EP1240958A2 - Arrangement for the supply of a molten copper alloy - Google Patents

Abstract

Assembly for pouring a molten copper alloy metal (3) has a smelting furnace (1) which tilts around a horizontal swing axis (2) with a pouring tube (4). The molten metal is poured under a protective gas atmosphere (9) at the casting end (5) of a pouring spout (6) and the outlet end of the pouring spout of an ingot mold. A hood (7) shrouds the molten metal against the atmosphere, and the entry for the pouring spout at the hood has a seal (8) with a swing movement.

Description

When copper is melted under ambient conditions, the casting melt tends to absorb gases from the ambient air, which affect the material properties can adversely affect. Although the pouring melt can be e.g. Charcoal or soot will be covered, however, will make contact with the ambient air experience has shown that it is not completely prevented. To get the gas up To prevent the ambient air nevertheless are therefore one in the prior art A number of possibilities have been shown.

DE 41 36 085 C2 proposes in the production of oxygen-free copper wire the melting and casting process take place in a protective gas atmosphere to let. For this purpose, a melting furnace, a downstream holding furnace, to house a tundish and a tundish and these facilities to operate in a protective gas atmosphere. All facilities should do this be as tight as possible and inductively heated contrary to the usual gas heating can be.

EP 0 352 356 B1 describes a process for the continuous casting of steel in one Atmosphere of an inert, non-toxic gas such as argon, the casting processes, where the molten steel is in contact with this atmosphere in a closed, oxygen-free chamber. The technical The effort to set up such a chamber is considerable and also with the Disadvantage connected that the operating personnel only with special breathing apparatus Can enter the chamber to control the casting process.

EP 0 259 772 B1 discloses an arrangement for casting a copper alloy with a spout leading to a tundish, the tundish and the Outflow pipe are each included with a hermetically sealed housing, in which is a non-oxidizing atmosphere from an inert gas.

The transfer of a casting melt from a melting furnace is not without problems in subsequent arrangements without major leakage losses in the protective gas atmosphere. GB 1,181,518 suggests use in this context of a hearth furnace with horizontal longitudinal axis mounted on rollers, whereby when pivoting, the melt ends in the direction of the longitudinal axis emerges from the hearth furnace. One that is movably supported in a gas-tight joint Casting tube for transferring the casting melt allows a relative movement of the Hearth furnace to the following arrangements without access of oxygen.

Starting from the prior art, the invention has for its object a Arrangement for pouring a casting melt consisting of a copper alloy to create with the casting of copper alloys with less Gas absorption and oxide contamination is possible and which with relatively little Effort for various melting furnaces that can be tilted around a horizontal swivel axis can be coupled.

According to the invention, this object is achieved by a horizontal one Swiveling axis swiveling melting furnace with a casting melt discharging Casting pipe through which the pouring melt under a protective gas atmosphere Pouring end of a trough can be fed. The pouring melt comes out of the pouring channel through an outlet in a downstream mold. Essential to the invention is that at least the pouring end of the trough from one is the pouring melt against the atmosphere sealing hood can be covered, the hood of the Watering trough is generally releasably assigned. A seal arrangement is important here, between the one that swings into the hood Casting pipe and the hood is arranged. This sealing arrangement ensures that the casting melt when pivoting the melting furnace under a protective gas atmosphere can be transferred into the trough.

Considerable demands are placed on the sealing arrangement, since these are in the Casting operation must be very robust and reliable. In the invention is advantageous Way takes into account that it is mainly used for filling the trough Gas absorption, especially oxygen, comes. But also when flowing through the The gutter can absorb oxygen from the air humidity and the environment around the gutter become. These sensitive areas of the casting arrangement are now through the device according to the invention is protected in a technically advantageous manner. in this connection it is essential to maintain a protective gas atmosphere, the melting furnace, which is preferably an induction furnace, with a gas-tight one Furnace cover to be provided. However, the most difficult area in terms of sealing technology is the pouring tube which swivels into the hood and which is provided in each Angular position with respect to the hood must be sealed to the outlet of shielding gas as best as possible.

