CA2404331A1 - Automatic start method and device for continuous casting systems - Google Patents
Automatic start method and device for continuous casting systems Download PDFInfo
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- CA2404331A1 CA2404331A1 CA002404331A CA2404331A CA2404331A1 CA 2404331 A1 CA2404331 A1 CA 2404331A1 CA 002404331 A CA002404331 A CA 002404331A CA 2404331 A CA2404331 A CA 2404331A CA 2404331 A1 CA2404331 A1 CA 2404331A1
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- distributor
- time
- steel
- cndot
- temperature
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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
- B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
Abstract
The invention relates to an automatic start method for continuous casting systems, preferably for strand thicknesses of 10 -150 mm and widths of up to 3.500 mm by regulating the casting level and by means of a closure system consisting of a slider system or a stopper system. In order to automatically start the continuous casting system, the following process data is detected: the temperature of the steel at the end of the treatment thereof in the secondary metallurgic range, T.LF (11); the heating-up time of the distribut or before casting begins, t.T0,5 (5.1); the inner distributor temperature after the distributor has been pre-heated, W.T (14), T.T (4); the weight of the steel in the distributor at the moment when the distributor is opened for casting to begin; the time required to fill the permanent mold, the time between the moment the permanent mold is opened and the strand (15) is removed; formation of a functional context for the product of T.LF (11), t.T0,5 (5.1), W.T (14), for example; formation of the functional relationshi p between filling time (15) and the product from ((11) (5.1) (14)); establishment of the desired filling time (15) for all successive castings a nd determination of the weight of the steel in the distributor equivalent to th e desired filling time when the temperature of the steel T.LF (11) is set in a n uncontrolled manner; pre-heating time of the distributor t.T (5) and distributor temperature T.T (4) directly before the kettle is opened in orde r to fill the distributor.
Description
The invention relates to a method of an a device for automatic casting in continuous casting systems, preferably, for casting of strand thicknesses between 10 and 150mm and widths up to 3,500 mm by using regulation of the casting level and a closure system consisting of a slider system or, preferably, a stopper. Continuous casting systems with an~oscillating mold were developed in last years for high-output plant that are designed for operating at speeds up to l Om/min. Here, in particular, thin slabs producing plants with a casting thickness in the mold from 40 to 1 SOmm and a width of 800-3,SOOmm should be mentioned.
These plants make an automatic start more and more important as a strand should include a reproducible and minimized dummy piece which, as a rule, is discarded. Furthermore, the direct connection of the continuous casting system with a rolling process-here to be called, e.g., a compact strip production plant (CSP-plant)-requires maximization of the steel quality and minimization of the discarded material because the process connection with respect to temperatures makes "cleaning" of slabs impossible.
NYl 5232953v1 In addition, a hopper mold is necessary (German Patent DE
3400220) that permits to reproduce filling up of a mold from opening of the distributor until the removal of a slab from the mold with a following reproduction starting strategy with a set speed of, e.g., up to 6m/min.
During casting of thin slabs with or without a runner (with parallel wide walls) in the mold, the starting process (from opening of the distributor up to removal of the mold bottom with a dummy strand or slab) should take from 10 to 20 minutes.
In order to obtain this time window, which is predetermined by metallurgical conditions in the mold, with a starting strategy that is based on the measurement of the casting level and the use of the casting level regulation ( 10) during filling of the mold (Fig. 1 ), the heat balance of steel in the ladle ( 1 ) as it travels from the crucible furnace (2) to the continuous casting distributor (3), and in the distributor itself is determined from kinematic and not from thermodynamic point of new.
These plants make an automatic start more and more important as a strand should include a reproducible and minimized dummy piece which, as a rule, is discarded. Furthermore, the direct connection of the continuous casting system with a rolling process-here to be called, e.g., a compact strip production plant (CSP-plant)-requires maximization of the steel quality and minimization of the discarded material because the process connection with respect to temperatures makes "cleaning" of slabs impossible.
NYl 5232953v1 In addition, a hopper mold is necessary (German Patent DE
3400220) that permits to reproduce filling up of a mold from opening of the distributor until the removal of a slab from the mold with a following reproduction starting strategy with a set speed of, e.g., up to 6m/min.
During casting of thin slabs with or without a runner (with parallel wide walls) in the mold, the starting process (from opening of the distributor up to removal of the mold bottom with a dummy strand or slab) should take from 10 to 20 minutes.
