number Publication date
US20070101913A1 (en) 2007-05-10
GB0522675D0 (en) 2005-12-14
DE602006000698D1 (de) 2008-04-24
EP1783233B1 (de) 2008-03-12
DE602006000698T2 (de) 2009-03-19
GB2432204B (en) 2010-05-12
EP1783233A1 (de) 2007-05-09
GB2432204A (en) 2007-05-16
ATE389036T1 (de) 2008-03-15

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