US2415595A - Blast furnace cooler - Google Patents

Description

Feb. l 1`, 1947. S p K|NNEY .K

BLAST FURNACE COOLER Filed April 8, 1944 O O O INVENTOR SCZWyJzeP. Kinney l* m7 ,Mfmf

- Patented Feb; 1l, 1947- UNITED- As'rarlss PATENT o Price l BLAST FURNACE COOLER Selwyne P. Kinney, Grafton, Pa., assignor to S. P.

Kinney Engineers, Inc., Pittsburgh, Pa., a cor poration of Pennsylvania Application April s, 1944, 4sei-iai No. y530,153

soumis. (ci. 26e-41) A This invention is for age. by molten iron or slag that may result from the burning through of a blow-pipe.

In the conventional blast furnace design, the tuyre through which the blast is introduced into the lower part of the furnace is removably supported within' a cooler, this cooler' being ygenerally a frusto-conical body having an inwardly tapered central passage therethrough to receive the tuyre. The cooler is connected with a water circulating system. The blow-pipe which supplies air to the tuyre extends axially through the cooler, its inner end terminating at the tuyre .and its'outer end connecting with the boot-leg that extends vupward to the bustle pipe that sure rounds the furnace. Thetuyres must be quickly replaceable, and to accomplish this, theblowpipe is disconnected, the tuyre pulled outwardly through the cooler, a new tuyre is insertedv and driven into its seat at the forward end of the cooler.

Occasionally in the operation of the furnace,

. molten iron or slag will back up into the blowpipe, b`urn through lthe blow-pipe, and ow onto the cooler, destroying the'cooler. This is apt to occasion a shutdown of the furnace for a considerable timeto enable the cooler to be replaced.

According to the present invention, the cooler is constructed with removable refractory or other suitable material around a portion of the interior thereof which will protect the cooler when metal or molten slag does burn back through the bustle Also.y cooler rings are apt to be damaged from over-heating, due to air becoming trapped in .the water circulating passages thereof, and the pres-- blast furnace coolers and relates to a cooler which is protected from damand blow-pipe installation with a cooler embodying myinvention supporting the tuyre;

' Fig. 2 is a rear end view of the cooler embodying my invention;

Fig. 3 is a longitudinal section therethrough;

and

Fig. 4 is a transverse section in substantially the plane of line IV--IV of Fig. 3. v

In the drawing, 2 designates a portion of thelower part of a blast furnace wall, 3 the cinder bracket thereabout, 4 is the cooler supporting ring, while Sidesignates generally the cooler, and 6` is the tuyre at the inner end of the cooler.

The blow-pipe' for applying air to the tuyreis designated 1, and 8 is the boot-leg on which the blow-pipe is carried, lthe boot-leg'being carried on a connector 9 leadingfrom the bustle pipe III.

The cooler which is shown in detail in Figs. 2,

4 3, and 4 comprises a metal body of generally plane passing longitudinally throughthe cooler,

ent invention provides a coolrin which the air maybe vented so'that it is age due to this cause. i

My invention may be more fully understood by reernce i to the accompanying drawing, in w ic protected `from dam- Fig. 1 represents a section through the wall or bosh of a blast furnace, showing a typical tu'yre cooler.

frusto-conical shape, having a conical-exterior wall II, an inner terminal portion I2 providing a seat for the end of the tuyre, and an inner wallV I3 spaced from the wall I I, there being an annular'chamber I4 between the .walls I3 and II for the circulating of cooling water through the The wall I3 forms a centralopening through `the cooler which is designated I4.

According to the'present invention, the lowerportion of the wall I3, spanning an arc of about 120 is recessed as indicated at I5 throughoutithe greater portion of the length of the cooier,.the recess terminating at I6 at the inner end of the .cooler and having an integral harige I1 formed. thereon' at the outer end of the cooler.

I l This recess extends about 60 each side' of a vertical the side edges of the recess being defined by wall portions i8.

Within the recess is a refractory .or other body I9 which is capable of resisting molten iron or slagthat might fall upon it, and which will serve as a' trough' to carry oi any such iron or slag.

