EP0039035A1 - Device for removing a fluid layer from a bath - Google Patents

Device for removing a fluid layer from a bath Download PDF

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Publication number
EP0039035A1
EP0039035A1 EP81102994A EP81102994A EP0039035A1 EP 0039035 A1 EP0039035 A1 EP 0039035A1 EP 81102994 A EP81102994 A EP 81102994A EP 81102994 A EP81102994 A EP 81102994A EP 0039035 A1 EP0039035 A1 EP 0039035A1
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EP
European Patent Office
Prior art keywords
fluid layer
conveyor
screw conveyor
bath
housing
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Granted
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EP81102994A
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German (de)
French (fr)
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EP0039035B1 (en
Inventor
Peter Dipl.-Ing. Klotz
Henry Böttcher
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Metaleurop Weser Blei GmbH
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Preussag Boliden Blei GmbH
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Publication of EP0039035A1 publication Critical patent/EP0039035A1/en
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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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt

Definitions

  • the invention relates to a method and an apparatus for removing a fluid layer located on a bath, in particular a reaction product layer of pyrometallurgical refining of lead.
  • reaction products In numerous processes, reactions with specifically lighter reaction products than in the bath take place in a bath, for example a melt or an electrolyte. Such reaction products collect in a fluid layer from a liquid, pasty or powdery mass on the bath surface and must be removed from time to time or continuously.
  • the pyrometallurgical refining of lead in the melting vessel produces a wide variety of reaction and intermediate products, for example solid lead copper mixed crystals for coarse decoupling through Seigers and copper extraction, mainly from copper and lead sulfide, with fine decoupling using sulfur, tin smear when decinning using selective oxidation or atmospheric oxygen chlorine-containing reaction products, arsenic swab or scabies when deharseising and antimony swab when dehumidifying using caustic soda and saltpetre.
  • reaction and intermediate products for example solid lead copper mixed crystals for coarse decoupling through Seigers and copper extraction, mainly from copper and lead sulfide, with fine decoupling using sulfur, tin smear when decinning using selective oxidation or atmospheric oxygen chlorine-containing reaction products, arsenic swab or scabies when deharseising and antimony swab when dehumidifying using caustic soda and saltpetre.
  • reaction products are mostly more or less heavily interspersed with lead droplets and must be carefully removed from the bath surface. According to previous practice, this is done with the aid of rake-like drawing sticks or by means of perforated trowels which allow the lead contained in the reaction products to drip off and which are intended to keep the lead losses low.
  • pneumatic deslagging devices in metallurgical multi-slag processes to remove a slag as far as possible before adding new slag formers.
  • These usually consist of a tube with a T-piece at one end of the tube.
  • the T-piece is provided with a row of holes on the underside, through which compressed air emerges and drives the slag towards the converter mouth.
  • Such a device is at best suitable for removing liquid and in particular non-toxic reaction products; for example, it is for Ent Removing the reaction products from lead refining is not suitable, if only because of the associated high dust accumulation and the generation of toxic vapors.
  • the invention is therefore based on the object of providing a method and a device for removing fluid reaction or intermediate products which not only work reliably but also in a particularly environmentally friendly manner and are associated with low losses of valuable materials.
