CA1265912A - Method of casting melt into a plurality of continuous casting moulds - Google Patents
Method of casting melt into a plurality of continuous casting mouldsInfo
- Publication number
- CA1265912A CA1265912A CA000516400A CA516400A CA1265912A CA 1265912 A CA1265912 A CA 1265912A CA 000516400 A CA000516400 A CA 000516400A CA 516400 A CA516400 A CA 516400A CA 1265912 A CA1265912 A CA 1265912A
- Authority
- CA
- Canada
- Prior art keywords
- filling level
- moulds
- threshold value
- predetermined threshold
- actual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
-
- 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
- B22D11/14—Plants for continuous casting
- B22D11/147—Multi-strand plants
-
- 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
- B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
A B S T R A C T
The invention provides a method of pouring a molten metal from an intermediate vessel 3 into a plurality of con-tinuous casting moulds A, B, C through respective controllable discharge valves 4 and withdrawing all the resultant castings 18 from the moulds with common withdrawing means at the same speed. The method includes opening all the valves to initiate the pouring process; monitoring the filling level within each mould in a measuring zone; activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined threshold value within the measuring zone or on a first actual filling level reaching a second predeter-mined threshold value within the measuring zone above the first predetermined threshold value; and regulating each actual filling level to move from the first predetermined threshold value to a desired filling level at a predetermined rate.
The invention provides a method of pouring a molten metal from an intermediate vessel 3 into a plurality of con-tinuous casting moulds A, B, C through respective controllable discharge valves 4 and withdrawing all the resultant castings 18 from the moulds with common withdrawing means at the same speed. The method includes opening all the valves to initiate the pouring process; monitoring the filling level within each mould in a measuring zone; activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined threshold value within the measuring zone or on a first actual filling level reaching a second predeter-mined threshold value within the measuring zone above the first predetermined threshold value; and regulating each actual filling level to move from the first predetermined threshold value to a desired filling level at a predetermined rate.
Description
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The presen-t invention is a modi~ication of the invention described and claimed in Canadian patent application No.
489,950 filed on September 4, 1985 in the name of Metacon AG.
This invention relates, like that of the said Canadian patent application No. 489,950, to a method of casting or pouring a molten metal, in particular a steel melt, from an intermediate vessel into a plurality of continuous casting moulds, wherein the filling level of the melt in each mould is maintained, within a measuring zone, at a desired level by means of controllable discharge valves and the resultant continuous castings are withdrawn at the same speed by means of common withdrawing means.
The said Canadian patent application No. 489,950 proposes that, in such a method, when the discharge valves have been opened at the intermediate vessel for commencing the casting on process, the actual filling level which rises in each mould above a starting bar head effects, on its reachiny a first pre-determined threshold value or a first signal plane, located in the lower region of the measuring zone, throttling of its dis-charge valve in order to equaIize all of the actual filling levels and subsequently the actuation of the casting withdrawing drive. This actuation, in the event of the equalization not having taken place, is effected at the latest at a second pre-determined threshold value or a second signal plane located ~5 below a desired filling level and above the first signal plane, on the first actual filling level reaching the second signal plane. The casting on process performed at the same withdrawing speed is thereby improved, in particular concerning its opera-tional reliability, with simple procedural steps.
The present invention is a modification of a cas-ting-on process controlled within a filling level measuring zone in ~ continuous casting moulds by way of discharge valves, with - constant withdrawing speed. An object of the invention is the improvement of the casting-on process by reducing the casting-on time by means of simplified procedural steps.
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According to the present inventlon -there i5 hence provided a method of pouriny a molten metal from an in-ter-mediate vessel into a plurality of continuous castiny moulds through respective controllable discharge valves and with-drawing all the resultant castings from the moulds with cornmonwithdrawing means at the same speed, which includes opening all the valves to initiate the pouring process;
monitoring the filling level within each mould in a measuring zone;
activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined thres-hold value within the measuring zone or on a first actual filling level reaching a second predetermined value, within the measuring zone, above the first predetermined threshold value; and regulating each actual filling level to move, from the first predetermined threshold value to a desired filling level, at a predetermined rate.