In order to obtain this time window, which is predetermined by metallurgical conditions in the mold, with a starting strategy that is based on the measurement of the casting level and the use of the casting level regulation ( 10) during filling of the mold (Fig. 1 ), the heat balance of steel in the ladle ( 1 ) as it travels from the crucible furnace (2) to the continuous casting distributor (3), and in the distributor itself is determined from kinematic and not from thermodynamic point of new.
NY I 5232953v1 The heat balance in the distributor (3) depends substantially from the temperature TT of the distributor and the heating-up time tT (5). If the heating-up temperature TT (4.1) amounts to, e.g., 1,200 C instead of 1,300 C (4.2), the solidification (9) on the inner wall (6.1 ) of the distributor, which is formed of refractory bricks which are carried by a steel jacket (6.2), is greater during the casting process. This solidification effect is observed also at the stopper (7) and the stopper seat (8.1 ) that forms the entrance of a submerged outlet (8), and leads to the distortion of a uniform steel flow with respect to the valve characteristic that is determined by the stopper position and the stopper seat.
A better insight is the distortion of casting at the stopper seat (8.1 ) can be gleamed from Fig. 2. Here, the initial solidification (9) at the stopper seat and the stopper (7) is clearly shown.
When the stopper opens, the initial solidification obstructs a uniform steel flow corresponding to the mass flow characteristic of a valve seat consisting of the stopper (7) and the stopper seat (8.1 ) of the submerged outlet (8).
A better insight is the distortion of casting at the stopper seat (8.1 ) can be gleamed from Fig. 2. Here, the initial solidification (9) at the stopper seat and the stopper (7) is clearly shown.
When the stopper opens, the initial solidification obstructs a uniform steel flow corresponding to the mass flow characteristic of a valve seat consisting of the stopper (7) and the stopper seat (8.1 ) of the submerged outlet (8).
NYI 5232953v1 In addition, Fig. 2 clearly shows that the material of the submerged outlet (8) and of the stopper (7) has a higher heat conductance of about 10 W/K~m than a conventional refractory material (6.1 ) of the distributor with conductance of about 3 w/mk, whereby the initial solidification at the stopper seat is built-up at a greater extent than in the distributor.
A shorter heating-up time tT (S) exerts also a further increased influence on the initial solidification and, thereby, on the distortion of the starting process, because the temperature gradient in the distributor wall, to the moment of casting, between the hot face (6.1.2) and the cold face (6.2.1 ) of the steel j acket (2) is greater with a shorter heating-up time and is inversely proportional thereto.
In addition to the influence of the initial solidification at the stopper (7) and the stopper seat (8.1 ), naturally, the steel temperature in the ladle, e.g., determined by the discharge temperature, TLF ( 11 ) of steel at the end of the secondary metallurgical range, e.g., at the crucible furnace (2), also exerts an influence.
A shorter heating-up time tT (S) exerts also a further increased influence on the initial solidification and, thereby, on the distortion of the starting process, because the temperature gradient in the distributor wall, to the moment of casting, between the hot face (6.1.2) and the cold face (6.2.1 ) of the steel j acket (2) is greater with a shorter heating-up time and is inversely proportional thereto.
In addition to the influence of the initial solidification at the stopper (7) and the stopper seat (8.1 ), naturally, the steel temperature in the ladle, e.g., determined by the discharge temperature, TLF ( 11 ) of steel at the end of the secondary metallurgical range, e.g., at the crucible furnace (2), also exerts an influence.
M'1 5232953v1 In addition, the thickness of the initial solidification at the stopper seat is influenced by shape of the distributor , distributor volume, ladle output, and the ratio of the distributor surface to the distributor volume. However, these influence variables could be considered as constant system data, and they do not directly influence an optimal process control "on-line".
This distortion of the start of casting by an uncontrolled initial solidification which depends essential on:
- steel temperature upon discharge at the end of the secondary metallurgical range, - heating-up time of the distributor, and - heating-up temperature of the distributor, often leads to the distortion and, thereby, to the interruption of the casting process which is often accompanied by mold overflow with a following rupture of a strand shell.
Accordingly, an object of the invention is to provide a method and a device which would make possible to obtain, NY I 5232953v1 independently from the thickness of the initial solidification, a desired casting time in a range of, e.g., 10-20 sec by using casting level regulation ( 10), start strategy ( 10.1 ), strand drivers ( 10.2) and stopper or slide valve adjustment (10.3).
An unexpected solution of the problem, which would not have been obvious to one of ordinary skill in the art, is described in the claims and would be explained in detail with reference to Figs.
