US2013966A

US2013966A - Metallurgical furnace

Info

Publication number: US2013966A
Application number: US650236A
Authority: US
Inventors: Charles R Kuzell
Original assignee: Phelps Dodge Corp
Current assignee: Freeport Minerals Corp
Priority date: 1933-01-05
Filing date: 1933-01-05
Publication date: 1935-09-10
Anticipated expiration: 1952-09-10

Description

Sept. 10, 1935.

C. R. KUZELL METALLURGICAL FURNACE l2 rsheets-sheet 1 Filed Jan. 5, 1933 ATTORNEYS,

Sept. 1o, 1935.

proved reverb Patent'ed Sept. 10, 1935 Gnarles n.

mesne assignments,

tion, New York, N. Y., a

xuzeu, claudine, Ariz., minor, Aby

to Phelps Dodge Corporacorporation of New applicati@ January s, 1933, serial No. 650,236 9 claims. (cI. 26a-4e) This invention relates to metallurgy and has provision of improved metalfor an object the lurgical apparatus. lvention contemplates More the The present application part of my application particularly, the inprovision of an imeratory furnace structure.

is a continuation in serial No. 496,884, med

October 24, 1930 (United StatesrPatent No.\l,896,-

178, issued February 7, i933) Reverberatory furnaces rare `un foundations embedded in upper usifally mounted the ground. The

surfaces of the foundations' are usually 4disposed at or slightly below the Vsurfacel of the ground which which the operating floor is nace chambers,

Iforms the operating floor or on supported. The furincluding the floors or bottoms,

usually extend substantially entirely above the The furnaces arej usually beams for supporting provi/ded with vertical I the side walls.

Each side of the furnace is provided with@ plurality of similarly spaced beams. The

pOints Slightly- .below beams extend from they ground line to points above the upper'surface of the roof. Th beams are wedged between the furnace walls and a concrete toe at the bottom-and tie rods extending transversely over the top of the furnace roof connect the beams at the top. structures or this type are semi-rigid and do not normally allow for expansion and contraction at the operating oor linedue to changes pressure within the furnace.

During'the course tions, considerable outward ously exerted against the l beams, and it frequently happens that the con`- of temperature and furnace 4operapressure is continu. owe;` ,portions of the crete toe, or the wedging' means between the toe and beam, tion of one or more of the wardly. Movement of the withdrawal of the support taining the wall in its proper shape and condition with the result that the wall is weakened vand bulges outwardly. Continued operation of a furnace in such condition view of the possibility Also, during the course of of` crumbling'and permitting the molten flow onto the operating floor.

crumbles and Apermits the lower porbeams to move out-l ,beams results in the necessary for mainis very dangerous in the weakened wall material to normal furnace operations, changesof temperature within'the'foundations or furnace'hearth or accretions thereon cause outward expansion against the foundation walls which is transmitted to external structures, such, under building columns an through the ground for example, as piers d the foundations of adjacent furnaces, with consequent danger to the stability of such external structures.

The present invention contemplates the provision of a reverberato bedded that movement l ry furnace structure comprising a foundation which is so spaced from the ground in which external structures may be emdue to expansion within the foundations willnot be transmitted to such external structures.

ment, the portions of might bef/affected by expan.

foundation which In the preferred arrangethe' walls of the furnace sion within the foundation hearth, etc. extend into space from theirsupporting structure, and they are free from contact, direct or indirect, with external formations or'structures.

The invention' further contemplates the provision of improved supporting means for furnace walls. The wall supporting means preferably' include resilient supporting members yielding resistance to which offer the movement of upright braces or beams whichbincl the side walls of the A preferred arrangement of apparatus includes a reverberatory furnacel means adjacent two oppos gas discharge opening centrally between theis disposed directly ab adjacent the gas discharge heating chamber of the cates with the interior of provided with firing in the roof substantially firing ends. A boiler plant ove the roof of the furnace opening,l and the boiler plant communithe furnace through a vertical flue surrounding the gas discharge opening.

'Ihe invention will ite ends and having a 25 be better understood from a consideration of the following description-vin conjunction withthe accompanying drawings, in

which Fig. 1

is a longitudinal elevation, partly in section, fof a. reverberatoryv furnace and superimposed boiler plant;

Fig. 2 is a' section taken\ substantially along "line 2-2 of Fig. l; and

Fig. 3 illustrates a method of tying-in the lower Y end portions of The reverberatory furnace ring means in the form ducing mixtures of air side wall supports.v

I0 isprovidedwith of burners and powdered coal into ythe vinterior of the furnace chamber at its two opposite ends. A gas di vided in the furnace firing ends.

scharge .opening I2 is proroof I3 midwaybetween the ,The furnace Walls are supported on a foundation consisting of lreinforced concrete Walls I4 provided with ledgesl beams or buck stays for supporting vertical I I for intro I5 which engage the' side 55 a portion of the furnace the rods 2| walls of the furnace. Short horizontal I-beams I6 having their ends loosely supported by brackets on the concrete foundation walls |4 and in recesses in the parallel concrete Walls or piers I1 provide supporting means for intermediate working platforms I8, from which repairs or other operations may be conducted. Movement of the foundation wall is not transmitted tothe piers I 1 through the beams I6. Each side wall of the furnace is provided with a plurality of similarly spaced vertical supporting beams I5, and the upper ends of opposite beams are connected by tie rods having threaded ends provided with suitable nuts to permit adjustment to compensate for expansion of the furnace area.

