(19)
(11)EP 3 254 044 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
17.06.2020 Bulletin 2020/25

(21)Application number: 16704345.4

(22)Date of filing:  02.02.2016
(51)International Patent Classification (IPC): 
F27D 1/02(2006.01)
F27D 1/16(2006.01)
F23M 5/02(2006.01)
F27D 1/14(2006.01)
C10B 29/02(2006.01)
F23M 5/06(2006.01)
(86)International application number:
PCT/US2016/016105
(87)International publication number:
WO 2016/126666 (11.08.2016 Gazette  2016/32)

(54)

SEGMENTED REFRACTORY RIDER ARCH

SEGMENTIERTER FEUERFESTER GEWÖLBEBOGEN

ARCHE REFRACTAIRE SEGMENTÉE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 03.02.2015 US 201562111390 P
25.02.2015 GB 201503119

(43)Date of publication of application:
13.12.2017 Bulletin 2017/50

(73)Proprietor: Fosbel, Inc.
Brook Park, OH 44142 (US)

(72)Inventors:
  • CAROLLA, Lou
    Brook Park, OH 44142 (US)
  • SMITH, Michael, P.
    Brook Park, OH 44142 (US)
  • BOWSER, Alan E.
    Brook Park, OH 44142 (US)

(74)Representative: McNab, Donald C. et al
Marks & Clerk LLP 40 Torphichen Street
Edinburgh EH3 8JB
Edinburgh EH3 8JB (GB)


(56)References cited: : 
EP-A1- 1 255 088
GB-A- 945 640
US-A- 3 489 401
GB-A- 938 363
JP-A- 2007 263 447
US-A1- 2006 272 264
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    CROSS-REFERENCE TO RELATED APPLICATIONS


    FIELD



    [0001] The embodiments disclosed herein relate generally to integral self-supporting composite refractory components formed of multiple refractory bricks and/or blocks integrally bonded together and to methods for making such structures.

    BACKGROUND



    [0002] Several industries employ relatively massive refractory structures formed of refractory bricks of varying sizes and shapes. For example, coke ovens and glass furnaces, including regenerators associated with such furnaces, traditionally comprise massive refractory brick structures having relatively large-scale parallel walls, crown arches and floor arches (typically termed rider arches in art parlance) constructed from a large variety of differently shaped individual refractory bricks. The construction and repair of such refractory structures, as described in EP 1 255 088 A1, can be extremely tedious and time consuming due to the individual refractory brick construction thereby resulting in costly downtime and a concomitant economic loss.

    [0003] Recently, it has been proposed to provide relatively monolithic refractory components to reduce the number of individual bricks forming the refractory structures and thereby reduce the downtime required to construct and/or repair the refractory structure. See in this regard, U.S. Patent Nos. 8,640,635, 8266,853 and 6,066,236 and copending U.S. Provisional Patent Application Serial No. 62/111,447 filed on February 3, 2015 (Atty. Dkt. No. BHD-6141-17).

    [0004] While these prior proposals are satisfactory, continual improvement in the construction and repair/servicing of relatively massive refractory structures (e.g., coke ovens, glass furnaces, forehearths, regenerators and the like) is sought. For example, it would be desirable if integral self-supporting refractory components could be formed from existing relatively smaller refractory brick and/or relatively larger refractory block so that the refractory components could be formed remotely and then transported to the point of use for installation. This off-site fabrication of the refractory components could in turn produce extensive labor cost savings since individual bricks/blocks would not need to be assembled on site. It is towards providing such improvement that the embodiments of the invention described herein are directed.

    SUMMARY



    [0005] In general, the embodiments disclosed herein are directed toward refractory components (e.g. crown or rider arches associated with a refractory structure such as coke ovens, glass furnaces, regenerators and the like) that are formed by multiple refractory members bonded to one another by a bonding agent to provide an integral self-supporting structure.

    [0006] The present invention provides a segmented refractory rider arch according to independent claim 1 and further embodiments are described in dependent claims 2-4.
    to establish the respective multiple refractory blocks bonded to one another.

    [0007] These and other aspects and advantages of the present invention will become more clear after careful consideration is given to the following detailed description of the preferred exemplary embodiments thereof.

    BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS



    [0008] The disclosed embodiments of the present invention will be better and more completely understood by referring to the following detailed description of drawing 5, whereby drawings 1-4, 6 and 7 are describing embodiments, which are not part of the invention:

    FIG. 1 is a front elevational view of a refractory arch component formed of multiple refractory bricks;

    FIG. 2 is a front perspective view of the refractory arch component depicted in FIG. 1;

    FIG. 3 is a front elevational view of a refractory arch component formed of multiple refractory bricks;

    FIG. 4 is a front perspective view of the refractory arch component depicted in FIG. 3;

    FIG. 5 is a front perspective view of a refractory rider arch component formed of refractory blocks in accordance with the present invention;

    FIG. 6 is a perspective view of refractory wall module component; and

    FIG. 7 is a perspective view of a refractory wall module component.


    DETAILED DESCRIPTION



    [0009] As used herein and in the accompanying claims, the term "brick" is intended to refer to a generally small sized solid refractory member that may be readily handled and manipulated manually by a laborer (e.g., a bricklayer). The term "block" is intended to refer to a generally large sized solid refractory member that requires mechanical assistance for handling and manipulation (e.g., via suitable hoists, lifts and the like). More specifically, a "block" as used herein and the accompanying claims is intended to refer to a refractory member whose weight cannot be lifted manually by a single individual in accordance with generally accepted guidelines according to the US Occupational Safety and Health Administration (OSHA), e.g., typically an object which weighs more than about 50 pounds. Conversely, as used herein and in the amended claims, the term "brick" refers to a generally small sized solid refractory member that may easily be handled and manipulated by a single individual in accordance with the generally accepted OSHA guidelines, e.g., typically an object weight less than about 50 pounds.

    [0010] The refractory "brick" and "block" members employed by the embodiments disclosed herein are most preferably formed of a refractory material (e.g., fused silica) that is mechanically pressed and cured at high temperatures (e.g., up to about 1400°C) as described, for example, in U.S. Patent Nos. 2,599,236, 2,802,749 and 2,872,328, the entire contents of each such patent being expressly incorporated hereinto by reference. If the refractory "block" members are of an exceptionally large size (e.g., block members having a size of generally about 650 mm or greater) may be formed by casting and heat curing a refractory material (e.g., fused silica) as described in U.S. Patent Nos. 5,277,106 and 5,423,152, the entire contents of each such patent being expressly incorporated hereinto by reference.

    [0011] Accompanying FIGS. 1 and 2 depict a refractory arch component 10 formed of multiple refractory bricks in accordance with an embodiment of the present invention. More specifically, the arch component 10 is formed of individual elongate arch bricks (a representative few of which are identified by reference numeral 12 in FIGS. 1 and 2) that may or may not be tapered (e.g., voussoirs). Each springer brick 14 of the arch component 10 is supported against multiple adjacent skewback blocks 16. Several courses of creeper bricks (a representative few of which are identified by reference numeral 18) are laid onto the extrados curve formed by arch bricks 12.

    [0012] As can be seen in FIG. 2, a pair of haunch bricks 12a forming the crown extend outwardly from the arch face a distance substantially equivalent to the width of the outermost skewback blocs 16. The outwardly extending pair of haunch bricks 12a thereby provide lateral support between adjacent similarly constructed arches when installed onto the arch support piers (not shown).

    [0013] Important to the embodiments disclosed herein the adjacent ones of the bricks 12, 14, 16 and 18 are physically bonded to one another so that the collection of bonded bricks 12, 14, 16 and 18 form the arch component 10 as an integral self-supporting and transportable structure. Thus, the bricks 12, 14, 16 and 18 may be assembled, laid and/or otherwise conjoined to form the arch component 10. According to the embodiments disclosed herein, the bricks 12, 14, 16 and 18 are preferably bonded to one another by a suitable sacrificial or non-sacrificial bonding agent, such as an epoxy adhesive bonding agent. By the term "sacrificial bonding agent" is meant to refer to bonding agents that allow the refractory bricks and blocks to be bonded to one another to form an integral self-supporting transportable refractory component, but which are consumed or combusted in the high heat (e.g., temperatures of about 1100°C to about 1650°C) during use of the refractory structure in which the component is installed. The individual bricks or blocks forming the refractory component will remain intact when the sacrificial bonding agent is consumed or combusted by virtue of the refractory component design and the structural support provided by other refractory components installed to form the complete refractory structure. By the term "non-sacrificial bonding agent" is meant a bonding agent that remains intact and is not consumed or combusted at the high temperatures associated with the refractory structure in which the component is installed.

    [0014] As noted above the preferred bonding agent is an epoxy adhesive bonding agent. As noted previously, the epoxy bonding agent may be sacrificial or non-sacrificial.

