EP0024548A2 - Furnace lay-out, especially for smelting an ore concentrate - Google Patents

Furnace lay-out, especially for smelting an ore concentrate Download PDF

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Publication number
EP0024548A2
EP0024548A2 EP80104347A EP80104347A EP0024548A2 EP 0024548 A2 EP0024548 A2 EP 0024548A2 EP 80104347 A EP80104347 A EP 80104347A EP 80104347 A EP80104347 A EP 80104347A EP 0024548 A2 EP0024548 A2 EP 0024548A2
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EP
European Patent Office
Prior art keywords
furnace
cooling elements
bar
furnace system
wall
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Granted
Application number
EP80104347A
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German (de)
French (fr)
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EP0024548A3 (en
EP0024548B1 (en
Inventor
Friedrich Megerle
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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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

Definitions

  • the invention relates to a furnace system, in particular for melting ore concentrate.
  • the furnace walls that come into contact with the hot aggressive gases and the hot metal or slag bath must be lined fire-proof and cooled.
  • the dividing wall which is immersed in the melting bath from above and extends over the entire width of the furnace, for separating the melt collecting space from the settling stove is a hollow wall provided with cooling channels. If the known furnace partition wall, which extends over the entire furnace width, consists of a single piece, the partition wall would practically no longer be transportable and mountable due to its weight and size. Thermal stresses in the partition could not balance each other out.
  • the furnace wall were bricked and would function as a partition wall immersed in a molten bath, this cannot be practiced taking into account the wear caused by the aggressive slag melt. It goes without saying that such a wall should be cooled and should also be self-supporting.
  • the invention has for its object to avoid these disadvantages and to create a furnace system, the walls, in particular thermally highly stressed partition walls have high strength despite existing cooling channels, are easy to install, can compensate for thermal stresses and have other advantages.
  • the furnace walls consist of individual metal cooling elements through which cooling medium flows and which are arranged one above the other in the form of a bar.
  • the bar-shaped cooling elements each have a web projecting upwards and downwards along their central longitudinal axes, by means of which adjacent cooling elements are connected, in particular by welding.
  • the cooling elements each have the shape of a one-piece T-bar, the T-bars lying one above the other with their legs.
  • the formation of the metallic and provided with cooling channels cooling elements in the form of a T-beam brings with it the particular advantage that, when such cooling elements are placed one on top of the other, two furnace partitions are obtained simultaneously, namely a front beam wall and a leg beam wall, the front beam wall being the partition wall immersed in the melt Separation of the melting or flue gas duct and settling stove and the thigh beam wall running transversely to the front beam wall can form the partition between the melting shaft and flue gas duct of a pyrometallurgical furnace system.
  • the individual metallic, bar-shaped cooling elements have a low weight compared to a one-piece cooling wall, which makes transportation and assembly very easy.
  • the shape and structure of the cooling elements in particular by means of their connecting webs, make it possible to compensate for the thermal stress in the furnace partition, in particular with different thermal loads on both sides of the wall.
  • the bar-shaped cooling elements according to the invention do not have to extend over the entire height of a furnace partition, but only need to be present in the thermally particularly stressed lower wall area, so that the invention According cooling elements are particularly suitable as a support or support structure that is strong enough to be able to build masonry with integrated cooling elements, a tubular membrane wall as a boiler wall or another wall.
  • Figures 3 to 5 are briefly explained. These show a pyrometallurgical furnace system, which is to serve, for example, for melting fine-grained sulfidic lead ore concentrate, with a common housing 10 in which a floating smelting shaft 11, an exhaust gas shaft 12 and a settling furnace 13 for further treatment of the melt are arranged the sulfidic ore concentrate is blown in with a stream of technically pure oxygen.
  • the ore concentrate is roasted and melted in the smelting shaft with instantaneous heating to high temperature in a fraction of a second, even while it is in suspension.
  • the combustion of the sulfide sulfur and possibly other oxidizable components in the oxygen atmosphere usually already provides enough heat to allow the roasting and melting process to proceed autogenously.
  • the melt collects in the melt collecting space 14, while the exhaust gas, together with the dust formed, is drawn off upward through the exhaust duct 12.
  • a primary slag forms on the collected melt in the collecting space 14.
  • the melt flows under the lower edge of a vertical partition wall 15, which is immersed from above into the molten bath or slag bath, into the settling furnace 13. In the settling furnace 13, the melt is reduced and it is given the opportunity to separate into lead and secondary slag that forms, which are tapped separately from the settling furnace.
  • the slag bath surface 16 and the lead bath surface 17 are of the same height in the melt collecting chamber 14 and in the settling hearth 13.
  • the partition 15 prevents the mixing of gases of the oxidation zone and the reduction zone and it enables an independent atmosphere to be maintained in both zones.
