BATH TRANSFER SYSTEM FOR RECEIVING, TRANSPORTING AND CONVEYING MOLTEN METAL

Abstract

The present application relates to a bath transfer system having a vessel for receiving molten metal, a duct for conveying the molten metal from the vessel through the duct, a vessel cover for air-tightly sealing a vessel interior, and a control unit for controlling the conveying of the molten metal from the vessel through the duct. The control unit being designed and configured to stop the molten metal from continuing to be conveyed in the event of a drop in the measured pressure. An associated control process is also included.

Claims

1-15. (canceled)

16. A method for emptying a melt transfer system, comprising a vessel for receiving molten metal, a flow duct, including a riser, for feeding the molten metal from a vessel through the flow duct, and a vessel cover for closing the vessel in an air-tight manner, comprising the following steps: i. feeding the molten metal from the vessel through the flow duct; ii. determining a pressure in the vessel during feeding; and iii. halting the feeding of the molten metal in the event of a drop of the measured pressure.

17. The method according to claim 16, wherein the feeding of the molten metal is halted when a pressure difference between a pressure determined at a first point in time and a pressure determined at a second point in time is negative, the negative pressure difference preferably being greater, in absolute terms, than a previously established threshold value.

18. The method according to claim 16, wherein a time profile over time is determined based on the measured pressure, and a time derivative dp/dt of the pressure profile is ascertained based on the time profile over time, and the feeding of the molten metal is halted when the derivative dp/dt is negative, the negative derivative, in absolute terms, being greater than a previously established threshold value.

19. The method according to claim 18, wherein the threshold value, in absolute terms, is at least 1 mbar/s, including at least 5 mbar/s, and at least 10 mbar/s.

20. The method according to claim 16, wherein a second pressure is measured at a second location, the second measured pressure correlating with a pressure in the vessel, with a pressure in the pneumatic unit for setting a pressure difference between an ambient pressure and a pressure in the vessel and/or with a pressure in the flow duct.

21. The method according to claim 16, wherein the pressure profile over time is measured based on pressure measurements at defined time intervals.

22. The method according to claim 18, wherein in each case at least two, and including at least three, consecutively measured pressures are averaged and the time derivative is ascertained based on the averaged pressures and/or a frequency of the pressure profile over time is filtered using a bandpass filter.

23. The method according to claim 16, wherein a pressure difference between the first, vessel-side end and the second end of the flow duct is reduced for halting the feeding of the molten metal, as soon as the ascertained derivative of the pressure profile is negative and, in absolute terms, is greater than a previously established threshold value.

24. A melt transfer system for storing and transporting molten metal, comprising: a vessel for receiving the molten metal; a vessel cover, arranged on the vessel, for closing the vessel in an air-tight manner, comprising a closable filling opening for filling the vessel with the molten metal; a flow duct, comprising a first end arranged in the vessel, and a second end arranged outside the molten metal vessel for feeding the molten metal from the molten metal vessel; a measuring unit comprising at least one pressure sensor for measuring a pressure in the vessel during the feeding; and a control unit for controlling the feeding of the molten metal out of the vessel through the flow duct, the control unit being configured and designed to halt the feeding of the molten metal in the event of a drop of the measured pressure.

25. The melt transfer system according to claim 24, wherein the control unit is designed and configured to determine the time profile over time p(t) from the measured pressure, to ascertain a time derivative of the pressure profile dp/dt, and to halt the feeding of the molten metal when the derivative of the pressure profile dp/dt is negative, and when the derivative, in absolute terms, is greater than a previously established threshold value.

26. The melt transfer system according to claim 24, wherein the control unit is designed and configured to reduce a pressure difference between the first, vessel-side end and the second end of the flow duct for halting the feeding of the molten metal, and/or the threshold value, in absolute terms, is at least 1 mbar/s, including at least 5 mbar/s, and at least 10 mbar/s.

27. The melt transfer system according to claim 25, wherein the control unit is designed and configured to average in each case at least two, and including at least three, pressures measured consecutively by the measuring unit and to ascertain the derivative based on the averaged pressures.

28. The melt transfer system according to claim 24, wherein the at least one pressure sensor is arranged on an inner side of the vessel cover and/or in a pneumatic unit.

29. The melt transfer system according to claim 24, further comprising an oblique positioning device for tilting the vessel, the oblique positioning device comprising at least one base connected to the melt transfer system in an articulated manner and a vessel-side locking device for locking the base in a functional position, the base being movable from an idle position into a functional position, and protruding over a vessel underside in the functional position.

