EP0918092B1 - Cooling devices for shaft furnace - Google Patents

Cooling devices for shaft furnace Download PDF

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Publication number
EP0918092B1
EP0918092B1 EP98121263A EP98121263A EP0918092B1 EP 0918092 B1 EP0918092 B1 EP 0918092B1 EP 98121263 A EP98121263 A EP 98121263A EP 98121263 A EP98121263 A EP 98121263A EP 0918092 B1 EP0918092 B1 EP 0918092B1
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EP
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Prior art keywords
cooling element
cooling
furnace wall
shaft furnace
fastening
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EP98121263A
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German (de)
French (fr)
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EP0918092A1 (en
Inventor
Peter Dr.-Ing. Heinrich
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SMS Siemag AG
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SMS Demag AG
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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
    • 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 peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements

Definitions

  • the invention relates to a cooling element for with a refractory lining shaft furnaces, in particular Blast furnaces consisting of copper or one low-alloy copper alloy with inside arranged coolant channels.
  • Cooling systems for the tank of shaft furnaces, in particular Blast furnaces are in "Stahl und Eisen", 106 (1986), No. 5, pages 205-210, described in detail.
  • cooling with so-called cooling boxes in recent years cooling with cooling plates, so-called staves, always made of cast iron and copper enforced more.
  • 25 280 is a cooling plate made of gray cast iron known in which the cooling channels through cooling pipes were formed, which were poured into the cast body were.
  • the disadvantage here is that to avoid the Carburizing requires a coating of the cooling pipes which is the heat flow from the hot side of the cooling plate or the staves through the stave body and the pipe wall to the cooling water. Staves like that therefore often reached high temperatures at which a Pearlite decay occurs (> 760 ° C); it formed Cracks in the cast body, and after a relatively short time Operating time is the casting material in front of the cooling pipes ablated.
  • the so-called copper staves which are known from DE 29 07 511 and are made from rolled copper material, represented a significant improvement, the cooling channels being introduced parallel to the hot side through deep-hole drilling. This results in an undisturbed heat flow that is not impeded by any pipe coating.
  • Such copper staves are significantly colder on their hot side than gray cast iron staves, so that - unlike gray cast iron staves - a stable crust of furniture material forms there, which acts as insulation. It happens that copper staves, despite the high thermal conductivity of this material, dissipate less heat from a blast furnace than gray cast iron staves.
  • Another advantage of the copper staves is that they can be made thinner (approx. 150 mm) than gray cast iron staves (approx. 250 mm). For a given blast furnace profile, the usable volume increases considerably when using copper staves.
  • EP 0 741 190 A1 discloses a cooling plate made of copper or a low-alloy Copper alloy known for shaft furnaces. This has blind holes for that Passing cooling water and vertical arranged around the heat sink Side flanges and horizontal side flanges. Bridges and in between Lying grooves are in the cooling plate in the area of the heat sink on the inside the side facing the furnace for holding refractory material.
  • a disadvantage of the known copper staves is that these are still relatively massive and so are heavy and expensive.
  • the processing effort is due to the all-round mechanical processing, the Milling grooves, deep hole drilling and through that Welding the pipe connections considerably.
  • the Machined material makes up a significant part of the Total weight and only becomes significantly less
  • the object of the invention is, in contrast to the well-known copper staves both the material and reduce the processing effort considerably and still a stable, the rough demands in the blast furnace operation to create grown cooling element that itself can be assembled with little installation effort and one Lifetime in at least the same order of magnitude as has a blast furnace system.
  • Another object of the invention is through suitable design of the Flow cross section for the cooling water to higher Heating rates for the cooling water to arrive without therefore the minimum speed required for to fall below the cooling water that is necessary to with high thermal loads on the pipe wall to detach and transport away forming vapor bubbles.
  • the hot side is designed so that results in a surface on which Crusts from furniture material can adhere well.
  • a conventional Cu cooling element usually has four has parallel cooling channels in a copper block run parallel to the hot side Cooling element according to the invention from a suitable chosen length of an extruded or rolled Cu profile, which one or more of contains cooling channels deviating from the circular shape.
  • the extruded or rolled profile both adequate rigidity brings with it, through which the rough demands of the Endured blast furnace operation; this applies in particular on the or the fastening ribs on Cooling element on the side facing the furnace Side are arranged. They also serve for Fastening the cooling element to the blast furnace shell.
  • the Lateral ridges parallel to the blast furnace shell of the copper cooling elements ensure a comprehensive coverage Protection of the blast furnace shell.
  • the copper cooling elements can be installed close to the construction site cut to the correct length and bent become.
  • the individual copper cooling elements through the side webs Sawing, abrasive cutting or burning separated or removed, the remaining non-circular Channel cross section bent accordingly and through the Corresponding passage opening in the blast furnace tank guided.
  • Via intermediate pipe sections for the cooling water flow the cooling elements to the cooling circuit connected to the blast furnace.
  • the one in the furnace and outside Duct cross section back to the cold deformation round cross section.
  • Cooling elements To attach the Cooling elements on the tank receive the cooling elements Bores in the ribs running towards the tank; in these ribs grip attached to the furnace Support elements; the connection between the ribs and the support elements are carried out, for example inserted secured dowel pins or bolts. To the mechanical assembly takes place in a known manner a backfilling of the Cu cooling elements with a low heat-conductive refractory mass.
  • Cooling element does require a slightly larger one Material and manufacturing costs due to the Joining the box profiles and manufacturing the foot and head pieces, but it is even flatter than the copper cooling elements with the pipe cross section or sections as well as the attached ribs and can therefore be largely adapted to the curvature of the furnace wall.
  • the attachment to the furnace wall can be done conventionally Blind holes with threads in the cooling element and through mounting screws going through the furnace done on the outside by welded Cover caps are made gastight.
  • Fig. 1 shows a cross section through a cooling element (1) from an extruded or rolled profile section, the inside one or more of elongated cooling channels deviating from the circular shape (2) contains.
  • the cooling element (1) has side webs (3) provided on the of the furnace wall (9) opposite side and continuous in the vertical direction Slag ribs (4) arranged. On the the Blast furnace wall (9) facing side is one Fastening rib (5) arranged.
  • the cooling element (1) is screwed in by means of bolts (7) Bores (6) of the fastener (8), the Blast furnace wall (9) and the fastening rib (5) attached, the space between the cooling element (1) and blast furnace wall (9) is with a refractory backfill (10) filled out.
  • the cooling element (1) are the upper and lower ends of the cooling element (1) with the cooling channel (2) in the direction Blast furnace wall (9) bent through 90 ° and through openings (19) of the blast furnace wall (9).
  • the webs (3) and the slag ribs (4) run still vertical and the webs are formed by recesses (18) each with the next cooling element covering the entire area Terminal connection.
  • the attachment to the Blast furnace wall (9) is carried out by a bolt (7) through the fastening rib (5) and the fastening element (8) is performed.
  • FIG. 3 shows a longitudinal section of the cooling element (1) with the oval cooling duct (2).
  • the webs (3) are arranged on both sides of the cooling channel (2).
  • the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided on the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided.
  • a bolt is through a hole (6) in the fastening rib (5) and the fastening element (8) (7) pushed around the cooling element on the blast furnace wall to fix.
  • Fig. 4 shows a top view of another alternative Embodiment of a cooling element (1) that a rectangular cooling element (11) with a groove and a rectangular cooling element (13) with spring, in each of which a cooling channel (12) is incorporated.
  • the cooling element (1) is by means of fastening elements (14) attached to the blast furnace shell (9). Between Cooling element (1) and blast furnace shell (9) becomes one ff backfill (10) introduced.
  • Fig. 5 shows a side view of one another on the Blast furnace armor (9) attached cooling elements (1, 11, 12, 13).
  • the cooling element (1) is in each case by a upper lid (15) and a lower lid (17) with Pipe pieces (16) for the coolant supply and removal covered flameproof.
  • Fig. 6 shows a longitudinal section through an assembly Cooling element (1) consisting of a rectangular Cooling element (11) with groove, a rectangular cooling element (13) with spring and an upper and lower Cover (15, 17), each with a pipe section (16), and there is a recess (18).
  • the cooling water passes through the pipe section (16) in the lower one Cover (17) and leaves it after flowing through the cooling channels (12) over the upper cover (15), with pipe section (16).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Tunnel Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

