WO2002088399A1 - Cooling element for cooling the walls of shaft furnaces - Google Patents
Cooling element for cooling the walls of shaft furnaces Download PDFInfo
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- WO2002088399A1 WO2002088399A1 PCT/EP2002/004750 EP0204750W WO02088399A1 WO 2002088399 A1 WO2002088399 A1 WO 2002088399A1 EP 0204750 W EP0204750 W EP 0204750W WO 02088399 A1 WO02088399 A1 WO 02088399A1
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- Prior art keywords
- cooling
- cooling element
- coolant
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Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
- F27B1/24—Cooling arrangements
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- 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
- F27D2009/0051—Cooling of furnaces comprising use of studs to transfer heat or retain the liner
Definitions
- the invention relates to a cooling element for cooling walls of shaft furnaces with a hot side facing the furnace interior and a cold side facing the shaft furnace wall and with at least one coolant duct and with pipe sections for the coolant inlet or outlet for each coolant duct.
- Such cooling elements are attached to the furnace walls provided with a refractory lining for cooling.
- the hot side i.e. the side of the cooling element facing the inside of the furnace
- the cold side i.e. the side of the cooling element pointing towards the shaft furnace wall or the side pointing away from the furnace interior.
- a copper cooling element or stave is known from EP 0 930 371 A1.
- coolant channels are provided, which are partly delimited by the cooling plate itself and partly by sheets. The coolant channels are cut into the back of the cooling plate and / or sheets. The sheets run parallel to the back of the cooling plate and are attached to the back by welding or screwing.
- a cooling plate for cooling shaft furnaces is also known from DE 199 15 942.4.
- This cooling plate or this stavelet only comprises one coolant channel, which on its hot side is shaped by a trough-shaped rolled profile Shield and on its cold side is also formed by a trough-shaped rolled profile in the sense of a supplementary profile, which are welded together.
- the invention has for its object to simplify a cooling element in terms of production technology while saving manufacturing costs.
- the cooling capacity should be optimized according to the operating requirements.
- the cooling element according to the invention is characterized in that it consists at least partially, preferably completely, of aluminum or an aluminum alloy.
- the complete cooling element, including the sections for the coolant inlet and outlet or the cooling pipes, can be made of aluminum or an aluminum alloy.
- Aluminum shows the advantages of a lower specific weight compared to copper or steel. Mechanical processing of aluminum is relatively easier and can therefore be carried out more quickly. Aluminum has a higher heat storage capacity than copper, but still offers a sufficient cooling effect for cooling the shaft furnace walls. For production, it is advisable to choose aluminum alloys that have excellent welding properties.
- a cooling element made of aluminum can have different designs.
- the cooling element comprises a cooling plate on the hot side and at least one sheet metal or a sheet metal section on the cold side (Ks) for delimiting the coolant channels from the cold side (Ks).
- the respective sheets or the sheet metal section, which are each assigned to a coolant channel, are bulged out towards the cold side (Ks).
- the thickness of the sheet or the sheet metal section can be less than, equal to or even greater than the thickness of the cooling plate - in each case depending on the specific requirements and the area of use of the cooling element. It has proven to be an advantage that the cooling plate itself can be made relatively thin, which saves material costs and is also accompanied by an advantageous weight reduction.
- the respective cooling channel is formed by the plane-parallel back of the cooling plate and a sheet metal that bulges out toward the cold side.
- This bulge is to be understood in such a way that the length of the respective coolant channels results in either a semi-elliptical or a semicircular cross section or a cross section with bulge steps in between for the respective coolant channel.
- the respective sheets or sheet metal sections are bulged out along the respective coolant channels in such a way that the cross-sectional area of the respective cooling channel with respect to the longitudinal extent of the cooling channel cross section is larger in the end areas than in the central area, in particular a cross section results, which has approximately the cross-sectional area of half a dog's bone.
- This shape of the sheets or sheet sections has cooling advantages.
- the respective sheets or sheet metal sections along the respective coolant channels can also be bulged out in such a way that a rectangular cross section results for the respective coolant channel.
- a separate curved sheet is assigned to each coolant channel of the cooling element. These are preferably welded along their two longitudinal edges on the back of the cooling plate.
- the curved sheet metal sections are part of a sheet metal plate attached to the rear of the cooling plate, which at least a part, preferably the entire back, of the cooling plate covers.
- This sheet metal plate has plane-parallel intermediate sections between the adjacent curved sheet metal sections to the rear side of the cooling plate. It is preferably produced by profile rolling.
- the cooling element is aligned on the furnace wall in such a way that the coolant channels, which are preferably supplied with cooling water, extend in the direction of the longitudinal extent of the furnace.
- Such a sheet metal plate is preferably attached by means of spot welding along the intermediate sections on the back of the cooling plate.
- the cooling element can also be made of an aluminum compound, i.e. made of composite materials with aluminum.
- the proposed cooling element is characterized in that the cooling plate pointing towards the inside of the furnace does not have to be mechanically processed in addition to the welding of the metal sheets to create the coolant channels. This reduces the manufacturing costs by minimizing the manufacturing outlay.
- cooling element made of aluminum is also conceivable, in the cooling plate of which a cooling channel or a part of the cooling channel is milled and the metal sheets that cross the cooling channel then delimit it on the other side.
- the cooling element consists of an extruded profile section made of aluminum or aluminum alloy.