30. The melt transfer system according to claim 24, wherein the vessel cover includes a filling opening for filling the vessel with molten metal, a filling opening cover for closing the filling opening in an air-tight manner, a heating opening, comprising a connecting flange surrounding the heating opening for flange-mounting a preheating device and for flange-mounting a heating opening cover, and a heating opening cover for closing the heating opening in an air-tight manner, the heating opening cover being detachably fastened to the vessel cover and closing the heating opening in an air-tight manner.

Description

[0058] In the drawings:

[0059] FIGS. 1 (a) to (d) show four perspective views of a melt transfer system;

[0060] FIG. 2 shows a schematic sectional view of the melt transfer system of FIG. 1;

[0061] FIG. 3 shows a schematic sectional view of the vessel that has been almost emptied, including residual molten metal present in the vessel;

[0062] FIGS. 4 (a) and (b) show an air/molten metal mixture in the riser;

[0063] FIG. 5 shows a pressure profile in the vessel during the feeding of the molten metal;

[0064] FIG. 6 shows a further pressure profile in the vessel during the feeding of the molten metal as well as a time derivative of the pressure profile;

[0065] FIG. 7 shows the pressure profile of FIG. 5, wherein the time derivative was smoothed with averaged pressures;

[0066] FIG. 8 shows the pressure profile of FIG. 5, wherein additionally the time has been taken into consideration;

[0067] FIG. 9 shows a schematic sectional representation of the melt transfer system;

[0068] FIGS. 10 (a) and (b) show the oblique positioning device in two perspective views;

[0069] FIG. 11 shows a section of the vessel comprising a supporting frame in a perspective view;

[0070] FIG. 12 shows the supporting frame in a further perspective view;

[0071] FIG. 13 shows the vessel with parts of the vessel-side oblique positioning device in a side view;

[0072] FIGS. 14 (a) to (f) show a schematic representation of the method steps for obliquely positioning the vessel by way of a forklift truck; and

[0073] FIG. 15 shows the burner unit in a perspective view.

[0074] FIG. 1 shows a melt transfer system 1 comprising a vessel 2 for receiving molten metal, a vessel cover 3 for closing the vessel 2 in an air-tight manner, a filling opening 4, and a filling opening cover 5. FIGS. 1 (a) and 1 (b) show the melt transfer system 1 from two different perspective views. FIG. 1 (c) shows the same view as FIG. 1 (b), the filling opening cover 5 being shown opened. The vessel 2 can be filled with hot molten metal through the filling opening 4. After a filling process, the filling opening 4 can be closed in an air-tight manner by the filling opening cover 5. A pressure can be applied to a vessel interior space 7 of the vessel 2 via a pneumatic unit 6. For this purpose, air is conducted from the pneumatic unit 6 at a pressure of 0.4 bar, for example, through a pneumatic unit 6.1 into the vessel interior space 7. The melt transfer system 1 furthermore comprises a flow duct in the form of a riser 8. When pressure is applied to the vessel interior space 7 by the pneumatic unit 6, a pressure difference arises between a first end 8.1 of the riser 8, which is arranged in the vessel 2, and a second end 8.2 of the riser 8, which is arranged outside the vessel 2. As a result of this pressure difference, the melt present in the vessel 2 is fed from the first end 8.1 to the second end 8.2, and the vessel 2 can be emptied. A thermocouple 9 for monitoring the temperature of the molten metal is furthermore arranged at the vessel cover 3, the thermocouple protruding into the vessel interior. The vessel cover 3 furthermore includes a heating opening 10 having a heating opening cover 10.1 arranged thereon. The melt transfer system 1 moreover comprises fork pockets 11 in which the forklift tines can engage. The fork pockets 11 are box-shaped and designed so as to be approachable from 4 sides. The melt transfer system furthermore comprises an oblique positioning device 12, comprising a base 12.2 and a supporting frame 12.1 including a swivel joint unit 12.1.1.