According to the invention, a two-part sealing arrangement can preferably be used for this purpose be provided (claim 2), which is provided above the pouring spout upper sealing unit and a lower one below the pouring spout Sealing unit includes.

An advantageous solution for the sealing units is in the features of the claim 3 seen, the sealing arrangement at least one the pouring tube has associated sealing unit, the surface when pivoting describes a circular arc around the swivel axis of the melting furnace. For this the melting axis of the melting furnace must be in the area of the sealing arrangement lie.

Sealing units which are pivotable with the pouring pipe are particularly suitable those with at least partially rotationally symmetrical surface shape. This can according to claim 4 cylinder segments or hollow cylinder segments his. Spherical segments are also suitable, and these advantageously have one allow further freedom of the seal assembly. The aforementioned Cylinder or hollow cylinder segments and spherical segments can be in opposite directions Recordings of the hood to be performed, with an appropriate gap seal between the hood and the sealing unit, the escape of protective gas is reliably prevented can be. Alternatively, a sealing element, similar to the hood a scraper, be positioned on which the surface of the rotationally symmetrical Sealing unit moves along when pivoting and the hood against Shielding gas outlet seals.

Another advantageous solution is seen in the features of claim 5, after which the sealing unit as a collar with an edge sealing element is trained. In the simplest case, this can be a plate whose radially outer one End when pivoting in cross-section describes an arc and incorporating a sealing element in an oppositely designed one Recording, that is, an arc-shaped recording, performed in the hood is.

Within the scope of the embodiment of claim 6 there is at least one Sealing unit made of a flexible packing seal made of a heat-resistant Material.

In addition, the packing seal can be held in a special receptacle (Claim 7) to get the pivoting movement of the pouring tube better at all times to be able to adapt.

According to the design of claim 8 is at least one sealing unit designed as a flexible mat made of heat-resistant material. The mat can out a fabric or felt. Alternatively, individual ones are also heat-resistant Plates conceivable that are flexibly connected to one another by joints. by virtue of The flexibility of such mats does not necessarily mean that they are above and to be arranged below the pouring pipe. You can, provided the installation conditions allow it to be arranged laterally of the pouring tube.

According to claim 9, at least one sealing unit is a bellows or Folded tube formed, which of course consists of a heat-resistant Material must exist. As a folding tube is also a metallic one or from one other material to understand existing corrugated pipe, which is sufficient flexibility for use as a sealing unit.

The features of claim 10 are also considered to be particularly advantageous, after which the pouring pipe is divided into two sections, a first of which Section is assigned to the melting furnace and a second section of the hood. The two sections can be coupled to one another via an intermediate seal. Even though the pouring tube can basically be made in one piece, are certain Casting process two-piece cast pipes are an advantage. In particular, it can hood-side section via the sealing arrangement can be pivoted with the Hood to be connected while the smelter-side section firmly with the Melting furnace is connected. The furnace can be used with the furnace side Partial be temporarily disconnected from the trough or hood, which is a larger Allows flexibility of the device according to the invention.

But it is also conceivable that the sealing arrangement is configured so that a Sealing unit is firmly connected to the pouring tube and the other sealing unit is firmly connected to the hood, the melting furnace with the pouring tube including the assigned sealing unit pulled out of the hood can be. According to claim 11, the pouring spout is then during the The end of the melting process is sealed gas-tight, also around the melting furnace to keep the uncoupled trough or hood under a protective gas atmosphere.

Of course, it is also possible to use the pouring tube during the melting process into the two sections and the melting section on the furnace side to seal when melting or for certain melting treatments to operate the interior of the melting furnace under a protective gas atmosphere.

Another way to maintain a protective gas atmosphere in the furnace is proposed in claim 12, according to which the hood during Melting process detached from the launder and its opening facing the launder is sealed gas-tight. In practice, this has the advantage that the hood and the trough does not form a rigid unit, but can be flexibly coupled and are manageable that the replacement, cleaning or a separate preheating one Gießrinne is possible without the melting furnace operation being affected.

