CA1200380A - Apparatus for cooling metallurgical furnace wall - Google Patents
Apparatus for cooling metallurgical furnace wallInfo
- Publication number
- CA1200380A CA1200380A CA000406590A CA406590A CA1200380A CA 1200380 A CA1200380 A CA 1200380A CA 000406590 A CA000406590 A CA 000406590A CA 406590 A CA406590 A CA 406590A CA 1200380 A CA1200380 A CA 1200380A
- Authority
- CA
- Canada
- Prior art keywords
- heat conductivity
- layer
- cooling
- plate
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
- F27D2009/0032—Cooling of furnaces the cooling medium passing through a pattern of tubes integrated with refractories in a panel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Blast Furnaces (AREA)
Abstract
APPARATUS FOR COOLING METALLURGICAL
FURNACE WALL
Abstract of the Disclosure An apparatus comprises a two-layer plate composed of a layer having a low heat conductivity and a layer having a high heat conductivity. Built in said plate are at least two cool-ing metal pipes in spaced relationship relative each other.Said cooling pipes are disposed so that the interface of the plate layers insersects the cavity of the cooling pipes in the longi-tudinal direction substantially in parallel to the plane of the plate and displaced relative the longitudinal centre-line plane of the cooling pipes towards the layer having low heat conducti-vity.
Such construction of the proposed apparatus makes it pos-sible to prolong to a great extent the service life thereof and simultaneously improve a gas tightness of the apparatus and the efficiency of cooling a furnace wall.
FURNACE WALL
Abstract of the Disclosure An apparatus comprises a two-layer plate composed of a layer having a low heat conductivity and a layer having a high heat conductivity. Built in said plate are at least two cool-ing metal pipes in spaced relationship relative each other.Said cooling pipes are disposed so that the interface of the plate layers insersects the cavity of the cooling pipes in the longi-tudinal direction substantially in parallel to the plane of the plate and displaced relative the longitudinal centre-line plane of the cooling pipes towards the layer having low heat conducti-vity.
Such construction of the proposed apparatus makes it pos-sible to prolong to a great extent the service life thereof and simultaneously improve a gas tightness of the apparatus and the efficiency of cooling a furnace wall.
Description
U! 3~
APP~ U~ FOR COOLING luI~'A~KGICA~ ~URNA~ WAL~
The present invention relates to the m~tallur~y, and particularly is concerned with an apparatus ~or cooling a me-tallurgical furnace wall~
'~he inve~tion is of par-ticular advantage in the case o~ a shaft furnac~.
Although appara~uses ~or cooling the wal~s of metallur-gical furnaces have been known relatively long ago, a~ appara-tus for cooling a metallurgical furnace wall, which would be simple in manufac-ture a~d reliable in operatio~, and also feature a long ~ervice life~ has not been developed so far~
'r`here are known apparatuses for cooling a metallurgical furnace wal~ (cfc USSR Author's Certifica-te ~o 506,466~ pub lished 15 March 1976, and U~SR Author's Certi~icate No 545,676, published 5 Februar~ 1977; Andoniev S.~. Isparitel~oe ohla~h~e nie metallurgiches~ pechei, M., ~ashinostroe~ie, 1970, pp.
132-140) which comprise a cast iron plate and disposed there-in cooling steel pipes. Hereina~tex the term "cooling pipes~' is used to mean the pipes through which a coolant circu~ates and which ar~ adapted to remove heat ~rom the wall o~ a me~
tallurgical ~ur~ace.
~ he plates wi-th the cooling pipes dispos~d therein are mounted around~the pariphery of the furnace wall and secur~d ~o the jacket thereof~ The above apparatus operates under the condition o~ sharpl~ varying thermal stresses arising during operatio~ of ~he ~urnace. ~his ~eadæ to a thermal fatigue o~ the cast iron plate and as a result to the forma~ion o~
cracks -therein, in which craGks graphite deposits, thereby ~3~3~3~
~urthering irac~ure of -the cas-t iron. Furthermore, said cast iron plate has a relatlvely great thickness and during operation of`
the metallur~ical furnace the temperature of ~he exposed sur~ace of said plate varies in the range from 400 to 900~C. '~his cau-ses irreversible expansion o~ the cast iron plate, which impa-irs the mechanical properties of the cast iron and leads~ as a result, ~o a~ increased rate of abrasion weax thereof by -the charge a~d gas f`low con-taining solid particles.
l'he above appa~atus for cooling a metallurgical furnace wall is labour-consuming in man~`actule. Its manu~acture invol-ves making a casting mouldt care~ullg treating the surface oY
the steel pipes be~ore casting molten me-tal (cleani~g, applying aluminium pain~t and quartz powcler) and drying, mounting the pipes in the mould~ etc. Furthermore, a~ter the casting mould with the pipes secured therein is filled wi-th a molten iron there takes place a partial carbonization of the steel base of the pipes and the growth of the grains of said bteel base~
which considerably a~ects the strength and plasticit~ o~ -the cooling pipes.
~ here is also known an apparatus for cooli~g a metallur-gical ~urnace wall which partially removes the above disadvan-ta~es (c~. US Patent ~o 4,154,1759 pu~lished 15 May, 1979).
~his apparatus comprises a two~layer plate eomposed of a low heat conductivity and a high heat conductivity layers~ Into the plate are built at least two coolin~ metal pipe~ so as to ~orm a space therebetween. r~he interface o~ -the plate layer~
intersects the hollow o~ said pipes alon~ their ceh~reline p~ane substantially in parallel ~o the pla-te surface.
Said plate wi~h the cooling pîpes built therein is ~as-tenad on the jacket o~ a furnace so th~t the pipes are loca-ted close to the jacke-t o~ the Eurnace and substantially in parallel to the longitudinal generatri:~ thereo~ `he low heat conductivity layer is located outwardly o~ the furnace cham-ber, i~e. on the side of the furnace jac~et, ~nd the high heat co~duc-tivity l~yer is located i~wardly o~ the ~urnace chamber, i.eO e~posed there-to~
'~he above apparatus was manu~actured in the ~ollowing ma~ner. l'he plate layers were cast separately: the high heat conductivity layer was cast from a cast iron, and the low heat conductivit~ layer was cast from a heat~resistant concrete and provided with reeesses for the cooling pipesO '~he cooling pipes were placed in said recesses and the layers of -the pla~
te with the coolîng metal pipes in said recesses were bo~ded with the use o~ tie bo~-ts.
