WO2023215928A1 - Station de préchauffage pour préchauffer un dispositif de transport de matière fondue - Google Patents

Station de préchauffage pour préchauffer un dispositif de transport de matière fondue Download PDF

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Publication number
WO2023215928A1
WO2023215928A1 PCT/AT2023/060153 AT2023060153W WO2023215928A1 WO 2023215928 A1 WO2023215928 A1 WO 2023215928A1 AT 2023060153 W AT2023060153 W AT 2023060153W WO 2023215928 A1 WO2023215928 A1 WO 2023215928A1
Authority
WO
WIPO (PCT)
Prior art keywords
melt
transport device
flow channel
melt transport
preheating station
Prior art date
Application number
PCT/AT2023/060153
Other languages
German (de)
English (en)
Inventor
Harald SEHRSCHÖN
Ludwig HOFER
Gerhard Sieglhuber
Martin Boindecker
Original Assignee
Fill Gesellschaft M.B.H.
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 Fill Gesellschaft M.B.H. filed Critical Fill Gesellschaft M.B.H.
Publication of WO2023215928A1 publication Critical patent/WO2023215928A1/fr

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Classifications

    • 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
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • B22D39/023—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a displacement member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F27D13/002—Preheating scrap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B2014/085—Preheating of the charge
    • F27B2014/0856—Preheating of the crucible

