US908311A - Furnace. - Google Patents

Description

J. P. MOLIMANS-,

FURNACE.

APPLICATION FILED JAN. 29, 1908.

Patented Dec. 29, 1908.

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J. P. MOLIMANS.

FURNACE.

APPLICATION FILED JAN. 29, 1908.

Patented Dec. 29, 1908.

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l jl jl jl jl jlj [:HI IJLQJLJLJQIJIJLJ In ven tor: %,4 ROM W Mona A ttys JOHN PUSEY MCLIMANS, OF NEW YORK, N. Y.

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Specification. of Letters Patent.

' Batented Dec. 29, 1908.

Application filed January 29, 1908. Serial No. 413,205.

To all whom it may concern:

Be it known that 1, JOHN Pnsnr MoLr- Mans, a citizen of the United States, residing in the borough of Richmond, city of New York, county of Richmond, and State of New York, have invented certain new and useful lmprovementsin Furnaces; and Ido hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled the art to which it appertains to make and use the same. v

My invention relates to improvements in metallurgical and like furnaces and com prises improvements upon the invention disclosed in the patent to Carr and McLimans,

No. 837,191, dated November 27, 1906, em-

b'odying means for removing debris from 'regenerator fines while the furnace is in opfilled it may be removed without stopping the operation of the furnace and an empty car introduced in its place.

My present invention comprises means for making a tight joint between the car and the flue, s9 cutting off air currents which otherwise might interfere with the furnace draft and preventing escape of debris, otherwise than into the car itself, thus avoiding clogging of the rails on which the cars run; the said invention also providing means for freeing a car which may be stuck fast owing to cementing by sintered debris at the joint so formed. r

In the operation ofregeneratively heated furnaces of the basic open hearth type, and

particularly with such basic open hearths, the strong draft through the furnace chambers picks up much debris anddust, filming materials, ore, etc., and tends to deposit its load in the usual downeomer flues leading to the regenerators. This flying dust, and especially with basic open hearth furnaces, is apt to have fluxing properties and to attack and corrode the flue walls. The debris from the furnace and from the flue walls deposited in the bottom of the flue from its sintered slaggy nature is usually called slag in the art though far from being slag in the usual sense of fluxed liquid impurities tapped oli from a furnace. In the operation of these regeneratively-heated furnaces, it is customany to interrupt the running from time to time, tear out the bottom of the down flues leading to the regenerators, remove the accumulations and rebuild the flue. .111 the stated patent, the down fines are provided with removable, pocket-like bottoms which can be taken away from time to time, thereby obviating the delay and expense of the usual practice.

The object of my invention is to avoid clogging of the track rails and floor of the flue with debris etc., and to prevent the cars from sticking in place when it is desired to remove them.

I will now proceed to describe my invention with reference to the accompany' drawings, and will then point out the midi features in claims.

Insaid drawings: Figure 1 shows afragmentary transverse section through a furnace provided with fines and cars as described, one

of said cars being shown as it is when just run into cooperation with the flue, and the other being shown elevated slightly so that it makes a tight joint with the flue. Fig. 2

shows a side view of the car and a fragmen tary transverse section of a portion of the walls of the furnace, and illustrates particularly the means for raising and lowering the car and for making a tight oint between the car and the flue; Fig. 3 shows a detail transverse section of the car; Fi 4 is a side view and partial section of an a ternative elevating device; and Fig. 5 shows a transverse section through such elevating device.

type of furnace, only a fragment of the furnace is shown. 2 designates the usual conduit for alternately supplying air to and withdrawing hot waste gases from the furnace, and 3 the fines for alternately supplying gas and withdrawing hot waste gases connected to down fiues 4. At the bottoms of these I in down flues are cross flues provided with track rails 6 upon which cars 7 are run.

- Customarilythe bodies of these cars are of metal and they are provided with a lining 8 of fire brick or the like. These cars are 1ntroduced into the fiues through doors at the ends of such lines, not shown, which doors are kept closed exce t when a car is to be introduced or remove In use, the car forms a pocketed bottom wall for the down flue, or a pocketed continuation of the floor of the cross flue. As shown, the sides. of the cross flues are provided, directly above the cars, with projecting shoulders 9 and means are provided as hereinafter described for raising the car into contact with these shoulders and for lowering it again whenthe car is full, thereby giving a direct downward pull without lateral components, to break the adhesion of the car to to the brickwork. If the ull be lateral, t ere is more danger of disodging the brickwork. Various means may be em loyed for so raising and lowering the car. ne such means is illustrated in Fig. 2- and comprises secondary axles 10 carried by the car and carryin eccentrics or cams 11 provided on their aces with teeth 12 or equivalent means by which a pinch-bar may be engaged with the cam to pry it up or down, step by ste Instead of causing the cams to engage t e track rail, as might be done, I preferably provide cradles 1 3 adapted to rest upon the track rails or any other convenient portion of the furnace structure, and which are provided with friction rollers 14 which the cams engage. There are two cams on each such false axle, one on each side of the car.

