US929701A - Furnace. - Google Patents

Description

W. M. PAGE.

FUBNAGE.

APPLIUA'HON FILED SEPT. 2. 190e.

Patented, Aug. s, 1909.

l/l//l//l/s Inventor annum am mcwe-LlmocnuPl-xslls WASHINGTON. av C.

` UNITED sTATEs 1PATENT oEEroE.

`.WILLIAM`M. PAGE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO DUPLEX METALS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEWYORK. p

FURNACE Specification of Letters Patent.

Patented Aug; 3,1909.

Applcationrled September 2, 1908. Serial No. 451,340.

l Be it: known that I, WLLIAM M. PAGE, a

\ citizen of the United States, residing` at f Philadelphia, county. of Philadelphia, and

State lof Pennsylvania, `have invented certain new.. and useful Improvements in `Furnaces, of which the following is a specification. v i

My inventionrelatesto improvements in melting `and coating furnaces, and is particularly intended foruse in the production .fofclad metalingots by surrounding a core of solid `metal with a1 body of a; molten unlike metal and permitting such molten metal to solidifyagainst" such core.

Processes (for producing clad metal `ingots inthe mannerdescribed are set forth in the patentto John F..Monnot, 853,716.

The objectsof `my inventionare to` facilitate, and lessen.` the.` expense of, `the melting and coating operations, to avoid the necesf sityof using expensive crucibles heated from the outside, to heat the metalmore economfically than can be done when heating from` the outsideof the Crucible, to provide a relai tively shallow layer of metal for the melting and heating operations, and a relatively deep i `layer of metalforthecoating operation, and s to make thefurnace easy to handle and opexpensive. p .l i

` Iwillnowproceedto describemy invenerate and simple, reliable an-d relatively in- 'tion withv reference ,toj the accompanying drawings,` in which one form of furnace ein` bodying my invention is illustrated,and will "their point out, the `novel features in the j n, In said:drawings:f `Figure l showsa top view of myimproved furnacein its horizontal or normal position; Fig.i 2 shows a rear view of said furnace insuch horizontal position; Fig. Bfshows a front view of the i furnace in such horizontal position ;A Fig. 4 i "shows a central vertical section of the furnace x jtiltedto` its vertical position, and Fig. 5 i shows a central vertical section of coating r appatatusadapted to be used in connection with said furnace.

t My furnace comprises a chamber mounted upon;` trunnions whereby it may be swung i y from itsnormalhorizontal position to a ver- ."tical position. In the horizontal position des a relatively shallow urnace provi ontain a layer of solid or vided.

.ther provided with Plyilllg t0 ital 110111@ which hearth flame may be projected so that the metal is heated by Surface heating substantially as in yan ordinary reverberatory furnace; while when thefurnace is tilted to vertical position the .molten metal runs down into what is then they body of the furnace, providing a `deep body of molten metaLf The furnace chamber usually consists ofa metal casing lined with refractory metal, saidchamber having suitable doors for the charging of the furnace with molten metaland for the entry and escape of the flame gases 5 also for theadmissionto the molten metal of the objects to be coated."`

In the drawings 1 indicates the saidcasing, formed in two sections as shown, fandpivoted upon trunnions 2-2;.3 designates the refractory lining. As shown, this furnace ,is of approximately T shape,and whenhorizontal provides a broad hearth 4 ofmoderate depth,

heated. When inserted into the vertical position shown in Fig. 4, the molten metal, of course, runs downinto what is *their the lower portion of the furnace, forming a deep body of molten metal in direct linewith the :opening 5, in what isthen the top ofthe furnace, such o ening then serving for introduction `of articles to be coatedinto the molten metal.` A suitable swinging door, counter-weighted to hold it closed normally when the furnace is ina horizontalposition,

