Composite refractory insulating tile and Method of fabrication

专利摘要:
The present invention relates to a synthetic refractory insulating tile, and an object thereof is to provide a pair of synthetic refractory tiles for insulating a fluid cooled structural member of a metallurgical furnace in the form of reheating metal slabs and slabs. The refractory tile is a composite of cast refractory sheath extending inwardly and radially from the outer surface of the selected portion of the tile to the inner surface in contact with the furnace member. At the portion of the refractory tile that is not in contact with the furnace member, the ceramic fiber insulation blanket fills the hollow portion between the cast fireproof jacket and the furnace member. The inclusion of ceramic fiber insulation blankets on each tile reduces the heat loss to the furnace compared to solid cast refractory tiles of similar thickness. The attachment assembly in contact with the fluid cooling structural member has a plurality of anchoring wires extending into the cast refractory shell and spaced apart from each other, to maintain proper alignment with the structural members of the furnace of each tile. The plurality of anchoring wires extend only into the part of the cast refractory shell in which the cast refractory is firmly stretched from the outer surface of the tile to the inner surface in contact with the furnace member.
公开号:KR20040016367A
申请号:KR1020020085062
申请日:2002-12-27
公开日:2004-02-21
发明作者:스위 뉴엔 캐롤；엔. 뉴엔 넉
申请人:스위 뉴엔 캐롤；엔. 뉴엔 넉；
IPC主号:

专利说明:

Composite refractory insulating tile and method of fabrication
[34] The present invention relates to metallurgical furnaces used to reheat metal prior to hot operation, wherein the water cooled furnace member is refractory to insulate the water-cooled furnace member and to protect it from hot furnace gas. To a coated metallurgical furnace.
[35] Furnaces that heat metals during hot operation are generally operated at temperatures below about 2400 ° F. At such high temperatures, it is necessary to protect the structural members constituting the furnace from the agglomerated heat. The furnace member, which provides support for heavy metal parts such as slabs or slabs heated in the furnace, is insulated and its interior can be cooled by a circulating fluid to maintain the strength required to support the weight of the heavy metal parts.
[36] The furnace support member for the heavy metal part is also commonly referred to as a 'skid rail' and consists of horizontally oriented water cooled tubes with a wear surface protruding in the longitudinal direction. The portion of the heavy metal to be heated moves along the wear surface of the support member as it moves from the furnace inlet to the furnace outlet. The insulator for the support member usually consists of a single refractory material or consists of concentric layers of different materials, called fireproof tiles. Several different means are used to ensure that the refractory tiles for the furnace members withstand high temperatures, thermal shocks, vibrations, and other external forces applied to the furnace members and the refractory tiles. It is important that the installation be relatively easy, as the refractory tiles must be replaced periodically.
[37] U. S. Patent No. 4,424, 027 discloses a refractory tile in which an access hole is provided for use in welding an insertion passage to a fluid cooled furnace member using a MIG welder.
[38] In addition, US Pat. No. 3,881,864 discloses a fire resistant tile covering an internal fiber refractory material around a low skid rail, in which two c-type blocks are fastened together under a skid rail to ensure adequate insulation.
[39] U. S. Patent No. 4,393, 569 also discloses a module in which the support member is wrapped in a refractory fiber insulating material protected by an external refractory ceramic fiber blanket overlapping at least two layers.
[40] U. S. Patent No. 4,140, 484 also discloses a tubular support member covered by a fire resistant cladding comprising an inner layer of a fiber refractory material and a fire resistant tile outer layer, wherein the outer layer is disposed in place by metal links secured together around the support member.
[41] U. S. Patent No. 4,071, 311 also discloses a tubular metal support member covered by an inner layer of a refractory fiber material and an outer layer consisting of a semi-cylindrical refractory tile. The refractory tiles are disposed in place by metal coupling links which are covered and fastened by neighboring tiles.
[42] U.S. Patent No. 4,015,636 also discloses a three layer insulating assembly consisting of an inner fibrous thermal conductor, an intermediate split ceramic refractory, and an outer protective ceramic coating.
[43] In addition, US Pat. No. 4,450,872 discloses a coating comprising a thermally insulating ceramic refractory fiber blanket inner layer, an open woven ceramic cloth around the blanket, a veneering mortar inner layer, a compression ring made of ceramic fiber material, and a thermal face layer of veneering coating. do.
[44] U. S. Patent No. 3,881, 864 also discloses a refractory tile covering a furnace member, preferably an inner layer of fibrous refractory material, wherein the c-type tiles are fastened to each other under the member and disposed appropriately.
[45] In improving the refractory tiles with insulators of concentric layers of different materials, US Pat. No. 6,179,610 is directed at selected portions of tiles located near the ends of individual tiles and individual attachment means from the furnace member where the cast refractory material will be insulated. A synthetic refractory tile for a metallurgical furnace member having a layered refractory material extending to the outer surface of the refractory tile is disclosed. The synthetic refractory tile of US Pat. No. 6,179,610 is shown in FIG. 13, which is a cross sectional view taken perpendicular to the longitudinal direction of the tile. The cross section takes a part of a tile provided with attachment means. 14 shows a cross-sectional view of a plane including the longitudinal axis 108 of the synthetic refractory tile. In Figs. 13 and 14, the water-cooled member 101 is insulated by the synthetic refractory tile portion 102 made up of the cast refractory portion 103 and the insulating ceramic fiber blanket portion 104. Figs. In the portion wrapped around the metal attachment means 105, the cast refractory material extends continuously from the fluid cooled furnace member 101 to the outer surface 106 of the tile. Each metal attachment means 105 can be used as long as it is a rigid metal connection means. The attachment means is welded to the fluid cooled furnace member 101 through an access hole using a MIG-welder.
[46] In the synthetic refractory tiles of US Pat. No. 6,179,610, the excellent insulating properties of the ceramic fiber blanket 104 are used in all parts of the tile where the good strength of the cast refractory 103 is not needed. The cast refractory body 103 is an anchoring wire 109 which is part of the attachment means 105 which relies on centering the tile in the cooling furnace member 101 and placing the tile 102 in place of the furnace member 101. Rely on providing a location to insert it. As a preferable insulation method, there is a method of welding the welding base material 110 of the attachment means 105 to the furnace member 101. The anchoring wire 109 is attached to the welding base material 110 through the flat washer 111.
[47] As shown in FIG. 13, the anchoring wire 109 extends radially from the furnace member 101 and in the longitudinal direction of the furnace member in the cast refractory material. 14, another anchoring wire 109 extends radially from the furnace member 101 and perpendicular to the longitudinal direction of the furnace member in the cast refractory material.
[48] 13 and 14, the ends of the anchoring wires 109 are disposed in a cast fireproof section with ceramic fiber blankets 104 which are better insulators disposed radially and inwardly. The end of the anchoring wire 109 disposed in this position is in contact with the furnace member 101 radially and inwardly from the outer surface 106 of the tile 102, such as 113 and 114 of FIGS. 13 and 14. This means that the end is exposed to a higher temperature than the anchoring wire portion in the cast refractory material portion extending to the inner surface of the tile. The exposure of the anchoring wire to high temperatures, and the difference in temperature along the length of the anchoring wire, reduce the life of the synthetic refractory tile.
[49] It is an object of the present invention to provide a synthetic refractory tile in which the temperature of the anchoring wire is reduced (compared to the anchoring wire of the conventional tile installed in the furnace operating at the same temperature as the furnace of the present invention), and according to the length of the anchoring wire To reduce the temperature difference.