One possibility of an existing melting furnace with the device according to the invention retrofit is given in the features of claim 13, according to which the melting furnace in its upper area by a cylindrical furnace hood is enclosed. While with a furnace cover, only the loading opening the furnace is closed, a furnace hood can cover the entire top Enclose the area of the furnace.

The advantages come into play especially when according to the patent claim 14 the furnace has a channel-shaped spout, which is not easy can be protected from air ingress by a furnace cover. This can a retrofitted oven hood both the loading opening of the Melting furnace and a channel-shaped spout opening into a pouring pipe enclose and enable furnace operation under protective gas.

According to claim 15, a mold cover is provided, which the casting melt between the outlet of the trough and the entrance to the mold against atmospheric Protect influences and here, too, casting under protective gas allows.

The outlet of the trough can usually be closed by a stopper, which can be operated from outside with a hood covering the trough got to. According to claim 16 it is provided that the plug or a means for Operation of the stopper sealed the hood to prevent leakage To prevent inert gas.

In addition to the hoods described above, which completely cover a tundish, applications are also conceivable in which shorter hoods are appropriate only cover the pouring end of the trough and the outlet with the stopper leave blank, for example, to allow better usability of the plug. If such a short hood lies on the trough, must be ensured be that there is not an unnecessary amount of protective gas through the opening of the hood on the launder escapes. A solution to this problem is in the features of the claim 17 given, the side of the hood facing away from the melting furnace on a Cross run of the trough lies. The crossbar is dimensioned so that it is from the upper edge of the trough to below the level of the one in the trough Casting melt extends, causing the escape of protective gas in the direction of flow the pouring melt is prevented. When using particularly oxygen-affine Alloy components in the copper melt or to reduce Loss of heat can make sense, the casting melt as in the conventional Cover in air with a so-called melt masking agent. For this purpose, carbon-based melt masking agents, such as e.g. Charcoal or carbon black or covering salts or covering agents made of oxides and / or carbonates used. Such melt covering agents can, if necessary in addition below the hood and also in the melting furnace with simultaneous Protective gas atmosphere can be used.

The device according to the invention is particularly suitable for melting furnaces, at which the pouring end of the trough is arranged perpendicular to the pivot axis. This is mainly due to the flow direction given by the direction of the pouring pipe the pouring melt. In the further course of the trough, this can of course run at an angle to the melt of one mold or more Supply molds. Accordingly, a plurality of outlets of the Watering trough with associated plugs can be provided.

The inert gas used to operate the device according to the invention is inert acting gases with constituents of nitrogen and / or argon and / or helium in Question as well as gases with reducing gas additives such as carbon monoxide and / or hydrogen.

A wide variety of process variants can be achieved with the device according to the invention for melting metals and / or alloys, especially of Copper and copper alloys, and pouring under a protective gas atmosphere with extensive Realize exclusion of ambient air. Some process variants are to be explained as examples below.

The device includes, for example, a method for casting a metal alloy, in particular a copper alloy, in which the casting melt from a melting furnace in a continuous continuous casting process at least partially is cast under a protective gas atmosphere, initially with the melting furnace The melted material is loaded and the melted material is melted down. It is also conceivable that pouring melt from a separate furnace into the melting furnace is transferred. During the melting process, further alloy components can be found are added, which can be done for example in air, the oxygen-affine Casting melt is appropriately covered by a melt cover.

After the addition of all alloy components, the furnace chamber is closed and depending on the configuration of the downstream device, a protective gas atmosphere either only in the furnace chamber and the connected pouring pipe or pouring pipe section produced if this is closed at the end according to claim 11 is. As soon as the pouring pipe opens into the hood, the protective gas atmosphere becomes also made in the hood. The hood can do this before Melting the melting material and the alloy components connected to the furnace and be positioned on the trough. Another possibility is that the Hood is positioned on the trough and during the melting of the Melting material and the alloy components are connected to the furnace. A third possibility provides that the hood during the melting of the The melting material and the alloy components are connected to the furnace and before the flooding sealed with protective gas from a trough-side hood closure becomes. After sealing, melting continues under a protective gas atmosphere and after removing the hood lock and positioning the The hood is poured onto the trough under a protective gas atmosphere.