Definitions

  • the invention relates to a preheating station for preheating a melt transport device, as well as a casting device with the preheating station and the melt transport device, and a method for preheating the melt transport device by means of the preheating station.
  • a melt transport device is designed with at least one melt container, in which a melt receiving space and a spout in the form of a lance lying underneath the melt container are formed, the spout having a pouring opening which is connected to the melt receiving space flow s.
  • the object of the present invention was to provide an auxiliary device for the casting device and a casting process by means of which an improved casting result can be achieved.
  • a preheating station is designed for preheating the melt transport device, the preheating station comprising:
  • the preheating station has the advantage that a melt receiving space of the melt transport device can be brought to a sufficiently high temperature so that when the melt transport device is started up or when the melt transport device is filled for the first time, the melt hits surfaces that have already been pre-tempered. This means that oxide formation can be largely prevented when the melt is absorbed. Oxide formation can be achieved by reducing the local cooling of the melt. In particular with aluminum melts, an improvement in the melt quality can be achieved, since aluminum melts are particularly prone to forming an oxide skin when cooled locally. In addition, this measure can prevent local solidification of the melt on a cold surface.
  • a computing unit is designed, the air heater and the fan being controlled by the computing unit and a first temperature sensor being arranged in the flow channel and coupled to the computing unit, the computing unit being designed to control the air heater and that Control the fan based on the information from the first temperature sensor.
  • a computing unit is designed, the air heater and the fan being controlled by the computing unit and a first temperature sensor being arranged in the flow channel and coupled to the computing unit, the computing unit being designed to control the air heater and that Control the fan based on the information from the first temperature sensor.
  • the computing unit is designed to be coupled to a second temperature sensor, the second temperature sensor being arranged in the melt transport device.
  • the second temperature sensor can be coupled to the computing unit by means of an information line.
  • the second temperature sensor can be wirelessly coupled to the computing unit.
  • the fan is arranged in front of the air heater as viewed in the direction of flow. This has the advantage that the blower The air flowing through is not yet heated, which can increase the service life of the fan.
  • the air heater is arranged as close as possible to the transition to the melt transport device. This measure allows heat losses to be kept as low as possible and energy efficiency to be kept as high as possible.
  • a return channel is formed, by means of which at least parts of an exhaust air flow from the melt transport device can be returned to the flow channel.
  • the return channel viewed in the flow direction, to open into the flow channel after the blower, with the return channel opening into the flow channel in such a way that the exhaust air flow is drawn into the flow channel using the Venturi effect.
  • This has the advantage that the air flowing through the fan is not heated, which can increase the service life of the fan.
  • a heat exchanger is formed on the flow channel, the heat exchanger being coupled to an exhaust air duct for conveying an exhaust air flow from the melt transport device. This has the advantage that this measure can improve energy efficiency, since thermal energy from the exhaust air flowing out of the melt transport device can be used.
  • the casting device includes
  • preheating station for preheating the melt transport device.
  • the preheating station is designed according to one of the above versions.
  • the casting device has the advantage that a melt receiving space of the melt transport device can be brought to a sufficiently high temperature by means of the preheating station, so that the melt is raised when the melt transport device is started up or when the melt transport device is filled for the first time already pre-tempered surfaces.
  • Oxide formation can be achieved by reducing the local cooling of the melt.
  • an improvement in the melt quality can be achieved, since aluminum melts are particularly prone to forming an oxide skin when cooled locally.
  • the melt transport device has a melt container with a melt receiving space and a spout in the form of a lance lying underneath the melt container, the spout having a pouring opening which is fluidly connected to the melt receiving space and the coupling of the preheating station being designed such that in coupled state of the preheating station and the melt transport device, the melt receiving space is fluidly connected to the flow channel.
  • a melt transport device designed in this way improved heating of the melt transport device can be achieved by the preheating station.
  • An improved casting result can therefore be achieved with a melt transport device designed in this way.
  • the quality of the casting result can be improved, particularly when casting molten aluminum.
  • the coupling of the preheating station is designed such that when the preheating station and the melt transport device are coupled, the heated air volume is introduced into the melt receiving space via the lance located below.
  • the melt transport device has a vacuum pump, by means of which a negative pressure can be applied in the melt receiving space during operation of the melt transport device in order to be able to take up a melt into the melt receiving space or to release it in a targeted manner.
  • a vacuum pump it can be provided that a free outflow line for the heated air is designed in the form of a chimney.
  • a shut-off device is arranged in the chimney.
