US3888195A

US3888195A - Panelized suspended basic furnace roof

Info

Publication number: US3888195A
Application number: US464568A
Authority: US
Inventors: Levi S Longenecker
Original assignee: Individual
Current assignee: Individual
Priority date: 1973-08-02
Filing date: 1974-04-26
Publication date: 1975-06-10
Anticipated expiration: 1992-06-10

Abstract

An air-cooled and grout sealed-off refractory furnace roof is provided in the form of assembled panels having aligned rows of tile members that are handled as pallet groups to facilitate storage, shipping and furnace mounting. The panels are carried in a suspended relation from overhead metal structure by a vertical to horizontal extending assembly of metal hangers that include vertically supported cross-extending horizontal arms or yokes having secondary hanger members at each of their ends that are in the form of U-shaped members that are provided with spaced-apart latching slot portions along their opposed walls for detachably suspending tile-carrying hanger castings therefrom. A bottom closing member is associated with each U-shaped member which is mounted in such a manner as to lock the hanger castings in position within the latching slot portions. Diagonally or crossextending locking pins or rods are employed for tying the tile members of the rows together and for locking the hanger castings in position with respect to the tile members being suspended thereby. Filling material is used for sealing-off the joints between panels of tile members and over the upper surface of the roof assembly. This facilitates a circulatory movement of cooling and dust removing air along the upper reaches of the assembled tile members.

Description

[ June 10, 1975 United States Patent [191 Longenecker 1 PANELIZED SUSPENDED BASIC FURNACE ROOF [76] Inventor: Levi S. Longenecker, 61 Mayfair Dre, Pittsburgh, Pa. 15228 [22] Filed: Apr. 26, 1974 211 App]. No.: 464,568

Related U.S. Application Data Primary Examiner-John J. Camby Attorney, Agent, or Firm-Parmelee, Miller, Welsh & Kratz ABSTRACT An air-cooled and grout sealed-off refractory furnace roof is provided in the form of assembled panels having aligned rows of tile members that are handled as pallet groups to facilitate storage, shipping and furnace mounting. The panels are carried in a suspended relation from overhead metal structure by a vertical to horizontal extending assembly of metal hangers that include vertically supported cross-extending horizontal arms or yokes having secondary hanger members at each of their ends that are in the form of U-shaped members that are provided with spaced-apart latching slot portions along their opposed walls for detachably suspending tile-carrying hanger castings therefrom. A bottom closing member is associated with each U- shaped member which is mounted in such a manner as to lock the hanger castings in position within the latching slot portions. Diagonally or cross-extending locking pins or rods are employed for tying the tile members of the rows together and for locking the hanger castings in position with respect to the tile members being suspended thereby. Filling material is used for sealing-off the joints between panels of tile members and over the upper surface of the roof assembly. This facilitates a circulatory movement of cooling and dust removing air along the upper reaches of the assembled tile members.

24 Claims, 26 Drawing Figures 33b 34 ,33ct 33 l 35 37 r a? 38 as as To 36 38 2o 40 PATENTEDJUN 10 I975 SHEET Fig. 2B

Fig. 3

A 5 c 0 00'5 A PATENTEDJUH 10 1975 F ig. ll

Fig. 10

PATENTEDJUH10r975 Fig. 16

FATENTEDJUH 10 ms I llllllllLllHllll ggss Illl

fFlllllllJlIll] PANELIZED SUSPENDED BASIC FURNACE ROOF This application is a continuation in part of my copending application Ser. No. 385.083, entitled Panelized Suspended Furnace Roof and Improved Feed Hole, filed Aug. 2, I973. now U.S. Pat. No. 3.825.409.

BACKGROUND OF THE INVENTION l. Field of the Invention This invention pertains to an improved suspended roof and one in which isolation of the metalwork is enhanced and that employs an improved panelized detachable suspension of refractory tile members. A phase of the invention relates to the sealing-off and crossintegrating of refractory tile members used in the construction.

2. Description of the Prior Art In my US Pat. No. 3,789,780 I have illustrated how a panelized assembly of tile members may be utilized in mounting them in a suspended relation from a crossextending support beam member, and have additionally illustrated the employment of a single relatively short-length horizontally extending foot member that is carried by the lower end of a gooseneck hanger to, in turn, carry a pair of rows of hanger castings therealong which directly suspend tile members therefrom.

There has been a continued need for further simplication in the handling of tile members and their utilization in the form of panels and, at the same time, for enabling an improved suspending of fully supported tile members from each gooseneck hanger in such a manner as to maximize the strength of the rows therealong and provide a better integration of the tile members of each panel. Further. there is a need for a sealed type of roof construction that will facilitate efficient, continuous movement of cooling and dirt picking up air over its upper reaches and that, as constructed, will provide compressible expansion joints between tile member panels. The present invention also deals with providing an improved structure for a high temperature melting furnace that will be leakproof, will provide a good degree of insulation against heat loss, and that is flexible in its installation.