` The refractory body I9 preferably comprises refractory brick set in refractory'cement and completely filling the recess. The forward or inner end of the refractory body I9 terminates at the inner shoulder It, andtheinner end portion of the cooler beyondthe refractoryv is fully circular to provide the annular support or seat l2 for the tuyre which nts into it.v

At numerous places in the outer end face ofthe cooler are tapped openings designated 20,l some of which maybe plugged, and one of whichmay be connected to awater inlet pipe, while another may be connected to a water outlet pipe. InFig.

2, the two .upper openings 20 provide the inlet and outlet passages. In the space I4 between the two openings 20 and extending throughout the full length of the cooler is a partition 2i, so that cooling water entering one of the ports 20 must circulate entirely around the cooler to emerge from the other of these openings. According to the present invention, a small hole 22 is cored transversely through the partition. This will serve to allow any air that might otherwise be trapped in the space I6 to escape, thus further protecting the cooler against the effects of heat. While the hole 22 will allow a small amount of water to flow through the partition, the amount which is by-passed in this way is negligible.

Ordinarily the cooler will be cast from copper, but instead of being made from` copper, it may be made of other metals, including iron, bronze, and aluminum, or any other metals'that may be satisfactory.

The cooler is installed in the furnace the same as a conventional cooler. It has the same exterior shape and dimensions that the conventional cooler has, and it receives the usual standard tuyre. The blow-pipe is connected to the tuyre in the same way. and the coolerdoes not require any special installation or added equipf ment for its use. In the event that metal flows back into the blow-pipe allowing slag or metal to escape, the metal will fall onto the refractory I9 from which it can run oi, oron which it may collect. and the furnace is again in operation,- or while the blow-pipe is being replaced, any damaged refractory, or refractoryto which a mass of metal or slag may be clinging can be taken out and re placed with new refractory. Thus the invention provides a cooler for supporting the tuyre which, in the event of a blows pipe burning through lwith the subsequent escape of metal or slag, repairs can be made quickly and with a minimum loss of time, and without requiring replacement of the cooler as is now frequently necessary where an accident of this kind occurs. Many blast furnaces produce as much as a ton of metal a minute, and the replacement of the cooler may require a shut down for as much as four hours or more. invention, in avoiding the replacement of coolers due to the burning through of blow-pipes,` may of the cooler, thereby tending to increase the` velocity of the cooling water where sedimentation is most likely to occur. lThis is a desirable feature in prolonging the useful life of the cooler.

By forming a recess to receive Vthe refractory,v the refractory is contained inside the cooler in After the blow-pipe has been replaced Consequently, the present Number such manner that it will not interfere with the Passage ofa tuyre into the cooler, or the removal of one tuyre and its replacement by another when it is necessary to change tuyres.

While I have specically illustrated and described one particular embodiment of my invention, it will be understood that various changes and modicati'ons maybe made in the construction of the cooler within the contemplation of my invention, and under the scope of the following claims.

I claim as my invention: y

1. A cooler for' holding a blast furnace tuyre comprising a metal bodyhaving an inner wall forming an inwardly tapering passageway, the cooler having an annular tuyre supporting seat portion at its inner end, the cooler having a channel-like recess formed in the lower portion of its said inner wall member extending from the tuyre engaging portion of the cooler to the outermost end thereof, anda replaceable body of heat resistant material in the recess, the cooler having an outer wall portionl spaced from the inner one and substantially parallel therewith to provide a Water circulating space between the two walls.

2. A cooler for a blast furnace tuyre comprising a frusto-conical double walled body having a water circulating space between the two Walls thereof, a longitudinal baille extending along the top of said water circulating space between the two walls forming a partition'throughout the entire length of the space, said baille having asmall hole therethrough near the larger end of said body, there being a water outlet opening in the structure adjacentl one Iside of the baffle, and means through which water may be introduced into saidrspace. l

3. A tuyre Vcooler comprising a double walled truste-conical body terminating in an inner nose portion and providing between its walls a watercirculating chamber, the inner wall of said body defining a tapering passageway, said inner wall having a radially offset portion rearwardly of `the nose andextending across the lower part only thereof for'receiving and holding a separate refractory panel, the water-circulating space in the bottom of the cooler undery the offset portion being narrowed by the ollset to thereby increase the velocity of the cooling'water in the bottom of the cooler at the point where sedimentation is otherwise most likely to occur.

` SELWYNE P. KINNEY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Y Name Date 613,042 Killeen Oct. 25, 1898 2,124,437

Steinbacher L July 19, 1938

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