In this manner the equalization of the actual filling levels of all the continuous casting moulds (at which equaliza-tion the invention of the said Canadian patent application No.
489,350 aims) is avoided and control of the actual filling level of each continuous casting mould can be introduced smoothly in a separate manner into the normal feed regulation of the desired filling level, the casting withdrawing means being suitably actuated at a filling level of at least one of the continuous casting moulds between the lower and the upper predetermined threshold values or signal planes of the measur-ing zone, which ensures reliable withdrawal of the continuous castings. The withdrawing means accoxdingly reacts upon that which occurs first during the rise of the actual filling levels in the continuous casting moulds. In other words, the withdraw-ing means switches on when the lower signal plane is exceeded by the last actual filling level or, if this does not occur, as soon as the first actual filling level has reached the upper signal plane. As in the invention of the said Canadian patent ; application No. 489,950, after the withdrawing means has been :.
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actuated, the discharge valves of those continuou~ casting moulds of which the actual filliny level is still located below the lower signal plane, close automatically.
For a particularly smooth and operationally reliable casting on, the present invention proposes that -the regulation of the discharge valves, which is initiated at the lower signal plane, is such that the predetermined rate is in a region above the congealing limit of the melt in the valves, on the one hand, and below the splashing limit of the melt over the mould edge on the transition to the regulation of the desired filling level, on the other hand, ie. it takes place along an ascending curve when the filling level (y-axis) is plotted against time (x-axis). With this process, the transition from rapid regula-tion alony the ascending curve, which is defined by rapid changes of the flow cross-section at the discharge valves, to relatively slow regulation of the desired filling level with relatively undisturbed residual casting mould bath level, can take place. Furthermore congealing which can occur in the discharge valves and impede the pouring stream of molten metal is substantially reduced. This counteraction is further assisted by pouring being effected with the discharge valves being throttled up to 50%. Those discharge valves which are the most remote from the feed point of the intermediate vessel, ie. the discharge valves associated with the outer casting moulds, are advantageously less throttled than those of the inner casting moulds. In this manner the lower temperatures of the melt which prevail in the outer regions of a continuous casting plant or of an intermediate vessel are effectively taken into acdount. There is furthermore the possibility of opening~the discharge valves fully ,in the event o~ the actual fiIling levels lagging during pouring below the lower signal plane, before regulating the levels along the ascending curve, in order to flush away congealing crusts.
The invention will now be described by way of example with reference to the accompanying drawings in which :: :
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FIGURE 1 is a diagrammatic view of a multiple con-tinuous-casting installation in a pouriny-on pos:ition; and FIGURES 2 and 3 diagrammatically illustrate different possible operational pouring sequences at pouriny on, ie. at commencement of pouring.
Reference numeral 1 in Figure 1 indicates a casting ladle from which steel melt is supplied via a controllable discharge valve 2 to an intermediate vessel 3 which, for its part, has three discharge valves in the form of sliding gate valves 4 which regulate the supply of melt through respective pouring channels or tubes 5 into three continuous casting moulds A, s, C. Each sliding gate valve 4 is mechanically coupled to an actuator or positioning member 6 whose operational position at any time is detected by a position indicator or sensor 7.
The free ends of the pouring channels 5 project into the continuous casting moulds A, B, C. For each casting mould, a desired filling level 8 set for normal operation, is located within a measuring zone 9 of a filling level measuring device associated with each continuous casting mould A, ~, C and comprising a transmitter 10 and a receiver 11.
Downstream of the continuous casting moulds A, B, C is a secondary cooling device which is not shown for the sake of simplicity, and withdrawing means, common to all continuous castings 18 formed in the moulds A, B, C, and comprising drive rolls 12, a drive motor 13, a drive regulator or controller 14, and a withdrawing velocity or speed sensor 15.
