US2476614A

US2476614A - Slag pocket

Info

Publication number: US2476614A
Application number: US537224A
Authority: US
Inventors: Elmer E Mcvey; John L Tatman; William C Wallis
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-05-25
Filing date: 1944-05-25
Publication date: 1949-07-19
Anticipated expiration: 1966-07-19

Description

July 19, 1949.v E. E. MCVEY ET AL SLAG POCKET 2 sheets-sheet l' Filed May 25, 1944 Jly 19, 1949. E. MC1/EY ET AL 2,476,614

' SLAG POCKET l Filed May 25, 1944 2 Sheets-Sheet 2 Patented July 19, 1949 Elmer E. McVey, John L. 'latin-an, and. Williamr C. Wallis', Steubenville, Ohio Application May 2s, 1944,sena-rNo.637,224V v 4 oraims. (c1...263 45,), Y

1 This 'invention relates to slag pockets 4and partifzztilatlyV slag pockets. of -metallurgicalgfurnaces smh -asregenerative open hearth furnaces. The slag-pockets. of regenerativev open hearth furnaces are chambers atvv the bottoms of the upand, downtake nues. The gases are conducted to and "from furnace through the slag pocketsand during operation of the furnace solid matter (slag) is deposited in the pockets. The slag builds up ,in the pockets and ultimately has to be' cleaned out,

The cleaning out of slag pockets has been most' dicuIt-asithe-slag when deposited is in such con-` dition that the slag particles fuse together into' a more or less solid mass `which adheres to they pocket walls. The cleaning out of a slag pocketv priory to the present invention has entailed a great' deal of w'ork in breaking up and digging out the slag and repairing the pocket walls which are partially or largely destroyed in the' cleaning out process. n

We' provide a slag pocket lolcviating the disadvant-ages of slag pockets as heretofore known and enabling cleaning out of the slag with great' facility. We provide for bodily removing the slag 'npone or more large masses or blocks with a minimum ofwbreaking` up. Our slag `pocket preferably comprises a chamber having inner and outer structurally separate wal-l portions with the inner -wall portion arranged to Contact the slag deposited in the pocket and to beremoved with the" slag when the pocket is cleaned out. The inner wall portion is va temporary wal-l portion structurally' K separate and preferably somewhat spaced from the opposed outer wall'portion which is prefer- -non-structui'al material such as sand or the `like between the wall portions.

Wefnrther provide aslag pocket comprising a chamber having walls" the portions of which above v the norm-al maximum-slag level are permanent and the portions of `which below the normal maximum-slag level have permanent outer parts |and temporary inner parts arranged to Contact the slag deposited in the pocket and to be removed with the slag when the pocket is ycleaned out. 0dr slag pocket also preferably has an endv all removable with the slag. Desirably the slag pocket may' comprise asupporting framework inoluding a generally horizontal wall support disposed above the normalmaXiIm-nn slag level, a permanent-upper wall-structure above and supported-by said supporteanclva double wall structure below said support comprising an `outer permanent wall portion land an inner temporary wall =portion arranged to contact the slag deposited in the pocket. andto lee removed with the slag when;

Aably permanent. We find it desirable to dispose the pocket is cleaned out.

We alsoprovide a 'slag pocket comprising. a chamber having a: wall; extending thereacross toI ,4 divide. thepocket intoa; pluralityv of slag receiving spacesrsaid wall being lfragile to facilitate separate removal of' thefslagin the respective spaces andb'eing adapted 4to, be., destroyed `upon' such' 'fre-- mover, l?referaldixy-v thewal'l extending-` acrosstne' pocket comprises loosely lai-d up structural massessuc'h as old, brick laid up dry so that such walt isremoved withxthe'slag when they pocketis 'cleaned-out. c We: still furtherprovide1 a' slag pocket having douhleiside wallvporti'ons :andra Wall extending thereacrosa. the inner-parts of. thedouble side wall Aportions and: thev walk extending acrossthe pocketbeing arranged; to contact the slag.y dee' positedv in the pook-et-fandA to be removed with the slag when-the pocket. vis cleaned out.

Other details, objects `and. advantagesv of vthe invention will-become apparent as:v ther followingdescrption of a present vpreferred embodiment; thereof;y proceeds.

v/In the accompanying .drawings we haveslnown.- a present preferred embodiment of the-invention, inv` 'which Figure l is a1 vertical cross-sectional. View through thefgas-andlair slag pockets of a regen-f4 erative openhearth furnace;

l'eigure is a horizontal vcross-sectional view takenfon the line II-II of Figure 1; yand ,Figures 3 and 4 are perspective more or less:y diagrammatic viewsillustrating how slag isere-- moved from our improvedrslagV pocket. Y .Referring` now more particularly to the drawings, thereareshown in Figures land 2 a gas slag.` poeket' and an air slagpocket 3 of a-regenera-f tive Aopenl hearth vffurnaee, 'which furnace except for the construction of the slagpockets may beY i 'The `furnace-is constructed with a supportingv framework! which comprises uprights 1 .and horizontal members 8. An upright a and hori-A zontalfmembers l0 are positioned betweenthe

slagpockets

2 and 3. The uprights I carry chan-y nels H which cooperate `with the upper horizonnl tal member lli Vto support the brick of an arch l2,` over the gas slag pocket 2 and an varch I3 overj theair slag pocket 3i y The .uprights 'l and 9 also carry water cooled angles which support the wall portions lli-,ofl the slag c pockets which lie tlereabove. y A `arches 'l2' and 3 and the wall portions I5 abovej The' the angles I4 are of permanent structure and are built up of refractory brick.