  • the solution to this problem is that, in a method of the type mentioned at the outset, the fluid layer or the fluid reaction products are driven into the receiving part of a stationary removal conveyor. This can be done mechanically, pneumatically or electromagnetically.
  • the use of the agitator which is present anyway, for concentration compensation in the melt and, in the case of selective oxidation, the use of the oxidizing air to drive the fluid reaction products into the receiving part of the conveyor.
  • the fluid reaction products can be removed with the aid of a conveyor protruding into the fluid layer, preferably a screw conveyor.
  • the melting vessel can be provided with an agitator and / or a cover.
  • the hood and / or the conveyor housing are preferably connected to a suction device.
  • the screw conveyor can have a closed housing or a trough, each with an inlet and an outlet opening in the housing or trough bottom. It is preferably adjustable in height arranges in order to be able to change the immersion depth of the receiving part or the screw conveyor in the fluid layer.
  • the screw conveyor and the housing or the trough of the screw conveyor can be conical.
  • the housing or trough bottom is designed in two stages with an inclined transition and the screw conveyor consists of a large diameter stage, a transition stage and a small diameter stage.
  • the discharge conveyor can also be provided with a heating device which allows any build-up to melt or prevent build-up from the outset.
  • the screw conveyor can also be arranged to be movable so that it can be guided over the surface of the bath. In this case, it is not absolutely necessary to drive the fluid reaction products into the receiving part of the conveyor.
  • a heated melting tank 1 there is a working lead melt 2 with a fluid layer 3 consisting of fluid reaction or intermediate products.
  • the melting tank 1 is covered with a hood 4, from which a suction nozzle 5 leads to gas cleaning (not shown).
  • the cover 4 is provided with a cross member 6, in which an agitator 8, driven by a motor 7 and changeable in its direction of rotation, is mounted with an agitator shaft 9 and agitator blades 10.
  • the agitator 8 extends through a traverse or hood opening 11 through which the boiler 1 can also be emptied by means of a metal pump.
  • a screw conveyor 12 projects through the covering hood 4 and dips slightly into the fluid layer 3 on the underside; it consists of a housing 13 and a stepped bottom or trough.
  • the bottom consists of a lower step 14 immersing in the fluid layer 3, a transition 15 and an upper step 16 lying outside the refining vessel 1 , below which a transport vessel 19 for the removed reaction products is arranged.
  • the screw conveyor 12 is arranged on lifting rams 20 so as to be adjustable in height in order to be able to change the immersion depth of the lower housing stage 14 and to keep the lead losses low by careful adjustment.
  • a shaft 23 mounted in two roller bearings 21, 22 is driven by a motor 24 via a chain drive 25 and carries a belt-shaped screw conveyor 26 with a large diameter stage 27, a transition stage 28 and a small diameter stage 29.
  • the fluid layer 3 is driven in the direction of the inlet opening 17 of the screw conveyor 12. Since the inlet opening 17 of the screw conveyor 12 lies in the fluid layer, the windings of the large diameter stage 27 move the reaction products of the fluid layer 3 from the region of the inlet opening via the housing or trough bottom 14, 15 and 16 in the direction of the discharge opening 18 Reaction products are lifted over the edge of the vessel and reach the transport vessel 19 intermittently or continuously. In this way, the fluid reaction products can be removed from the bath surface practically automatically without any strain on the operating personnel and without the risk of increased lead oxidation due to additional false air. To the extent that toxic gases and vapors are produced, they are sucked off via the suction nozzle 5 and finally separated.