The latter supplies signals firstI~ to the drive regulator 14 and secondly to a processor 16 which also receives and processes, in addition, signals from the position indicators 7 indicative of the degree of opening cf the sliding gate valves 4 and signals from the xeceivers 11 indicative of the açtual filling levels in the moulds. The dat~ obtained are supplied to a ~` control computer 17 integrated in the processor 16, the computer giving appropriate control commands to the actuators 6 of the `~:
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sliding gate valves 4 and to the reyulator 14 of the withdraw-ing means. The withdrawing speed is set as a constant, ie. the continuous castings 18 formed in the moulds A, B, C are with-drawn by the common withdrawing means at a constant speed, which means that the filliny levels 8 are regula-ted solely from the feed or supply side by means of the slidiny yate valves. For this purpose, the slidiny yate valves 4 are main-tained in normal pouring operation in throttled positions in order to enable the flow through them to be increased as well as decreased.
For casting on, ie. at commencement of pouring or casting, startiny bars or cold castings l9 are introduced into the con-tinous casting moulds A, s, C and the withdrawing drive 13 is switched off. The measuring zone 9 has a lower signal plane 21 and an upper signal plane 22 which serve for controlling the sliding gate valves 4 and the drive motor 13. However, this is effected in a different fashion than in the invention of the said Canadian patent application No. 489,950, in which the actual filliny levels 20 of all three continuous casting moulds A, B, C between the signal planes 21 and 22 are brought to one level during pouring.
For pouring-on according to the present invention, the slide valves 4 a~e opened partially, preferably only 35~, ie.
they are by no means fully open~d. ~here are hence created controlled reserves for the valves 4 both in the closing as well as in the opening directions, which allow each actual rising filling level 20 in each continuous casting mould A, B, C (see Figure 2) to rise from the lower signal plane 21 to the desired filling level 8 at a predetermined ra-te, ie. along a predetermined ascending curve 40, which is matched to the operational conditions of the respective plant by suitable programming of the processor 16.
The criterium of curve 40 which determine the filling speed of the continuous casting moulds A, B, C during pouring, '-, ,' ` .
., .. . ~ . .
,, , is that it must no-t be so flat -that it falls below the con-gealing limit of the melt in the slidiny valves, nor must i-t be so steep that the upper splashing limit at the edge of the continuous casting mould is exceeded. The regulating of each slide valve 4 according to curve 40 starts, as mentioned, a-t the lower signal plane 21 and is triygered by the rising filling level 20 in the continuous casting moulds A, B, C. When, on rising, the last of all the actual filliny levels A20 or B20 or C20 passes the lower signal plane 21, the control computer 17 of the processor 16 switches on the withdrawiny drive motor 13 of the common withdrawing means for the castings 18. The rising of the actual filling levels A20, B20, C20 then take place independently from one another, continuing on the basis of the same criteria and, consequently, according to graphically parallel ascending curves 40 until the desired filling level set for normal casting operation is reached. If, during this transition stage the sliding gate valves would have received excessive signals due to a too rapidly rising filling level 20, splashing of the melt over the edge of the continuous casting mould would occur. If, during pouring, an actual filling level 20 of a continuous casting mould A or B or C has already reached the upper signal plane 22, whilst the others are still below the lower signal plane 21, closing signals would issue to the sliding gate valves 4 associated with the moulds whose actual filling levels 20 are iagging in the said manner.
The graphic illustrations according to Figure 2 appl~ to the actual filling levels 20 indicated in Figure 1. According to these, the actual filling level 20 of the continuous casting mould C has reached the lower signal plane 21 first within a time Ct, after the simultaneous throttled opening of all the sliding gate valves 40 at the commencement of pouring. The sliding gate valve 4 associated with the continuous casting mould C then~regulates of the melt suppl~v according to the predetermined ascending curve 40. As a result, the actual filling levels 20 of the continuous casting moulds B and A pass successively in the times Bt and At through the signal plane 21, ' -:
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and their rising is then also regulated to follow ascending curves 40~ None of the actual filling levels 20 lays sub-stantiall~v behind the others. A20 reaches the lower signal plane or level 21 before C20 has reached to the upper siynal plane 22, so that the start command for the casting withdraw-ing drive motor 13 oriyinates from the actual filliny level A20 reaching the lower signal plane 21.