1 through 4.
Fig. 1 shows an influence of actuating variables on the thermal condition of steel, e.g., between a crucible furnace and the start of casting during a predetermined time period of 10-20 sec.
Fig. 2 shows an initial solidification, e.g., at a stopper seat of a submerged outlet without (a) and with (b) formation of the initial solidification.
This distortion of the start of casting by an uncontrolled initial solidification which depends essential on:
- steel temperature upon discharge at the end of the secondary metallurgical range, - heating-up time of the distributor, and - heating-up temperature of the distributor, often leads to the distortion and, thereby, to the interruption of the casting process which is often accompanied by mold overflow with a following rupture of a strand shell.
Accordingly, an object of the invention is to provide a method and a device which would make possible to obtain, NY I 5232953v1 independently from the thickness of the initial solidification, a desired casting time in a range of, e.g., 10-20 sec by using casting level regulation ( 10), start strategy ( 10.1 ), strand drivers ( 10.2) and stopper or slide valve adjustment (10.3).
An unexpected solution of the problem, which would not have been obvious to one of ordinary skill in the art, is described in the claims and would be explained in detail with reference to Figs.
1 through 4.
Fig. 1 shows an influence of actuating variables on the thermal condition of steel, e.g., between a crucible furnace and the start of casting during a predetermined time period of 10-20 sec.
Fig. 2 shows an initial solidification, e.g., at a stopper seat of a submerged outlet without (a) and with (b) formation of the initial solidification.
NY I 5232953v 1 Fig. 3 shows a functional connection, e.g., in form of a mathematical product, between the time of filling up of a mold and the process actuating variable for different inner distributor wall temperatures.
Fig. 4 shows an example for a planned filling-up time and for a predetermined steel temperature in a ladle and the distributor heating-up time which provide for a desired weight of steel in the distributor for different distributor cold face temperatures.
Fig. 1 shows the influence of the actuating variables between a crucible furnace (2) and a stopper seat (8.1 ) on the initial solidification and, thereby, on the casting process in a continuous casting mold (13).
The following parameters exert an increased influence on the initial solidification (9) at a stopper (7) and the stopper seat (8.1 ) of the submerged outlet (8).
Fig. 4 shows an example for a planned filling-up time and for a predetermined steel temperature in a ladle and the distributor heating-up time which provide for a desired weight of steel in the distributor for different distributor cold face temperatures.
Fig. 1 shows the influence of the actuating variables between a crucible furnace (2) and a stopper seat (8.1 ) on the initial solidification and, thereby, on the casting process in a continuous casting mold (13).
The following parameters exert an increased influence on the initial solidification (9) at a stopper (7) and the stopper seat (8.1 ) of the submerged outlet (8).
M'I 5232953v1 reduced steel temperature, TLF ( 11 ) in the crucible furnace (2), a reduced distributor temperature in the interior (4.1 ) at the hot face (6.1.2) or outside at the distributor casing (6.2), as a cold face temperature (6.2.1 ) at the end of a distributor heating-up time tT (5) in the distributor heat-up condition (5.2), and reduced distributor heating-up temperatures tT (5) upon the use of a burner (8.2.1 ) or a furnace (8.2.2).
The weight of steel in the distributor WT ( 14) is a process parameter that breaches the initial solidification upon opening of the distributor and releases the position of the valve between the stopper (7) and the stopper seat (8.1 ). The greater is the initial solidification (9) the greater the pressure (14.1) or the steel weight ( 14) in the distributor should be at the opening of the stopper while retaining the valve opening and maintaining the same filling-up time.
The weight of steel in the distributor WT ( 14) is a process parameter that breaches the initial solidification upon opening of the distributor and releases the position of the valve between the stopper (7) and the stopper seat (8.1 ). The greater is the initial solidification (9) the greater the pressure (14.1) or the steel weight ( 14) in the distributor should be at the opening of the stopper while retaining the valve opening and maintaining the same filling-up time.
NY 1 5232953v1 In Fig. 2, in a partial view a), the initial solidification (9) is partially shown, representing an uncontrollable mass around the stopper. In a partial view b), a condition after the formation of the initial solidification (9), e.g., by at least one-time rapid opening and closing of the stopper before the start of the process, is shown.
With this measure, an uncontrolled initial solidification, which consists of crystals and melt (steel sponge filled with melt), is provided to form a temporary valve seat that provides for a uniform steel flow during casting and increases the reliability of the casting process.
