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EP0060239B1 - Outlet trough for molten metal - Google Patents

Outlet trough for molten metal Download PDF

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Publication number
EP0060239B1
EP0060239B1 EP82890030A EP82890030A EP0060239B1 EP 0060239 B1 EP0060239 B1 EP 0060239B1 EP 82890030 A EP82890030 A EP 82890030A EP 82890030 A EP82890030 A EP 82890030A EP 0060239 B1 EP0060239 B1 EP 0060239B1
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EP
European Patent Office
Prior art keywords
spout
coolant
metal jacket
channel
pig iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82890030A
Other languages
German (de)
French (fr)
Other versions
EP0060239A1 (en
Inventor
Max Vorderwinkler
Gerhard Dipl.-Ing. Mitter
Paul Ing. Müllner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Voestalpine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0060239A1 publication Critical patent/EP0060239A1/en
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Publication of EP0060239B1 publication Critical patent/EP0060239B1/en
Expired legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/14Discharging devices, e.g. for slag

Definitions

  • the invention relates to a channel for a molten metal, in particular a tapping channel of a blast furnace for producing pig iron, with a trough-shaped metal jacket which is provided with a refractory lining which receives the molten metal and with at least one cavity through which a cooling medium flows.
  • Pig iron and slag are tapped from a blast furnace at regular intervals. Pig iron and slag must be fed separately to the transport containers provided for removal from the blast furnace area. Pig iron and slag are separated in the tapping main channel, from which they are transferred to their own iron and slag channel.
  • Tapping channels with a large cross-section have recently become established, in which the pig iron also remains between the tapping. Such channels allow longer service lives than the previously used channels that were emptied after each tapping.
  • cracks for molten metal in particular the gutters with a large cross-section, form cracks in the refractory lining.
  • These cracks often extend not only through the wear lining with which such channels are usually lined, but also through the permanent lining up to the sheet metal armor.
  • Such cracks form dangerous weak points in the gutter, since when these cracks are filled with molten pig iron (called "joint runner"), pig iron breakthroughs can occur if the sheet metal armor is melted. Pig iron breakthroughs not only cause considerable damage to the channels themselves and to the stage construction, they also reduce the availability of the furnace. The operating personnel is also endangered. The time and cost of a repair after a pig iron breakthrough caused by a joint runner is considerable.
  • a tapping channel which is made of several parts, the side walls and the bottom of the sheet metal armor are formed from individual sheets which are non-positively connected at their mutual contact points.
  • the fire-resistant lining of the channels is fixed in place on the front sides of the stage construction. Even with a gutter of this type there is a risk of hot metal breakthrough caused by a joint runner. In addition, the frictional sliding of the contacting sheets of the sheet metal armor during operation is problematic.
  • the invention aims at avoiding these disadvantages and difficulties and has as its object to create a gutter of the type described above, in which cracks and thus fungus runners and gutter breakthroughs caused by them are avoided in spite of the wall thickness of the refractory lining being as small as possible. Furthermore, the channel should allow the cooling medium to be distributed according to its heat load.
  • This object is achieved in that within the cavity of the metal shell from a distribution box arranged at one end of the channel, the cooling medium conducting, extending in the longitudinal direction of the channel ribs are provided and that air is provided as the cooling medium.
  • the cavity of the metal jacket is expediently subdivided by means of the ribs into individual segments which are supplied with cooling medium independently of one another.
  • discharge lines for the cooling medium are connected to one end of the channel, in which control valves are provided for controlling the cooling medium flow.
  • Another object of the invention is therein see that the storage of the gutter should not create any stresses in it that could also be responsible for joint runs.
  • This object is achieved in that the metal jacket is fixed on the one hand in its longitudinal direction by means of a fixed bearing on the foundation and on the other hand is displaceably mounted on the foundation by means of rollers for absorbing longitudinal expansions.
  • the metal jacket is expediently inserted into a profile frame, the profile frame advantageously having laterally projecting supports at the upper edge of the metal jacket, which are supported relative to the foundation by rollers.
  • the rollers are divided into two roller bodies by means of a peripheral groove and are guided by means of a guide bar arranged on the foundation and engaging in the groove.
  • FIGS. 1 and 2 each showing a longitudinal section through a groove, one (FIG. 1) the fixed point of the groove in the area of the pig iron tapping and one (FIG. 2) the Fixed point of the gutter is provided at the opposite end.
  • FIG. 3 illustrates, on an enlarged scale, a section which is taken along lines 111-111 of FIGS. 1 and 2.
  • Figure 4 is a view in the direction of arrow IV of the figure. 3;
