US1362532A - Furnace - Google Patents

Description

H.- 0. HIBBARD.

FURNACE.

APPLICATION FILED NOV. 1, 1919.

0 2. 9.] n S DM 5 1M3 m m D IGIIIIIIIIIIJ l I l l HQ 0. HIBBARD.

FURNACE.

APPLSCATION FILED NOV. 1, I9I9.

'Patnted Dec. 14,1920.

'3 SHEETS-SHEET 2.

I M Zb'IF 7 3. Hlbam'rn idizing .ylcys l4 and 15 engaged in section on the line 2-2 ol 1 weighing over a few hundred pounds.

presentapparatus provides a paddling far- 'the metal during the and of a size dependent UNITED STA S. PATENT oF,F1cE.-;-

HENRY D. IIIBIBARD, OF PLAINFIELD, NEW JERSEY.

FURNACE.

To all vclzom it may concern."

Be it known that I, HENRY I). HinnAan, a citizen of the United States of America, and residing at Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

. My invention relates to furnaces, and particularly to paddling furnacesi the object of my invention being to provide a furnace in which the metal is not only thoroughly agitated to secure a rapid chemical reaction between the iron and the oxidizing reagents, but also mechanically worked or paddled during the operation of the furnace withoutthe usual manipulation by hand tools now commonly practised.

In the accompanying drawings Figure l is a side elevation, partly in section, of the furnace in which my invention is embodied in one form:

Fig. 2 is a plan view-thereof. partially Fig. 3;

Fig. 3 is a partial end elevation furnace; and Fig. 4 is a sectional view on the line P4 of Fig. 2.

Iron paddling is still generally carried on by the hand process, which is not only slow. but also expensive and of small putput. since the operators have not the physical strength to handle batches of metal The of the nace which is power driven. and by which paddling operation is brought into intimate contact with the oxslag to effect the desired chemical reaction rapidly and thoroughly, while the metal is also i'nechanically worked to produce a finished product more free from cinder than the usual manually formed ball,

only upon the capacity of the furnace. f In the form here shown the furnace proper comprises an elongated reaction vessel supported in horizontal position on trunnions l3 and 7 at ils opposite ends. These trunuions rest on roller bearings 8 and fl arried by brackets l0 and ll at the upper ends-of, strla-tural pillars 12 and 13. On one or both trunnions are secured pulbysuitabl-c bands or chains 16 and i7, leadingto suitable motor Specification 01. Letters Patent. ic ation filed November 1, 1919. Serial No.

charge of the worked charge.

comnmnicates at its Patented Dec. 14,1920."

means (not shown), by which an oscillatory motion is imparted to the furnace durmg the treatment of the metal, and a partial rotation of greater extent on the-dis- It-will be noted that the trunnions are so locatedv that the axis of oscillation is on one of the transverse diagonals (if the furnace ohambelybut to one side of the longitudinal mean center line of the furnace chamber.

The interior of the vesselii by a dam '18 into a pair of or containers 1!) and 20, see Fig. 4.:each of which of sullicient capacity to contain the entire charge. Both pockets open to the upper portion of lbe'chamber, which in turn opposite ends with passages 21 and 22 through the trunnions 6 is subdivided pockets, wells,

and 7. respectively. The side walls 23 and 24 of the reaction chamber are longitudinally. and the bottom transversely. arched in'order the bctter to support the lining of the furnace. As here shown (Fig. l), the side walls 2 and 2+ ol' the furnace in transverse section meet at right anglcsat the top of the furnace, while the bottol'n follows an arc of fill degrees struck from the center of oscillation 33 with lhedam 18 formed by a rci ntrant segment midway between the ends of the arc bottom; in one of the side walls. VlZ., 23, is opened the chargingalncl discharging port 2: extending substantially the length of the reaction chamber and normally closed by a door 26 hinged at 27 and suitable reaction temperature during the first part of the treatment. But after the reaction has progressed somewhat the reacl'ion becomes endothermic. and it is necessary to provide-means l'or maintainingtho requisite temlwraturc to theend ol' the treatment. Any suitable means may bcprovidcd for supplying heal. to the charge-as needed. Air passages 32 and-33 opening to the hollow trunnions of the reaction chanr bertake-heated air from the regenerators to burn the supply of fuel from burners 39 and 40 entering through apertures 37 and 38. Of course the fuel passes into the reaction chamber through one trunnion, and the burnt- ;ascs out through the other, the direction of the flow being controlled by an ail-reversing valve 30 of usual construction. The ports 37 and 38 are formed through the side Walls of the air passage in alinement with the trunnions 6 and T, and oil-line nozzles 39 and 40 are introduced therethrough to supply fuel to the reaction chamber as required during the-treatment.

I The operation of the apparatus is readily understood. Should the charge be placed cold in the furnace, the initial. melt is so cured by means of the oil burners and heated air. Or the iron. may be llltlOClUCQQl in molten condition with an oxidizing slag or.