[0075] FIG. 2 shows a melt transfer system 1 of FIG. 1 in a sectional view along an xy-plane. Recurring features are denoted by identical reference numerals in this and the following figures. The vessel 2 includes an interior lining comprising a refractory compound 13. Viewed from the outside in, the vessel 2 then comprises an insulating layer 14. The outside cladding 15 of the vessel 2 is made of steel. In FIG. 2, a burner unit 10.2 is mounted on a connecting flange 10.3, instead of the heating opening cover 10.1. The burner unit 10.2 is preferably fixed to the vessel cover 3 by clamps. The connecting flange 10.3 projects from the vessel cover 3 and is inclined in relation to the xz-plane. The melt transfer system 1 furthermore comprises a control unit 16, which can communicate with the melt transfer system 1, and in particular with the pneumatic unit 6.

[0076] FIG. 3 shows a schematic sectional view of a vessel that has been almost emptied, including residual molten metal 17 present in the vessel. The molten metal can be aluminum, for example. The vessel is furthermore filled with air 18. Air 18 can penetrate into the riser 8 through a gap 19 between the first end 8.1 of the riser and the molten metal 17 having a gap height 19.1. This air/melt mixture in the riser 8 is shown in FIG. 4 (b). During a melt transfer process at a point in time at which the first end 8.1 of the riser 8 is completely immersed in molten metal 17, only molten metal 17 is present in the riser 8, as shown in FIG. 4 (a). When air 18 penetrates into the riser through the gap 19.1, the air 18 accelerates the molten metal 17 in the riser 8 in FIG. 4 (b) in such a way that hazardous metal splash arises at the second end 8.2 of the riser.

[0077] FIGS. 5 to 8 show exemplary pressure profiles 20 over the time during a feeding of molten metal. Based on such pressure profiles 20, the control unit 16 can prompt the feeding of the molten metal to be halted, that is, the emptying process of the vessel 2 to be halted, and thereby avoid the above-described metal splash. At the start of an emptying process of the vessel, the pneumatic unit 6 causes a pressure increase in the vessel. In the process, a measuring unit, that is, at least one pressure sensor, measures the pressure in the vessel 2. For this purpose, the pressure sensor can be mounted on a vessel cover underside 3.1, for example (see FIG. 2). The control unit 16 ascertains the pressure profile 20 p(t) from the measured pressures.

[0078] FIG. 5 shows a pressure profile during the transfer of the molten metal through the riser 8 from the first end 8.1 to the second end 8.2. The transfer begins at the end of area I, at the transition to area II, and metal flows out of the second end 8.2 of the riser 8. Area II corresponds to a vortex effect. A normal pressure increase during the feeding is shown in areas III and V. Area IV represents a pressure drop as a result of a brief interruption in the transfer by an operator. The emptying point is reached at the beginning of area IV, resulting in a drastic drop in pressure and a negative pressure difference: Δp=p.sub.i−p.sub.i-1≤0.

[0079] In areas II, IV and VI, negative derivatives dp/dt of the pressure profile p(t) arise due to the brief or longer-lasting pressure drops. In addition to the pressure profile 20, FIG. 6 shows the time derivative 21 of the pressure profile 20. This is determined by the control unit and is smaller than zero in area VI.

[0080] Smoothing of the time derivative curve 21 can be advantageous for a functionally reliable evaluation of the pressure values, so that incorrect evaluation results due to pressure fluctuations can be avoided to the extent possible. When a simple comparison of p.sub.i and p.sub.i-1 is carried out, the profile of the time derivative oscillates. For a smoothing of the pressure gradient, it is advantageous to average the last three or more pressure readings, so that the measured values measured by the pressure sensor are filtered. The control unit 16 is configured and designed to carry out this averaging. FIG. 7 shows the time derivative dp/dt filtered and is denoted by reference numeral 21f. The control unit can be designed to determine the filtered derivative as follows:

[0081] The more values are used for filtering, the smoother the profile of the time derivative becomes. A smoother profile, however, also causes the response time to become longer. The response time is the time that the control unit requires to identify the pressure drop.

[0082] The control unit can be designed to determine the filtered derivative as follows:

[00001] $\frac{dp}{dt} = \frac{ρ_{t} - ρ_{t - 1}}{Δ t}$ $Δ t = t_{p_{t}} - t_{p_{t - 1}}$

[0083] where

[00002] $\begin{matrix} p_{t - 1} = \frac{1}{2} {.Math.}_{i = 0}^{1} P_{i} = \frac{p_{0} + p_{1}}{2} \\ p_{t} = \frac{1}{2} {.Math.}_{i = 1}^{2} P_{i} = \frac{p_{1} + p_{2}}{2} \\ {Δ p}_{t} = p_{t - 1} - p_{t} \end{matrix} .$

[0084] This profile is illustrated in FIG. 8. The control unit is designed and configured to ascertain the time derivative of the pressure drop 20, and to shut off a feeding of molten metal through the riser 8 as soon as the derivative is smaller than zero. In particular, the control unit can be configured to only shut off the feeding of molten metal through the riser 8 when the derivative is smaller than zero, and the derivative, in absolute terms, is greater than a threshold value. This threshold value can be 12 mbar/s, for example.