[50] The present invention provides a pair of synthetic refractory tiles that insulate a fluid cooling structural member of a metallurgical furnace. Each tile includes a rigid cast fireproof jacket disposed around a portion of the fluid cooled furnace member, the rigid cast fireproof jacket having an inner surface and an outer surface opposite the inner surface, in the longitudinal direction of the stretched fluid cooled furnace member. Corresponding end walls facing each other, and two end walls extending between the end walls. The inner surface includes a selected portion in contact with the fluid cooled furnace member, and the remaining portion spaced radially apart from the fluid cooled furnace member, thereby defining the hollow portion. The ceramic fiber blanket is located in the hollow part and the material of the ceramic fiber blanket has a higher insulation k value than the material of the cast fireproof jacket. At least one attachment means is located within a selected portion of the rigid cast fireproof jacket, each attachment means having a temperature lower than the temperature of the portion spaced radially apart from the fluid cooled furnace member in the use of the synthetic refractory tile. And a portion of the cast fireproof jacket having the ceramic fiber blanket located in the hollow portion.
[1] 1 is a perspective view showing a general arrangement of water cooling support members in a metallurgical reheat furnace;
[2] 2 is a perspective view of a pair of synthetic refractory insulating tiles according to the present invention;
[3] 3 is a longitudinal sectional view of a pair of synthetic fire resistant insulating tiles according to the present invention, showing a plane taken along the line III-III of FIG. 2 in the direction of the arrow;
[4] 4 is a cross sectional view of a pair of synthetic refractory insulating tiles according to the present invention, showing a plane taken along the IV-IV line of FIG. 2 in the direction of the arrow;
[5] FIG. 5 is a cross sectional view of a pair of synthetic refractory insulating tiles in accordance with the present invention, showing a plane passing through the attachment assembly taken along the V-V line of FIG. 2 in the direction of the arrow; FIG.
[6] FIG. 6 is a cross sectional view of a pair of synthetic refractory insulating tiles in accordance with the present invention, showing a face near the longitudinal end of the tile taken along the VI-VI line of FIG. 2 in the direction of the arrow; FIG.
[7] FIG. 7 is a longitudinal sectional view of a pair of synthetic refractory insulating tiles according to the present invention, showing a face taken in the direction of the arrow along the III-III line of FIG. 2, showing a second embodiment of an attachment assembly; FIG.
[8] FIG. 8 is a cross-sectional view of a pair of synthetic refractory insulating tiles according to the present invention, showing a plane passing through the attachment assembly taken in the direction of the arrow along the V-V line of FIG. 2, showing a second embodiment of the attachment assembly; FIG.
[9] FIG. 9 is a cross sectional view of a pair of synthetic refractory insulating tiles in accordance with one embodiment of the present invention, used with a fluid cooled furnace member having a skid rail protruding from an upper surface, showing a surface passing through an attachment assembly. FIG. do;
[10] 10 is a cross sectional view of a pair of synthetic refractory insulating tiles in accordance with the present invention, used with fluid cooled furnace members arranged parallel and adjacent to each other, showing a surface passing through an attachment assembly;
[11] FIG. 11 is a cross sectional view of a pair of synthetic refractory insulating tiles according to the present invention for use with fluid-cooled furnace members arranged parallel and adjacent to each other, with the face passing through the attachment assembly according to the second embodiment. Shows;
[12] 12A-12F are top and end views of various attachment assemblies used to attach the composite refractory insulating tiles of the present invention in a non-welded manner;
[13] FIG. 13 is a cross sectional view of a conventional synthetic refractory insulating tile, showing a surface passing through an attachment; FIG. And
[14] Fig. 14 is a longitudinal sectional view of a conventional synthetic refractory insulating tile, showing a plane including a length axis.
[15] <Description of the symbols for the main parts of the drawings>
[16] (1) Furnace (2) Fireproof floor
[17] (3): fireproof walls (4), (5), (75): skid rail
[18] (6), (7), (14-19), (24), (53), (62), (63), (101)
[19] (8 ~ 13), (20 ~ 23) (52), (66), (76), (102): Tile
[20] 25, 26: C-type tiles 27, 28, 80: cavity
[21] (29), (64), (65), (108): Axis
[22] (30), (55), (70), (77), (103): fireproof jacket
[23] (31), (32), (45), (46): end wall
[24] 33 to 36, 67, 68, 78: Assembly
[25] (37): hollow part 38, 104: blanket
[26] 39, 58, 81: band 40, 59: welding plate
[27] 41, 51, 74, 82, 109: anchoring wire
[28] (44), (71), (79), (106): outer surface
[29] (47): gaps 48, 56, 57: end walls
[30] (49), (110): Welding base material (50), (111): Washer
[31] (54): wear surface (61): end
[32] (83): hole (84): slot
[33] 105: metal attachment means
[51] FIG. 1 shows a part of a metallurgical furnace 1 used to reheat heavy metals such as slabs or slabs prior to heating operations such as hot rolling. This type of furnace is operated at temperatures below about 2400 ° F. and it is necessary to cool the structural members affected by the furnace gas. The present invention describes the use of structural members in furnaces having mostly internal water-cooled cylindrical pipes, but does not preclude the use of fluid cooled furnace members having other cross-sectional shapes.
[52] In the furnace 1, the fireproof floor 2 and the wall 3 form part of a furnace fence that holds hot furnace gas. The heavy metal portion to be heated moves along the solid metal skidrails 4 and 5 protruding from the horizontally oriented fluid cooled furnace members 6 and 7, and by means of a pair of synthetic refractory insulating tiles according to the invention Insulated from gas. The tiles 8, 9, and 10 enclose the fluid cooled furnace member 6, and the tiles 11, 12, and 13 cover the fluid cooled furnace member 7. Fluid-cooled furnace members 6 and 7 with skid rails are supported by horizontally oriented fluid-cooled furnace members 14 and 15 without skid rails, and are fluid-cooled furnace members. 14 and 15 are alternately supported by vertically oriented fluid cooled furnace members 16, 17, 18, and 19. The synthetic refractory insulating tile also encloses a support member which is not provided with a skid rail, for example, the tile 20 encloses the member 15 and the tile 21 encloses the member 14. Vertically oriented members 16, 17, 18, and 19 are also encased in tiles, for example member 16 is covered with tiles 22. All of the above fluid cooled furnace members are cooled by water or other fluid flowing therein, which maintains the temperature of the furnace members so that they can structurally support the heavy metal parts that are heated and move along the skidrails 4 and 5. To do that. For example, a "walking beam furnace" may have two fluid cooled furnace members (not shown) arranged in parallel adjacent to each other, the furnace member being one tile with openings. Can be protected. The synthetic refractory insulating tiles of the present invention can significantly reduce the heat lost to the circulating refrigerant from the furnace, and provide a protective jacket to protect the rough environment of the furnace such as debris and debris on the surface of the furnace gas and / or slag and the heavy metal portion to be heated. Tolerate