The copper cooling element (1) consists of an extruded or rolled profile segment, and has one or more cooling channels (2), as well as lateral web elements (3). On the side facing away from the furnace wall (9), the cooling element has at least one vertical slag rib (4), while on the opposite side it has at least one fixing rib (5).

Description

Die Erfindung betrifft ein Kühlelement für mit einer feuerfesten Auskleidung versehene Schachtöfen, insbesondere Hochöfen, bestehend aus Kupfer oder einer niedriglegierten Kupferlegierung mit im Inneren angeordneten Kühlmittelkanälen.The invention relates to a cooling element for with a refractory lining shaft furnaces, in particular Blast furnaces consisting of copper or one low-alloy copper alloy with inside arranged coolant channels.

Kühlsysteme für den Panzer von Schachtöfen, insbesondere Hochöfen, sind in "Stahl und Eisen", 106 (1986), Nr. 5, Seiten 205 - 210, ausführlich beschrieben. Neben der Kühlung mit sogenannten Kühlkästen hat sich in den letzten Jahren die Kühlung mit Kühlplatten, sogenannten Staves, aus Gußeisen und Kupfer immer stärker durchgesetzt.Cooling systems for the tank of shaft furnaces, in particular Blast furnaces are in "Stahl und Eisen", 106 (1986), No. 5, pages 205-210, described in detail. In addition to cooling with so-called cooling boxes, in recent years cooling with cooling plates, so-called staves, always made of cast iron and copper enforced more.

Aus der DE 39 25 280 ist eine Kühlplatte aus Grauguß bekannt, bei der die Kühlkanäle durch Kühlrohre gebildet wurden, die in den Gußkörper eingegossen waren. Nachteilig ist hierbei, daß zur Vermeidung der Aufkohlung eine Beschichtung der Kühlrohre erforderlich ist, die den Wärmefluß von der Heißseite der Kühlplatte oder der Staves durch den Stavekörper und die Rohrwand zum Kühlwasser hin behindert. Derartige Staves erreichten daher oft hohe Temperaturen, bei denen ein Perlit-Zerfall eintritt (> 760 °C); es bildeten sich Risse im Gußkörper, und schon nach relativ kurzer Betriebszeit wird der Gußwerkstoff vor den Kühlrohren abgetragen.From DE 39 25 280 is a cooling plate made of gray cast iron known in which the cooling channels through cooling pipes were formed, which were poured into the cast body were. The disadvantage here is that to avoid the Carburizing requires a coating of the cooling pipes which is the heat flow from the hot side of the cooling plate or the staves through the stave body and the pipe wall to the cooling water. Staves like that therefore often reached high temperatures at which a Pearlite decay occurs (> 760 ° C); it formed Cracks in the cast body, and after a relatively short time Operating time is the casting material in front of the cooling pipes ablated.