Fig. 3 represent a functional connection between the filling-up time (15) and, e.g., a product of ~ a discharge temperature of steel in the crucible furnace T~LF ( 11 ), ~ a root of the heating-up time of the distributor t~T
(5.1 ), and NY 1 5232953 v I
~ the weight of steel in the distributor W~T ( 14) at the moment of opening of the distributor for different hot face distributor temperature T~T (4.1 ) and (4.2).
This function is valid for the following boundary conditions.
~ a constant time period between the discharge of steel at the crucible furnace (2) and opening of the ladle, ~ a constant time period between the heating-up of the distributor (5.2) and the opening of the distributor, ~ a constant and definite brick lining of the distributor, and ~ a predetermined distributor shape and volume.
Fig. 4 shows tables which make clear the inventive step of the invention. The examples clearly show that at a predetermined steel temperature T~LF ( 11 ) and the distributor heating-up time t~T
(5) immediately before the opening of the ladle, for a desired filling-up time t~M(15) of, e.g., 14 or 10 sec, a corresponding filling ratio expressed as the weight of steel ( 14) in the distributor NY 1 5232953v 1 or as a ferrostatic pressure ( 14.1 ), can be determined on-line with a mathematical function in order to reliably establish the desired filling-up time.
The tables make clear that at distributor hot face temperature of 1,200 C (4.1), the casting time t~M or the filling-up time (15) of ~ 14 sec at 18.2 t, and ~ lOsecat 19.6t or of 1,300 C (4.2), the filling-up time of ~ 14 sec at 13.8t, and ~ 10 sec at lS.St is established.
This shown connection makes it only possible, independent from the steel temperature ( 11 ) and the filling-up time of the distributor (5), which vary during the operation, to control and, thereby, completely automatize the casting process by M'1 5232953v1 determination of the corresponding weight of steel in the distributor.
In addition to the above-mentioned actuating variables, other energetically relevant actuating variables (21) e.g., the remaining, after preheating in the wear layer (6.1.1 ) that, is deposited, e.g., in form of an injection mass, on the permanent layer (6.1), residual moisture or gases likewise quantatively influence the initial solidification.
With this measure, an uncontrolled initial solidification, which consists of crystals and melt (steel sponge filled with melt), is provided to form a temporary valve seat that provides for a uniform steel flow during casting and increases the reliability of the casting process.
Fig. 3 represent a functional connection between the filling-up time (15) and, e.g., a product of ~ a discharge temperature of steel in the crucible furnace T~LF ( 11 ), ~ a root of the heating-up time of the distributor t~T
(5.1 ), and NY 1 5232953 v I
~ the weight of steel in the distributor W~T ( 14) at the moment of opening of the distributor for different hot face distributor temperature T~T (4.1 ) and (4.2).
This function is valid for the following boundary conditions.
~ a constant time period between the discharge of steel at the crucible furnace (2) and opening of the ladle, ~ a constant time period between the heating-up of the distributor (5.2) and the opening of the distributor, ~ a constant and definite brick lining of the distributor, and ~ a predetermined distributor shape and volume.
Fig. 4 shows tables which make clear the inventive step of the invention. The examples clearly show that at a predetermined steel temperature T~LF ( 11 ) and the distributor heating-up time t~T
(5) immediately before the opening of the ladle, for a desired filling-up time t~M(15) of, e.g., 14 or 10 sec, a corresponding filling ratio expressed as the weight of steel ( 14) in the distributor NY 1 5232953v 1 or as a ferrostatic pressure ( 14.1 ), can be determined on-line with a mathematical function in order to reliably establish the desired filling-up time.
The tables make clear that at distributor hot face temperature of 1,200 C (4.1), the casting time t~M or the filling-up time (15) of ~ 14 sec at 18.2 t, and ~ lOsecat 19.6t or of 1,300 C (4.2), the filling-up time of ~ 14 sec at 13.8t, and ~ 10 sec at lS.St is established.
This shown connection makes it only possible, independent from the steel temperature ( 11 ) and the filling-up time of the distributor (5), which vary during the operation, to control and, thereby, completely automatize the casting process by M'1 5232953v1 determination of the corresponding weight of steel in the distributor.
In addition to the above-mentioned actuating variables, other energetically relevant actuating variables (21) e.g., the remaining, after preheating in the wear layer (6.1.1 ) that, is deposited, e.g., in form of an injection mass, on the permanent layer (6.1), residual moisture or gases likewise quantatively influence the initial solidification.