Abstract

Verfahren zum Entfernen einer auf einen Bad befindlichen Fluidschicht insbesondere einer Reaktionsproduktschicht der pyrometallurgischen Werkbleiraffination, bei dem die Fluidschicht (3) in den Aufnahmeteil eines ortsfesten Abförderers (12) getrieben wird.Method for removing a fluid layer located on a bath, in particular a reaction product layer of pyrometallurgical lead refining, in which the fluid layer (3) is driven into the receiving part of a stationary removal conveyor (12).

Description

"Verfahren und Vorrichtung zum Entfernen einer auf einem Bad befindlichen Fluidschicht""Method and device for removing a fluid layer on a bath"

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Entfernen einer auf einem Bad befindlichen Fluidschicht, insbesondere einer Reaktionsproduktschicht der pyrometallurgischen Werkbleiraffination.The invention relates to a method and an apparatus for removing a fluid layer located on a bath, in particular a reaction product layer of pyrometallurgical refining of lead.

Bei zahlreichen Verfahren finden in einem Bad, beispielsweise einer Schmelze oder einem Elektrolyten, Reaktionen mit im Vergleich zum Bad spezifisch leichteren Reaktionsprodukten statt. Derartige Reaktionsprodukte sammeln sich in einer Fluidschicht aus einer flüssigen,pastösen oder pulverförmigen Masse auf der Badoberfläche und müssen von Zeit zu Zeit oder auch kontinuierlich entfernt werden. So entstehen bei der pyrometallurgischen Raffination von Werkblei im Schmelzkessel die verschiedensten Reaktions- bzw. Zwischenprodukte, beispielsweise feste Bleikupfermischkristalle beim Grobentkupfern durch Seigern und Kupferabhub, im wesentlichen aus Kupfer- und Bleisulfid, beim Feinentkupfern mittels Schwefel, Zinnabstrich beim Entzinnen durch selektive Oxydation mittels Luftsauerstoffs oder chlorhaltiger Reaktionsprodukte, Arsenabstrich bzw. -krätze beim Entarsenieren und Antimonabstrich beim Entantimonieren mittels Ätznatron und Salpeter.In numerous processes, reactions with specifically lighter reaction products than in the bath take place in a bath, for example a melt or an electrolyte. Such reaction products collect in a fluid layer from a liquid, pasty or powdery mass on the bath surface and must be removed from time to time or continuously. The pyrometallurgical refining of lead in the melting vessel produces a wide variety of reaction and intermediate products, for example solid lead copper mixed crystals for coarse decoupling through Seigers and copper extraction, mainly from copper and lead sulfide, with fine decoupling using sulfur, tin smear when decinning using selective oxidation or atmospheric oxygen chlorine-containing reaction products, arsenic swab or scabies when deharseising and antimony swab when dehumidifying using caustic soda and saltpetre.

Die pulverförmigen oder flüssigen, in jedem Falle fluiden Reaktionsprodukte sind zumeist mehr oder minder stark mit Bleitröpfchen durchsetzt und müssen sorgfältig von der Badoberfläche entfernt werden. Das geschieht nach bisheriger Praxis mit Hilfe von rechenartigen Ziehhölzern oder mittels Lochkellen, die ein Abtropfen des in den Reaktionsprodukten enthaltenen Bleis erlauben und die Bleiverluste gering halten sollen.The powdery or liquid, in any case fluid reaction products are mostly more or less heavily interspersed with lead droplets and must be carefully removed from the bath surface. According to previous practice, this is done with the aid of rake-like drawing sticks or by means of perforated trowels which allow the lead contained in the reaction products to drip off and which are intended to keep the lead losses low.

Besondere Schwierigkeiten ergeben sich beim Entfernen von Reaktions- und Zwischenprodukten daraus, daß damit häufig eine erhebliche Gefährdung des Personals durch Staub, Hitze und giftige Abgase verbunden ist. Dies gilt insbesondere für die Bleiraffination, die ein möglichst vollständiges Absaugen aller Bleidämpfe und -stäube erforderlich macht. Das ist jedoch während des Entfernens der Reaktionsprodukte wegen der notwendigen Zugänglichkeit der Badoberfläche äußerst schwierig und insbesondere mit einem erheblichen Luftzutritt zur Schmelze verbunden. Das erfordert eine höhere Gebläseleistung und führt zu einer vermehrten Bleioxydation und demgemäß zu erhöhten Bleiverlusten sowie einer höheren Belastung der Abgasreinigung.Particular difficulties arise when removing reaction and intermediate products from the fact that this often involves a considerable risk to personnel from dust, heat and toxic exhaust gases. This applies in particular to lead refining, which requires all lead vapors and dusts to be extracted as completely as possible. However, this is extremely difficult during the removal of the reaction products because of the necessary access to the bath surface and, in particular, is associated with considerable air access to the melt. This requires a higher blower output and leads to an increased lead oxidation and accordingly to an increased lead loss as well as a higher load on the exhaust gas cleaning.