Es wurde versucht, eine längere Haltbarkeit dieser Gußeisen-Staves dadurch zu erreichen, indem man eine Vielzahl von Kühlrohren eingoß und diese teilweise auch in unterschiedlichen Ebenen parallel zur Heißseite anordnete. Dadurch wurden die Grauguß-Staves zwar sehr viel komplizierter und teurer, ihre Haltbarkeit hat sich jedoch nicht in gleichem Maße erhöht. An attempt was made to extend the shelf life of this To achieve cast iron staves by making a Cast in a variety of cooling tubes and some of them in different levels parallel to the hot side ordered. This made the gray cast iron staves very much much more complicated and expensive, their durability has however, does not increase to the same extent.

Eine wesentliche Verbesserung stellten die sogenannten Kupfer-Staves dar, die aus der DE 29 07 511 bekannt sind und aus gewalztem Kupfermaterial hergestellt sind, wobei die Kühlkanäle durch Tieflochbohrung parallel zur Heißseite eingebracht werden. Hierdurch wird ein ungestörter, durch keine Rohrbeschichtung behinderter Wärmefluß erreicht. Derartige Kupfer-Staves sind an ihrer Heißseite deutlich kälter als Staves aus Grauguß, so daß sich dort - anders als bei Grauguß-Staves - eine stabile Kruste aus Möllermaterial bildet, die als Isolierung wirkt. So kommt es, daß Kupfer-Staves trotz der hohen Wärmeleitfähigkeit dieses Materials aus einem Hochofen weniger Wärme abführen als Grauguß-Staves.
Ein weiterer Vorteil der Kupfer-Staves ist es, daß diese konstruktiv dünner (ca. 150 mm) ausgeführt werden können als Grauguß-Staves (ca. 250 mm). Bei einem gegebenen Hochofenprofil erhöht sich das Nutzvolumen bei Verwendung von Kupfer-Staves daher erheblich.The so-called copper staves, which are known from DE 29 07 511 and are made from rolled copper material, represented a significant improvement, the cooling channels being introduced parallel to the hot side through deep-hole drilling. This results in an undisturbed heat flow that is not impeded by any pipe coating. Such copper staves are significantly colder on their hot side than gray cast iron staves, so that - unlike gray cast iron staves - a stable crust of furniture material forms there, which acts as insulation. It happens that copper staves, despite the high thermal conductivity of this material, dissipate less heat from a blast furnace than gray cast iron staves.
Another advantage of the copper staves is that they can be made thinner (approx. 150 mm) than gray cast iron staves (approx. 250 mm). For a given blast furnace profile, the usable volume increases considerably when using copper staves.

Aus der EP 0 741 190 A1 ist eine Kühlplatte aus Kupfer oder einer niedriglegierten Kupferlegierung für Schachtöfen bekannt. Diese weist Sackbohrungen für das Durchleiten von Kühlwasser sowie um den Kühlkörper herum angeordnete vertikale Seitenflansche sowie horizontale Seitenflansche auf. Stege und dazwischen liegende Nuten sind in der Kühlplatte im Bereich des Kühlkörpers an der dem Inneren des Ofens zugewandten Seite zur Halterung von Feuerfestmaterial angeordnet.EP 0 741 190 A1 discloses a cooling plate made of copper or a low-alloy Copper alloy known for shaft furnaces. This has blind holes for that Passing cooling water and vertical arranged around the heat sink Side flanges and horizontal side flanges. Bridges and in between Lying grooves are in the cooling plate in the area of the heat sink on the inside the side facing the furnace for holding refractory material.

Der ausschlaggebende Vorteil der Kupfer-Staves gegenüber Staves aus Gußeisen ist jedoch, daß sie aufgrund der Materialeigenschaften keine Rißbildung zeigen und daß ihr Oberflächenverschleiß extrem gering ist. Bei einem über 10 Jahre gehenden Langzeitversuch wurde ein Materialverlust von nur 3 - 4 mm beobachtet. Hieraus ergibt sich bei 50 mm Rippenhöhe eine rechnerische Lebensdauer von rd. 150 Jahren, die weit über der des zugehörigen Hochofens liegt.The decisive advantage of the copper staves over Cast iron staves, however, is because of them the material properties show no cracking and that their surface wear is extremely low. at a long-term trial over 10 years was Material loss of only 3 - 4 mm observed. From this arithmetical results at 50 mm rib height Lifespan of approx. 150 years, well above that of the associated blast furnace.