In any case, the casting melt is poured into the trough under a protective gas atmosphere instead, in addition, the mold from a mold cover can be loaded protected under a protective gas atmosphere.

A useful further development of the device is also seen in that a lock in the hood of the casting melt in the pouring channel alloys added can be. As far as one that only covers the pouring end of the trough Hood is used, the area of the hood not covered by the hood can be used Pour melt in the pouring channel with a melt cover.

It goes without saying that the hood can be equipped with a lock the furnace is also fed through a lock in the furnace cover or the furnace hood possible, making the melting process complete can take place under a protective gas atmosphere.

Below are two specific examples of the method-related use of the invention Device for producing the copper alloy CuMg0.7P:

First, the opened melting furnace with melting material, for example copper cathode sheets and then the melted material in air under a charcoal cover melted. Subsequent material, such as Cathode sheets, CuP master alloys and CuMg master alloys added in air and in air further melted. Then the furnace is closed and at the The trough of the positioned hood is flooded with argon as a protective gas. The molten metal is then poured into the trough under a protective gas atmosphere, whereby the hood completely covers the trough and the mold has a mold cover is connected upstream.

According to a second variant, the opened melting furnace is charged with melting material, whereupon the furnace cover and the furnace-side section of the pouring pipe closed with a closure plate and the furnace with the associated Part of the pouring tube is flooded with argon. The gutter and the Hoods have not yet been positioned at this point. The melting process follows in a protective gas atmosphere with a charcoal cover, using additional material through a lock or alternatively through the open furnace cover is then closed again and flooded with protective gas becomes. During the melting process under protective gas, the trough is added the hood is positioned in front of the melting furnace and the argon protective gas atmosphere produced by connecting the two sections of the pouring tube in the hood. The pouring of the molten metal into the trough under a protective gas atmosphere and the mold is then filled with the associated mold cover.

The peculiarities of the above-mentioned methods aim at the disadvantageous To prevent the influence of components of the ambient air on the molten metal. The invention can therefore be applied particularly advantageously to molten metals, which contain low levels of dissolved oxygen, oxides and / or nitrides should.

Elements that tend to form oxide are, for example, beryllium (Be), magnesium (Mg), zircon (Zr), aluminum (Al), titanium (Ti), silicon (Si), boron (B), manganese (Mn), Chromium (Cr), Zinc (Zn), Phosphorus (P), Iron (Fe), Tin (Sn), Cobalt (Co), Nickel (Ni) and lead (Pb). Elements prone to nitrite formation are zirconium (Zr), titanium (Ti), Aluminum (Al), tantalum (Ta), boron (B), niobium (Nb), magnesium (Mg), vanadium (V), silicon (Si) and chrome (Cr). The device according to the invention is therefore suitable especially for the production of casting melts with the aforementioned alloying elements. In practice, however, surprisingly it turns out that the particular advantages of the invention only with certain casting melts and alloys occur while other casting melts or alloys themselves behave relatively unproblematically, e.g. Cu, Pb, Zn group alloys, though these up to 10% and more of the oxide-forming alloy elements Pb and Zn contain. CuSP with approx. 0.2 to 0.5% sulfur (S) and 0.003 to 0.012% phosphorus (P), although sulfur and especially that for deoxidation used phosphorus can be oxidized intensively by atmospheric oxygen. Other unproblematic casting melts are e.g. CuNi melting when except Nickel has no other elements that are strong for oxide formation or nitrite formation tend.

