US1946083A - Furnace wall - Google Patents

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. LAMBIE FURNACE WALL Feb. 6, 1934.

Filed May 6, 1933 INVENTOR Patented Felt), 6 31954 il tl ldullii l IULB WAGE James M, Laniliie, W

Findlay Ulay Comps lPa a corporation of Penne Application May 8 19330 Noa ceases invention relates to furnace walls, and more "s and the like,

"that is called the flux wall, composed of blocks which make up the lower portion of furnace and actually contain the glass, of course, has much shorter life than the upper wall struc that has contact only with the heated gases. t has been common practice heretofore to sup t th wall structure independently of the his is, so that when. the flux blocks become erod ed or eaten awayloy the molten glass or metal, can he replaced without disturbing the up structure. Usually the flo blocks are set inwardly relative to the blocks of the upper structure, a distance substantially equal to the thickness of the flux clocks; that is, the blocks extend inwardly 12 inches farther than the blocks of the upper wall so that they may he more easily replaced without disturbing the up per structure. Tuck stones are supported on the tops the flux blocks at the'lower edge of the wall, to seal the joint.

his prior practice is open to various objections, in first place, the furnace capacity isv greatly reduced by the insetting of the flux blocks; the weight of the tuck stones is imposed on the blocks; the flux blocks and the tuck stones are on necessarily exposed to the heat of the gases above the molten bath, with consequent shortening oi life; contaminationoi the glass through reaction products of the alkaline vapors in the heating gases combining with materials contained in the tuck stone and flowing down into the glass; since the metal line of the pool level is slightly below the tuck stone, the eating away or erosion or the upper course of flux blocks leaves unsup ported ledges thereon which are broken oil by the weight of the tuck stones, thus still further shortening the life of the furnace.

One object of my invention is to provide an iin proved manner of positioning the flux blocks and the tuck stones, so that the various objectionable features above-referred to are avoided.

Another object of my invention is to provide a tuck stone of improved -form and an improved manner oi supporting the same, so that it may be easily removed and so that its weight does not rest on the flux blocks.

Sonic oi the forms which my invention may talze are shown in the accompanying drawing wherein Figure 1 is a vertical sectional view through a portion of a furnace; Fig. 2 is a Sinailar view showing a modification, and Fig. 3 shows another modification.

ularly to the walls of melting furnaces, glass (oil Referring first to Fig. l, i show a iiu'nace h ing flux blocks l and 5 constituting of side and end walls oi the ilurnace, and hotto loloclss 6 and T The blocks upon which walls i and 5 test, have ledges do at above lower edges of the blocks nd 5, to prevent upward eating away or erosion the blocks by action of the molten glass, the lower inner corners of the side wall or blocks being shielded from the glass by the ledges The blocks are held in place by suitable struts or bolts 8 cool. stays 9 which carry the bolts.

The upper wall or gas chamber structure com sists of the usual root lil side walls These members are supported from the buck stays 1 the clearance space which is usually required to permit of convenient installation oi. the blocks.

The tuck stones at their inner ends snugly the space between the upper walls ll the flux blocks, so that only their inner faces are exposed to the furnace heat, whfle their portions are of reduced thickness as llicated at l lo, to provide spaces between the top of the flux blocks and the underside of the tucl stones into which cooling air may be introduced from a conduit 15, through perforated pipes or nozzles 15a. The tuck stones are thereby cooled to lengthen their life, and the upper edges of the flux blocks are similarly cooled at the points where they are subjected to the greatest heat and to the erosive action of the glass, namely near the metal line, where they also have some contact with the furnace gases.

The tuck stones are supported on angles ld which are detachably bolted to the buck stays, so that they can be readily removed to permit con venient replacement of the flux blocks and the tuck stones. These angle brackets 16 may on tend substantially the length of the furnace or be made in short sections. Preferably the entire weight of the tucl; stone is imposed on the angles 16.

The dotted line 17 indicates the erosive or eating action oi the molten glass, and it will be seen that such action produces an unsup iii) l the Wordd.

in inue d l dot; case th lted to ti 1 oi? tilt J l overhalanc iace and the terior the if filo; wetlr as are angle iii and tit reduced 1 stones i hold l1 ilrinh prevent tilting: thereof. Iii? ing wedges could also he eni l iloped in. ture of Ilaig. Ii.

In the structure of Fig. 2, are provided hetween the tops or and the under surface or the too in Fig. l. The spaces above the serve to prevent excessive heating oi gles 13.

In Fig. 3, I provide a wall construction Wherein tuck stones 25 of uniform. thickness sup ported on angle hare 26 independently oi the up per wall and the flux wall of the i .inoce. Wedges 2'? are inserted between the upper sue face of the tuck stones and the angle hers 28 that serve to support the upper furnace wall, to prevent tilting of the tuck stones inwardly. A recess 29 is provided between the under surface or the tuck stones and the top of the i'luir-"lziloclr wall bu shapingor cutting away the upper outer edges of the fluir blocks, so that cooling oi? the flux blocks at the metal line may he effected. Likewise, since a minimum area of the tuck stones is exposed to the furnace heatand they are on posed to the cooling air at their under surfaces, the tuck stones will be maintained at a lower temperature than the furnace temperature, so that the top of the flux blocks will not be so readily heated by heat conductedthrough the tuck stones.

By the provision of the recess between the under side of the tuck stones and the too oi the flux blocks, so that the top of the flux hloclrs can be cooled as well as other portions of the wall at the metal line of the furnace, the wall is more effectively maintained at a temperature whereby the rate of erosion of the fiur. blocks is retarded, thus resulting in longer life and service for the flux wall of the furnace.

I claim as my invention:--

1. The combination with a furnace having a lower wall structure and an independentlwsup ported upper wall structure, of a tuck stone inter spaces .oclts ii 5 e upper o ii Q a d lower t s and.

. s" :1 terposedhetwee... Sttltl.

l a hroclret detachahly' connect" t to and supporting the tuolr stone ii. tntlp oi the lower wall structure e. The combination with a furnace having" tower wall structiu'e and an upper Wall strt so, with huclr. stays for supportingthe upper wall structure independently of the lower wall, oi a tuck stone interposed between the said structures, the tuck stone being of reduced thickness at its rear portion, and a bracket detachahly connect ed to a buck stay and having a lip in supporting engagement with. the underside of said reduced portion.

7. The combination with a iurnace having a lower wall structure and an upper wall structure, with huels stays for supporting the upper wall structure independently of the lower Wall, ot a tuck stone interposed between the said structures, the tuck stone being of reduced thickness at its rear portion, and a bracket detachahly connected to a buck stay and having a lip in supporting engagement with the underside oi said reduced portion, the said lip being in vertically-spaced relation to the lower wall structure, to permit introduction or cooling fluid between the same.

8. The combination with a iurnaee having a lower wall structure and an independentlpsup ported upper wall structure, of a tuck stone interposed between said structures and serving to seal the joint between the said wall structures, at the inner side of the furnace, the outer portion of the tuck stone at its underside and the adjacent edge of the lower wall structure being spaced apart to provide a space for a cooling medium, and means for supporting the tuck stone independently of the lower wall structure.

JAMES M. LAMBIE.

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