Ein Nachteil der bekannten Kupfer-Staves ist es, daß diese immer noch relativ massiv ausgeführt und damit schwer und teuer sind. Der Bearbeitungsaufwand ist durch die allseitige mechanische Bearbeitung, das Einfräsen von Nuten, das Tieflochbohren sowie durch das Einschweißen der Rohranschlüsse erheblich. Das zerspante Material macht einen erheblichen Teil des Gesamtgewichts aus und wird nur zu deutlich geringerem A disadvantage of the known copper staves is that these are still relatively massive and so are heavy and expensive. The processing effort is due to the all-round mechanical processing, the Milling grooves, deep hole drilling and through that Welding the pipe connections considerably. The Machined material makes up a significant part of the Total weight and only becomes significantly less

Preis zurückgenommen. Ein weiterer Nachteil ist, daß beim Tieflochbohren über 2 - 3 m Tiefe bestimmte Kanaldurchmesser nicht unterschritten werden dürfen, da sonst die Gefahr besteht, daß der Bohrer verläuft. Die so entstehenden Kühlkanäle sind größer als erforderlich; das gleiche gilt für die Kühlwassermenge, da eine Mindestgeschwindigkeit von rd. 1,5 m/sec erforderlich ist, um bei hoher thermischer Belastung sich an der Rohrwand evtl. bildende Dampfblasen abzulösen. Somit sind die Kühlwasser-Aufheizraten unwirtschaftlich gering.Price withdrawn. Another disadvantage is that certain channel diameters when drilling deep holes over a depth of 2 - 3 m must not be undercut because otherwise there is a risk that the drill will run. The resulting cooling channels are larger than required; the same applies to the amount of cooling water, since a minimum speed of approx. 1.5 m / sec required is to at high thermal stress any steam bubbles that may form in the pipe wall. The cooling water heating rates are therefore uneconomical low.

Aufgabe der Erfindung ist es, im Gegensatz zu den bekannten Kupfer-Staves sowohl den Material- wie auch den Bearbeitungsaufwand erheblich zu senken und dennoch ein stabiles, den rauhen Beanspruchungen im Hochofenbetrieb gewachsenes Kühlelement zu schaffen, das sich mit geringem Montageaufwand montieren läßt und das eine Lebensdauer in mindestens gleicher Größenordnung wie eine Hochofenanlage aufweist.The object of the invention is, in contrast to the well-known copper staves both the material and reduce the processing effort considerably and still a stable, the rough demands in the blast furnace operation to create grown cooling element that itself can be assembled with little installation effort and one Lifetime in at least the same order of magnitude as has a blast furnace system.

Eine weitere Aufgabe der Erfindung besteht darin, durch geeignete, von der Kreisform abweichende Gestaltung des Strömungsquerschnitts für das Kühlwasser zu höheren Aufheizraten für das Kühlwasser zu gelangen, ohne deshalb die erforderliche Mindestgeschwindigkeit für das Kühlwasser zu unterschreiten, die notwendig ist, um bei hohen thermischen Belastungen an der Rohrwand sich bildende Dampfblasen abzulösen und fortzutransportieren.Another object of the invention is through suitable design of the Flow cross section for the cooling water to higher Heating rates for the cooling water to arrive without therefore the minimum speed required for to fall below the cooling water that is necessary to with high thermal loads on the pipe wall to detach and transport away forming vapor bubbles.

Schließlich wird die Heißseite so gestaltet, daß sich mit geringem Aufwand eine Oberfläche ergibt, an der Krusten aus Möllermaterial gut haften können. Finally, the hot side is designed so that results in a surface on which Crusts from furniture material can adhere well.

Die Lösung der Aufgabe erfolgt in der Weise, wie es in den Ansprüchen 1 sowie 2 angegeben ist, eine weitere vorteilhafte Ausgestaltung der Erfindung wird in den zugeordneten Unteransprüchen 3 - 8 aufgeführt.The task is solved in the manner described in the Claims 1 and 2 is indicated, another advantageous Embodiment of the invention is assigned in the Subclaims 3 - 8 listed.

Eine alternative Lösung der Aufgabe erfolgt in der Weise, wie es in Anspruch 9 angegeben ist, eine weitere vorteilhafte Ausgestaltung der Alternative ist in den zugeordneten Unteransprüchen 10-11 aufgeführt.An alternative solution to the problem is the Way as stated in claim 9, another advantageous embodiment of the alternative is in the associated sub-claims 10-11 listed.

Die gestellte Aufgabe nach den Ansprüchen 1 und 2 wird im einzelnen wie folgt gelöst:The task according to claims 1 and 2 is in detail solved as follows:

Während ein konventionelles Cu-Kühlelement meist vier parallele Kühlkanäle aufweist, die in einem Kupferblock parallel zur Heißseite verlaufen, besteht ein Kühlelement gemäß der Erfindung aus einer passend gewählten Länge eines stranggepreßten oder gewalzten Cu-Profils, welches einen oder mehrere von der Kreisform abweichende Kühlkanäle enthält. Durch entsprechende Rippen, die von dem oder den Kühlkanälen ausgehen, wird erreicht, daß das stranggepreßte oder gewalzte Profil sowohl eine ausreichende Steifigkeit mitbringt, durch die es die rauhen Beanspruchungen des Hochofenbetriebes erträgt; dies bezieht sich insbesondere auf den oder die Befestigungsrippen, die am Kühlelement auf der dem Hochofenpanzer zugewandten Seite angeordnet sind. Sie dienen gleichfalls zur Befestigung des Kühlelements am Hochofenpanzer. Die parallel zum Hochofenpanzer liegenden seitlichen Stege der Cu-Kühlelemente sorgen für einen flächendeckenden Schutz des Hochofenpanzers. Ihre Breite wird so festgelegt, daß sie sich mit dem entsprechenden Steg des Nachbarelements überlappen bzw. bündig abschließen. Hierdurch werden auch die Durchmesser- bzw. Umfangsunterschiede in konischen Teilen des Hochofenpanzers (Rast, Schacht) ausgeglichen. Die in das Ofeninnere ragenden Schlackenrippen an der Heißseite werden durch mechanische Nachbearbeitung so gestaltet, daß sie die Bildung und die stabile Haftung einer Schicht aus festen oder teigigen Möllerstoffen an der Heißseite der Cu-Kühlelemente erleichtern.While a conventional Cu cooling element usually has four has parallel cooling channels in a copper block run parallel to the hot side Cooling element according to the invention from a suitable chosen length of an extruded or rolled Cu profile, which one or more of contains cooling channels deviating from the circular shape. By corresponding fins from the cooling channel or channels going out, it is achieved that the extruded or rolled profile both adequate rigidity brings with it, through which the rough demands of the Endured blast furnace operation; this applies in particular on the or the fastening ribs on Cooling element on the side facing the furnace Side are arranged. They also serve for Fastening the cooling element to the blast furnace shell. The Lateral ridges parallel to the blast furnace shell of the copper cooling elements ensure a comprehensive coverage Protection of the blast furnace shell. Your width will be like this determined that they are with the appropriate web of the neighboring element overlap or finish flush. This also makes the diameter or circumference differences in conical parts of the blast furnace (Rest, shaft) balanced. The inside of the oven protruding slag ribs on the hot side are through mechanical post-processing designed so that they Formation and stable adhesion of a layer solid or doughy stuff on the hot side of the Lighten copper cooling elements.

