EP0054130A1 - Rotary drum projector for metallurgical slags - Google Patents

Rotary drum projector for metallurgical slags Download PDF

Info

Publication number
EP0054130A1
EP0054130A1 EP81108576A EP81108576A EP0054130A1 EP 0054130 A1 EP0054130 A1 EP 0054130A1 EP 81108576 A EP81108576 A EP 81108576A EP 81108576 A EP81108576 A EP 81108576A EP 0054130 A1 EP0054130 A1 EP 0054130A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal drum
drum according
cooling
chambers
slag
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.)
Granted
Application number
EP81108576A
Other languages
German (de)
French (fr)
Other versions
EP0054130B1 (en
Inventor
Clément Burton
André Kremer
Hubert Stomp
Marc Solvi
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0054130A1 publication Critical patent/EP0054130A1/en
Application granted granted Critical
Publication of EP0054130B1 publication Critical patent/EP0054130B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • C21B2400/056—Drums whereby slag is poured on or in between

Definitions

  • the invention relates to a centrifugal drum for metallurgical slag, in particular for liquid blast furnace slag for producing slag sand or pumice.
  • a known possibility of processing the liquid slag consists in mechanical blow and spin treatment.
  • a system of this type is described in more detail in Belgian Patent No. 847,483.
  • This patent proposes a method and a production plant for foamed slag, in which a mechanical treatment of a metallurgical slag stream is carried out with the aid of a rotating drum, the liquid slag being first subjected to swelling by supplying water. The slag that then falls down onto the drum is torn apart by transverse bars attached to the drum and flung away in an arc.
  • a major problem in systems with centrifugal drums are the downtimes, particularly in the area of the blow bars, with which the drum casing is provided.
  • the drum itself is water-cooled from the inside and the strips may also be provided with cavities for water circulation, this cooling has so far not been able to be carried out specifically and intensely enough to prevent destruction, in particular of the blow bar weld seams, within the shortest possible time.
  • the lifespan of the well-known processing drums of only approx. 10,000 tons of slag.
  • the drum jacket In order to avoid air pockets and circulation congestion in the cooling channels, the drum jacket also had to be provided with openings through which the cooling water can escape in order to be thrown away with the slag.
  • the disadvantage here is that this addition of water, which is indispensable for cooling, also enters the slag treatment process and, as noted above, is not necessarily desirable due to its influence on the quality of the resulting product, at least not in such quantities as for the Cooling the drum are necessary.
  • a centrifugal drum of the type mentioned at the outset characterized in that the outer jacket consists of cooling tubes which run closely together in the axial direction and which on one side has a distribution chamber with a cooling water inlet and on the opposite side has a collector chamber with a Water outlet are connected.
  • blow bars Distributed over the drum circumference, a number of blow bars can furthermore advantageously be provided, which are arranged between the pipes and welded to these and an inner drum jacket, and which are also provided with axial cooling channels for intensive water circulation.
  • the drum is carried by two lateral outer flanges 14, 16, which are firmly connected to two hubs 6, 8. These two hubs are provided with internal, preferably axial bores 10, 12 for the supply or removal of cooling water.
  • the outer flanges 14, 16 are welded to an inner flange 15 and 19 via a cylindrical intermediate piece 13 and 17, respectively, and form with them a distribution chamber 28 and a collector chamber 30 for the cooling water.
  • the drum shell consists of a number of cooling tubes 20, 22 welded to one another in the longitudinal direction, which connect the distributor chamber 28 to the collector chamber.
  • the drum casing is preferably carried by an inner fixed casing 18 which is welded to the inner flanges 15, 19 on both sides.
  • a number of radial blow bars 26 are attached to the drum jacket 24 to intensify the impact and centrifugal effect. These blow bars 26 are also cooled and, as shown in FIG. 2, can consist of approximately rectangular bars with cooling channels 32. ; But you can also as a further development of the invention from individual, e.g. there are three cooling tubes lying one above the other in the radial direction and welded to one another. The cooling channels 32 or the welded-together cooling tubes of the blow bars 26 are also connected to the two chambers 28 and 30.
  • the bores 120, 122 (see FIG. 3) for receiving the cooling tubes 20, 22 in the flanges 15, 19 are preferably radially offset. This prevents the bores 120, 122 form an annular interruption in the flanges.
  • the associated cooling tubes 22 are bent radially on both sides accordingly (see FIG. 1).
  • the flanges 15, 19 also have cutouts 34 (see FIG. 3) for receiving the blow bars 26.
  • FIG. 2 shows how the cooling tubes 20, 22 are welded to one another and to the inner jacket 18, and the strips 26 are welded to this jacket 18 and the cooling tubes 20, 22. It can be seen that the most vulnerable weld seams, that is those between the inner jacket 18 and the strips 26, i.e. the seams 36 are in an intensely cooled area.
  • Driver elements are provided which immediately force the water on entering the chamber 28 through the bore 10 at the same rotational speed as that of the drum.
  • These driver elements can, in a simple manner, as indicated by dashed lines in FIG. 3, consist of radial blades 40 which are welded to the flanges 14 and 15 on both sides. Similar measures can be taken in the collector chamber.
  • the chambers 28, 30 are provided with ventilation plugs 38, 40, in order to remove air pockets, particularly before the drum is started up for the first time, which could impair the cooling water circulation and, if necessary, serve as drain plugs.
  • the proposed centrifugal drum design permits very intensive cooling of the parts at risk, since the entire cooling water throughput takes place specifically at the periphery of the drum. There are no more air pockets in the parts to be cooled and the cooling water is evenly distributed over the drum circumference.
  • the cooling device according to the invention also has a positive influence on the treatment process itself in the sense that the cooling water is no longer thrown out of the drum jacket and thus adversely affects the treatment process of the slag.
  • the slag can, as desired, be cooled by air.