  • Figure 5 shows a partially sectioned perspective view of the sheet metal armor of the channel.
  • a tap opening 2 is provided, to which a tap channel 3, u. between a so-called «pool gutter».
  • This channel has a metal jacket, which is designed as a sheet metal armor made of steel, a permanent lining 5 and a wear lining 6 thereon.
  • a damming stone 7 extending over the entire clear channel cross section is arranged. This damming stone, which serves to separate pig iron and slag, retains the slag floating on the pig iron and discharges it via the drain opening 8 arranged in a channel side wall above the damming stone 7 into the slag channel, not shown in the figures.
  • the pig iron flows through the gap 9 between the dam 7 and the channel bottom. Below the dam 7, the channel bottom is raised to level 10 in a weir-like manner. By raising the level of the floor, the pig iron is stowed in the gutter. Via the elevated level 10, the pig iron is diverted into an iron channel, not shown in the figures.
  • the sheet metal armor 4 is connected to the stage construction either via a fixed point 11 in the area of the tap hole 2 (FIG. 1) or a fixed point 12 at the opposite end in the area of the dam stone 7 (FIG. 2).
  • the channel is arranged in the channel bed 13 provided in the casting platform.
  • the sheet metal armor 4 consists of a double-wall welded sheet metal construction, u. between the inner shell 4 'and the outer shell 4 ".
  • the two shells are connected to one another by stiffening ribs 14 arranged in the longitudinal direction.
  • the sheet metal armor 4 is held together at construction-dependent intervals of approx. 700 mm by welded profile frames 15, which in the The region of the upper edge of the channel has laterally projecting parts 15 'The outer ends of the projecting parts 15' are connected to one another by supports 16 running in the longitudinal direction of the channel.
  • Rails 17 are mounted on pedestals 13 'of the channel bed 13 which rise above the stage. Between these rails and treads 18 attached to the lower edge of the carrier 16, the channel 3 is supported on both sides in the region of each profile frame 15 via rollers 19. In order to achieve parallel guidance of the rollers 19, a groove 19 'is screwed into the center of each of the rollers. This groove 19 'engages in a guide bar 20 fastened to the rails 17. At both ends, the guide strips 20 are provided with brake shoe-like elevations to limit the roller path.
  • a cooling medium is passed through the cavity 4 ′′ enclosed by the inner shell 4 ′ and the outer shell 4 ′′ of the sheet metal armor 4, which coolant absorbs and dissipates the amount of heat given off by the channel. Air is preferably used as the cooling medium.
  • a compressed air line 21 When air is used, it is fed to the sheet metal armor 4 by a plurality of fans, not shown in the figures, at least one of which serves as a reserve, via a compressed air line 21.
  • the compressed air line 21 is divided into two sub-lines 21 ', 21 "before the connection to the sheet metal armor 4, which feed a left distribution box 22 and a right distribution box 23 via elastic intermediate elements, not shown. Each of these distribution boxes supplies one channel half with cooling air.
  • stiffening ribs 14 "attached between the inner shell 4 'and the outer shell 4" serve at the same time as air baffles and for dividing the sheet metal armor into segments which are supplied with cooling medium independently of one another.
  • a bottom segment and three wall segments are provided in each runner half, the discharge lines of which are designated 24, 24 'for the bottom segments and 25, 25', 26, 26 ', 27, 27' for the wall segments .
  • the control flaps are designated 28, 29, 30, 31, 32, 33, 34, 35. By adjusting the control flaps, it is possible to distribute the amount of cooling air supplied via the lines 21, 21 ', 21 "and the distribution boxes 22 and 23 as required To achieve the need for the various cooling segments.
  • the control flaps are controlled via temperature measuring points (not shown) arranged in the individual cooling segments.
  • the area around the tap opening 2, namely the chapel 36, is also cooled with the cooling air discharged from the base segments.
  • the advantage of the invention is primarily to be seen in the fact that the sheet metal armor, due to its cooling, expands only to a lesser extent during operation than the refractory lining of the channel, so that the refractory lining of the channel is always under compressive stress. There can therefore be no joints in which pig iron could penetrate.
  • the one-piece construction of the gutter according to the invention is particularly advantageous here.
  • the lining can therefore be relatively thin-walled; Despite their thin walls, their durability is about 5 to 8 times that of a conventional gutter.
  • repair work on the gutter according to the invention is only required after tapping 250,000 to 320,000 tons of pig iron.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Description

Die Erfindung betrifft eine Rinne für eine Metallschmelze, insbesondere Abstichrinne eines Hochofens zur Roheisenerzeugung, mit einem trogförmigen Metallmantel, der mit einer feuerfesten, die Metallschmelze aufnehmenden Auskleidung und mit mindestens einem von einem Kühlmedium durchströmten Hohlraum versehen ist.The invention relates to a channel for a molten metal, in particular a tapping channel of a blast furnace for producing pig iron, with a trough-shaped metal jacket which is provided with a refractory lining which receives the molten metal and with at least one cavity through which a cooling medium flows.