  • the second temperature sensor it is possible for the second temperature sensor to be accommodated in the melt receiving space of the melt transport device. This has the advantage that not only the initial temperature of the preheating station can be detected, but also that the actual temperature in the melt transport device can be detected. The desired or targeted temperature in the melt transport device can thus be set with increased accuracy.
  • the second temperature sensor is arranged in the melt receiving space above a filling level maximum.
  • contamination of the second temperature sensor by melt can be largely prevented, whereby the service life of the second temperature sensor can be increased.
  • the second temperature sensor is protected at the bottom by a splash plate.
  • the preheating station includes:
  • the process includes the following steps:
  • the method according to the invention has the advantage that a melt receiving space of the melt transport device can be brought to a sufficiently high temperature so that when the melt transport device is started up or when the melt transport device is filled for the first time, the melt hits surfaces that have already been pre-tempered. This means that oxide formation can be largely prevented when the melt is absorbed. Oxide formation can be achieved by reducing the local cooling of the melt. In particular with aluminum melts, an improvement in the melt quality can be achieved, since aluminum melts are particularly prone to forming an oxide skin when cooled locally.
  • the air volume is heated to a temperature between 700°C and 1100°C, in particular between 800°C and 1000°C, preferably between 850°C and 950°C.
  • a temperature between 700°C and 1100°C in particular between 800°C and 1000°C, preferably between 850°C and 950°C.
  • the air volume is conveyed into the melt transport device until a temperature in a melt receiving space of the melt transport device is between 200 ° C and 450 ° C, in particular between 250 ° C and 420 ° C, preferably between 300 ° C and 390 °C is reached and that in a subsequent process step the melt transport device is used to cast a workpiece.
  • a temperature between 340 °C and 360 °C can be aimed for in the melt receiving space.
  • a melt transport device pre-tempered to this temperature has the advantage that oxide formation can be largely prevented when the melt is taken into the melt receiving space.
  • a first melt transport device is used for casting a workpiece, while a second melt transport device is heated by means of the preheating station and that in a subsequent process step first melt transport device is heated by means of the preheating station while the first melt transport device is used for casting a workpiece.
  • the preheating station has a first melt transport device receiving location and a second melt transport device receiving location, so that two melt transport devices can be heated simultaneously at the preheating station.
  • An embodiment is also advantageous, according to which it can be provided that at the same time as conveying the air volume into the melt transport device by means of the blower, a volume of air is sucked out of the melt receiving space of the melt transport device by means of a vacuum pump.
  • This has the advantage that continuous and uniform heating of the melt receiving space can be achieved.
  • a lance in the sense of this document is seen as a spout with a narrowed cross-section in relation to the melt container.
  • the lance is at least partially tubular.
  • FIG. 1 shows a first exemplary embodiment of a melt transport device
  • FIG. 2 shows a first exemplary embodiment of a preheating station for preheating the melt transport device
  • FIG. 3 shows a schematic representation of a first exemplary embodiment of a casting device comprising the preheating station with a melt transport device accommodated thereon; 4 shows a schematic representation of a second exemplary embodiment of a casting device comprising the preheating station with a melt transport device accommodated thereon;
  • FIG. 5 shows a schematic representation of a third exemplary embodiment of a casting device comprising the preheating station with a melt transport device accommodated thereon;
  • Fig. 6 is a perspective view of an exemplary embodiment of a preheating station with two couplings for simultaneously receiving two melt transport devices.
  • Fig. 1 shows a first exemplary embodiment of a melt transport device 1, which is used to transport melt 2.
  • melt transport device 1 is only described to the extent that the features described are required for the description of the preheating station 12. With regard to a detailed description of the melt transport device 1 or design options for the melt transport device 1, reference is made to AT 523 252 A1, the content of which is hereby incorporated into this application.
  • the melt transport device 1 has a melt container 3, in which a melt receiving space 4 is formed, which serves to hold the melt 2.
  • the melt transport device 1 can include a spout 5, which is coupled to the melt container 3.
  • the spout 5 can be designed as an integral part of the melt container 3.
  • the spout 5 is designed as a separate component, which is coupled to the melt container 3.
  • the spout 5 can have a pouring opening 6, through which the melt 2 received in the melt container 3 can flow out of the melt transport device 1 into a mold or a filling chamber of an injection molding system.
  • the spout 5 is designed in the form of a lance 7.
  • a gas valve 8 can be formed, which is fluidly connected to the melt receiving space 4 and which is designed to regulate the gas entry into the otherwise gas-tight melt receiving space 4.
  • the gas valve 8 is arranged above a filling level maximum 9, so that no melt 2 can flow into the gas valve 8.
  • the maximum filling level is selected so that when the melt container 3 is filled with melt 2 up to the maximum filling level 9, a gas-filled space remains in the melt receiving space 4, in which a pressure can be adjusted using the gas valve 8.
  • the melt transport device 1 has a siphon 10.
  • the siphon 10 is arranged on the underside of the lance 7.
  • the siphon 10 is integrated directly into the lance 7.
  • a siphon 10 integrated into the lance 7 can work according to the same operating principle as described here.
  • melt container 3 is shown partially filled with melt 2.