- the complete cooling element including the cooling tubes or the tube sections for the coolant inlet and outlet, can be produced in a casting process, which, like extrusion, has manufacturing advantages because the step of connecting the cooling plate and the metal sheets can be omitted.
- Figure 1 is an oblique view of an inventive cooling element of a first type according to an embodiment.
- Fig. 2 is an oblique view of an inventive cooling element of the first type according to another embodiment.
- 3a, b show the schematic representation of coolant channel cross-sectional shapes.
- Fig. 4 shows schematically the cross section through a cooling element made of an extruded aluminum profile section with a coolant channel.
- the cooling element 1 shows a cooling element 1 or a stave for cooling walls of shaft furnaces with a plurality of coolant channels 2a, b, c, d.
- the cooling element 1 is composed of a cooling plate 3 and a plurality of sheets 4a, b, c, d which are attached to the rear side 5 of the cooling plate 1 and which Limit the middle channels 2a-d from the cold side (Ks).
- both the cooling plate and the sheets as well as the cooling pipes for supplying and discharging the cooling water are made of aluminum; however, it is also possible, for example, that only the cooling plate and / or the sheets are made of aluminum, while the cooling tubes are made of steel or copper.
- the front 6 of the cooling plate 3 is directed toward the hot side (Hs) in the direction of the furnace interior, which is provided with grooves 31 (only partially shown here) for receiving refractory material.
- a lower pipe section 7 for the entry of coolant, such as water, and an upper pipe section 8 for the coolant outlet are assigned to each coolant channel 2 a. These pipe sections protrude through bores 9, 10 into the individual cavities formed by the metal sheets 4a-d
- Coolant channels 2a-d are welded to the holes.
- the pipe sections 7, 8 protrude through corresponding openings in the furnace wall (not shown) and are either connected to the pipe sections of adjacent coolant channels or to a cooling water recooling system.
- the cooling plate 3 consists of a forged or rolled ingot made of aluminum; it can also be cast. Caps 11 for sealing the channels are fitted above and below the coolant channels 2a-d formed by the metal sheets 4a-d.
- the sheets 4a-d are curved so that - as shown here - there is a semi-elliptical cross-section 16a-d of the individual coolant channel.
- the curvature can also be so strong that a semicircular cross section or
- a sheet metal plate 117 is attached to the rear side 105 of the cooling plate 103, which completely covers the rear side 105 in order to form the cooling element 101.
- This sheet metal plate 117 has sheet metal sections 118a-d that bulge outwards or toward the cold side (Ks) or toward the furnace wall, with intermediate sections 119a-c.
- the sheet metal sections 118a-d then form the respective coolant channels 102a-d.
- Spot welding (120) along the intermediate sections 119a-c achieves fastening of the sheet metal plate 117 to the rear side 105 of the cooling plate 103.
- the pipe sections 107, 108 for supplying and removing coolant are designed corresponding to the cooling element according to FIG. 1.
- Such cooling elements are usually combined into systems and mounted along partial areas on the furnace wall of shaft furnaces, in particular blast furnaces.
- the assembly takes place, for example, by means of screws through the furnace wall or by means of a web holder 21 (cf. FIG. 1).
- the cooling element 201 has a coolant channel 202; it is also possible to provide a plurality of coolant channels arranged next to one another and separated by material webs in a profile section.
- the hot side region 223 or the profile section part facing the hot side Hs merges into edges 224, 225 running longitudinally to the cooling element 201.
- the coolant channel 202 can be arranged relatively close to the hot side Hs, which has a high cooling effect.
- the material thickenings described counteract thermal deformation. Such material thickening can also be provided as a material web between adjacent coolant channels.
- the cooling element 201 is provided with pipe sections 228 through which coolant enters and exits the channel 202. This penetrates the cold side Ks of the profile section and is fastened by welds 229, 230.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
Kühlelement zur Kühlung von Wänden von SchachtöfenCooling element for cooling walls of shaft furnaces
Die Erfindung betrifft ein Kühlelement zur Kühlung von Wänden von Schachtöfen mit einer zum Ofeninneren weisenden Heißseite und einer zur Schachtofenwand weisenden Kaltseite und mit mindestens einem Kühlmittelkanal sowie mit Rohrabschnitten zum Kühlmitteleintritt bzw. Kühlmittelaustritt für jeden Kühlmittelkanal.The invention relates to a cooling element for cooling walls of shaft furnaces with a hot side facing the furnace interior and a cold side facing the shaft furnace wall and with at least one coolant duct and with pipe sections for the coolant inlet or outlet for each coolant duct.
Solche Kühlelemente werden zur Kühlung an mit einer feuerfesten Auskleidung versehene Ofenwände angebracht. Hierbei wird zwischen der Heißseite, d.h. der zum Ofeninneren weisenden Seite des Kühlelementes, und der Kaltseite, d.h. der zur Schachtofenwand hinweisenden bzw. der vom Ofeninneren weg- weisenden Seite des Kühlelementes, unterschieden.Such cooling elements are attached to the furnace walls provided with a refractory lining for cooling. Here, between the hot side, i.e. the side of the cooling element facing the inside of the furnace, and the cold side, i.e. the side of the cooling element pointing towards the shaft furnace wall or the side pointing away from the furnace interior.