Der Abstich von Roheisen und Schlacke aus einem Hochofen erfolgt in periodischen Abständen. Roheisen und Schlacke müssen dabei getrennt den zum Abtransport aus dem Hochofenbereich bereitgestellten Transportgefäßen zugeführt werden. Die Trennung von Roheisen und Schlacke erfolgt in der Abstichhauptrinne, von der aus die Übergabe in eine eigene Eisen-und eine eigene Schlackenrinne erfolgt.Pig iron and slag are tapped from a blast furnace at regular intervals. Pig iron and slag must be fed separately to the transport containers provided for removal from the blast furnace area. Pig iron and slag are separated in the tapping main channel, from which they are transferred to their own iron and slag channel.

In neuerer Zeit haben sich Abstichrinnen mit großem Querschnitt durchgesetzt, in denen das Roheisen auch zwischen den Abstichen verbleibt. Solche Rinnen ermöglichen längere Standzeiten als die bisher verwendeten, nach jedem Abstich entleerten Rinnen.Tapping channels with a large cross-section have recently become established, in which the pig iron also remains between the tapping. Such channels allow longer service lives than the previously used channels that were emptied after each tapping.

Aufgrund unterschiedlicher Dehnungen zwischen dem Metallmantel und der feuerfesten Ausmauerung kommt es bei Rinnen für Metallschmelzen, insbesondere bei den Rinnen mit großem Querschnitt zur Bildung von Rissen in der feuerfesten Auskleidung. Diese Risse erstrecken sich oft nicht nur durch das Verschleißfutter, mit dem solche Rinnen in der Regel ausgekleidet sind, sondern auch durch das Dauerfutter bis zum Blechpanzer. Solche Risse bilden gefährliche Schwachstellen der Rinne, da es bei Füllung dieser Risse mit flüssigem Roheisen (genannt « Fugenläufer ») zu Roheisendurchbrüchen kommen kann, wenn der Blechpanzer durchgeschmolzen wird. Roheisendurchbrüche verursachen nicht nur erhebliche Schäden an den Rinnen selbst und an der Bühnenkonstruktion, sondern sie vermindern auch die Verfügbarkeit des Ofens. Weiters wird das Bedienungspersonal gefährdet. Der Zeit- und Kostenaufwand für eine Reparatur nach einem durch einen Fugenläufer verursachten Roheisendurchbruch ist erheblich.Due to different expansions between the metal jacket and the refractory lining, cracks for molten metal, in particular the gutters with a large cross-section, form cracks in the refractory lining. These cracks often extend not only through the wear lining with which such channels are usually lined, but also through the permanent lining up to the sheet metal armor. Such cracks form dangerous weak points in the gutter, since when these cracks are filled with molten pig iron (called "joint runner"), pig iron breakthroughs can occur if the sheet metal armor is melted. Pig iron breakthroughs not only cause considerable damage to the channels themselves and to the stage construction, they also reduce the availability of the furnace. The operating personnel is also endangered. The time and cost of a repair after a pig iron breakthrough caused by a joint runner is considerable.

Zur Vermeidung von bis zum Blechpanzer reichenden Fugenläufern ist es bekannt, Rinnen mit extremer Dicke der Ausmauerung zu bauen. Man versucht damit, durch das Temperaturgefälle im Mauerwerk ein Erkalten des in einen Riß eindringenden Roheisens zu bewirken, so daß der Blechpanzer nicht beschädigt wird. Abgesehen davon, daß die Gefahr von Fugenläufern bis zum Blechpanzer durch eine solche Konstruktion nicht gänzlich ausgeschlossen werden kann, bedingt diese Lösung einen sehr hohen Aufwand für die Ausmauerung.In order to avoid joint runs reaching up to the sheet metal armor, it is known to build channels with an extreme thickness of the lining. An attempt is made to cool the pig iron penetrating into a crack through the temperature gradient in the masonry so that the sheet metal armor is not damaged. Apart from the fact that the danger of joint runs up to the sheet metal armor cannot be completely ruled out by such a construction, this solution requires a very high outlay for the lining.

Aus der DE-OS 28 36 123 ist eine Abstichrinne bekannt, die aus mehreren Teilen gefertigt ist, wobei die Seitenwände und der Boden des Blechpanzers aus einzelnen Blechen gebildet sind, die an ihren gegenseitigen Berührungsstellen kraftschlüssig gleitend verbunden sind. Die feuerfeste Auskleidung der Rinnen ist an den Stirnseiten ortsfest in der Bühnenkonstruktion eingespannt. Auch mit einer Rinne dieser Art besteht die Gefahr eines durch einen Fugenläufer bedingten Roheisendurchbruches. Außerdem ist das kraftschlüssige Gleiten der einander berührenden Bleche des Blechpanzers während des Betriebes problematisch.From DE-OS 28 36 123 a tapping channel is known, which is made of several parts, the side walls and the bottom of the sheet metal armor are formed from individual sheets which are non-positively connected at their mutual contact points. The fire-resistant lining of the channels is fixed in place on the front sides of the stage construction. Even with a gutter of this type there is a risk of hot metal breakthrough caused by a joint runner. In addition, the frictional sliding of the contacting sheets of the sheet metal armor during operation is problematic.