This is, however, not the case in the example according to Figure 3, in which the actual filling level A20 has reached the upper signal plane 22, and the actual filliny level B20 has exceeded the lower signal plane 21, but the actual filling level C20 lags behind, below the lower signal plane or level 21. ~ith this arrangement of actual filling levels the casting withdrawing drive motor 13 is triggered at the upper signal plane 22 through the actual filling level A20 and at the same time the slide valve 4 for the actual filliny level C20, which has not risen above the lower signal plane 21, is closed.
. . , , . , ~ ;, .. ~ - , .
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The presen-t invention is a modi~ication of the invention described and claimed in Canadian patent application No.
489,950 filed on September 4, 1985 in the name of Metacon AG.
This invention relates, like that of the said Canadian patent application No. 489,950, to a method of casting or pouring a molten metal, in particular a steel melt, from an intermediate vessel into a plurality of continuous casting moulds, wherein the filling level of the melt in each mould is maintained, within a measuring zone, at a desired level by means of controllable discharge valves and the resultant continuous castings are withdrawn at the same speed by means of common withdrawing means.
The said Canadian patent application No. 489,950 proposes that, in such a method, when the discharge valves have been opened at the intermediate vessel for commencing the casting on process, the actual filling level which rises in each mould above a starting bar head effects, on its reachiny a first pre-determined threshold value or a first signal plane, located in the lower region of the measuring zone, throttling of its dis-charge valve in order to equaIize all of the actual filling levels and subsequently the actuation of the casting withdrawing drive. This actuation, in the event of the equalization not having taken place, is effected at the latest at a second pre-determined threshold value or a second signal plane located ~5 below a desired filling level and above the first signal plane, on the first actual filling level reaching the second signal plane. The casting on process performed at the same withdrawing speed is thereby improved, in particular concerning its opera-tional reliability, with simple procedural steps.
The present invention is a modification of a cas-ting-on process controlled within a filling level measuring zone in ~ continuous casting moulds by way of discharge valves, with - constant withdrawing speed. An object of the invention is the improvement of the casting-on process by reducing the casting-on time by means of simplified procedural steps.
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. .
. ~,. ~ . , ~5~
According to the present inventlon -there i5 hence provided a method of pouriny a molten metal from an in-ter-mediate vessel into a plurality of continuous castiny moulds through respective controllable discharge valves and with-drawing all the resultant castings from the moulds with cornmonwithdrawing means at the same speed, which includes opening all the valves to initiate the pouring process;
monitoring the filling level within each mould in a measuring zone;
activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined thres-hold value within the measuring zone or on a first actual filling level reaching a second predetermined value, within the measuring zone, above the first predetermined threshold value; and regulating each actual filling level to move, from the first predetermined threshold value to a desired filling level, at a predetermined rate.
In this manner the equalization of the actual filling levels of all the continuous casting moulds (at which equaliza-tion the invention of the said Canadian patent application No.
489,350 aims) is avoided and control of the actual filling level of each continuous casting mould can be introduced smoothly in a separate manner into the normal feed regulation of the desired filling level, the casting withdrawing means being suitably actuated at a filling level of at least one of the continuous casting moulds between the lower and the upper predetermined threshold values or signal planes of the measur-ing zone, which ensures reliable withdrawal of the continuous castings. The withdrawing means accoxdingly reacts upon that which occurs first during the rise of the actual filling levels in the continuous casting moulds. In other words, the withdraw-ing means switches on when the lower signal plane is exceeded by the last actual filling level or, if this does not occur, as soon as the first actual filling level has reached the upper signal plane. As in the invention of the said Canadian patent ; application No. 489,950, after the withdrawing means has been :.