SUMMARY OF THE INVENTION It has thus been an object of the present invention to develop a suspended roof construction which not only minimizes the expense of installation, but provides maximum flexibility of installation, operation and repair.

Another object has been to further facilitate the panelizing of refractory tile members for handling, stor age and shipping purposes.

Another object of the invention has been to provide practical means of interlocking tile members of panelized rows together. as well as for locking hanger castings in a latched tile-supporting relation.

A further object has been to enable a balanced maximization of the number of tile rows that may be suspended from each overhead post, gooseneck or tertiary hanger member.

A still further object has been to provide a mounting of refractory tile members that will facilitate making a roof leakproof and with a good degree of insulation against heat loss.

These and other objects will appear to those skilled in the art from the illustrated embodiment and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a fragmental side view in elevation of a portion of a furnace roof constructed in accordance with the invention, and utilizing a horizontally positioned box-like or inverted U-shaped, plate-like member along each end portion of a centrally hanger-supported, short-length, cross-extending, yoke member;

FIG. 2 is a fragmental end view in elevation of the structure of FIG. I, taken at right angles thereto. The tile members are shown assembled in a series of rows that are given alphabetical numbering to characterize the assembled relation of a panelized assembly, such as illustrated in FIGS. 10, 11, I2, and 13;

FIGS. 2A and 2B are enlarged horizontal sections taken respectively along the lines llA-IIA and Il- BIIB of FIG. 2',

FIG. 3 is a top plan view on the same scale as FIGS. 1 and 2 showing a unitized panel assembly of refractory tile members, and for clarity members of the overhead framework are omitted. It primarily illustrates the use of a yoke-like arm member and its endwise-positioned, horizontally extending pair of hanger supporting members;

FIG. 4 is an enlarged side view in elevation of a primary hanger or hanger casting for carrying a row of tile members in a wide face abutting suspended relation;

FIG. 5 is an end view in elevation on the same scale as FIG. 4 further illustrating the hanger casting;

FIG. 6 is a top plan view and FIG. 7 is a bottom plan view of the hanger on the scale of FIGS. 4 and 5',

FIGv 8 is an enlarged fragmental end section taken along the line VIII-VIII of FIG. 4;

FIG. 9 is a side perspective view in elevation on the scale of FIGS. 4 to 8, inclusive, showing the construction of a refractory tile member employing the invention and as adapted to receive a pair of latching leg and foot parts of an associated primary hanger casting in a manner such as illustrated in FIGS. I7 to 19, inclusive:

FIG. 10 is a greatly reduced side view in elevation showing a palletized assembly of refractory tile members from their narrow side faces that is banded both horizontally and vertically;

FIG. 11 is a fragmental top plan view on the scale 01 FIG. 10 and of the same panel;

FIG. 12 is a side view in elevation on the scale of an: similar to FIG. 10, but illustrating a further type of pal letizing in which hanger castings are assembled with the panel thus necessitating the elimination of the vertica banding members;

FIG. 13 represents an end view in elevation on th scale of FIG. 12 and showing the same palletized as sembly of tile members from their wide side faces witl hanger castings in position. In this figure, the type 0 assembly of tile members will apply equally to the con struction of FIG. 10, but with the deletion of the hange' castings and the addition of vertical strap members il lustrated in FIG. 10;

FIG. 14 is a side perspective view in elevation of: plate-like bottom closure member having upturned Sldl flanges of channel shape that serve to close-off tht member of FIG. 15 and to additionally enable a lockin of hanger castings in position within the latter membe as illustrated in FIG. 16;

FIG. I5 is a view similar to and on the same scale as FIG. 14 but illustrating the construction of a box-like, inverted U-shaped or channel-shaped secondary hanger or supporting member for suspending a row of hanger castings along each of its pair of opposed side or flange walls in a latched relation with respect thereto as particularly illustrated in FIG. I6,

FIG. 16 is a fragmental side section in elevation on an enlarged scale with respect to FIGS. I4 and I5, and showing an assembly of supporting members including those illustrated in FIGS. 14 and I5;

FIGS. 17 and 18 are enlarged fragmental end views in elevation on the scale of FIG. 9, illustrating rotational mounting of a primary hanger or hanger casting within an aligned row of wide side faces abutting tile members while, for example, they are being retained in an assembled relation as a panel on a pallet, such as illustrated in FIGS. 12 and 13;

FIG. I9 is a fragmental end view in elevation on the same scale as FIGS. 17 and 18 and taken at right angles thereto showing the parts in the same position as illustrated in FIG. 18:

FIG. 20 is a fragmental end section in elevation on the scale of FIGS, 17 and 19 illustrating the use of insu' lating blocks, filling mortar, joint sealing, and an overhead or top extending layer of grouting;

