CA2355275A1 - Method for detecting and controlling the level of liquid metal in an ingot mold - Google Patents
Method for detecting and controlling the level of liquid metal in an ingot mold Download PDFInfo
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- CA2355275A1 CA2355275A1 CA002355275A CA2355275A CA2355275A1 CA 2355275 A1 CA2355275 A1 CA 2355275A1 CA 002355275 A CA002355275 A CA 002355275A CA 2355275 A CA2355275 A CA 2355275A CA 2355275 A1 CA2355275 A1 CA 2355275A1
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- Prior art keywords
- level
- mold
- actuator
- computer
- measuring head
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/165—Controlling or regulating processes or operations for the supply of casting powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/245—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid with a probe moved by an auxiliary power, e.g. meter, to follow automatically the level
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Continuous Casting (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to a method and a device for detecting and controlling the level of molten metal located in an ingot mold, especially for a continuous casting installation for steel. Said molten metal can be delivered from a feed vessel comprising a closeable bottom opening to the ingot mold via an immersion tube. The level of the liquid metal is detected and controlled using a measuring element which can be inserted into the free space of the ingot mold in a vertically displaceable manner. The level measuring element (42) is connected via a first signal line (31) to a computer (41) which is connected via a first control line (51) to a first actuator (61) on which an extension arm (71) is fastened. The level measuring element (42) is attached to the top end of said extension arm. A position sensor (43) is provided on the extension arm (71) and is connected via a second signal line (32) to the computer (41) which is connected via a second control line (52) to a second actuator (62) that is linked to an obturator (81) for closing the bottom opening (12) of the feed vessel (11).
Description
TRANSLATION (5095-40PUS):
WO 00/38,858 PCT/DE99/04,114 METHOD FOR DETECTING AND REGULATING THE LEVEL OF LIQUID
METAL IN A MOLD
The invention pertains to a method for detecting and regulating the level of liquid metal in the mold of a continuous casting machine, especially for steel, with a measuring head installed above the molten metal, which is used to measure the distance between said measuring head and the surface of the bath, and with an appropriate device for implementing this method.
Ever increasing requirements are being imposed on the measurement of the level of the liquid metal in molds, especially in the molds used in thin-slab continuous casting machines. At strand withdrawal rates of 4-6 m/min, the measurement error in such systems must be extremely small and the signals must be processed as quickly as possible.
EP 0,150,670 describes a method and a device in which eddy currents induced in the molten metal by a measuring coil are used as a measure of the distance between the measuring coil and the molten metal, where the magnitude of the eddy currents on the surface of the molten metal is compared with a nominal value, and where the feed rate of the molten metal is automatically adjusted in accordance with the difference between the nominal value and the actual value. In the known device, the measuring coil is attached to a guide tube, which can be designed so that it can be raised and lowered. A distance of approximately 20 mm between the measuring head and the molten metal is stated as being optimum. If it should prove necessary later on to lower the level of the metal, the guide tube carrying the measuring head can be lowered to follow the metal. The disadvantage of this known device is the nonlinear measurement. When the level of the metal changes during the casting process, the impedance in the measuring coil changes also, because the eddy currents induced in the measurement object cause ohmic losses. The value of this impe-dance variation is sent via an electronic unit to a control system, which is connected to a unit for adjusting the flow rate of the molten metal passing through a discharge pipe.
Radioactive measuring devices are also known, in which, for example, Cos° is used as the radioactive source for irradiating the mold. The inten-sity of the radiation, which is a function of the level of the molten metal in the mold, is measured on the opposite side.
In addition to a relatively high mean error rate as a result of statisti-cal variations in the rate of decay of the radioactive source, the particular disadvantage of this method is and remains the ever more burdensome legal reg-ulations which must be followed when radioactive materials are used.
The goal of the invention is to avoid the disadvantages mentioned above and to create a method and a device for detecting and regulating the level of liquid metal in a mold, the device being easy to maintain, capable of deter-mining the level with precision while using all necessary measurement lengths, and capable of adjusting quickly and reliably to changes in the level.
Another goal is to make it possible to measure the thickness of the cast-ing flux.
The invention achieves these goals by means of the characterizing fea-tunes of Method Claim 1 and of Device Claim 4.
According to the invention, the distance between a measuring head pro-jecting into the mold and the surface of the bath is detected and kept con-stant in that an actuator, which is installed outside the mold and connected by connecting means to the measuring head, changes the vertical position of the head. At the same time, the current position of the connecting means between the actuator and the measuring head is also detected and sent to a computer. The control data prepared by the computer are sent to a second actuator, which is connected to a shut-off element for adjusting the feed rate of the liquid metal entering the mold.
Because the distance between the measuring head and the surface of the bath does not change, the impedance in the measuring coil does not change either, which means that the measurement errors such changes cause do not occur.
The connecting means extending out from the mold is easy to detect with appropriate instruments, so that the feed rate of liquid metal to the mold can be adjusted with high precision and especially at high speed by the second actuator connected to the shut-off element.
Because the measuring head for detecting the distance to the level of molten metal is always kept at the same distance, it is easy at the same time to determine and also to regulate the depth of the casting flux on the surface of the metal bath.
In advantageous embodiments, it is proposed that the actuator be moved horizontally or vertically or rotated to detect change in the vertical posi-tion of the measuring head in the mold. The connecting element between the actuator and the measurement sensor can be a rod or a chain or cable. All these elements are able to withstand the extremely harsh atmosphere around the stationary mold of a continuous casting machine In a further embodiment, it is proposed that a thickness measuring sensor for detecting the thickness of the casting flux be installed in the same posi-Lion as the measuring element, designed as an inductive component, used for detecting the distance between the measuring head and the molten metal sur-face. The casting flux thickness sensor is designed as an ultrasound device.
The layer thickness sensor is connected by a third signal line to a computer, which is connected by a third control line to a third actuator, which is linked in turn to a shut-off element for adjusting the flow rate of the cast-ing flux.
An example of the invention is shown in the attached drawing:
- Figure 1 shows a diagram of a device for detecting and regulating the level in a mold;
- Figure 2 shows a rotary actuator, which is connected by a swivelling cam [sic? -- Tr. Ed.] to the measuring head;
- Figure 3 shows a horizontally movable first actuator, which is con-nected by a cable to the measuring head; and - Figure 4 shows a measuring unit for detecting the level and the thick-ness of the casting flux.
Figure 1 shows a feed vessel 11, in which the melt S is held. The feed vessel 11 has a bottom opening 12, at which an immersion casting pipe is pro-vided.
This immersion casting pipe 13 projects into a stationary mold 21. The melt S is present in the mold; the surface of the bath is covered by casting flux G.
A support rod 74 projects into the mold; a level indicator 42 is attached to the head end of this rod. Support rod 74, a support arm 73, and a support column 72 form a complete bracket system 71. The support column 72 is designed as the piston of a first actuator 64. The support column 72 can be moved vertically and can also be rotated. This rotation is required so that the level indicator 42 can be moved away from or toward the mold 21.
The level indicator 42 is connected by a first signal line 31 to a com-puter 41. This computer 41 is connected by a first control line 51 to a first actuator 61, which controls the lifting unit 64 [sic -- Tr. Ed.].
A position measuring sensor 43 is mounted on the bracket system 71; this sensor is connected by a second signal line 32 to the computer 41, which is connected to and thus controls a second actuator 62. This second actuator controls a second lifting unit 68, which is connected by a bracket 69 to a shut-off element 81, designed here as a stopper [numbers 68 and 69 are not entered, but the parts they identify are clear in Figure 1 -- Tr. Ed.].
Figure 2 shows a first actuator 61, which is connected by a swivelling arm 75 and a joint 76 to a support rod 74. The level indicator 42, which can be adjusted to remain the same distance away from the bath surface in the mold 21 at all times, is attached to the end of the support rod 74.
The actuator 61 is attached to a rotation unit 65, by means of which, as the need arises, the level indicator 42 can be moved away from or toward the mold.
In Figure 3, the first actuator 61 is designed as a traction unit 67, which is mounted on a traveling device 77, at the head end of which a pulley 78 is mounted. A cable 79, one end of which is attached to the traction unit 67, the other end to the level indicator 42, is guided over this pulley 78.
The level indicator 42 attached to the cable 79 projects into the mold 21.
The level indicator 42 can be moved to the space above the mold 21 simply by raising it with the traction unit 67, and then it can be transported away to a resting or repair position by the movement of the traveling device 77.
Figure 4 shows a level indicator 42 with all the elements already described in Figure 1. The only difference here is that, instead of a stopper 82 to adjust the feed rate of molten metal S, a slide valve 83 is provided.
A layer thickness measuring sensor 44 is also provided in Figure 4 to supplement the level indicator 42 shown in Figure 1. The layer thickness sensor 44 for detecting the thickness of the layer of casting flux G on the surface of the bath is connected by a third signal line 33 to the computer 41, which is connected by a third control line 53 to a third actuator 63 and thus controls it. The third actuator 63 acts on a slide valve 84 for the casting flux G, which is held in a bin which can be moved up to the mold.
List of Items For Feeding 11 feed vessel 12 bottom opening 13 immersion casting pipe For Casting 21 mold For Measuring 31 first signal line (42) 32 second signal line (71) 33 third signal line For Regulation 41 computer 42 level indicator 43 position sensor 44 layer thickness sensor For Control 51 first control line For Adjustment 61 first actuator 62 second actuator 63 third actuator 64 lifting unit 65 rotating unit 67 traction unit For Attachment 71 bracket system 72 support column 73 support arm 74 support rod 75 swivelling arm 76 j o int 77 traveling device 78 pulley 79 chain, cable For Shutting Off 8I shut-off element 82 stopper 83 slide valve (13) 84 slide valve for casting flux S melt G casting flux
WO 00/38,858 PCT/DE99/04,114 METHOD FOR DETECTING AND REGULATING THE LEVEL OF LIQUID
METAL IN A MOLD
The invention pertains to a method for detecting and regulating the level of liquid metal in the mold of a continuous casting machine, especially for steel, with a measuring head installed above the molten metal, which is used to measure the distance between said measuring head and the surface of the bath, and with an appropriate device for implementing this method.
Ever increasing requirements are being imposed on the measurement of the level of the liquid metal in molds, especially in the molds used in thin-slab continuous casting machines. At strand withdrawal rates of 4-6 m/min, the measurement error in such systems must be extremely small and the signals must be processed as quickly as possible.
EP 0,150,670 describes a method and a device in which eddy currents induced in the molten metal by a measuring coil are used as a measure of the distance between the measuring coil and the molten metal, where the magnitude of the eddy currents on the surface of the molten metal is compared with a nominal value, and where the feed rate of the molten metal is automatically adjusted in accordance with the difference between the nominal value and the actual value. In the known device, the measuring coil is attached to a guide tube, which can be designed so that it can be raised and lowered. A distance of approximately 20 mm between the measuring head and the molten metal is stated as being optimum. If it should prove necessary later on to lower the level of the metal, the guide tube carrying the measuring head can be lowered to follow the metal. The disadvantage of this known device is the nonlinear measurement. When the level of the metal changes during the casting process, the impedance in the measuring coil changes also, because the eddy currents induced in the measurement object cause ohmic losses. The value of this impe-dance variation is sent via an electronic unit to a control system, which is connected to a unit for adjusting the flow rate of the molten metal passing through a discharge pipe.
Radioactive measuring devices are also known, in which, for example, Cos° is used as the radioactive source for irradiating the mold. The inten-sity of the radiation, which is a function of the level of the molten metal in the mold, is measured on the opposite side.
In addition to a relatively high mean error rate as a result of statisti-cal variations in the rate of decay of the radioactive source, the particular disadvantage of this method is and remains the ever more burdensome legal reg-ulations which must be followed when radioactive materials are used.
The goal of the invention is to avoid the disadvantages mentioned above and to create a method and a device for detecting and regulating the level of liquid metal in a mold, the device being easy to maintain, capable of deter-mining the level with precision while using all necessary measurement lengths, and capable of adjusting quickly and reliably to changes in the level.
Another goal is to make it possible to measure the thickness of the cast-ing flux.
The invention achieves these goals by means of the characterizing fea-tunes of Method Claim 1 and of Device Claim 4.
According to the invention, the distance between a measuring head pro-jecting into the mold and the surface of the bath is detected and kept con-stant in that an actuator, which is installed outside the mold and connected by connecting means to the measuring head, changes the vertical position of the head. At the same time, the current position of the connecting means between the actuator and the measuring head is also detected and sent to a computer. The control data prepared by the computer are sent to a second actuator, which is connected to a shut-off element for adjusting the feed rate of the liquid metal entering the mold.
Because the distance between the measuring head and the surface of the bath does not change, the impedance in the measuring coil does not change either, which means that the measurement errors such changes cause do not occur.
The connecting means extending out from the mold is easy to detect with appropriate instruments, so that the feed rate of liquid metal to the mold can be adjusted with high precision and especially at high speed by the second actuator connected to the shut-off element.
Because the measuring head for detecting the distance to the level of molten metal is always kept at the same distance, it is easy at the same time to determine and also to regulate the depth of the casting flux on the surface of the metal bath.
In advantageous embodiments, it is proposed that the actuator be moved horizontally or vertically or rotated to detect change in the vertical posi-tion of the measuring head in the mold. The connecting element between the actuator and the measurement sensor can be a rod or a chain or cable. All these elements are able to withstand the extremely harsh atmosphere around the stationary mold of a continuous casting machine In a further embodiment, it is proposed that a thickness measuring sensor for detecting the thickness of the casting flux be installed in the same posi-Lion as the measuring element, designed as an inductive component, used for detecting the distance between the measuring head and the molten metal sur-face. The casting flux thickness sensor is designed as an ultrasound device.
The layer thickness sensor is connected by a third signal line to a computer, which is connected by a third control line to a third actuator, which is linked in turn to a shut-off element for adjusting the flow rate of the cast-ing flux.
An example of the invention is shown in the attached drawing:
- Figure 1 shows a diagram of a device for detecting and regulating the level in a mold;
- Figure 2 shows a rotary actuator, which is connected by a swivelling cam [sic? -- Tr. Ed.] to the measuring head;
- Figure 3 shows a horizontally movable first actuator, which is con-nected by a cable to the measuring head; and - Figure 4 shows a measuring unit for detecting the level and the thick-ness of the casting flux.
Figure 1 shows a feed vessel 11, in which the melt S is held. The feed vessel 11 has a bottom opening 12, at which an immersion casting pipe is pro-vided.
This immersion casting pipe 13 projects into a stationary mold 21. The melt S is present in the mold; the surface of the bath is covered by casting flux G.
A support rod 74 projects into the mold; a level indicator 42 is attached to the head end of this rod. Support rod 74, a support arm 73, and a support column 72 form a complete bracket system 71. The support column 72 is designed as the piston of a first actuator 64. The support column 72 can be moved vertically and can also be rotated. This rotation is required so that the level indicator 42 can be moved away from or toward the mold 21.
The level indicator 42 is connected by a first signal line 31 to a com-puter 41. This computer 41 is connected by a first control line 51 to a first actuator 61, which controls the lifting unit 64 [sic -- Tr. Ed.].
A position measuring sensor 43 is mounted on the bracket system 71; this sensor is connected by a second signal line 32 to the computer 41, which is connected to and thus controls a second actuator 62. This second actuator controls a second lifting unit 68, which is connected by a bracket 69 to a shut-off element 81, designed here as a stopper [numbers 68 and 69 are not entered, but the parts they identify are clear in Figure 1 -- Tr. Ed.].
Figure 2 shows a first actuator 61, which is connected by a swivelling arm 75 and a joint 76 to a support rod 74. The level indicator 42, which can be adjusted to remain the same distance away from the bath surface in the mold 21 at all times, is attached to the end of the support rod 74.
The actuator 61 is attached to a rotation unit 65, by means of which, as the need arises, the level indicator 42 can be moved away from or toward the mold.
In Figure 3, the first actuator 61 is designed as a traction unit 67, which is mounted on a traveling device 77, at the head end of which a pulley 78 is mounted. A cable 79, one end of which is attached to the traction unit 67, the other end to the level indicator 42, is guided over this pulley 78.
The level indicator 42 attached to the cable 79 projects into the mold 21.
The level indicator 42 can be moved to the space above the mold 21 simply by raising it with the traction unit 67, and then it can be transported away to a resting or repair position by the movement of the traveling device 77.
Figure 4 shows a level indicator 42 with all the elements already described in Figure 1. The only difference here is that, instead of a stopper 82 to adjust the feed rate of molten metal S, a slide valve 83 is provided.
A layer thickness measuring sensor 44 is also provided in Figure 4 to supplement the level indicator 42 shown in Figure 1. The layer thickness sensor 44 for detecting the thickness of the layer of casting flux G on the surface of the bath is connected by a third signal line 33 to the computer 41, which is connected by a third control line 53 to a third actuator 63 and thus controls it. The third actuator 63 acts on a slide valve 84 for the casting flux G, which is held in a bin which can be moved up to the mold.
List of Items For Feeding 11 feed vessel 12 bottom opening 13 immersion casting pipe For Casting 21 mold For Measuring 31 first signal line (42) 32 second signal line (71) 33 third signal line For Regulation 41 computer 42 level indicator 43 position sensor 44 layer thickness sensor For Control 51 first control line For Adjustment 61 first actuator 62 second actuator 63 third actuator 64 lifting unit 65 rotating unit 67 traction unit For Attachment 71 bracket system 72 support column 73 support arm 74 support rod 75 swivelling arm 76 j o int 77 traveling device 78 pulley 79 chain, cable For Shutting Off 8I shut-off element 82 stopper 83 slide valve (13) 84 slide valve for casting flux S melt G casting flux
Claims (11)
1. Method for detecting and regulating the level of liquid metal in a mold of a continuous casting machine, especially for steel, with a measuring head held above the molten metal, by means of which the distance between the head and the surface of the bath is determined, characterized by the following steps:
(a) before casting begins, the measuring head, held by a bracket mounted independently outside the mold, is introduced by the use of a connecting means into the free space of the mold;
(b) as the mold begins to fill with the molten metal, any change in a predetermined distance between the surface of the metal bath and the measuring head is detected;
(c) the measurement values are sent to a computer set up outside in a safe place;
(d) control data prepared by this computer are sent to an actuator attached to the bracket, so that the actuator can change the vertical position of the measuring head in such a way that the desired distance to the bath is restored whenever there is any change in the level of the melt;
(e) the current position of the connecting means between the measuring head and the first actuator is sent to the computer; and (f) the control data prepared by the computer are sent to a second actu-ator, which is itself connected to a shut-off element for adjusting the feed rate of the liquid metal into the mold.
(a) before casting begins, the measuring head, held by a bracket mounted independently outside the mold, is introduced by the use of a connecting means into the free space of the mold;
(b) as the mold begins to fill with the molten metal, any change in a predetermined distance between the surface of the metal bath and the measuring head is detected;
(c) the measurement values are sent to a computer set up outside in a safe place;
(d) control data prepared by this computer are sent to an actuator attached to the bracket, so that the actuator can change the vertical position of the measuring head in such a way that the desired distance to the bath is restored whenever there is any change in the level of the melt;
(e) the current position of the connecting means between the measuring head and the first actuator is sent to the computer; and (f) the control data prepared by the computer are sent to a second actu-ator, which is itself connected to a shut-off element for adjusting the feed rate of the liquid metal into the mold.