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actuated, the discharge valves of those continuou~ casting moulds of which the actual filliny level is still located below the lower signal plane, close automatically.
For a particularly smooth and operationally reliable casting on, the present invention proposes that -the regulation of the discharge valves, which is initiated at the lower signal plane, is such that the predetermined rate is in a region above the congealing limit of the melt in the valves, on the one hand, and below the splashing limit of the melt over the mould edge on the transition to the regulation of the desired filling level, on the other hand, ie. it takes place along an ascending curve when the filling level (y-axis) is plotted against time (x-axis). With this process, the transition from rapid regula-tion alony the ascending curve, which is defined by rapid changes of the flow cross-section at the discharge valves, to relatively slow regulation of the desired filling level with relatively undisturbed residual casting mould bath level, can take place. Furthermore congealing which can occur in the discharge valves and impede the pouring stream of molten metal is substantially reduced. This counteraction is further assisted by pouring being effected with the discharge valves being throttled up to 50%. Those discharge valves which are the most remote from the feed point of the intermediate vessel, ie. the discharge valves associated with the outer casting moulds, are advantageously less throttled than those of the inner casting moulds. In this manner the lower temperatures of the melt which prevail in the outer regions of a continuous casting plant or of an intermediate vessel are effectively taken into acdount. There is furthermore the possibility of opening~the discharge valves fully ,in the event o~ the actual fiIling levels lagging during pouring below the lower signal plane, before regulating the levels along the ascending curve, in order to flush away congealing crusts.
The invention will now be described by way of example with reference to the accompanying drawings in which :: :
.
: ,: :~ , : ~ :
: - : ~, , ~:` ~ : ' ~'', , , 5~
-- a~
FIGURE 1 is a diagrammatic view of a multiple con-tinuous-casting installation in a pouriny-on pos:ition; and FIGURES 2 and 3 diagrammatically illustrate different possible operational pouring sequences at pouriny on, ie. at commencement of pouring.
Reference numeral 1 in Figure 1 indicates a casting ladle from which steel melt is supplied via a controllable discharge valve 2 to an intermediate vessel 3 which, for its part, has three discharge valves in the form of sliding gate valves 4 which regulate the supply of melt through respective pouring channels or tubes 5 into three continuous casting moulds A, s, C. Each sliding gate valve 4 is mechanically coupled to an actuator or positioning member 6 whose operational position at any time is detected by a position indicator or sensor 7.
The free ends of the pouring channels 5 project into the continuous casting moulds A, B, C. For each casting mould, a desired filling level 8 set for normal operation, is located within a measuring zone 9 of a filling level measuring device associated with each continuous casting mould A, ~, C and comprising a transmitter 10 and a receiver 11.
Downstream of the continuous casting moulds A, B, C is a secondary cooling device which is not shown for the sake of simplicity, and withdrawing means, common to all continuous castings 18 formed in the moulds A, B, C, and comprising drive rolls 12, a drive motor 13, a drive regulator or controller 14, and a withdrawing velocity or speed sensor 15.
The latter supplies signals firstI~ to the drive regulator 14 and secondly to a processor 16 which also receives and processes, in addition, signals from the position indicators 7 indicative of the degree of opening cf the sliding gate valves 4 and signals from the xeceivers 11 indicative of the açtual filling levels in the moulds. The dat~ obtained are supplied to a ~` control computer 17 integrated in the processor 16, the computer giving appropriate control commands to the actuators 6 of the `~:
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sliding gate valves 4 and to the reyulator 14 of the withdraw-ing means. The withdrawing speed is set as a constant, ie. the continuous castings 18 formed in the moulds A, B, C are with-drawn by the common withdrawing means at a constant speed, which means that the filliny levels 8 are regula-ted solely from the feed or supply side by means of the slidiny yate valves. For this purpose, the slidiny yate valves 4 are main-tained in normal pouring operation in throttled positions in order to enable the flow through them to be increased as well as decreased.