Ein Kühlelement bzw. Stave aus Kupfer ist aus der EP 0 930 371 A1 bekannt. Diese offenbart eine Kühlplatte für mit einer feuerfesten Auskleidung versehene Schachtöfen, wobei die Kühlplatte aus einem geschmiedeten oder gewalzten Rohblock aus Kupfer oder einer Kupferlegierung gefertigt ist und auf einer Seite, nämlich der Vorderseite, angeordnete Nute zur Aufnahme von feuerfestem Material aufweist. Auf der Rückseite der Kühlplatte sind Kühlmittelkanäle vorgesehen, die zu einem Teil durch die Kühlplatte selbst und zu einem anderen Teil durch Bleche begrenzt sind. Die Kühlmittelkanäle sind durch Fräsen in die Rückseite der Kühlplatte und/oder Bleche eingebracht. Die Bleche verlaufen hierbei planparallel zur Rückseite der Kühlplatte und sind auf der Rückseite durch Schweißen oder Verschrauben angebracht.A copper cooling element or stave is known from EP 0 930 371 A1. This discloses a cooling plate for shaft furnaces provided with a refractory lining, the cooling plate being made from a forged or rolled ingot made of copper or a copper alloy and having grooves arranged on one side, namely the front, for receiving refractory material. On the back of the cooling plate, coolant channels are provided, which are partly delimited by the cooling plate itself and partly by sheets. The coolant channels are cut into the back of the cooling plate and / or sheets. The sheets run parallel to the back of the cooling plate and are attached to the back by welding or screwing.
Aus der DE 199 15 942.4 ist ebenfalls eine Kühlplatte für Kühlschachtöfen be- kannt. Diese Kühlplatte bzw. dieses Stavelet umfasst nur einen Kühlmittelkanal, der auf seiner Heißseite durch ein muldenförmiges Walzprofil im Sinne eines Schildes und auf seiner Kaltseite ebenfalls durch ein muldenförmiges Walzprofil im Sinne eines Ergänzungsprofils gebildet ist, die miteinander verschweißt sind.A cooling plate for cooling shaft furnaces is also known from DE 199 15 942.4. This cooling plate or this stavelet only comprises one coolant channel, which on its hot side is shaped by a trough-shaped rolled profile Shield and on its cold side is also formed by a trough-shaped rolled profile in the sense of a supplementary profile, which are welded together.
Der Erfindung liegt die Aufgabe zugrunde, ein Kühlelement fertigungstechnisch zu vereinfachen bei gleichzeitiger Einsparung von Herstellungskosten. Zudem soll die Kühlleistung den Betriebserfordernissen entsprechend optimiert werden.The invention has for its object to simplify a cooling element in terms of production technology while saving manufacturing costs. In addition, the cooling capacity should be optimized according to the operating requirements.
Diese Aufgabe wird durch das Kühlelement mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterentwicklungen sind in den Unteransprüchen beschrieben.This object is achieved by the cooling element with the features of claim 1. Advantageous further developments are described in the subclaims.
Das erfindungsgemäße Kühlelement zeichnet sich dadurch aus, dass es wenigstens teilweise, vorzugsweise vollständig, aus Aluminium oder einer Aluminiumlegierung besteht. Hierbei kann das komplette Kühlelement einschließlich der Abschnitte für den Kühlmittelein- und -austritt bzw. die Kühlrohre aus Alu- minium bzw. einer Aluminiumlegierung bestehen.The cooling element according to the invention is characterized in that it consists at least partially, preferably completely, of aluminum or an aluminum alloy. The complete cooling element, including the sections for the coolant inlet and outlet or the cooling pipes, can be made of aluminum or an aluminum alloy.
Der Einsatz von Aluminium zeigt die Vorteile eines geringeren spezifischen Gewichtes im Verhältnis zu Kupfer oder Stahl auf. Die mechanische Bearbeitung von Aluminium ist im Verhältnis einfacher und kann dadurch schneller durchgeführt werden. Aluminium weist im Verhältnis zu Kupfer eine höhere Wärmespeicherkapazität auf, bietet aber dennoch eine für die Kühlung der Schachtofenwände ausreichende Kühlwirkung. Zur Fertigung empfiehlt es sich, insbesondere Aluminiumlegierungen zu wählen, die im Verhältnis ausgezeichnete Schweißeigenschaften aufweisen.The use of aluminum shows the advantages of a lower specific weight compared to copper or steel. Mechanical processing of aluminum is relatively easier and can therefore be carried out more quickly. Aluminum has a higher heat storage capacity than copper, but still offers a sufficient cooling effect for cooling the shaft furnace walls. For production, it is advisable to choose aluminum alloys that have excellent welding properties.