While manufacturing such cooling apparatus the strength and ~lasticity o~ the cooling pipes are no-t a~ected~ since due to such construction of the apparatus -the conditions which may cause carbonization o~ the steel base o~ the pipe and the growth o~ the grains o~ said steel during the ma~u~act~re are rul~d out. I~ addition, the manu~acturing prOC2SS of the appar~tus has also been simplified to some e~tent.
~ Iowever, in most cases, when the appax~tus is assembled, a ti~ht adjoining o~ the p~ate layers ~nd cooling pipes in the plane o~ their co~tact ~ailed to be obtained, u~hich re-$~
sults in a lower e~`ficiency of` coo`ling -the f'urnace wa~l~
~ i'urthermore~ the high heat conduc~~ivi-ty laye~ (o~ cast iron) has a rela-tlvel~ large -thicKness~which under the conditions o~
sharp~y var~ing temperature may lead -to the forrnation of cracks and ~racture of said layer~ Because -the inter~'ace Q~ the pla-te ~yers coincides wi-th the longitudinal centre-line plane of' the cooling pipes the plate collapses in the end ixrespec-tive of the presence of' the tie bol-ts. After frac-turing and breaking-o~ o~
the high hea-t conduc-tivity layer ~he 'blast-furnace ~as under pressura begins to escape through the cracks in the low heat ,conduc-tivit~ layer and coming~ in con~tact with Ghe aacket of' the furnace heats the latter,thereby causing the de~`ormation thereof.
~ hus9 the above apparatus for cooling a metallurgical ~urna-ce wal~ features a relatively short service ~ife~ low gas tight-ness and doe~ not provide a high e~iciency in cooling a ~urnace wall.
The principal object of the inven~io~ is to increase the service li~e of the ~ppara-tus.
Anothar object of the invention is ,to improve the gas tight ness o~ the appara-tus and i~prove the ef~icienc~ o~ cooling a , ~urnace wall.
Still arlother objec-t of the invention is ~o improve the re liability of fastening o~ -the pl~te layers to one another.
Yet another object of the invention is to lower a labour consumption and production cost of the apparatus.
These a~d other objects of the invention are attained in that an apparatus for cooling a metallurgical fur~ace wall, comprising a two-layer pla-te composed of a `low hea-t conductivity layer and a hi~h heat conductivit~
'layer, at least two cooling metal pipes bui~t in said , ~2~
pla-te in spacad relationship so that inter~ace of the pla~e layers intersects -the hollow o~ said pipes in the longitudinal direction substantially in parallel to bhe plane of the plate, according -to the invention the interface of the plate layers is displaced reLative the longitudinal centre-llne plane towards the low heat conductivity layer~
Such structural arrangement of the pla~e layers allows the high heat conductivi-tg layer to be reliably secured on -the surface of the cooling pipe and the presence of an air space between -the plate layers and the surfaces of the cooling pipes to be eliminated, which considerably improves the efficienc~
of cooling of the furnace wall. ~ll this resu`lts in a longer service life o~ the apparatus. In addition, less metal is re-quired ~or manufacturing such apparatuses since the sur~ace of the hi~h heat conductivity layer at leas~ does not extend beyond the generatxi~ of the cooling pipe. r~hus, the thick-ness o~ the hi~h heat conductivit~ layer is considerablg de-creased and the temperature of said layer under the condiGions of sh~r~ly varying temper~tures is decreased (to ~50C) and cracks do not ~orm, r~his considerably improves ~he ~as tight-ness of -the a~paratus, and also permits the dimensions and w~igh-t thereof to be decreased? thereby imp~ovin~ the effici-encg of cooling.
It is expedient that the in*erface of the plate layers be displaced to an amount of from 0.180 to 0~318 the external diameter of the coolin~ pipe~ If the i~terface of said layers is displaced to the distance which is less than 0.180 the ex-ternal diarneter, the high heat conductivi-ty layer of the pla-te may in some case~ scale o~f which impairs the reliability of` -the apparatus and decreases the service ~i~e thereofO When the amount of displacemexl-t of said interface exceeds 00~18 the e~ternal di~neter o~ the cooling pipe, the thickness o~ the low heat conductivity layer decreases, which even-tually may lead to overheating of the jacket o~ the ~urnace, thereby causing i-ts deformation and failure.
~ hexefore, a modification o~ the proposed apparatus where in the low heat conductivit~ l~yer of the pla~e is made from a heat-resistant concrete9 and the high he~t conductivity layer is made from a metal material selected ~rom steel, aluminium--co~taining cast iron, or spheroidal gxaphite cast iron, is the most reliable in operatlon a~d shows~he long~est service li~eff ~he use of the heat-resistant concrete in the low heat conductivity layer of the plate ensures that even in case the high heat conduc-ti~ity ~ayer is out of order the jacket of the ~urnace is prevented from being overheated. ~t the same time the use of steel 9 aluminium-co~taining cast iron, a~d spheroi~
dal graphite cast iron in -the high heat conductivity layer allows the coolin~ pipes to be prevented ~rom carbonization during the manu~acture of the proposed apparatus.
~ o ensure a re~iable fas-tening of the layers o~ the pla~
te to each other it is eæpedient that the low hea-t con~uctivity layer of -the plate be jQined with the high heat conductivity ~a~er with the aid of reinforcing inserts~
It is expedient that the reinforcing inserts be made in the form of truncated conical projec~ions on the high heat conductivity layer inserted into through conical holes provi-ded in the low .heat cond~1ctivit~y layex3 wi-th ~he sma~lest diameter ends of said truncated conica~ projections being di-rected to the high heat conductivity layer4 Such connection o~ the layers of the plate enables scaling-off and ~reaking--o~f o~ the high heat conductivity layer to be practically rule~ out, which provides f'or the pro-tection of the cooling pipes f'rom a direct action of the high temperatures arising in ~he melting chamber,of the furnace. All this ensures a high reliability o~ the proposed apparatus in operation and ~onger service life, It is ~urnace expedien-t that the larger diameter of each tru~cated conical projection of the hea-t conductivity la~er be in the range fxom 0O5 to 3.0 -the thickness of the low hea-t-conductivity la~er, and the tapering of said projection be in the range ~rom 1:3 to 1:10. If the larger diameter of the conical projection is less than 0~5 the thickness of the low heat conductivity layer the section size o~ the conical pro-jections is not sufficie.nt to e~sure a reliable fastening o~
the plate layers to one anothe:r. I~ the larger diameter of the conical projections is greater tha~ 3cO the -thickness o~
the low heat conductiYity layer the s~rength o~ the low heat conductivity layer is affected, which eventually ma~ be a reason o~ premature failure of said layer.
