EP3081658A1 - Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide - Google Patents

Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide Download PDF

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Publication number
EP3081658A1
EP3081658A1 EP15164033.1A EP15164033A EP3081658A1 EP 3081658 A1 EP3081658 A1 EP 3081658A1 EP 15164033 A EP15164033 A EP 15164033A EP 3081658 A1 EP3081658 A1 EP 3081658A1
Authority
EP
European Patent Office
Prior art keywords
transport container
inert gas
filling
liquid metal
lid
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.)
Withdrawn
Application number
EP15164033.1A
Other languages
German (de)
English (en)
Inventor
Regina Hupfer
Bernward Höppner
Volker Heidtmann
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.)
Oetinger Aluminium Wh GmbH
Original Assignee
Oetinger Aluminium Wh GmbH
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 Oetinger Aluminium Wh GmbH filed Critical Oetinger Aluminium Wh GmbH
Priority to EP15164033.1A priority Critical patent/EP3081658A1/fr
Publication of EP3081658A1 publication Critical patent/EP3081658A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/04—Refining by applying a vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • B22D41/05—Tea-pot spout ladles

Definitions

  • the present invention relates to a method for filling a transport container with liquid metal and a transport container for liquid metal.
  • melt cleaning of liquid aluminum is performed to reduce air and moisture contact of liquid aluminum intended for shipment.
  • a method is for example in the DE 43 07 867 A1 described.
  • an inert gas treatment is carried out after the transfer of the melt in a container provided for transport.
  • the inert gas treatment is carried out under vacuum and the melt is stirred by means of an agitator.
  • the inert gas is injected here and preferably blown under the melt surface, for example by a stirring head.
  • impurities and reaction products are suspended and removed from the melt surface.
  • the liquid aluminum is transported in the transport container.
  • This method has the disadvantage that even when transferring the liquid aluminum in the transport container, the melt can come into contact with oxygen and moisture, and thus the amount of oxides is increased.
  • the object of the present invention is therefore to provide a solution by means of which the metal loss, in particular metal loss due to oxidation, can be reduced.
  • the invention is based on the finding that this object can be achieved by setting desired conditions in the transport container before the liquid metal is introduced.
  • the invention therefore relates to a method for filling a transport container for liquid metal, in particular liquid aluminum.
  • the method is characterized in that at least prior to the introduction of the metal into the transport container, the transport container is charged with inert gas.
  • the liquid metal supplied to the transport container is preferably liquid aluminum or a liquid aluminum alloy.
  • the liquid metal is also referred to as liquid aluminum for the sake of simplicity, the statements correspondingly apply to aluminum alloys, without explicitly mentioning them become.
  • the liquid metal is also referred to below as a melt.
  • a transport container a container is preferably referred to, which can be transported on a vehicle, in particular a truck.
  • the transport container preferably has a shape that allows a pivoting of the transport container for emptying the transport container.
  • the transport container has a holding pipe and, on the other hand, an outlet opening, which preferably merges into a pouring spout.
  • the transport container be raised for example by means of a crane and a chain provided thereon and pivoted about the axis of the holding pipe for emptying.
  • the outlet opening of the transport container is in this case preferably provided in the upper region of the wall of the transport container.
  • a spout for example, having a tubular shape, extends outwardly from the wall of the shipping container from the discharge port.
  • the transport container also preferably has on the top a releasably secured lid, which closes an opening in a Verschroishaube, which can also be referred to as Abkrrienö réelle.
  • the transport container may have a lid which closes the spout of the transport container and is releasably secured thereto.
  • the transport container may for example have a capacity of 5 t.
  • the transport container is charged with inert gas.
  • inert gas which can also be referred to as inert gas, this is understood to mean a gas which is inert with respect to the liquid metal, that is to say in which no or only a few chemical reactions occur with the liquid metal.
  • the inert gas is preferably inert.
  • the inert gas is introduced at least before filling the transport container in this.
  • the supply of inert gas can also be maintained during and optionally after the filling of the transport container.
  • By introducing the inert gas before filling the transport container is flooded with the inert gas. This means that preferably the entire interior of the transport container is filled with inert gas before the start of filling. Through the liquid metal, a portion of the inert gas from the.
  • Transport container displaced.
  • the space above the melt surface in the transport container is filled with inert gas.
  • the transport container By filling the transport container with inert gas prior to introducing the liquid metal, that is before filling the transport container, a number of advantages can be achieved.
  • the metal stream which flows into the transport container during filling, can be protected by the inert gas.
  • the melt surface of the liquid metal already accumulated in the transport container in the transport container can also be protected from contact with oxygen and moisture.
  • the inert gas employed in the process of the invention may be any gas which is inert to the liquid metal.