  • the furnace shaft 18 and the flue shaft 12 are separated from one another by the furnace partition 18. Through the space between the slag bath level 16 and the lower edge of the furnace partition 18, the exhaust gas is drawn from the smelting shaft 11 into the exhaust gas shaft 12.
  • the two vertical furnace partition walls 15 and 15a and 18, which are perpendicular to one another, are subject to very high thermal loads and must be cooled.
  • these two furnace partitions consist of metallic cooling elements 19, 20, 21 etc. provided with coolant channels, each of which has the shape of a one-piece T-bar and with their legs lying one above the other.
  • the end beam wall forms the partition wall 15a immersed in the melt for separating the melting or exhaust gas shaft 11 or 12 and the settling point 13, and the leg beam wall running transversely to the end beam wall forms the partition wall 18 between the melting shaft 11 and the exhaust shaft 120.
  • the bar-shaped cooling elements each have a web 22, 23, 24, etc., projecting upwards and downwards along their central longitudinal axes, by means of which adjacent cooling elements are connected by welding, as can clearly be seen in FIG. 6.
  • the cooling elements When viewed in cross section, the cooling elements have a coolant channel on each side of the vertical central longitudinal plane. Overall, the T-bar-shaped cooling elements have three continuous coolant channels, of which one channel 25 runs along the front bar and the other two channels 26, 27 each through one half of the front bar and through the adjoining leg beam arranged transversely thereto.
  • the T-bar-shaped cooling elements are made of copper and the three water-carrying pipes 25, 26, 27, which are also made of copper, are cast into the copper elements.
  • the cooling elements can also consist of steel or another metal, depending on which ore concentrate is melted in the furnace.
  • the cooling water flow through the three coolant channels 25, 26 and 27 is clearly indicated by the arrows in FIG. 3.
  • the wall unit constructed from the T-beams is supported in a self-supporting manner only at the three ends of the beams. Connection pipes are connected to the coolant channels 25, 26, 27 at all three end points of the T-bar-shaped cooling elements.
  • connection pipes 28 and 29 are embedded in the refractory material of the furnace outer walls 30, 31, 32, which are less thermally stressed, so that the thermally highly stressed furnace partition walls 15a , 18 are correspondingly strongly cooled as a result of the metallic cooling beam material, while the furnace outer walls which adjoin the furnace partition walls and are less exposed to heat are correspondingly less strongly cooled as a result of the absence of the metallic cooling beam material in these furnace outer walls.
  • the heat flow from the furnace walls can therefore vary depending on the heat load of the walls can be adjusted individually by more or less strong accumulation of metallic chilled beam material in the wall.
  • the spaces between adjacent cooling elements 19, 20, 21 are filled with refractory material 33.
  • the gaps can also be bricked with refractory bricks.
  • the outer surfaces of the furnace partitions can still be protected by a fire-resistant coating. From Fig. 7 it can still be seen that in the outer wall 30 of the furnace, the space between the cooling tubes lying one above the other is filled with refractory bricks 34, while the remaining spaces are filled with refractory material.
  • the advantages which can be achieved with the invention consist mainly in the fact that the individual metallic bar-shaped cooling elements are light in weight in comparison to a one-piece cooling wall, as a result of which transport and assembly are very simplified (type of modular principle). Due to the shape and structure of the cooling elements, in particular through their connecting webs, thermal stress compensation of the furnace partition walls is possible, especially with different thermal loads on both sides of the walls.
  • the bar-shaped cooling elements according to the invention do not need to extend over the entire height of a furnace partition, but only over the lower, particularly stressed area, so that the furnace wall construction according to the invention is ideally suited as a support structure or supporting structure that is strong enough to have masonry on it integrated cooling elements, to build a tubular membrane wall as a boiler wall or another wall.
  • the end beam wall which extends over the entire furnace width of 8 m, for example, is self-supporting - in the critical middle area of the leg beam wall, which runs transversely to the end beam wall, so that the stability of the furnace construction is improved overall.
  • the heat dissipation through the furnace partition can be adjusted by the height of the connecting webs and thus by the distance between the individual bar-shaped cooling elements; For example, the distance between the cooling elements from the underside of the wall to the top of the wall can further increase in accordance with the thermal and mechanical loads on the furnace wall that decrease from bottom to top.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Bei einer pyrometallurgischen Ofenanlage mit einem Schmelzreaktor und einem Herd zur Weiterbehandlung der Schmelze sind die Ofenwände, insbesondere die Ofentrennwände (15a, 18) aus einzelnen, von Kühlmedium durchströmten metallischen Kühlelementen (19, 20, 21) zusammengesetzt, die balkenförmig übereinander angeordnet sind. Die übereinanderliegenden balkenförmigen metallischen Kühlelemente (19, 20,21) können jeweils die Form eines T-Balkens haben.In a pyrometallurgical furnace system with a melting reactor and a stove for further treatment of the melt, the furnace walls, in particular the furnace partition walls (15a, 18), are composed of individual metal cooling elements (19, 20, 21) through which cooling medium flows and which are arranged in a bar shape one above the other. The superimposed bar-shaped metallic cooling elements (19, 20, 21) can each have the shape of a T-bar.