In the course of operation of the metallurgical ~urnace the high heat conductivity layer is co~lsta~tly exposed to the -- ~z~
act.ion o~` the charge, causing stresses in the metal o~ the co nical projectio~s along the interface of -the plate ~ayers. In this case a gap is formed betwee~ the surface o~ the conical projections of the high heat conductivity layer and the surface o~ the conical through holes in the low hea-t conductivit~ layer7 and if -the co~icity of the projections is not sufficient (more than 1:10) the bond between two layers oP the plate may be deteriorated, thereby bringing the plate out of' ordexO If the conici-t~ of the projec-tions is too great, (less -than 1:3) the gre~ter difference between the diameter (smaller and larger) may cause a sharp increase in the stresses arising in the metal o~ the high heat conductivity la~er along the inter~ace o~ the plate layers, which may lead to the ~ormatio~ o~ cracks in the conical projections and their breaking awag, thereby deterio-rating the bond between the plate layers.
~ o provide a uni~orm adjoining of the plate layers to one another with a minimum number o~ the conical prQaections it is expedie~t that said conica~ projec-ti.ons be disposed i~ a chequ~r--board order in the spaces betwee~ the cooling pipe~ and equidis-tant ~'rom the axes o~ the adjace~t cooling pipes.
~ here is possible'modi~ication of the proposed apparatus, wherein the two-layer plate with the cooling pipes built ~herein is p~aced in a metal enclosure closed on the side o~ the low heat conductivity layer and open o~ the side o~ the high heat conduc~ivity ~ayer. Said me-tal enclosure simulta~eously serves as a casting mould wherein the proposed apparatus is ass~mbled.
~his metal enclosure prevents ~racture o~ the low hea~ conduc-tivity layex auring the -transport~tio~ and mounting of the appa~
~ 3 ~ ~
r~tus on the jacket o~ the ~urnace~ and protec~ the pla~e fr~m a wearing ac-tîon caused by a descendin~ char~s.
'l'he most corrlpact and conveni.ent in mounting is a modifi-cation o~ the proposed apparatus, wherein -the depth o~ s~id metal enclosuxe is equal at leas-t to -the ex*ernal diameter of the cooling pipes.
~ he invention will now be explained wi-th refexence to embodiments thereo~ which are represented in the accompanying drawings, wherein:
Fig. 1 schematical~y represents a general view o~ a~
apparatus for cooling a metallurgical furnace wall (sho~
without the jacket) accordi~g to the invention;
Fig. 2 is a cross section along line II-II of the propo-sed appar~tus shown in ~lg. 13 including the jacket of the ~urnace wall;
Fig~ 3 schematically represents a modi~ication of the proposed apparatus (shown without ~h~ ~urnace jacket), wherein the la~ers of the plate are co~necte~ to one another with the aid o~ rein~orci~g inserts;
Fig. 4 shows a modi~ication o~ the proposed apparatus shown in ~ig. ~, sec-tion along llne IV-IV, with the furnace a acket being also included;
Fig, 5 is a ~ragme~tary view of the modi~ication o~ -the proposed apparatus shown in ~ig~ 4;
Fig. 6 schematically represents a modification o~ -the proposed apparatus having a rnetal enclosure (shown without the ~urnace jacket);
',3~3~3 -- 'li O
~ ig~ 7 is a section along line VII~'VII of the proposed apparatus shown in Fig. 6, including the :Eurnace jacket.
Refering now to ~igs 1 and 2 of -the accompanying drawings9 an appara-tus f`or cooling a metallurgical f'urnace wall comprises a two~`layer plate 1 composed of a low heat conductivity layer 2 and a high he~-t conductivi-ty layer 3. Built in said pla-te 1 are at least two cooling metal pipes 4. Said pipes 4 are built in the plate 1 so that a space ls provided ~etween the~1 ~he in-ter-face of the ~.ayers 2 and 3 o~ the plate 1, denoted by li.ne 5 (see Fig~ 2) intersec-ts -the cavity of the cooling pipes 4 in the longitudinal direction substantially i.n parallel to the pla~e of ~he pla-te ~nd displaced relative the longitudinal centre-line plane of the cooling pipes towards the low heat conductivi-ty layer by an amount 7'a".
It is advisable that the interface 5 o~ the layers 2 and 3 of the pla-te ~ be displaced by an a~ount "a" constituting from 0.180 to ~31~ of the e~ternal diameter l'D't of the coo~-ing pipe ~, which will ensure more reliable operation of the proposed apparatus~
A modi~ication of the proposed apparatus, wherein the low heat conductivity layer 2 of the pl:ate 1 is rnade from a heat-resistant co~crete, and the high heat conductivity layer is made ~rom a metal material selected from steel, aluminium--containing cast iron, and spheroidal graphite cast iron, has the lo~gest service life.
~ he proposed appara~tus is ma~ufactured with the u e of a preliminarily pro~lded f`ramework at the bottom of' which''the 31~
cooling pipes 4 are secured in spaced relationship~ The f~ame-work was then. fi~led ~i-th a heat-resista~t concrete to for~ the ~ow he~t conductivity layer 2 of a predetermined thickness.
A~ter the co~crete acquires a predetermined streng-th a metal materia~ was cast ovex the layer 2 to form the high heat co~-ductivity layer 3 whose surface did not ex*end at least beyond the generatrix o~ the cooling pipe 4.
~ ter solidifica-tion of the metal layer 3 the two-layer plate ~ with -the cooling pipes ~ bullt therein was removed from the framework? whereafter the apparatus for cooling a metallurgical ~urnace wall was ready ~or mounting and use~
~ he pl~te 1, incorporating the cooling pipes 4 was ~astened-in a conventional m~ner to the jacke-t 6 (see ~ig~2) of the me-tallurgical ~urnace so that the cooling pipes 4 were located close to the jacket 6 substantially in paral`lel to the longitu-dina~ generatrix of the jacket. In this case the low heat con-ductivity layer is located on the side of the jacket 6 and the .
high hear co~ductivity layer on the side o~ the furnace ~elting chambe.r.
Shown in ~igs 3-5 is a modi~ication of the proposed appa~
r~tus wherein the layers 2 and 3 o~ the pla-te 1 are ~astened to one another with the aid o~ rei.n~orcing inse~ts which provide for the most reliable f'astening. ~he reîn~orcing inserts are made in the form o~ truncated conical projections 7 on the high heat conductivity layer 3 o.~ the plate 1~ inserted in-to through conical holes pro~7ided in -the low hea~ conductivity layer 2. ~he smaller diameter en~o~ the -truncated conical projections 7 is directed toward~ the high heat conductivity ~,a~
~ 12 -1ayer 3 o~ the plate 1~
It is to be noted that for convenience the cooling pipes in Fig. ~ are ou-tlined b~ solid lines.