reagent, the iron and reagent being im miscible with each other. The exothermic chemical reaction which atonce bcgi s is of sufficient intensity to maintain the required temperature until the carbon is freely oxidized. To carry on the reaction after the charge is introduced in the lurnace, the motor is'set in operation to roclt th furn c 5 back and forth on the truunions .3 and T, the direction and extent of oscillation being such as to pour the charge, say from pocket 19 over the dam 18 into pocket 20. and tien back again over the dam, but at all t mes keeping it clear of the port 25. so that at no time does it lie against the door linasmuch as the oxidizing slag is of lower specific gravity than the iron, it is the first to flow over the dam, and the molten iron passes down through it,thus ctlecting a very intimate mixture of the two and obtaining a thorough, rapid and uniform reaction in all. parts of the charge. complete, and the metal hardcns into a hall or bloom, it falls over the dam from pocket 19 into pocket 20, and back again, effecting a thorough Working of the metal, and by its impact squeezing out the contained slag to a much greater extent than is possible with the balling manipulation by hand now commonly practised. Then the bloom is completely formed the furnace is rolled over in the direction of arrow X (Fig, 4) until tl te side 24 of the furnace becomes the bottom. The furnace is tilted sufiiciently 'to first discharge the still molten slag through the channel 30. The bloom of Wrought ron rolls down the side 24 as its inclination 1S increased, and passes out after the slag by gravity through the port 2:,

pushing open the door 26, which has been unlatched in anticipation of the discharge of the furnace. Any suitable arrangement may be provided for receiving the Wrought tgreatly facilitates After the reaction is metal and conv "'ng it to the usual squeezers which eliminate the contained cinder.

It will be obvious to those skilled in the art, that the present apparat not only c;. the reaction between iron and its 02nd; lug-slag, but also a much more uniform and complete than M hitherto been obtained ianzl Diltl'lll furnaces. Furthermore, automatic charge of the furnace by rolling it 0'. 1 the .lling of the bailed met 1 which comes out an from the furnace in the sh of an elongated spindle, tapering to its ends, instead of as series of relatively small balls.

I use the Word furnace in the it fication and claims to define meta. appa atus in which means, supplem the reaction heat of the charge itsc. en'iployed to secure the temperature 1 site to the desired treatment.

Various modifications in detail, shape, ar rangement and construction will readil t occur to those skilled in the art,'rrhich t. not depart from what I claim. as aw in 'vention. Q

I claii 1. A metal working furnace comprising a reaction YQSSBl having a plurality of containers or pockets, each adapted to receive and contain the charge, a dam between adjacent pockets, ineav s for rocking the vessel to pour the charge in molten condition repoalcdly from one pocket into theotlier and bin-l; again over the dam to promote the reaction between the elements ofthe charge,

ill-.tllS to heat the charge, and a door through which the metal may be discharged in solid l'orm after the completion of the reaction.

2; A metal working furnace comprising a reaction rcsfiel'having a plijirality of containers or pockets, each adapted to receive and contain the charge, i it door through which the "t vssel is clia and discharged, means for rocking ti ssel to pour the charge in molten cond on repeatedly from one pocket into the ot and back again to promote the reaction. b mreen the elements of the charge, means to i the charge, and

n one direction to trunnion, together with a door through which the metal may be discharged in solid form by the tilting of the vessel after the completion of the reaction.

4. A metallurgical furnace having a horizontally elongated reaction chamber, and a door opening in the side wall of said furnace, a door closing said opening. said door being out of contact with the charge during the reaction, and extending substantially the length of the chamber, together with means to tilt the furnace to discharge the metal through said door in solid condition after completion of the reaction.

A'n'ietallurgical furnace having a niov able reaction chamber, a door through which the treated metal may be discharged in solid form after completion oi the reaction, and an independent discl'iarge channel for the escape ofythe sla 'in fluid condition in advance of'the dis arge of the metal through said door..

6. A metallurgical furnace having an oscillatol'y reaction vessel, a dam arranged in the reaction chamber, and over which the charge flows when the vessel is oscillated, an end openingto the chamber substantially coaxial with the axis of oscillation, and means for introducing fuel andcair into the read tion chamber through said opening.

. 7. A metallurgimilfurnace having an oscillatory reaction vessel, a dam arranged in the reaction chamber, 'and over which the charge flows when the vessel is oscillatcd,an

end opening to the chamber substantiallyv coaxial with the axis of oscillation, means for introducing fuel and air into the reac-- tion chamber through "said opening, and an associated regenerate! foc preheating the supply ot"air.

s. metallurgical .i'urnace having an oscillatingreaction chamber or vessel adapted to receive a charge of two or more immiscible molten reagents, and to mixthem for the purpose of promoting chemical reactions belu'een them by oscillating the. vessel, said vessel ha ring a door opening extending substantially the full length of said chamber and large enough. to permit the discharge of the metal therethrough in one solid piece, and a door therefor,-said door and door opening being arranged out of contactv with the charge during the period of reaction,

9. A regenerative metallurgical furnace having a hearth adapted to oscillate and revolve about an axis arallel to the center line of the furnace and provided with a dam over which the molten charge is made to flow by the oscillations, together with means for heating the charge during the'furnacing of the latter. a

10. A regenerative metallurgical furnace having a hearth adapted to osclllate and re- \'ol\'e about an axis parallel to the center line of the furnace and provided with a door adapted to be kept above the charge during the oscillation, but through which the charge may be evacuated when the. hearth is revolved to the proper position, together with means for heating the charge during the furnacing of the latter.

U. A regenerative metallurgical furnace having a hearth adapted to oscillate and revolve about an axis parallel to the center line of the furnace and provided with a dam. over which the charge made to flow by the oscillations, and a door adapted to be kept above the/charge during the oscillations, but through which the charge may be evacuated when the hearth is revolved to the proper position, together with means for heating the charge during the furnac-ing of the latter.

[2. A metallurgical furnace comprising a reaction vessel having two containers or pockets, each adapted to receive and contain the chin-"e. a dam between said )ockets a.'

door suitable for discharging the vessel and extending the length of the vessel and located so as to be above the'charge during the reaction. and means for oscillating and rotating said vessel.

In testimony whereof I have signed my name to this specification.

HENRY I). IIIBBARI).

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