Die metallischen Kühlelemente (19, 20, 21) können jeweils die Form einesT-Balkens haben.The metallic cooling elements (19, 20, 21) can each have the shape of a T-bar.

Die metallischen Kühlelemente (19, 20, 21) haben hauptsächlich den Zweck, die daraus aufgebaute Ofenwand, insbesondere Ofentrennwand stabil, thermisch hoch belastbar und einfach montierbar zu machen, Wärmespannungen auszugleichen und eine selbsttragende Tragkonstruktion für den übrigen Teil der Ofenwandzu bilden.

Figure imgaf001
The main purpose of the metallic cooling elements (19, 20, 21) is to make the furnace wall, in particular the furnace partition, that is built up stable, thermally highly resilient and easy to install, to compensate for thermal stresses and to form a self-supporting structure for the rest of the furnace wall.
Figure imgaf001

Description

Die Erfindung betrifft eine Ofenanlage, insbesondere zum Schmelzen von Erzkonzentrat.The invention relates to a furnace system, in particular for melting ore concentrate.

Bei einer bekannten pyrometallurgischen Ofenanlage (US-PS 3,555,164) wird feinkörniges Erzkonzentrat in einem Schmelzaggregat in einer sauerstoffreichen Gasatmosphäre kontinuierlich geröstet und geschmolzen. In einer Schmelzkammer werden die Schmelze und das gebildete Gas sowie Staub voneinander getrennt. Gas und Staub werden in einem zur Schmelzkammer benachbarten Abgasschacht abgezogen, während die am Boden der Schmelzkammer gesammelte Schmelze und Schlacke unter einer von oben in das Schmelzbad eintauchenden Ofentrennwand hindurch in einen Absetzherd zur Weiterbehandlung der Schmelze und Entfernung der Schlacke eintreten.In a known pyrometallurgical furnace system (US Pat. No. 3,555,164), fine-grained ore concentrate is continuously roasted and melted in a smelting unit in an oxygen-rich gas atmosphere. The melt and the gas and dust formed are separated from one another in a melting chamber. Gas and dust are drawn off in a flue gas duct adjacent to the melting chamber, while the melt and slag collected at the bottom of the melting chamber enter a settling oven under a furnace partition wall immersed in the melting bath from above for further treatment of the melt and removal of the slag.

Die mit den heißen aggresiven Gasen sowie mit dem heißen Metall- bzw. Schlackenbad in Berührung kommenden, Ofenwände müssen unbedingt feuerfest ausgekleidet und gekühlt sein. Bei der bekannten Ofenanlage ist zum Beispiel die von oben in das Schmelzbad eintauchende und sich über die gesamte Ofenbreite erstreckende Trennwand zur Trennung des Schmelzesammelraums vom Absetzherd eine hohle, mit Kühlkanälen versehene Wand. Besteht die bekannte Ofentrennwand, die sich über die gesamte Ofenbreite erstreckt, aus einem einzigen Stück, so wäre die Trennwand infolge ihres Gewichts und ihrer Größe praktisch nicht mehr transport- und montierfähig. Wärmespannungen in der Trennwand könnten sich nicht ausgleichen. Wäre die Ofenwand dagegen gemauert und würde die Funktion einer in ein Schmelzbad eintauchenden Trennwand übernehmen, so kann dies unter Berücksichtigung des Verschleißes durch die aggresive Schlackenschmelze nicht praktiziert werden. Es versteht sich von selbst, daß eine solche Wand gekühlt und außerdem in selbsttragender Konstruktion ausgeführt sein müßte.The furnace walls that come into contact with the hot aggressive gases and the hot metal or slag bath must be lined fire-proof and cooled. In the known furnace system, for example, the dividing wall, which is immersed in the melting bath from above and extends over the entire width of the furnace, for separating the melt collecting space from the settling stove is a hollow wall provided with cooling channels. If the known furnace partition wall, which extends over the entire furnace width, consists of a single piece, the partition wall would practically no longer be transportable and mountable due to its weight and size. Thermal stresses in the partition could not balance each other out. If, on the other hand, the furnace wall were bricked and would function as a partition wall immersed in a molten bath, this cannot be practiced taking into account the wear caused by the aggressive slag melt. It goes without saying that such a wall should be cooled and should also be self-supporting.

Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile zu vermeiden und eine Ofenanlage zu schaffen, deren Wände, insbesondere thermisch hoch belasteten Trennwände trotz vorhandener Kühlkanäle eine hohe Festigkeit aufweisen, einfach montierbar sind, Wärmespannungen ausgleichen können sowie noch weitere Vorteile aufweisen.The invention has for its object to avoid these disadvantages and to create a furnace system, the walls, in particular thermally highly stressed partition walls have high strength despite existing cooling channels, are easy to install, can compensate for thermal stresses and have other advantages.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Ofenwände, insbesondere die Ofentrennwände aus einzelnen, von Kühlmedium durchströmten metallischen Kühlelementen bestehen, die balkenförmig übereinander angeordnet sind. Nach einem weiteren Merkmal der Erfindung weisen die balkenförmigen Kühlelemente entlang deren Mittellängsachsen je einen nach oben und unten vorspringenden Steg auf, mittels denen benachbarte Kühlelemente verbunden sind, insbesondere durch Schweißung. Nach einem besonderen Merkmal der Erfindung haben die Kühlelemente jeweils die Form eines einstückigen T-Balkens, wobei die T-Balken mit ihren Schenkeln übereinander liegen. Die Ausbildung der metallischen und mit Kühlkanälen versehenen Kühlelemente in Form eines T-Balkens bringt den besonderen Vorteil mit sich, daß man beim Aufeinandersetzen derartiger Kühlelemente gleichzeitig zwei Ofentrennwände erhält, nämlich eine Stirnbalkenwand und eine Schenkelbalkenwand, wobei die Stirnbalkenwand die in die Schmelze eintauchende Trennwand zur Trennung von Schmelz- bzw. Abgasschacht und Absetzherd und die quer zur Stirnbalkenwand verlaufende Schenkelbalkenwand die Trennwand zwischen Schmelzschacht und Abgasschacht einer pyrometallurgischen Ofenanlage bilden können.According to the invention, this object is achieved in that the furnace walls, in particular the furnace partition walls, consist of individual metal cooling elements through which cooling medium flows and which are arranged one above the other in the form of a bar. According to a further feature of the invention, the bar-shaped cooling elements each have a web projecting upwards and downwards along their central longitudinal axes, by means of which adjacent cooling elements are connected, in particular by welding. According to a special feature of the invention, the cooling elements each have the shape of a one-piece T-bar, the T-bars lying one above the other with their legs. The formation of the metallic and provided with cooling channels cooling elements in the form of a T-beam brings with it the particular advantage that, when such cooling elements are placed one on top of the other, two furnace partitions are obtained simultaneously, namely a front beam wall and a leg beam wall, the front beam wall being the partition wall immersed in the melt Separation of the melting or flue gas duct and settling stove and the thigh beam wall running transversely to the front beam wall can form the partition between the melting shaft and flue gas duct of a pyrometallurgical furnace system.