[53] 2 is a perspective view of a pair of stretched synthetic refractory insulating tiles according to the present invention. A pair of tiles of two C-shaped cross sections are assembled one after another along the fluid cooled furnace member shown in FIG. A gasket (not shown) is provided between the longitudinal ends of adjacent tiles to seal between the tiles and allow for thermal expansion and thermal contraction.
[54] Referring to FIG. 2, a pair of insulating tiles 23 is located around the fluid cooled furnace member 24. The tile 23 consists of two paired C-shaped tiles 25 and 26 to facilitate insulation. Cavities 27 and 28 extending radially from the outer surface of the tile toward the fluid cooled furnace member 24 provide access for welding the attachment assembly inserted into the tile to the metal fluid cooled furnace member during tile installation. Provide (access). The cavity is filled with refractory mortar after the installation of the tiles is completed. In a preferred embodiment, access to the attachment assembly is configured to enable the MIG-welder described in US Pat. No. 4,424,027, which is incorporated herein by reference and has the same assignee. The position and number of attachment assemblies can vary and depend on the installation dimensions of the tiles. In Fig. 2, only the outer surface of the tile is clearly shown. Cross-sections of the tiles taken in the direction of the arrows along the III-III, IV-IV, V-V, and VI-VI lines of FIG. 2 show the interior details of the tiles in FIGS. 3 to 8.
[55] 3 is a longitudinal cross-sectional view of a pair of synthetic refractory insulating tiles in accordance with the present invention, showing a plane comprising a longitudinal axis 29 taken in the direction of the arrow along line III-III of FIG. The face passes through the attachment assembly in combination with the cavities 27 and 28 and divides the pair of tiles in half in the longitudinal direction. Also shown are attachment assemblies positioned in cavities 27 and 28 and located in 27a and 28a.
[56] Each tile has a rigid cast fireproof jacket 30 disposed around the fluid cooled furnace member 24. According to a preferred embodiment of the present invention, the rigid cast fireproof jacket 30 is in contact with a furnace member 24 located near each longitudinal end wall 31 and 32 of the jacket, and each attachment assembly 33, 34, 35, and 36). The inner surface of the cast fireproof jacket 30 limits the hollow portion 37 filled with the ceramic fiber insulation blanket 38. The portion of the blanket 38 not in contact with the cast fireproof jacket 30 is in contact with the furnace member 24.
[57] In a preferred embodiment, the fiber blanket 38 is made of Thermal Ceramics Co. It is an alumina-silica ceramic fiber blanket sold by CERABLANKET. Shell 30 is Sil-Base Co. It is a cast refractory material such as alumina-silica sold by Inc. as "MIX 200". The ceramic fiber blanket 38 has a higher insulation value (k value) than the cast refractory material, and thus the synthetic tiles of the present invention are better insulators than tiles of similar thickness made only of the cast refractory material. It is forbidden to use only the fiber blanket 38 with good insulating properties because of the adverse effect on the blanket caused by the harsh environment in the furnace as described above. The cast fireproof jacket 30 protects the better insulating ceramic fiber blanket 38 located radially inside the cast fireproof jacket.
[58] Synthetic tiles of a concentric layered structure are disclosed in US Pat. No. 6,179,610, having the same assignee as the applicant and incorporated herein by reference.
[59] FIG. 4 is a cross-sectional view of a pair of synthetic refractory insulating tiles according to the invention, showing a plane perpendicular to the longitudinal axis 29 taken in the direction of the arrow along the IV-IV line of FIG. 2. Some of the tiles shown in FIG. 4 are spaced apart at regular intervals in the longitudinal direction from the end walls 31 and 32 (FIG. 3) and also from the attachment assemblies 33 to 36 that have attached the tile to the furnace member 24. Instruct part of the tile. Referring to FIG. 4, the tile consists of an insulated ceramic fiber blanket 38 covering and covering the fluid cooled furnace member 24, and a cast fireproof jacket 30 covering the insulated ceramic fiber blanket 38. The tile shown in FIG. 4 is similar to a conventional tile known in the art, with the layer structure extending evenly from one end to the other end of the tile. However, the synthetic tiles of the present invention differ from conventional tiles in terms of attachment assembly regions and respective longitudinal end regions, which will be discussed in more detail below.
[60] 5 shows the structure of adjacent regions of each attachment assembly, such as the assemblies 33 to 36 of tiles. The transverse line V-V shown in FIG. 2 defines the sides passing through the cavities 27 and 28 perpendicular to the longitudinal axis 29 shown in FIG. 3 and facing each other and the attachment assembly associated with the cavity. Since the two parts are similar, only the part associated with the cavity 27 is shown in FIG. 5. Referring to FIG. 5, the attachment assemblies 33 and 35 are inserted into the cast fireproof shell 30 and arranged to contact the fluid cooled furnace member 24 when the tiles are installed in the furnace member 24. In each attachment assembly region and circumferentially from each attachment assembly, the cast fireproof shell 30 extends inwardly and radially as a protrusion of the fireproof shell to contact the furnace member 24. In the portion of the tile removed longitudinally from the area of the attachment assembly, as shown in the area between the attachment assemblies of FIG. 3, the cast fireproof shell has only a protective jacket and has a cast fireproof jacket 30 and a fluid cooling furnace member 24. The hollow portion 37 in between is filled with the ceramic fiber blanket 38 shown in FIG. The structure of FIG. 5 in which the attachment assembly is in contact with the pipe and inserted into the cast refractory body not only secures the attachment assembly but also a solid radial alignment mechanism that radially aligns the synthetic tile with the fluid cooled furnace member 24. To provide. The alignment pattern contrasts with conventional synthetic insulating tiles with insulating fiber blankets that do not conform to the solid alignment mechanism.
