US946178A - Furnace. - Google Patents

Description

U. WEDGE.

PURNAGB.

APPLICATION FILED APB..16, 1903.

` 946y 1 78. Patented Jan. 11, 1910.

4 SHEETS-SHEET 1.

U. WEDGB.

FURNAGB.

APPLICATION FILED APRJB, 1908.

Patented Jan. 11,1910.

4 SHEETS-SHEET 2.

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:.'To concerm. limitediin this respect, in tactil/freier l Besit known that I, -UTLEY- :Winnen-,1 acitimore, "Pennsylvania, have -:invented certain .5' @Improvements in" Furnaces, 'otwhich thefollowing. isa specification.

#My 1 invention relates particularly -to that class' of furnaces whicl1- have a pluralityof superposed Working chainbersz alternating 1O- .\vi th-l mutlie"chanbers,-although 'sonrie of the ."lfeaturesxofunydinventionare applicable to nobherlthanf inutile furnaces 1Ihe 'objects of f my :invention areto sinnpli-y and chea en, 4the construction f of the ifurnacey touaei itateirepairs-fand: to provide .fl-forca s'ubstaxitially.l uni form' iheatingA of r the 4various .-mutlie chambers or fora a regulation ofithe e heating 'of ffthe a same, fif the '2 requiremiente l of- ;the' "urna ce f. demand such yregula- 2otcn.

In S-:the accompanying: drawings lFigure -1 y#is 'ai longitudinal iverticalsection' of suliicient -iot-.talrinltipleihearthfiinuiie Ifurnace Acon- -lstructedx in: 'accordanceiw ithm s invention to '25? provide .a "proper-minderstan ing of ithose dentures .hofconstruction 1 ofithe Efur-nace i to n vh-lohn my invention ipartico.larly rela-tes g If'lgf. 2 1s -avhori'zontal section of the furnace f'siniil'ar i to-lig` 2, i but illustrating a modiitiedtype': of lfurnace; -1`rrlig. 4 is a -tra'nsverse 'ivertic'al section of 1.a' =urnace omitting ythe centralE shaft .and titsl operating mechanism, ibut illustrating a @feature `of construction y iwhichconstitutesl part ot. myl invention Fig.

1 the v outer Allcourses of the brickwork or ma- -'sonry 'of' which said arches -are 1 composed, vin "order-that the larches mjay be'supportedy inde# @pendently' 'of :fthe-outer "Wall", 'of fthe ffrnace,

" .theel-atten being :built-1in sections Ll exten-din g from arch-to arch wasshown inftig; :1g

".The'= postsor columns 1 canA bejsteelfchan Ations 4-0 :desired means yof supporting the 'furnace fhearths -at a desired distance above the'arches rmayfbe. adopted Without departing' frein, the essential -features of my invention.' vgijj'insome cases, to so con stru ct? the rings@ that '-.they will `form .appropriate slrewbacks forf'the arches, `one finstance of such a ringtbeing Ilshown 'at Qalin Fig. 6.

The Ihearth 5 ofthe lowermost Working chamber a ofthe furnaceis supported upon aring 6 ontlie'posts .1, and uponftransverse girders 63, but 'the hearthsi' tliefo'ther Working 'chambers and valstl'ie fooffplate 9 of vtliev furnace 'fare @supported up'ifi the .arches 3,y lanldf in *the-case'- of a inutile jfur'nace fare raised above said'ar'chesto extentlsuicient: to f provideheating chambis X ,tot the desired capacity, between' lthe archfar ihearth. En the ifur'nace showrifinuthe"tijavce` ing 'this result is 'attained bysupportigfthe. :bricks 'orti-les: ofthe; hearth 'u ori'theft-iles 11 llocated I-atthe inner portion o each ar li-, 1andl npon'supportin ledgesl onthe Wall .sec-V :the urnace, although anyftherv termediate, annular, perforated, supporting Wall' 30, may-for example, be-used, as. shown in- Fig. 3 o: more thanone of such iv'allsfinay be employed, or the tiles"constitutingfthe fheartli' may be -mounted upon perforated .radial Walls 3l, such-as shown inFi," taand the outer 4Wall fof fthe "furnace niay'have openings, provided Av'rith" suitable y,reinovable closures 32,' fior' theinsertion olfI implements .'for removing accumulations of s'ootd`ust' or.

The lli-'rdesired, 4be supported upon a' bottor'ri arch-in the like'ffrom the 'heating chamber;

:the same manner asathe other heziiithlsgfsuch construction being shown iii'fFigflif.

' -Eaclr of the heating chanibers of i thefilr i. -nace shown in Figs. 1- and 2 is divided by a transverse Wall 13,1int0 two semi-circular passages and. at each sideofthe; furna'eare' erected a pair of lues 1 4.1 and, 4l5,eac'h@ottone 1 municatingthrough connecting Ques Q loyvith each of theheatng chambers o fthelfi'irglace. .Each oftheiiuesll isv preferahlyfg'syip- Ported .upon a' metal.rlateifssutf( oftherings 2, andjernbeldedjiifthe y ture of the dus Withvvhfch theliecotnn nil y dia thsehand side of the furnace,I coniniuiiicatesvwith the iiue at the right hand side of theffurnace through the heating chamber passages on one side of the partition walls 13, while the flue 14 at the right hand side of the fur- ;nace communicates with the flue 15 at the left hand side of the same through the heating side of said partition wall.