The lower end portions of the vertical beams are held in position against the furnace walls by means of the rods 2| each having one end anchored against a foundation wall I4 and the other end extendingto a point beyond the vertical supporting beams on the opposite side of the furnace. The rods 2| are encased in pipes 22 which extend through the foundation walls and the earth between the walls and which are of greater inside diameter than `the diameter of the rods. Theends of the rods 2| project into open spaces between the walls I4 and I1. The ends of are threaded and provided with nuts 23. A washer 24 is mounted on the lower end portion of each rod between the nut and the outer faces of a pair of spaced I-beams 25 the inner faces of which bear against a beveled surface on the foundation wall. A helical spring 26 is mounted axially on the upper end portion of each rod 2| between a washer 21 which bears against the nut and a plate 30 which bears against the outer faces of two parallel I-beams 3|. The inner faces of the I-beams 3| lie in contact with a beveled bearing plate 32 which extends between and bears upon two adjacent vertical beams I5 The tie rods 2| are disposed at such an angle and sufficient distances below the furnace bottom that they are not adversely affected by high temperatures within the foundation. The piers Il and the tie rods 2| are so formed and so arranged relatively to one another` that the tie rods may be withdrawn readily for repair and replacement. e

The furnace chamber in its roof and side walls gas discharge opening to a damper or curtain 34 is provided with slots 33 on opposite sides of the permit the insertion of for closing off one end to permit independent operation of the other end portion. The slots 33 may be wide expansion joints which are normally closed by suitable bricks or tiles 35. 'Ihe dampers use in any suitable metal casing provided with suitable connectlons for permitting circulation of water therethrough forms a suitable damper or curtain. The dampers may be suspended above the furnace by means of pulleys and cables (not shown). The slots and dampers may be of any the outer faces of A boiler plant consisting of two heating chambers 40 each having a standard make of boiler 4| mounted therein is mounted directly above the furnace on a frame structure 42 which straddles the furnace. The upright members of the frame structure 42 are supported by the concrete piers The heating chambers 40 are connected to the reverberatory furnace by means of a short vertical flue 43 which surrounds the gas discharge opening I2 in the roof ,of the furnace. Water cooled dampers 44 are provided for closing the heating chambers when necessary.

The reverberatory furnace illustrated in the drawings is, in effect, a double reverberatory and it may have a length equal to substantially twice the length of the normal furnace. The apparatus of the invention may include a reverberatory furnace having firing means at one end only instead of a furnace having ring means at two opposite ends.

I claim:

1. The combination with a reverberatory furnace of a supporting frame comprising a set of upright supports disposed on opposite sides of the furnace in contact with the side walls and supported upon a foundation, means for adjustably connecting the upper portions of said supports, and means for individually connecting the lower end portions of said upright supports to the foundation.

2. The combination with a reverberatory furnace of a supporting frame comprising a set of upright supports disposed on opposite sides of the furnace in Contact. with the side walls and supported upon a foundation, means for adjustably connecting the upper portions of said supports, and means for individually connecting the lower end portions of said upright supports yieldingly to the foundation.

3. Apparatus of the class described comprising a furnace chamber, a foundation for the furnace-chamber, an upright side wall supporting member, a tie rod anchored in the foundation and extending to a. point adjacent the upright supporting member, and a helical spring mounted on said tie rod and operatively associated with said upright support to afford yielding resistance to its movement.

4. Apparatus of the class described comprising a reverberatory furnace chamber, a foundation for supporting the furnace chamber, an upright side wall support having its lower end disposed adjacent the upper end ofthe foundation wall, an inclined tie rod anchored in the foundation adjacent the bottom thereof and extending to a point adjacent the upright support, and spring means mounted on said tie rod and operatively associated with said upright support to afford yielding resistance to its movement.

5. Apparatus of the class described comprising a reverberatory furnace chamber, a foundation for supporting the furnace chamber, an upright supporting member disposed in contact with one side wall of the furnace chamber and extending to a point adjacent the upper end of the adjacent foundation wall, and a tie rod having one end portion operatively associated with the lower end portion of the upright support and having its other end portion anchored against the opposite foundation wail.

6. Apparatus of the class described comprising a reverberatory furnace chamber, a foundation for supporting the furnace chamber, an upright supporting member disposed in contact with one yford yielding resistance to its movement.

7. The combination with a reverberatory furnace of a vertical beam engaging a side wall and supported upon a foundation,'adjustable means for limiting the movement of the upper end portion of the beam, and resilient means for individually fastening the lower end portion of the beam to the foundation.

8. A metallurgical furnace comprising side walls resting upon a foundation wall and heldin position by means of upright supports the lower end portions of which are adjacent to the foundation wall, and a tie rod for individually anchoring the lower end portion of each upright support to the adjacent foundation wall, one end of said tie rod being associated with the lower end portion of the upright support and the other end being anchored to the opposite foundation wall.

9. In a metallurgical furnace comprising side10 walls resting upon a foundation wall and heldin position by means of upright supports the lower end portions of which are adjacent to the foundation wall, and a tie rod for individually anchoring the lower end portion of each upright sup- 15 port to the adjacent foundation wall, one end of said tie rod being yieldingly associated with the lower end portion of the upright support and the other end foundation wall.

` CHARLES R. KUZELL.

being anchored to theopposite