    [0015] Accompanying FIGS. 3 and 4 depict another embodiment of an arch component 20 that may advantageously be employed as a crown arch in a glass furnace regenerator structure (see copending U.S. Application Serial No. 14/939,210 filed on November 12, 2015 (Atty. Dkt. No. BHD-6141-38)), the entire content of which is expressly incorporated hereinto by reference). As is shown, the arch component 20 of FIGS. 3 and 4 is structurally similar to the arch component 10 described above in reference to FIGS. 1 and 2 as it is comprised of individual elongate arch blocks (a representative few of which are identified by reference numeral 22 in FIGS. 3 and 4) that may or may not be tapered (e.g., voussoirs). Springer bricks 24 of the arch component 20 are supported against adjacent skewback blocks 26 and have a greater face depth as compared to the arch blocks 22.

    [0016] As with the embodiment of the arch component 10 described above in reference to FIGS. 1-2, adjacent ones of the bricks 22, 24 and 26 are physically bonded to one another so that the collection of bonded bricks 22, 24 and 26 form the arch component 20 as an integral self-supporting and transportable structure. Thus, the bricks 22, 24 and 26 may be assembled, laid and/or otherwise conjoined to form the arch component 20. The bricks 22, 24 and 26 are preferably bonded to one another by a suitable sacrificial or non-sacrificial bonding agent, such as an epoxy bonding agent as described previously.

    [0017] An exemplary rider arch 50 for a glass furnace regenerator is depicted in FIG. 5. As shown, the rider arch 50 includes opposed end block regions 52, 54 interconnected to one another by a central bridge region 56. The end block regions 52, 54 are generally vertically oriented and are adapted for being stacked onto a respective foundation block (not shown) associated with the regenerator structure. In order to provide interlocking relationship with the foundation blocks of the regenerator structure and to minimize loss of combustion air and gasses, the bottom surface 52-1, 54-1 of each end block 52, 54 may be provided with an elongate tongue 52-2, 54-2 cooperating with an correspondingly shaped groove formed on an upper surface of the immediately subjacent foundation block.

    [0018] The central bridge region 56 interconnects the end block regions 52, 54 and defines the upper horizontal surface 50-1 of the rider arch 50. The bridge region 56 also includes a lower arcuate surface 50-2 opposite to the upper horizontal surface 50-1 extending from each of the lower surfaces 52-1, 54-1 of the end blocks 52, 54, respectively. An apex of the lower arcuate surface 50-2 is generally located at a latitudinal midplane of the bridge region 56.

    [0019] The bridge region 56 includes opposed parallel vertically planar pairs of end web sections 56-1a, 56-1b and 56-2a, 56-2b, respectively, and an opposed parallel vertically planar pair of central web sections 56-3a, 56-3b. Vertical planar channels 58-1, 58-2 and 58-3 are thus defined between the opposed pairs of web sections 56-1a and 56-1b, 56-2a and 56-2b, and 56-3a and 56-3b, respectively. A pair of downwardly and inwardly convergent latitudinal rib elements 60-1, 60-2 separate the lateral channels 58-1 and 58-2 from the central channel 58-3.

    [0020] Each of the rib elements 60-1, 60-2 terminate in an opposed pair of lateral spacer ribs 60-1a, 60-1b and 60-2a, 60-2b, respectively. The lateral spacer ribs 60-1a, 60-1b and 60-2a, 60-2b of each rider arch 50 cooperate with adjoining spacer ribs 60-1a, 60-1b and 60-2a, 60-2b of an adjacently positioned rider arch 50 in the regenerator structure so as to establish collectively respective sets of vertically oriented channels 62-1, 62-2 and 62-3. Thus, the channels 58-1, 58-2 and 58-3 formed by an individual one of the rider arches 50 as well as the vertically oriented channels 62-1, 62-2 and 62-3 formed by adjacently positioned pairs of the rider arches 50 will allow combustion air and gases in the space 14-2 to communicate with the checker bricks (not shown) supported by the floor established by the upper planar surface 50-1 of the rider arches 50.

    [0021] As is shown in FIG. 5, the rider arch 50 may be segmented along the dashed lines depicted therein so as to establish respective refractory blocks 70a-70f that may be pre-formed (e.g., by pressing or casting) and assembled by a bonding agent (e.g., a sacrificial or non-sacrificial epoxy bonding agent as described previously), so that as to form rider arch 50. Thus, the rider arch may be bisected longitudinally and latitudinally so as to substantially split the lateral spacer ribs 60-1a, 60-1b and 60-2a, 60-2b. In this regard, it will be observed that the refractory blocks 70c and 70d will thereby serve as keystones for the rider arch 50 to thereby maintain its structural integrity in use even should a sacrificial epoxy be employed for bonding.