More ~eliable in operation is a modification of the pro~
posed apparatus wherein the lar~er diameter "D" oP each trun-cated conical projection 7 of ~he high heat conduc-tlvity layer of' the plate 1 constitutes ~'rom 0.5 to 3.0 of the thickness "b" of the low heat conductivity layer 2, and the tapering of the projection 7 is in the range ~rom 1:3 to 1:10.
To cause the layers 2 ~ld ~ to be uniforml~ fitted to one another with a minimum number of the conical projection used3 it is expedient that said conical projections 7 be arra~ged in a chequer-board order in -the spaces provided betwee~ the cooling pipes 4 ana equidistant ~rom t~e axes o~ the adjacent pipes 4, as can be seen in ~'ig, ~ of -the accompa~ying drawi~gs.
~ hen manu~`acturing the above modi~ication o~ the propo-sed apparatu~s -through conical holes were made in said layer 2 a~ter a heat resistant concrete has been p'Laced into the fra-mework -to form said low heat conducti~it~ layer 2, whexea~ter a metal was cast to form a high heat conductivity 'Layer 3~ in which case said metal f'illed -the holes in the layer 2 to there-by form conical projections 70 ~ ho~n in ~igs 6 and 7 is a modification of the proposed apparatus which is less labour-consuming in manu~acture and the most reliable in op~ration, mountin~ and transportation.
In this modi~ication the said pLate 1 toge-ther with the cool~
ing pipes 4 is placed into a meta'L encLosure 8, with said .
meta`L enclosure bei.ng c~osed on the side o~ the low heat con-ductivit~ layer 2 and the end ~aces o~ the plate 1, a~d open on the side Q~ the high heat conductivity layer 3.
~ he most compac~ ~ld convenien-t in mounting is a modifi-cation wherein the depth of' the metal enclosure 8 equals a-t least the external diameter "D" of -the cooling pipes 4.
When manuf`acturing this modi~ic~tion of the proposed apparatus the me-tal enclosure 8 is used as a ~ramework, and the cooling pipes 4 are welded to the bottom of said enclosu-re 8.
It shou~d be noted that in each of' the above modlficati-ons o~ the proposed app~ra-tus the cooling pipes 4 are provided with inlet cormection pipes an~ outlet connec~ion pipes 9 and 10 respectively (see ~igs 1.., 3 and 6 o~ -the'accompanying dra wing~ ~he i~let connection pipes 9 are located in the lower portion of the cooling pipes 4, and the outlet connection pipes 10 in the upper poItion thereof'0 'l'he above apparatus oper~tes in the following manner.
~ hrough inlet connection pipes 9 (see Figs 1, 3 and 6) a coolant is delivered under pressure into the cooling~ pipes 4 and then through the ou~let connection pipes is withdrawn outside the ~urnace~ While passing -through the cooling pipQS 4 the coolant is heated b~ -the thermal ~lu~ received through the high he~t conductivit~ layer ~ o~ the plate 1 arld the walls o~ the pipes L~ ~rom the charge and -the gas flow. In thi~ case the coolant cools down the layers 2 a~d 3 o~ the plate 1~ while the low heat conductivity layer 2 in its turn prot~3cts the jacket 6 (see ~igs 2, 4 and 7) of the ~'urnace wall from over-~2~
~ 14 -heatin~
I.n this case o:~ the modi~ication of the appa:ratus sho~m in ~igs 3-5 of the accor~lpanying drawings the cooling pipes 4 and the layers 2 and 3 are heated in accordance with their thermal expansion. This thermal expansion f`avours a tigh-ter adjoining o~ the layers 2 and 3 to one another and to the cooling pipes 4, which improves the heat trans~er~ i.e~ recep-tion of the heat ~lux by the coolantg thereby improving the efEiciency of cool~n~.
In the case o~ the modi~icatio~ o~ the proposed appar~tus shown in ~i~s 6 and 7 of the accompanying drawings, the metal enclosure 8 provides for a higher rigidity o~ the whole appara-tus, -thereby bringing down the rate of abrasion wear of the layer 31 caused by the charge and the gas flow~ In the case o~
formation of cracks in the layers 2 and 3 said metal enclosure 8 prevents their failure.
It is to be understood that the invention has been des cribed her~in in terms o~ particular embodiments and that various modi~ications may be ~ade in the invention withou-t de-parting ~'rom the spirit o~ the ~ollowin~ claims.
APP~ U~ FOR COOLING luI~'A~KGICA~ ~URNA~ WAL~
The present invention relates to the m~tallur~y, and particularly is concerned with an apparatus ~or cooling a me-tallurgical furnace wall~
'~he inve~tion is of par-ticular advantage in the case o~ a shaft furnac~.
Although appara~uses ~or cooling the wal~s of metallur-gical furnaces have been known relatively long ago, a~ appara-tus for cooling a metallurgical furnace wall, which would be simple in manufac-ture a~d reliable in operatio~, and also feature a long ~ervice life~ has not been developed so far~
'r`here are known apparatuses for cooling a metallurgical furnace wal~ (cfc USSR Author's Certifica-te ~o 506,466~ pub lished 15 March 1976, and U~SR Author's Certi~icate No 545,676, published 5 Februar~ 1977; Andoniev S.~. Isparitel~oe ohla~h~e nie metallurgiches~ pechei, M., ~ashinostroe~ie, 1970, pp.
132-140) which comprise a cast iron plate and disposed there-in cooling steel pipes. Hereina~tex the term "cooling pipes~' is used to mean the pipes through which a coolant circu~ates and which ar~ adapted to remove heat ~rom the wall o~ a me~
tallurgical ~ur~ace.