Bekannt ist es auch, bei metallurgischen Mehr-Schlacken-Verfahren zum möglichst weitgehenden Entfernen einer Schlacke vor der Aufgabe neuer Schlackenbildner pneumatische Abschlackvorrichtungen einzusetzen. Diese bestehen üblicherweise aus einem Rohr mit einem T-Stück am einen Rohrende. Das T-Stück ist unterseitig mit einer Lochreihe versehen, durch die Druckluft austritt und die Schlacke in Richtung der Konvertermündung treibt. Eine derartige Vorrichtung eignet sich allenfalls für das Entfernen flüssiger und insbesondere ungiftiger Reaktionsprodukte; sie ist beispielsweise für das Entfernen der Reaktionsprodukte aus der Bleiraffination schon alleine wegen des damit verbundenen hohen Staubanfalls und des Entstehens giftiger Dämpfe nicht geeignet.It is also known to use pneumatic deslagging devices in metallurgical multi-slag processes to remove a slag as far as possible before adding new slag formers. These usually consist of a tube with a T-piece at one end of the tube. The T-piece is provided with a row of holes on the underside, through which compressed air emerges and drives the slag towards the converter mouth. Such a device is at best suitable for removing liquid and in particular non-toxic reaction products; for example, it is for Ent Removing the reaction products from lead refining is not suitable, if only because of the associated high dust accumulation and the generation of toxic vapors.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Entfernen fluider Reaktions- bzw. Zwischenprodukte zu schaffen, die nicht nur zuverlässig, sondern auch besonders umweltfreundlich arbeiten und mit geringen Wertstoffverlusten verbunden sind. Die Lösung dieser Aufgabe besteht darin, daß bei einem Verfahren der eingangs erwähnten Art die Fluidschicht bzw. die fluiden Reaktionsprodukte in den Aufnahmeteil eines ortsfesten Abförderers getrieben werden. Dies kann mechanisch, pneumatisch oder auch elektromagnetisch geschehen. So bietet sich bei der Werkbleiraffination die Verwendung des ohnehin vorhandenen Rührwerks für den Konzentrationsausgleich in der Schmelze und im Falle einer selektiven Oxydation die Benutzung der Oxydationsluft an, um die fluiden Reaktionsprodukte in den Aufnahmeteil des Abförderers zu treiben.The invention is therefore based on the object of providing a method and a device for removing fluid reaction or intermediate products which not only work reliably but also in a particularly environmentally friendly manner and are associated with low losses of valuable materials. The solution to this problem is that, in a method of the type mentioned at the outset, the fluid layer or the fluid reaction products are driven into the receiving part of a stationary removal conveyor. This can be done mechanically, pneumatically or electromagnetically. In the case of plant lead refining, the use of the agitator, which is present anyway, for concentration compensation in the melt and, in the case of selective oxidation, the use of the oxidizing air to drive the fluid reaction products into the receiving part of the conveyor.

Das Entfernen der fluiden Reaktionsprodukte kann mit Hilfe eines in die Fluidschicht hineinragenden Abförderers, vorzugsweise eines Schneckenförderers geschehen. Je nach der Art des Raffinationsverfahrens und der Giftigkeit der Reaktionspartner und -produkte kann das Schmelzgefäß mit einem Rührwerk und/oder einer Abdeckhaube versehen sein. Die Haube und/oder das Fördergehäuse sind vorzugsweise an eine Absaugvorrichtung angeschlossen. Der Schneckenförderer kann ein geschlossenes Gehäuse oder einen Trog, jeweils mit einer Eintritts-und einer Austrittsöffnung im Gehäuse- bzw. Trogboden aufweisen. Er ist vorzugsweise höhenverstellbar angeordnet, um die Eintauchtiefe des Aufnahmeteils bzw. der Förderschnecke in die Fluidschicht verändern zu können.The fluid reaction products can be removed with the aid of a conveyor protruding into the fluid layer, preferably a screw conveyor. Depending on the type of refining process and the toxicity of the reactants and products, the melting vessel can be provided with an agitator and / or a cover. The hood and / or the conveyor housing are preferably connected to a suction device. The screw conveyor can have a closed housing or a trough, each with an inlet and an outlet opening in the housing or trough bottom. It is preferably adjustable in height arranges in order to be able to change the immersion depth of the receiving part or the screw conveyor in the fluid layer.

