US3667181A - Furnace wall particularly for open-hearth furnaces - Google Patents

Furnace wall particularly for open-hearth furnaces Download PDF

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Publication number
US3667181A
US3667181A US60688A US6068870A US3667181A US 3667181 A US3667181 A US 3667181A US 60688 A US60688 A US 60688A US 6068870 A US6068870 A US 6068870A US 3667181 A US3667181 A US 3667181A
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United States
Prior art keywords
wall
furnace
posts
locking elements
bricks
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Expired - Lifetime
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US60688A
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English (en)
Inventor
Gunter Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Didier Werke AG
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Didier Werke AG
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Publication date
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    • 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

Definitions

  • the fastening members are angle brackets projecting externally beyond the thickness of the wall posts with upwardly pointing free angle ends.
  • the locking elements may be ladder-like locking elements having at least one stringer and a plurality of transverse rungs mounted on the sides of the wall posts facing away from the furnace interior so that the rungs interpose themselves between the wall posts and the free angle ends in a vertical row.
  • the invention relates to the construction of furnace walls, particularly the rear walls and the like of industrial furnaces, such as open-hearth furnaces, in which the wall-forming refractory bricks of each two consecutive courses of bricks are directly located by horizontal carrier bars elevationally slidably mounted on the wall posts of the furnace framing with complementary recesses in the bricks cooperating to embrace the carrier rail.
  • the furnace walls are among the most highly stressed zones. They are close to the melting flame, exposed to spurts of slag, the impact of a fresh burden, high temperature fluctuations and the presence of much oxygen, all of which naturally lead to rapid wear of the brickwork. Repairs are therefore often necessary to enable an efficient melting routine to be maintained. Such intermediate repairs are very expensive, particularly when the brickwork is so held that the replacement of parts thereof presents considerable difficulties.
  • the first necessary step is to undo the carrier supporting that portion of the brickwork that requires renewal. This must be done by burning off all the hook ends that project behind the flange parts of the posts and that extend from carriers associated with the brickwork that is to be renewed. Not until this has been done can the bricks be pushed inwards into the furnace interior. Since in some instances it may be necessary to remove an entire worn wall for a main repair the complicated and timeconsuming necessity of releasing the carriers is a great nuisance, and the undesirable period for which the furnace must remain idle is of considerable duration.
  • a further object is to provide a construction wherein the carrier rails are provided with fastening members that are releasably engageable by locking elements bearing against the wall posts. This permits the fastening elements to be released by removing the locking elements and hence the associated horizontal carrier rails and the bricks they carry to be detached from the wall posts of the furnace shell in a manner that is as simple as it is quick. The released worn brickwork which is to be replaced can be tipped into the furnace interior without further ado.
  • a further object is to provide a construction wherein one locking element may be arranged releasably to locate a plurality of fastening members on one wall post. This enables a plurality of carrier rails and the courses of bricks they cany to be simultaneously released from the wall posts. Ifthe locking elements are suitably dimensioned the furnace wall can thus be divided into several areas or sections so that each can be individually released from the wall posts and then tipped into the furnace interior.
  • a still further object is to provide.
  • a construction wherein the free ends of the carrier rails and their sides facing away from the furnace interior may be provided, by way of fastening members with angle brackets that project on the outside of the furnace beyond the thickness of the wall posts, and that have upwardly pointing angle ends and, for locating the carrier rails and the brickwork supported by them, ladder-like locking elements consisting of at least one stringer and a plurality of transverse rungs may be provided and adapted so to be mounted on the sides of the wall posts facing away from the furnace interior so that the rungs interpose themselves between the wall posts and the free angle ends of the bricket members in a vertical row and thus locate them.
  • the length of the angle ends of the angle brackets may be arranged to exceed the thickness of the rungs of the locking element.
  • FIG. 1 is a perspective view of the construction of a furnace wall according to the invention
  • FIG. 2 is a cross sectional view of the furnace wall
  • FIG. 3 is a perspective view of the furnace wall comprising divided locking elements
  • FIG. 4 is a cross sectional view of a furnace wall, also indicating a releasing tool
  • FIG. 5 is an external fragmentary view of the wall of an electric .fumace.
  • FIG. 6 is a cross section of such a wall portion.
  • the furnace wall consists of a wearing wall of refractory bricks l forming a lining on the inside of the posts 2 of the furnace framing.
  • the ends of the bricks l of the wearing wall facing away from the furnace interior are each formed with a recess 3 or the like.
  • Location of the bricks 1 by a carrier rail 4 during the assembly of the wall is obtained by so placing the bricks that the recesses 3 of the bricks l in consecutive courses 5 together embrace the carriers 4. At the same time the bricks 1 are maintained in contact with the carriers 4 which thus keep them in position.
  • One carrier 4 holds two consecutive courses 5.
  • the free ends and the sides of the carriers facing away from the furnace interior are fitted with angle brackets 7 forming fastening members 6.
  • the length of the angle brackets 7 is so determined that when the carriers 4 are placed flush against the inside faces of the wall posts 2, the angle brackets project a certain distance on the outside of the wall posts.
  • the angled ends 8 of the angle brackets 7 point upwards.
  • the carriers 4 are located on the wall posts 2 by the interposition of locking elements 9.
  • the locking elements 9 may be simple integral locking bars 9 (FIGS. 4, 5 and 6) or they may be ladder-like elements (FIGS. 1, 2 and 3) consisting of one or two stringers 10 to which rungs l l are attached, or which are interconnected by rungs l 1.
  • the spacing of the rungs 11 corresponds to the spacing of the carriers 4 for the bricks 1 of the wearing wall.
  • the carriers 4 and hence the courses of bricks 5 are located on the wall posts 2 by the locking elements 9 and 9 after the wearing wall or part thereof has been erected.
  • the lengthof the carriers 4 is cut accordingly so that a double row of upwardly pointing angle ends 8 of the angle brackets will project on the outside.
  • FIG. 4 illustrates a tool 12 fitted with ejectors 13 adapted to engage the undersides of the locking elements 9 in the form of individual bars.
  • the locking elements 9, 10, 11 may also be of composite construction, i.e., for instance according to the height of the wall two or more locking elements9 may be associated the one above the other with one wall member 2. If the length of the carriers 4 is also suitably selected a wall can thus be easily subdivided into a plurality of separately locatable and releasable areas of brickwork.
  • the length of the angle ends 8 is arranged slightly to exceed the thickness of the rungs l l.
  • bracket members 6, of the carriers 4 and of the locking elements could be envisaged.
  • the invention is applicable with particular advantage to electric furnaces. It has been the practice in the past to repair the higher rate wear in the phase region from inside the furnace. However, this always involves a number of difficulties.
  • the proposed construction of the furnace chamber permits brickwork portions in the phase region where they have been subjected to higher rate of wear to be removed from the outside.
  • windows 15 are provided in the sheet metal envelope 14 of the electric furnace in the region of the transformer phase.
  • the bricks l in the region of the windows 15 are located by carriers 4, the angle ends 7 of fastenings elements 6 attached thereto and locking elements 9.
  • the free ends of the locking elements 9' are welded to the outside of the sheet metal envelope 14 (FIGS. and 6).
  • the brickwork in the regon of the window is released as already described by disengaging the locking elements 9 from the angle ends 7.
  • the bricks 1 can then be pulled outwards and replaced by fresh bricks.
  • the angle ends 7 fitted to the sheet metal envelope 14 are of suitable size to permit variations in the level of the brick courses to be absorbed.
  • a furnace wall particularly for the rear wall and the like of an industrial furnace, comprising a furnace framing having wall posts, horizontal carrier rails elevationally slidably mounted on said wall posts for locating the wall-forming refractory bricks of each two consecutive courses of bricks, said bricks having complementary recesses cooperating to embrace said earrier rails, fastening members for said carrier rails, locking elements bearing against said wall posts releasably engaging said fastening members, one of said locking elements releasably locating a plurality of said fastening members on one of said wall posts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US60688A 1969-09-16 1970-08-03 Furnace wall particularly for open-hearth furnaces Expired - Lifetime US3667181A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691946800 DE1946800B1 (de) 1969-09-16 1969-09-16 Herdraumwand,insbesondere fuer Rueckwaende u.dgl. von Industrieoefen,z.B. Siemens-Martin-OEfen

Publications (1)

Publication Number Publication Date
US3667181A true US3667181A (en) 1972-06-06

Family

ID=5745616

Family Applications (1)

Application Number Title Priority Date Filing Date
US60688A Expired - Lifetime US3667181A (en) 1969-09-16 1970-08-03 Furnace wall particularly for open-hearth furnaces

Country Status (10)

Country Link
US (1) US3667181A (de)
AT (1) AT318674B (de)
BE (1) BE751972A (de)
CH (1) CH524118A (de)
DE (1) DE1946800B1 (de)
ES (1) ES380481A1 (de)
FR (1) FR2061377A5 (de)
GB (1) GB1316150A (de)
SE (1) SE354349C (de)
ZA (1) ZA706218B (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281951A (en) * 1938-09-20 1942-05-05 American Arch Co Furnace wall

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281951A (en) * 1938-09-20 1942-05-05 American Arch Co Furnace wall

Also Published As

Publication number Publication date
DE1946800B1 (de) 1971-05-27
BE751972A (fr) 1970-11-16
SE354349B (sv) 1973-03-05
GB1316150A (en) 1973-05-09
FR2061377A5 (de) 1971-06-18
SE354349C (sv) 1974-07-08
ZA706218B (en) 1971-04-28
ES380481A1 (es) 1972-09-16
CH524118A (de) 1972-06-15
AT318674B (de) 1974-11-11

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