Die Cu-Kühlelemente können montagenah auf der Baustelle auf die richtige Länge zugeschnitten und gebogen werden. Hierzu werden an den Ober- und Unterseiten der einzelnen Cu-Kühlelemente die seitlichen Stege durch Sägen, Trennschleifen oder Brennen getrennt bzw. entfernt, der verbleibende nicht-kreisförmige Kanalquerschnitt entsprechend umgebogen und durch die entsprechende Durchtrittsöffnung im Hochofenanzer geführt. Über Zwischenrohrstücke für den Kühlwasserdurchfluß werden die Kühlelemente an den Kühlkreislauf des Hochofens angeschlossen. Hierbei kann, um zu möglichst kleinen Durchmessern der Panzeröffnungen zu kommen, der im Hochofenpanzer und außerhalb liegende Kanalquerschnitt durch Kaltverformung wieder auf den runden Querschnitt gebracht werden. Zur Befestigung der Kühlelemente am Panzer erhalten die Kühlelemente Bohrungen in den zum Panzer hin verlaufenden Rippen; in diese Rippen greifen am Hochofenpanzer befestigte Tragelemente ein; die Verbindung zwischen den Rippen und den Tragelementen erfolgt beispielsweise durch eingeschobene gesicherte Paßstifte bzw. Bolzen. Nach der mechanischen Montage erfolgt in bekannter Weise eine Hinterfüllung der Cu-Kühlelemente mit einer niedrig wärmeleitfähigen Feuerfest-Masse.The copper cooling elements can be installed close to the construction site cut to the correct length and bent become. For this purpose, on the top and bottom sides of the individual copper cooling elements through the side webs Sawing, abrasive cutting or burning separated or removed, the remaining non-circular Channel cross section bent accordingly and through the Corresponding passage opening in the blast furnace tank guided. Via intermediate pipe sections for the cooling water flow the cooling elements to the cooling circuit connected to the blast furnace. Here, in order to the smallest possible diameter of the tank openings come, the one in the furnace and outside Duct cross section back to the cold deformation round cross section. To attach the Cooling elements on the tank receive the cooling elements Bores in the ribs running towards the tank; in these ribs grip attached to the furnace Support elements; the connection between the ribs and the support elements are carried out, for example inserted secured dowel pins or bolts. To the mechanical assembly takes place in a known manner a backfilling of the Cu cooling elements with a low heat-conductive refractory mass.

In einer alternativen Ausgestaltung der Erfindung werden stranggepreßte Kupferprofile verwendet, wobei diese rechteckig gestaltet sind und an den Seiten eine Nut und Feder für eine ineinander greifende Verbindung der Kühlelemente aufweisen.In an alternative embodiment of the invention become extruded copper profiles used, which is designed rectangular are and on the sides a tongue and groove for one interlocking connection of the cooling elements exhibit.

Durch das Aneinanderfügen mehrerer solcher Elemente wird ein zusammenhängender Kupferblock mit darin liegenden, rechteckigen Kühlkanälen gebildet. Durch diese Ausführung der Kühlelementseiten wird ein nahtloser Übergang der einzelnen Bauteile erreicht, der zum Ausgleich der Konizität im Hochofenschacht und der Hochofenrast herangezogen wird. Somit ist an allen Stellen ein fugenloser Hitzeschutz des Hochofenpanzers gewährleistet.By joining several such elements together becomes a coherent copper block with it lying, rectangular cooling channels. By this version of the cooling element sides becomes a seamless transition of the individual components achieved, to compensate for the taper in the blast furnace shaft and the blast furnace rest is used. So is at all Provide seamless heat protection for the blast furnace shell guaranteed.