[61] In a preferred embodiment of the invention, the attachment assembly is a band 39 (FIGS. 3 and 5), a weld plate 40 and a plurality of anchoring wires 41. The band 39, the weld plate 40, and the anchoring wire 41 are preferably made of stainless steel. Preferably the band 39 is a 1/8 inch thick material having a width of about 1 inch. The weld plate 40 is about 1/4 inch thick and generally has a square shape. The anchoring wire 41 has a diameter of about 3/16 inches. The elements of each attachment means are welded before casting into the fireproof jacket 30 of the synthetic tile. The cavities 27 and 28, and the opposing cavities 27a and 28a, provide access for welding the respective attachment assemblies 33 to 36 to the member 24 with a cooling fluid upon installation of the tile. Welding is preferably performed using a mig-welder when installing the tile to the furnace member 24. The band 39 and the welding plate 40 are preferably formed in an arch shape so as to be in close contact with the furnace member 24. Each band and weld plate each have holes 39a and 40a, preferably having a diameter of about 1/2 inch. The holes are aligned with one another in the radial direction of the furnace member when the attachment assembly is manufactured. The holes facilitate welding the attachment assembly to the furnace member. After the welding operation, the cavities 27, 27a, 28, and 28a are filled with refractory insulating material. Modifications of the attachment means are possible in practicing the invention and will be described below. The position and number of attachment assemblies depend on the length of the synthetic tile as well as other variables.
[62] An important feature of the present invention is the location of the anchoring wire 41 relative to the cast refractory material 30 and the ceramic fiber blanket 38. In order to provide more durable tiles and more rigid attachment to the furnace member, it is important that the anchoring wire 41 is exposed to as low a temperature as possible, and that the temperature difference along the length of the anchoring wire is as small as possible. These objects can be achieved by making the shape and structure of the anchoring wire such that the wire does not extend to the cast refractory portion with the ceramic fiber blanket.
[63] Referring to FIG. 3, the anchoring wire 41 is not formed or positioned to extend to a portion of the cast refractory material 30 with the ceramic fiber blanket 38 extending radially and inward from the cast refractory material 30. It can be seen. 5 from another angle shows that the anchoring wire 41 is inserted into the cast refractory material 30 at the portion where the cast refractory material 30 extends from the furnace member 24 to its outer surface 44. . Some of the cast refractory material in which the anchoring wire 41 is located does not have a ceramic blanket material between the anchoring wire and the furnace member 24. Since the cast refractory material 30 does not further insulate the ceramic blanket material 38, the temperature at the end of the anchoring wire 41 is retained when the ceramic insulation blanket layer is located between the end and the furnace member 24. It will have a temperature lower than the temperature.
[64] Figure 6 shows a cross sectional structure of a portion near the longitudinal end of a synthetic tile. The near end portion shows a cross section taken along the line VI-VI perpendicular to the longitudinal axis 29 in FIG. 2. Referring to the tile 23 of FIG. 6, the cast fireproof jacket 30 extends continuously and inward radially from its outer surface 44 to contact the fluid cooled furnace member 24. Each cast fireproof jacket end shown is preferably in the direction of the longitudinal axis 29 by a distance of about 1/4 to 3/4 inch inward from the end walls 45 and 46 best shown in FIG. 3. Stretched The structure of the cast refractory body described above is implemented at both ends of each tile to ensure proper radial alignment of the tile with respect to the longitudinal axis of the fluid cooled furnace member 24. End alignment characteristics are further provided near each attachment assembly described above with reference to FIG. 5.
[65] Preferred embodiments of the synthetic tiles of the present invention are about 12 inches or more in length, but tiles smaller than that may be used. For example, in a 12 inch long tile, the major portion of the tile has a ceramic fiber blanket 38 in contact with the cooling fluid furnace member 24 and about 10-30% in contact with the cooling fluid furnace member 24. The synthetic tile of is cast fireproof jacket (30). The higher proportion of ceramic fiber blanket 38 in contact with the furnace member has the superior insulating properties of the ceramic fiber blanket, and relies on the stiffness and strength properties of the cast fireproof jacket 30 to firmly attach the attachment assembly upon installation of the tile. It provides a rigid radially aligned surface that is enclosed and in contact with the fluid cooled furnace member 24.
[66] When installing the tiles, a small gap 47 of about 1/4 inch or less between the tiles of the "C" shape is required to ensure attachment assemblies 33 to 36 in contact with the fluid cooled furnace member 24. Forming (FIGS. 2, 4, 5, and 6). The gap is filled with refractory mortar or fiber insulation after tile installation, or more flexible gasket material is used during tile installation. According to the embodiment of the invention shown in FIGS. 2 to 6, the gap 47 is defined by an end wall 48 extending longitudinally between the end walls 45 and 46 (FIG. 3). In a preferred embodiment, the end wall of one pair of tiles of the pair of tiles is connected to the end wall of the other pair of tiles. Preferably the end walls are planar in shape.
[67] 7 and 8 show a second embodiment of the attachment assembly of the present invention. Each attachment assembly consists of a welding substrate 49, washer 50, and a plurality of anchoring wires 51. In a preferred embodiment of the attachment assembly, the components are made of stainless steel. As in the first embodiment, the attachment assembly allows the refractory tile 52 to be firmly attached to the furnace member 24. When the tile is installed, as access to the attachment assembly, the access cavities 27 and 27a are passed through to weld the welding base material 49 to the furnace member 24. As in the first embodiment, the anchoring wire 51 inserted into the cast refractory material does not extend to the refractory material portion in which the ceramic fiber blanket 38 is disposed between the cast refractory material portion and the furnace member 24. According to the first embodiment, the arrangement lowers the temperature of the anchoring wire as described above. As shown in FIG. 8, the shape of the anchoring wire is “L” -shaped, or in some form as long as the wire does not extend to the cast refractory material portion where the ceramic fiber blanket is disposed between the cast refractory material portion and the furnace member. It does not matter.
[68] FIG. 9 is a cross sectional view of a face through an attachment means of a pair of synthetic refractory insulating tiles in accordance with one embodiment of the present invention for use with a fluid cooled furnace member having a skid rail protruding from an upper surface. The embodiment of FIG. 9 is used in an application corresponding to the members 6 and 7 shown in FIG. 1. The embodiment disclosed in Figs. 2 to 6 is used for the water-cooled member of Fig. 1 (14 to 19) and the like.
[69] The embodiment of FIG. 9 shows a cross section of an adjacent region of the attachment assembly, in which the cast fireproof jacket 55 extends radially inwardly like a protrusion to contact the fluid cooled furnace member 53. The synthetic tile portion (not shown) removed longitudinally from the portion with the attachment assembly has a structure similar to that shown in FIGS. 4 and 6, ie the cast refractory body is fluid cooled furnace member at the longitudinal end of each tile. 53, the fiber blanket is in contact with the fluid cooled furnace member 53 in the remainder of each tile. In the embodiment of FIG. 9, the end walls 56 of each tile are shaved to avoid contact with the steel slab, and for each pair of tiles the remaining end wall 57 is the remaining end wall of the remaining pair of tiles ( 57). As in the embodiment of the furnace member shown in FIGS. 2 to 6, the attachment assembly of this embodiment is a band 58 in contact with the furnace member 53, the welding plate 59, and the anchor wire inserted into the cast fireproof jacket 55. )
[70] In addition to welding the attachment assembly to the furnace member 53 using the welding plate 59, the band 58 is welded with the furnace member at an end 61 extending beyond the cast refractory material 55.
[71] Although the attachment assembly shown in FIG. 9 uses a band, the attachment assembly shown in FIGS. 7 and 8 is used with a refractory tile for use with a furnace member having a skid-rail wear surface 54. Also, as in the previous embodiment, the anchoring wire does not extend to the cast refractory material portion with the ceramic insulating blanket positioned radially inward.
[72] In all of the above embodiments, the thickness of the radially extending insulating fiber blanket is preferably in the range between about 1/2 and 2 inches, and the thickness of the radially extending cast fireproof jacket, i.e. fluid cooled furnace The thickness of the portion that does not extend radially inward to contact the member is also preferably in the range between about 1/2 and 2 inches.
[73] Each synthetic refractory tile is preferably produced by primary casting a cast refractory body in a mold having a casting cavity comprising a suitable mold outer wall and an opposite mold inner wall suitable for the shape of the fluid cooled furnace member on which the tile is installed. The inner wall of the mold includes an insert or riser corresponding in shape to the hollow part of the cast refractory body in which the fiber blanket is located and opposite the casting cavity. The attachment assembly of each tile is appropriately temporarily placed in the mold until it is firmly inserted into the cast refractory body. After the refractory body is cast and at least partially cured, the cast refractory shell is removed from the mold and final curing is performed. In the final step, the ceramic fiber blanket of a certain thickness is cut to fit the hollow portion produced during casting by the mold insert or the riser included in the inner wall of the mold.
[74] A second method for producing a synthetic refractory tile comprises the steps of cutting the fiber blanket into a suitable form; Applying the fiber blanket to the inner wall mold in accordance with the shape of the fluid cooled furnace member on which the resulting fiber blanket is installed; Providing a mold outer wall at a suitable location to form a casting cavity; And casting the cast refractory body.
[75] In some furnaces using the synthetic refractory tile of the present invention, the furnace has two fluid cooled furnace members in which the two members are closely connected and the longitudinal axes of the fluid cooled furnace members are parallel to each other. Referring to FIG. 10, fluid cooled furnace members 62 and 63 with longitudinal axes 64 and 65 are arranged in parallel. A pair of synthetic refractory tiles 66 is shown as a cross sectional view of the face taken perpendicular to the longitudinal axes 64 and 65 of the portion through the attachment assemblies 67 and 68. In the portion of the tile that is removed longitudinally from the attachment assembly, the cast fireproof shell has only a protective jacket 70, and the hollow portion between the cast fireproof jacket 70 and the fluid cooled furnace members 62 and 63 relates to FIG. It is then filled with the ceramic fiber blanket. At the end of each tile, the cast refractory shell 70 extends from the outer surface 71 to the fluid cooled furnace members 62 and 63 as in the arrangement of the furnace members shown in FIG. 6. As in the embodiment for the above arrangement, this embodiment includes an attachment assembly comprising a furnace member 53, a welding plate 59, and a band 58 in close contact with the anchor wire inserted into the cast fireproof jacket 55. It includes. According to another embodiment, the anchoring wire 74 does not extend to the cast refractory material portion in which the ceramic fiber blanket extends inwardly radially. At this time, the top fluid cooling furnace member 62 may include a skid rail (75).
[76] FIG. 11 shows the fluid cooled furnace member arrangement described in connection with FIG. 10 and shows an attachment assembly having a weld substrate 49, washer 50, and anchoring wire 51. In the embodiment of FIG. 11, the composite refractory tile 76 is an attachment assembly 78 extending radially inwardly from the tile surface 79 to the furnace members 62 and 63 and the cast refractory 77 which is part of the adjacent tile. Has In order to attach the tile to the furnace members 62 and 63, the welding parent material 49 is welded to the furnace member through the access cavity hole 80. As in the above embodiment, the anchoring wire 51 does not extend as part of the cast refractory material in which the ceramic fiber blanket is present inwardly and radially.
[77] 12A-12F illustrate various structures of the attachment assembly with bands, showing top and end views of the bands. The attachment assembly shown in FIGS. 12A-12F is intended to be used in attaching a composite refractory insulation tile to a fluid cooled furnace member using a non-welded manner, ie using bolts and nuts or other fastening means. In each figure, the band is referred to by reference numeral 81, and the anchoring wire fixed to the band is referred to by reference numeral 82. The band having a portion in contact with the fluid cooled furnace member has a radially outwardly extending portion for continuous assembly with a comparison of similar bands inserted into the other pair of tiles of the pair of tiles. Two types of openings are provided as holes 83 and slots 84. The use of slots allows the use of bolts that are already partially screwed with the nut. An anchoring wire of a different type than the form of the anchoring wire shown in FIGS. 12A to 12F may also be used. The welding plate is not provided as part of the attachment assembly because of the use of a non-welding attachment assembly.
[78] The specific materials, dimensional data, and manufacturing steps presented herein are intended to illustrate embodiments of the invention, and various modifications may be made in light of the above teachings without departing from the applicant's novel invention. Accordingly, the scope of the invention is defined by the appended claims.