Ein Kühlelement aus Aluminium kann verschiedene Bauformen aufweisen. Nach einer ersten bevorzugten Bauform umfasst das Kühlelement zur Heißseite eine Kühlplatte und zur Kaltseite (Ks) mindestens ein Blech oder einen Blechabschnitt zur Begrenzung der Kühlmittelkanäle von der Kaltseite (Ks). Hierbei sind die jeweiligen Bleche oder der Blechabschnitt, die jeweils einem Kühlmittelkanal zugeordnet sind, zur Kaltseite (Ks) hin ausgewölbt. Hierbei kann die Dicke des Blechs oder des Blechabschnitts kleiner, gleich oder auch größer als die Dicke der Kühlplatte sein - jeweils abhängig von den spezifischen Erfordernissen und dem Einsatzbereich des Kühlelementes. Es erweist sich als Vorteil, dass die Kühlplatte selbst relativ dünn ausgebildet werden kann, was Materialkosten einspart und zudem mit einer vorteilhaften Gewichts- reduzierung einhergeht.A cooling element made of aluminum can have different designs. According to a first preferred design, the cooling element comprises a cooling plate on the hot side and at least one sheet metal or a sheet metal section on the cold side (Ks) for delimiting the coolant channels from the cold side (Ks). The respective sheets or the sheet metal section, which are each assigned to a coolant channel, are bulged out towards the cold side (Ks). in this connection The thickness of the sheet or the sheet metal section can be less than, equal to or even greater than the thickness of the cooling plate - in each case depending on the specific requirements and the area of use of the cooling element. It has proven to be an advantage that the cooling plate itself can be made relatively thin, which saves material costs and is also accompanied by an advantageous weight reduction.
Insbesondere wird der jeweilige Kühlkanal durch die planparallele Rückseite der Kühlplatte sowie ein zur Kaltseite hin ausgewölbtes Blech gebildet. Diese Auswölbung ist so zu verstehen, dass sich über die Länge der jeweiligen Kühlmit- telkanäle entweder ein halbelliptischer oder ein halbkreisförmiger Querschnitt oder ein Querschnitt mit dazwischen liegenden Wölbungsstufen für den jeweiligen Kühlmittelkanal ergibt.In particular, the respective cooling channel is formed by the plane-parallel back of the cooling plate and a sheet metal that bulges out toward the cold side. This bulge is to be understood in such a way that the length of the respective coolant channels results in either a semi-elliptical or a semicircular cross section or a cross section with bulge steps in between for the respective coolant channel.
Des weiteren wird vorgeschlagen, dass die jeweiligen Bleche oder Blechab- schnitte entlang der jeweiligen Kühlmittelkanäle so ausgewölbt sind, dass die Querschnittsfläche des jeweiligen Kühlkanals in Bezug auf die Längserstrek- kung des Kühlkanalquerschnitts in den Endbereichen größer ist als im Mittenbereich, wobei sich insbesondere ein Querschnitt ergibt, der in etwa die Querschnittsfläche eines halben Hundeknochens aufweist. Diese Form der Bleche oder Blechabschnitte hat kühltechnische Vorteile. Daneben können die jeweiligen Bleche oder Blechabschnitte entlang der jeweiligen Kühlmittelkanäle auch so ausgewölbt sein, dass sich ein rechteckiger Querschnitt für den jeweiligen Kühlmittelkanal ergibt.Furthermore, it is proposed that the respective sheets or sheet metal sections are bulged out along the respective coolant channels in such a way that the cross-sectional area of the respective cooling channel with respect to the longitudinal extent of the cooling channel cross section is larger in the end areas than in the central area, in particular a cross section results, which has approximately the cross-sectional area of half a dog's bone. This shape of the sheets or sheet sections has cooling advantages. In addition, the respective sheets or sheet metal sections along the respective coolant channels can also be bulged out in such a way that a rectangular cross section results for the respective coolant channel.
Nach einer weiteren Ausführungsform ist jedem Kühlmittelkanal des Kühlelementes jeweils ein separates gewölbtes Blech zugeordnet. Diese sind entlang ihrer beiden Längskanten auf der Rückseite der Kühlplatte vorzugsweise verschweißt.According to a further embodiment, a separate curved sheet is assigned to each coolant channel of the cooling element. These are preferably welded along their two longitudinal edges on the back of the cooling plate.
Nach einer anderen Ausführungsform sind die gewölbten Blechabschnitte Teil einer an der Rückseite der Kühlplatte befestigten Blechplatte, die zumindest einen Teil, vorzugsweise die gesamte Rückseite, der Kühlplatte überdeckt. Diese Blechplatte weist zwischen den benachbarten gewölbten Blechabschnitten zur Kühlplattenrückseite planparallele Zwischenabschnitte auf. Sie wird vorzugsweise durch Profilwalzen hergestellt. Das Kühlelement wird an der Ofenwand so ausgerichtete, dass die Kühlmittelkanäle, die vorzugsweise mit Kühl- wasser beaufschlagt werden, sich in Richtung Längserstreckung des Ofens erstrecken.According to another embodiment, the curved sheet metal sections are part of a sheet metal plate attached to the rear of the cooling plate, which at least a part, preferably the entire back, of the cooling plate covers. This sheet metal plate has plane-parallel intermediate sections between the adjacent curved sheet metal sections to the rear side of the cooling plate. It is preferably produced by profile rolling. The cooling element is aligned on the furnace wall in such a way that the coolant channels, which are preferably supplied with cooling water, extend in the direction of the longitudinal extent of the furnace.
Eine solche Blechplatte wird vorzugsweise mittels Punktschweißen entlang der Zwischenabschnitte an der Rückseite der Kühlplatte befestigt.Such a sheet metal plate is preferably attached by means of spot welding along the intermediate sections on the back of the cooling plate.
Das Kühlelement kann auch aus einer Aluminiumverbindung, d.h. aus Verbundmaterialien mit Aluminium, bestehen.The cooling element can also be made of an aluminum compound, i.e. made of composite materials with aluminum.
Grundsätzlich zeichnet sich das vorgeschlagene Kühlelement dadurch aus, dass die zum Ofeninneren hinweisende Kühlplatte neben der Anschweißung der Bleche nicht weiter mechanisch zur Schaffung der Kühlmittelkanäle bearbeitet werden muss. Dies reduziert die Kosten bei der Herstellung durch Minimierung des fertigungstechnischen Aufwandes.Basically, the proposed cooling element is characterized in that the cooling plate pointing towards the inside of the furnace does not have to be mechanically processed in addition to the welding of the metal sheets to create the coolant channels. This reduces the manufacturing costs by minimizing the manufacturing outlay.
Zudem erweist sich als Vorteil, dass zum Zusammenbau eines Kühlelementes nur die Grundbestandteile Kühlplatte sowie eine Blechplatte bzw. mehrere Bleche benötigt werden, die mittels Schweißen unproblematisch in Werkstätten miteinander verbunden werden können, ohne auf aufwendige Fräsmaschinen zurückgreifen zu müssen.In addition, it proves to be an advantage that only the basic components of the cooling plate and a sheet metal plate or several sheets are required to assemble a cooling element, which can be easily connected to one another in workshops by welding, without having to resort to complex milling machines.
Auch ist eine Bauart eines Kühlelementes aus Aluminium denkbar, in dessen Kühlplatte ein Kühlkanal oder ein Teil des Kühlkanals eingefräst werden und die den Kühlkanal übergreifenden Bleche diesen dann auf der anderen Seite begrenzen. Nach einer zweiten bevorzugten Bauform besteht das Kühlelement aus einem stranggepressten Profilabschnitt aus Aluminium oder Aluminiumlegierung.A design of a cooling element made of aluminum is also conceivable, in the cooling plate of which a cooling channel or a part of the cooling channel is milled and the metal sheets that cross the cooling channel then delimit it on the other side. According to a second preferred design, the cooling element consists of an extruded profile section made of aluminum or aluminum alloy.
Neben den erläuterten Bauformen kann das komplette Kühlelement einschließlich der Kühlrohre bzw. der Rohrabschnitte zum Kühlmittelein- und austritt in einem Gussverfahren hergestellt werden, was ebenso wie das Strangpressen fertigungstechnische Vorteile aufweist, weil der Schritt des Verbindens zwischen Kühlplatte und Blechen entfallen kann.In addition to the designs described, the complete cooling element, including the cooling tubes or the tube sections for the coolant inlet and outlet, can be produced in a casting process, which, like extrusion, has manufacturing advantages because the step of connecting the cooling plate and the metal sheets can be omitted.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den Unteran- Sprüchen und aus der nachfolgenden Beschreibung, in der die in den Figuren dargestellten Ausführungsformen der Erfindung näher erläutert werden. Dabei sind neben den oben aufgeführten Kombinationen von Merkmalen auch Merkmale alleine oder in anderen Kombinationen erfindungswesentlich. Es zeigen:Further details and advantages of the invention emerge from the subclaims and from the following description, in which the embodiments of the invention illustrated in the figures are explained in more detail. In addition to the combinations of features listed above, features alone or in other combinations are also essential to the invention. Show it:
Fig. 1 eine Schrägansicht auf ein erfindungsgemäßes Kühlelement einer ersten Bauart nach einer Ausführungsform;Figure 1 is an oblique view of an inventive cooling element of a first type according to an embodiment.
Fig. 2 eine Schrägansicht auf ein erfindungsgemäßes Kühlelement der ersten Bauart nach einer anderen Ausführungsform.Fig. 2 is an oblique view of an inventive cooling element of the first type according to another embodiment.
Fig.3a, b die schematische Darstellung von Kühlmittelkanalquerschnittsfor- men.3a, b show the schematic representation of coolant channel cross-sectional shapes.
Fig. 4 schematisch den Querschnitt durch ein Kühlelement aus einem stranggepressten Aluminium-Profilabschnitt mit einem Kühlmittelkanal.Fig. 4 shows schematically the cross section through a cooling element made of an extruded aluminum profile section with a coolant channel.
Fig. 1 zeigt ein Kühlelement 1 bzw. einen Stave zur Kühlung von Wänden von Schachtöfen mit mehreren Kühlmittelkanälen 2a, b, c, d. Das Kühlelement 1 setzt sich aus einer Kühlplatte 3 sowie mehreren Blechen 4a, b, c, d zusammen, die an der Rückseite 5 der Kühlplatte 1 angebracht sind und die die Kühl- mittelkanäle 2a-d von der Kaltseite (Ks) her begrenzen. Insbesondere sind sowohl die Kühlplatte als auch die Bleche als auch die Kühlrohre zur Zu- und Ableitung des Kühlwassers aus Aluminium gefertigt; es ist aber auch beispielsweise möglich, dass nur die Kühlplatte und/oder die Bleche aus Aluminium sind, während die Kühlrohre aus Stahl oder Kupfer sind. Zur Heißseite (Hs) Richtung Ofeninneres ist die Vorderseite 6 der Kühlplatte 3 gerichtet, die mit Nuten 31 (hier nur teilweise dargestellt) zur Aufnahme von Feuerfest-Material versehen ist. Jedem Kühlmittelkanal 2a- d ist jeweils ein unterer Rohrabschnitt 7 zum Eintritt von Kühlmittel, wie Wasser, sowie ein oberer Rohrabschnitt 8 zum Kühlmittelaustritt zugeordnet. Diese Rohrabschnitte ragen durch Bohrungen 9, 10 in die einzelnen durch die Bleche 4a- d gebildeten Hohlräume für die1 shows a cooling element 1 or a stave for cooling walls of shaft furnaces with a plurality of coolant channels 2a, b, c, d. The cooling element 1 is composed of a cooling plate 3 and a plurality of sheets 4a, b, c, d which are attached to the rear side 5 of the cooling plate 1 and which Limit the middle channels 2a-d from the cold side (Ks). In particular, both the cooling plate and the sheets as well as the cooling pipes for supplying and discharging the cooling water are made of aluminum; however, it is also possible, for example, that only the cooling plate and / or the sheets are made of aluminum, while the cooling tubes are made of steel or copper. The front 6 of the cooling plate 3 is directed toward the hot side (Hs) in the direction of the furnace interior, which is provided with grooves 31 (only partially shown here) for receiving refractory material. A lower pipe section 7 for the entry of coolant, such as water, and an upper pipe section 8 for the coolant outlet are assigned to each coolant channel 2 a. These pipe sections protrude through bores 9, 10 into the individual cavities formed by the metal sheets 4a-d
Kühmittelkanäle 2a-d und sind an den Bohrungen verschweißt. Auf ihrer anderen Seite ragen die Rohrabschnitte 7, 8 durch entsprechende Öffnungen in der Ofenwand (nicht gezeigt) und sind entweder mit den Rohrabschnitten benachbarter Kühlmittelkanäle oder mit einem Kühlwasser-Rückkühlsystem verbun- den.Coolant channels 2a-d and are welded to the holes. On their other side, the pipe sections 7, 8 protrude through corresponding openings in the furnace wall (not shown) and are either connected to the pipe sections of adjacent coolant channels or to a cooling water recooling system.
Die Kühlplatte 3 besteht aus einem geschmiedeten oder gewalzten Rohblock aus Aluminium; sie kann auch gegossen sein. Oberhalb und unterhalb der durch die Bleche 4a-d gebildeten Kühlmittelkanäle 2a-d sind Kappen 11 zur Abdichtung der Kanäle angebracht.The cooling plate 3 consists of a forged or rolled ingot made of aluminum; it can also be cast. Caps 11 for sealing the channels are fitted above and below the coolant channels 2a-d formed by the metal sheets 4a-d.
Bei der in Fig. 1 gezeigten Ausführungsform ist jeweils einem Kühlmittelkanal 2a- d ein separates Blech 4a- d zugeordnet, das entlang seiner beiden Längskanten 12, 13, 14, 15 an der Rückseite 5 der Kühlplatte 3 verschweißt ist. In Fig. 1 sind nur die Schweißnähte der beiden rechts gezeigten Bleche 4c,d exemplarisch eingezeichnet.In the embodiment shown in FIG. 1, a separate sheet metal 4a-d is assigned to a coolant channel 2a-d, which is welded along its two longitudinal edges 12, 13, 14, 15 to the rear side 5 of the cooling plate 3. In Fig. 1, only the welds of the two sheets 4c, d shown on the right are shown as examples.
Die Bleche 4a- d sind so gewölbt, dass sich - wie hier gezeigt - ein halbelliptischer Querschnitt 16a-d des einzelnen Kühlmittelkanals ergibt. Die Wölbung kann auch so stark sein, dass sich ein halbkreisförmiger Querschnitt oderThe sheets 4a-d are curved so that - as shown here - there is a semi-elliptical cross-section 16a-d of the individual coolant channel. The curvature can also be so strong that a semicircular cross section or
Querschnitts-Zwischenstufen ergeben. Weitere erfindungsgemäße Wölbungs- formen sind in den Fig. 3a, b schematisch anhand jeweils eines Bleches 4e, 4f gezeigt, wobei sich für die Kühlmittelkanäle einerseits ein in etwa halbhunde- knochenförmiger Querschnitt (Fig. 3a, 16e) oder andererseits ein rechteckiger Querschnitt (Fig. 3b, 16f) ergibt.Cross-sectional intermediate stages result. Further arching according to the invention 3a, b are shown schematically in each case with the aid of a sheet 4e, 4f, the coolant channels having an approximately half-dog-shaped cross-section (FIGS. 3a, 16e) or a rectangular cross-section (FIGS. 3b, 16f) ) results.
Nach einer zweiten Ausführungsform (Fig. 2) wird eine Blechplatte 117 auf der Rückseite 105 der Kühlplatte 103 angebracht, die die Rückseite 105 vollständig überdeckt, um das Kühlelement 101 zu bilden. Diese Blechplatte 117 weist nach außen bzw. zur Kaltseite (Ks) bzw. zur Ofenwand hin ausgewölbte Blechabschnitte 118a-d mit Zwischenabschnitten 119a-c auf. Die Blechab- schnitte 118a-d bilden dann die jeweiligen Kühlmittelkanäle 102a-d. Mittels Punktschweißen (120) entlang der Zwischenabschnitte 119a-c wird eine Befestigung der Blechplatte 117 mit der Rückseite 105 der Kühiplatte 103 erreicht. Die Rohrabschnitte 107, 108 zur Kühlmittelzu- bzw. abführung sind entsprechend dem Kühlelement nach Fig. 1 ausgebildet.According to a second embodiment (FIG. 2), a sheet metal plate 117 is attached to the rear side 105 of the cooling plate 103, which completely covers the rear side 105 in order to form the cooling element 101. This sheet metal plate 117 has sheet metal sections 118a-d that bulge outwards or toward the cold side (Ks) or toward the furnace wall, with intermediate sections 119a-c. The sheet metal sections 118a-d then form the respective coolant channels 102a-d. Spot welding (120) along the intermediate sections 119a-c achieves fastening of the sheet metal plate 117 to the rear side 105 of the cooling plate 103. The pipe sections 107, 108 for supplying and removing coolant are designed corresponding to the cooling element according to FIG. 1.
Derartige Kühlelemente werden üblicherweise zu Systemen zusammengefasst und entlang von Teilbereichen an der Ofenwandung von Schachtöfen, insbesondere Hochöfen montiert. Die Montage erfolgt beispielsweise mittels Schrauben durch die Ofenwandung oder mittels einer Steg-Halterung 21 (vgl. Fig. 1).Such cooling elements are usually combined into systems and mounted along partial areas on the furnace wall of shaft furnaces, in particular blast furnaces. The assembly takes place, for example, by means of screws through the furnace wall or by means of a web holder 21 (cf. FIG. 1).
Fig. 4 zeigt ein Kühlelement 201 nach einer zweiten bevorzugten Bauart. Dieses wird durch Strangpressen von Aluminium oder einer Aluminiumlegierung hergestellt, wobei somit der Kaltseiten- und der Heißseitenbereich 222, 223 des Kühlelementes 201 einstückig hergestellt werden können, was fertigungstech- nisch weniger aufwendig ist. Nachträgliche Schweißungen wie bei der ersten Bauart zum Verbinden der Bleche mit der Kühlplatte entfallen. Im Beispiel weist das Kühlelement 201 einen Kühlmittelkanal 202 auf; es können ebenso mehrere nebeneinander angeordnete durch Materialstege getrennte Kühlmittelkanäle in einem Profilabschnitt vorgesehen sein. Der Heißseitenbereich 223 bzw. der zur Heißseite Hs weisende Profilabschnittsteil geht in längs zum Kühlelement 201 verlaufende Kanten 224, 225 über. Deren Dicke D bzw. der Abstand zwi- sehen der Oberfläche 226 und dem Kühlmittelkanal 202 ist im Vergleich zur Dicke d als Abstand zwischen der Oberfläche-Heißseite 227 und dem Kühlmittelkanal 202 größer. Durch geeignete Wahl der Dicke d kann der Kühlmittelkanal 202 relativ nah an der Heißseite Hs angeordnet sein, was eine hohe Kühlwirkung bewirkt. Die beschriebenen Materialverdickungen wirken einer thermi- sehen Verformung entgegen. Derartige Materialverdickungen können auch zwischen benachbarten Kühlmittelkanälen als Materialsteg vorgesehen sein. Das Kühlelement 201 ist mit Rohrabschnitten 228 versehen, durch die Kühlmittel in den Kanal 202 ein- und austritt. Dieses durchdringt die Kaltseite Ks des Profilabschnitts und wird durch Schweißnähte 229, 230 befestigt. 4 shows a cooling element 201 according to a second preferred design. This is produced by extrusion molding of aluminum or an aluminum alloy, whereby the cold side and the hot side area 222, 223 of the cooling element 201 can thus be manufactured in one piece, which is less complex in terms of production technology. Subsequent welds as in the first design for connecting the sheets to the cooling plate are not required. In the example, the cooling element 201 has a coolant channel 202; it is also possible to provide a plurality of coolant channels arranged next to one another and separated by material webs in a profile section. The hot side region 223 or the profile section part facing the hot side Hs merges into edges 224, 225 running longitudinally to the cooling element 201. Their thickness D or the distance between see the surface 226 and the coolant channel 202 is greater in comparison to the thickness d as the distance between the surface hot side 227 and the coolant channel 202. By a suitable choice of the thickness d, the coolant channel 202 can be arranged relatively close to the hot side Hs, which has a high cooling effect. The material thickenings described counteract thermal deformation. Such material thickening can also be provided as a material web between adjacent coolant channels. The cooling element 201 is provided with pipe sections 228 through which coolant enters and exits the channel 202. This penetrates the cold side Ks of the profile section and is fastened by welds 229, 230.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02724303A EP1383932A1 (en) | 2001-04-30 | 2002-04-30 | Cooling element for cooling the walls of shaft furnaces |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001121139 DE10121139A1 (en) | 2001-04-30 | 2001-04-30 | Cooling element for cooling walls of shaft furnaces |
| DE10121139.2 | 2001-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002088399A1 true WO2002088399A1 (en) | 2002-11-07 |
Family
ID=7683254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2002/004750 Ceased WO2002088399A1 (en) | 2001-04-30 | 2002-04-30 | Cooling element for cooling the walls of shaft furnaces |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1383932A1 (en) |
| DE (1) | DE10121139A1 (en) |
| WO (1) | WO2002088399A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1847622A1 (en) * | 2006-04-18 | 2007-10-24 | Paul Wurth S.A. | Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler |
| LU91811B1 (en) * | 2011-04-27 | 2012-10-29 | Wurth Paul Sa | Load distribution device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB496289A (en) * | 1937-04-23 | 1938-11-23 | Brassert & Co | Improvements in and relating to refractory linings for shaft furnaces |
| DE696325C (en) * | 1937-02-15 | 1940-09-18 | H A Brassert & Co | Cool box for shaft ovens, especially for blast furnaces |
| DE710923C (en) * | 1938-11-11 | 1941-09-23 | H A Brassert & Co | Shaft cooling on blast furnaces |
| US3849587A (en) * | 1973-10-15 | 1974-11-19 | Hatch Ass Ltd | Cooling devices for protecting refractory linings of furnaces |
| US4221922A (en) * | 1977-12-06 | 1980-09-09 | Sanyo Special Steel Co., Ltd. | Water cooled panel used in an electric furnace |
| US4342118A (en) * | 1979-01-04 | 1982-07-27 | Clesid S.A. | Panel for electric furnace |
| US4344477A (en) * | 1979-04-16 | 1982-08-17 | Nippon Light Metal Co., Ltd. | Method of die casting a metallic cast product having a metallic hollow member embedded therein |
| US4572269A (en) * | 1982-02-02 | 1986-02-25 | Vsesojuzny Nauchno-Issledova-Telsky I Proektny Institut Po Ochistke Tekhnolo | Method of manufacturing cooling plates for use in metallurgical furnaces and a cooling plate |
| US5426664A (en) * | 1994-02-08 | 1995-06-20 | Nu-Core, Inc. | Water cooled copper panel for a furnace and method of manufacturing same |
| US5741349A (en) * | 1995-10-19 | 1998-04-21 | Steel Technology Corporation | Refractory lining system for high wear area of high temperature reaction vessel |
| FR2775695A1 (en) * | 1998-03-05 | 1999-09-10 | Forcast Int | Cooling plate for a refractory lined shaft furnace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2544273A1 (en) * | 1975-10-03 | 1977-04-14 | Ewald W Dr Ing Rohde | Cooling system for shaft furnace casing and brickwork - having cooling channels assembled from mass produced parts |
| ITUD960018A1 (en) * | 1996-02-13 | 1997-08-14 | Danieli Off Mecc | COOLED Vault for electric arc furnaces and ladle ovens |
| DE19801425C2 (en) * | 1998-01-16 | 2000-08-10 | Sms Demag Ag | Cooling plate for shaft furnaces |
| DE10000987A1 (en) * | 1999-04-09 | 2000-10-12 | Sms Demag Ag | Cooling stave for a refractory lined shaft furnace, especially a blast furnace, comprises two trough-like rolled copper profiles welded together to form a non-circular cooling channel |
-
2001
- 2001-04-30 DE DE2001121139 patent/DE10121139A1/en not_active Ceased
-
2002
- 2002-04-30 WO PCT/EP2002/004750 patent/WO2002088399A1/en not_active Ceased
- 2002-04-30 EP EP02724303A patent/EP1383932A1/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE696325C (en) * | 1937-02-15 | 1940-09-18 | H A Brassert & Co | Cool box for shaft ovens, especially for blast furnaces |
| GB496289A (en) * | 1937-04-23 | 1938-11-23 | Brassert & Co | Improvements in and relating to refractory linings for shaft furnaces |
| DE710923C (en) * | 1938-11-11 | 1941-09-23 | H A Brassert & Co | Shaft cooling on blast furnaces |
| US3849587A (en) * | 1973-10-15 | 1974-11-19 | Hatch Ass Ltd | Cooling devices for protecting refractory linings of furnaces |
| US4221922A (en) * | 1977-12-06 | 1980-09-09 | Sanyo Special Steel Co., Ltd. | Water cooled panel used in an electric furnace |
| US4342118A (en) * | 1979-01-04 | 1982-07-27 | Clesid S.A. | Panel for electric furnace |
| US4344477A (en) * | 1979-04-16 | 1982-08-17 | Nippon Light Metal Co., Ltd. | Method of die casting a metallic cast product having a metallic hollow member embedded therein |
| US4572269A (en) * | 1982-02-02 | 1986-02-25 | Vsesojuzny Nauchno-Issledova-Telsky I Proektny Institut Po Ochistke Tekhnolo | Method of manufacturing cooling plates for use in metallurgical furnaces and a cooling plate |
| US5426664A (en) * | 1994-02-08 | 1995-06-20 | Nu-Core, Inc. | Water cooled copper panel for a furnace and method of manufacturing same |
| US5741349A (en) * | 1995-10-19 | 1998-04-21 | Steel Technology Corporation | Refractory lining system for high wear area of high temperature reaction vessel |
| FR2775695A1 (en) * | 1998-03-05 | 1999-09-10 | Forcast Int | Cooling plate for a refractory lined shaft furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1847622A1 (en) * | 2006-04-18 | 2007-10-24 | Paul Wurth S.A. | Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler |
| WO2007118752A1 (en) * | 2006-04-18 | 2007-10-25 | Paul Wurth S.A. | Method of manufacturing a stave cooler for a metallurgical furnace and a resulting stave cooler |
| LU91811B1 (en) * | 2011-04-27 | 2012-10-29 | Wurth Paul Sa | Load distribution device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1383932A1 (en) | 2004-01-28 |
| DE10121139A1 (en) | 2002-10-31 |
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