An den Kopfenden der Kühlelemente werden ähnliche stranggepreßte Profile in U-Form, jedoch mit einem größeren Kühlkanalquerschnitt, vorgesetzt. Der Einund Austritt des Kühlwassers erfolgt dann über ein Rohrstück jeweils am Ober- und Unterteil des zusammengesetzten Kühlelements. Ein derartig hergestelltes Kühlelement erfordert zwar einen etwas größeren Material- und Fertigungsaufwand, bedingt durch das Aneinanderfügen der Kastenprofile sowie das Herstellen der Fuß- und Kopfstücke, es ist jedoch noch flacher als die Cu-Kühlelemente mit dem oder den Rohrquerschnitten sowie den angesetzten Rippen gestaltet und kann daher weitgehend der Krümmung der Ofenwand angepaßt werden. Die Befestigung an der Ofenwand kann konventionell über Sackbohrungen mit Gewinde im Kühlelement sowie durch den Ofenpanzer hindurchgehende Befestigungsschrauben erfolgen, die an der Außenseite durch aufgeschweißte Abdeckkappen gasdicht gemacht werden.At the head ends of the cooling elements are similar extruded U-shaped profiles, but with one larger cooling channel cross section, provided. The one and only The cooling water then exits via Pipe piece on the upper and lower part of the composite Cooling element. One made in this way Cooling element does require a slightly larger one Material and manufacturing costs due to the Joining the box profiles and manufacturing the foot and head pieces, but it is even flatter than the copper cooling elements with the pipe cross section or sections as well as the attached ribs and can therefore be largely adapted to the curvature of the furnace wall. The attachment to the furnace wall can be done conventionally Blind holes with threads in the cooling element and through mounting screws going through the furnace done on the outside by welded Cover caps are made gastight.

Die Erfindung wird anhand von schematischen Ausführungszeichnungen näher erläutert. The invention is based on schematic Execution drawings explained in more detail.

Es zeigen:

Fig. 1
einen Querschnitt durch ein Cu-Kühlelement mit Schlackenrippen,
Fig. 2
eine Seitenansicht eines Cu-Kühlelements mit Schlackenrippen,
Fig. 3
ein Längsschnitt eines Cu-Kühlelements mit Schlackenrippen,
Fig. 4
einen Querschnitt durch ein Cu-Kühlelement aus rechteckigen Profilen,
Fig. 5
eine Seitenansicht von übereinander angeordneten Cu-Kühlelementen aus rechteckigen Profilen,
Fig. 6
einen Längsschnitt eines Cu-Kühlelements aus rechteckigen Profilen,
Fig. 7
eine Draufsicht auf den oberen Deckel des Cu-Kühlelements aus rechteckigen Profilen,
Fig. 8
eine Draufsicht auf den unteren Deckel des Cu-Kühlelements aus rechteckigen Profilen.
Show it:
Fig. 1
a cross section through a copper cooling element with slag fins,
Fig. 2
a side view of a copper cooling element with slag fins,
Fig. 3
a longitudinal section of a copper cooling element with slag fins,
Fig. 4
a cross section through a Cu cooling element made of rectangular profiles,
Fig. 5
2 shows a side view of Cu cooling elements made of rectangular profiles arranged one above the other,
Fig. 6
2 shows a longitudinal section of a Cu cooling element made of rectangular profiles,
Fig. 7
a plan view of the upper cover of the Cu cooling element made of rectangular profiles,
Fig. 8
a plan view of the lower cover of the Cu cooling element made of rectangular profiles.

Fig. 1 zeigt einen Querschnitt durch ein Kühlelement (1) aus einem stranggepreßten oder gewalzten Profilabschnitt, das im Inneren ein oder mehrere von der Kreisform abweichende länglich geformte Kühlkanäle (2) enthält.Fig. 1 shows a cross section through a cooling element (1) from an extruded or rolled profile section, the inside one or more of elongated cooling channels deviating from the circular shape (2) contains.

Das Kühlelement (1) ist mit seitlichen Stegen (3) versehen, auf der auf der von der Hochofenwand (9) abgewandten Seite und in vertikaler Richtung durchlaufenden Schlackenrippen (4) angeordnet. Auf der der Hochofenwand (9) zugewandten Seite ist eine Befestigungsrippe (5) angeordnet.The cooling element (1) has side webs (3) provided on the of the furnace wall (9) opposite side and continuous in the vertical direction Slag ribs (4) arranged. On the the Blast furnace wall (9) facing side is one Fastening rib (5) arranged.

Das Kühlelement (1) wird mittels Bolzen (7) in Bohrungen (6) des Befestigungselements (8), der Hochofenwand (9) und der Befestigungsrippe (5) befestigt, der Zwischenraum zwischen Kühlelement (1) und Hochofenwand (9) ist mit einer feuerfesten Hinterfüllung (10) ausgefüllt.The cooling element (1) is screwed in by means of bolts (7) Bores (6) of the fastener (8), the Blast furnace wall (9) and the fastening rib (5) attached, the space between the cooling element (1) and blast furnace wall (9) is with a refractory backfill (10) filled out.

Entsprechend Fig. 2 sind die oberen und unteren Enden des Kühlelements (1) mit dem Kühlkanal (2) in Richtung Hochofenwand (9) um 90° gebogen und durch Öffnungen (19) der Hochofenwand (9) geführt. Die Stege (3) und die Schlackenrippen (4) verlaufen weiterhin vertikal und die Stege bilden durch Aussparungen (18) jeweils mit dem nächsten Kühlelement eine flächendeckende Anschlußverbindung. Die Befestigung an der Hochofenwand (9) erfolgt durch einen Bolzen (7), der durch die Befestigungsrippe (5) und das Befestigungselement (8) geführt ist.2 are the upper and lower ends of the cooling element (1) with the cooling channel (2) in the direction Blast furnace wall (9) bent through 90 ° and through openings (19) of the blast furnace wall (9). The The webs (3) and the slag ribs (4) run still vertical and the webs are formed by recesses (18) each with the next cooling element covering the entire area Terminal connection. The attachment to the Blast furnace wall (9) is carried out by a bolt (7) through the fastening rib (5) and the fastening element (8) is performed.