权利要求:
Claims (26)
[1" claim-type="Currently amended] A pair of synthetic refractory tiles used to insulate stretch fluid-cooled furnace members in metallurgical furnaces, each tile being
A rigid cast fireproof jacket disposed around a portion of the fluid cooled furnace member;
An inner surface comprising a selected portion in contact with the fluid cooled furnace member and a remaining portion spaced radially apart from the fluid cooled furnace member, thereby defining the hollow portion;
A ceramic fiber blanket located in the hollow portion; And
At least one attachment means located within the selected portion of the rigid cast fireproof jacket,
The rigid cast fireproof jacket includes an inner surface and an outer surface facing the inner surface, opposite end walls corresponding to the longitudinal direction of the stretched fluid cooled furnace member, and two end walls extending between the end walls. And wherein the material of the ceramic fiber blanket has a higher insulation k value than the material of the cast fireproof jacket, and wherein each of the attachment means is spaced radially away from the fluid cooled furnace member when using the synthetic fireproof tile. And a pair of synthetic refractory tiles having a temperature lower than the temperature and being positioned within a portion of said cast fireproof jacket having said ceramic fiber blanket positioned within said confined hollow portion.
[2" claim-type="Currently amended] The method of claim 1,
Wherein said attachment means comprises at least one attachment assembly located in at least one said selected portion of said rigid cast fireproof jacket in contact with a fluid cooled furnace member,
A plurality of anchorings extending only in the rigid cast fireproof jacket portion radially extending inwardly from the outer surface to the contact portion in contact with the fluid cooled furnace member and the inner surface in contact with the fluid cooled furnace member. A pair of synthetic fire resistant tiles comprising a wire.
[3" claim-type="Currently amended] The method of claim 2,
Wherein the selected portions of the rigid cast refractory jacket in contact with the stretched fluid cooled furnace member each comprise one end wall of the cast refractory jacket.
[4" claim-type="Currently amended] The method of claim 2,
Wherein the ceramic fiber blanket has a radial thickness in the range of 1/2 to 2 inches.
[5" claim-type="Currently amended] The method of claim 2,
Wherein the portion of the rigid cast fireproof jacket that is radially spaced apart from the stretch fluid cooled furnace member has a radial thickness in the range of about 1/2 to 2 inches.
[6" claim-type="Currently amended] The method of claim 2,
The stretched fluid-cooled furnace member to be insulated is a cylindrical pipe, wherein a pair of fire resistant tiles are wrapped around the pipe 360 ° and one of the pair of fire tiles is connected to two end walls of the other pair of fire tiles. A pair of synthetic fire resistant tiles characterized by having two end walls.
[7" claim-type="Currently amended] The method of claim 2,
The stretched fluid-cooled furnace member to be insulated is a cylindrical pipe having a skid rail surface, wherein a pair of fireproof tiles wrap around less than 360 ° around the pipe to expose the skidrail surface and one of the pair of fireproof tiles The pair of refractory tiles has a pair of synthetic refractory tiles, characterized in that it has one end wall connected to one end wall of the other pair of refractory tiles.
[8" claim-type="Currently amended] The method of claim 2,
And a weld access cavity in combination with the attachment assemblies of each of the refractory tiles and extending radially through the rigid cast refractory shell from the inner surface to the outer surface of the refractory tile.
[9" claim-type="Currently amended] The method of claim 8,
Wherein the size of the weld access cavity is selected to allow welding of the attachment assembly to the fluid cooled furnace member using a MIG-welder.
[10" claim-type="Currently amended] The method of claim 6,
The refractory tile is about 1/8 to 3/8 inches from at least one end wall of the pair of refractory tiles of the pair of refractory tiles when attached to the fluid cooled furnace member. A pair of synthetic refractory tiles, characterized in that formed so as to be spaced apart.
[11" claim-type="Currently amended] A pair of synthetic refractory tiles for use in metallurgical furnaces that insulate two fluid-cooled elongated furnace members with longitudinal axes arranged parallel to each other.
A rigid cast fireproof jacket disposed around a portion of the fluid cooled furnace member;
An inner surface comprising a selected portion in contact with the fluid cooled furnace member and a remaining portion spaced radially apart from the fluid cooled furnace member, thereby defining the hollow portion;
A ceramic fiber blanket in contact with the fluid cooling furnace member and filling the hollow portion; And
At least one attachment assembly positioned in at least one said selected portion of said rigid cast fireproof jacket in contact with at least one of said two fluid cooled furnace members,
A contact in which the attachment assembly contacts at least one of the two fluid cooled furnace members; And
A plurality of anchoring wires extending only from said outer surface to said rigid cast refractory portion extending radially inwardly from said outer surface to said inner surface in contact with said fluid cooled furnace member,
The rigid cast fireproof jacket includes an inner surface and an outer surface facing the inner surface, opposite end walls corresponding to the longitudinal direction of the stretched fluid cooled furnace member, and two end walls extending between the end walls. And wherein the two end walls of each tile are connected to the two end walls of the other pair of tiles.
[12" claim-type="Currently amended] A pair of synthetic refractory tiles for use in metallurgical furnaces that insulate two fluid-cooled drawing furnace members having longitudinal axes arranged parallel to each other, wherein one of the two fluid-cooling drawing furnace members has an upward skid rail. , Each fireproof tile
A rigid cast fireproof jacket disposed around a portion of the fluid cooled furnace member;
An inner surface comprising a selected portion in contact with the fluid cooled furnace member and a remaining portion spaced radially apart from the fluid cooled furnace member, thereby defining the hollow portion;
A ceramic fiber blanket in contact with the fluid cooling furnace member and filling the hollow portion; And
At least one attachment assembly positioned in at least one said selected portion of said rigid cast fireproof jacket in contact with at least one of said two fluid cooled furnace members,
A contact in which the attachment assembly contacts at least one of the two fluid cooled furnace members; And
A plurality of anchoring wires extending only from said outer surface to said rigid cast refractory portion extending radially inwardly from said outer surface to said inner surface in contact with said fluid cooled furnace member,
The rigid cast fireproof jacket includes an inner surface and an outer surface facing the inner surface, opposite end walls corresponding to the longitudinal direction of the stretched fluid cooled furnace member, and two end walls extending between the end walls. And one of the two end walls of each tile is connected to one of the two end walls of the other pair of the pair of tiles, and the other end wall of the two end walls of each tile faces the skid rail. Synthetic refractory tiles.
[13" claim-type="Currently amended] An insulation system for a metallurgical furnace having a stretched fluid cooled furnace member with a skidrail and a stretched fluid cooled furnace member without a skidrail.
A plurality of synthetic refractory tiles, each synthetic refractory tile comprising: a rigid cast refractory shell disposed around a portion of one fluid cooled furnace member;
An inner surface comprising a selected portion in contact with the fluid cooled furnace member and a remaining portion spaced apart from the fluid cooled furnace member at regular intervals, thereby defining a hollow portion;
A ceramic fiber blanket in contact with the fluid cooling furnace member and filling the hollow portion; And