  • the melt transport device 1 has a vacuum pump 11 or is coupled to a vacuum pump 11. Using the vacuum pump 11, a volume of air can be sucked out of the melt receiving space 4. As a result, a negative pressure can be generated in the melt receiving space 4 during operation of the melt transport device 1.
  • FIG. 2 shows a first exemplary embodiment of a preheating station 12 for preheating the melt transport device 1.
  • the preheating station 12 includes a base assembly 13, which can be used to accommodate the individual components of the preheating station 12.
  • the base assembly 13 can also be referred to as a frame or support frame.
  • the base assembly 13 is formed by an assembly of several steel profiles or steel components.
  • a flow channel 14 is designed to transport a volume of air.
  • the flow channel 14 can be attached or held on the base assembly 13.
  • the flow channel 14 is formed by a steel pipe.
  • the flow channel 14 is covered by insulation 15.
  • the insulation 15 can be designed, for example, in the form of a ceramic fiber mat.
  • a coupling 16 is formed, which serves to couple the melt transport device 1 to the base assembly 13.
  • the coupling 16 can serve to couple the melt transport device 1 to the flow channel 14.
  • a flow connection between the flow channel 14 and the melt transport device 1 can thus be established by means of the coupling 16.
  • a flow connection can be established between the flow channel 14 and the melt receiving space 4 of the melt transport device 1.
  • the clutch 16 comprises a first clutch part 17 and a second clutch part 18.
  • the first coupling part 17 and the second coupling part 18 can be arranged at a distance from one another.
  • the first coupling part 17 serves to transfer the load or to stabilize the melt transport device 1.
  • the second coupling part 18 serves to produce a tight connection between the melt transport device 1 and the flow channel 14 of the preheating station 12.
  • the second coupling part 18 is designed in the form of a flange, which is arranged on an end face of the flow channel 14.
  • the second coupling part 18 can include a seal 19, which is intended to rest on the melt transport device 1 and thus to produce a flow-tight seal Connection between the flow channel 14 and the melt transport device 1 is used.
  • the seal 19 is designed in the form of a ceramic sealing cord.
  • the seal 19 is designed to rest on a bottom of the melt transport device 1.
  • the seal 19 can rest on the bottom of the melt transport device 1 surrounding the lance 7.
  • an air heater 20 is arranged in the area of the flow channel 14.
  • a blower 21 is designed, which serves to convey the air volume in the flow channel 14. By means of the blower 21, the air volume in the flow channel can be conveyed in a flow direction 22.
  • Fig. 3 shows a highly simplified, schematic representation of a casting device 23, with the same reference numbers or component names being used for the same parts as in the previous Figures 1 and 2. In order to avoid unnecessary repetitions, reference is made to the detailed description in the previous Figures 1 and 2.
  • the casting device 23 can include the melt transport device 1 and the preheating station 12. Furthermore, it can be provided that the casting device 23 comprises a computing unit 24, which is designed to control a process for preheating the melt transport device 1 or for controlling a process for casting a workpiece.
  • a temperature sensor 25 is arranged in the flow channel 14, which is designed to detect the temperature in the flow channel 14.
  • a second temperature sensor 26 can be provided, which is arranged in the melt transport device 1.
  • the second temperature sensor 26 is arranged in the melt receiving space 4 of the melt transport device 1.
  • the second temperature sensor 26 is arranged above the filling level maximum 9 in the melt receiving space 4.
  • the melt transport device 1 is coupled to the preheating station 12, whereby a flow connection between the flow channel 14 and the melt receiving space 4 is established.
  • an underside of the melt container 3 rests on the seal 19 of the second coupling part 18, whereby a tight connection is established between the melt receiving space 4 and the flow channel 14.
  • a volume of air is sucked in by the blower 21 and blown into the flow channel 14.
  • the air volume can be heated to a desired temperature using the air heater 20.
  • the heated air volume can then be guided through the lance 7 into the melt receiving space 4.
  • the heated air volume can then be blown out of the melt receiving space 4 again by the pressure of the blower 21.
  • the vacuum pump 11 can be used to convey the air volume from the melt receiving space 4.
  • FIG. 4 shows a further and possibly independent embodiment of the casting device 23, with the same reference numbers or component names being used for the same parts as in the previous FIGS. 1 to 3. In order to avoid unnecessary repetitions, reference is made to the detailed description in the previous Figures 1 to 3.
  • a return channel 27 is formed, by means of which at least parts of the exhaust air flow from the melt transport device 1 can be returned to the flow channel 14.
  • the return channel 27 is designed such that the air conveyed from the melt receiving space 4 is completely returned to the flow channel 14. This means the air can be circulated. It may be necessary here for the air guided via the return channel 27 to be guided through the blower 21.
  • FIG. 5 shows a further and possibly independent embodiment of the casting device 23, with the same reference numbers or component names being used for the same parts as in the previous FIGS. 1 to 4.
  • the same reference numbers or component names being used for the same parts as in the previous FIGS. 1 to 4.
  • Fig. 5 shows a further exemplary embodiment of the casting device 23. As can be seen from Fig. 5, it can be provided that a heat exchanger 28 is arranged on the flow channel 14.
  • the heat exchanger 28 can be coupled to an exhaust air duct 29 for conveying the exhaust air flow from the melt transport device 1.
  • All information on value ranges in this description should be understood to include any and all sub-ranges, e.g. the information 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10 , i.e. all subranges start with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