Fig. 3 zeigt einen Längsschnitt des Kühlelements (1) mit dem ovalen Kühlkanal (2). Beidseitig des Kühlkanals (2) sind die Stege (3) angeordnet. Auf der dem Befestigungselement (8) der Hochofenwand (9) zugewandten Seite ist eine längliche Befestigungsrippe (5) vorgesehen. 3 shows a longitudinal section of the cooling element (1) with the oval cooling duct (2). On both sides of the cooling channel (2) the webs (3) are arranged. On the the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided.

Durch eine Bohrung (6) in der Befestigungsrippe (5) und dem Befestigungselement (8) wird ein Bolzen (7) geschoben, um das Kühlelement an der Hochofenwand zu befestigen.A bolt is through a hole (6) in the fastening rib (5) and the fastening element (8) (7) pushed around the cooling element on the blast furnace wall to fix.

Fig. 4 zeigt eine Draufsicht auf eine weitere, alternative Ausführungsform eines Kühlelements (1), das aus einem rechteckigen Kühlelement (11) mit Nut sowie aus einem rechteckigen Kühlelement (13) mit Feder besteht, in die jeweils ein Kühlkanal (12) eingearbeitet ist.Fig. 4 shows a top view of another alternative Embodiment of a cooling element (1) that a rectangular cooling element (11) with a groove and a rectangular cooling element (13) with spring, in each of which a cooling channel (12) is incorporated.

Das Kühlelement (1) wird mittels Befestigungselementen (14) an den Hochofenpanzer (9) befestigt. Zwischen Kühlelement (1) und Hochofenpanzer (9) wird eine ff-Hinterfüllung (10) eingebracht.The cooling element (1) is by means of fastening elements (14) attached to the blast furnace shell (9). Between Cooling element (1) and blast furnace shell (9) becomes one ff backfill (10) introduced.

Fig. 5 zeigt eine Seitenansicht von übereinander an dem Hochofenpanzer (9) befestigten Kühlelementen (1, 11, 12, 13). Das Kühlelement (1) wird jeweils durch einen oberen Deckel (15) und einen unteren Deckel (17) mit Rohrstücken (16) für die Kühlmittelzu- bzw. -Abfuhr druckfest abgedeckt.Fig. 5 shows a side view of one another on the Blast furnace armor (9) attached cooling elements (1, 11, 12, 13). The cooling element (1) is in each case by a upper lid (15) and a lower lid (17) with Pipe pieces (16) for the coolant supply and removal covered flameproof.

Durch versetzt angeordnete Aussparungen (18) in den Deckeln (15, 17) wird eine überlappende Verlegung der Kühlelemente (1) am Hochofenpanzer (9) erreicht.Through offset recesses (18) in the Cover (15, 17) is an overlapping laying of Cooling elements (1) reached on the blast furnace shell (9).

Fig. 6 zeigt einen Längsschnitt durch ein montagegerechtes Kühlelement (1), das aus einem rechteckigen Kühlelement (11) mit Nut, einem rechteckigen Kühlelement (13) mit Feder sowie einem oberen und unteren Deckel (15, 17), jeweils mit einem Rohrstück (16), und einer Aussparung (18) besteht.Fig. 6 shows a longitudinal section through an assembly Cooling element (1) consisting of a rectangular Cooling element (11) with groove, a rectangular cooling element (13) with spring and an upper and lower Cover (15, 17), each with a pipe section (16), and there is a recess (18).

Das Kühlwasser tritt über das Rohrstück (16) im unteren Deckel (17) ein und verläßt dieses nach Durchströmen der Kühlkanäle (12) über den oberen Deckel (15), mit Rohrstück (16). The cooling water passes through the pipe section (16) in the lower one Cover (17) and leaves it after flowing through the cooling channels (12) over the upper cover (15), with pipe section (16).

Fig. 7 und 8 zeigen jeweils eine Draufsicht auf den oberen Deckel (15) sowie den unteren Deckel (17) mit den Rohrstücken (16) und Segmenten des Kühlelements (11) mit Nut und (13) mit Feder einschließlich der beiden Kühlkanäle (12). 7 and 8 each show a top view of the upper lid (15) and the lower lid (17) with the pipe sections (16) and segments of the cooling element (11) with groove and (13) with tongue including the two cooling channels (12).

Bezugsziffernliste:List of reference numerals:

11
Kühlelementcooling element
22
ovaler Kühlkanaloval cooling channel
33
seitliche Stegeside bars
44
Schlackenrippenslag ribs
55
Befestigungsrippenfixing ribs
66
Bohrung in 5 und 8Hole in 5 and 8
77
Bolzenbolt
88th
Befestigungselementfastener
99
HochofenpanzerBlast furnace tank
1010
feuerfeste Hinterfüllungfireproof backfill
1111
Kühlelement, rechteckig mit NutCooling element, rectangular with groove
1212
Kühlkanalcooling channel
1313
Kühlelement, rechteckig mit FederCooling element, rectangular with spring
1414
Befestigungselementfastener
1515
oberer Deckelupper lid
1616
Rohrstückepipe pieces
1717
unterer Deckellower lid
1818
Nut/AussparungGroove / recess
1919
Öffnungen in 9Openings in 9

Claims (11)