[0085] After the feeding of molten metal 17 has been shut off, residual molten metal 17 typically remains in the vessel 2. So as to prevent this, after solidifying, from clogging the first end 8.1 of the riser 8, the melt transfer system 1 is advantageously equipped with an oblique positioning device 12. FIG. 9 shows a schematic sectional illustration of the melt transfer system 1, which is obliquely positioned by way of the oblique positioning device in such a way that the molten metal 17 has flown into a region located opposite the riser 8, and thereby exposes the first end 8.1 of the riser.

[0086] FIG. 10 shows the oblique positioning device 12 (at least partially). The oblique positioning device 12 comprises a base 12.2, which is pivotably hinged at two vessel-side flanges 12.3. The base 12.2 can thus be pivoted from a functional position into an idle position. FIG. 10 shows the base in an idle position. The vessel-side flanges 12.3 each include a first borehole 12.3.1, which in the functional position are positioned coaxially to a first base-side borehole 12.2.1. FIG. 10 (b) furthermore shows a locking pin 12.4, which locks the base 12.2 in the idle position. The vessel-side flanges 12.3 can each include a second borehole 12.3.2 through which the locking pin 12.2 is pushed so as to lock the base in the idle position. As is apparent from FIG. 10 (b), the vessel-side flange can comprise multiple flange regions, for example in the form of individual flanges. The expression “vessel-side flange” is used as a general concept for one or more flanges that are connected to the vessel. The base 12.2 furthermore includes a third base-side borehole 12.2.3 for locking the base to a supporting frame by way of a further locking pin.

[0087] FIG. 11 shows the vessel 2 including a supporting frame 12.1. The supporting frame 12.1 comprises a swivel joint unit 12.1.1, by way of which the vessel 2 is pivotably connected to the supporting frame 12.1 in such a way that the vessel 2 can be tilted about a rotational axis A of the swivel joint unit 12.1.1 in relation to the supporting frame 12.1, wherein the vessel 2 can be supported in the tilted position by the base 12.2 that is locked in the functional position.

[0088] FIG. 12 shows the supporting frame in a perspective view. In addition to the swivel joint unit 12.1.1, the supporting frame comprises a lower locking device 12.1.2, which includes two flanges, each including a borehole 12.1.2.1. The boreholes are coaxially aligned so that the base 12.2 can be fastened to the supporting frame 12.1 by the locking pin in the functional position. For this purpose, a further locking pin 12.4 can be pushed through the third base-side borehole 12.2.3 and the two boreholes 12.1.2.1 of the lower locking device. FIG. 13 shows the corresponding elements of the swivel joint unit 12.1.1, which are fastened, preferably welded, to the vessel. The vessel-side swivel joint unit 12.1.1 is arranged on an outer side at the vessel 2 opposite the base attachment in the form of the vessel-side flanges 12.3. The supporting frame comprises two box-shaped fork pockets 11, arranged so as to cross one another, for receiving forklift tines. The supporting frame furthermore comprises an alignment device for setting the supporting frame inclination in relation to a floor surface on which the supporting frame is arranged. This, however, is not shown in the figure.

[0089] FIG. 14 (a) shows the melt transfer system 1 of the above figures schematically on a forklift truck. The tines of the forklift truck are positioned in the fork pockets 11 in the process. So as to obliquely position the vessel 2, the melt transfer system 1 is raised off the floor by way of the forklift truck, for example 200 mm. The base 12.2 is pivoted by an operator 23 from an idle position into a functional position along the arrow 24 (see FIG. 14 (b)). The base 12.2 is locked in the functional position by way of the locking pin 12.4 (see FIG. 14 (c)).

[0090] FIG. 14 (d) shows the schematic illustration of the forklift truck 22 with the melt transfer system 1 with the folded-out base 12.2 in the functional position. In FIG. 14 (e), the transfer system 1 of FIG. 14 (d) is lowered so that the vessel 2 with the folded-out base 12.2, wherein the melt transfer system 1 is lowered so that the vessel is inclined in relation to a floor surface 25 by 5°. After the melt transfer system 1 has been lowered, the base 12.2 can be locked by way of the lower locking device 12.1.2 at the supporting frame 12.1 using a further locking pin 12.4, as described above (see FIG. 14 (f)).

[0091] FIG. 1 (d) shows the melt transfer system 1 in a perspective view. The melt transfer system 1 corresponds to that of the figures above. The burner unit 10.2 is fastened to a connecting flange 10.3 by clamping so that the burner 10.2.2 protrudes into the vessel interior space 7. The burner is preferably a gas burner by which the vessel interior space can be preheated. The connecting flange 10.3 projects upwardly from an upper side of the vessel cover 3 and is arranged in such a way that the burner 10.2.2 does not fire the riser 8 directly. The riser 8 is used as a chimney during preheating and is thus advantageously heated.

[0092] FIG. 1 (a) shows the melt transfer system 1 in a perspective view. The melt transfer system 1 corresponds to that of the figures above. In FIG. 1 (a), the heating opening is closed in an air-tight manner by the heating opening cover 10.1. For this purpose, the heating opening cover is fastened to the connecting flange 10.3 by clamping. The heating opening has a diameter of 9 cm and is round. The filling opening has a diameter of 60 cm, and the vessel cover has a diameter of 110 cm. The vessel cover and the filling opening cover are made of steel and lined with a refractory compound.

[0093] FIG. 15 shows the burner unit 10.2 in a perspective view. The burner unit 10.2 comprises a plug for supplying the burner with power. The burner unit 10.2 furthermore comprises a gas connector 10.5 for connecting gas, and an air connector 10.6 for connecting an air supply. A burner pipe 10.7 is arranged in a spatially separated manner from the connections 10.4, 10.5 and 10.6 by a burner connecting flange 10.2.1, so that the burner pipe 10.7 protrudes into the vessel 2 when the burner unit 10.2 is mounted to the connecting flange 10.3, while the connections are arranged easily accessible for an operator outside the vessel interior space 7 on a vessel cover upper side 3.2.

[0094] The application includes, among other things, the following aspects: [0095] 1. A melt transfer system, comprising a vessel for receiving molten metal, a flow duct for feeding the molten metal from a vessel through the flow duct, and a vessel cover for closing the vessel in an air-tight manner, and an oblique positioning device for tilting the vessel, [0096] characterized in that [0097] the oblique positioning device comprises at least one base connected to the vessel in an articulated manner and a vessel-side locking device for locking the base in a functional position, the base being movable from an idle position into a functional position, and protruding over a vessel underside in the functional position. [0098] 2. The melt transfer system according to aspect 1, characterized in that the vessel-side locking device comprises a detent, clamping or snap-fit mechanism or comprises a locking pin. [0099] 3. The melt transfer system according to aspect 2, characterized in that the vessel comprises a first flange including a first flange-side borehole, and the base includes a first base-side borehole, which is aligned coaxially to the first flange-side borehole in the functional position, and the locking pin can be pushed through the first flange-side borehole and the first base-side borehole for locking the base in the functional position. [0100] 4. The melt transfer system according to aspect 3, characterized in that the base includes a second base-side borehole, which is aligned coaxially to the first flange-side borehole in the idle position, so that the locking pin can be pushed through the first flange-side borehole and the second base-side borehole for locking the base in the idle position. [0101] 5. The melt transfer system according to any one of the preceding aspects, characterized in that the base can be pivoted from the idle position into the functional position. [0102] 6. The melt transfer system according to aspect 5, characterized by a fastening pin, which rotatably connects the base to the flange and along the fastening pin longitudinal direction of which a rotational axis is defined, about which the base can be pivoted from the idle position into the functional position, and vice versa. [0103] 7. The melt transfer system according to any one of aspects 3 to 6, characterized by a second flange, which is designed to correspond to the first flange, the base being arranged between the two flanges. [0104] 8. The melt transfer system according to any one of the preceding aspects, characterized by a supporting frame comprising a swivel joint unit, by way of which the vessel is pivotably connected to the supporting frame in such a way that the vessel can be tilted about a rotational axis of the swivel joint unit in relation to the supporting frame, the vessel being supported in the tilted position by the base that is locked in the functional position. [0105] 9. The melt transfer system according to aspect 8, characterized in that the supporting frame comprises a supporting frame-side locking device for locking the base in the functional position. [0106] 10. The melt transfer system according to aspect 9, characterized in that the base includes a third borehole, which is designed to receive a second locking pin in the functional position, the lower locking device including at least one supporting frame-side borehole, which is arranged coaxially with the third base-side borehole in the functional position so that the second locking pin can be pushed into the third base-side borehole and the supporting frame-side borehole of the lower locking device for fastening the base to the lower supporting frame. [0107] 11. The melt transfer system according to any one of aspects 8 to 10, characterized in that the supporting frame comprises at least one pair of, preferably box-shaped, fork pockets for receiving forklift truck tines. [0108] 12. The melt transfer system according to any one of the preceding aspects, characterized by an alignment device for setting a vessel inclination and/or a supporting frame inclination. [0109] 13. The melt transfer system according to any one of the preceding aspects, characterized by [0110] a measuring unit comprising at least one pressure sensor for measuring a pressure in the vessel during the feeding, and [0111] a control unit for controlling the feeding of the molten metal out of the vessel through the flow duct, the control unit being configured and designed to halt the feeding of the molten metal in the event of a drop of the measured pressure, and/or in that the vessel cover includes a filling opening for filling the vessel with molten metal, a filling opening cover for closing the filling opening in an air-tight manner, a heating opening comprising a connecting flange surrounding the heating opening for flange-mounting a preheating device and for flange-mounting a heating opening cover, and a heating opening cover for closing the heating opening in an air-tight manner, the heating opening cover being detachably fastened to the vessel cover and closing the heating opening in an air-tight manner. [0112] 14. A method for tilting a vessel of a melt transfer system according to any one of aspects 1 to 13, comprising the following steps: [0113] raising the device by at least 5 cm; [0114] bringing the base from an idle position into a functional position so as to protrude over an underside of the vessel; [0115] locking the base in the functional position; and [0116] lowering the melt transfer system. [0117] 15. The method according to aspect 14, to the extent that this aspect has a back-reference to aspect 9, comprising the following step: [0118] locking the base by way of the supporting frame-side locking device. [0119] 16. A melt transfer system, comprising a vessel for receiving molten metal, a flow duct for feeding the molten metal from a vessel through the flow duct, and a vessel cover for closing a vessel interior space in an air-tight manner, [0120] characterized in that [0121] the vessel cover includes a heating opening, comprising a connecting flange surrounding the heating opening for flange-mounting a preheating device and for flange-mounting a heating opening cover, and a heating opening cover for closing the heating opening in an air-tight manner, the heating opening cover being detachably fastened to the vessel cover and closing the heating opening in an air-tight manner. [0122] 17. The melt transfer system