  • noble gases such as argon can be used for liquid aluminum.
  • nitrogen is used as the inert gas.
  • This gas is used as a protective gas for aluminum and is also less expensive than other possible inert gases.
  • inert gas is also supplied to the transport container during the filling of the transport container.
  • the transport container is already filled with inert gas before filling the transport container with liquid metal, it is advantageous to maintain the inert gas supply even during the filling process. In this way, the entry of oxygen or moisture into the transport container can be reliably prevented and the protection of the liquid metal, in particular of the Behellstrahls be maintained against oxidation.
  • the inert gas is introduced at a low operating pressure in the transport container.
  • the inert gas is at a pressure above ambient pressure and below the pressure used to move or affect the melt surface of the liquid metal in the Transport container is necessary, is located, introduced.
  • the ambient pressure is the pressure of the surroundings of the transport container. Before introducing the inert gas, the ambient pressure is also present in the interior of the transport container. The ambient pressure is usually about 1 bar.
  • the pressure necessary to move the melt surface of the liquid metal in the transport container is dependent upon the removal of the inlet port for the inert gas to the melt surface. Preferably, however, a pressure is assumed which does not lead to a movement of the melt surface at a minimum distance between the inlet opening and the melt surface.
  • the transport container can be reliably filled with inert gas, that is, flooded.
  • the pressure with which the inert gas is introduced into the transport container is preferably in the range from 2 to 6 bar, and particularly preferably at 4 bar.
  • the protective gas is introduced during the filling of the transport container with liquid metal above the melt surface of the liquid metal.
  • a lower pressure for the supply of the inert gas is sufficient than when feeding below the melt surface.
  • the position of the gas supply above the melt surface caused by the gas supply at a suitable pressure, no movement of the melt.
  • the metal beam which enters the transport container and which is above a melt surface already formed, be protected by the inert gas.
  • the inert gas is introduced through an inlet opening in a detachable lid of the transport container.
  • a component is preferably referred to, which closes an opening of the transport container.
  • the lid closes an opening in a Verschroishaube the transport container.
  • the closure cap in turn represents the upper boundary of the interior of the transport container and is preferably detachably or pivotally connected to the body of the transport container.
  • the opening in the cap, which is closed by the lid is also referred to as Abkrrienö réelle the transport container.
  • the inlet opening for the inert gas in this case the opening is referred to, via the gas exits into the interior of the transport container.
  • the inlet opening does not constitute a passage opening for a lance or another gas line but the actual outlet opening of the gas.
  • the inert gas is introduced via the spout of the transport container in the transport container.
  • the spout is provided on the transport container in the upper region and is connected via the outlet opening with the interior of the transport container. About the outlet usually the liquid metal is removed from the transport container.
  • the inert gas can be introduced into the transport container via this spout and its outlet opening.
  • the filling of the transport container with liquid metal then takes place via the scraping opening.
  • a lid is preferably placed on the spout, in which an inlet opening for the inert gas is provided.
  • the invention relates to a transport container for liquid metal, in particular for liquid aluminum.
  • the transport container is characterized in that it has an inlet opening for the inlet of inert gas in the upper region.
  • the opening is referred to as the inlet opening, via which gas emerges into the interior of the transport container.
  • the inlet opening does not constitute a passage opening for a lance or another gas line but the actual outlet opening of the gas.
  • the advantages can be achieved in particular that a reliable complete filling, ie flooding of the transport container can be ensured before filling, and also during the filling a reliable gas supply into the room ensured above the melt surface.
  • the inlet opening may be provided in the wall of the transport container in the upper region of the transport container of the transport container.
  • the inlet opening is provided on or in a cover of the transport container, which closes the Abkrrienö réelle.
  • the inlet opening may also be provided on or in a lid which closes the pouring spout.
  • an inlet opening is referred to, which is offset to the underside of the lid, for example via a pipe, down.
  • an inlet opening is referred to, which lies in the underside of the lid.
  • the inert gas occurs directly on the underside of the lid in the interior of the transport container or in the spout.
  • the provision of the inlet opening on or in the lid of the transport container has a number of advantages.
  • the lid which covers the scraping opening is provided at the highest position in the transport container, whereby the above-mentioned advantages of reliable flooding and protection of a filling jet can be achieved.
  • a lid which closes the spout is provided in the upper region of the transport container, so that the above-mentioned advantages can be achieved reliably even in this embodiment.
  • both the lid, which closes the Abkrticianö réelle and the alternatively usable lid, which closes the spout releasably provided on each opening of the transport container, which are already provided for other functions of the transport container.