Below the angles I4 the slag pocket Walls have outer permanent portions I6 and inner temporary portions I1. The inner temporary portions I 'I are made of refractory brick and the outer portions I6 are also of brick, preferably refractory, although in some cases a cheaper brick may be used. The temporary inner wall portions Il are arranged to contact the slag deposited in the pockets and to be removed with the slag when Y the pockets are cleaned out as will presently be described. Wall portions I6 and II are struc turally separate and are preferably spaced apart as shown, non-structural material such -as Ysand or the like I8 being disposed therebetween.

The slag pocket 2 has a permanent inner end 1 wall I9 of refractory brick and the slag pocket 3 has -a permanent inner end wall 20 of refractory brick. The :outer end Walls of the

slag pockets

2 and 3 are shown at ZI and 22, respectively. These walls are built up of refractory brick and, like the wall portion II, are arranged to contact the slag deposited in the pockets and to be removed with the slag when the pockets are cleaned out.

The angles I4 are disposed slightly above the normal maximum slag level, which is roughly the level of the top of the non-structural material I8. It is contemplated that normally the arches I2 and I3 and the wall portions I5, I6, I9 and 20 are not disturbed in cleaning out of the slag which accumulates in the slag pockets, being removed with the slag as will be described.

rIhe pockets preferably have walls extending thereacross to divide them into a plurality of slag receiving spaces, such walls being fragile to facilitate separate removal' of the slag in the respective spaces and being adapted to' be destroyed or removed with the slag when the slag is cleaned out. One such wall is shownfragmentarily at 25 in Figures 3 and 4. It is built up of old brick laid up dry. Another such wall is indicated at 24.

When it is desired to clean out the slag pockets the wall portions II are broken through adjacent the top of the non-structural material I8 and also adjacent the end walls 2| and 22. This may be done by usinga pneumatic drill. Figure 3 is a diagrammatic perspective view through the air slag pocket 3 but as though the wall 22 had been removed, thus exposing the interior of the pocket. When the wallportions I v'I have been broken through as above mentioned the slag together with the wall portions I'I and the walls 2I and 22 may be removed in large chunks or blocks without the necessity of the slag being broken up and shoveled out. Preferably the slag in each of the pockets is removed in three blocks, the blocks being preferably determined by the

transverse walls

25 and 24. VThe wall 25 may be broken up by the pneumatic drill anda chain or cable may be placed around the outer mass or block of slag and the slag may be pulled out by any suitable source of power. The second mass or block of slag between the

walls

25 and 24 may be similarly removed, and, finally, the third mass or block of slag between the wall 24 and the inner wall of the pocket may be similarly removed. Due to the provision of the non-structural material I 8 between the inner wall portions I'I and the outer permanent lower wall portions I6 the chain or cable may easily be laid in between the wall portions I'I and I 6. Figure 4 shows at 23 how the wall portions I'I are broken through adjacent the top of the non-structural material I8v and just below the water-cooled angles I4. This provides an opening into the space occupied by the non-structural material I8. The slag is removed in roughly cubical chunks five to six feet on an edge. In Figure 4 one such chunk has been removed and the Work toward preparing the second chunk for removal is under way.

lAfter the slag pockets have been cleaned out the temporary wall portions I 1, 24 and 25 and the l0 end walls 2| and 22 are rebuilt, the permanent vportions I2, I3, I5, I6, I9 and 20 remaining undisturbed unless their repair is necessary for some other reason.

While We have shown and described a present preferred embodiment of the invention it is to be distinctly understood that the invention is not limited hereto but may be otherwise variously embodied within the scope of the following claims.

We claim:

l. Aslag pocket comprising a supporting framework including a generally horizontal wall support disposed above the normal maximum slag level, a permanent upper wall structure above and supported by said support and a double wall structure below said support comprising an outer permanent wall portion and an inner temporary Wall portion arranged to contact the slag deposited in the pocket and to be removed with the slag when the pocket is cleaned out.

2. A slag pocket having an upper portion and a lower portion, the lower portion of the Wall having a permanent outer part and a temporary inner part adapted to be removed with the slag and the upper portion of the wall being permanent and having its inner part disposed directly above the temporary inner part of the lower portion and with its bottom in contact with the top of the temporary inner part of the lower portion. i 3. A sla-g pocket having a permanent generallyv upright wall portion relatively thin at its lower part and relatively thick at its upper part and projecting farther inwardly at its upper part than at its lower part and a temporary wall portion adapted to be removed with the slag dis-4 posed directly beneath the inwardly projectingupper part of the permanent wall portion, the, inner face of the temporary Wall portion being flush with the inner face of the upper part of' the permanent wall portion.

4. A slag pocket having a base and an in situ built up wall extending upwardly continuously. from the base and having an upper portion and a lower portion, the lower portion of the wall having a permanent outer part and a temporary inner part adapted to be removed with the slag, the upper portion of the wall being permanent.

ELMER E. McV'EY. JOHN L. TATMAN.

WILLIAM C. WALLIS.

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

UNITED STATES PATENTS Number Name Date 1,200,839 Holzworth Oct. 10, 1916 1,288,328 Whalen Dec. 17, 1918; 1,303,225 Abel May 13, 1919 7 1,427,862 Y smith sept. 5, 1922 1,445,679 Gray Feb. 20,- 1923,- 1,795,959 McLimans Mar. 10, 1931- 2,130,925 Johnston Sept. 20, 1938v Certificate of Correction Patent No. 2,476,614 y July 19, 1949 ELMER E. MCVEY ET AL. It is hereby certified that erroi` appears in the printed specification of the above numbered patent requiring correction as follows:

Column 4, line 30, after the Word pocket insert having 'a wall; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of Signed and sealed this 3rd day of J the oase in the Patent Office. anuary, A. D. 1950.

THOMAS F. MURPHY,

Assistant Uommssioner of Patents.