Between the topmost heating chamber and the first heating chamber below the same each' of the flues 14 has a transverse partition or cut-0E 17, and, in the opei'ation of the' furnace, the Vlower portion of each flue 14 is in communication with a suitable fireplace'from which the products of combustion flow into the lower portion of thc flue, in which they are free to rise until they meet the partition orcut-o 17, said products of combustion passing through the connecting ilues 16 to therespective heating chamber passages ofthe furnace and after passing through the latter flowing through the opposite lues 16 into the flues 15. Allv of the products of combustion from-each fine 15 can pass through its respective passage Y of the uppermost heating chamber to the opposite flue 14 at a point above the cut-off 17 therein, and can escape from said stack through a suitable outlet at the top of the same.'

Each of the furnace hearths and arches vhas a central opening for the reception of the central rotating shaft 20 of the furnace, which is protected from the heat by a covering or sheathing of refractory bricks or blocks 21, and carries the arms 22 which ,tated and spread and moved either in.

project` linto each of the working chambers :v 'of the furnace and are intended to `be provided with stirring and feedings blades,

whereby the bodies of ore or other mate.

rial deposited upon the hearths of the various working -chambers are stirred or agi-4 wardly or outwardly upon said hearths, the various working chambers being connected,

Y inthe usual manner, by means of passages 23, in order that the material fed onto the uppermost hearth will be caused to.pass

.over the hearths in succession from top to bottom, to be'- finally discharged from the lowermost hearth 5 into any suitable receptacle.- The central shaft 20 isl rotated by appropriate mechanism, preferably located at the bottom of the furnace, the support- `ing' posts 1 being extended in the form of le as shown in Fig. 1, in order to elevate tl` lowe'rinost hearth to'a sufficient extent to'p'termit of the proper disposal of the sha '-rotating mechanism below it. The

i upper end of the shaft projects above the L*fixed structnreof the furnace and carries suitable means for automatically feeding the' ore onto the hearth of the uppermost working chamber7 but as the constructionchamber passages-on the opposite" i location` of the' shaft-rotating and 'orefeedingdevices form no essential part of my present invention any further or Amore specific reference to them in this specification will be unnecessary. y y

'By supportingvthe furnace arches -and their superposed hearths -upon an outer metal struct-ure or" framework in the manner described, the sections 4 of the inclos ing wall of the furnace, being relieved from weight-'and crushing strain, can be constructed of lighter and cheaper material than usual, in fact, any material (asbestos cement or other -asbestos compound for 'instance) may be used which is capable-of resisting heat andproviding a gastightl inclosure for the woi'kingchambers of the furnace, or for the Working and heating chambers, when the furnace is of the Inutile type.

As the support ofthe furnace hearths and arches is not dependent'upon the integrity of the inclosing walls, but is effected independently of the same, it will beevident that any section or sections of said inclosh ing wall can be removed when it is desired to gain access to an arch or hearth for the purpose of repairing t e same. Such. repairs can', therefore, be effected with muchgreater facility than in furnaces in which the hearths and arches are supportedv by the vouter -masonry .Walls, which do not permit of the .removal of any,V considerable portion 0f theouter wall without endangering the stabilityy of the furnace.

Although the uter metal framework of 3 my v improved urna-ce must possess the strength necessary to carry the masonry structure, it willfbe less expensive than the complete metal incasement with which the external wall of a furnace of this type is usually provided, consequently the construction of the furnace is cheapened and its erection is facilitated. An incasement of light sheet metal, composed of .removable sections may, however, be employed in connection with the skeleton frame of the furnace, if the masonry walls of the furnace are not gas tight, or if for any other reason, the use of such incasement would seem to ybe desirable, or such of the advantages of my invention will be atained even if the metallicl casino' is heavy enough to carry rings, preferablay of the skewback type shown in Fig.' 6, upon which the masonry structure of the furnace is supported,

It will also be evident that the idea of constructing the furnace with a metal framework, upon which the arches, hearths, or like elements of the masonry structure are supported independently of the inclosing walls, is a feature of construction which is applicable to furnaces in general having superposed working chambers, whether such .furnaces are or are not of the mufl'e type, and this feature of my invention isralsoof Vvalue' in the construction. of a furnace having upper and lower sections separated by an air space for the purpose of cooling the adjacent portions'of the furnace, or for the reception of feeding devices whereby the material treated in the upper section of the furnace can, in its passage to the lower section, have added to it other material with which it -may be advisable to mix it prior to its treatment in the lower section of the comprising a series of superposed arches,

and hearths mounted thereon so as to provide a heating chamber between them, a series of vertical metal posts disposed around said furnace, and a seriesv of superposedhorizontal metal rings carried and supported vertically by said `posts and serving to support the successive arches of the furnace.

v3. A furnace having. a series of superposed arches each with hearths mounted thereon so as'to form a heating chamber beries of vertical metal posts disposed around said furnace, and a series of superposed horizontal metal rings carried and supported vertically by said posts and serving to support the successive arches of the furnace.

4. A` furnace composed of superposed sections each containing a working chamber with a metal frame upon which said superposed sections are supported independently of each other, said supporting frame projecting below the hearth of the lowermost working chamber to form supporting legs upon which the masonry structure of the furnace is elevated.

5. A furnace having superposed working chambers and a metal supporting structure having horizontal rings upon which the weight of the masonry structure is borne, said rings forming skewbacks for the furnace arches.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

UTLEY VVEDGE. liitnesses: t

HAMILTON. D TURNER,

KATE A. BEADLEL f u

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