Figuren 1 und 2

eine Vorrichtung zum Abgießen einer Gießschmelze während des Schmelzvorgangs und des Abgießens;

Figuren 3 bis 5

Ausführungsformen von Dichtungsanordnungen mit Dichtungseinheiten, die beim Verschwenken eines Schmelzofens einen Kreisbogen um die Schwenkachse beschreiben;

Figuren 6 bis 9

weitere Ausführungen von Dichtungseinheiten (Packungsdichtung, flexible Matte, Faltenbalg);

Figuren 11 bis 14

verschiedene Kombinationsmöglichkeiten der in den Figuren 3 bis 9 dargestellten Dichtungseinheiten;

Figuren 15 und 16

Vorrichtungen mit kurzer bzw. langer auf einer Gießrinne positionierten Haube, wobei das Abgußrohr von der Haube getrennt und endseitig verschlossen ist;

Figuren 17 und 18

Vorrichtungen mit kurzer bzw. langer auf einer Gießrinne positionierten Haube, wobei das dem Schmelzofen zugeordnete Teilstück des Abgußrohrs endseitig verschlossen ist;

Figuren 19 und 20

Vorrichtungen mit langer bzw. kurzer Haube, deren einer Gießrinne zugewandte Öffnung jeweils verschlossen ist;

Figuren 21 und 22

Vorrichtungen, bei denen der obere Bereich eines Schmelzofens von einer Ofenhaube umschlossen ist;

Figuren 23 und 24

Vorrichtungen mit langer bzw. kurzer Haube und zwischen einem Auslauf und einer Kokille angeordneter Kokillenabdeckung und

Figuren 25 bis 27

Vorrichtungen mit verschieden konfigurierten Gießrinnen.

The invention is explained in more detail below on the basis of exemplary embodiments schematically illustrated in the drawings. The figures show (FIGS. 1 to 24 in vertical longitudinal section, FIGS. 25 to 27 in plan view):

Figures 1 and 2

a device for pouring a pouring melt during the melting process and the pouring;

Figures 3 to 5

Embodiments of sealing arrangements with sealing units which describe a circular arc around the pivot axis when pivoting a melting furnace;

Figures 6 to 9

further versions of sealing units (packing seal, flexible mat, bellows);

Figures 11 to 14

Different combinations of the sealing units shown in Figures 3 to 9;

Figures 15 and 16

Devices with short or long hood positioned on a trough, the pouring pipe being separated from the hood and closed at the end;

Figures 17 and 18

Devices with short or long hoods positioned on a casting trough, the end of the section of the casting tube associated with the melting furnace being closed;

Figures 19 and 20

Devices with a long or short hood, the opening of which is directed towards a launder is closed;

Figures 21 and 22

Devices in which the upper area of a melting furnace is enclosed by a furnace hood;

Figures 23 and 24

Devices with long or short hood and between a spout and a mold arranged mold cover and

Figures 25 to 27

Devices with differently configured troughs.

Figures 1 and 2 illustrate how a furnace 1 around a horizontal Pivot axis 2 is displaceable and there is casting melt 3 in it Casting pipe 4 is supplied to a pouring end 5 of a pouring spout 6. Above the Casting channel 6 is a pouring melt 3 transferred into casting channel 6 compared to Environmentally shielding hood 7 is arranged, in which the pouring tube 4th engages pivotally. Between the pouring pipe 4 and the hood 7 is one Sealing arrangement 8 incorporated, on the one hand, the air access to the casting melt 3 prevents and on the other hand the escape of protective gas from the inside the melting furnace 1, the pouring tube 4 and the hood 7 prevented, so as to To maintain protective gas atmosphere 9 in the aforementioned areas.

A furnace cover 10, which has an intermediate furnace seal, also serves this purpose 11 closes the melting furnace 1 gas-tight. The pouring pipe 4 is in sections 25, 26 articulated, the interposition of a seal 27 with each other are connected.

The sealing arrangement 8 shown schematically in FIGS. 1 and 2 is based on of Figures 3 to 14 explained in more detail below. Basically every sealing arrangement is 8 in an upper sealing unit arranged above the pouring tube 4 12, 12a-12e and in a lower one arranged below the pouring tube 4 Sealed unit 13, 13a-13e.

In the exemplary embodiment according to FIG. 3, the upper sealing unit 12 and the lower sealing unit 13 designed as a hollow cylinder segments, the surfaces when pivoting the melting furnace 1 a circular arc around the Describe pivot axis 2. The pouring tube 4 is in the pivoted position in broken lines drawn. Sealing elements attached to the hood 7 14 lie on the surfaces of the sealing units 12 when pivoted, 13 and prevent gas exchange with the environment.