Auf jeden Fall haben die einzelnen metallischen balkenförmigen Kühlelemente im Vergleich zu einer einstückigen Kühlwand ein geringes Gewicht, wodurch Transport und Montage sehr vereinfacht sind. Durch Form und Aufbau der Kühlelemente, insbesondere durch deren Verbindungsstege, ist ein Wärmespannungsausgleich der Ofentrennwand möglich, besonders bei unterschiedlicher Wärmebelastung an beiden Seiten der Wand. Die erfindungsgemäßen balkenförmigen Kühlelemente müssen sich nicht über die gesamte Höhe einer Ofentrennwand erstrecken, sondern brauchen nur im thermisch besonders beanspruchten unteren Wandbereich vorhanden sein, so daß die erfindungsgemäßen Kühlelementen besonders geeignet sind als Unterstützungs- bzw. Tragkonstruktion,' die fest genug ist, um darauf ein Mauerwerk mit eingebundenen Kühlelementen, eine Rohrmembranwand als Kesselwand oder eine andere Wand aufbauen zu können.In any case, the individual metallic, bar-shaped cooling elements have a low weight compared to a one-piece cooling wall, which makes transportation and assembly very easy. The shape and structure of the cooling elements, in particular by means of their connecting webs, make it possible to compensate for the thermal stress in the furnace partition, in particular with different thermal loads on both sides of the wall. The bar-shaped cooling elements according to the invention do not have to extend over the entire height of a furnace partition, but only need to be present in the thermally particularly stressed lower wall area, so that the invention According cooling elements are particularly suitable as a support or support structure that is strong enough to be able to build masonry with integrated cooling elements, a tubular membrane wall as a boiler wall or another wall.

Die Erfindung und deren weiteren Vorteile werden anhand des in den Figuren schematisch dargestellten Ausführungsbeispieles näher erläutert. Es zeigt:

  • Fig. 1 in perspektivischer Darstellung zwei rechtwinklig zueinander angeordnete Ofentrennwände, die aus geradlinigen balkenförmigen Kühlelementen und aus T-balkenförmigen Kühlelementen aufgebaut sind,
  • Fig. 2 die Draufsicht auf ein T-balkenförmiges Kühlelement,
  • Fig. 3 einen Horizontalschnitt durch eine pyrometallurgische Ofenanlage längs der Linie III - III der Fig. 4,
  • Fig. 4 einen Vertikalschnitt durch die Ofenanlage längs der Linie IV - IV der Fig. 3,
  • Fig. 5 einen Vertikalschnitt längs der Linie V - V der Fig. 3,
  • Fig. 6 in vergrößerter Darstellung die Einzelheit VI der Fig. 4,
  • Figo 7 in vergrößerter Darstellung die Einzelheit VII der Fig. 5.
The invention and its further advantages are explained in more detail with reference to the exemplary embodiment shown schematically in the figures. It shows:
  • 1 is a perspective view of two furnace partitions arranged at right angles to one another, which are made up of straight, bar-shaped cooling elements and T-bar-shaped cooling elements,
  • 2 shows the top view of a T-bar-shaped cooling element,
  • Fig . 3 shows a horizontal section through a pyrometallurgical furnace system along the line III-III of FIG. 4,
  • 4 shows a vertical section through the furnace system along the line IV-IV of FIG. 3,
  • 5 is a vertical section along the line V - V of FIG. 3,
  • Fi g . 6 in an enlarged view detail VI of FIG. 4,
  • FIG o 7 in an enlarged view of the detail VII of Fig. 5.

Zunächst werden die Figuren 3 bis 5 kurz erläutert. Diese zeigen eine pyrometallurgische Ofenanlage, die zum Beispiel zur Erschmelzung von feinkörnigem sulfidischem Bleierzkonzentrat dienen soll, mit einem gemeinsamen Gehäuse 10, in welchem ein Schwebeschmelzschacht 11, ein Abgasschacht 12 und ein Absetzherd 13 zur Weiterbehandlung der Schmelze angeordnet sindo In den vertikalen Schmelzschacht 11 wird von oben das sulfidische Erzkonzentrat mit einem Strom technisch reinen Sauerstoffs eingeblasen.First, Figures 3 to 5 are briefly explained. These show a pyrometallurgical furnace system, which is to serve, for example, for melting fine-grained sulfidic lead ore concentrate, with a common housing 10 in which a floating smelting shaft 11, an exhaust gas shaft 12 and a settling furnace 13 for further treatment of the melt are arranged the sulfidic ore concentrate is blown in with a stream of technically pure oxygen.