NY 1 5232953v 1
Claims (11)
1. A method of automatic start of continuous casting systems, e.g., for casting of strand thicknesses between 10 and 150 mm and widths up to 3,500 mm by using regulation of a casting level and a closure system consisting of a slider system or, preferably, a stopper system, characterized in that an automatic start is based on collection of following process data:
.cndot. steel temperature at an end of steel treatment in a secondary metallurgical range, T.cndot.LF (11), .cndot. heating-up time of a distributor before casting begins, t.cndot.T~5 (5.1), .cndot. inner distributor wall temperature after the distributor has been preheated, W.cndot.T (14), T.cndot.T (4), .cndot. weight of steel in the distributor at a moment of opening of the distributor for casting to begin, .cndot. filling-up time of a mold, the time between opening of the mold and removal of the strand (15), .cndot. formation of a functional connection, e.g. of product of T.cndot.LF (11), t.cndot.T~5 (5.1 ), W.cndot.T (14), .cndot. formation of a function between the filling-up time (15) and a product of ((11) (5.1) (14)), .cndot. establishment of desired filling-up time (15) for all successive castings and determination of a weight of steel in the distributor equivalent to the desired filling-up time at an uncontrolled setting of the steel temperature T.cndot.LF (11), the preheating time of the distributor t.cndot.T (5) and a distributor temperature T.cndot.T(4) immediately before opening of the laddle for filling the distributor.
.cndot. steel temperature at an end of steel treatment in a secondary metallurgical range, T.cndot.LF (11), .cndot. heating-up time of a distributor before casting begins, t.cndot.T~5 (5.1), .cndot. inner distributor wall temperature after the distributor has been preheated, W.cndot.T (14), T.cndot.T (4), .cndot. weight of steel in the distributor at a moment of opening of the distributor for casting to begin, .cndot. filling-up time of a mold, the time between opening of the mold and removal of the strand (15), .cndot. formation of a functional connection, e.g. of product of T.cndot.LF (11), t.cndot.T~5 (5.1 ), W.cndot.T (14), .cndot. formation of a function between the filling-up time (15) and a product of ((11) (5.1) (14)), .cndot. establishment of desired filling-up time (15) for all successive castings and determination of a weight of steel in the distributor equivalent to the desired filling-up time at an uncontrolled setting of the steel temperature T.cndot.LF (11), the preheating time of the distributor t.cndot.T (5) and a distributor temperature T.cndot.T(4) immediately before opening of the laddle for filling the distributor.
2. A method according to claim 1, characterized in that casting takes place in an oscillating mold.
3. A method according to claim 1 or 2, characterized in that the preliminary solidification is formed by at least one-time rapid opening and closing in a region of the stopper seat.
4. A method according to one of claims 1 through 3, characterized in that casting takes place in a thin slab plant with a speed of maximum 12 m/min.
5. A method according to one of claims 1 through 4, characterized in that for determining of the functions, a transportation time of the ladder from discharge of the crucible furnace (2) until opening of the laddle and time between heating condition of the distributor and opening of the distributor are taken into account.
6. A method according to one of claims 1 through 5, characterized in that when determining the functions, an outer cold face temperature of the distributor (6.2.1) is determined and is taken into account.
7. A method according to one of claims 1 through 6, characterized in that when calculating the function of the filling-up time (15), in addition to the process variables, steel temperature in the laddle (11), distributor heating-up time (5), distributor inner temperature (4), and the weight of steel in the distributor TW (14) as well as other energy-relevant influencing variables (21) such as, e.g., remaining, after preheating of the refractory wall (6.1) and the injected mass (6.1.1), water content and/or content of volatile products which were introduced with the injected mass (6.1.1), are acquired with "on-line" computer (20) by digital resolution.
8. A device for producing slabs having a thickness between 10 and 150 mm and a width up to 3.5 m by using casting level regulation (10) connected with strand drivers (10.2) and a flow valve, preferable, a stopper (10.3), and in particular for effecting the method according to claim 1, characterized in that a temperature measuring device is arranged at the end of steel treatment, a temperature measuring system for determining time of the distributor heating-up step (5.3), a measuring system for determining the weight of steel in the distributor during the filling step of the distributor, a measuring system for determining the time from the start of a filling step of the mold (13) up to withdrawal of the strand (15.1) from the mold, and a computer system (20) are provided and communicated with each other for "on-line" determination of the weight of steel in the distributor ( 14) for a reliable adjustment of the filling-up time (15), taking into consideration at least the distributor temperature (11) and the distributor heating-up time (5) at the latest immediately before opening of the distributor.