Abstract

Zur Verlängerung der Standzeit der Schleudertrommel besteht der äussere Mantel (24) aus in axialer Richtung verlaufenden, dicht aneinanderliegenden Kühlrohren (20, 22), welche auf der einen Seite durch eine Verteilerkammer (28) mit einem Kühlwassereinlauf und auf der gegenüberliegenden Seite über eine Kollektorkammer (30) mit einem Wasserauslauf in Verbindung stehen. Derartige Schleudertrommeln werden bei der Verarbeitung von flüssiger Hochofenschlacke, insbesondere zur Erzeugung von Schlackensand oder Hüttenbims verwendet.

Figure imgaf001
To extend the service life of the centrifugal drum, the outer jacket (24) consists of cooling tubes (20, 22) which run in the axial direction and lie close together, which on one side through a distribution chamber (28) with a cooling water inlet and on the opposite side via a collector chamber (30) are connected to a water outlet. Centrifugal drums of this type are used in the processing of liquid blast furnace slag, in particular for producing slag sand or pumice.
Figure imgaf001

Description

Die Erfindung betrifft eine Schleudertrommel für metallurgische Schlacke, insbesondere für flüssige Hochofenschlacke zur Erzeugung von Schlackensand oder Hüttenbims.The invention relates to a centrifugal drum for metallurgical slag, in particular for liquid blast furnace slag for producing slag sand or pumice.

Eine bekannte Möglichkeit der Verarbeitung der flüssigen Schlacke besteht in einer mechanischen Schlag-und Schleuderbehandlung. Eine Anlage dieser Art wird im belgischen Patent Nr 847.483 näher beschrieben. In diesem Patent wird ein Verfahren sowie eine Herstellungsanlage für geschäumte Schlacke vorgeschlagen, bei welchem eine mechanische Behandlung eines metallurgischen Schlackenstromes mit Hilfe einer rotierenden Trommel durchgeführt wird, wobei die flüssige Schlacke durch Zufuhr von Wasser zuerst einer Aufquellung unterworfen wird. Der anschliessend auf die Trommel hinunterstürzende Schlackenfall wird durch an der Trommel angebrachte Querleisten zerrissen und bogenförmig weggeschleudert.A known possibility of processing the liquid slag consists in mechanical blow and spin treatment. A system of this type is described in more detail in Belgian Patent No. 847,483. This patent proposes a method and a production plant for foamed slag, in which a mechanical treatment of a metallurgical slag stream is carried out with the aid of a rotating drum, the liquid slag being first subjected to swelling by supplying water. The slag that then falls down onto the drum is torn apart by transverse bars attached to the drum and flung away in an arc.