Das Erzkonzentrat wird im Schmelzschacht bei momentaner Erhitzung auf hohe Temperatur in Bruchteilen von Sekunden, noch während es sich im Schwebezustand befindet, geröstet und geschmolzen. Die Verbrennung des Sulfidschwefels und gegebenenfalls anderer oxidierbarer Bestandteile in der Sauerstoffatmosphäre liefert meist bereits genügend Wärme, um den Röst- und Schmelzvorgang autogen ablaufen zu lassen. Die Schmelze sammelt sich im Schmelzesammelraum 14, während das Abgas zusammen mit gebildetem Staub nach oben durch den Abgasschacht 12 abgezogen wird. Im Sammelraum 14 bildet sich auf der gesammelten Schmelze eine Primärschlacke. Die Schmelze fließt unter der Unterkante einer vertikalen, von oben in das Schmelzbad bzw. Schlackenbad eintauchenden Trennwand 15 in den Absetzherd 13 ein. Im Absetzherd 13 wird die Schmelze reduziert und sie erhält Gelegenheit, sich in Blei und sich bildende Sekundärschlacke zu trennen, welche aus dem Absetzherd getrennt abgestochen werden.The ore concentrate is roasted and melted in the smelting shaft with instantaneous heating to high temperature in a fraction of a second, even while it is in suspension. The combustion of the sulfide sulfur and possibly other oxidizable components in the oxygen atmosphere usually already provides enough heat to allow the roasting and melting process to proceed autogenously. The melt collects in the melt collecting space 14, while the exhaust gas, together with the dust formed, is drawn off upward through the exhaust duct 12. A primary slag forms on the collected melt in the collecting space 14. The melt flows under the lower edge of a vertical partition wall 15, which is immersed from above into the molten bath or slag bath, into the settling furnace 13. In the settling furnace 13, the melt is reduced and it is given the opportunity to separate into lead and secondary slag that forms, which are tapped separately from the settling furnace.

Die Schlackenbadoberfläche 16 und die Bleibadoberfläche 17 stehen im Schmelzesammelraum 14 und im Absetzherd 13 gleich hoch. Die Trennwand 15 verhindert die Vermischung von Gasen der Oxidationszone und der Reduktionszone und sie ermöglicht, daß in beiden Zonen eine voneinander unabhängige Atmosphäre aufrechterhalten werden kann. Durch die Ofentrennwand 18 sind Schmelzschacht 11 und Abgasschacht 12 voneinander getrennt. Durch den Zwischenraum zwischen dem Schlackenbadspiegel 16 und der Unterkante der Ofentrennwand 18 zieht das Abgas vom Schmelzschacht 11 in den Abgasschacht 12 ab.The slag bath surface 16 and the lead bath surface 17 are of the same height in the melt collecting chamber 14 and in the settling hearth 13. The partition 15 prevents the mixing of gases of the oxidation zone and the reduction zone and it enables an independent atmosphere to be maintained in both zones. The furnace shaft 18 and the flue shaft 12 are separated from one another by the furnace partition 18. Through the space between the slag bath level 16 and the lower edge of the furnace partition 18, the exhaust gas is drawn from the smelting shaft 11 into the exhaust gas shaft 12.

Die beiden senkrecht zueinander stehenden vertikalen Ofentrennwände 15 bzw. 15a und 18 sind thermisch sehr hoch belastet und müssen unbedingt gekühlt sein. Diese beiden Ofentrennwände bestehen gemäß dem die Erfindung erläuternden Ausführungsbeispiel aus metallischen, mit Kühlmittelkanälen versehenen Kühlelementen 19, 20, 21 usw., die jeweils die Form eines einstückigen T-Balkens haben und mit ihren Schenkeln übereinanderliegen. Bei den übereinander angeordneten T-balkenförmigen Kühlelementen 19, 20, 21 usw. bildet die Stirnbalkenwand die in die Schmelze eintauchende Trennwand 15a zur Trennung von Schmelz- bzw. Abgasschacht 11 bzw. 12 und Absetzherd 13 und die quer zur Stirnbalkenwand verlaufende Schenkelbalkenwand bildet die Trennwand 18 zwischen Schmelzschacht 11 und Abgasschacht 120 Die balkenförmigen Kühlelemente weisen entlang deren Mittellängsachsen je einen nach oben und unten vorspringenden Steg 22, 23, 24 usw. auf, mittels denen benachbarte Kühlelemente durch Schweißung verbunden sind, deutlich zu sehen in Fig. 6.The two vertical furnace partition walls 15 and 15a and 18, which are perpendicular to one another, are subject to very high thermal loads and must be cooled. According to the exemplary embodiment which explains the invention, these two furnace partitions consist of metallic cooling elements 19, 20, 21 etc. provided with coolant channels, each of which has the shape of a one-piece T-bar and with their legs lying one above the other. In the case of the T-bar-shaped cooling elements 19, 20, 21 etc. arranged one above the other, the end beam wall forms the partition wall 15a immersed in the melt for separating the melting or exhaust gas shaft 11 or 12 and the settling point 13, and the leg beam wall running transversely to the end beam wall forms the partition wall 18 between the melting shaft 11 and the exhaust shaft 120. The bar-shaped cooling elements each have a web 22, 23, 24, etc., projecting upwards and downwards along their central longitudinal axes, by means of which adjacent cooling elements are connected by welding, as can clearly be seen in FIG. 6.

