US1085540A - Metallurgical-furnace part. - Google Patents

Description

l W. W. CASE, JR.

MBTALLURGIGAL FURNAGE PART. APPLICATION FILED SEPT. z2, 1913.

Patented Jan. 27, 19,14.

lll-llltmlllllllllilll miren WSTATES PATENT @Freien .WILLIS w. cAsE, Jn., or DENVER, coLoRAno. y

METALLURGICAL-FURNACE PART.

Application med september 22, 1913. serial No. 791,128.

To all AL11/omit may concern:

lie it known that I, WILLIS NV. CASE, Jr., a. citizen of the United States, residing in the city and county of Denver and State of Colorado, have. invented certin 'ne-W and useful Improvements in Metallurgical- Furnace Parts; and I do hereby declare the f lfollowing vto be a full,clear, and exact de- 1 -scription of the invention, such .es will en l able others .skilled in the art to which it appertains to make and use vthe seme.

`LThls invention relates to metallurgical gfurna-ce parts, and more particularly to a i 'crucible nud :its mountngpinseid furnace, 4.-15 whereby the same may be-used `as `a Crucible '.-pmper or converted into a retorh v y In the present application I do-not'lclam the speciic formo furnace with its lining, comprising .a plurality of 'losly spacetime-- 2o ractory vprojections engaging' the walls of the crucible, which feature is claimed in my Patent-#1,066,995, patented July-8,.

1913, although for thepurpose 'of a com- .pletedisclosnnerefrence lis had to .thenc- A 'dra 7 `:.illustrativi@"1L'prato--v tical; em irnent io my invention nsfnp .plied to-awtilting furnace,` and the particu# features of noveltyothe seid' invention will be pointed -outwmoreprecisely v.in the claims..

In the drawings forming@ part of this application numerals-designate .the lsainepai-rts iii-throfseeml-.-views,v in .Which- Figure 41 central vertical. sectional f 3.5"vewthrougha Ytilting fulmaceembracing my invention. Fig. 2 isa "top-'plan View ofthe Crucible lid. Fig Sis a side-elevation of saidlidlookingin the Vdirection of the'V arrow inFlig."f2. Fig.' t.tris a' fragmentary i 4o-:vertical sectional viewfon the line LA of'- v .'Fig. l looking inthe direction of the arrowk,

ig. 5 is a fragmentarysectionul View show- .ing `alsligliitly modifiedform of the spout' of thel crucible associated with the lining 7tuteuessential:featuresof the present invention, they may be briefly referred to as com- .prising an iron sheathing l incasing the -furnace walls 2 the furnace being provided.

with u lower chamber 8, and an upper cham- 55 ber 4, seid upper chamber beinglined with blocks 5, provided on their inner faces with a plurality of closely spaced heating pro- ]etwns adapted to engage a Crucible contained therein and supported by the legs 6 oi' a pedestalxuounted in said lower cha-mber 3. The upper chamber 4 and the lininf:r blocks 5 are curved as shown to com ly with the upwardly curving contour of`t crucible hereinafterreferled to.

7 designates a suitable support, secured to the lining, on which is mounted .a vertical sleeve 8, containing a vertically '.reciprocating'splndle 9, said spindle carry- ,-1ng a Arotary',support 10. 'The rotary support 10 1s provided with an operating lsrarndlell and an arm-12, which arnrs connected with an iron-hand 13, surrounding and securely attached to the .furnace .cover 14,--wh1ch-1s provided with a central lfimd which cover .may be stayedfrom said support 1Q.' by suitable. stay rods 16. '17 .is a plug-for closing an opening, leedmg from the/bottom chamber 3 .to withdraw Specification of Letters Patent. Patented Jan, 27,1914

any'moLten motel should the crucible from any .cause break, .and 18 is apawl controlled lever tor reciprocating the spindle Ai), where` by the letter end-the cover 14, .may be lifted olf of the furnace and revolved laterally from above .sameby .the handle '11,.

1S-is a discharge spout-:formed 4.it-he- .topedge of .the furnace wall, and is substantmlly semicylndrical inv cross-section.

In. thepresent application I ldo `not claim vany features broadly lthus far described, .as they haver-:been claimed in my Y*forllher patent referred to, covering .they

type of'tilting furnace mantiene *Inimy present inventiomfl enfploy and claim a particular type' of' Crucible, .which .may Vbe utilized with .a furnace, as .a 6111101-,

.ble pense, and .whiclralso may lhe converted intonl a. retort, a very important feature to those engagedin metallurgical pursuits.

j'ihe' .trough 19, broadly referred'k, .is proffvided with .u lining `20 ofeny .suitable ma terial, but preferably formed of .plumbago,

fund is substantially' semi-cylindrical to lit said discharge trough, the inner 'edg of said l.ining20 bei-11g .provided withyan iu- .ticu-lar tex-nal flange 21. The' crucible'22 is formed i -with a short spo-.1t 23,01? subutantially semi cylindrical contour, adapted to snugly rest on auldpbesnrroundedbvv the'internal flange 21 of tho/lining 20.. The 'short spout 23 is not in the nature of a-.lip discharging et the top edge of thecrucible but the lower Surfacef -the .spoutV extends at righi angles to the major axis of the' Crucible, and is-cut awayina vertical plane, as at 24, forming an open ended spoutof substantially semicylindricaly construction, the base 'or pourthan the crucible will contain, the bottom of the spout 23, being located a considerable distance belowl the top edge of the Crucible proper, the molten metal will 'iiow out through thel trough before it canreach the top edge ofthe Crucible, which will prevent ered .furnace lining from destruction. Also should-such acondtion arise, and the metal begin-to flow out of the spout into the trough .19, the internal ange 21-vvi1l prevent the ,metalv from slopping backwardlythrough vthe trough between-the same andthe cruci ble spout, so that. under no conditions can themolten metalcome in contact1,v`vith the furnace lining from uany such causes.