~ he plates wi-th the cooling pipes dispos~d therein are mounted around~the pariphery of the furnace wall and secur~d ~o the jacket thereof~ The above apparatus operates under the condition o~ sharpl~ varying thermal stresses arising during operatio~ of ~he ~urnace. ~his ~eadæ to a thermal fatigue o~ the cast iron plate and as a result to the forma~ion o~
cracks -therein, in which craGks graphite deposits, thereby ~3~3~3~
~urthering irac~ure of -the cas-t iron. Furthermore, said cast iron plate has a relatlvely great thickness and during operation of`
the metallur~ical furnace the temperature of ~he exposed sur~ace of said plate varies in the range from 400 to 900~C. '~his cau-ses irreversible expansion o~ the cast iron plate, which impa-irs the mechanical properties of the cast iron and leads~ as a result, ~o a~ increased rate of abrasion weax thereof by -the charge a~d gas f`low con-taining solid particles.
l'he above appa~atus for cooling a metallurgical furnace wall is labour-consuming in man~`actule. Its manu~acture invol-ves making a casting mouldt care~ullg treating the surface oY
the steel pipes be~ore casting molten me-tal (cleani~g, applying aluminium pain~t and quartz powcler) and drying, mounting the pipes in the mould~ etc. Furthermore, a~ter the casting mould with the pipes secured therein is filled wi-th a molten iron there takes place a partial carbonization of the steel base of the pipes and the growth of the grains of said bteel base~
which considerably a~ects the strength and plasticit~ o~ -the cooling pipes.
~ here is also known an apparatus for cooli~g a metallur-gical ~urnace wall which partially removes the above disadvan-ta~es (c~. US Patent ~o 4,154,1759 pu~lished 15 May, 1979).
~his apparatus comprises a two~layer plate eomposed of a low heat conductivity and a high heat conductivity layers~ Into the plate are built at least two coolin~ metal pipe~ so as to ~orm a space therebetween. r~he interface o~ -the plate layer~
intersects the hollow o~ said pipes alon~ their ceh~reline p~ane substantially in parallel ~o the pla-te surface.
Said plate wi~h the cooling pîpes built therein is ~as-tenad on the jacket o~ a furnace so th~t the pipes are loca-ted close to the jacke-t o~ the Eurnace and substantially in parallel to the longitudinal generatri:~ thereo~ `he low heat conductivity layer is located outwardly o~ the furnace cham-ber, i~e. on the side of the furnace jac~et, ~nd the high heat co~duc-tivity l~yer is located i~wardly o~ the ~urnace chamber, i.eO e~posed there-to~
'~he above apparatus was manu~actured in the ~ollowing ma~ner. l'he plate layers were cast separately: the high heat conductivity layer was cast from a cast iron, and the low heat conductivit~ layer was cast from a heat~resistant concrete and provided with reeesses for the cooling pipesO '~he cooling pipes were placed in said recesses and the layers of -the pla~
te with the coolîng metal pipes in said recesses were bo~ded with the use o~ tie bo~-ts.
While manufacturing such cooling apparatus the strength and ~lasticity o~ the cooling pipes are no-t a~ected~ since due to such construction of the apparatus -the conditions which may cause carbonization o~ the steel base o~ the pipe and the growth o~ the grains o~ said steel during the ma~u~act~re are rul~d out. I~ addition, the manu~acturing prOC2SS of the appar~tus has also been simplified to some e~tent.
~ Iowever, in most cases, when the appax~tus is assembled, a ti~ht adjoining o~ the p~ate layers ~nd cooling pipes in the plane o~ their co~tact ~ailed to be obtained, u~hich re-$~
sults in a lower e~`ficiency of` coo`ling -the f'urnace wa~l~
~ i'urthermore~ the high heat conduc~~ivi-ty laye~ (o~ cast iron) has a rela-tlvel~ large -thicKness~which under the conditions o~
sharp~y var~ing temperature may lead -to the forrnation of cracks and ~racture of said layer~ Because -the inter~'ace Q~ the pla-te ~yers coincides wi-th the longitudinal centre-line plane of' the cooling pipes the plate collapses in the end ixrespec-tive of the presence of' the tie bol-ts. After frac-turing and breaking-o~ o~
the high hea-t conduc-tivity layer ~he 'blast-furnace ~as under pressura begins to escape through the cracks in the low heat ,conduc-tivit~ layer and coming~ in con~tact with Ghe aacket of' the furnace heats the latter,thereby causing the de~`ormation thereof.
~ hus9 the above apparatus for cooling a metallurgical ~urna-ce wal~ features a relatively short service ~ife~ low gas tight-ness and doe~ not provide a high e~iciency in cooling a ~urnace wall.
The principal object of the inven~io~ is to increase the service li~e of the ~ppara-tus.
Anothar object of the invention is ,to improve the gas tight ness o~ the appara-tus and i~prove the ef~icienc~ o~ cooling a , ~urnace wall.
Still arlother objec-t of the invention is ~o improve the re liability of fastening o~ -the pl~te layers to one another.
Yet another object of the invention is to lower a labour consumption and production cost of the apparatus.
These a~d other objects of the invention are attained in that an apparatus for cooling a metallurgical fur~ace wall, comprising a two-layer pla-te composed of a `low hea-t conductivity layer and a hi~h heat conductivit~
'layer, at least two cooling metal pipes bui~t in said , ~2~
pla-te in spacad relationship so that inter~ace of the pla~e layers intersects -the hollow o~ said pipes in the longitudinal direction substantially in parallel to bhe plane of the plate, according -to the invention the interface of the plate layers is displaced reLative the longitudinal centre-llne plane towards the low heat conductivity layer~
Such structural arrangement of the pla~e layers allows the high heat conductivi-tg layer to be reliably secured on -the surface of the cooling pipe and the presence of an air space between -the plate layers and the surfaces of the cooling pipes to be eliminated, which considerably improves the efficienc~
of cooling of the furnace wall. ~ll this resu`lts in a longer service life o~ the apparatus. In addition, less metal is re-quired ~or manufacturing such apparatuses since the sur~ace of the hi~h heat conductivity layer at leas~ does not extend beyond the generatxi~ of the cooling pipe. r~hus, the thick-ness o~ the hi~h heat conductivit~ layer is considerablg de-creased and the temperature of said layer under the condiGions of sh~r~ly varying temper~tures is decreased (to ~50C) and cracks do not ~orm, r~his considerably improves ~he ~as tight-ness of -the a~paratus, and also permits the dimensions and w~igh-t thereof to be decreased? thereby imp~ovin~ the effici-encg of cooling.
It is expedient that the in*erface of the plate layers be displaced to an amount of from 0.180 to 0~318 the external diameter of the coolin~ pipe~ If the i~terface of said layers is displaced to the distance which is less than 0.180 the ex-ternal diarneter, the high heat conductivi-ty layer of the pla-te may in some case~ scale o~f which impairs the reliability of` -the apparatus and decreases the service ~i~e thereofO When the amount of displacemexl-t of said interface exceeds 00~18 the e~ternal di~neter o~ the cooling pipe, the thickness o~ the low heat conductivity layer decreases, which even-tually may lead to overheating of the jacket o~ the ~urnace, thereby causing i-ts deformation and failure.