FIG. 21 is a reduced end view in elevation of a panel assembly of a type illustrated generally in FIG. 13, but on a large scale with respect thereto. This view particularly illustrates a complete panelized assembly which has been enclosed by a skirt of china clay or hydrated aluminum silicate, and with its upper surface coated with a layer of about one-eighth or one-fourth inch of grout. The tiles of each row are shown integrated or locked together by the utilization of through-extending latching hole portions and cooperating latching pins or rods;

FIG. 22 is a fragmental side view in elevation on the scale of FIGS. 1 to 3 illustrating the use of metal sealing buckets or bowl-like elements to provide an enclosed air circulation area about the upper reaches of an assembled roof of refractory tile members;

FIG. 23 is a greatly reduced transverse end view in elevation illustrating a complete air circulation system for a roof constructed in accordance with the invention;

And, FIG. 24 is a fragmental side view on the same scale and of the same system as shown in FIG. 23.

DESCRIPTION OF THE PREFERRED EMBODIMENT As shown particularly in FIGS. 1 and 2 of the drawings, the suspended furnace roof of the invention may be carried or mounted on transversely extending and spaced-apart main support girders of an overhead metal framework through the agency of relatively short-length, overhead support beams 11 that extend longitudinally of the furnace and that removably rest on the girders 10 for maneuvering into and out of a right-angular, fully mounted positioning thereon. Short length I-beam pieces 12 serve as risers for the beam members I] and rest upon the lower flange of the girders l0. Panels of refractory tile members 22 are carried by tertiary hangers 30 of a gooseneck or post hanger type that are suspended from an associated, longitudinally extending, beam member I] through the agency of an upper, hook-nose shaped latch part 3] thereof.

The latch part 31, as particularly shown in FIG. 2A, may be a casting provided with a backwardlyextending. T-shaped portion 31b that is adapted to fit in the spacing between opposed flange leg portions of a pair of vertically extending angle pieces or members that provide the tertiary hanger 30. As also shown. the latch part 31 has an eyelet or cross-extending open por' tion 31a to receive the book of an overhead hoist or crane. Bolt and nut assemblies 32 are employed for se curing the part 31 in position between the two angle pieces of the hanger to project horizontally backwardly therefrom. As shown particularly in FIGS. 1 and 2, the hook-nose part 31 is adapted to rest upon and latch over an upper flange of an associated support beam member I].

The lower end of the tertiary hanger 30 is shown provided with a connector casting 33 which, as particularly illustrated in FIG. 2B, has a horizontal bottom flange or foot 33a that is weld-secured in a centrally balanced position, as shown in FIG. 3, to the web of a horizontally cross-extending, I-beam shaped, short-length arm or yoke member 35. The connector casting 33 also has a fowardly projecting T-shaped mounting portion 33b whose web extends between the pair of angle pieces that provide the hanger 30, and its flange is adapted to abut against flange feet of the channel members (see FIG. 28). Each bottom connector casting 33 is secured to the body of the hanger 30 by bolt and nut assemblies 34 and has a pair of vertically extending triangular shaped reinforcing side wings 33c that project up wardly from its bottom flange or foot 33a.

The short length yoke or arm member 35 extends with its web portion on a horizontal plane from opposite sides of the bottom connector 33 (see FIG. 2) and, at or adjacent its opposite ends, carries a pair of hanger supporting members 38 in a horizontally positioned and spaced-apart relation with respect to each other, through the agency of pairs (see FIGS. I, 2 and 3) of angle-shaped connector ears or wings 36. It will be noted (see FIG. 3) that each wing pair 36 projects from a side flange of the member 35 in a directly opposed relation with another pair 36 at the same end portion of the member 35 to receive and carry an upwardly projecting leg or web portion of a horizontally extending, inverted T-shaped, hanger-supporting, structural mem' ber 38. Each support member 38 is removably carried by a pair of the wings 36 by means of a cotter pin assembly 37. As illustrated particularly in FIG. 2, the in verted Tshaped structural members 38 are of a relatively short length, corresponding substantially to the length extent of a panel of refractory tile members 22 across what may be termed their maximum width di mension, as represented by an aligned row of narrow face abutting tile members. See tile members A, B, C. D, D, C, B and A of FIGS. 2 and 3.

Secondary hanger members 40 are provided of platelike construction that have an inverted-U or box-like shape. As illustrated particularly in FIGS. 1 and 2, the secondary hangers 40 are of the same length as an associated support member 38, and each is suspended from an associated support member 38 by welding its upper connecting wall or web portion to the underside of the foot or flange portion thereof. The spaced-apart flange or side walls of each hanger 40 are in an opposed verti cally extending, space-apart relation with respect to each other, and are provided with (see particularly FIG. 15) latching slot portions 40b of horizontally elongated, rectangular shape. The open bottom side of each member 40 is closed-off by an associated bottom closure member 41, also of platelike construction. The closure member 41 is of channel shape, having upwardly extending, opposed side flanges that are adapted, as shown in FIG. 16, to slidably interfit be tween the side flanges or wall portions of an associated hanger member 40 and to be secured in position through the agency of bolt and nut assemblies 42. The assemblies 42 extend through aligned hole portions 40a in the

member

40 and 41a in the member 41. The

members

40 and 41 thus form a complete rectangular box-like hanger assembly. At the same time, the member 41 serves to lock an upper latching or hook end portion 46 of a primary hanger or hanger casting 45 in position within an associated latching slot portion 40b. As will be apparent, the

members

38 and 40 serve as a supporting member construction for primary hangers 45. Each member 40, as shown in FIG. 16, is adapted to suspend a pair of spaced-apart aligned rows of hangers 45 therefrom.