Die Kühlelemente haben zu beiden Seiten der vertikalen Mittellängsebene im Querschnitt betrachtet je einen Kühlmittelkanal. Insgesamt weisen die T-balkenförmigen Kühlelemente drei durchgehende Kühlmittelkanäle auf, von denen ein Kanal 25 längs des Stirnbalkens und die zwei anderen Kanäle 26, 27 durch je eine Stirnbalkenhälfte und durch den sich daran anschließenden, quer dazu angeordneten Schenkelbalken verlaufen.When viewed in cross section, the cooling elements have a coolant channel on each side of the vertical central longitudinal plane. Overall, the T-bar-shaped cooling elements have three continuous coolant channels, of which one channel 25 runs along the front bar and the other two channels 26, 27 each through one half of the front bar and through the adjoining leg beam arranged transversely thereto.

Im vorliegenden Fall bestehen die T-balkenförmigen Kühlelemente aus Kupfer und die ebenfalls aus Kupfer bestehenden drei wasserführenden Rohre 25, 26, 27 sind in die Kupferelemente eingegossen. Die Kühlelemente können aber auch aus Stahl oder aus einem anderen Metall bestehen, je nachdem welches Erzkonzentrat in der Ofenanlage geschmolzen wird. Die Kühlwasserführung jeweils durch die drei Kühlmittelkanäle 25, 26,und 27 ist durch die Pfeile in Fig. 3 deutlich angezeigt. Wie insbesondere aus Fig. 3 klar hervorgeht, ist die aus den T-Balken aufgebaute Wandeinheit freitragend nur an den drei Balkenendstellen gelagert. An die Kühlmittelkanäle 25," 26, 27 sind an allen drei Endstellen der T-balkenförmigen Kühlelemente Anschlußrohrleitungen angeschlossen. Die Anschlußrohrleitungen 28 und 29 sind im feuerfesten Material der thermisch weniger belasteten Ofenaußenwände 30, 31, 32 eingebettet, so daß die thermisch hochbelasteten Ofentrennwände 15a, 18 infolge des metallischen Kühlbalkenmaterials entsprechend stark gekühlt sind, während die an die Ofentrennwände anschließenden Ofenaußenwände, die weniger wärmebelastet sind, infolge des Fehlens des metallischen Kühlbalkenmaterials in diesen Ofenaußenwänden entsprechend weniger stark gekühlt werden. Der Wärmeabfluß aus den Ofenwänden kann also je nach Wärmebelastung der Wände durch mehr oder weniger starke Anhäufung von metallischem Kühlbalkenmaterial in der Wand individuell eingestellt werden.In the present case, the T-bar-shaped cooling elements are made of copper and the three water-carrying pipes 25, 26, 27, which are also made of copper, are cast into the copper elements. The cooling elements can also consist of steel or another metal, depending on which ore concentrate is melted in the furnace. The cooling water flow through the three coolant channels 25, 26 and 27 is clearly indicated by the arrows in FIG. 3. As can be clearly seen in particular from FIG. 3, the wall unit constructed from the T-beams is supported in a self-supporting manner only at the three ends of the beams. Connection pipes are connected to the coolant channels 25, 26, 27 at all three end points of the T-bar-shaped cooling elements. The connection pipes 28 and 29 are embedded in the refractory material of the furnace outer walls 30, 31, 32, which are less thermally stressed, so that the thermally highly stressed furnace partition walls 15a , 18 are correspondingly strongly cooled as a result of the metallic cooling beam material, while the furnace outer walls which adjoin the furnace partition walls and are less exposed to heat are correspondingly less strongly cooled as a result of the absence of the metallic cooling beam material in these furnace outer walls. The heat flow from the furnace walls can therefore vary depending on the heat load of the walls can be adjusted individually by more or less strong accumulation of metallic chilled beam material in the wall.

Die Zwischenräume zwischen benachbarten Kühlelementen 19, 20, 21, sind mit feuerfestem Material 33 ausgefüllt. Die Zwischenräume können auch mit feuerfesten Steinen ausgemauert sein. Die Außenflächen der Ofentrennwände können noch durch eine feuerfeste Bestampfung geschützt sein. Aus Fig. 7 geht noch hervor, daß in der Ofenaußenwand 30 der Zwischenraum zwischen übereinanderliegenden Kühlrohren mit feuerfesten Steinen 34 ausgefüllt ist, während die übrigen noch verbleibenden Zwischenräume mit feuerfestem Material ausgestampft sind.The spaces between adjacent cooling elements 19, 20, 21 are filled with refractory material 33. The gaps can also be bricked with refractory bricks. The outer surfaces of the furnace partitions can still be protected by a fire-resistant coating. From Fig. 7 it can still be seen that in the outer wall 30 of the furnace, the space between the cooling tubes lying one above the other is filled with refractory bricks 34, while the remaining spaces are filled with refractory material.