Um die fluiden Reaktionsprodukte über den Rand des Schmelzgefäßes hinweg abzufördern, können die Förderschnecke und das Gehäuse bzw. der Trog des Schneckenförderers konisch ausgebildet sein. Dasselbe läßt sich erreichen, wenn der Gehäuse- bzw. der Trogboden zweistufig mit einem geneigten Übergang ausgebildet ist und die Förderschnecke aus einer Großdurchmesserstufe, einer Übergangsstufe und einer Kleindurchmesserstufe besteht.In order to discharge the fluid reaction products over the edge of the melting vessel, the screw conveyor and the housing or the trough of the screw conveyor can be conical. The same can be achieved if the housing or trough bottom is designed in two stages with an inclined transition and the screw conveyor consists of a large diameter stage, a transition stage and a small diameter stage.

Sofern die Gefahr einer Ansatzbildung besteht, kann der Abförderer auch mit einer Heizvorrichtung versehen sein, die ein Abschmelzen etwaiger Ansätze erlaubt oder von vornherein eine Ansatzbildung verhindert.If there is a risk of build-up, the discharge conveyor can also be provided with a heating device which allows any build-up to melt or prevent build-up from the outset.

Schließlich kann der Schneckenförderer auch verfahrbar angeordnet sein, um ihn über die Badoberfläche führen zu können. In diesem Falle ist es nicht unbedingt erforderlich, die fluiden Reaktionsprodukte in den Aufnahmeteil des Förderers zu treiben.Finally, the screw conveyor can also be arranged to be movable so that it can be guided over the surface of the bath. In this case, it is not absolutely necessary to drive the fluid reaction products into the receiving part of the conveyor.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert. In der Zeichnung zeigen:

  • Fig. 1 einen Vertikalschnitt durch einen Schmelzkessel zum Raffinieren von Werkblei mit einem erfindungsgemäßen Abförderer und
  • Fig. 2 eine Draufsicht auf die Vorrichtung der Fig. 1.
The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows:
  • Fig. 1 shows a vertical section through a melting vessel for refining lead with an inventive conveyor and
  • FIG. 2 is a top view of the device of FIG. 1.

In einem beheizten Schmelzkessel 1 befindet sich eine Werkbleischmelze 2 mit einer aus fluiden Reaktions- bzw. Zwischenprodukten bestehenden Fluidschicht 3. Der Schmelzkessel 1 ist mit einer Haube 4 abgedeckt, von der ein Absaugstutzen 5 zu einer nicht dargestellten Gasreinigung führt. Die Abdeckhaube 4 ist mit einer Traverse 6 versehen, in der ein von einem Motor 7 angetriebenes, in seiner Drehrichtung wandelbares Rührwerk 8 mit einer Rührwelle 9 und Rührflügeln 10 gelagert ist. Das Rührwerk 8 durchragt eine Traversen- bzw. Haubenöffnung 11, durch die sich mittels einer Metallpumpe auch der Kessel 1 entleeren läßt.In a heated melting tank 1 there is a working lead melt 2 with a fluid layer 3 consisting of fluid reaction or intermediate products. The melting tank 1 is covered with a hood 4, from which a suction nozzle 5 leads to gas cleaning (not shown). The cover 4 is provided with a cross member 6, in which an agitator 8, driven by a motor 7 and changeable in its direction of rotation, is mounted with an agitator shaft 9 and agitator blades 10. The agitator 8 extends through a traverse or hood opening 11 through which the boiler 1 can also be emptied by means of a metal pump.

