US1004085A - Kiln. - Google Patents

Description

L. P. ROSS.

KILN. `APPLIUATION FILED 00T. 31, 1'910.

Patented Sept. 26, 1911.

a SHEETS-HEBT 1 L. P. ROSS.

KILN. APPLICATION FILED 00T. 31, 1910.

Patented` Sept. 26, 1911 i 2 SHEETS-SHEET 2 F/G 7 W/T/VESSES:

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llNlTll FFICE.

LEWS I. ROSS, OF STANDISH, NEW YORK, ASSIG'NOR OF ONE-HALF T0 NDRTHERN IRON COVLPANY, A CORPORATION 0F NEVI KILN.

Application tiled October 3 To all whom it may concern:

lle it known that l, llrwls l?. toss, a citizen of the United States, residing at Stand* ish, in the county ol Clinton and State of New York, have invented certain VImprovea ments in Kilns, ol which the following is a speeilieation.

My invention relates particularly to rotary kilns tor treating tine ore. Vflue dust, cement and like materials which it is desired to nodulate or clinker by a heating and rolling operation.

The primary object ot' mv invention is to prevent the riiiging of kilns or the undesirable adhesion to the kiln liningot the material in process of treatment.

It is also an object to ell'eet a regulated detachment. of material from the kiln lining so that. a lamination may remain to protect such lining 'from thel crosivc action ol the. traveling material, the cutting action ot the llame and wear generally.

ln the operation olf inclined rotary kilns new in use lor modulating tine iron hearine.' material, cenientand the like hy teediug ity through from one end and subjecting it to the action of a llame.introduced at the other end, there islgroat less in time and etlicieucy .due to the adhesion ot the. heated material to the kiln with the formation o'l' an annulus. rapidly increasing in thickness. wherehy the kiln is clicked, the travel ol' the material is obstructed, Vthe heating action is a ll'ected and the operation must he stopped to remove the obstruction.

rIlhe -very considerable kiln lengths required in nodulating and elinkering operations has heen a dilliculty in the way o'l find1 ing lnactieahle means ilor ]n'e'vt.nting ringing, and drags which have heen tried iujure the kiln linings, are expensive because the) are destroyed hy the heat to which they are subjected, and do not rnoduee satisfactory results. .l have succeeded in preventing this objectionable ring formation, while permitting the :formation ol' a limited protectq ingl lamination upon the lining, hy thesimple means of a scraping device, sach as a railway rail, acting nnder control so that it shall ride Within the kiln upon the desired lamination adhering to the lining and scrape therefrom the material which would otherwise huild up the objectionalle annnlus. The scraping device is preferably supported so that it floats, hut it may he held rigidly Specification of Letters Patent.

1, 1910. Serial No. 589,854.

atentetl Sept. 26, 1.9.11.

at one or hoth ends, and it may he protected hy ainr desired refractory material or cooling means.

The elniracteristie features ofiny improvements are more specifically disclosed in the following description and the accompanying drawings in illustration thereof. t

In the drawings, Figure l is a longitudinal sectional elevation ot' a rotary kiln having my improvements applied thereto; Fig. 2 is an enlarged sectional view taken on the line E-2 ot Fig. l; Fig. 3 is an enlarged sectional view taken on the line 3MB of Fig.

l; Fig. lis a perspective view of a section ot' a scraping har having pipes lor carrying a. cooling tluid connected therewith; Fig. is a perspective view ot a section ol' a .second form of scraping har; Fig. t3 is a perspective view o'l' a section of a third form of scraping har; Fig. i is a sectional plan representing an enlargnal view oil' the lower end of the kiln shown in Fig. l: Fig. S is an end nelevation oit the structure shown in Fig. 7 showing the scraping har in section and the hurner removed l `ig. ll is a longil'litlinal ser tional ele.'atim1 having a second lorm 'of my improvements applied thereto; Fig. 10 is an enlarged sectional view taken on the line 10 Afl() ot Fig. t); and Fig. il is an enlarged sectional view taken on the, line 'l1-11 of ["ig. ll.