Man hat vor einiger Zeit herausgefunden, dass die in diesem belgischen Patent Nr 847.483 vorgeschlagene Anlage nicht nur zur Herstellung gequollener Schlacken, dem sogenannten Hüttenbims, verwendet werden kann, sondern gleichfalls für die Herstellung von Schlackensand, wie er in den herkömmlichen Granulieranlagen anfällt. Dieses Verfahren wird im luxemburgischen Patent Nr 77.160 vom 19.4.1977 vorgeschlagen. Die auf diese Weise durchgeführte Herstellung von Schlackensand wird ermöglicht durch Einwirken auf verschiedene Arbeitsparameter, wie etwa Drehgeschwindigkeit der Trommel und zugesetzte Wassermenge. Der Anteil an Schlackensand steigt auf Kosten des Bims, wenn die Drehzahl der Trommel und die in der Quellphase zugesetzten Wassermengen erhöht werden.It was found some time ago that the plant proposed in this Belgian patent No. 847,483 can be used not only for the production of swollen slag, the so-called smelting pumice, but also for the production of slag sand, as is produced in conventional granulating plants. This process is proposed in Luxembourg Patent No. 77,160 dated April 19, 1977. The production of slag sand carried out in this way is made possible by acting on various working parameters, such as the speed of rotation of the drum and the amount of water added. The proportion of slag sand increases at the expense of pumice if the speed of the drum and the amount of water added in the swelling phase are increased.

Diese Anlagen mit rotierender Trommel haben gegenüber denjenigen mit Granuliergruben den grossen Vorteil einer bis zu 90%-igen Wassereinsparung. Als Folge können die Anlagen zur Trennung von Wasser und Schlackensand oder Hüttenbims und auch die Trockenanlagen weniger aufwendig und kostenspielig gehalten werden.These systems with a rotating drum have the great advantage of up to 90% water savings compared to those with granulation pits. As a result, the plants for the separation of water and slag sand or pumice and also the drying plants can be kept less complex and costly.

Ein grosses Problem bei Anlagen mit Schleudertrommeln sind jedoch die Standzeiten, insbesondere im Bereich der Schlagleisten, mit denen der Trommelmantel versehen ist. Die Trommel selbst ist zwar von innen wassergekühlt und die Leisten sind gegebenenfalls auch mit Hohlräumen für eine Wasserzirkulation versehen, jedoch konnte diese Kühlung bisher nicht gezielt und intensiv genug durchgeführt werden, um eine Zerstörung, insbesondere der Schlagleistenschweissnähte, innerhalb kürzester Frist zu verhindern. So entspricht z.B. die Lebensdauer der bekannten Trommeln der Verarbeitung von nur ca 10'000 Tonnen Schlacke.A major problem in systems with centrifugal drums, however, are the downtimes, particularly in the area of the blow bars, with which the drum casing is provided. Although the drum itself is water-cooled from the inside and the strips may also be provided with cavities for water circulation, this cooling has so far not been able to be carried out specifically and intensely enough to prevent destruction, in particular of the blow bar weld seams, within the shortest possible time. For example, the lifespan of the well-known processing drums of only approx. 10,000 tons of slag.

Zur Vermeidung von Lufteinschlüssen und Zirkulationsstaus in den Kühlkanälen musste man ausserdem den Trommelmantel mit Oeffnungen versehen, durch welche das Kühlwasser austreten kann um mit der Schlacke weggeschleudert zu werden. Nachteilig hierbei ist jedoch, dass diese für die Kühlung unentbehrliche Wasserzugabe ebenfalls in den Aufbereitungsprozess der Schlacke gelangt und dort, wie oben bereits vermerkt, infolge seines Einflusses auf die Qualität des anfallenden Produktes nicht unbedingt erwünscht ist, jedenfalls nicht in solchen Mengen wie sie für die Kühlung der Trommel notwendig sind.In order to avoid air pockets and circulation congestion in the cooling channels, the drum jacket also had to be provided with openings through which the cooling water can escape in order to be thrown away with the slag. The disadvantage here, however, is that this addition of water, which is indispensable for cooling, also enters the slag treatment process and, as noted above, is not necessarily desirable due to its influence on the quality of the resulting product, at least not in such quantities as for the Cooling the drum are necessary.

Zur Vermeidung dieser Nachteile beim gegenwärtigen Stand der Technik ist es Aufgabe der Erfindung, eine Schleudertrommel für metallurgische Schlacke vorzuschlagen, bei welcher der Trommelmantel und die Schlagleisten in intensivster Weise von innen und ohne Wasseraustritt aus dem Trommelmantel gekühlt werden und damit ihre Lebensdauer entsprechend verlängert wird.To avoid these disadvantages in the current state of the art, it is the object of the invention to propose a centrifugal drum for metallurgical slag, in which the drum casing and blow bars are cooled in the most intensive manner from the inside and without water escaping from the drum casing, and their service life is accordingly extended.