2. Method according to Claim 1, characterized in that the first actuator connected to the measuring head can be moved vertically or horizontally or rotated in order to change the vertical position of the measuring head in the mold.
3. Method according to Claim 1, characterized in that, in addition to the level of the liquid metal, the depth of the casting flux on the surface of the metal bath is also controlled.
4. Device for detecting and regulating the level of the molten metal in a mold, especially for a continuous casting machine for steel, which molten metal can be supplied to the mold via an immersion pipe from a feed vessel with a closable bottom opening, which device has a measuring element which can be introduced into and moved vertically in the free space of the mold, characterized in that the level measuring element (42) is connected by a first signal line (31) to a computer (41), which is connected by a first con-trol line (51) to a first actuator (61), to which a bracket system (71) is attached, to the end of which the level measuring element (42) is fastened; in that, on the bracket system (71), a position sensor (43) is provided, which is connected by a second signal line (32) to the computer (41), which is con-nected by a second control line (52) to a second actuator (62), which is itself linked to a shut-off element (81) for closing the bottom opening (12) of the feed vessel (11).
5. Device according to Claim 4, characterized in that the bracket system is made up of a support column (72) connected to a lifting unit (64), a sup-port rod (74) parallel to the column, the level measuring element (52) being attached to the end of this rod, and a support arm (73), which connects the support column (72) to the support rod (74).
6. Device according to Claim 4, characterized in that the bracket system (71) consists of a swivelling arm (75), connected to a swivelling unit (45), the swivelling arm being provided at the end with a joint (76), which is con-nected to a support rod (74), to the end of which the level measuring element (42) is attached.
7. Device according to Claim 5 or Claim 6, characterized in that a rotating device (66) [does not appear in the figures -- Tr. Ed.] is provided, to which the lifting (64) or swivelling unit (65) for swinging the level meas-uring element (42) in or out of the free space of the mold (21) is connected.
8. Device according to Claim 4, characterized in that the bracket system (71) is rigidly connected to a traveling device (77) and has a pulley (78) at the end, over which a cable or a chain (79) can be guided, to one end of which the level measuring element (42) is connected, whereas a traction unit (67) is connected to the other end.
9. Device according to one of Claims 4-8, characterized in that the level measuring element (42), which has an inductive component for detecting the distance between the measuring head and the surface of the molten metal, and also a layer thickness measuring sensor (44) for detecting the thickness of the layer of casting flux (G) are attached to the bracket system (71).
10. Device according to Claim 9, characterized in that the layer thickness sensor (44) is an ultrasound device, by means of which the distance between it and the surface of the casting flux can be detected.
11. Device according to Claim 10 or Claim 9, characterized in that the layer thickness sensor (44) is connected by a third signal line (33) to the computer (41), which is connected by a third control line (53) to a third actuator (63), which is linked to a shut-off element (84) for adjusting the feed of the casting flux.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19860752.0 | 1998-12-23 | ||
| DE19860752 | 1998-12-23 | ||
| DE19918835A DE19918835A1 (en) | 1998-12-23 | 1999-04-20 | Method for detecting and regulating the level of the liquid metal in a mold |
| DE19918835.1 | 1999-04-20 | ||
| PCT/DE1999/004114 WO2000038858A1 (en) | 1998-12-23 | 1999-12-22 | Method for detecting and controlling the level of liquid metal in an ingot mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2355275A1 true CA2355275A1 (en) | 2000-07-06 |
Family
ID=26051131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002355275A Abandoned CA2355275A1 (en) | 1998-12-23 | 1999-12-22 | Method for detecting and controlling the level of liquid metal in an ingot mold |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1152850A1 (en) |
| JP (1) | JP2002533221A (en) |
| CN (1) | CN1331617A (en) |
| AU (1) | AU2429300A (en) |
| BR (1) | BR9916554A (en) |
| CA (1) | CA2355275A1 (en) |
| WO (1) | WO2000038858A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10324247A1 (en) * | 2003-05-28 | 2004-12-16 | Bayerische Motoren Werke Ag | Metal casting plant and process |
| KR101382785B1 (en) * | 2007-12-27 | 2014-04-08 | 주식회사 포스코 | Method for controlling the solidification structure of steel using the input of ultrasonic |
| CN100569416C (en) * | 2008-03-18 | 2009-12-16 | 中南大学 | A kind of constant fluid level control device of fused mass box for casting |
| ES2526868T3 (en) | 2008-10-14 | 2015-01-16 | Invista Technologies S.À.R.L. | Preparation procedure for 2-alkyl-secondary-4,5-di- (alkylnormal) phenols |
| DE102011085932A1 (en) * | 2011-06-07 | 2012-12-13 | Sms Siemag Ag | Method for regulating the height of the casting mirror in a mold of a continuous casting plant |
| CN103447487A (en) * | 2013-07-29 | 2013-12-18 | 山西太钢不锈钢股份有限公司 | Casting method |
| CN104439144B (en) * | 2014-12-19 | 2017-02-22 | 山东钢铁股份有限公司 | Steel billet solidification detection system and method based on ultrasonic waves |
| CN104568049B (en) * | 2015-02-04 | 2018-04-06 | 济南大学 | A kind of rotatable contactless water-level gauge vertical rod |
| CN104722723A (en) * | 2015-04-09 | 2015-06-24 | 田陆 | Fixing device for sensor for molten molded steel liquid level detection |
| AT517889B1 (en) * | 2015-10-28 | 2017-09-15 | Primetals Technologies Austria GmbH | Detecting a level of pouring in a mold |
| CN109225590B (en) * | 2018-10-17 | 2023-10-20 | 中冶北方（大连）工程技术有限公司 | Device and method for detecting chute material level of pellet high-pressure roller mill |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376926A (en) * | 1976-12-21 | 1978-07-07 | Nippon Kokan Kk | Molten metal level monitor controller of continuous casting machine that use eddy flow system range finder for measurement of molten metal level |
| US4470446A (en) * | 1980-07-09 | 1984-09-11 | Kabushiki Kaisha Kobe Seiko Sho | Method and apparatus for detecting molten metal surface level in a mold |
| AU529551B2 (en) * | 1981-06-11 | 1983-06-09 | Mishima Kosan Co., Ltd. | Molten metal level sensor |
| JPS62270263A (en) * | 1986-05-20 | 1987-11-24 | Mitsubishi Heavy Ind Ltd | Control device for powder charging quantity in continuous caster |
-
1999
- 1999-12-22 CA CA002355275A patent/CA2355275A1/en not_active Abandoned
- 1999-12-22 JP JP2000590798A patent/JP2002533221A/en active Pending
- 1999-12-22 AU AU24293/00A patent/AU2429300A/en not_active Abandoned
- 1999-12-22 BR BR9916554-6A patent/BR9916554A/en not_active Application Discontinuation
- 1999-12-22 WO PCT/DE1999/004114 patent/WO2000038858A1/en not_active Application Discontinuation
- 1999-12-22 EP EP99967918A patent/EP1152850A1/en not_active Withdrawn
- 1999-12-22 CN CN99814873A patent/CN1331617A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP1152850A1 (en) | 2001-11-14 |
| JP2002533221A (en) | 2002-10-08 |
| AU2429300A (en) | 2000-07-31 |
| CN1331617A (en) | 2002-01-16 |
| WO2000038858A1 (en) | 2000-07-06 |
| BR9916554A (en) | 2001-10-09 |
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