Die mit der Erfindung erzielbaren Vorteile bestehen hauptsächlich darin, daß die einzelnen metallischen balkenförmigen Kühlelemente ein geringes Gewicht haben im Vergleich zu einer einstückigen Kühlwand, wodurch Transport und Montage sehr vereinfacht sind (Art Baukastenprinzip). Durch Form und Aufbau der Kühlelemente, insbesondere durch deren Verbindungsstege, ist ein Wärmespannungsausgleich der Ofentrennwände möglich, besonders bei unterschiedlicher Wärmebelastung an beiden Seiten der Wände. Die erfindungsgemäßen balkenförmigen Kühlelemente brauchen sich nicht über die gesamte Höhe einer Ofentrennwand zu erstrecken, sondern nur über deren unteren, besonders belasteten Bereich, so daß die erfindungsgemäße Ofenwandkonstruktion ideal als Unterstützungskonstruktion bzw. Tragkonstruktion geeignet ist, die fest genug ist, um darauf ein Mauerwerk mit eingebundenen Kühlelementen, eine Rohrmembranwand als Kesselwand oder eine andere Wand aufbauen zu können. Bei aus T-balkenförmigen Kühlelementen aufgebauten Ofentrennwänden ist die Stirnbalkenwand, die sich über die gesamte Ofenbreite von z.B. 8 m freitragend erstreckt,-im kritischen mittleren Bereich von der quer zur Stirnbalkenwand verlaufenden Schenkelbalkenwand stabil gehalten, wodurch die Ofenkonstruktion in ihrer Stabilität insgesamt verbessert wird. Durch die Höhe der Verbindungsstege und damit durch den Abstand der einzelnen balkenförmigen Kühlelemente voneinander kann die Wärmeabführung durch die Ofentrennwand eingestellt werden; so kann zum Beispiel der Abstand der Kühlelemente voneinander von der Wandunterseite zur Wandoberseite hin weiter werden entsprechend der von unten nach oben abnehmenden thermischen sowie auch mechanischen Belastung der Ofenwand.The advantages which can be achieved with the invention consist mainly in the fact that the individual metallic bar-shaped cooling elements are light in weight in comparison to a one-piece cooling wall, as a result of which transport and assembly are very simplified (type of modular principle). Due to the shape and structure of the cooling elements, in particular through their connecting webs, thermal stress compensation of the furnace partition walls is possible, especially with different thermal loads on both sides of the walls. The bar-shaped cooling elements according to the invention do not need to extend over the entire height of a furnace partition, but only over the lower, particularly stressed area, so that the furnace wall construction according to the invention is ideally suited as a support structure or supporting structure that is strong enough to have masonry on it integrated cooling elements, to build a tubular membrane wall as a boiler wall or another wall. In the case of a furnace partition made of T-bar cooling elements walls, the end beam wall, which extends over the entire furnace width of 8 m, for example, is self-supporting - in the critical middle area of the leg beam wall, which runs transversely to the end beam wall, so that the stability of the furnace construction is improved overall. The heat dissipation through the furnace partition can be adjusted by the height of the connecting webs and thus by the distance between the individual bar-shaped cooling elements; For example, the distance between the cooling elements from the underside of the wall to the top of the wall can further increase in accordance with the thermal and mechanical loads on the furnace wall that decrease from bottom to top.

Claims (9)