Diese Aufgabe wird gelöst durch eine Schleudertrommel der eingangs erwähnten Art, dadurch gekennzeichnet dass der äussere Mantel aus in axialer Richtung verlaufenden, dicht aneinanderliegenden Kühlrohren besteht, welche auf der einen Seite durch eine Verteilerkammer mit einem Kühlwassereinlauf und auf der gegenüberliegenden Seite über eine Kollektorkammer mit einem Wasserauslauf in Verbindung stehen.This object is achieved by a centrifugal drum of the type mentioned at the outset, characterized in that the outer jacket consists of cooling tubes which run closely together in the axial direction and which on one side has a distribution chamber with a cooling water inlet and on the opposite side has a collector chamber with a Water outlet are connected.

Ueber den Trommelumfang verteilt kann desweiteren vorteilhafterweise eine Anzahl Schlagleisten vorgesehen werden, welche zwischen den Rohren angeordnet und mit diesen und einem inneren Trommelmantel verschweisst sind, und welche ebenfalls mit axialen Kühlkanälen für eine intensive Wasserzirkulation versehen sind.Distributed over the drum circumference, a number of blow bars can furthermore advantageously be provided, which are arranged between the pipes and welded to these and an inner drum jacket, and which are also provided with axial cooling channels for intensive water circulation.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen, in welchen gleiche Teile mit den gleichen Bezugsnummern versehen sind, dargestellt und werden im folgenden näher beschrieben. Es zeigen:

  • Figur 1, einen Längsschnitt durch eine Schleudertrommel der vorgeschlagenen Bauart;
  • Figur 2, einen Querschnitt durch die Trommel nach Figur 1;
  • Figur 3, eine Seitenansicht in Richtung X eines Wasserzuführungsflansches an der Trommel nach Figur 1.
An embodiment of the invention is shown in the drawings, in which the same parts are provided with the same reference numbers, and are described in more detail below. Show it:
  • Figure 1, a longitudinal section through a centrifugal drum of the proposed type;
  • Figure 2 shows a cross section through the drum of Figure 1;
  • FIG. 3 shows a side view in the direction X of a water supply flange on the drum according to FIG. 1.

Die global mit 4 bezeichnete Trommel wird von zwei seitlichen äusseren Flanschen 14, 16, welche fest mit zwei Naben 6, 8 verbunden sind getragen. Diese beiden Naben sind für-die Zufuhr bzw. Abfuhr von Kühlwasser mit inneren, vorzugsweise axialen Bohrungen 10, 12 versehen. Die äusseren Flansche 14, 16 sind über ein zylindrisches Zwischenstück 13 bzw. 17 jeweils mit einem inneren Flansch 15 bzw. 19 verschweisst und bilden mit diesen eine Verteilerkammer 28 bzw. eine Kollektorkammer 30 für das Kühlwasser.The drum, generally designated 4, is carried by two lateral outer flanges 14, 16, which are firmly connected to two hubs 6, 8. These two hubs are provided with internal, preferably axial bores 10, 12 for the supply or removal of cooling water. The outer flanges 14, 16 are welded to an inner flange 15 and 19 via a cylindrical intermediate piece 13 and 17, respectively, and form with them a distribution chamber 28 and a collector chamber 30 for the cooling water.

Der Trommelmantel besteht aus einer Anzahl in Längsrichtung miteinander verschweissten Kühlrohren 20, 22, welche die Verteilerkammer 28 mit der Kollektorkammer verbinden. Zur Verstärkung der Trommel wird der Trommelmantel vorzugsweise durch einen inneren festen Mantel 18 welcher beidseitig mit den inneren Flanschen 15, 19 verschweisst ist, getragen.The drum shell consists of a number of cooling tubes 20, 22 welded to one another in the longitudinal direction, which connect the distributor chamber 28 to the collector chamber. To reinforce the drum, the drum casing is preferably carried by an inner fixed casing 18 which is welded to the inner flanges 15, 19 on both sides.