Figures 4 and 5 show an embodiment in which the upper sealing unit 12a is designed as a radial web with sealing element 15 on the end, which when pivoting the melting furnace 1 on the concave inside of a cross section circular-shaped receptacle 16 of a hood 7a slides along. The lower one Sealing unit 13 is again designed as a hollow cylinder segment, with its Surface slides along a sealing element 14.

In addition to the arc-shaped sealing units 12, 12a, 13 according to FIG 6 also packing seals made of a heat-resistant material as sealing units 12b, 13b. These sealing units 12b, 13b can in Recordings 17 of the hood 7 to be held to the pivoting movement of the pouring tube 4 to follow the pivot axis 2 well. The receptacle 17 can optionally limited pivotally connected to the hood 7.

Instead of packing seals, sealing units 12c, 13c in are also suitable Form of flexible mats made of heat-resistant material (Figure 7). This can be a Be fabric or felt. It is also possible to articulate individual plates with one another to connect to ensure the necessary flexibility of the seal assembly 8.

FIGS. 8 and 9 show a sealing arrangement 8 in which the sealing units 12d, 13d are configured as bellows, these bellows over a plate 18 is connected to the pouring tube 4.

Figures 10 and 11 show a solution in which the upper sealing unit 12a as a radial web with sealing element 15 and the lower sealing unit 13b as flexible packing seal are designed in a receptacle 17 of the hood 7a. Also in this embodiment, the receptacle 17 can be pivoted at least to a limited extent be connected to the hood 7a.

FIG. 12 shows the upper sealing unit designed as a radial web with a sealing element 15 12a combined with a flexible mat as the lower sealing unit 13c.

FIG. 13 shows the combination of an upper sealing unit designed as a cylinder segment 12 with a packing seal as the lower sealing unit 13b and figure 14 with a mat of heat-resistant material as the lower sealing unit 13c. In particular in the case of a configuration as shown in FIG. 13, the cast pipe can 4 are easier to pull out of the hood 7, which makes the device very is flexible.

FIG. 15 shows such a case, the hood 7b being positioned on the casting trough 6 is arranged separately from the hood 7b during the melting furnace 1 with the pouring tube 4 is. The hood 7b and the pouring tube 4 are each a sealing unit 12e, 13e assigned. In this embodiment, the pouring tube 4 is at the end closed by a cover 19. 15 is the configuration of a Shown short hood 7b, which does not extend over the entire length of the trough 6 extends, but only the pouring end 5 of the trough 6 covered. Here is the Side 20 of the hood 7b facing away from the melting furnace 1 on an average here Cross bar 21 shown in the runner 6.

In contrast to the exemplary embodiment according to FIG. 16, in which the Hood 7 extends over the entire length of the trough 6, is an outlet in Figure 15 22 for the pouring melt 3 in the pouring channel 6 freely accessible.

The complete encapsulation of the casting trough 6, as shown in FIG. 16, makes it necessary a stopper 23 necessary for closing the outlet 22 the hood 7 by a sealing element 24 to seal the outlet of protective gas from the hood 7 to prevent.

Are melting furnace 1 and pouring channel 6 brought together, the furnace 1 can in the exemplary embodiments described above about a pivot axis 2 be pivoted.

FIGS. 17 and 18 show exemplary embodiments which, on the one hand, are in use distinguish a short hood 7b and a long hood 7, wherein however, on the other hand, the pouring pipe 4 into a first one assigned to the melting furnace 1 Section 25 and a second section 26 assigned to the hood 7b, 7 is. The embodiment shown in Figures 17 and 18 has the advantage that at flexible handling of the melting furnace 1 and the hood 7b, 7 which are only schematic illustrated sealing arrangement 8 together with the hood-side section 26 can remain on the hood 7b, 7, while the furnace section 25 in turn can be closed gas-tight by a cover 19.