Aus der japanischen Offenlegungsschrift 53-39911 ist eine Abstichrinne gemäß der eingangs beschriebenen Art bekannt, durch deren Hohlraum Heißdampf mit einer Temperatur von etwa 300 °C gespült wird. Der Dampf verhindert Temperaturschocks, da der Metallmantel und zumindest ein Teil der dem Metallmantel benachbarten feuerfesten Auskleidung auf einer gegenüber der Umgebungstemperatur erhöhten Temperatur gehalten wird. Mit dieser bekannten Rinne gelingt es zwar, durch Temperaturschocks verursachte Risse zu verhindern, jedoch ist mit dieser bekannten Rinne eine gezielte, die unterschiedlichen heißen Zonen der Rinne berücksichtigende Kühlung nicht erzielbar.From the Japanese laid-open patent publication 53-39911, a tapping channel according to the type described in the introduction is known, through the cavity of which superheated steam is flushed at a temperature of approximately 300 ° C. The steam prevents temperature shocks since the metal jacket and at least part of the refractory lining adjacent to the metal jacket is kept at a temperature which is higher than the ambient temperature. With this known channel it is possible to prevent cracks caused by temperature shocks, but with this known channel it is not possible to achieve targeted cooling which takes into account the different hot zones of the channel.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Rinne der eingangs beschrieben Art zu schaffen, bei der trotz möglicht geringer Wandstärke der feuerfesten Auskleidung Risse und damit Fungenläufer sowie durch sie bewirkte Rinnendurchbrüche vermieden werden. Weiters soll die Rinne eine Verteilung des Kühlmediums entsprechend ihrer Hitzebelastung gestatten.The invention aims at avoiding these disadvantages and difficulties and has as its object to create a gutter of the type described above, in which cracks and thus fungus runners and gutter breakthroughs caused by them are avoided in spite of the wall thickness of the refractory lining being as small as possible. Furthermore, the channel should allow the cooling medium to be distributed according to its heat load.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß innerhalb des Hohlraumes des Metallmantels von einem an einem Ende der Rinne angeordneten Verteilerkasten ausgehende, das Kühlmedium leitende, sich in Längsrichtung der Rinne erstreckende Rippen vorgesehen sind und daß als Kühlmedium Luft vorgesehen ist. Durch die Einstellung eines großen Temperaturgefälles zwischen der Innenseite der feuerfesten Ausmauerung und dem Metallmantel dehnt sich der Metallmantel nur mehr um ein geringeres Maß während des Betriebes als die feuerfeste Ausmauerung der Rinne, so daß die feuerfeste Auskleidung der Rinne stets unter Druckspannung steht. Dadurch können, selbst wenn die Ausmauerung rissig wird, in der Ausmauerung keine Fugen entstehen, in die das Roheisen eindrigen könnte.This object is achieved in that within the cavity of the metal shell from a distribution box arranged at one end of the channel, the cooling medium conducting, extending in the longitudinal direction of the channel ribs are provided and that air is provided as the cooling medium. By setting a large temperature gradient between the inside of the refractory lining and the metal jacket, the metal jacket expands only to a lesser extent during operation than the refractory lining of the channel, so that the refractory lining of the channel is always under compressive stress. As a result, even if the lining becomes cracked, no joints can form in the lining, into which the pig iron could penetrate.

Zweckmäßig ist der Hohlraum des Metallmantels mittels der Rippen in einzelne, voneinander unabhängig mit Kühlmedium versorgte Segmente unterteilt.The cavity of the metal jacket is expediently subdivided by means of the ribs into individual segments which are supplied with cooling medium independently of one another.

Nach einer bevorzugten Ausführungsform sind an einem Ende der Rinne Abführleitungen für das Kühlmedium angeschlossen, in denen Regelventile zur Steuerung des Kühlmediumdurchflusses vorgesehen sind.According to a preferred embodiment, discharge lines for the cooling medium are connected to one end of the channel, in which control valves are provided for controlling the cooling medium flow.

Eine weitere Aufgabe der Erfindung ist darin zu sehen, daß durch die Lagerung der Rinne keine Spannungen in ihr entstehen sollen, die ebenfalls für Fugenläufer verantwortlich sein könnten. Diese Aufgabe wird dadurch gelöst, daß der Metallmantel einerseits mittels eines Festlagers am Fundament in seiner Längsrichtung fixiert ist und andererseits mittels Rollen zur Aufnahme von Längsdehnungen gegenüber dem Fundament verschiebbar gelagert ist.Another object of the invention is therein see that the storage of the gutter should not create any stresses in it that could also be responsible for joint runs. This object is achieved in that the metal jacket is fixed on the one hand in its longitudinal direction by means of a fixed bearing on the foundation and on the other hand is displaceably mounted on the foundation by means of rollers for absorbing longitudinal expansions.