Zur Intensivierung der Schlag- und Schleuderwirkung sind eine Anzahl radiale Schlagleisten 26 am Trommelmantel 24 angebracht. Diese Schlagleisten 26 sind ebenfalls gekühlt und können, wie in Figur 2 gezeigt ist aus etwa rechteckigen Stäben mit Kühlkanälen 32 bestehen. ; Sie können aber auch als Weiterbildung der Erfindung aus einzelnen, z.B. drei, in radialer Richtung übereinanderliegenden und miteinander verschweissten Kühlrohren bestehen. Die Kühlkanäle 32 oder die miteinander verschweissten Kühlrohre der Schlagleisten 26 sind ebenfalls mit den beiden Kammern 28 und 30 verbunden.A number of radial blow bars 26 are attached to the drum jacket 24 to intensify the impact and centrifugal effect. These blow bars 26 are also cooled and, as shown in FIG. 2, can consist of approximately rectangular bars with cooling channels 32. ; But you can also as a further development of the invention from individual, e.g. there are three cooling tubes lying one above the other in the radial direction and welded to one another. The cooling channels 32 or the welded-together cooling tubes of the blow bars 26 are also connected to the two chambers 28 and 30.

Die Bohrungen 120, 122 (siehe Figur 3) zur Aufnahme der Kühlrohre 20, 22 in den Flanschen 15, 19 sind vorzugsweise radial versetzt. Damit wird verhindert, dass die Bohrungen 120, 122 eine ringförmige Unterbrechung in den Flanschen bilden. Die zugehörigen Kühlrohre 22 sind beidseitig entsprechend radial abgebogen (siehe Figur 1).The bores 120, 122 (see FIG. 3) for receiving the cooling tubes 20, 22 in the flanges 15, 19 are preferably radially offset. This prevents the bores 120, 122 form an annular interruption in the flanges. The associated cooling tubes 22 are bent radially on both sides accordingly (see FIG. 1).

Die Flansche 15, 19 besitzen ebenfalls Aussparungen 34 (siehe Figur 3) zur Aufnahme der Schlagleisten 26.The flanges 15, 19 also have cutouts 34 (see FIG. 3) for receiving the blow bars 26.

Aus Figur 2 geht hervor, wie die Kühlrohre 20, 22 untereinander und mit dem inneren Mantel 18, und die Leisten 26 mit diesem Mantel 18 und den Kühlrohren 20, 22 verschweisst sind. Man erkennt, dass die am meisten gefährdeten Schweissnähte, das sind diejenigen zwischen innerem Mantel 18 und den Leisten 26, d.h. die Nähte 36, in einem intensiv gekühlten Bereich liegen.FIG. 2 shows how the cooling tubes 20, 22 are welded to one another and to the inner jacket 18, and the strips 26 are welded to this jacket 18 and the cooling tubes 20, 22. It can be seen that the most vulnerable weld seams, that is those between the inner jacket 18 and the strips 26, i.e. the seams 36 are in an intensely cooled area.

Um zu verhindern, dass auf der Eintrittsseite des Kühlwassers, infolge der Trägheit, in der Kammer 28 ein stehender oder langsamer als die Trommel drehender "Wasserflansch" entsteht, welcher die Strömung in .die Kühlrohre 20, 22 behindern würde, sind in der Kammer 28 Mitnehmerelemente vorgesehen, welche dem Wasser beim Eintritt durch die Bohrung 10 in die Kammer 28 sofort dieselbe Drehgeschwindigkeit wie diejenige der Trommel aufzwingen. Diese Mitnehmerelemente können in einfacher Weise, wie in Figur 3 gestrichelt angedeutet, aus radialen Schaufeln 40 bestehen, welche beidseitig mit den Flanschen 14 und 15 verschweisst sind. In der Kollektorkammer können ähnliche Massnahmen getroffen werden.In order to prevent that on the inlet side of the cooling water, due to the inertia, a standing or slower rotating "water flange" occurs in the chamber 28, which would hinder the flow into the cooling pipes 20, 22, are in the chamber 28 Driver elements are provided which immediately force the water on entering the chamber 28 through the bore 10 at the same rotational speed as that of the drum. These driver elements can, in a simple manner, as indicated by dashed lines in FIG. 3, consist of radial blades 40 which are welded to the flanges 14 and 15 on both sides. Similar measures can be taken in the collector chamber.

Anstatt das Wasser durch die Nabe 8 abzuleiten ist es auch möglich die Kammer 30 über eine axiale Leitung mit der Nabe 6 zu verbinden. Letztere würde dann die Zuflussleitung und eine konzentrisch dazu angeordnete Abflussleitung enthalten.Instead of draining the water through the hub 8, it is also possible to connect the chamber 30 to the hub 6 via an axial line. The latter would then contain the inflow line and an outflow line arranged concentrically to it.