According to the embodiments of Figures 19 and 20, which in turn is in the Different use of hoods 7, 7b, the hoods 7, 7b not positioned on a trough 6, but over the pouring tube 4 and schematically shown sealing arrangement 8 connected to the melting furnace 1. Hood closures 28, 28a arranged on the launder side close the hoods 7, 7b gas-tight, so that a protective gas atmosphere 9 in the melting furnace 1, the pouring tube 4 and the hoods 7, 7b, decoupled from the trough 6, is possible.

In the embodiment of FIG. 21, the melting furnace 1 is in its upper one Area 29 enclosed by an oven hood 30 with an oven cover 31. The advantages of this arrangement are particularly evident when the Melting furnace 1 has a spout 32 (FIG. 22) which is connected to a pouring pipe 4a opens. In this embodiment, the pouring tube 4a is on its the spout 32 facing upward funnel-shaped to inflow Casting melt 3 to be recorded without loss. Also in the representations of the figures 21 and 22, the sealing arrangement 8 is illustrated only schematically.

The embodiments of Figures 23 and 24 largely correspond to those previously explained embodiments with the difference that one of the outlet 22 of the Casting trough 6 downstream mold 33 is provided with a mold cover 34, in which there is also a protective gas atmosphere 9a and which consists of the casting trough 6 Protecting pouring melt 3 protects against contact with the ambient air. From figure 24 can also be seen that the crosspiece 21 extends from the upper edge 35 of the Gutter 6 to below the level 36 of those in the gutter 6 Casting melt 3 extends. This seals the hood 7b from the Environment ensures, as far as sufficient casting melt 3 in the pouring channel 6 is available.

The seal arrangement 8 is again only schematic in both embodiments illustrated.

An essential feature of the invention is that the device is advantageous in casting plants can be installed with characteristic geometric arrangements. A such a characteristic arrangement can be seen in the fact that the trough 6 is largely perpendicular to the pivot axis 2 of the melting furnace 1 and the to loading molds 33 in the pivoting direction largely before Melting furnace 1 or slightly laterally offset from the melting furnace 1. in this connection is the size of the melting furnace 1 with the size and number of at the same time casting formats in certain relations. Experience has shown that melting furnaces 1 the outer distance Z of the tilting joints of the melting furnace 1 is approximate Measure of the furnace size, so that it matches the arrangement of the casting strands can be related. The following applies in principle to those in FIGS. 25 to 27 Embodiments shown that Y should be less than 3 x Z, where Y is the measure from the center line M of the melting furnace 1 to the outer edge of the respective casting format 38. In the case of symmetrical troughs 6a, as shown in FIG. 25, Y1 equal to Y2, whereas with asymmetrical troughs 6b, as in FIG. 26 illustrates that Y1 and Y2 can have different values. At the double-strand casting, as shown in FIG. 27, these values are complied with in any case, provided the trough 6 is arranged in front of the melting furnace 1.

REFERENCE NUMBERS

1 -

furnace

2 -

Swivel axis v. 1

3 -

casting melt

4 -

Abgußrohr

4a -

Abgußrohr

5 -

Pouring v. 6

6 -

launder

6a -

launder

6b -

launder

7 -

Hood

7a -

Hood

7b -

Hood

8th -

sealing arrangement

9 -

Protective atmosphere

9a -

Protective atmosphere

10 -

furnace cover

11 -

oven seal

12 -

upper sealing unit

12a -

upper sealing unit

12b -

upper sealing unit

12c -

upper sealing unit

12d -

upper sealing unit

12e -

upper sealing unit

13 -

lower sealing unit

13b -

lower sealing unit

13c -

lower sealing unit

13d -

lower sealing unit

13e -

lower sealing unit

14 -

Sealing element on 7

15 -

sealing element

16 -

Inclusion in 7a

17 -

Recording for 12b, 13b

18 -

Plate on 4th

19 -

cover

20 -

Page v. 7b

21 -

Cross bar in 6

22 -

Outlet v. 6

23 -

Plug

24 -

sealing element

25 -

first section v. 4

26 -

second section v. 4

27 -

poetry

28 -

hood closure

28a -

hood closure

29 -

upper area v. 1

30 -

oven hood

31 -

Furnace cover v. 30

32 -

Spout on 1st

33 -

mold

34 -

mold cover

35 -

Top edge of 6

36 -

Height level from 3 in 6

37 -

Articulated joint v.1

38 -

casting format

M -

Center line v. 1

Y -

Distance between M u. Outer edge of 38

Y1 -

Subsection v. Y

Y2 -

Subsection v. Y

Z -

Distance of 37

Claims (17)