Zweckmäßig ist der Metallmantel in einen Profilrahmen eingesetzt, wobei vorteilhaft der Profilrahmen am oberen Rand des Metallmantels seitlich auskragende Träger aufweist, die gegenüber dem Fundament über Rollen abgestützt sind.The metal jacket is expediently inserted into a profile frame, the profile frame advantageously having laterally projecting supports at the upper edge of the metal jacket, which are supported relative to the foundation by rollers.

Zur Vermeidung von Schrägstellungen einzelner Rollen und eines dadurch bedingten Klemmens derselben sind die Rollen mittels einer peripheren Nut in zwei Rollenkörper geteilt und mittels einer am Fundament angeordneten, in die Nut eingreifenden Führungsleiste geführt.In order to avoid inclined positions of individual rollers and the resulting clamping thereof, the rollers are divided into two roller bodies by means of a peripheral groove and are guided by means of a guide bar arranged on the foundation and engaging in the groove.

Die Erfindung ist nachstehend anhand der Zeichnung an zwei Ausführungsbeispielen näher erläutert, wobei die Figuren 1 und 2 je einen Längsschnitt durch eine Rinne zeigen, wobei einmal (Fig. 1) der Fixpunkt der Rinne im Bereich des Roheisenabstiches und einmal (Fig. 2) der Fixpunkt der Rinne am gegenüberliegenden Ende vorgesehen ist.The invention is explained in more detail below with reference to the drawing using two exemplary embodiments, with FIGS. 1 and 2 each showing a longitudinal section through a groove, one (FIG. 1) the fixed point of the groove in the area of the pig iron tapping and one (FIG. 2) the Fixed point of the gutter is provided at the opposite end.

Figur 3 veranschaulicht in vergrößertem Maßstab einen Schnitt, der nach den Linien 111-111 der Figuren 1 und 2 geführt ist.FIG. 3 illustrates, on an enlarged scale, a section which is taken along lines 111-111 of FIGS. 1 and 2.

Figur 4 ist eine Ansicht in Richtung des Pfeiles IV der Figur. 3 ;Figure 4 is a view in the direction of arrow IV of the figure. 3;

Figur 5 zeigt eine teilweise geschnittene perspektivische Ansicht des Blechpanzers der Rinne.Figure 5 shows a partially sectioned perspective view of the sheet metal armor of the channel.

Im Panzer 1 eines Hochofens zur Roheisenerzeugung ist eine Abstichöffnung 2 vorgesehen, an die sich eine Abstichrinne 3, u. zw. eine sogenannte « Pool-Rinne » anschließt. Diese Rinne weist einen Metallmantel, der als Blechpanzer aus Stahl ausgebildet ist, ein Dauerfutter 5 und auf diesem ein Verschleißfutter 6 auf. In dem in Flußrichtung des Roheisens gesehen unteren Rinnenbereich ist ein sich über den gesamten lichten Rinnenquerschnitt erstreckender Staustein 7 angeordnet. Durch diesen Staustein, der zur Trennung von Roheisen und Schlake dient, wird die auf dem Roheisen schwimmende Schlacke zurückgehalten und über die in einer Rinnenseitenwand oberhalb des Stausteines 7 angeordnete Ablauföffnung 8 in die in den Figuren nicht gezeigte Schlackenrinne abgeleitet. Das Roheisen fließt durch den zwischen Staustein 7 und Rinnenboden befindlichen Spalt 9. Unterhalb des Stausteines 7 ist der Rinnenboden wehrartig auf das Niveau 10 angehoben. Durch diese Anhebung des Niveaus des Bodens wird das Roheisen in der Rinne gestaut. Über das erhöhte Niveau 10 wird das Roheisen in eine in den Figuren nicht gezeigte Eisenrinne abgeleitet.In the tank 1 of a blast furnace for pig iron production, a tap opening 2 is provided, to which a tap channel 3, u. between a so-called «pool gutter». This channel has a metal jacket, which is designed as a sheet metal armor made of steel, a permanent lining 5 and a wear lining 6 thereon. In the lower channel area, seen in the direction of flow of the pig iron, a damming stone 7 extending over the entire clear channel cross section is arranged. This damming stone, which serves to separate pig iron and slag, retains the slag floating on the pig iron and discharges it via the drain opening 8 arranged in a channel side wall above the damming stone 7 into the slag channel, not shown in the figures. The pig iron flows through the gap 9 between the dam 7 and the channel bottom. Below the dam 7, the channel bottom is raised to level 10 in a weir-like manner. By raising the level of the floor, the pig iron is stowed in the gutter. Via the elevated level 10, the pig iron is diverted into an iron channel, not shown in the figures.