1 Die Kammern 28, 30 sind mit Entlüftungsstopfen 38, 40 versehen, um insbesondere vor der ersten Inbetriebnahme der Trommel Lufteinschlüsse zu beseitigen, welche die Kühlwasserzirkulation beeinträchtigen könnten und gegebenenfalls als Entleerungsstopfen dienen können.1 The chambers 28, 30 are provided with ventilation plugs 38, 40, in order to remove air pockets, particularly before the drum is started up for the first time, which could impair the cooling water circulation and, if necessary, serve as drain plugs.

Die vorgeschlagene Schleudertrommelbauart erlaubt eine sehr intensive Kühlung der gefährdeten Teile, da der gesamte Kühlwasserdurchsatz gezielt an der Peripherie der Trommel erfolgt. Es entstehen keine Lufteinschlüsse mehr in den zu kühlenden Teilen und das Kühlwasser wird gleichmässig über den Trommelumfang verteilt.The proposed centrifugal drum design permits very intensive cooling of the parts at risk, since the entire cooling water throughput takes place specifically at the periphery of the drum. There are no more air pockets in the parts to be cooled and the cooling water is evenly distributed over the drum circumference.

Die erfindungsgemässe Kühlvorrichtung hat ausserdem einen positiven Einfluss auf den Behandlungsprozess selbst in dem Sinne, dass das Kühlwasser nicht mehr aus dem Trommelmantel herausgeschleudert wird und so den Aufbereitungsprozess der Schlacke nachteilig beeinflusst. Die Abkühlung der Schlacke kann also, wie angestrebt, durch Luft erfolgen.The cooling device according to the invention also has a positive influence on the treatment process itself in the sense that the cooling water is no longer thrown out of the drum jacket and thus adversely affects the treatment process of the slag. The slag can, as desired, be cooled by air.

Claims (9)

1. Schleudertrommel für metallurgische Schlacke, insbesondere flüssige Hochofenschlacke, zur Erzeugung von Schlackensand oder Hüttenbims, dadurch gekennzeichnet, dass der äussere Mantel (24), aus in axialer Richtung verlaufenden, dicht aneinanderliegenden Kühlrohren (20, 22) besteht, welche auf der einen Seite durch eine Verteilerkammer (28) mit einem Kühlwassereinlauf und auf der gegenüberliegenden Seite über eine Kollektorkammer (30) mit einem Wasserauslauf in Verbindung stehen.1. centrifugal drum for metallurgical slag, in particular liquid blast furnace slag, for the production of slag sand or metallurgical pumice, characterized in that the outer jacket (24) consists of cooling tubes (20, 22) which run in the axial direction and lie close together, which is on one side through a distribution chamber (28) with a cooling water inlet and on the opposite side via a collector chamber (30) with a water outlet in connection. 2. Schleudertrommel nach Anspruch 1, dadurch gekennzeichnet, dass der äussere Mantel (24) von einem inneren Mantel (18) abgestutzt ist.2. centrifugal drum according to claim 1, characterized in that the outer casing (24) is supported by an inner casing (18). 3. Schleudertrommel nach Anspruch 1, dadurch gekennzeichnet, dass die Kühlrohre (20, 22) untereinander und mit dem inneren Mantel (18) in Längsrichtung verschweisst sind.3. centrifugal drum according to claim 1, characterized in that the cooling tubes (20, 22) are welded to one another and to the inner jacket (18) in the longitudinal direction. 4. Schleudertrommel nach einem der Ansprüche 1 bis 2, gekennzeichnet durch eine Anzahl, über den Trommelumfang verteilte, gekühlte Schlagleisten (26), welche an die Kammern (28) (30) angeschlossen sind.4. centrifugal drum according to one of claims 1 to 2, characterized by a number, distributed over the drum circumference, cooled blow bars (26) which are connected to the chambers (28) (30). 5. Schleudertrommel nach Ansspruch 1, dadurch gekennzeichnet, dass die Verteilerkammer (28) mit Mitnehmerelementen ausgerüstet ist.5. centrifugal drum according to claim 1, characterized in that the distribution chamber (28) is equipped with driver elements. 6. Schleudertrommel nach Anspruch 1 oder 5, dadurch gekennzeichnet, dass die Kollektorkammer (30) ebenfalls mit Mitnehmerelementen ausgerüstet ist.6. centrifugal drum according to claim 1 or 5, characterized in that the collector chamber (30) is also equipped with driver elements. 7. Schleudertrommel nach den Ansprüchen 1 bis 6, gekennzeichnet durch radial versetzte Rohranschlüsse (120, 122) an den Kammern (28, 30) für gerade Kühlrohre (20) und gekröpfte Kühlrohre (22).7. centrifugal drum according to claims 1 to 6, characterized by radially offset pipe connections (120, 122) on the chambers (28, 30) for straight cooling tubes (20) and cranked cooling tubes (22). 8. Schleudertrommel nach den Ansprüchen 1 bis 7, gekennzeichnet durch Aussparungen (34) an den Kammern (28, 30) zur Aufnahme und Befestigung der Schlagleisten (26) und zur hydraulischen Verbindung deren Kühlleitungen mit dem Innern der Kammern (28, 30).8. centrifugal drum according to claims 1 to 7, characterized by recesses (34) on the chambers (28, 30) for receiving and fastening the blow bars (26) and for the hydraulic connection of their cooling lines to the interior of the chambers (28, 30). 9. Schleudertrommel nach den Ansprüchen 1 bis 8, gekennzeichnet durch Entlüftungsstopfen (38, 40) am Umfang der Kammern (28, 30).9. centrifugal drum according to claims 1 to 8, characterized by ventilation plugs (38, 40) on the circumference of the chambers (28, 30).
EP81108576A 1980-12-12 1981-10-20 Rotary drum projector for metallurgical slags Expired EP0054130B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU83000A LU83000A1 (en) 1980-12-12 1980-12-12 SLINGER DRUM FOR METALLURGICAL SLAG
LU83000 1980-12-12