L'invention concerne une station de préchauffage (12) pour préchauffer un dispositif de transport de matière fondue (1), ladite station de préchauffage (12) comprenant : un ensemble de base (13) ; un canal d'écoulement (14) pour le transport d'un volume d'air, le canal d'écoulement (14) étant disposé sur l'ensemble de base (13) ; un couplage (16) pour coupler le dispositif de transport de matière fondue (1) à l'ensemble de base (13), le couplage (16) étant conçu pour produire une liaison fluidique entre le canal d'écoulement (14) et le dispositif de transport de matière fondue (1) ; un dispositif de chauffage d'air (20) pour chauffer le volume d'air, le dispositif de chauffage d'air (20) étant couplé au canal d'écoulement (14) ; un ventilateur (21) pour transporter le volume d'air dans le canal d'écoulement (14) dans une direction d'écoulement (22).
PCT/AT2023/060153 2022-05-10 2023-05-10 Station de préchauffage pour préchauffer un dispositif de transport de matière fondue WO2023215928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50328/2022A AT526114B1 (de) 2022-05-10 2022-05-10 Vorheizstation zum Vorheizen einer Schmelzetransportvorrichtung
ATA50328/2022 2022-05-10

Publications (1)

Publication Number Publication Date
WO2023215928A1 true WO2023215928A1 (fr) 2023-11-16

Family

ID=86605212

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2023/060153 WO2023215928A1 (fr) 2022-05-10 2023-05-10 Station de préchauffage pour préchauffer un dispositif de transport de matière fondue

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Country Link
AT (1) AT526114B1 (fr)
WO (1) WO2023215928A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359209A (en) * 1982-01-06 1982-11-16 Bloom Engineering Co., Inc. Hot air ladle preheat station and method
CA1137302A (fr) * 1979-03-21 1982-12-14 Donald D. Battles Systeme chauffant pour poche de coulee
US20120146267A1 (en) * 2007-06-11 2012-06-14 Nucor Corporation Preheaters for preheating steelmaking ladles
CN108655384A (zh) * 2017-03-29 2018-10-16 上海安可科技股份有限公司 钢包烘烤器
AT523252A1 (de) 2019-12-13 2021-06-15 Fill Gmbh Gießvorrichtung umfassend eine Schmelzetransportvorrichtung mit zumindest einem Schmelzebehälter
CN113547110A (zh) * 2021-06-29 2021-10-26 洛阳盛鑫工矿设备有限公司 一种烘烤炉自动控制系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61219452A (ja) * 1985-03-27 1986-09-29 Nippon Kokan Kk <Nkk> 吸引式タンデイツシユノズルの予熱方法
CN111578747A (zh) * 2020-06-10 2020-08-25 苏州仓松金属制品有限公司 一种节能降耗预热式烤包装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1137302A (fr) * 1979-03-21 1982-12-14 Donald D. Battles Systeme chauffant pour poche de coulee
US4359209A (en) * 1982-01-06 1982-11-16 Bloom Engineering Co., Inc. Hot air ladle preheat station and method
US20120146267A1 (en) * 2007-06-11 2012-06-14 Nucor Corporation Preheaters for preheating steelmaking ladles
CN108655384A (zh) * 2017-03-29 2018-10-16 上海安可科技股份有限公司 钢包烘烤器
AT523252A1 (de) 2019-12-13 2021-06-15 Fill Gmbh Gießvorrichtung umfassend eine Schmelzetransportvorrichtung mit zumindest einem Schmelzebehälter
CN113547110A (zh) * 2021-06-29 2021-10-26 洛阳盛鑫工矿设备有限公司 一种烘烤炉自动控制系统

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AT526114B1 (de) 2024-06-15
AT526114A1 (de) 2023-11-15

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