Ein Schneckenförderer 12 durchragt die Abdeckhaube 4 und taucht unterseitig geringfügig in die Fluidschicht 3 ein; er besteht aus einem Gehäuse 13 und einem gestuften Boden bzw. Trog. Der Boden besteht aus einer unteren, in die Fluidschicht 3 eintauchenden Stufe 14, einem Übergang 15 und einer außerhalb des Raffinationsgefäßes 1 liegenden oberen Stufe 16. Im Bereich der Stufe 14 besitzt der Boden eine Eintrittsöffnung 17 und im Bereich der oberen Stufe 16 eine Austragöffnung 18, unterhalb derer ein Transportgefäß 19 für die abgeförderten Reaktionsprodukte angeordnet ist. Der Schneckenförderer 12 ist auf Hubstempeln 20 höhenverstellbar angeordnet, um die Eintauchtiefe der unteren Gehäusestufe 14 verändern zu können und durch sorgfältiges Einstellen die Bleiverluste gering zu halten. Eine in zwei Wälzlagern 21, 22 gelagerte Welle 23 wird von einem Motor 24 über einen Kettentrieb 25 angetrieben und trägt eine bandförmige Förderschnecke 26 mit einer Großdurchmesserstufe 27, einer Übergangsstufe 28 und einer Kleindurchmesserstufe 29.A screw conveyor 12 projects through the covering hood 4 and dips slightly into the fluid layer 3 on the underside; it consists of a housing 13 and a stepped bottom or trough. The bottom consists of a lower step 14 immersing in the fluid layer 3, a transition 15 and an upper step 16 lying outside the refining vessel 1 , below which a transport vessel 19 for the removed reaction products is arranged. The screw conveyor 12 is arranged on lifting rams 20 so as to be adjustable in height in order to be able to change the immersion depth of the lower housing stage 14 and to keep the lead losses low by careful adjustment. A shaft 23 mounted in two roller bearings 21, 22 is driven by a motor 24 via a chain drive 25 and carries a belt-shaped screw conveyor 26 with a large diameter stage 27, a transition stage 28 and a small diameter stage 29.

Mit Hilfe des Rührwerks 8 wird die Fluidschicht 3 in Richtung auf die Eintrittsöffnung 17 des Schneckenförderers 12 getrieben. Da die Eintrittsöffnung 17 des Schneckenförderers 12 in der Fluidschicht liegt, bewegen die Windungen der Großdurchmesserstufe 27 die Reaktionsprodukte der Fluidschicht 3 aus den Bereich der Eintrittsöffnung über den Gehäuse- bzw. Trogboden 14, 15 und 16 in Richtung auf die Austragöffnung 18. Dabei werden die Reaktionsprodukte über den Kesselrand gehoben und gelangen intermittierend oder kontinuierlich in das Transportgefäß 19. Auf diese Weise lassen sich ohne jede Belastung des Bedienungspersonals und ohne die Gefahr einer stärkeren Bleioxydation durch zusätzliche Falschluft praktisch automatisch die fluiden Reaktionsprodukte von der Badoberfläche entfernen. Soweit dabei giftige Gase und Dämpfe anfallen, werden diese über den Absaugstutzen 5 abgesaugt und schließlich abgeschieden.With the help of the agitator 8, the fluid layer 3 is driven in the direction of the inlet opening 17 of the screw conveyor 12. Since the inlet opening 17 of the screw conveyor 12 lies in the fluid layer, the windings of the large diameter stage 27 move the reaction products of the fluid layer 3 from the region of the inlet opening via the housing or trough bottom 14, 15 and 16 in the direction of the discharge opening 18 Reaction products are lifted over the edge of the vessel and reach the transport vessel 19 intermittently or continuously. In this way, the fluid reaction products can be removed from the bath surface practically automatically without any strain on the operating personnel and without the risk of increased lead oxidation due to additional false air. To the extent that toxic gases and vapors are produced, they are sucked off via the suction nozzle 5 and finally separated.