4is provided for closing` this opening. At `the other end of the furnace, in what is the top of the furnace when the latter is in ahori- Zontal position, there is another opening 7; and forclosing this opening a door Sis pro# Clamping means are also jprovided for holding this door closed ag;tins@` the weight of the molten metal, such meanscom prising a pivotedbar 9, a hasp `lv d clamping eccentric Il. Such clamping e is required toprevent escape of moltenmetal 1 f through opening 7 when the furnae turned to the verticalposition,asshown` Figli. f f ,11

`In Fig. 5I illustrate onefo apparatus adapted to ,be` used with this furnace, the same om sing ing `12 having ahead `13in`,whic iisla ring for the passage of apo,l erybar` 14 ltoythe lower end of which isconnected abilletfl or i ,i adapted to contain the metalto be melgdfol. y

` roo likeobject'to be coated@ `The casing is fur-` alvedpipe 16 for sup zing gas, such as producer gas made from charcoal, which will prevent oxidation of the billet prior to submersion in the molten metal' and will also prevent oxidation of a fhn coating formed by momen- 5 tary submission of the billet in supermolten metal followed by withdrawal of the billet from contact with the supermolten metal, as described in the Monnot patent No. 858,716. In these coating operations, involving the coating of steel with supermolten copper or like metal, it is usually preferable to havethe billet preheated to a considerable extent before it is contacted with the molten metal. Nevertheless the surface of the said billet u on contact with the molten metal, must be a solutely free of oxid. Y It is easy to heat a billet in a suitable furnace under such conditions that'it shall not be oxidized, and the casing 12 filled with a non-oxidizing atmosphere constitutes convenient means for protecting the surface of the billet from oxidation during transfer from the preliminary heatingv furnace to the coating furnace. When desired, the billet may have applied to it a bottom plate 17 which is adapted to make atight joint with the bottom of the casing 12. In such case, the apparatus is adapted for forming coatings from the molten metal in the furnace by the so-called "segregation kmethod described in said lMonnot patent 853,716, and in the Monnot patents Nos. 851,684 and 851,998 both dated April 30, 1907. o Y

The'manner of using my improved furnace is as Yfollows:-The furnace is charged with metal either in the solid `or molten state as preferred, andit is convenient, though not necessary, to tilt the furnace into its vertical position, or into nearly a vertical position when so charging. The furnace havlng been charged, it is swung back to its horizontal position, and the doors 6 and 7 being opened, flame from a suitable burner (not shown) is projected through the furnace and above the molten metal therein, the products of combustion emerging through the opening 7.

Heating may take place in the furnace substantially as in an ordinary reverberatory furnace; and if desired, the surface of the molten metal may be protected from direct contact with the heating gases by means of a layer of molten flux, or the like, the heating inV such case taking place by radiation and Y `.conduction of heat through the molten iiux. '55 Duringthe heating, the molten metal may be,V treated with de-oxidizing and purifying agents as in the ordinary processes of melting co o er andlike metals, and may be oled or worked, as common in t e meltvvo kingofsuch metals. The metal 'i aised to theV desired temperaple e supermo'lten temhe Monnot patent edto its verclosed, and objects to be coated may be dipped into the molten metal'in the furnace through the opening 5. I/Vhen, by repeated clippings, the temperature of the molten metal has been lowered, the furnace may be swung back into horizontal position, and the burner operated again to raise the metal to higher temperature, and from time to time fresh charges of solid or molten metal may be added. j

In the side of the furnace suitable peep holes 18 are provided. .Instead of admitting the fiame through the opening 5, other suitable openings may be provided in the sides of the furnace, as shown at 19 or flame may be introduced simultaneously through opening 5 and these 'openings 19.y

What I claim is'z- 1. A furnace for molten metal comprising a swinging chamber of greater length than height, one side of which, in the horizontal position of said chamber, forms a hearth to contain, molten metal, said chamber, when tilted from such horizontal position, forming a relatively deep receptacle for molten metal, said chamber having an opening in that side which is the top when the chamber is so tilted and in vertical lline with said receptacle, adapted to permit passage of objects to be coated into the moltenmetal, and having means for heating its contents.