For casting on, ie. at commencement of pouring or casting, startiny bars or cold castings l9 are introduced into the con-tinous casting moulds A, s, C and the withdrawing drive 13 is switched off. The measuring zone 9 has a lower signal plane 21 and an upper signal plane 22 which serve for controlling the sliding gate valves 4 and the drive motor 13. However, this is effected in a different fashion than in the invention of the said Canadian patent application No. 489,950, in which the actual filliny levels 20 of all three continuous casting moulds A, B, C between the signal planes 21 and 22 are brought to one level during pouring.
For pouring-on according to the present invention, the slide valves 4 a~e opened partially, preferably only 35~, ie.
they are by no means fully open~d. ~here are hence created controlled reserves for the valves 4 both in the closing as well as in the opening directions, which allow each actual rising filling level 20 in each continuous casting mould A, B, C (see Figure 2) to rise from the lower signal plane 21 to the desired filling level 8 at a predetermined ra-te, ie. along a predetermined ascending curve 40, which is matched to the operational conditions of the respective plant by suitable programming of the processor 16.
The criterium of curve 40 which determine the filling speed of the continuous casting moulds A, B, C during pouring, '-, ,' ` .
., .. . ~ . .
,, , is that it must no-t be so flat -that it falls below the con-gealing limit of the melt in the slidiny valves, nor must i-t be so steep that the upper splashing limit at the edge of the continuous casting mould is exceeded. The regulating of each slide valve 4 according to curve 40 starts, as mentioned, a-t the lower signal plane 21 and is triygered by the rising filling level 20 in the continuous casting moulds A, B, C. When, on rising, the last of all the actual filliny levels A20 or B20 or C20 passes the lower signal plane 21, the control computer 17 of the processor 16 switches on the withdrawiny drive motor 13 of the common withdrawing means for the castings 18. The rising of the actual filling levels A20, B20, C20 then take place independently from one another, continuing on the basis of the same criteria and, consequently, according to graphically parallel ascending curves 40 until the desired filling level set for normal casting operation is reached. If, during this transition stage the sliding gate valves would have received excessive signals due to a too rapidly rising filling level 20, splashing of the melt over the edge of the continuous casting mould would occur. If, during pouring, an actual filling level 20 of a continuous casting mould A or B or C has already reached the upper signal plane 22, whilst the others are still below the lower signal plane 21, closing signals would issue to the sliding gate valves 4 associated with the moulds whose actual filling levels 20 are iagging in the said manner.
The graphic illustrations according to Figure 2 appl~ to the actual filling levels 20 indicated in Figure 1. According to these, the actual filling level 20 of the continuous casting mould C has reached the lower signal plane 21 first within a time Ct, after the simultaneous throttled opening of all the sliding gate valves 40 at the commencement of pouring. The sliding gate valve 4 associated with the continuous casting mould C then~regulates of the melt suppl~v according to the predetermined ascending curve 40. As a result, the actual filling levels 20 of the continuous casting moulds B and A pass successively in the times Bt and At through the signal plane 21, ' -:
: , . - :
, .
: -i55~
and their rising is then also regulated to follow ascending curves 40~ None of the actual filling levels 20 lays sub-stantiall~v behind the others. A20 reaches the lower signal plane or level 21 before C20 has reached to the upper siynal plane 22, so that the start command for the casting withdraw-ing drive motor 13 oriyinates from the actual filliny level A20 reaching the lower signal plane 21.
This is, however, not the case in the example according to Figure 3, in which the actual filling level A20 has reached the upper signal plane 22, and the actual filliny level B20 has exceeded the lower signal plane 21, but the actual filling level C20 lags behind, below the lower signal plane or level 21. ~ith this arrangement of actual filling levels the casting withdrawing drive motor 13 is triggered at the upper signal plane 22 through the actual filling level A20 and at the same time the slide valve 4 for the actual filliny level C20, which has not risen above the lower signal plane 21, is closed.
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Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of pouring a molten metal from an intermediate vessel into a plurality of continuous casting moulds through respective controllable discharge valves and withdrawing all the resultant castings from the moulds with common withdraw-ing means at the same speed, which includes opening all the valves to initiate the pouring process;
monitoring the filling level within each mould in a measuring zone;
activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined threshold value within the measuring zone or on a first actual filling level reaching a second predetermined threshold value, within the measuring zone, above the first predetermined threshold valve; and regulating each actual filling level to move, from the first predetermined threshold value to a desired filling level at a predetermined rate.
monitoring the filling level within each mould in a measuring zone;
activating the withdrawing means on the actual filling levels of all the moulds reaching a first predetermined threshold value within the measuring zone or on a first actual filling level reaching a second predetermined threshold value, within the measuring zone, above the first predetermined threshold valve; and regulating each actual filling level to move, from the first predetermined threshold value to a desired filling level at a predetermined rate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853538222 DE3538222A1 (en) | 1985-10-26 | 1985-10-26 | METHOD FOR STARTING UP A CONTINUOUS CASTING SYSTEM WITH MULTIPLE STRINGS |
| DEP3538222.8 | 1985-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1265912A true CA1265912A (en) | 1990-02-20 |
Family
ID=6284598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000516400A Expired - Lifetime CA1265912A (en) | 1985-10-26 | 1986-08-20 | Method of casting melt into a plurality of continuous casting moulds |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0223078B1 (en) |
| JP (1) | JP2540032B2 (en) |
| CN (1) | CN1008985B (en) |
| AT (1) | ATE41340T1 (en) |
| CA (1) | CA1265912A (en) |
| CZ (1) | CZ281650B6 (en) |
| DE (2) | DE3538222A1 (en) |
| GR (1) | GR3000078T3 (en) |
| IN (1) | IN163970B (en) |
| MX (1) | MX172000B (en) |
| PL (1) | PL154653B3 (en) |
| SU (1) | SU1447270A3 (en) |
| ZA (1) | ZA865223B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183951A (en) * | 1986-02-07 | 1987-08-12 | Sumitomo Metal Ind Ltd | Control method for surface level of molten steel in mold |
| JPS62183952A (en) * | 1986-02-07 | 1987-08-12 | Sumitomo Metal Ind Ltd | Control method for surface level of molten steel in mold |
| MX170682B (en) * | 1988-11-22 | 1993-09-07 | Hitachi Zosen Corpuration | METHOD FOR THE AUTOMATIC STARTING OF A CONTINUOUS CASTING DEVICE |
| GB2249978B (en) * | 1990-11-26 | 1994-08-24 | Ishikawajima Harima Heavy Ind | Tundish flow control |
| FR2677284B1 (en) * | 1991-06-07 | 1993-08-27 | Pechiney Aluminium | PROCESS AND APPARATUS FOR AUTOMATIC CASTING OF SEMI-PRODUCTS. |
| EP0564674A1 (en) * | 1992-04-06 | 1993-10-13 | Zimmermann & Jansen GmbH | Method of starting a continuous-casting installation |
| EP0855238A1 (en) * | 1997-01-24 | 1998-07-29 | Alusuisse Technology & Management AG | Process for vertical continuous casting of metals |
| DE10033656A1 (en) * | 2000-07-11 | 2002-01-24 | Sms Demag Ag | Method and continuous casting device with a device for measuring the mold level for liquid metal, in particular for liquid steel |
| AU2002307417A1 (en) * | 2001-04-19 | 2002-11-05 | Alcoa Inc. | Continuous pressure molten metal supply system and method for forming continuous metal articles |
| US7934627B2 (en) | 2005-10-13 | 2011-05-03 | Alcoa Inc. | Apparatus and method for high pressure extrusion with molten aluminum |
| CN102430728B (en) * | 2011-12-07 | 2013-07-10 | 中宁县锦宁铝镁新材料有限公司 | Multi-crystallizer horizontal continuous casting tundish and continuous casting process implemented by using same |
| CN103112709B (en) * | 2013-03-11 | 2015-11-04 | 嘉诺资源再生技术（苏州）有限公司 | A kind of online removal device |
| CN105215305B (en) * | 2015-10-14 | 2017-09-01 | 中冶连铸技术工程有限责任公司 | A kind of three machines three stream sheet billet continuous casting machine production line |
| AT518476B1 (en) * | 2016-04-12 | 2020-02-15 | Primetals Technologies Austria GmbH | Process for starting and stopping a multi-strand continuous casting machine, common plug drive and multi-strand continuous casting machine |
| CN109789477B (en) * | 2016-09-27 | 2021-10-26 | 海德鲁铝业钢材有限公司 | Method for multiple casting of metal strands |
| US10913108B2 (en) * | 2017-09-12 | 2021-02-09 | Wagstaff, Inc. | Dynamically positioned diffuser for metal distribution during a casting operation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH639575A5 (en) * | 1979-04-27 | 1983-11-30 | Concast Ag | METHOD AND DEVICE FOR CONTINUOUSLY MOLDING SEVERAL STRINGS. |
| EP0149447A3 (en) * | 1983-12-29 | 1986-10-22 | VOEST-ALPINE Aktiengesellschaft | Method of controlling the level in continuous casting moulds of a multiple-strand continuous casting plant, and arrangement for carrying out the method |
| DE3432611C2 (en) * | 1984-09-05 | 1986-09-04 | Metacon AG, Zürich | Procedure for starting up a continuous caster with several strands |
-
1985
- 1985-10-26 DE DE19853538222 patent/DE3538222A1/en active Granted
-
1986
- 1986-06-24 CN CN86104290A patent/CN1008985B/en not_active Expired
- 1986-06-26 PL PL1986260288A patent/PL154653B3/en unknown
- 1986-07-10 SU SU864027772A patent/SU1447270A3/en active
- 1986-07-11 ZA ZA865223A patent/ZA865223B/en unknown
- 1986-07-21 IN IN547/CAL/86A patent/IN163970B/en unknown
- 1986-08-20 CA CA000516400A patent/CA1265912A/en not_active Expired - Lifetime
- 1986-08-29 JP JP61201895A patent/JP2540032B2/en not_active Expired - Lifetime
- 1986-10-17 DE DE8686114413T patent/DE3662339D1/en not_active Expired
- 1986-10-17 AT AT86114413T patent/ATE41340T1/en not_active IP Right Cessation
- 1986-10-17 EP EP86114413A patent/EP0223078B1/en not_active Expired
- 1986-10-24 CZ CS867721A patent/CZ281650B6/en not_active IP Right Cessation
- 1986-10-24 MX MX004144A patent/MX172000B/en unknown
-
1989
- 1989-06-15 GR GR89400087T patent/GR3000078T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SU1447270A3 (en) | 1988-12-23 |
| MX172000B (en) | 1993-11-29 |
| DE3538222C2 (en) | 1989-05-11 |
| IN163970B (en) | 1988-12-17 |
| CZ281650B6 (en) | 1996-12-11 |
| GR3000078T3 (en) | 1990-10-31 |
| DE3662339D1 (en) | 1989-04-20 |
| ATE41340T1 (en) | 1989-04-15 |
| JP2540032B2 (en) | 1996-10-02 |
| CN86104290A (en) | 1987-05-06 |
| JPS62101359A (en) | 1987-05-11 |
| DE3538222A1 (en) | 1987-05-27 |
| EP0223078A1 (en) | 1987-05-27 |
| EP0223078B1 (en) | 1989-03-15 |
| ZA865223B (en) | 1987-03-25 |
| PL154653B3 (en) | 1991-09-30 |
| CN1008985B (en) | 1990-08-01 |
| CZ772186A3 (en) | 1996-09-11 |
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