Der Blechpanzer 4 ist mit der Bühnenkonstruktion entweder über einen Fixpunkt 11 im Bereich der Abstichöffnung 2 (Fig. 1) oder einen Fixpunkt 12 am gegenüber liegenden Ende im Bereich des Stausteines 7 (Fig. 2) verbunden. Die Rinne ist in dem in der Gießbühne angebrachten Rinnenbett 13 angeordnet. Der Blechpanzer 4 besteht aus einer doppelwandig geschweißten Blechkonstruktion, u. zw. aus der Innenschale 4' und der Außenschale 4". Die beiden Schalen sind durch in Längsrichtung angeordnete Versteifungsrippen 14 miteinender verbunden. An der Außenseite wird der Blechpanzer 4 in konstruktionsabhängigen Abständen von jeweils ca. 700 mm durch geschweißte Profilrahmen 15 zusammengehalten, die im Bereich der Rinnenoberkante seitlich auskragende Teile 15' aufweisen. Die äußeren Enden der auskragenden Teile 15' sind durch in Rinnenlängsrichtung verlaufende Träger 16 miteinander verbunden.The sheet metal armor 4 is connected to the stage construction either via a fixed point 11 in the area of the tap hole 2 (FIG. 1) or a fixed point 12 at the opposite end in the area of the dam stone 7 (FIG. 2). The channel is arranged in the channel bed 13 provided in the casting platform. The sheet metal armor 4 consists of a double-wall welded sheet metal construction, u. between the inner shell 4 'and the outer shell 4 ". The two shells are connected to one another by stiffening ribs 14 arranged in the longitudinal direction. On the outside, the sheet metal armor 4 is held together at construction-dependent intervals of approx. 700 mm by welded profile frames 15, which in the The region of the upper edge of the channel has laterally projecting parts 15 'The outer ends of the projecting parts 15' are connected to one another by supports 16 running in the longitudinal direction of the channel.

Auf über Bühnenflur aufragenden Sockeln 13' des Rinnenbettes 13 sind Schienen 17 angebracht. Zwischen diesen schienen und an der Unterkante der Träger 16 angebrachten Laufflächen 18 ist die Rinne 3 beidseitig im Bereich jedes Profilrahmens 15 über Rollen 19 gelagert. Um eine Parallelführung der Rollen 19 zu erreichen, ist in der Mitte jeder der Rollen eine Nut 19' eingedreht. Diese Nut 19' greift in eine auf den Schienen 17 befestigte Führungsleiste 20 ein. An den beiden Enden sind die Führungsleisten 20 zur Begrenzung des Rollenweges mit bremsschuhartigen Erhebungen versehen.Rails 17 are mounted on pedestals 13 'of the channel bed 13 which rise above the stage. Between these rails and treads 18 attached to the lower edge of the carrier 16, the channel 3 is supported on both sides in the region of each profile frame 15 via rollers 19. In order to achieve parallel guidance of the rollers 19, a groove 19 'is screwed into the center of each of the rollers. This groove 19 'engages in a guide bar 20 fastened to the rails 17. At both ends, the guide strips 20 are provided with brake shoe-like elevations to limit the roller path.

Durch den von der Innenschale 4' und der Außenschale 4" des Blechpanzers 4 eingeschlossenen Hohlraum 4"' wird ein Kühlmedium durchgeleitet, welches die von der Rinne abgegebene Wärmemenge aufnimmt und abführt. Als Kühlmedium wird vorzugsweise Luft verwendet.A cooling medium is passed through the cavity 4 ″ enclosed by the inner shell 4 ′ and the outer shell 4 ″ of the sheet metal armor 4, which coolant absorbs and dissipates the amount of heat given off by the channel. Air is preferably used as the cooling medium.

Bei Verwendung von Luft wird diese dem Blechpanzer 4 durch mehrere in den Figuren nicht gezeigte Ventilatoren, von denen mindestens einer als Reserve dient, über eine Druckluftleitung 21 zugeführt. Die Druckluftleitung 21 ist vor dem Anschluß an den Blechpanzer 4 in zwei Teilleitungen 21', 21" aufgeteilt, die über nicht gezeigte elastische Zwischenglieder einen linken Verteilerkasten 22 und einen rechten Verteilerkasten 23 anspeisen. Jeder dieser Verteilerkästen versorgt eine Rinnenhälfte mit Kühlluft.When air is used, it is fed to the sheet metal armor 4 by a plurality of fans, not shown in the figures, at least one of which serves as a reserve, via a compressed air line 21. The compressed air line 21 is divided into two sub-lines 21 ', 21 "before the connection to the sheet metal armor 4, which feed a left distribution box 22 and a right distribution box 23 via elastic intermediate elements, not shown. Each of these distribution boxes supplies one channel half with cooling air.

Die zwischen der Innenschale 4' und der Außenschale 4" angebrachten Versteifungsrippen 14 dienen gleichzeitig als Luftleitbleche und zur Unterteilung des Blechpanzers in voneinander unabhängig mit Kühlmedium versorgte Segmente.The stiffening ribs 14 "attached between the inner shell 4 'and the outer shell 4" serve at the same time as air baffles and for dividing the sheet metal armor into segments which are supplied with cooling medium independently of one another.