~ hexefore, a modification o~ the proposed apparatus where in the low heat conductivit~ l~yer of the pla~e is made from a heat-resistant concrete9 and the high he~t conductivity layer is made from a metal material selected ~rom steel, aluminium--co~taining cast iron, or spheroidal gxaphite cast iron, is the most reliable in operatlon a~d shows~he long~est service li~eff ~he use of the heat-resistant concrete in the low heat conductivity layer of the plate ensures that even in case the high heat conduc-ti~ity ~ayer is out of order the jacket of the ~urnace is prevented from being overheated. ~t the same time the use of steel 9 aluminium-co~taining cast iron, a~d spheroi~
dal graphite cast iron in -the high heat conductivity layer allows the coolin~ pipes to be prevented ~rom carbonization during the manu~acture of the proposed apparatus.
~ o ensure a re~iable fas-tening of the layers o~ the pla~
te to each other it is eæpedient that the low hea-t con~uctivity layer of -the plate be jQined with the high heat conductivity ~a~er with the aid of reinforcing inserts~
It is expedient that the reinforcing inserts be made in the form of truncated conical projec~ions on the high heat conductivity layer inserted into through conical holes provi-ded in the low .heat cond~1ctivit~y layex3 wi-th ~he sma~lest diameter ends of said truncated conica~ projections being di-rected to the high heat conductivity layer4 Such connection o~ the layers of the plate enables scaling-off and ~reaking--o~f o~ the high heat conductivity layer to be practically rule~ out, which provides f'or the pro-tection of the cooling pipes f'rom a direct action of the high temperatures arising in ~he melting chamber,of the furnace. All this ensures a high reliability o~ the proposed apparatus in operation and ~onger service life, It is ~urnace expedien-t that the larger diameter of each tru~cated conical projection of the hea-t conductivity la~er be in the range fxom 0O5 to 3.0 -the thickness of the low hea-t-conductivity la~er, and the tapering of said projection be in the range ~rom 1:3 to 1:10. If the larger diameter of the conical projection is less than 0~5 the thickness of the low heat conductivity layer the section size o~ the conical pro-jections is not sufficie.nt to e~sure a reliable fastening o~
the plate layers to one anothe:r. I~ the larger diameter of the conical projections is greater tha~ 3cO the -thickness o~
the low heat conductiYity layer the s~rength o~ the low heat conductivity layer is affected, which eventually ma~ be a reason o~ premature failure of said layer.
In the course of operation of the metallurgical ~urnace the high heat conductivity layer is co~lsta~tly exposed to the -- ~z~
act.ion o~` the charge, causing stresses in the metal o~ the co nical projectio~s along the interface of -the plate ~ayers. In this case a gap is formed betwee~ the surface o~ the conical projections of the high heat conductivity layer and the surface o~ the conical through holes in the low hea-t conductivit~ layer7 and if -the co~icity of the projections is not sufficient (more than 1:10) the bond between two layers oP the plate may be deteriorated, thereby bringing the plate out of' ordexO If the conici-t~ of the projec-tions is too great, (less -than 1:3) the gre~ter difference between the diameter (smaller and larger) may cause a sharp increase in the stresses arising in the metal o~ the high heat conductivity la~er along the inter~ace o~ the plate layers, which may lead to the ~ormatio~ o~ cracks in the conical projections and their breaking awag, thereby deterio-rating the bond between the plate layers.
~ o provide a uni~orm adjoining of the plate layers to one another with a minimum number o~ the conical prQaections it is expedie~t that said conica~ projec-ti.ons be disposed i~ a chequ~r--board order in the spaces betwee~ the cooling pipe~ and equidis-tant ~'rom the axes o~ the adjace~t cooling pipes.
~ here is possible'modi~ication of the proposed apparatus, wherein the two-layer plate with the cooling pipes built ~herein is p~aced in a metal enclosure closed on the side o~ the low heat conductivity layer and open o~ the side o~ the high heat conduc~ivity ~ayer. Said me-tal enclosure simulta~eously serves as a casting mould wherein the proposed apparatus is ass~mbled.
~his metal enclosure prevents ~racture o~ the low hea~ conduc-tivity layex auring the -transport~tio~ and mounting of the appa~
~ 3 ~ ~
r~tus on the jacket o~ the ~urnace~ and protec~ the pla~e fr~m a wearing ac-tîon caused by a descendin~ char~s.
'l'he most corrlpact and conveni.ent in mounting is a modifi-cation o~ the proposed apparatus, wherein -the depth o~ s~id metal enclosuxe is equal at leas-t to -the ex*ernal diameter of the cooling pipes.
~ he invention will now be explained wi-th refexence to embodiments thereo~ which are represented in the accompanying drawings, wherein:
Fig. 1 schematical~y represents a general view o~ a~
apparatus for cooling a metallurgical furnace wall (sho~
without the jacket) accordi~g to the invention;
Fig. 2 is a cross section along line II-II of the propo-sed appar~tus shown in ~lg. 13 including the jacket of the ~urnace wall;
Fig~ 3 schematically represents a modi~ication of the proposed apparatus (shown without ~h~ ~urnace jacket), wherein the la~ers of the plate are co~necte~ to one another with the aid o~ rein~orci~g inserts;
Fig. 4 shows a modi~ication o~ the proposed apparatus shown in ~ig. ~, sec-tion along llne IV-IV, with the furnace a acket being also included;
Fig, 5 is a ~ragme~tary view of the modi~ication o~ -the proposed apparatus shown in ~ig~ 4;
Fig. 6 schematically represents a modification o~ -the proposed apparatus having a rnetal enclosure (shown without the ~urnace jacket);
',3~3~3 -- 'li O
~ ig~ 7 is a section along line VII~'VII of the proposed apparatus shown in Fig. 6, including the :Eurnace jacket.
Refering now to ~igs 1 and 2 of -the accompanying drawings9 an appara-tus f`or cooling a metallurgical f'urnace wall comprises a two~`layer plate 1 composed of a low heat conductivity layer 2 and a high he~-t conductivi-ty layer 3. Built in said pla-te 1 are at least two cooling metal pipes 4. Said pipes 4 are built in the plate 1 so that a space ls provided ~etween the~1 ~he in-ter-face of the ~.ayers 2 and 3 o~ the plate 1, denoted by li.ne 5 (see Fig~ 2) intersec-ts -the cavity of the cooling pipes 4 in the longitudinal direction substantially i.n parallel to the pla~e of ~he pla-te ~nd displaced relative the longitudinal centre-line plane of the cooling pipes towards the low heat conductivi-ty layer by an amount 7'a".