Arrangement for pouring a casting melt consisting of a copper alloy (3) which can be pivoted about a horizontal pivot axis (2) Has melting furnace (1), from which the casting melt (3) under a protective gas atmosphere (9) a pouring end (5) of a trough (6, 6a, 6b) and over an outlet (22) of the casting trough (6, 6a, 6b) of a mold (33) can be fed, wherein at least the pouring end (5) of the casting trough (6, 6a, 6b) from the casting melt (3) hood (7, 7a, 7b) sealing against the atmosphere (A) and a casting tube (4, 4a) assigned to the melting furnace (1) with inclusion a sealing arrangement (8) can be pivoted into the hood (7, 7a, 7b) engages. Arrangement according to claim 1, in which the sealing arrangement (8) a Upper sealing unit (12, 12a-12e) provided above the pouring pipe (4) and a lower sealing unit (13,) below the pouring pipe (4) 13b-13e). Arrangement according to claim 2, in which the sealing arrangement (8) at least a sealing unit (12, 12a; 13, assigned to the casting pipe (4), 13a) with at least one circular arc section. Arrangement according to claim 3, characterized in that the sealing unit (12, 13) is designed as a cylinder segment, hollow cylinder segment or spherical segment, which is guided in a sealingly configured receptacle of the hood (7a) or on a sealing element (14) of the hood (7) is. Arrangement according to claim 3, wherein the sealing unit (12a) as Radial web with edge sealing element (15) is formed, the Sealing element (15) in a counter-shaped receptacle (16) Hood (7a) is guided. Arrangement according to one of claims 2 to 5, in which at least a sealing unit (12b, 13b) as a flexible packing seal made of a heat-resistant Material is formed. Arrangement according to claim 6, in which the packing seal (12b, 13b) in a part of the hood (7, 7a) or the trough (6) forming the receptacle (17) is held. Anodnung according to any one of claims 2 to 7, in which at least one Sealing unit (12c, 13c) designed as a flexible mat made of heat-resistant material is. Arrangement according to one of claims 2 to 8, in which at least a sealing unit (12d, 13d) is designed as a bellows or folding tube. Arrangement according to one of Claims 1 to 9, in which the pouring pipe (4) a first section (25) assigned to the melting furnace (1) and one of the Cover (7, 7a, 7b) associated second section (26), the sections (25, 26) can be coupled to one another via an intermediate seal (27). Arrangement according to claim 10, in which at least one with the Melting furnace (1) connected section (25, 26) of the pouring tube (4) during of the melting process is sealed gas-tight at the end. Arrangement according to one of Claims 1 to 10, in which the hood (7, 7b) during the melting process from the launder (6) and their the Gutter (6) facing opening of a hood closure (28, 28a) gas-tight is closed. Arrangement according to one of Claims 1 to 12, in which the upper region (29) of the melting furnace (1) is enclosed by a cylindrical furnace hood (30) is. Arrangement according to claim 13, in which the melting furnace (1) a in a pouring pipe (4a) opening channel-shaped spout (32), which of the Oven hood (30) is tightly enclosed. Arrangement according to one of claims 1 to 14, in which between the Outlet (22) of the trough (6) and the mold (33) a mold cover (34) is arranged. Arrangement according to one of Claims 1 to 15, in which the outlet (22) can be closed by a stopper (23) which seals the hood (7) interspersed. Arrangement according to one of claims 1 to 16, in which the hood (7b) only covers the pouring end (5) of the trough (6), which is the melting furnace (1) opposite side (20) of the hood (7b) on one of the upper edge (35) the trough (6) to below the level (36) of the one in the trough (6) Casting melt (3) projecting crossbar (21) rests.

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