according to aspect 16, characterized in that the heating opening has a diameter of at least 4 cm, and preferably at least 6 cm, and/or a diameter of no more than 30 cm, and preferably no more than 20 cm. [0123] 18. The melt transfer system according to aspect 16 to 17, characterized in that the vessel cover comprises [0124] a filling opening for filling the vessel with molten metal, and a filling opening cover for closing the filling opening in an air-tight manner, and/or [0125] a filling device for filling the vessel through the flow duct. [0126] 19. The melt transfer system according to aspect 16, 17 or 18, characterized in that the vessel cover has a diameter of at least 50 cm, and preferably at least 70 cm. [0127] 20. The melt transfer system according to any one of the preceding aspects, characterized in that the heating opening cover is fastened to the vessel cover by way of clamps and/or screws. [0128] 21. The melt transfer system according to any one of the preceding aspects, characterized in that the heating opening cover comprises a refractory layer. [0129] 22. The melt transfer system according to any one of the preceding aspects, characterized in that the connecting flange projects from a cover upper side in such a way that a flange plane is spaced apart from the cover upper side, the flange plane preferably having a distance of at least 10 mm, and particularly preferably at least 30 mm. [0130] 23. The melt transfer system according to aspect 22, characterized in that the flange plane forms an angle with the cover upper side of at least 109, preferably at least 20°, and particularly preferably at least 30°, and/or of no more than 90′, preferably no more than 80, and particularly preferably no more than 70°. [0131] 24. The melt transfer system according to any one of the preceding aspects, characterized in that the heating opening cover comprises a handle. [0132] 25. The melt transfer system according to any one of the preceding aspects, characterized in that the heating opening cover comprises a blind flange for closing the heating opening. [0133] 26. The melt transfer system according to any one of the preceding aspects, characterized in that the connecting flange is designed in such a way that a corresponding flange of a preheating device, and in particular of a gas burner or of an electronic heating element, for preheating the vessel interior space can be flange-mounted on the flange by way of clamps or screws. [0134] 27. The melt transfer system according to aspect 26, characterized in that the connecting flange is designed in such a way that a gas flame of a flange-mounted gas burner is aligned in the direction of the vessel bottom, and preferably the middle of the vessel bottom. [0135] 28. The melt transfer system according to aspect 26 or 27, comprising a burner cover, comprising a preheating device, preferably a gas burner, comprising a flange that corresponds to the connecting flange of the heating opening. [0136] 29. The melt transfer system according to any one of the preceding aspects, characterized by an oblique positioning device for tilting the vessel, the oblique positioning device comprising at least one base connected to the melt transfer system in an articulated manner and a vessel-side locking device for locking the base in a functional position, the base being movable from an idle position into a functional position, and protruding from a vessel underside in the functional position. [0137] 30. The melt transfer system according to any one of the preceding aspects, characterized by [0138] a measuring unit comprising at least one pressure sensor for measuring a pressure in the vessel during the feeding, and [0139] a control unit for controlling the feeding of the molten metal out of the vessel through the flow duct, the control unit being configured and designed to halt the feeding of the molten metal in the event of a drop of the measured pressure. [0140] 1 melt transfer system [0141] 2 vessel [0142] 3 vessel cover [0143] 3.1 vessel cover underside [0144] 3.2 vessel cover upper side [0145] 4 filling opening [0146] 5 filling opening cover [0147] 5.1 gas tension springs [0148] 6 pneumatic unit [0149] 6.1 pneumatic line [0150] 7 vessel interior space [0151] 8 riser [0152] 8.1 first end of the riser [0153] 8.2 second end of the riser [0154] 9 thermocouple [0155] 10 heating opening [0156] 10.1 heating opening cover [0157] 10.2 burner unit [0158] 10.2.1 flange of the burner unit [0159] 10.2.2 burner [0160] 10.3 connecting flange [0161] 10.4 plug [0162] 10.5 gas connector [0163] 10.6. air connector [0164] 10.7 burner pipe [0165] 11 fork pockets [0166] 12 oblique positioning device [0167] 12.1 supporting frame [0168] 12.1.1 swivel joint unit [0169] 12.1.2 lower locking device [0170] 12.1.2.1 borehole in the lower locking device [0171] 12.2 base [0172] 12.2.1 first base-side borehole [0173] 12.2.2 second base-side borehole [0174] 12.2.3 third base-side borehole [0175] 12.3 vessel-side flange [0176] 12.3.1 first borehole on vessel-side flange [0177] 12.3.2 second borehole on vessel-side flange [0178] 12.4 locking pin [0179] 12.5 pivot pin [0180] 13 refractory compound [0181] 14 insulating layer [0182] 15 outside cladding [0183] 16 control unit [0184] 17 molten metal [0185] 17.1 molten metal level [0186] 18 air [0187] 19 gap [0188] 19.1 fgap height [0189] 20 pressure profile p(t) [0190] 21 time derivative dp/dt [0191] 21f time derivative dp/dt filtered [0192] 22 forklift truck [0193] 23 operator [0194] 24 pivot direction [0195] 25 floor surface [0196] 26 vertical distance between floor surface and melt transfer device [0197] A rotational axis

BATH TRANSFER SYSTEM FOR RECEIVING, TRANSPORTING AND CONVEYING MOLTEN METAL

Assignee

Inventors

Cpc classification

Classification Explorer

B22D17/32

PERFORMING OPERATIONS; TRANSPORTING

Classification Explorer

B22D46/00

PERFORMING OPERATIONS; TRANSPORTING

Classification Explorer

F27D3/14

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Classification Explorer

F27D21/0028

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Classification Explorer

B22D17/30

PERFORMING OPERATIONS; TRANSPORTING

Classification Explorer

B22D39/06

PERFORMING OPERATIONS; TRANSPORTING

International classification

Classification Explorer

B22D17/30

PERFORMING OPERATIONS; TRANSPORTING

Classification Explorer

F27D3/14

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Abstract

Claims

Description