It is advisable that the interface 5 o~ the layers 2 and 3 of the pla-te ~ be displaced by an a~ount "a" constituting from 0.180 to ~31~ of the e~ternal diameter l'D't of the coo~-ing pipe ~, which will ensure more reliable operation of the proposed apparatus~
A modi~ication of the proposed apparatus, wherein the low heat conductivity layer 2 of the pl:ate 1 is rnade from a heat-resistant co~crete, and the high heat conductivity layer is made ~rom a metal material selected from steel, aluminium--containing cast iron, and spheroidal graphite cast iron, has the lo~gest service life.
~ he proposed appara~tus is ma~ufactured with the u e of a preliminarily pro~lded f`ramework at the bottom of' which''the 31~
cooling pipes 4 are secured in spaced relationship~ The f~ame-work was then. fi~led ~i-th a heat-resista~t concrete to for~ the ~ow he~t conductivity layer 2 of a predetermined thickness.
A~ter the co~crete acquires a predetermined streng-th a metal materia~ was cast ovex the layer 2 to form the high heat co~-ductivity layer 3 whose surface did not ex*end at least beyond the generatrix o~ the cooling pipe 4.
~ ter solidifica-tion of the metal layer 3 the two-layer plate ~ with -the cooling pipes ~ bullt therein was removed from the framework? whereafter the apparatus for cooling a metallurgical ~urnace wall was ready ~or mounting and use~
~ he pl~te 1, incorporating the cooling pipes 4 was ~astened-in a conventional m~ner to the jacke-t 6 (see ~ig~2) of the me-tallurgical ~urnace so that the cooling pipes 4 were located close to the jacket 6 substantially in paral`lel to the longitu-dina~ generatrix of the jacket. In this case the low heat con-ductivity layer is located on the side of the jacket 6 and the .
high hear co~ductivity layer on the side o~ the furnace ~elting chambe.r.
Shown in ~igs 3-5 is a modi~ication of the proposed appa~
r~tus wherein the layers 2 and 3 o~ the pla-te 1 are ~astened to one another with the aid o~ rei.n~orcing inse~ts which provide for the most reliable f'astening. ~he reîn~orcing inserts are made in the form o~ truncated conical projections 7 on the high heat conductivity layer 3 o.~ the plate 1~ inserted in-to through conical holes pro~7ided in -the low hea~ conductivity layer 2. ~he smaller diameter en~o~ the -truncated conical projections 7 is directed toward~ the high heat conductivity ~,a~
~ 12 -1ayer 3 o~ the plate 1~
It is to be noted that for convenience the cooling pipes in Fig. ~ are ou-tlined b~ solid lines.
More ~eliable in operation is a modification of the pro~
posed apparatus wherein the lar~er diameter "D" oP each trun-cated conical projection 7 of ~he high heat conduc-tlvity layer of' the plate 1 constitutes ~'rom 0.5 to 3.0 of the thickness "b" of the low heat conductivity layer 2, and the tapering of the projection 7 is in the range ~rom 1:3 to 1:10.
To cause the layers 2 ~ld ~ to be uniforml~ fitted to one another with a minimum number of the conical projection used3 it is expedient that said conical projections 7 be arra~ged in a chequer-board order in -the spaces provided betwee~ the cooling pipes 4 ana equidistant ~rom t~e axes o~ the adjacent pipes 4, as can be seen in ~'ig, ~ of -the accompa~ying drawi~gs.
~ hen manu~`acturing the above modi~ication o~ the propo-sed apparatu~s -through conical holes were made in said layer 2 a~ter a heat resistant concrete has been p'Laced into the fra-mework -to form said low heat conducti~it~ layer 2, whexea~ter a metal was cast to form a high heat conductivity 'Layer 3~ in which case said metal f'illed -the holes in the layer 2 to there-by form conical projections 70 ~ ho~n in ~igs 6 and 7 is a modification of the proposed apparatus which is less labour-consuming in manu~acture and the most reliable in op~ration, mountin~ and transportation.
In this modi~ication the said pLate 1 toge-ther with the cool~
ing pipes 4 is placed into a meta'L encLosure 8, with said .
meta`L enclosure bei.ng c~osed on the side o~ the low heat con-ductivit~ layer 2 and the end ~aces o~ the plate 1, a~d open on the side Q~ the high heat conductivity layer 3.
~ he most compac~ ~ld convenien-t in mounting is a modifi-cation wherein the depth of' the metal enclosure 8 equals a-t least the external diameter "D" of -the cooling pipes 4.
When manuf`acturing this modi~ic~tion of the proposed apparatus the me-tal enclosure 8 is used as a ~ramework, and the cooling pipes 4 are welded to the bottom of said enclosu-re 8.
It shou~d be noted that in each of' the above modlficati-ons o~ the proposed app~ra-tus the cooling pipes 4 are provided with inlet cormection pipes an~ outlet connec~ion pipes 9 and 10 respectively (see ~igs 1.., 3 and 6 o~ -the'accompanying dra wing~ ~he i~let connection pipes 9 are located in the lower portion of the cooling pipes 4, and the outlet connection pipes 10 in the upper poItion thereof'0 'l'he above apparatus oper~tes in the following manner.
~ hrough inlet connection pipes 9 (see Figs 1, 3 and 6) a coolant is delivered under pressure into the cooling~ pipes 4 and then through the ou~let connection pipes is withdrawn outside the ~urnace~ While passing -through the cooling pipQS 4 the coolant is heated b~ -the thermal ~lu~ received through the high he~t conductivit~ layer ~ o~ the plate 1 arld the walls o~ the pipes L~ ~rom the charge and -the gas flow. In thi~ case the coolant cools down the layers 2 a~d 3 o~ the plate 1~ while the low heat conductivity layer 2 in its turn prot~3cts the jacket 6 (see ~igs 2, 4 and 7) of the ~'urnace wall from over-~2~
~ 14 -heatin~
I.n this case o:~ the modi~ication of the appa:ratus sho~m in ~igs 3-5 of the accor~lpanying drawings the cooling pipes 4 and the layers 2 and 3 are heated in accordance with their thermal expansion. This thermal expansion f`avours a tigh-ter adjoining o~ the layers 2 and 3 to one another and to the cooling pipes 4, which improves the heat trans~er~ i.e~ recep-tion of the heat ~lux by the coolantg thereby improving the efEiciency of cool~n~.
