US3013510A - Furnace roof and method of making the same - Google Patents
Furnace roof and method of making the same Download PDFInfo
- Publication number
- US3013510A US3013510A US744733A US74473358A US3013510A US 3013510 A US3013510 A US 3013510A US 744733 A US744733 A US 744733A US 74473358 A US74473358 A US 74473358A US 3013510 A US3013510 A US 3013510A
- Authority
- US
- United States
- Prior art keywords
- roof
- bricks
- span
- furnace
- arch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 7
- 239000011449 brick Substances 0.000 description 67
- 238000010438 heat treatment Methods 0.000 description 21
- 239000002184 metal Substances 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- 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
- F27D1/02—Crowns; Roofs
- F27D1/025—Roofs supported around their periphery, e.g. arched roofs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/06—Crowns or roofs for combustion chambers
-
- 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
- F27D1/02—Crowns; Roofs
- F27D1/021—Suspended roofs
Definitions
- This invention relates to a furnace roof and a method of making the same and particularly to a roof for an open hearth furnace.
- Most open hearth furnaces have roofs made of silica brick, but such bricks are not capable of withstanding the temperatures which result when using oxygen in the open hearth. Even prior to the advent of oxygen in open hearth practice, care had to be taken to prevent the silica roof from being overheated. For these reasons, attempts have been made to use basic brick in the open hearth furnace room.
- Another object is to provide a method of making such a roof.
- FIGURE 1 is a view of the furnace roof taken longitudinally of the span of the arch;
- FIGURE 2 is a view taken on the URE 1;
- FIGURE 3 is a view taken on the line III-III of FIGURE 1;
- FIGURE 4 is a plan view of a standard metal clad basic brick
- FIGURE 5- is an elevation of the brick of FIGURE 4.
- reference numeral 2 indicates an open hearth furnace having a front wall 4 and a back wall 6.
- Buck stays S at the front and rear walls extend upwardly above furnace roof I0 and are connected at their tops by means of channels 12 extending longitudinally of the span of the roof.
- Channels 14 extending transversely of the span of the roof also connect the upper parts of the buck stays 8.
- the parts so far described, except for the details of the roof, are conventional.
- a plurality of rods 16 extend transversely of the roof span and are spaced apart longitudinally of the span.
- the rods 16 are suspended by means of hangers 18 from bars 29 supported on top of the channels 12.
- the rods 16 pass through holes 22 in steel plates 24 which extend longitudinally of the roof span.
- Skew back bricks 26 are supported by beams 28 at the front and rear of the furnace.
- the roof is shown as a ribbed ring arch in which the larger bricks 30, making up the ribs, are arranged on each side of the plates 24. Smaller bricks 32 are arranged between the bricks 3%.
- the bottom of the plates 24 are shaped to conform to the bottom of the arch of the roof and the top of the plates 24 have notches 34 therein with the notches 34 of each plate 24 being aligned with the notches in the adjacent plates.
- a beam or rail 36 extending transversely of the span of the roof rests in each set of aligned notches line IIII of FIG- tates Patent 34.
- Jacks 38 attached to the top tie channels 12 are used to hold the beams 36 down against the plates 24 and the bricks 30 or in case of a plain ring arch against, the bricks in all of the rings.
- the plates 24 in addition to suspending the brick also serve to maintain the arch contour. It is preferred that the bricks 3i and 32 be metal clad with metal sheets 39 in the usual manner.
- conventional arch forms are set in the furnace with the top of the arch extending between skew back bricks 26 at the spring line of the arch.
- the bricks 30 and 32 are laid dry on the arch forms in courses or rings extending longitudinally of the span of the roof and the plates 24 are positioned between adjacent rings of the'larger bricks 3i). This may be done by first sliding all of the plates 24 on the rods 22 and then sliding each plate in position befor laying up the brick.
- the rise per foot of roof span should preferably be a minimum of two inches and that the bricks should be closely spaced along the length of the span of the arch.
- the expansion allowance across the roof should be no more than .5 along the length of the span of the arch.
- the holddown members 36 are inserted in the slots 34 and the jacks 38 adjusted so that the bottom of the members 36 rest on top of the roof. Heat is then applied to the roof with expansion of the roof upwardly being restricted by means of the holddown members 34 and the expansion along the length of the span of the roof being restricted to no more than .5% due to the close spacing of the bricks. This causes the bricks to unite with each other and to fuse to the plates 24. While three spacer plates 24 are shown, the number may vary as deemed desirable.
- An arched furnace roof comprising an upper support, fixed skewbacks at each end of the arch arranged so that the distance between the skewbacks remains substantially constant at all times, flat metal plates extending longitudinally of the span of the roof and arranged at spaced intervals transversely of the span of the roof, said plates being carried by said upper support, closely spaced basic bricks between the metal plates with at least part of said bricks in contact with said plates, and hold down members on the top of said roof for essentially preventing upward movement thereof during heating up and subsequent operation of the furnace.
- An arched furnace roof comprising fixed skewbacks at each eand of the arch arranged so that the distance between the skewbacks remains substantially constant during heating up and subsequent operation of the furnace, rings of basic bricks extending longitudinally of the span of the arch, an upper support for carrying said rings of bricks, rings of non-suspended basic bricks 50 between said suspended bricks, the bricks in each ring prior to heating up being in sufiiciently close relationship along the longitudinal span of the arch so as to limit the expansion to no more than .5 along the length of the span of the arch during heating up and subsequent operation of the furnace, and hold down members on the top of said roof for essentially preventing upward movement of said bricks during heating up and subsequent operation of the furnace.
- An arched furnace roof comprising an upper support, fixed skewbacks at each end of the arch arranged so that the distance between the skewbacks remains substantially constant at all times, fiat metal plates extending longitudinally of the span of the roof and arranged at spaced intervals transversely of the span of the roof, said plates being carried by said upper support, basic bricks between the metal plates with at least part of said bricks in contact with said plates and prior to heating up being in sufficiently close relationship along the longitudinal span of the arch so as to limit the expansion to no more than 5% along the length of the span of the arch during heating up and subsequent operation of the furnace, and hold down members on the top of said roof for essentially preventing upward movement of said bricks during heating up and subsequent operation of the furnace.
- An arched furnace roof comprising an upper support, fixed skewbacks at each end of the arch arranged so that the distance between the skewbacks remains substantially constant at all times, flat metal plates extending longitudinally of the span of the roof and arranged at spaced intervals transversely of the span of the roof, means connecting said plates to said upper support, rings of basic bricks between the metal plates with the bricks in at least some of the rings contacting said plates and being fused thereto and to adjacent bricks, and hold down members on the top of said roof for essentially preventing upward movement of said bricks during heating up and subsequent operation of the furnace.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Tunnel Furnaces (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US744733A US3013510A (en) | 1958-06-26 | 1958-06-26 | Furnace roof and method of making the same |
GB19759/59A GB903670A (en) | 1958-06-26 | 1959-06-09 | Furnace roof and method of making same |
ES0250159A ES250159A1 (es) | 1958-06-26 | 1959-06-15 | Sistema de techo arqueado de horno |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US744733A US3013510A (en) | 1958-06-26 | 1958-06-26 | Furnace roof and method of making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US3013510A true US3013510A (en) | 1961-12-19 |
Family
ID=24993787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US744733A Expired - Lifetime US3013510A (en) | 1958-06-26 | 1958-06-26 | Furnace roof and method of making the same |
Country Status (3)
Country | Link |
---|---|
US (1) | US3013510A (es) |
ES (1) | ES250159A1 (es) |
GB (1) | GB903670A (es) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183865A (en) * | 1962-03-08 | 1965-05-18 | Corhart Refractories Company I | Refractory arch furnace roof |
US3198147A (en) * | 1962-06-21 | 1965-08-03 | Nat Steel Corp | Furnace-roof construction |
US3199477A (en) * | 1963-09-18 | 1965-08-10 | E J Lavino & Co | Interlocking brick |
US3387575A (en) * | 1964-09-08 | 1968-06-11 | Bethlehem Steel Corp | Basic roof construction for a metallurgical furnace |
US3396684A (en) * | 1966-10-10 | 1968-08-13 | United States Steel Corp | Basic refractory furnace structure |
US20210024398A1 (en) * | 2018-06-21 | 2021-01-28 | Jushi Group Co., Ltd. | Glass fiber tank kiln passage crown structure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1500240A (en) * | 1922-11-03 | 1924-07-08 | Raymond E Griffith | Furnace-roof construction |
US2222978A (en) * | 1939-02-18 | 1940-11-26 | Kiren Joe | Roof guard for open hearth |
DE922665C (de) * | 1940-08-02 | 1955-01-24 | Oesterr Amerikan Magnesit | Gewoelbe fuer Industrieoefen mit aufgehaengten Gewoelbesteinen |
US2737912A (en) * | 1952-09-23 | 1956-03-13 | Didier Werke Ag | Furnace arch |
DE941809C (de) * | 1940-11-22 | 1956-04-19 | Oesterr Amerikan Magnesit | Gewoelbe fuer Industrieoefen mit aufgehaengten Gewoelbesteinen |
FR1128461A (fr) * | 1954-04-02 | 1957-01-07 | Oesterr Amerikan Magnesit | Perfectionnements apportés aux procédés pour contrôler les tensions internes dans des voûtes qui deviennent chaudes, plus spécialement les voûtes de fours à réverbère tels que les fours siemens-martin ou analogues et aux dispositifs convenant à la mise en oeuvre de ces procédés |
US2781006A (en) * | 1952-09-10 | 1957-02-12 | Gen Refractories Co | Refractory wall and roof making |
-
1958
- 1958-06-26 US US744733A patent/US3013510A/en not_active Expired - Lifetime
-
1959
- 1959-06-09 GB GB19759/59A patent/GB903670A/en not_active Expired
- 1959-06-15 ES ES0250159A patent/ES250159A1/es not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1500240A (en) * | 1922-11-03 | 1924-07-08 | Raymond E Griffith | Furnace-roof construction |
US2222978A (en) * | 1939-02-18 | 1940-11-26 | Kiren Joe | Roof guard for open hearth |
DE922665C (de) * | 1940-08-02 | 1955-01-24 | Oesterr Amerikan Magnesit | Gewoelbe fuer Industrieoefen mit aufgehaengten Gewoelbesteinen |
DE941809C (de) * | 1940-11-22 | 1956-04-19 | Oesterr Amerikan Magnesit | Gewoelbe fuer Industrieoefen mit aufgehaengten Gewoelbesteinen |
US2781006A (en) * | 1952-09-10 | 1957-02-12 | Gen Refractories Co | Refractory wall and roof making |
US2737912A (en) * | 1952-09-23 | 1956-03-13 | Didier Werke Ag | Furnace arch |
FR1128461A (fr) * | 1954-04-02 | 1957-01-07 | Oesterr Amerikan Magnesit | Perfectionnements apportés aux procédés pour contrôler les tensions internes dans des voûtes qui deviennent chaudes, plus spécialement les voûtes de fours à réverbère tels que les fours siemens-martin ou analogues et aux dispositifs convenant à la mise en oeuvre de ces procédés |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183865A (en) * | 1962-03-08 | 1965-05-18 | Corhart Refractories Company I | Refractory arch furnace roof |
US3198147A (en) * | 1962-06-21 | 1965-08-03 | Nat Steel Corp | Furnace-roof construction |
US3199477A (en) * | 1963-09-18 | 1965-08-10 | E J Lavino & Co | Interlocking brick |
US3387575A (en) * | 1964-09-08 | 1968-06-11 | Bethlehem Steel Corp | Basic roof construction for a metallurgical furnace |
US3396684A (en) * | 1966-10-10 | 1968-08-13 | United States Steel Corp | Basic refractory furnace structure |
US20210024398A1 (en) * | 2018-06-21 | 2021-01-28 | Jushi Group Co., Ltd. | Glass fiber tank kiln passage crown structure |
Also Published As
Publication number | Publication date |
---|---|
GB903670A (en) | 1962-08-15 |
ES250159A1 (es) | 1960-01-16 |
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