2. A furnace for molten metal com rising a swinging chamber of greater lengti than height, one side of which, in the horizontal position of said chamber, forms a hearth to contain molten metal, said chamber, when tilted from such horizontal position, forming a relatively deep receptacle'for molten metal,

ico o said chamber having an opening in that side Y which is the top When the chamber is so tilted and in vertical line with said receptacle, adapted to permit passage of objects to be coated into'themolten metal, said chamber having also an openingfor the escape of flame gases. Y

3. A furnace for coating with molten metal comprising avswinging chamber of greater length than height, one lsidev of which, when the chamber is in its horizontal position, constitutes a hearth for holding molten metal, the chamber when tilted from' its horizontal position forming a relatively deep receptacle for molten metal, said chamber being provided-with means forpassing flame over said hearth and for passing articles to be coated through the topof such chamber' downinto the molten metal when such chamber is'in lits tilted position. I

4. A furnace for molten metalV comprising a swinging'chamber which, when horizontal, has relatively great kbreadth as vcom aired with its depth,and which, when tiltedfbrms a relatively dee receptacle for mol metal, said Vchamber avin I nt sA io VtoK ting Vits Y r'passrng .obv1 3 0 ijects into contact` with the molten metal within it after tilting.`

5. A furnace for molten metal comprising a swinging chamber of approximately T shape, one side oi' which chamber forms a hearth .for holding molten metal when the' chamber is in its horizontal position, said chamber having means for heating its contents in said horizontal position and for passing objects `into contact with the molten metal within it when in the vertical position.

such verticalposition.

`6. A coating furnace comprising a deep chamber adapted to be swung into a horizontalposition and having openings at each r end constituting respectively iiring and waste gas ports when in such horizontal position, the iiring port being in line with the chamber and adaptedfor use as a dip ing port when said chamber is in a verticalj position `andthe waste gas port being adapted for liquid-tight closure when such chamber is in 7. `A coating `furnace comprising a deep "swinging chamber provided with a hearth depression in one side, and having openings at eachend constituting respectively firing I `and waste gas `ports-when in a horizontal in suc i vertical position.

position, the iiring port being in line with the `chamber and adapted for use as a dipping poi-t when said` chamber is in a vertical position and the waste gas ortv being adapted for li uid-tight closure w en such chamber is S. A coating furnace comprising a deep chamber having a lateral enlargement at its head and adapted to be swung into a horizon- `tal position,` said chamber having openings at eachend constituting respectively firing and waste gas ports when in such horizontal p`osition, theiiring port being in line with the chamber and adapted for use as a dipping y port when saidchamber is in a vertical position and the waste gas ort being adapted for li uid-tight closure w ien such chamber is in suc vertical position.

9. A coating furnacecoinprising a deep chamber having a dished lateral enlargement at its head and adapted to be swung into a horizontal position, said chamber having openings at each end constituting respece tively hring and waste gas ports when in such horizontal position, the firing port being in line with the chamber and adapted for use as a dipping port when said chamber is in a vertical position and the waste gas port being adapted for liquid-tight closure when such chamber is in such vertical position.

l0. A coating furnace comprising a chamber having approximately aT-sliape and pro# vided with an opening in the head of the T adapted to serve both as a firing port and a dipping port, and with a closable opening at the other end adapted to serve as a waste gas port when open, means for swinging said chamber into vertical or horizontal position, and a closure adapted to seal said waste-gas port liquid-tight.

1l. A coating furnace comprising a chain- 4ber having approximately a T-shape and dished on one side of the .head of theT, said chamber being provided with an opening in the head of theT adapted to serve both asa ring ort and a dipping port7 and with a closab e opening at the other end adapted to serve as a waste gas port when open, means for swinging said chamber into vertical or horizontal position, and a closure adapted to seal said waste-gas port liquid-tight.

In testimony whereofl aiiX my signature in the presence of two witnesses.

WILLIAM M. PAGE. Witnesses: i

H. M. MARBLE, FRANK E. RAFFMAN.

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