Publications (2)

Publication Number Publication Date
EP0054130A1 true EP0054130A1 (en) 1982-06-23
EP0054130B1 EP0054130B1 (en) 1985-01-16

Family

ID=19729544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108576A Expired EP0054130B1 (en) 1980-12-12 1981-10-20 Rotary drum projector for metallurgical slags

Country Status (5)

Country Link
US (1) US4492342A (en)
EP (1) EP0054130B1 (en)
CA (1) CA1177646A (en)
DE (1) DE3168375D1 (en)
LU (1) LU83000A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110093463A (en) * 2019-05-31 2019-08-06 安徽中巨机电设备有限公司 A kind of steel slag recovery and processing system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113877697B (en) * 2021-10-12 2023-02-24 东北大学 Melt impact crushing and granulating system and method

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229560C (en) *
DE257089C (en) * 1900-01-01
CH35751A (en) * 1906-02-23 1906-10-15 Colloseus Dr Heinrich Apparatus for atomizing molten blast furnace slag
US3310391A (en) * 1962-08-31 1967-03-21 Flex O Lite Mfg Corp Method of and apparatus for production of glass beads by use of a rotating wheel
DE1927196A1 (en) * 1968-06-05 1969-12-11 Nat Slag Ltd Method and device for pelletizing, in particular of blast furnace slag
BE847483A (en) * 1975-10-21 1977-02-14 EXPANDED DAIRY MANUFACTURING PROCESS,
AT337222B (en) * 1973-01-12 1977-06-27 Nat Slag Ltd DEVICE FOR PELLETIZING MOLTEN MATERIAL, IN PARTICULAR BOTTOM FURNACE SLAG
US4050884A (en) * 1976-03-04 1977-09-27 Richard Jablin Slag waste heat boiler
JPS53100990A (en) * 1977-02-15 1978-09-02 Ishikawajima Harima Heavy Ind Co Ltd Inner wall cooling apparatus for rotary drum
LU77160A1 (en) * 1977-04-19 1979-01-18
FR2406377A7 (en) * 1977-10-13 1979-05-11 Nakayama Steel Works Ltd PROCESS AND INSTALLATION FOR THE MANUFACTURING OF CRUSHED SAND FROM WATER-TREATED HIGH RANGE SLAGS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE35751C (en) * J. GOTTLOB und J. MAUS in Köln, vor den Siebenburgen Nr. 3 Cooling device with spiral-shaped gutter pan
DE337222C (en) * 1920-04-28 1921-05-27 Erich Tschimpke Flashlight and hand lamp battery
US2792042A (en) * 1956-02-14 1957-05-14 Richard M Dwyer Meat grinders
JPS5113087B1 (en) * 1971-07-12 1976-04-24
CH566167A5 (en) * 1973-09-28 1975-09-15 Bicik Vladislav