Claims (12)

1. Verfahren zum Entfernen einer auf einem Bad befindlichen Fluidschicht insbesondere einer Reaktionsproduktschicht der pyrometallurgischen Werkbleiraffination, dadurch gekennzeichnet, daß die Fluidschicht in den Aufnahmeteil eines ortsfesten Abförderers getrieben wird.1. A method for removing a fluid layer located on a bath, in particular a reaction product layer of pyrometallurgical plant refining, characterized in that the fluid layer is driven into the receiving part of a stationary conveyor. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet , daß die Fluidschicht mechanisch, pneumatisch oder elektromagnetisch in den Aufnahmeteil getrieben wird.2. The method according to claim 1, characterized in that the fluid layer is driven mechanically, pneumatically or electromagnetically into the receiving part. 3. Vorrichtung zum Entfernen einer auf einem Bad befindlichen Fluidschicht, insbesondere zur Durchführung des Verfahrens nach den Ansprüchen 1 und 2, gekennzeichnet durch einen in die Fluidschicht (3) hineinragenden Abförderer (12).3. Device for removing a fluid layer located on a bath, in particular for carrying out the method according to claims 1 and 2, characterized by a conveyor (12) projecting into the fluid layer (3). 4. Vorrichtung nach Anspruch 3, gekennzeichnet durch einen in ein Schmelzgefäß (1) ragenden Schneckenförderer (12).4. The device according to claim 3, characterized in that in a melting vessel (1) projecting screw conveyor (12). 5. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet , daß das Schmelzgefäß (1) mit einem Rührwerk (8) und/oder einer Abdeckhaube (4) versehen ist.5. Apparatus according to claim 3 or 4, characterized in that the melting vessel (1) with an agitator (8) and / or a cover (4) is provided. 6. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 5, dadurch gekennzeichnet , daß der Schneckenförderer (12) höhenverstellbar angeordnet ist.6. The device according to one or more of claims 3 to 5, characterized in that the screw conveyor (12) is arranged adjustable in height. 7. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 6, gekennzeichnet durch einen Schneckenförderer (12) mit einem Gehäuse (13) sowie einer Eintrittsöffnung (17) und einer Austragöffnung (18) im Gehäuseboden (14; 15, 16).7. The device according to one or more of claims 3 to 6, characterized by a screw conveyor (12) with a housing (13) and an inlet opening (17) and a discharge opening (18) in the housing base (14; 15, 16). 8. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 7, dadurch gekennzeichnet , daß der Trogboden zweistufig mit einem geneigten Übergang (15) ausgebildet ist und die Förderschnecke (12) aus einer Großdurchmesserstufe (27), einer Übergangsstufe (28) und einer Kleindurchmesserstufe (29) besteht.8. The device according to one or more of claims 3 to 7, characterized in that the trough bottom is formed in two stages with an inclined transition (15) and the screw conveyor (12) from a large diameter stage (27), a transition stage (28) and a small diameter stage (29) exists. 9. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 7, dadurch gekennzeichnet , daß die Förderschnecke (12) und der Trog konisch ausgebildet sind.9. The device according to one or more of claims 3 to 7, characterized in that the screw conveyor (12) and the trough are conical. 10. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 9, dadurch gekennzeichnet , daß der Schneckenförderer (12) verfahrbar angeordnet ist.10. The device according to one or more of claims 3 to 9, characterized in that the screw conveyor (12) is arranged to be movable. 11. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 10, dadurch gekennzeichnet , daß die Haube (4) und/oder das Fördergehäuse (13) mit einer Absaugvorrichtung (5) verbunden sind.11. The device according to one or more of claims 3 to 10, characterized in that the hood (4) and / or the conveyor housing (13) are connected to a suction device (5). 12. Vorrichtung nach einem oder mehreren der Ansprüche 3 bis 11, dadurch gekennzeichnet , daß der Abförderer (12) mit einer Heiz-oder einer Kühlvorrichtung versehen ist.12. The device according to one or more of claims 3 to 11, characterized in that the discharge conveyor (12) is provided with a heating or cooling device.
EP81102994A 1980-04-26 1981-04-18 Device for removing a fluid layer from a bath Expired EP0039035B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3016160 1980-04-26
DE3016160A DE3016160C2 (en) 1980-04-26 1980-04-26 Device for removing a layer of slag from a melt

Publications (2)