'lhe mechanism. as illustrated in the drawings, comprises the `inclined kiln l revoluhly supported on theI rollers 2, the flue 2l connecting the higher end of the kiln with the stack -l, the l'eed spout 5 passingvtlnongh the [lue into the upper end ot the kilnpand the hood t3 :l'or closing the lower el'idolf the kiln. the hood being carried hy whee'lst having a limited movement longitudinallyol?` thtl kiln onv the track 8 carried hy the truck t) movable on vthe track 10, A burner, coinprising the gas pipe l1 and the pnlverized `t'uel pipe l2 therein, extends through the hood and projects a llame through the lower end of the kiln, in the reverse direction to the movement otI the materials t'cd therethrough from the spoutl 5, the materials heing gradually heated as they are rolled in passing through the revolvine` kiln. As the materials approach incipient fusion and their adhesion increases, they tend to rise along the lining` ot the kiln to the line a o and from the point o to the point a. the adhesion is such that 1n the asu-al opera-vy tion an annulus a-a rapidly forms` and chokes the kiln.

As illustrated in Figs. 1- -8, the hood 6, is

i provided with a slot 13 concentric With the kiln and a T-bar 14 is passed therethrough into the kiln, the bar terminating inthe kiln at a point adjacent to the. section at which the ring begins to form.: The supported end. of 'the baris disposed suitablyat approximately 45 degrees from the bottoms of the hood and kiln, at theA side toward Which the revolving material` rises-'and is free toride up the side of the kiln lining approximately parallel to the axis of revolution, the bar floating and detach-ing adhering material.

But the bar'may be liked and its-Weight,

character and disposition are subject to regulation, so that in itsaction a layer of the 'materialmay be left adhering to' the kiln lining for its protection or the adhering matter may be 'Wholly removed and the'kiln may be scraped throughout its length.

-The bar is movable through the hood on a roller 1-5 vjournaled thereon 'and is held against longitudinal ,movement4 after' it has.

the heat to which litis subjected. But it is suitably a usual rolled metal shape, as the T-har 14, cooled by Water conduits or pipes 18 iixed'theretoand connected beyond the hood with fieXible hose 19. The iron I-.bar 20, cooled bythe Water pipes 21, and. the' ironX-bar 22, cooled by the' 1a'ff. te.rfpipes .23,

are further examples of suitable scraping' devices.

As illustrated in FigsfQ-l-l, the bar24' extends entirely v through the kiln. form is suitable where the usual kiln'length is shortened as it may be 'with the provision hereof for scraping down and removing the adhering materia-l; This bar is passed a refractory material 1 This" through .the slot 13 of the hood 6 and through the kiln to the bearing 25 provided with the slot 26 Within which the forward end of the bar is supported and adapted .t0

move. Theb'ar is held by the slots at kthe desired distance from the lining ,ofthe kiln and so that it is permitted a limited floating .movement, While it may be held, if desired against longitudinal movement byany suitf able means, as the platesections 16 and 16 .engaged bythe clips17. Duets .19 carry Water'through the bar, the bar being longi- `tudinally movable when thev plate is d emoved in practicing tached and may be so the operation.

It will be evident that 'the foregoingl apparatus may be variously changed to accommodate diii'erent conditions of use, as the matter of the lengt-h of the kiln to be scraped, the manner voi." supportin'gthe scraper and thel method of cooling or protecting thef scraping apparatus.

Having described'my invention I claim 1. The combinationof a rotary kiln, with a floating-scraping bar therein, and means for controlling themovementot said bar.

2.A The combination of a rotary kiln, with a' oating scraping bar' therein, and means for supporting. sa'id bar so that` it is Imovable up 'the side thereofI by the rotation of /said kiln. f' 3. The combination of an inclined rotary kiln, means for introducing materials at the higher end thereof, means for introducing a iiame at the lower end thereof, a floating' 'scraping'bar disposed Within the lower end of saidl kiln,.and means for loosely supporting said bar so that it shall bear against vthe revolving interior surface of said kiln above the bottoni thereof.

In Witness whereof I have hereunto set my nan-1e this 21st day. of October, A. DQ

1910, in the presence of the subscribing Witnesses.

LEWIS P. ROSS.

Witnesses: D. S. LAWSON,

L. H. MOCLELLAN.

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