In the case o~ the modi~icatio~ o~ the proposed appar~tus shown in ~i~s 6 and 7 of the accompanying drawings, the metal enclosure 8 provides for a higher rigidity o~ the whole appara-tus, -thereby bringing down the rate of abrasion wear of the layer 31 caused by the charge and the gas flow~ In the case o~
formation of cracks in the layers 2 and 3 said metal enclosure 8 prevents their failure.
It is to be understood that the invention has been des cribed her~in in terms o~ particular embodiments and that various modi~ications may be ~ade in the invention withou-t de-parting ~'rom the spirit o~ the ~ollowin~ claims.
Claims (9)
1. An apparatus for cooling a metallurgical furnace wall, comprising:
a two-layer plate having a low heat conductivity layer and a high heat conductivity layer, at least two cooling metal pipes built in said plate so that a space is provided between said pipes, and the interface of the plate layers intersects the cavity of said pipes in the longitudinal direction and substan-tially in parallel to the plane of the plate, and is displaced towards the low heat conductivity layer with respect to the longitudinal centreline plate of the cooling pipes.
a two-layer plate having a low heat conductivity layer and a high heat conductivity layer, at least two cooling metal pipes built in said plate so that a space is provided between said pipes, and the interface of the plate layers intersects the cavity of said pipes in the longitudinal direction and substan-tially in parallel to the plane of the plate, and is displaced towards the low heat conductivity layer with respect to the longitudinal centreline plate of the cooling pipes.
2. An apparatus as claimed in claim 1, wherein the inter-face of the plate layers is displaced to an amount of from 0.180 to 0.318 the external diameter of the cooling pipe.
3. An apparatus as claimed in claim 1, wherein the low heat conductivity layer is made from a heat-resistant concrete, and the high heat conductivity layer is made from a metal mate-rial selected from steel, aluminium-containing cast-iron, and spheroidal graphite cast iron.
4. An apparatus as claimed in claim 1, wherein the low heat conductivity layer is joined with the high heat conductivity layer with the aid of reinforcement inserts.
5. An apparatus as claimed in claim 4, wherein the rein-forcement inserts are made in the form of truncated conical projections on the high heat conductivity layer of the plate, inserted into through conical holes provided in the low heat conductivity layer, the smaller-diameter ends of the truncated conical projections being directed towards the high heat conductivity layer.
6. An apparatus as claimed in claim 5, wherein the larger diameter of each truncated conical pro-jection of the high heat conductivity layer equals from 0.5 to 3.0 the thickness of the low heat con-ductivity layer, and the tapering of the projection is in the range from 1:3 to 1:10.
7. An apparatus as claimed in claim 5, wherein said conical projections are disposed in a chequer-board pattern within spaces between cooling pipes and equidistant from the axes of the adjacent cooling pipes.
8. An apparatus as claimed in claim 1, wherein the two-layer plate incorporating the cooling pipes is placed within a metal enclosure which is closed on the side of the low heat conductivity layer and open on the side of the high heat conductivity layer.
9. An apparatus as claimed in claim 8, wherein the depth of the metal enclosure is at least equal to the external diameter of the cooling pipes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SU1982/000005 WO1983002781A1 (en) | 1982-02-03 | 1982-02-03 | Device for cooling the wall of a metallurgical furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1200380A true CA1200380A (en) | 1986-02-11 |
Family
ID=21616764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000406590A Expired CA1200380A (en) | 1982-02-03 | 1982-07-05 | Apparatus for cooling metallurgical furnace wall |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS59500110A (en) |
| CA (1) | CA1200380A (en) |
| DE (1) | DE3249375C2 (en) |
| FR (1) | FR2530325A1 (en) |
| GB (1) | GB2123536B (en) |
| IN (1) | IN156239B (en) |
| WO (1) | WO1983002781A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29616509U1 (en) * | 1996-09-23 | 1996-11-14 | REA Rhein-Emscher Armaturen GmbH & Co KG, 47199 Duisburg | Wall cooling element for shaft furnaces |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1919087A (en) * | 1929-08-08 | 1933-07-18 | American Eng Co Ltd | Furnace side wall |
| BE646081A (en) * | 1963-04-03 | 1964-08-17 | ||
| FR1415060A (en) * | 1964-10-29 | 1965-10-22 | Karrena Feuerungsbau Gmbh | Process in particular for the coating of firebox tubes or other applications |
| SU506466A1 (en) * | 1974-04-01 | 1976-03-15 | Refrigeration plate metallurgical unit | |
| SU545676A1 (en) * | 1975-12-26 | 1977-02-05 | Центральный Научно-Исследовательский Институт Технологии Машиностроения | Blast Furnace Refrigerator |
| GB1571789A (en) * | 1976-12-30 | 1980-07-16 | Brown & Sons Ltd James | Furnace cooling element |
| US4154175A (en) * | 1978-01-16 | 1979-05-15 | Antonov Vladimir M | Cooler for a shaft furnace |
| FR2420108A1 (en) * | 1978-03-17 | 1979-10-12 | Inst Ochistke Tekhn | Shaft furnace cooling plate - includes coolant-contg. pipes with coolant-free ends of pipes mounted in cooling chamber exterior of furnace wall |
-
1982
- 1982-02-03 DE DE19823249375 patent/DE3249375C2/en not_active Expired
- 1982-02-03 JP JP82501064A patent/JPS59500110A/en active Granted
- 1982-02-03 GB GB08324032A patent/GB2123536B/en not_active Expired
- 1982-02-03 WO PCT/SU1982/000005 patent/WO1983002781A1/en active Application Filing
- 1982-07-05 CA CA000406590A patent/CA1200380A/en not_active Expired
- 1982-07-19 FR FR8212562A patent/FR2530325A1/en active Granted
- 1982-08-03 IN IN914/CAL/82A patent/IN156239B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3249375T1 (en) | 1984-01-12 |
| GB2123536B (en) | 1985-04-03 |
| FR2530325A1 (en) | 1984-01-20 |
| FR2530325B1 (en) | 1985-02-01 |
| GB8324032D0 (en) | 1983-10-12 |
| JPS59500110A (en) | 1984-01-19 |
| JPS6152393B2 (en) | 1986-11-13 |
| GB2123536A (en) | 1984-02-01 |
| DE3249375C2 (en) | 1986-02-06 |
| WO1983002781A1 (en) | 1983-08-18 |
| IN156239B (en) | 1985-06-08 |
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