  • structural measures on existing transport containers such as the introduction of a hole in the wall of the transport container is not required.
  • the gas line can be easily connected because the lid is easily accessible.
  • the inlet opening for the protective gas is spaced from the filling opening for filling the transport container with liquid metal.
  • the outlet opening in the pouring spout is used according to an embodiment, via which the transport container can also be emptied.
  • the scraping opening in the closing hood of the transport container is used as the filling opening.
  • the transport container according to the invention is designed for carrying out the method according to the invention.
  • FIG. 1 an embodiment of a transport container 1 according to the invention is shown schematically.
  • the transport container 1 has a body 10 which has a round or oval cross-section and which tapers in the upper region.
  • the interior 100 of the transport container 1 is formed, which serves for receiving liquid metal, in particular liquid aluminum.
  • the interior 100 of the body 10 of the transport container 1 is provided with a lining 101.
  • On the outside of the transport container 1 holding stubs 12 are provided laterally.
  • a pouring spout 11 is provided in the upper region of the body 10 of the transport container 1.
  • the pouring spout 11 has a tubular shape in the illustrated embodiment and passes over the outlet opening 110 of the transport container 1.
  • a Verschallehaube 13 is placed on the body 10 of the transport container 1 .
  • the closure cap 13 therefore closes the open body 10 upwards.
  • a lid 14 is introduced in the illustrated embodiment.
  • the lid 14 closes an opening in the closure cap 13, which is also referred to as Abkrrienö réelle 130.
  • the Closing hood 13 is preferably removably or pivotally attached to the body 10 of the transport container 1 and can thus be removed or unfolded relative to the body 10.
  • the lid 14 is detachably connected to the closure cap 13 and can be inserted, screwed or otherwise connected, for example, in the Abkrrienö réelle 130.
  • a gas supply 141 is provided on the lid 14.
  • the gas supply 141 is formed in the embodiment shown by a bent tube which projects into the surface of the lid 14.
  • the end of the gas feed 141 which projects into the lid 14 and preferably lies on the underside of the lid 14, represents the inlet opening 140 for inert gas.
  • the other end of the gas feed 141 is preferably provided with a connection 142, through which the gas feed 141 a gas line 143 can be connected, is passed via the inert gas to the gas supply 141 and above to the inlet port 140.
  • a support 144 for supporting the gas supply 141 is provided on the cover 14.
  • the gas supply 141 can be used together with the support 144 as a handle to the cover 14 on the transport container 1, in particular in the opening of the Versch95haube 13, insert and remove.
  • the transport container 1 Before liquid metal, in particular liquid aluminum, is filled into the transport container 1, the transport container 1 is preheated.
  • a cover 14 is applied to the transport container 1, on which or in which an inlet opening 140 is provided for inert gas.
  • the lid 14 may have a closed lid (not shown) to be used for transportation, also referred to as Abkrriendeckel is called replace.
  • the gas supply 141 of the cover 14 is then connected via the port 142, which may represent, for example, a 3 ⁇ 4 inch hose connection, to the gas line 143 for inert gas.
  • the gas line 143 may form part of a service network.
  • the pressure with which the inert gas enters the gas supply 141 and above into the inner space 100 of the transport container 1 can be adjusted by a valve 145. For example, a usual operating pressure of 8 to 10 bar down to 2 to 6 bar.
  • Nitrogen is preferably used as the inert gas.
  • the nitrogen is preferably liquefied cryogenic and used in the quality
  • the outlet opening 110 and in particular the casting spout 11 are preferably opened during the flooding of the transport container 1.
  • the inert gas which is the case for example for a transport container with a capacity of liquid aluminum of 5t after 2 minutes
  • the pouring spout 11 and the outlet opening 110 which in this case represents the filling opening , liquid metal, in particular liquid aluminum filled in the transport container 1.
  • a filling channel (not shown) is applied to the pouring spout 11.
  • the gas supply from the gas conduit 143 can be interrupted. As a result, no inert gas passes more to the gas supply 141 and thus also not into the transport container 1.
  • the gas supply 141 can then be separated from the gas line 143 via the connection 142. However, the gas supply 141 may also remain connected to the gas line 143. In this state, the lid 14 can be removed from the transport container 1 and replaced by a closed lid for transport. Alternatively, it is also possible that the lid 14 the transport container 1 is left and only a closure piece (not shown) to the gas supply 141 or the terminal 142 is attached.
  • no lid is applied to the scraping opening 130.
  • a cover 14 ' is applied to the spout 11, which closes the spout 11 and thus the outlet opening 110.
  • the lid 14 ' is in FIG. 1 indicated by dashed lines.
  • the lid 14 ' may also be the in FIG. 3 have shown construction.
  • the above remarks on the cover 14 are therefore also applicable to the cover 14 'which closes the pouring spout 11.
  • the Abkrfordö réelle 130 serves as a filling while the inert gas is supplied via the spout 11.
  • the metal losses can be reduced by oxidation and gas absorption.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
EP15164033.1A 2015-04-17 2015-04-17 Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide Withdrawn EP3081658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15164033.1A EP3081658A1 (fr) 2015-04-17 2015-04-17 Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15164033.1A EP3081658A1 (fr) 2015-04-17 2015-04-17 Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide

Publications (1)

Publication Number Publication Date
EP3081658A1 true EP3081658A1 (fr) 2016-10-19

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Application Number Title Priority Date Filing Date
EP15164033.1A Withdrawn EP3081658A1 (fr) 2015-04-17 2015-04-17 Récipient de transport pour métal liquide et procédé de remplissage d'un récipient de transport de métal liquide

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EP (1) EP3081658A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008842A1 (fr) * 1989-02-06 1990-08-09 Klöckner Stahl Gmbh Procede permettant d'eviter la formation de gaz de fumee lors de processus metallurgiques et du transport de metaux fondus d'un recipient metallurgique a des recipients de coulee et dispositif de transport de metaux fondus d'un four metallurgique a un recipient de coulee
WO1992007099A1 (fr) * 1990-10-20 1992-04-30 Klöckner Stahl Gmbh Dispositif d'inertisation de cuves de coulee pour le transport de metaux en fusion
DE4307867A1 (de) 1993-03-12 1994-06-01 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Schmelzereinigung von Flüssigaluminium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008842A1 (fr) * 1989-02-06 1990-08-09 Klöckner Stahl Gmbh Procede permettant d'eviter la formation de gaz de fumee lors de processus metallurgiques et du transport de metaux fondus d'un recipient metallurgique a des recipients de coulee et dispositif de transport de metaux fondus d'un four metallurgique a un recipient de coulee
WO1992007099A1 (fr) * 1990-10-20 1992-04-30 Klöckner Stahl Gmbh Dispositif d'inertisation de cuves de coulee pour le transport de metaux en fusion
DE4307867A1 (de) 1993-03-12 1994-06-01 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Schmelzereinigung von Flüssigaluminium

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