Publication Number Publication Date
EP0039035A1 true EP0039035A1 (en) 1981-11-04
EP0039035B1 EP0039035B1 (en) 1986-07-02

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EP81102994A Expired EP0039035B1 (en) 1980-04-26 1981-04-18 Device for removing a fluid layer from a bath

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US (1) US4415144A (en)
EP (1) EP0039035B1 (en)
CA (1) CA1169647A (en)
DD (1) DD158256A5 (en)
DE (1) DE3016160C2 (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
FR2521168A1 (en) * 1982-02-11 1983-08-12 Ass Lead Mfg Ltd IMPROVED PROCESS FOR REMOVING THE ECUME FROM A LEAN AND LEVER REFINING CRUCIBLE USING THE SAME
WO1996021049A1 (en) * 1995-01-07 1996-07-11 Metallgesellschaft Aktiengesellschaft Process and device for separating a specifically lighter phase from a specifically heavier liquid phase
NL1001800C2 (en) * 1995-12-01 1997-06-04 Hoogovens Aluminium Bv Continuous refining smelt, e.g. aluminium@

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Publication number Priority date Publication date Assignee Title
DE3202835C2 (en) * 1982-01-29 1984-11-29 Special'noe proektno-konstruktorskoe i technologičeskoe bjuro elektrotermičeskogo oborudovanija proizvodstvennogo obiedinenija "Sibelektroterm", Novosibirsk Refining apparatus for refining molten metals
CH680468A5 (en) * 1989-08-23 1992-08-31 Gautschi Electro Fours Sa
US5417815A (en) * 1994-02-07 1995-05-23 Martin Marietta Energy Systems, Inc. Liquid surface skimmer apparatus for molten lithium and method
DE29914580U1 (en) * 1999-08-19 2000-01-05 Schwille Elektronik Produktion Device for removing foreign matter from a liquid metal bath
JP6828670B2 (en) * 2017-12-12 2021-02-10 新東工業株式会社 Melting work equipment and melting work method

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US3923499A (en) * 1972-09-29 1975-12-02 Metallgesellschaft Ag Method of removing solids (e.g. copper dross) from molten-lead baths
US3941360A (en) * 1974-12-16 1976-03-02 Chase Brass & Copper Co., Incorporated Mechanical skimmer
DE2520370B2 (en) * 1975-05-07 1979-04-19 Zaporoschskij Industrialnyj Institut, Saporoschje (Sowjetunion) Device for purifying the surface of melted material
US4073481A (en) * 1975-09-08 1978-02-14 The Broken Hill Associated Smelters Proprietary Limited Continuous sulphur drossing apparatus
DE2726078B2 (en) * 1976-06-11 1978-08-17 Kubota Ltd., Osaka (Japan) Method and device for removing slag or the like. of molten metal
DE2852100A1 (en) * 1977-12-01 1979-07-05 Aluminum Co Of America METHOD AND APPARATUS FOR REMOVING SLAG

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521168A1 (en) * 1982-02-11 1983-08-12 Ass Lead Mfg Ltd IMPROVED PROCESS FOR REMOVING THE ECUME FROM A LEAN AND LEVER REFINING CRUCIBLE USING THE SAME
US4460166A (en) * 1982-02-11 1984-07-17 Associated Lead Manufacturers Ltd. Method of removing dross from a lead refining pot
WO1996021049A1 (en) * 1995-01-07 1996-07-11 Metallgesellschaft Aktiengesellschaft Process and device for separating a specifically lighter phase from a specifically heavier liquid phase
NL1001800C2 (en) * 1995-12-01 1997-06-04 Hoogovens Aluminium Bv Continuous refining smelt, e.g. aluminium@

Also Published As

Publication number Publication date
DE3016160A1 (en) 1981-11-12
EP0039035B1 (en) 1986-07-02
DD158256A5 (en) 1983-01-05
CA1169647A (en) 1984-06-26
US4415144A (en) 1983-11-15
DE3016160C2 (en) 1982-12-23

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