At least one attachment assembly located in at least one said selected portion of said rigid cast fireproof jacket in contact with a fluid cooled furnace member,
A contact portion in which said attachment assembly contacts a fluid cooled furnace member; And
A plurality of anchoring wires extending only from said outer surface to said rigid cast refractory portion extending radially inwardly from said outer surface to said inner surface in contact with said fluid cooled furnace member,
The rigid cast fireproof jacket includes an inner surface and an outer surface facing the inner surface, opposite end walls corresponding to the longitudinal direction of the stretched fluid cooling furnace member to be insulated, and end walls extending between the end walls. And a plurality of pairs of tiles wrap around less than 360 ° around the fluid cooled furnace member with skid rails and around 360 ° around the remaining fluid cooled furnace member, and the end walls of each pair of tiles Insulation system, characterized in that connected to the end wall of the adjacent tiles.
[14" claim-type="Currently amended] The method according to any one of claims 2, 11, 12, and 13,
Wherein said contact portion of said attachment assembly comprises a band at least partially external to said fluid cooled furnace member and connected to at least two anchoring wires.
[15" claim-type="Currently amended] The method of claim 14,
And a weld plate fixed to the band by the plating method, wherein the band and the weld plate each have holes, and the holes are aligned in a row in the radial direction.
[16" claim-type="Currently amended] The method according to any one of claims 2, 11, 12, and 13,
The two pairs define at least one opening arranged to be paired with at least one similar opening positioned in a band of another pair of fireproof tiles of the pair of fireproof tiles when the fireproof tiles are installed. And a means for installing a pair of refractory tiles on the fluid cooled furnace member using fasteners inserted through the openings.
[17" claim-type="Currently amended] The method according to any one of claims 2, 11, 12, and 13,
The contact portion of the attachment assembly includes a welded base material for welding to the fluid cooled furnace member, and a flat washer coupled to the welded base material, wherein the welded base material and the flat washer to which the plurality of anchoring wires are coupled. A pair of synthetic refractory tiles characterized in that extend from.
[18" claim-type="Currently amended] The method of claim 17,
The weld base material defining a weld opening aligned radially in line with the opening of the flat washer, the aligned openings providing access for welding the attachment assembly to the fluid cooled furnace member. A pair of synthetic fireproof tiles.
[19" claim-type="Currently amended] A method of manufacturing a pair of synthetic refractory tiles that insulates stretched fluid-cooled furnace members in a metallurgical furnace, the method being described for each tile.
Providing a mold for casting a rigid refractory material having an outer wall and an inner wall opposite the outer wall to form a casting cavity;
At a selected location in the casting cavity, at least one attachment assembly having a contact portion installed to contact the furnace member is positioned so that each attachment assembly in use is restrained radially spaced apart from the fluid cooled furnace member. Forming a temperature lower than a temperature and positioned within said cast fireproof skin having said hollow portion;
Casting a refractory body in a mold;
At least partially curing the cast refractory;
Removing the cast refractory from the mold;
Providing a ceramic fiber blanket of material having a higher insulation k value than the cast fireproof jacket material having a thickness corresponding to the depth of the formed hollow portion;
Cutting the blanket corresponding to the shape of the hollow part; And
Inserting the blanket into the hollow portion,
And wherein the inner wall follows the shape of the furnace member to be insulated and includes hollows of selected depth in selected portions of the cast refractory body, including raised portions facing the casting cavity.
[20" claim-type="Currently amended] The method of claim 19,
Wherein said raised portion of the inner wall of the mold comprises an insert attached to the inner wall of the mold and facing the casting cavity.
[21" claim-type="Currently amended] A method of manufacturing a pair of synthetic refractory tiles that insulates stretched fluid-cooled furnace members in a metallurgical furnace, the method being described for each tile.
Providing a mold for casting a rigid refractory material having an outer wall and an inner wall opposite the outer wall to form a casting cavity;
Positioning the attachment assembly at a selected location in the casting cavity;
Casting a refractory body in a mold;
At least partially curing the cast refractory; And
Removing the cast refractory from the mold,
The attachment assembly follows the shape of the furnace member to be insulated and includes a raised portion of the ceramic fiber blanket facing the casting cavity to create a hollow of selected depth in the selected portion of the cast refractory body,
A contact portion arranged to contact the fluid cooled furnace member when installed; And
Extends only into the casting cavity in the absence of the ceramic fiber blanket
And a plurality of anchoring wires spaced apart from each other.
[22" claim-type="Currently amended] The method according to any one of claims 19, 20, and 21,
And said contact portion of said attachment assembly includes a band at least partially external to said furnace member and connected with at least two anchoring wires when said fluid cooled furnace member is installed in a tile.
[23" claim-type="Currently amended] The method of claim 22,
And the band is welded to the band in a plating manner, wherein the band and the weld plate each have holes, and the holes are aligned with one another in the radial direction.
[24" claim-type="Currently amended] The method of claim 22,
The two pairs define at least one opening arranged to mate with at least one similar opening located in the band of the other pair of fire resistant tiles of the pair of fire resistant tiles installed in the installation of the fire resistant tiles. And means for installing a pair of fire resistant tiles on said fluid cooled furnace member using fasteners inserted through said openings.
[25" claim-type="Currently amended] The method according to any one of claims 19, 20, and 21,
A welding base material for welding to the furnace member when the contact portion of the attachment assembly is installed in the fluid cooled furnace member, and a flat washer coupled to the welding base material, wherein the welding base material is coupled to the plurality of anchoring wires; And extending from the flat washer.
[26" claim-type="Currently amended] The method of claim 25,
Each of the welding base materials used in the installation of the furnace member defines a welding opening in which the welding substrate is aligned radially in line with the opening of the flat washer, wherein the aligned openings cause the fluid assembly to cool the attachment assembly upon installation of the furnace member. And providing access for welding to the furnace member.

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同族专利:

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公开号 | 公开日

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KR100494759B1|2005-06-10|

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US6575738B1|2003-06-10|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-08-16|Priority to US10/222,659

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2002-08-16|Priority to US10/222,659

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2002-12-27|Application filed by 스위 뉴엔 캐롤, 엔. 뉴엔 넉

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2004-02-21|Publication of KR20040016367A

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2005-06-10|Application granted

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2005-06-10|Publication of KR100494759B1

优先权:

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申请号 | 申请日 | 专利标题

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US10/222,659|US6575738B1|2002-08-16|2002-08-16|Composite refractory insulating tile|

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US10/222,659|2002-08-16|