The construction of primary hangers or hanger castings 45 is particularly illustrated in FIGS. 4 to 8, inclusive. Each hanger 45 has a centrally disposed, upwardly extending, hook or latching end portion 46, a longitudinally extending, connecting shoulder 47, and a pair of end legs 48 of half section and intermediate full section legs 50, as carried and projecting downwardly in a spaced relation from and along the shoulder 47, The legs 48 terminate in what may be termed end or half feet 49 and a tapered bottom portion 49a. In a like manner, the full section leg members 50 terminate in a full width, cross-extending foot 51, each half of which has a tapered bottom portion 51a that defines a rounded, cross-extending recess 5 lb which serves an as open guide slot for bypassing a latching pin or rod 52, such as shown in FIGS. 18 and 19.

The construction of the refractory tile or block members 22 is particularly illustrated in FIG. 9. Each tile member is shown as having a pair of opposed, vertical, wide side faces 22a and 22b and a pair of opposed, vertical, narrow side faces 22c and 22d as surmounted by an upper face 22e. Each tile member 22 has a recessed ledge portion 23 that lies on a horizontal plane parallel to the upper face 22e and is downwardly offset with respect thereto, The portion 23 serves as an entry recess for a latching leg and foot portion of a hanger casting 45 as introduced from front, narrow side face 22c and its cross-extending sloped or beveled, lip entry portion 23a. A vertical riser portion 23b extends in a planar re lation at right angles from the back end of the ledge portion 23 to terminate at the top face 226.

A transversely elongated, latching slot portion 24 is provided on each

wide side face

220 and 22b being open thereto and also open to the ledge portion 23 and to an upwardly extending, legreceiving slot portion 25. As shown in FIG. 9, there is a latching slot portion along each wide side face that is open to an associated latching portion 24, to the front ledge portion 23b and to the upper face 22. A backwardly declining ledge 240 (see FIG. 17) that extends from the riser portion 23b and above the latching slot portion 24 serves to guide the entry of the foot portion of a hanger casting into the latching slot portion.

FIGS. 17 and 18 illustrate how the foot and leg portions of a hanger casting 45 are rotated into position within a latching slot portion 24 for suspending tile member 22, as illustrated in FIGS. 18 and 19. Each tile member 22a is also shown provided with a pair of sidepositioned, backwardly declining or sloped, offset. entry portions 26 for facilitating bypassing of an enter ing foot portion, such as 49 of a hanger casting 45. See the dot and dash line position of FIG. 17.

FIGS. 17, 18, 19 and 21 illustrate the provision and use of so-called latching hole portions that project or incline diagonally between adjacent tile member 22 of a row of tile members taken along their aligned and abutting narrow side faces. Basically, for integrating such a line or row of tile members 22 in a connected relation with respect to each other, a latching hole portion 27 may extend from at least one and preferably from both its latching slot portions 24. The hole portion 27, as particularly shown in FIGS. 18 and 19, may extend along one side face 220 of one tile member 22 as a half hole portion to, with a half a hole portion of an aligned wide face 221) of an abutting tile member 22, define a split latching hole portion along which a lock ing pin or rod, such as 52, may be inserted. The rod 52 may be inserted after the hanger casting 45 has been rotated first into a latching, fully vertically extending position (shown in FIGS. 18 and 19). An upper head or angle-shaped end portion 52a of the rod may engage a foot portion, such as 4) or 51 of a hanger casting, to hold its latching position. The pin or rod 52 also extends from the back narrow side face 22d of the one tile member 22 into an extension hole portion 270 that projects from the narrow front side face 22c of an adjacent tile member 22. That is, the hole portion 270 projects from the front narrow side face 22c of the next backwardly positioned tile member 22 and is endwisealigned with the open portion 27 of the forwardly positioned one tile member 22 to, with the pin or rod 52, thus integrate the two tile members with respect to each other.

Locking pins or rods 53 without head or turned-over end portions may also be used as shown in FIG. 21. They do not extend from a latching slot portion 24, but merely extend diagonally, either as a full size hole por tion from one narrow side face of a tile member into and diagonally within and along the body of or as half size hole portions along a wide side face of one or more corresponding tile members that have endwise-aligned hole portions. In this connection, see the

hole portions

27b, 27c and 27d of FIG. 21. Also, as shown in this FIG- URE, the latching hole portions 27 that start at a latching slot portion 24 of one tile member may extend into and through a plurality or group of tile members, see 27e.