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229560C (en) *
DE257089C (en) * 1900-01-01
CH35751A (en) * 1906-02-23 1906-10-15 Colloseus Dr Heinrich Apparatus for atomizing molten blast furnace slag
US3310391A (en) * 1962-08-31 1967-03-21 Flex O Lite Mfg Corp Method of and apparatus for production of glass beads by use of a rotating wheel
DE1927196A1 (en) * 1968-06-05 1969-12-11 Nat Slag Ltd Method and device for pelletizing, in particular of blast furnace slag
AT337222B (en) * 1973-01-12 1977-06-27 Nat Slag Ltd DEVICE FOR PELLETIZING MOLTEN MATERIAL, IN PARTICULAR BOTTOM FURNACE SLAG
DE2554087A1 (en) * 1975-10-21 1977-04-28 Arbed PROCESS FOR MANUFACTURING FOAMED SLAG
BE847483A (en) * 1975-10-21 1977-02-14 EXPANDED DAIRY MANUFACTURING PROCESS,
US4050884A (en) * 1976-03-04 1977-09-27 Richard Jablin Slag waste heat boiler
JPS53100990A (en) * 1977-02-15 1978-09-02 Ishikawajima Harima Heavy Ind Co Ltd Inner wall cooling apparatus for rotary drum
LU77160A1 (en) * 1977-04-19 1979-01-18
US4171965A (en) * 1977-04-19 1979-10-23 Arbed - Acieries Reunies De Burbach-Eich-Dudelange S.A. Method of making granulated slag
FR2406377A7 (en) * 1977-10-13 1979-05-11 Nakayama Steel Works Ltd PROCESS AND INSTALLATION FOR THE MANUFACTURING OF CRUSHED SAND FROM WATER-TREATED HIGH RANGE SLAGS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN Band 2, Nr. 136, 11. November 1978 seite 2910C78 & JP - A - 53 - 100990 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110093463A (en) * 2019-05-31 2019-08-06 安徽中巨机电设备有限公司 A kind of steel slag recovery and processing system

Also Published As

Publication number Publication date
LU83000A1 (en) 1982-07-07
US4492342A (en) 1985-01-08
CA1177646A (en) 1984-11-13
EP0054130B1 (en) 1985-01-16
DE3168375D1 (en) 1985-02-28

Similar Documents

Publication Publication Date Title
DE3047013C2 (en) Dispersing device for the processing of waste paper
US5116473A (en) Apparatus for controlling solid particle flow in an evaporator
DE1458198B1 (en) Cooling device on a casting wheel for continuous casting of metals and method for operating the cooling device
EP0093203B1 (en) Installation for the removal of solid impurities from cooling water for power stations, etc.
DE4412408C2 (en) agitating mill
CH666955A5 (en) HEAT EXCHANGER.
EP0054130B1 (en) Rotary drum projector for metallurgical slags
DE2217612A1 (en) Filters for removing particles and aerosol from air and other gases
DE3339974C2 (en) Device for removing foreign matter from condenser cooling water
DE3202596A1 (en) DEVICE FOR PRODUCING A FAST-COOLED, FROSTED SLAG
AU610976B2 (en) Apparatus for controlling solid particle flow in an evaporator
LU83248A1 (en) SLINGER DRUM FOR METALLURGICAL SLAG
DE1284400B (en) Device for circulating and ventilating a liquid
DE2909647A1 (en) METHOD AND DEVICE FOR THE RECOVERY OF ENERGY FROM BURN GAS
DE4434650C1 (en) Device for wet cleaning and separating mixtures of soil and organic material
DE2400496A1 (en) PERIODIC FAN
DE1517904A1 (en) Method and device for separating solids from sludge
AT407720B (en) CASTING ROLLER FOR CONTINUOUS CASTING WITH COUNTERFLOWING ROLLERS FOR THIN THICKNESSES
DE3612919C1 (en) Solid bowl screw centrifuge with a centrifuge drum equipped with solids discharge openings
DE2208549B2 (en) Method and device for cleaning and fractionating material suspensions
DE3114261C2 (en) Countercurrent extraction centrifuge for mixing and separating liquids
DE3332613C2 (en)
AT404679B (en) DEVICE FOR PRODUCING GRANULATE
DE466753C (en) Device for separating suspended particles from a flowing medium
AT220178B (en) Apparatus for treating molten metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19820713

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 3168375

Country of ref document: DE

Date of ref document: 19850228

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960918

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960919

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961010

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19961011

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19961029

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971031

BERE Be: lapsed

Owner name: PAUL WURTH S.A.

Effective date: 19971031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971020

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST