US2029492A - Metallurgical furnace of the suspended arch type - Google Patents

Metallurgical furnace of the suspended arch type Download PDF

Info

Publication number
US2029492A
US2029492A US673674A US67367433A US2029492A US 2029492 A US2029492 A US 2029492A US 673674 A US673674 A US 673674A US 67367433 A US67367433 A US 67367433A US 2029492 A US2029492 A US 2029492A
Authority
US
United States
Prior art keywords
side walls
roof
suspended
walls
furnace
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
Application number
US673674A
Inventor
Karl A Lindner
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.)
American Smelting and Refining Co
Original Assignee
American Smelting and Refining Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Smelting and Refining Co filed Critical American Smelting and Refining Co
Priority to US673674A priority Critical patent/US2029492A/en
Application granted granted Critical
Publication of US2029492A publication Critical patent/US2029492A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/02Crowns; Roofs
    • F27D1/021Suspended roofs

Definitions

  • This invention relates to metallurgical furnaces of the suspended arch type and particularly concerns improvements in the side wall construction of such furnaces.
  • furnaces of the suspended arch type which type shall be understood in the present specification and claims to designate furnaces in which the roof or arch is supported independently of the side wall
  • furnaces of the so-called spring arch type in which the arch or roof sprung from the side 4 walls and was supported thereby.
  • Certain defects were, however, inherent in the construction of furnaces of the sprung arch type.
  • the choice of materials for building the side walls was limited to relatively strong materials as the side walls supported the entire weight of the roof.
  • attempts were often made to employ lighter materials in the construction of the roof arch, but, while such construction decreased failures in the side walls, failures in the arches increased.
  • furnaces of the suspended arch type when employed for the treatment of metals of a high specific gravity, as, for example, lead or alloys thereof, have not been entirely satisfactory due to recurring failures of the side walls.
  • Fig. 1 is a cross-sectional view of a reverberatory furnace of the suspended arch type embodying the principles of the present invention
  • a reverberatory furnace is shown with buckstays 9, refractory side walls [0 and roof I l suspended by hangers l2. Brackets l3 affixed to side plates 14 pro ect generic in their application as the art will per- 3O into and are embedded in refractory wall Ill.
  • Walls Ila provide a water 'jacket extending to substantially the height of the metal or bath line l5, while I6 indicates the space in the jacket for the circulation of water.
  • brackets l3 aflixed as by welding to the side plates M which in turn are secured to buckstays S in the same or a similar manner serve to anchor the refractory material comprising the side walls and resist upward vertical movement of the side walls when the furnace is in use.
  • the molten metal in the furnace is unable to penetrate the walls with the result that side wall failures, not uncommonly experienced in suspended arch furnaces, are largely eliminated.
  • brazed beams extending along the top of the refractory side walls and suitably anchored may be used.
  • anchoring means suitably affixed to the side plates which will inhibit vertical side wall movement will be apparent to those skilled in the art.
  • the present invention by greatly reducing the number of side wall failures and eliminating the cause thereof makes possible the commercial use of metallurgical furnaces having independently supported roofs in treating metals w high'speciflc gravities, as, for example, lead an alloys thereof.
  • brackets secured to said framework and em-- forcing frame' adjacent to. the side walls, and brackets embedded in the'side walls and rigidly v secured to the said reinforcing for overcomingtendencyof'thesidewallstomoveunder reinforcing the brackets, the said brackets and webs being adapted to overcome movement of the side walls under the action of molten 'metal entering into openings in the side walls formed during operation of the furnace.
  • a metallurgical furnace comprising the combination with a framework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing frame for the side walls including buckstays adjacent to the side walls and substantially triangular brackets embedded in the side walls and welded to the buckstays, the saidbrackets having one side extending at substantially right angles to the buckstaysand having their longest side positioned to rigidly brace the outstanding side for counteracting tendency of the side walls to become displaced under action of molten metal 7 entering openings in the said walls formed during operation of the'furnace.
  • a metallurgical furnace comprising the combination with ad'ramework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing framework adjacent to the side walls and means rigidly secured to the framework and embedded in the side walls in position to counteract tendency of the side walls to become displaced under action of molten metal entering openings in the said walls.
  • a metallurgical furnace comprising the combination with a framework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing framework adjacent to the side walls, and means secured to the framework and associated with the side walls in position to counteract tendency of the side walls to become displaced under buoyant action of molten metal entering openinsqin the side walls.
  • a metallurgical furnace comprising the combination with a framework, of a roof suspended from the framework, an outer retaining framework, side plates secured thereto, brackets integral therewith, and refractory side walls, the said brackets being anchored in the said refractory side walls at a point above the metal line of the-furnace and acting upon the sidewalls to counteract any tendency of the side walls to become displaced-through buoyant action of molten metal entering openings in the side walls.
  • a metallurgical furnace comprising, in

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Feb. 4, 1936.
K. A. LINDYNERV METALLURGICAL FURliAGE OF THE SUSPENDED ARCH TYPE Filed May 51, 1933 IIYVENTOR. {Tar/19. [trainer B ATTORNEYS.
ures common in the sprung arch construction Patented F el). 4, 1 936 2,029,492 PATENT OFFICE METAILURGICAL FURNACE or 'r'np SUSPENDED ARCH TYPE Karl A. Lindner, Roselle Park, N.. J., assignor to American .Smelting and Refining Company, New York, N. Y., a corporation of New Jersey Application May 31, 1933, Serial No. 673,674
12 Claims. (01. 263-46) This invention relates to metallurgical furnaces of the suspended arch type and particularly concerns improvements in the side wall construction of such furnaces.
Prior to the, introduction of furnaces of the suspended arch type, which type shall be understood in the present specification and claims to designate furnaces in which the roof or arch is supported independently of the side wall, it was usual in the metallurgical art to employ furnaces of the so-called spring arch type in which the arch or roof sprung from the side 4 walls and was supported thereby. Certain defects were, however, inherent in the construction of furnaces of the sprung arch type. For example, the choice of materials for building the side walls was limited to relatively strong materials as the side walls supported the entire weight of the roof. In order to decrease damage to the side walls, attempts were often made to employ lighter materials in the construction of the roof arch, but, while such construction decreased failures in the side walls, failures in the arches increased. Theseand other disadvantages attending the sprung arch construction led to the development of furnaces of the suspended arch type.
With the advent of furnaces in which the roof was independently supported of the side walls, many of the disadvantages accompanying the old sprung arch construction were eliminated. By independently suspending the roof and thus removing the load from the side walls, the range of materials used in both. side wall and roof construction was widened and many of the failwere eliminated.
However, furnaces of the suspended arch type when employed for the treatment of metals of a high specific gravity, as, for example, lead or alloys thereof, have not been entirely satisfactory due to recurring failures of the side walls.
In fact, side wall failures in the case of furnaces operating on such materials occur so frequently that the use of suspended arch furnaces has often been abandoned in spite of the many other desirable features attending such construction. I have found that the repeated side wall failures in metallurgical furnaces of the suspended arch type are due to vertical movement of the side walls themselves. In other words, the side walls By my invention it is possible to, greatly reduce or practically eliminate failures of the side walls in metallurgical furnaces employing the suspended arch type of construction. To accomplish this desired objective I anchor the side walls at a point above the metal or bath line of the furnace in such manner that vertical movement of the refractory material comprising the side walls is prevented.
Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by re-. ferring to the following description takenin connection with the accompanying drawing forming a part thereof, in which Fig. 1 is a cross-sectional view of a reverberatory furnace of the suspended arch type embodying the principles of the present invention;
Like reference characters denote like parts in the several figures of the drawing.
In the following description and in the claims,
various details will be identified by specific names;
for convenience, but they are intended to be as' mit.
Referring now to the drawing, a reverberatory furnace is shown with buckstays 9, refractory side walls [0 and roof I l suspended by hangers l2. Brackets l3 affixed to side plates 14 pro ect generic in their application as the art will per- 3O into and are embedded in refractory wall Ill.
Walls Ila provide a water 'jacket extending to substantially the height of the metal or bath line l5, while I6 indicates the space in the jacket for the circulation of water.
In operation, the brackets l3 aflixed as by welding to the side plates M which in turn are secured to buckstays S in the same or a similar manner serve to anchor the refractory material comprising the side walls and resist upward vertical movement of the side walls when the furnace is in use. By thus inhibiting the upward vertical movement of the refractory walls the molten metal in the furnace is unable to penetrate the walls with the result that side wall failures, not uncommonly experienced in suspended arch furnaces, are largely eliminated.
While in the specific embodiment of the inven tion shown in the accompanying drawing vertical movement of the side walls is prevented by means of brackets welded to the side plates and embedded in the-refractory w'alls above the metal line of the bath, other means of inhibiting the vertical movement referred to may be employed.
For example, brazed beams extending along the top of the refractory side walls and suitably anchored may be used. Again other types of anchoring means suitably affixed to the side plates which will inhibit vertical side wall movement will be apparent to those skilled in the art.
It will thus be appreciated that the present invention by greatly reducing the number of side wall failures and eliminating the cause thereof makes possible the commercial use of metallurgical furnaces having independently supported roofs in treating metals w high'speciflc gravities, as, for example, lead an alloys thereof.
While certain novel features of the invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit of the invention.
and embedded in said walls whereby vertical movement 'of said refractory .walls is prevented.
3. In a metallurgical furnace of the suspended arch type for treating metals of high specific gravity, vertical side walls formed of blocks of refractory material, said side walls being in direct contact with the molten metal below the metal line in said furnace and extending above said metal line, metal side plates covering the outside of said side walls and secured to an outer retaining framework, and brackets'secured t0 the inside surfaces of said side plates and embedded in said side walls to prevent vertical movement of said walls.
4.'In a metallurgical furnace of the suspended arch type, vertical side walls and a separately suspended roof of refractory material, said side walls extending from below the metal line. of said furnace to said roof, an outer retaining member and brackets secured thereto and embedded in said side walls intermediate said roof and said metal line to retain the lower portions of said walls in place.
5. In ametallurgicalfurnaceofthe arch type for treating metals of h gh density, vertical side walls of refractory material, a roof, said side walls extending from below the metal lineinsaidfurnacetosaidrooLametalframe work outside said furnace supporting said roof,
and brackets secured to said framework and em-- forcing frame' adjacent to. the side walls, and brackets embedded in the'side walls and rigidly v secured to the said reinforcing for overcomingtendencyof'thesidewallstomoveunder reinforcing the brackets, the said brackets and webs being adapted to overcome movement of the side walls under the action of molten 'metal entering into openings in the side walls formed during operation of the furnace.
8. A metallurgical furnace comprising the combination with a framework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing frame for the side walls including buckstays adjacent to the side walls and substantially triangular brackets embedded in the side walls and welded to the buckstays, the saidbrackets having one side extending at substantially right angles to the buckstaysand having their longest side positioned to rigidly brace the outstanding side for counteracting tendency of the side walls to become displaced under action of molten metal 7 entering openings in the said walls formed during operation of the'furnace.
9. A metallurgical furnace comprising the combination with ad'ramework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing framework adjacent to the side walls and means rigidly secured to the framework and embedded in the side walls in position to counteract tendency of the side walls to become displaced under action of molten metal entering openings in the said walls.
10. A metallurgical furnace comprising the combination with a framework and a roof suspended from the framework, of side walls cooperating with the roof but independent thereof, a reinforcing framework adjacent to the side walls, and means secured to the framework and associated with the side walls in position to counteract tendency of the side walls to become displaced under buoyant action of molten metal entering openinsqin the side walls.
- 11. A metallurgical furnace comprising the combination with a framework, of a roof suspended from the framework, an outer retaining framework, side plates secured thereto, brackets integral therewith, and refractory side walls, the said brackets being anchored in the said refractory side walls at a point above the metal line of the-furnace and acting upon the sidewalls to counteract any tendency of the side walls to become displaced-through buoyant action of molten metal entering openings in the side walls.
12. A metallurgical furnace comprising, in
' combination, a suspended roof, refractory walls and anchored side plates with brackets secured thereto, the said brackets being embedded in the said refractory walls and bearingthereon to resist tendency of deformation of the walls under buoyancy of. molten metal entering openings in the said walls. v
' KARL A. LINDNER.
US673674A 1933-05-31 1933-05-31 Metallurgical furnace of the suspended arch type Expired - Lifetime US2029492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US673674A US2029492A (en) 1933-05-31 1933-05-31 Metallurgical furnace of the suspended arch type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US673674A US2029492A (en) 1933-05-31 1933-05-31 Metallurgical furnace of the suspended arch type

Publications (1)

Publication Number Publication Date
US2029492A true US2029492A (en) 1936-02-04

Family

ID=24703639

Family Applications (1)

Application Number Title Priority Date Filing Date
US673674A Expired - Lifetime US2029492A (en) 1933-05-31 1933-05-31 Metallurgical furnace of the suspended arch type

Country Status (1)

Country Link
US (1) US2029492A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814476A (en) * 1955-03-30 1957-11-26 Gen Refractories Co Arc furnace roof
US3190626A (en) * 1962-10-01 1965-06-22 Union Carbide Corp Support means for a refractory lined furnace
US3375315A (en) * 1963-11-18 1968-03-26 John G Stein & Company Ltd Arc furnace roof
US5277580A (en) * 1993-02-16 1994-01-11 Lea-Con, Inc. Wall construction system for refractory furnaces
US5862641A (en) * 1996-01-06 1999-01-26 Lea-Con, Inc. Kiln anchor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814476A (en) * 1955-03-30 1957-11-26 Gen Refractories Co Arc furnace roof
US3190626A (en) * 1962-10-01 1965-06-22 Union Carbide Corp Support means for a refractory lined furnace
US3375315A (en) * 1963-11-18 1968-03-26 John G Stein & Company Ltd Arc furnace roof
US5277580A (en) * 1993-02-16 1994-01-11 Lea-Con, Inc. Wall construction system for refractory furnaces
US5862641A (en) * 1996-01-06 1999-01-26 Lea-Con, Inc. Kiln anchor

Similar Documents

Publication Publication Date Title
US2029492A (en) Metallurgical furnace of the suspended arch type
US2236920A (en) Open hearth furnace roof
US2486348A (en) Blast furnace wall structure
US2222978A (en) Roof guard for open hearth
US2737912A (en) Furnace arch
US1773359A (en) Method of making furnace roofs
US3164657A (en) Electric furnace construction
US2098586A (en) Reverberatory furnace
US2148856A (en) Stock line wearing element
US2334275A (en) Gas removing device for electric furnaces
US3358986A (en) Stockline lining for a blast furnace
US1445860A (en) Apparatus for treating metals
US2261397A (en) Furnace construction
US1563038A (en) Method of maintaining open-hearth-furnace walls
US3073264A (en) Furnace roof suspended by interconnected brick hanger extensions
US2156008A (en) Continuous furnace
US3396684A (en) Basic refractory furnace structure
US3144842A (en) Supporting structure
US1448161A (en) Furnace
US3400208A (en) Tapered shell electric furnace
US2485305A (en) Bessemer converter
US3129678A (en) Furnace roof
US3453787A (en) Furnace roof construction
SU477292A1 (en) Arch vault open-hearth furnace
US2869488A (en) Dual arch