1. Ofenanlage, insbesondere zum Schmelzen von Erzkonzentrat, dadurch gekennzeichnet, daß die Ofenwände, insbesondere die Ofentrennwände (15a, 18) aus einzelnen, von Kühlmedium durchströmten metallischen Kühlelementen (19, 20, 21) bestehen, die balkenförmig übereinander angeordnet sind.1. Furnace system, in particular for melting ore concentrate, characterized in that the furnace walls, in particular the furnace partition walls (15a, 18) consist of individual, through which cooling medium flows through metallic cooling elements (19, 20, 21) which are arranged in a bar shape one above the other. 2. Ofenanlage nach Anspruch 1, dadurch gekennzeichnet, daß die balkenförmigen Kühlelemente entlang deren Mittellängsachsen je einen nach oben und unten vorspringenden Steg (22, 23, 24) aufweisen, mittels denen benachbarte Kühlelemente verbunden sind, insbesondere durch Schweißung.2. Furnace system according to claim 1, characterized in that the bar-shaped cooling elements along their central longitudinal axes each have an up and down projecting web (22, 23, 24) by means of which adjacent cooling elements are connected, in particular by welding. 3. Ofenanlage nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Kühlelemente (20) zu beiden Seiten der vertikalen Mittellängsebene im Querschnitt betrachtet je einen Kühlmediumkanal (25 bzw. 26 bzw. 27) aufweisen.3. Furnace system according to claims 1 and 2, characterized in that the cooling elements (20) on both sides of the vertical central longitudinal plane viewed in cross section each have a cooling medium channel (25 or 26 or 27). 4. Ofenanlage nach:Anspruch 2, dadurch gekennzeichnet, daß die Zwischenräume zwischen benachbarten Kühlelementen (19, 20, 21) mit feuerfestem Material (33) ausgefüllt sind.4. Furnace system according to : claim 2, characterized in that the spaces between adjacent cooling elements (19, 20, 21) are filled with refractory material (33). 5. Ofenanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die metallischen Kühlelemente (19, 20, 21) jeweils in Form eines einstückigen T-Balkens haben und mit ihren Schenkeln übereinanderliegen.5. Furnace system according to one of claims 1 to 4, characterized in that the metallic cooling elements (19, 20, 21) each have the form of a one-piece T-beam and lie one above the other with their legs. 6. Ofenanlage nach Anspruch 5, dadurch gekennzeichnet, daß die T-balkenförmigen Kühlelemente (19, 20, 21) wenigstens die Tragkonstruktion für zwei Ofentrennwände einer pyrometallurgischen Ofenanlage bilden, wobei die Stirnbalkenwand die in die Schmelze eintauchende Trennwand (15a) zur Trennung von Schmelz- bzw. Abgasschacht (11 bzw.12) und Absetzherd (13) und die quer zur Stirnbalkenwand verlaufende Schenkelbalkenwand die Trennwand (18) zwischen Schmelzschacht (11) und Abgasschacht (12) bilden.6. Furnace system according to claim 5, characterized in that the T-bar-shaped cooling elements (19, 20, 21) form at least the support structure for two furnace partitions of a pyrometallurgical furnace system, the end beam wall being the plunging into the melt partition (15a) for the separation of melt - or flue gas duct (11 or 12) and settling point (13) and the thigh beam wall running transversely to the front beam wall form the partition (18) between the melting duct (11) and the flue gas duct (12). 7a Ofenanlage nach den Ansprüchen 5 und 6, dadurch gekennzeichnet, daß die aus den T-Balken aufgebaute Wandeinheit freitragend nur an den drei Balkenendstellen gelagert ist.7a furnace system according to claims 5 and 6, characterized in that the wall unit constructed from the T-beams is supported cantilevered only at the three beam end points. 8. Ofenanlage nach Anspruch 5, dadurch gekennzeichnet, daß die T-balkenförmigen Kühlelemente drei Kühlmediumkanäle aufweisen, von denen ein Kanal (25) längs des Stirnbalkens und die zwei anderen Kanäle (26, 27) durch je eine Stirnbalkenhälfte und durch den sich daran anschließenden, quer dazu angeordneten Schenkelbalken verlaufen.8. Furnace system according to claim 5, characterized in that the T-bar-shaped cooling elements have three cooling medium channels, of which one channel (25) along the front beam and the two other channels (26, 27) through a respective front beam half and through the adjoining one , transverse to the leg beam. 9. Ofenanlage nach Anspruch 8, dadurch gekennzeichnet, daß sich an die Kühlmediumkanäle (25, 26, 27) an allen drei Endstellen der T-balkenförmigen Kühlelemente Rohrleitungen (28, 29) anschließen, die wenigstens zum Teil im feuerfesten Material der thermisch weniger belasteten Ofenaußenwände (30, 31, 32) eingebettet sind.9. Furnace system according to claim 8, characterized in that connect to the cooling medium channels (25, 26, 27) at all three end points of the T-bar-shaped cooling elements pipes (28, 29), which are at least partially in the refractory material of the thermally less stressed Oven outer walls (30, 31, 32) are embedded.
EP80104347A 1979-09-01 1980-07-24 Furnace lay-out, especially for smelting an ore concentrate Expired EP0024548B1 (en)

Applications Claiming Priority (2)

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DE19792935394 DE2935394A1 (en) 1979-09-01 1979-09-01 OVEN PLANT, ESPECIALLY FOR MELTING ORE CONCENTRATE
DE2935394 1979-09-01

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EP0024548A2 true EP0024548A2 (en) 1981-03-11
EP0024548A3 EP0024548A3 (en) 1981-03-18
EP0024548B1 EP0024548B1 (en) 1983-12-07

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EP (1) EP0024548B1 (en)
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CA (1) CA1150503A (en)
DE (2) DE2935394A1 (en)
IN (1) IN154848B (en)
SU (1) SU1048992A3 (en)
ZA (1) ZA805394B (en)

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DE4431293A1 (en) * 1994-09-02 1996-03-07 Abb Management Ag Furnace vessel for a direct current arc furnace
DE102016107284A1 (en) * 2016-04-20 2017-10-26 Kme Germany Gmbh & Co. Kg Cooling plate for a cooling element for metallurgical furnaces

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DE3427088A1 (en) * 1984-07-18 1986-01-30 Korf Engineering GmbH, 4000 Düsseldorf DEVICE FOR COOLING A HOT PRODUCT GAS
DE8709886U1 (en) * 1987-07-18 1988-11-17 Reining-Heisskühlung, 4330 Mülheim Cooling element for metallurgical furnaces
ID26044A (en) * 1999-02-03 2000-11-16 Nippon Steel Corp WATER COOLING PANEL FOR WALL AND ROOF ELECTRIC BOW

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Publication number Priority date Publication date Assignee Title
FR2517420A1 (en) * 1981-11-27 1983-06-03 Inst Ochistke T Blast furnace cooling plate - has zigzag cooling pipe in zigzag meal plate and refractory filled cut=outs
DE4431293A1 (en) * 1994-09-02 1996-03-07 Abb Management Ag Furnace vessel for a direct current arc furnace
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DE102016107284A1 (en) * 2016-04-20 2017-10-26 Kme Germany Gmbh & Co. Kg Cooling plate for a cooling element for metallurgical furnaces

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CA1150503A (en) 1983-07-26
DE2935394A1 (en) 1981-03-26
AU6145180A (en) 1981-03-05
EP0024548A3 (en) 1981-03-18
DE3065824D1 (en) 1984-01-12
EP0024548B1 (en) 1983-12-07
ZA805394B (en) 1981-08-26
US4337927A (en) 1982-07-06
IN154848B (en) 1984-12-15
SU1048992A3 (en) 1983-10-15

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