In converting the crucible' to a retort I9 providea-cover'2-5 of peculiar formation Jas -s'hown in Figs. 1 to 4, and'which-is substanj-f tiallyV circular for lthe greater portion Aof its area, merging into `an cntension'or lip 26 which terminatesin alstraight edge 27 forming a cover lfor the spout of the crucible, while the circular -portion forms a lid for the cruci ble proper, t cls underneath face of the lid or cover provided with an annular recess 28,'1forming a-circular projection 29, "the said :recess 28 providing a seator ledge engagingl the top edge -of the crucible, and

the said circular projection 29 snugly fitting the intei'iorwalls of the crucible around the major portionof its upper edge. This lid or coverv is. also provided on its-upper face with a central boss 30, which curves down-k wardly and merges into the upperfaceof the lid.` The lid and boss may also be pro videdwith a small central bore 31, said boss bein adapted to project a short dist-ance within the opening 15 of thefurnace cover. The lid may also be provided if desired with a raised reinforcing portion 32, pro]e'cting from the body of the lid along the: extension 26, as shown more clearly in Fig. 2.x The underneath face of the furnace cover 14 s recessed as yat 33 providing a flanged base 34 for supportingythe' cover onlthe furnace, the recess being -of such 'a depth and of such a diameter that -it forms, with the outer surface of the Crucible lid, a passageway forcarrying o- .the products of combustion, which pass lupwardly and through the furnace,\ betweensaid checkerework of heater from the retort'may ass outwardly through the aperture 531,Wherethe lid is provided with such aperture, nl Fig. `6 there is shown, however, a .lid 25` similar to the lid 25, with the'e'xceptipn that the same is not provided with 'the aperture 31, and Where such a Vlid is' employed the discharge of fumes 'from the "Crucible-retort would `be through theope'n endedspout 23.

--In Fig. 5 there is shown a slight Vmodificationwherein not only is the lining 20 provided with an internal flange 21, but the spout 23'L is also provided on its outer end with a -depending flange 21, forming a the molten metal from slopping over the topedge of thecrucible and between it and the furnace lining, thereby vthe checkmore compact joinder-between the spo'ut and plumbago lining, to prevent back slopping,

as previously mentioned. v

From Vthe foregoing detailed descriptionV it is not. believed to be necessary to further describe the operation of the invention, for as-befpre aexplained,iino claim is rmade to the'open ended s'pc'u v23,`a`nd also through the `furnace proper/or to the tilting features Having thus described lmy invention, )what I claim'isz- 1.4 As a; metallurgical furnace part, a

'icruciblehavingan'opn upper end provided cyvitli a 4short spout of substantially semi l vcylindricalconstruction andcut awayat right vangles Mat its outer. end, forming adischarge surface .substantially below heitop edge of the crucible,- the outer surface of said spout being provided with an external peripheral flange, surrounding the discharge end ofsaid spout.

2." Asametallurgical furnace part a convertible crucible-retort,`comprising a crucible proper, vopen at ,its upper end .and prol vided, with anopen-en'ded short spout disposed at right angles to the vertical axis of vsaid crucible, said spout being substantially lsemi-circularin'crosssection, and a lid provided-fion its underneath face with an annu-I lar recess forming a ledge-adapted to seat snugly `on the upper edge of said crucible, said cover being provided with an extendin'g lip .orotherwisef agiaptedto cover said spout, and said. lid belngalso provided on its upper face with a central boss, curving downwardly 'topmeet thefupper surface of 'the lid.

13. A crucible for'metallurgical furnaces having an open upper end provided with a short spout, substantially semi-circular in cress-section, said spout being open-ended and disposed. at right angles to the major axis of said-Crucible, and a substantially send-circular4 lining, forming a. pouring trough adapted t0 b mounted on the furnace and provided at its inner end with an inturned l'angeV adapted te seat the outer- Curved spout projecting horizontally therefrom providing a discharge surface substantially below the top edge ofthe Crucible, the outer surface of `said spout being provided with an external peripheral flange, and a curved lin'ng forming a pouring trough, adapted to be mounted on said furnace and rovided at its inner end with an inturned ange adapted to seat below said spout on the inside of its external -flange.

5. The combination With a metallurgical furnace of a Crucible mounted therein and provided at its u per open end with a horizontally disposer? curved spout open at its top and outer end, providing a discharge surface substantially below the top edges of the Crucible, a lid for said crucible having an annular recess on its underneath face providing a ledge adapted to snugly seat on the top edge' of said crucible, said lid being provided With an extending lip or otherwise adapted to cover the upper portion of said spout, a central boss formed on the upper face of said lid, and a removable cover for said furnace provided with a central aperture and a recess on its lower face, for forming a passageway between said furnace cover and Crucible lid to conduct the products of combustion through said central opening.

In testimony whereof I aiiix my signa ture, in presence of two Witnesses:

WILLIS W. CASE', Jn.

Witnesses:

EDW. S. STEWART, J. S. GINsTA.

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