    [0022] The refractory components as described herein may also be embodied in the form of self-supporting weight-bearing wall modules 60, 70 as depicted in accompanying FIGS. 6 and 7, respectively. In this regard, FIG. 6 depicts a self-supporting wall module 60 having formed of several courses of exterior, intermediate and interior bricks (a representative few of which are identified in FIG. 6 by reference numerals 62, 64 and 66, respectively). The bricks 62, 64 and 66 preferably vary compositionally one from another so as to have different relative thermal transfer characteristics to thereby allow the module 60 to be "engineered" to exhibit a thermal transfer gradient across its cross-sectional dimension from the exterior (cold) side of the wall module 60 to the interior (hot) side of the wall module 60.

    [0023] Similar to the embodiments described previously, each of the bricks 62, 64, 66 will be bonded to adjacent bricks by a suitable sacrificial or non-sacrificial bonding agent, such as an epoxy adhesive bonding agent. As such, the bonded bricks 62, 64, 66 will form a self-supporting module 60 that may be integrally lifted and/or maneuvered (e.g., by suitable hoisting apparatus) as a one-piece structural element and placed into a wall of a refractory structure. In the interest of improved structural integrity, one or more of the courses will include dimensionally extended bricks (depicted in FIG. 6 by bricks 62a and 66a) without intermediate bricks therebetween that are bonded together at their abutted ends.

    [0024] The embodiment of the module 70 depicted in FIG. 7 is similar to the module 60 described above in reference to FIG. 6 in that exterior and interior bricks 72, 76 are provided. However, unlike the module 60, the intermediate bricks 64 have been replaced by a monolithic cast intermediate block 74. The bricks 72, 76 and the intermediate block 74 may vary compositionally one from another so as to have different relative thermal transfer characteristics to thereby allow the module 70 to be "engineered" to exhibit a thermal transfer gradient across its cross-sectional dimension from the exterior (cold) side of the wall module 70 to the interior (hot) side of the wall module 70. In the interests of improved structural integrity, the block 74 may be cast so as to include a recessed tongue channel 74a to receive therein the bricks of at least one course that are dimensionally extended in a cross-sectional direction.


    Claims

    1. A segmented refractory rider arch (50) comprising multiple refractory components bonded to one another by a bonding agent, wherein the refractory rider arch (50) further comprises:

    an opposed pair of substantially vertically oriented end blocks (52, 54);

    a central bridge region (56) having an upper horizontal surface (50-1) and a lower arcuate surface (50-2) opposite the upper horizontal surface (50-1), wherein

    the upper horizontal (50-1) and lower arcuate surfaces (50-2) extending between the opposed pair of substantially vertically oriented end blocks (52, 54), and wherein

    the lower arcuate surface (50-2) has an apex substantially at a latitudinal midplane of the central bridge region (56), and wherein

    the central bridge region (56) is at least latitudinally segmented along a pair of opposite downwardly converging latitudinal planes to form a central keystone refractory bridge component and adjacent pairs of refractory bridge components that are bonded to one another by the bonding agent.


     
    2. The refractory component as in claim 1, wherein the central bridge region (56) comprises:

    opposed parallel vertically planar opposed pairs of end web sections (56-1a, 56-1b, 56-2a, 56-2b) defining therebetween a respective pair of vertically planar lateral channels (58-1, 58-2), and

    a central web section defining therebetween a vertically planar central channel (58-3) positioned between the lateral channels, and

    a pair of downwardly and inwardly convergent latitudinal rib elements (60-1, 60-2) separating the lateral channels (58-1, 58-2) from the central channel (58-3).


     
    3. The refractory component as in claim 2, wherein the refractory rider arch (50) is latitudinally split along the rib elements (60-1, 60-2) to establish the respective multiple refractory components bonded to one another.
     