FIGS. 20 and 21 also illustrate how panel assemblies may be formed as sealed-off units to provide a leakproof furnace roof. As shown particularly in FIG. 20, mortar 55 may be used for filling the latching slot portions 24 about the

feet

49 and 51 of the hanger castings 45, and a layer may be extended along the recessed ledge portion 23 and to fill the spacing left by the front beveled portion 23a. A filling insulating block or pad 56, such as of asbestos material, may then be placed to fill up the recess ledge portion 23 with its top level with the upper face 22e. At this time as shown in FIG. 21, the panel or assembly of tile members may be held together by a horizontal steel or metal band 28 which may be left in place while encircling the blocks with an insulating board-like skirt or enclosure 58. The skirt 58 may be ofa suitable somewhat flexible insulating material, such as a commercial Kaolin type of china-clay or hydrated aluminum silicate material having a high melting point.

After the skirt 28 has been pasted or otherwise se cured in position about the banded, panelized group of tile members, then a top sealing surface is applied using a clay grout that is thin enough to penetrate the tile or brick joints and to a depth to form an upper coating 57 of about one-fourth to one-eighth of an inch in thickness. The tile members of a panel thus sealed provides a leakproof assembly and as nested together with other panels to form a suspended roof. The skirt 58 of the panels will positively seal their joints and provide for expansion and contraction. The roof may be used for a high temperature melting furnace due to its leakproof construction and the fact that a good degree of insulation against heat loss is attained. The skirt 58 may be of a suitable thickness for attaining a desired amount of expansion; a thickness of about three-eighths to onehalf of an inch has been found to ordinarily be sufficient. The skirt 58 also provides a side support for the grout coating 57.

The insulating blocks 56 not only fill the latching slots or notches 24, but also to help reduce heat loss, and since they are of short extent from the standpoint of the overall depth of each tile member 22, an excessive or harmful temperature build-up is avoided with reference to the hanger castings 45. Since the tile tops are in effect uncovered, both such tops and the legs of the hanger castings provide surface exposure for requisite effective cooling. The construction eliminates the need for punched metal plates for protecting sides of individual tile members, provides a leakproof construction. It makes possible the practical utilization of 12 inch tile members without plates in a high temperature furnace that is economical and of light weight, and that enables a highly satisfactory control of heat loss. It eliminates conventional steel plates that are used with chemically bonded brick and which entail a much greater heat loss.

With reference to FIGS. 10, ll, 12 and 13, tile mem' bers 22 may be assembled at the brick or tile factory in a group or assembly consisting of tile rows extending at right angles with respect to each other, with one type of row alignment represented by tile members thereof in an abutting wide face to wide face aligned relation, such that hanger castings may be rotated into a latching position within their latching slot portions from their front narrow side faces. Each hanger casting may thus be rotated simultaneously into a latching position within a group of tile members of the row. The other type of row alignment involves tile members in a narrow face to narrow face aligned relation. Tile members of the row may be integralized by the employment of aligned latching hole portions and associated latching locking pins or rods.

A panelized assembly of tile members 22 may be formed on a planar floor or platform 21 of a pallet 20, and may correspond in size to that of a suitable shipping and storing pallet, such as 3 feet by 4 feet. As shown in FIG. 10, the tile members 22 may then be secured as a panel assembly on the pallet 20 through the agency of a peripherally extending, horizontal, steel banding strip 28 and one or more vertical steel banding strips 29. Although it is preferable to, at the factory, merely panelize and assemble the tile or brick members for storage and shipment and subsequent furnace roof mounting. it has also been tound possible to insert the hanger castings 45 in a latched position within the assembly before shipment. In such an event, care has to be taken to avoid striking the projecting hook portions of the hangers to avoid damaging the refractory tile. In any event, whether at the tile factory or at the furnace site, the hanger castings 45 are inserted by rotating them into position within the latching slot portions 24 of cooperating tile members 22 while such members are still in a panelized assembly, and held in such an assembly by a horizontal banding member 28 in a manner such as illustrated in FIGS. 12 and I3. Thereafter, the skirt 58 (see FIG. 21) may be applied. It is preferable to add the mortar 55, blocks 56 and grouting 57 after the panels have been installed in the roof and their sup porting pallets 20 removed. FIGS. 10 and I] of my pre viously mentioned US. Pat. No. 3,789,780 show how individual panels may be moved into position by an overhead crane or hoist and then suspended from an associated support beam 11 by a primary or post hanger such as 30.

With reference to FIGS. 22, 23 and 24, a system for cooling the metalwork and cleaning the upper reaches of the refractory roof construction is shown. A fresh air blower 60 supplies cooling air under positive pressure through an overhead manifold 61 and U-shaped

horizontalwertical pipe assembly

62, 63 in a lengthwise extending relation with respect to the furnace and as supported by the girders 10. FIG. 23 shows two vertical positive pressure flow air feed pipes 63 for supplying cooling air downwardly, as indicated by the arrows, into a substantially closed-off area immediately above the upper ends of the refractory tile members 22. The cooling air flows over and along the upper ends of the tile, and after picking-up dirt or dust is removed as a warmed, contaminated suction flow through vertically extending air pick-up or collector pipes 64 which extend transversely of the furnace. The return flow of air is then introduced into an overhead air collecting duct 65 which discharges into an overhead manifold 66 that extends parallel to the beam members 1], at right angles to the main support girders l0 and thus, at right angles to the input portion of the air system. The warmed, dirty air is drawn from the overhead manifold 66 by a suction blower 67 into a dust recovery unit 68 (shown in FIG. 24). The cleaned air may then be cooled and introduced into the manifold 61 and along the upper reaches of the furnace tile for repeating the cycle, or may be introduced into the furnace to support combustion therein.

As shown particularly in FIG. 22, downwardly concavely shaped. dish or bucketlike, flanged metal bowl members 70 are adapted to rest on the bottom flanges of the T-bars or members 38 to close-off the spacing immediately above the upper reaches of the tile members 27 in cooperation with the

box member assemblies

40, 41 and other closure members. In FIG. 24, the air collecting manifold 66 is shown hung below the cross girders 10 adjacent the furnace feed holes, and the pick-up ducts 64 are shown located under the cross girders 10. It has been determined that effective air cooling employing a sealed roof construction will at least double the life of a suspended roof. The tight sealing effected by the use of cover plates eliminates dirty roof problems that tend to cause burning out of castings. The use of a rotary type of furnace door, such as set forth and claimed in my co-pending application Ser.

No. 385,083. will provide a furnace roof that is substantially fully leakproof. The flow of cooling air within upper area isolating cover plates enables the collection and elimination of air contaminants. such as sulphur, improves the life of the furnace roof. and enables the use of the warmed air for furnace combustion pur poses.

I claim:

1. ln an improved panelized suspended furnace roof construction for mounting on an overhead metal framework having spaced-apart substantially horizontally extending support members, downwardly extending post hanger members detachably suspended along the support members, a cross-extending yoke member carried by a lower end portion of each of said post hanger members, a pair of hanger supporting members suspended in a horizontally extending and spaced-apart relation with respect to each other from adjacent opposite ends of each of said yoke members, row pairs of tile-supporting hangers removably carried by said supporting members, and each of said hanger supporting members extending transversely with respect to its as sociated said yoke member and having a pair of spacedapart latching portions therealong each of which is adapted to carry a row of said row pairs of tilesupporting hangers.

2. A furnace roof as defined in claim 1 wherein, each of said hanger supporting members comprises a box like member whose latching portions are latching slot portions along its opposite side walls, and said row pairs of tile-supporting hangers are adapted to engage within said latching slot portions.

3. A furnace roof as defined in claim 2 wherein, a group of cooperating tile members is suspended by said hangers in tile rows along opposite side walls of each of said box-like members.

4. A furnace roof as defined in claim 1 wherein, structural members are secured to extend in a substantially right-angular relation from each of the opposite ends of each of said yoke members, and each of said hanger supporting members is secured to extend downwardly from an associated one of said structural members.

5. A furnace roof as defined in claim 4 wherein, each of said hanger supporting members is a channel-shaped member having its opposed side walls extending downwardly and having its connecting back wall secured to the associated one of said structural members.

6. A furnace roof as defined in claim 4 wherein, each of said structural members is an inverted T-shaped member having its leg suspended from an adjacent end portion of the associated said yoke member and having its bottom flange secured to carry an associated said hanger supporting member.

7. A furnace roof as defined in claim 5 wherein, each said channel-shaped member has latching slot portions in a spaced-apart relation along its opposed side flanges for receiving said tile-supporting hangers as row pairs therealong.

8. A furnace roof as defined in claim 4 wherein, each member of said pair of structural members is of inverted T-shape, and means is provided for detachably suspending said T-shaped members adjacent opposite ends of each of said yoke members.

9. A furnace roof as defined in claim 8 wherein, said detachable suspending means is a pair of wings carried by each end portion of each of said yoke members, and

a pin extends through each said pair of wings for mounting the leg of an associated one of said pair of T- shaped members therebetween.

10. A furnace roof as defined in claim 8 wherein, said pair of hanger supporting members includes a pair of members of inverted U-shape, each having its connecting upper wall secured to the bottom flange of an associated one of said T-shaped members, and each having latching slot portions along at least one of its pair of spaced-apart vertical side walls to receive and carry a row of said tile-supporting hangers therealong.

11. A furnace roof as defined in claim 7 wherein, a group of tile member rows is carried by said tilesupporting hangers along the opposed side flanges of each of said channel-shaped members, and the tile members of each row are in a wide face abutting relation with respect to tile members of adjacent rows,

12. An improved furnace roof as defined in claim 7 wherein, a bottom closure member is provided for each of said channel-shaped members that is adapated to slidably interfit with the opposed side walls thereof, and means for securing said bottom closure member in position on its associated said channel-shaped member.

13. An improved furnace roof as defined in claim 12 wherein, each said bottom closure member has side portions cooperating with said latching slot portions for retaining said tile-supporting hangers in a latched position within said slot portions.

14. An improved furnace roof as defined in claim 7 wherein, a pair of spaced-apart wing-shaped members are secured to project downwardly adjacent opposite ends of each of said yoke members, an inverted T- shaped member has its leg removably secured between an associated pair of said yokes, and each of said channel shaped members has its connected web secured to the underside of an associated said T'shaped member.

15. An improved furnace roof construction as defined in claim 1 wherein, each of said hanger supporting members is of open-bottom box-like shape and has latching slot portions along its opposite side walls to detachably receive said tile-supporting hangers therein, and a closure member is adapted to interfit with each of said box-like members to close-off the bottom side thereof and retain said hangers in a latched relation with respect to the associated said box-like supporting member.

16. An improved furnace roof construction for mounting on an overhead metal framework having spaced-apart endwise-carried support beams extending across the roof which comprises, downwardly extending tertiary hangers mounted in a suspended relation on and along the support beams, each of said tertiary hangers having a vertical leg terminating at its lower end in a transversely extending arm, said arm terminating at its opposite ends in a cross-extending flanged member, the flanged members at opposite ends of said arm extending in a spaced-apart substantially horizontally parallel relation with respect to each other, a secondary hanger assembly carried by each of said flanged members and extending therealong, and tile-supporting primary hangers carried in rows by each of said secondary hanger assemblies.

l7. In a handling assembly for installing refractory tile members on an overhead support member, a pallet having a substantially planar floor, refractory tile members, each of said tile members having a pair of opposed relatively wide side faces and a pair of opposed relatively narrow side faces, said tile members being positioned in an upright relation on the floor of said pallet in the form of aligned rows in which each row has its tile members in a wide side face-abutting relation with each other, the tile members of each of said rows having their narrow side faces in an aligned and abutting relation with respect to tile members of adjacent rows, banding means for retaining the tile members in the defined positioning on the floor of said pallet, each of said tile members having an upwardly and forwardly open recess portion at its upper end that is open to one narrow side face and that terminates in a latching portion that is forwardly-open thereto and sidewise-open to a wide side face of the tile member, a group of metal primary hangers; each of said primary hangers having a transverse shoulder, an upwardly projecting suspending part, and a spaced-apart group of downwardly projecting latching leg and foot parts, and said latching parts of each of said hangers being adapted to be moved into latching engagement with the latching portions of adjacent tile members of a wide side faceabutting row by rotating each of said hangers through said recess portions into said latching portions while said tile members are being retained in position with respect to each other on said pallet.

18. A handling assembly as defined in claim 17 wherein, each of said tile members has a latching hole portion extending from its said latching portion towards a backwardly located narrow side face thereof, and a locking pin is inserted in said hole portion after one of said hangers has been mounted in position within said latching portion for retaining the foot portion of said hanger therein.

19. In a handling assembly as defined in claim 18 wherein, said latching hole portion extends through the backwardly located narrow side face of each said tile member, an extension hole portion extends from a frontwardly located narrow side face of an aligned tile member of an adjacent row in endwise-alignment with said latching hole portion to receive an extending end portion of said locking pin therein.

20. In an improved furnace roof construction for mounting on an overhead metal framework, refractory tile members provided with latching slot portions for suspending them, hanger castings having foot portions to latch-engage within said latching slot portions for suspending said tile members in face to face aligned tile rows from the metal framework, a latching hole portion extending in an inclined plane from one of said refractory tile members into an endwise-aligned relation with a latching hole portion extending in an inclined plane within an adjacent tile member, and a locking pin positioned to extend from the latching slot portion of said one tile member along its said latching hole portion into and along said latching hole portion of the adjacent tile member for securing them in an aligned relation with respect to each other.

21. An improved furnace roof construction as defined in claim 20 wherein, said locking pin has an upper end portion adapted to engage the foot portion of the hanger casting that suspends said one tile member for retaining said hanger casting within the latching slot of said one tile member.

22. An improved assembly of refractory tile members as defined in claim 20 wherein, additional endwisealigned hole portions diagonally extend across between and into adjacent tile members, and locking pins are positioned to extend along the lengths of said endwisealigned hole portions for retaining said tile members in a secure relation with respect to each other.

23. In an improved furnace roof construction as defined in claim 20, a banding strip extending about said rows of tile members for retaining them in position with respect to each other, a skirt of refractory material extending about outer side faces of the banded rows of said tile members, insulation and mortar means filling said latching slot portions of said tile members, and a layer of grout covering upper end faces of said tile members.

24. In an improved furnace roof construction as defined in claim 16 having refractory tile members suspended by said primary hangers therebelow to cover the roof of the furnace, means for substantially closingoff an immediate area above the upper ends of the suspended tile members and said primary hangers to de fine an air circulating chamber therealong, an overhead manifold and vertical feed pipe means extending therefrom and open at its lower ends to said air circulating chamber, means associated with said overhead mani fold for supplying cooling air under positive pressure to said chamber, a plurality of air return ducts spaced along and open to said chamber, an overhead air collector manifold for receiving dirt-containing warmed air from said return ducts, means associated with said collector manifold for drawing the dirt-containing warmed air under negative pressure from said cham ber, and means associated with said collector manifold for separating-out dirt from the warmed air before it is discharged therefrom.

Claims

1. In an improved panelized suspended furnace roof construction for mounting on an overhead metal framework having spaced-apart substantially horizontally extending support members, downwardly extending post hanger members detachably suspended along the support members, a cross-extending yoke member carried by a lower end portion of each of said post hanger members, a pair of hanger supporting members suspended in a horizontally extending and spaced-apart relation with respect to each other from adjacent opposite ends of each of said yoke members, row pairs of tilesupporting hangers removably carried by said supporting members, and each of said hanger supporting members extending transversely with respect to its associated said yoke member and having a pair of spaced-apart latching portions therealong each of which is adapted to carry a row of said row pairs of tile-supporting hangers.

2. A furnace roof as defined in claim 1 wherein, each of said hanger supporting members comprises a box-like member whose latching portions are latching slot portions along its opposite side walls, and said row pairs of tile-supporting hangers are adapted to engage within said latching slot portions.

9. A furnace roof as defined in claim 8 wherein, said detachable suspending means is a pair of wings carried by each end portion of each of said yoke members, and a pin extends through each said pair of wings for mounting the leg of an associated one of said pair of T-shaped members therebetween.

11. A furnace roof as defined in claim 7 wherein, a group of tile member rows is carried by said tile-supporting hangers along the opposed side flanges of each of said channel-shaped members, and the tile members of each row are in a wide face abutting relation with respect to tile members of adjacent rows.

14. An improved furnace roof as defined in claim 7 wherein, a pair of spaced-apart wing-shaped members are secured to project downwardly adjacent opposite ends of each of said yoke members, an inverted T-shaped member has its leg removably secured between an associated pair of said yokes, and each of said channel-shaped members has its connected web secured to the underside of an associated said T-shaped member.

17. In a handling assembly for installing Refractory tile members on an overhead support member, a pallet having a substantially planar floor, refractory tile members, each of said tile members having a pair of opposed relatively wide side faces and a pair of opposed relatively narrow side faces, said tile members being positioned in an upright relation on the floor of said pallet in the form of aligned rows in which each row has its tile members in a wide side face-abutting relation with each other, the tile members of each of said rows having their narrow side faces in an aligned and abutting relation with respect to tile members of adjacent rows, banding means for retaining the tile members in the defined positioning on the floor of said pallet, each of said tile members having an upwardly and forwardly open recess portion at its upper end that is open to one narrow side face and that terminates in a latching portion that is forwardly-open thereto and sidewise-open to a wide side face of the tile member, a group of metal primary hangers; each of said primary hangers having a transverse shoulder, an upwardly projecting suspending part, and a spaced-apart group of downwardly projecting latching leg and foot parts, and said latching parts of each of said hangers being adapted to be moved into latching engagement with the latching portions of adjacent tile members of a wide side face-abutting row by rotating each of said hangers through said recess portions into said latching portions while said tile members are being retained in position with respect to each other on said pallet.

22. An improved assembly of refractory tile members as defined in claim 20 wherein, additional endwise-aligned hole portions diagonally extend across between and into adjacent tile members, and locking pins are positioned to extend along the lengths of said endwise-aligned hole portions for retaining said tile members in a secure relation with respect to each other.

24. In an improved furnace roof construction as defined in claim 16 having refractory tile members suspended by said primary hangers therebelow to cover the roof of the furnace, means for substantially closing-off an immediate area above the upper ends of the suspended tile members and said primary hangers to define an air circulating chamber therealong, an overhead manifold and vertical feed pipe means extending therefrom and open at its lower ends to said air circulating chamber, means associated with said overhead manifold for supplying cooling air under positive pressure to said chamber, a plurality of air return ducts spaced along and open to said chamber, an overhead air collector manifold for receiving dirt-containing warmed air from said return ducts, means associated with said collector manifold for drawing the dirt-containing warmed air under negative pressure from said chamber, and means associated with said collector manifold for separating-out dirt from the warmed air before it is discharged therefrom.