In dem in Fig. 5 gezeigten Beispiel sind in jeder Rinnerhälfte ein Bodensegment und drei Wandsegmente vorgesehen, deren Abführleitungen mit 24, 24' für die Bodensegmente und mit 25, 25', 26, 26', 27, 27' für die Wandsegmente bezeichnet sind. In jeder Abführleitung befindet sich ein als Regelklappe ausgebildetes Regelventil. Die Regelklappen sind mit 28, 29, 30, 31, 32, 33, 34, 35 bezeichnet. Durch Verstellen der Regelklappen ist es möglich, eine Verteilung der über die Leitungen 21, 21', 21" und die Verteilerkästen 22 und 23 zugeführten Kühlluftmenge je nach Bedarf auf die verschiedenen Kühlsegmente zu erzielen. Die Steuerung der Regelklappen erfolgt über nicht dargestellte, in den einzelnen Kühlsegmenten angeordnete Temperaturmeßstellen.In the example shown in FIG. 5, a bottom segment and three wall segments are provided in each runner half, the discharge lines of which are designated 24, 24 'for the bottom segments and 25, 25', 26, 26 ', 27, 27' for the wall segments . There is a control valve designed as a control flap in each discharge line. The control flaps are designated 28, 29, 30, 31, 32, 33, 34, 35. By adjusting the control flaps, it is possible to distribute the amount of cooling air supplied via the lines 21, 21 ', 21 "and the distribution boxes 22 and 23 as required To achieve the need for the various cooling segments. The control flaps are controlled via temperature measuring points (not shown) arranged in the individual cooling segments.

Bei der in Fig. 5 gezeigten Anordnung wird mit der aus den Bodensegmenten abgeführten Kühlluft auch der Bereich um die Abstichöffnung 2, nämlich die Kapelle 36, gekühlt.In the arrangement shown in FIG. 5, the area around the tap opening 2, namely the chapel 36, is also cooled with the cooling air discharged from the base segments.

Die Möglichkeiten der Erfindung sind mit der in Fig. 5 gezeigten Anordnung keineswegs erschöpft, sondern es ergeben sich zahlreiche Variationsmöglichkeiten in der Anordnung und Unterteilung der Kühlsegmente sowie in der Einbeziehung verschiedener zu kühlender Anlagenteile in die erfindungsgemäße Kühlung des Blechpanzers 4. Der Blechpanzer könnte gemäß einer nicht dargestellten Ausführungsform außenseitig mit Halbrohren, d. h. Rohren mit halbem kreisförmigem oder sonstigem Profil, versehen sein, wobei diese Rohre eng benachbart an den Blechpanzer angeschweißt sind. Diese Rohre bilden dann zusammen mit dem Blechpanzer den vom Kühlmedium durchströmten Hohlraum.The possibilities of the invention are by no means exhausted with the arrangement shown in FIG. 5, but there are numerous possible variations in the arrangement and subdivision of the cooling segments as well as in the inclusion of various parts of the system to be cooled in the cooling of the sheet metal armature 4 according to the invention Not shown embodiment on the outside with half tubes, d. H. Pipes with a semi-circular or other profile may be provided, these pipes being welded closely to the sheet metal armor. Together with the sheet metal armor, these tubes then form the cavity through which the cooling medium flows.

Der Vorteil der Erfindung ist vor allem darin zu sehen, daß sich der Blechpanzer infolge seiner Kühlung nur mehr um ein geringeres Maß während des Betriebes dehnt als die feuerfeste Auskleidung der Rinne, so daß die feuerfeste Auskleidung der Rinne stets unter Druckspannung steht. Es können daher keine Fugen entstehen, in die Roheisen eindrigen könnte. Hierbei ist insbesondere die einteilige Bauweise der erfindungsgemäßen Rinne von Vorteil.The advantage of the invention is primarily to be seen in the fact that the sheet metal armor, due to its cooling, expands only to a lesser extent during operation than the refractory lining of the channel, so that the refractory lining of the channel is always under compressive stress. There can therefore be no joints in which pig iron could penetrate. The one-piece construction of the gutter according to the invention is particularly advantageous here.

Die Ausmauerung kann daher relativ dünnwandig gestaltet sein ; ihre Haltbarkeit beträgt trotz ihrer geringen Wandstärke etwa das 5 bis 8-Fache der Haltbarkeit einer herkömmlichen Rinne. Mußte man bisher nach dem Abstich von 40 000 bis 50 000 t Roheisen das Verschlußmauerwerk erneuern, so sind Instandsetzungsarbeiten an der erfindungsgemäßen Rinne lediglich nach dem Abstich von 250 000 bis 320 000 t Roheisen erforderlich.The lining can therefore be relatively thin-walled; Despite their thin walls, their durability is about 5 to 8 times that of a conventional gutter. Up to now, if the lock masonry had to be renewed after tapping 40,000 to 50,000 tons of pig iron, repair work on the gutter according to the invention is only required after tapping 250,000 to 320,000 tons of pig iron.