In the operation of this device, the car,. having been run into the flue, and placed therein in the desired position, doors-15 in the sides of the flue are opened, the cradles 13 laid across the rails or otherwise (according as the cradles are constructed) said cradles coming directly beneath the earns 11; and these cams are then barred u step by step until the refractory lining of t ecar makes a joint with the ledges 9. If desired the car may be locked in such position by means of locking bolts 16, dro ped into the space between two teeth of tile cam; although ordinarily locking will not be required owing to .the small throw of the cams.- In mostcases the throw of these cams need not be more than an inch or two; the scale on which the accompanying drawings are made making it necessary to exaggerate the throw.

One advantage of using the cradles 13 in conjunction with the cams, instead of causin the cams to act directly on the track rai s, is that using these cradles, the rotation of the cams produce practically no tendency to move the car longitudinally; the eccentries on the two false axles being oppositely placed as shown; it being important to a void longitudinal motion of the car, particu-.

larly when lowerin it, in order that there may be as little ten ency as possible to break away the shoulders 9. Another advantage of use of the cradles is that, such cradles being used, the cams may be made of smaller diameter than if theywere to act directly on the track rails, and so said cams are out of the way when passing rail joints, switchfrogsetc, and are not likely to be injured in case of accidental derailment.

The car being in place and the furnace in operation, the car gradually fills with debris,

etc.,-which falls or runs down the flues 4.

The material has a tendency to solidify at the joint between the shoulders 9 and the lining of the car, so freezing the car in place but such material being ordinarily of a glassy or sintered nature 18 quite brittle and readily broken if stress be applied to it. 35

Such stress is applied, when it is desired to remove the car, by turning the cams 11 back so as to lower the ,car down upon the track rails. The Weight of the car thus resting momentarily on the sintered material unitin the car to the shoulders 9, said materia breaks, thus freeing the car entirely. Owing to the very excel car and clog the track. It is therefore easy to remove and replace the cars, andthe wor required to raise the cars by means of the earns 12 is also relatively little.

Obviously the car may be raisedin various other ways. It may, for exam le, be wedged up. One convenient -mec anism comprising wedges by which the car may be so raised, is shown in Eigs. 4 and 5, comprising sliding wedges 17 locatedbeneath hin ed may be provided with means for raising and lowering the car body with reference to the truck. l-igs. 6 and 7 illrstrate such a construction, comprising longitudinal cam shafts 23 12 on the car trr cl's rovided with cams 24 w ioh, when said shafts are rotated, raise the car'body bodily.

What I claim is 1. The comlination with a regenerative furnace rovided with a chamber adapted for meta 1: rgical and like heatingoperations, and a down flue 1n commrn1cat1on therewith and adapted to receive debris therefrom, of a car movable into and out of engagement with said flue and adapted to make a joint therewith, and having a body ent joint which may be made between the car and these shoulders 9, no debris can escape around the sides of the 95 rawn together 1 10 eeaeii adapted to receive material from said flue and means for raising and lowering said body to make and break joint.

2. The combination with a regenerative furnace having a heating chamber adapted for metallurgical and like heating operations and provided with a down flue in communication therewith and adapted to receive debris therefrom, said flue having joint forming shoulders, of a car movable into and out of engagement with said fine and provided with a body adapted to receive such debris therefrom and means for raising and lowering said body into and out of engagement with srch joint forming shoulders.

3. The combination with a regenerative furnace provided with a down flue having an open bottom portion, .of a car movable into and out of engagement with said bottom ortion of said fh. e and means for raising and owering said car comprising shafts and cams thereon adapted to be rotated.

4. The combination with a regenerative furnace-provided with a down flue adapted to engage a car, of a car movable into and out of engagement with said fine and means for raising and lowering said car com rising transverse shafts andcams thereon adapted to be rotated.

5. The combination with a regenerative furnace provided with" a down flue adapted to engage a car, of a car movable into and out of engagement with said flue and means for raising and lowering said car comprising transverse shafts, cams thereon ada ted to be rotated and cradles provided with riction rollers against which said cams may act.

6. The combination with a regenerative furnace provided with a down flue ada ted to engage a car, of a car movable into an out of engagement with said flue and means for raising and lowering said car comprising transverse shafts and cams thereon, rovided with teeth adapted to be engaged y a lever for moving said cams.

7. The combination with a regenerative furnace provided with a heating chamber, a down flue leading therefrom and a cross flue communicating therewith and forming a continuation thereof, of a car movable into and out of engagement with said flues at their junction and means for raising and lowering the same, said cross flue having joint forming meanswith which the car engages when so raised. 1

In testimony whereof I aflix my signature, in the presence of two witnesses.

JOHN PUSEYMCLIMANS.

Witnesses:

H. M. MARBLE, W. M. CARR.

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