  1. Cooling element for shaft furnaces provided with a refractory lining, particularly blast furnaces, consisting of copper or a low-alloyed copper alloy with coolant channels vertically arranged in the interior, wherein the cooling element consists of a rolled profile section and is provided with lateral webs (3), characterised in that the cooling element (1) contains in the interior at least one cooling channel departing from circular shape, that the cooling element (1) is equipped on the side remote from the shaft furnace wall (9) with at least one continuous slag rib (4) in vertical direction and that the cooling element (1) is equipped on the side facing the shaft furnace wall (9) with at least one fastening rib (5).
  2. Cooling element for shaft furnaces provided with a refractory lining, particularly blast furnaces, consisting of copper or a low-alloyed copper alloy with coolant channels vertically arranged in the interior, wherein the cooling element is provided with lateral webs (3), characterised in that the cooling element consists of an extruded profile section, that the cooling element (1) contains in the interior at least one cooling channel departing from circular shape, that the cooling element (1) is equipped on the side remote from the shaft furnace wall (9) with at least one continuous slag rib (4) in vertical direction and that the cooling element (1) is equipped on the side facing the shaft furnace wall (9) with at least one fastening rib (5).
  3. Cooling element according to claim 1 or 2, characterised in that the upper and lower ends of the cooling element (1) with the cooling channel (2) are bent through 90° in the direction of the shaft furnace wall (9) and that the upper and lower ends of the cooling element (1) are separated from the lateral webs (3).
  4. Cooling element according to claim 1 or 2, characterised in that the cooling element (1) is equipped on the side remote from the shaft furnace wall (9) in vertical direction with two or a plurality of parallelly extending slag ribs (4).
  5. Cooling element (1) according to claim 1 or 2, characterised in that at least one bore (6) is formed in the fastening rib (5).
  6. Cooling element (1) according to claim 1 or 2, characterised in that a cut-out (18) is machined into the webs (3).
  7. Cooling element according to claims 1 or 2 to 6, characterised in that the fastening ribs (5) of the cooling elements (1) are mounted at fastening elements (8) of the shaft furnace wall (9) by means of bolts (7) and the webs (3) are arranged in the recess (18) of the cooling elements (1) to be overlapping.
  8. Cooling element according to claims 1 or 2 to 6, characterised in that the fastening ribs (5) of the cooling elements (1) are mounted at fastening elements (8) of the shaft furnace wall (9) by means of bolts (7) and the webs (3) of the cooling elements (1) are arranged to be flush.
  9. Cooling element (1) for shaft furnaces provided with a refractory lining, particularly blast furnaces, consisting of copper or a low-alloyed copper alloy with coolant channels arranged in the interior, characterised in that the cooling element (1) consists of an extruded rectangular profile section (11) with a groove at one side and an extruded rectangular profile section (13) with a tongue at one side for an interengaging connection, that rectangular cooling channels (12) are arranged in the profile sections (11, 13), that the profile sections (11, 13) are closable by an upper cover (15) and a lower cover (17) and that a respective pipe member (16) is provided laterally in each of the upper cover (15) and the lower cover (17), the pipe members being connected with the cooling channels (12) of the cooling element (1).
  10. Cooling element (1) according to claim 9, characterised in that the cooling element (1) is fastened to the shaft furnace wall (9) by means of fastening elements (14).
  11. Cooling element (1) according to claim 9, characterised in that the upper cover (15) and the lower cover (17) are each provided with a respective cut-out (18).
EP98121263A 1997-11-20 1998-11-07 Cooling devices for shaft furnace Expired - Lifetime EP0918092B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19751356 1997-11-20
DE19751356A DE19751356C2 (en) 1997-11-20 1997-11-20 Cooling elements for shaft furnaces

Publications (2)

Publication Number Publication Date
EP0918092A1 EP0918092A1 (en) 1999-05-26
EP0918092B1 true EP0918092B1 (en) 2003-07-09

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EP98121263A Expired - Lifetime EP0918092B1 (en) 1997-11-20 1998-11-07 Cooling devices for shaft furnace

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US (1) US6257326B1 (en)
EP (1) EP0918092B1 (en)
JP (1) JPH11217609A (en)
KR (1) KR19990045327A (en)
CN (1) CN1080314C (en)
AT (1) ATE244772T1 (en)
AU (1) AU753713B2 (en)
BR (1) BR9804728A (en)
CA (1) CA2254281A1 (en)
DE (2) DE19751356C2 (en)
ES (1) ES2203870T3 (en)
RU (1) RU2210705C2 (en)
TW (1) TW410266B (en)
UA (1) UA49885C2 (en)
ZA (1) ZA9810483B (en)

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ZA9810483B (en) 1999-04-07
AU753713B2 (en) 2002-10-24
JPH11217609A (en) 1999-08-10
ES2203870T3 (en) 2004-04-16
BR9804728A (en) 1999-12-14
CN1080314C (en) 2002-03-06
CN1225395A (en) 1999-08-11
US6257326B1 (en) 2001-07-10
TW410266B (en) 2000-11-01
EP0918092A1 (en) 1999-05-26
DE59808968D1 (en) 2003-08-14
DE19751356A1 (en) 1999-06-10
ATE244772T1 (en) 2003-07-15
KR19990045327A (en) 1999-06-25
UA49885C2 (en) 2002-10-15
CA2254281A1 (en) 1999-05-20
AU9243498A (en) 1999-06-10
RU2210705C2 (en) 2003-08-20
DE19751356C2 (en) 2002-04-11

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