Claims (7)

1. A spout (3) for a metal melt, in particular a tapping spout of a blast furnace for the production of pig iron, comprising a trough-shaped metal jacket (4) provided with a refractory lining (5, 6) accommodating the metal melt and with at least one cavity (4"') through which a coolant flows, characterised in that, within the cavity of the metal jacket (4), ribs (14) departing from a distribution box (22, 23) arranged on one end of the spout (3), extending in the longitudinal direction of the spout and conducting the coolant are provided, and that air is provided as the coolant.
2. A spout according to claim 1, characterised in that the cavity of the metal jacket (4) is subdivided by the ribs (14) into individual segments independently supplied with coolant.
3. A spout according to claim 1 or 2, characterised in that discharge conduits (24 to 27') for the coolant are connected to one end of the spout (3), in which control valves (28 to 35) for controlling the coolant flow are provided.
4. A spout according to claims 1 to 3, characterised in that the metal jacket (4), on the one hand, is fixed in its longitudinal direction on the base (13, 13') by means of a fixed bearing (11, 12) and, on the other hand, is journalled by means of rollers (19) so as to be displaceable relative to the base to accommodate longitudinal expansions.
5. A spout according to claim 4, characterised in that the metal jacket (4) is inserted in a sectional frame (15, 16).
6. A spout according to claim 5, characterised in that the sectional frame (15, 16), on the upper rim of the metal jacket, comprises laterally cantilevered carriers (15'), which are supported relative to the base via rollers (19).
7. A spout according to claim 6, characterised in that the rollers (19) are divided into two roller bodies by means of a peripheral groove (19') and are guided by means of a guide (20) arranged on the base (13, 13') and engaging in the groove.
EP82890030A 1981-03-04 1982-03-01 Outlet trough for molten metal Expired EP0060239B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0100281A AT370133B (en) 1981-03-04 1981-03-04 GUTTER FOR A METAL MELT
AT1002/81 1981-03-04

Publications (2)

Publication Number Publication Date
EP0060239A1 EP0060239A1 (en) 1982-09-15
EP0060239B1 true EP0060239B1 (en) 1984-07-25

Family

ID=3504681

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Application Number Title Priority Date Filing Date
EP82890030A Expired EP0060239B1 (en) 1981-03-04 1982-03-01 Outlet trough for molten metal

Country Status (7)

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EP (1) EP0060239B1 (en)
JP (1) JPS57158306A (en)
AT (1) AT370133B (en)
CA (1) CA1194695A (en)
DE (1) DE3260426D1 (en)
SU (1) SU1138037A3 (en)
ZA (1) ZA82913B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU84042A1 (en) * 1982-03-26 1983-11-17 Arbed CASTING RIGOLE FOR LIQUID METALS
DE3339135A1 (en) * 1983-10-28 1985-05-09 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH ROLLER GUTTER FOR A SHAFT
NL8803103A (en) * 1988-12-19 1990-07-16 Hoogovens Groep Bv IRON GUT.
NL8901556A (en) * 1989-06-21 1991-01-16 Hoogovens Groep Bv IRON GUT.
US5088695A (en) * 1991-03-05 1992-02-18 Hoogovens Groep Bv Iron runner
NL1003885C2 (en) * 1996-08-27 1998-03-03 Hoogovens Tech Services Gutter for a hot melt and gutter system.
NL1007881C2 (en) * 1997-12-23 1999-06-24 Hoogovens Tech Services Gutter for conducting a flow of liquid metal.
JP5705582B2 (en) * 2011-02-23 2015-04-22 新日鉄住金エンジニアリング株式会社 How to cool firewood and firewood
US9073119B2 (en) 2012-06-14 2015-07-07 Pyrotek Inc. Receptacle for handling molten metal, casting assembly and manufacturing method
CN102827979B (en) * 2012-09-25 2014-07-09 莱芜钢铁集团有限公司 Blast furnace slag trough and sealing structure thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773272A (en) * 1954-07-29 1957-04-24 Kaiser Aluminium Chem Corp Improvements in or relating to molten metal transfer troughs
DE1244213B (en) * 1964-07-11 1967-07-13 Babcock & Wilcox Dampfkessel Slag discharge device for slag refining plants
DE2428590A1 (en) * 1974-06-10 1975-12-18 Hassanzadeh M Reza Dipl Ing Blast furnace slag spout made from water-cooled metal pipe - so layer of solidified slag acts as spout lining
JPS5432193A (en) * 1977-08-17 1979-03-09 Nippon Kokan Kk <Nkk> Molten slag runner for production of hard granulated slag

Also Published As

Publication number Publication date
DE3260426D1 (en) 1984-08-30
JPS6121283B2 (en) 1986-05-26
EP0060239A1 (en) 1982-09-15
SU1138037A3 (en) 1985-01-30
AT370133B (en) 1983-03-10
JPS57158306A (en) 1982-09-30
ZA82913B (en) 1983-01-26
ATA100281A (en) 1982-07-15
CA1194695A (en) 1985-10-08

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