    4. The refractory component as in claim 1, wherein the bonding agent is an epoxy adhesive.
     


    Ansprüche

    1. Segmentierter feuerfester Gewölbebogen (50), der mehrere feuerfeste Bauteile umfasst, die durch ein Bindemittel miteinander verbunden sind, wobei der feuerfeste Gewölbebogen (50) ferner Folgendes umfasst:

    ein gegenüberliegendes Paar von im Wesentlichen vertikal ausgerichteten Endblöcken (52, 54),

    einen mittigen Brückenbereich (56), der eine obere horizontale Fläche (50-1) und eine untere bogenförmige Fläche (50-2) gegenüber der oberen horizontalen Fläche (50-1) aufweist, wobei

    sich die obere horizontale (50-1) und die untere bogenförmige Fläche (50-2) zwischen dem gegenüberliegenden Paar von im Wesentlichen vertikal ausgerichteten Endblöcken (52, 54) erstrecken und wobei

    die untere bogenförmige Fläche (50-2) einen Scheitel im Wesentlichen an einer Breitenmittelebene des mittigen Brückenbereichs (56) aufweist und wobei

    der mittige Brückenbereich (56) mindestens in Breitenrichtung entlang eines Paares von gegenüberliegenden nach unten zusammenlaufenden Breitenebenen segmentiert ist, um ein mittiges feuerfestes Schlussstein-Brückenbauteil und benachbarte Paare von feuerfesten Brückenbauteilen, die durch das Bindemittel miteinander verbunden sind, zu bilden.


     
    2. Feuerfestes Bauteil nach Anspruch 1, wobei der mittige Brückenbereich (56) Folgendes umfasst:

    gegenüberliegende parallele in Vertikalrichtung ebene gegenüberliegende Paare von Endstegsektionen (56-1a, 56-1b, 56-2a, 56-2b), die zwischen denselben ein jeweiliges Paar von in Vertikalrichtung ebenen seitlichen Kanälen (58-1, 58-2) bilden, und

    eine mittige Stegsektion, die zwischen derselben einen in Vertikalrichtung ebenen mittigen Kanal (58-3) definiert, der zwischen den seitlichen Kanälen angeordnet ist, und

    ein Paar von nach unten und nach innen zusammenlaufenden Breitenrippenelementen (60-1, 60-2), welche die seitlichen Kanäle (58-1, 58-2) von dem mittigen Kanal (58-3) trennen.


     
    3. Feuerfestes Bauteil nach Anspruch 2, wobei der feuerfeste Gewölbebogen (50) in Breitenrichtung entlang der Rippenelemente (60-1, 60-2) gespalten ist, um die jeweiligen mehreren feuerfesten Bauteile herzustellen, die miteinander verbunden sind.
     
    4. Feuerfestes Bauteil nach Anspruch 1, wobei das Bindemittel ein Epoxidklebstoff ist.
     


    Revendications

    1. Arche réfractaire segmentée (50) comprenant de multiples composants réfractaires reliés les uns aux autres par un agent de liaison, l'arche réfractaire (50) comprenant en outre :

    une paire opposée de blocs d'extrémité à orientation sensiblement verticale (52, 54);

    une région de pont centrale (56) comportant une surface horizontale supérieure (50-1) et une surface arquée inférieure (50-2) opposée à la surface horizontale supérieure (50-1), dans laquelle

    les surfaces supérieure horizontale (50-1) et inférieure arquée (50-2) s'étendent entre la paire opposée de blocs d'extrémité à orientation sensiblement verticale (52, 54), et dans laquelle

    la surface inférieure arquée (50-2) comporte un sommet située sensiblement au niveau d'un plan médian latitudinal de la région de pont centrale (56), et dans laquelle :
    la région de pont centrale (56) est au moins segmentée latitudinalement le long d'une paire de plans latitudinaux opposés convergeant vers le bas pour former un composant de pont réfractaire clé et des paires adjacentes de composants de pont réfractaires reliés les uns aux autres par l'agent de liaison.


     
    2. Composant réfractaire selon la revendication 1, dans lequel la région de pont centrale (56) comprend :

    des paires opposées planes verticalement parallèles opposées de sections de bande d'extrémité (56-1a, 56-1b, 56-2a, 56-2b) définissant entre elles une paire respective de canaux latéraux verticalement plans (58-1, 58-2) ; et

    une section de bande centrale définissant un canal central verticalement plan (58-3) positionné entre les canaux latéraux ; et

    une paire d'éléments de nervure latitudinaux convergeant vers le bas et vers l'intérieur (60-1, 60-2) séparant les canaux latéraux (58-1, 58-2) du canal central (58-3).


     
    3. Composant réfractaire selon la revendication 2, dans lequel l'arche réfractaire (50) est divisée latitudinalement le long des éléments de nervure (60-1, 60-2) pour établir les multiples composants réfractaires reliés les uns aux autres.
     
    4. Composant réfractaire selon la revendication 1, dans lequel l'agent de liaison est un adhésif époxyde.
     




    Drawing

















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description