9. A device according to claim 8, characterized in that a mold wide side wall (13.1) has a concave profile (13.1.1).
10. A device according to claim 8 or 9, characterized in that the continuous casting plant is provided with the strand drivers (10.2) which provide for a casting speed of maximum 12 m/min.
11. A device according to one of claims 8 through 10, characterized in that a measuring device for determining an outer cold face temperature (6.2.1).
LIST OF REFERENCE CHARACTERS
(1) Laddle (2) Crucible furnace (3) Distributor for continuous casting (4) Heating-up temperature of the distributor, T-T, inner hot face temperature (4.1 ) Heating-up temperature of the distributor of 1,200°C
(4.2) Heating-up temperature of the distributor of 1,300°C
(4.3) Measuring system (5) Heating-up time t.cndot.T
(5.1) Heating-up time t.cndot.T~5 (5.2) Heating-up state of the distributor (5.3) Measuring clock for determining the heating-up time for the distributor (6) Distributor wall (6.1) Refractory wall of the distributor, permanent lining (6.1.1) Injection mass as a wear lining (6.1.2) Inner refractory wall, hot face (6.2) Steel surface of the distributor, steel jacket (6.2.1) Outer steel surface temperature, cold face (6.2.1.1) Measuring device (7) Stopper (8) Submerged outlet, SEN
(8.1) Stopper seat at the entrance of SEN
(8.2) Heating-up state of the submerged outlet (8.2.1) Burner (8.2.2) Furnace (9) Initial solidification consisting of solidified steel and melt (steel sponge filled with melt) (10) Casting lever regulation (10.1) Casting strategy (10.2) Strand drivers (10.3) Position of the stopper or the slide valve with a volume flow characteristic (11) Discharge temperature of steel, T.cndot.LF at end of treatment of steel in the second metallurigical range, e.g., in the crucible furnace (2) (11.1) Measuring device (13) Continuous casting mold (13.1) Wide side (13.1.1) Concave wide side at least in the region of the casting lever (14) Weight of steel in the distributor W~T
(14.1) Steel hydrostatic pressure P at the stopper seat or ferrostatic pressure (14.2) Measuring system (15) Mold filling-up time, t.cndot.M from opening of the distributor (3) until removal of the strand (15.1) Measuring system (20) "On-line" computer system for determining of the weight of steel in the distributor for controlled and predetermined mold filling-up time (15), taking into consideration process influencing parameters such as (11), (5) and other (21) (21) Other energy-relevant process influencing parameters such as, e.g., residual water content and/or residual volotiles of the distributor injection mass (6.1.1).
LIST OF REFERENCE CHARACTERS
(1) Laddle (2) Crucible furnace (3) Distributor for continuous casting (4) Heating-up temperature of the distributor, T-T, inner hot face temperature (4.1 ) Heating-up temperature of the distributor of 1,200°C
(4.2) Heating-up temperature of the distributor of 1,300°C
(4.3) Measuring system (5) Heating-up time t.cndot.T
(5.1) Heating-up time t.cndot.T~5 (5.2) Heating-up state of the distributor (5.3) Measuring clock for determining the heating-up time for the distributor (6) Distributor wall (6.1) Refractory wall of the distributor, permanent lining (6.1.1) Injection mass as a wear lining (6.1.2) Inner refractory wall, hot face (6.2) Steel surface of the distributor, steel jacket (6.2.1) Outer steel surface temperature, cold face (6.2.1.1) Measuring device (7) Stopper (8) Submerged outlet, SEN
(8.1) Stopper seat at the entrance of SEN
(8.2) Heating-up state of the submerged outlet (8.2.1) Burner (8.2.2) Furnace (9) Initial solidification consisting of solidified steel and melt (steel sponge filled with melt) (10) Casting lever regulation (10.1) Casting strategy (10.2) Strand drivers (10.3) Position of the stopper or the slide valve with a volume flow characteristic (11) Discharge temperature of steel, T.cndot.LF at end of treatment of steel in the second metallurigical range, e.g., in the crucible furnace (2) (11.1) Measuring device (13) Continuous casting mold (13.1) Wide side (13.1.1) Concave wide side at least in the region of the casting lever (14) Weight of steel in the distributor W~T
(14.1) Steel hydrostatic pressure P at the stopper seat or ferrostatic pressure (14.2) Measuring system (15) Mold filling-up time, t.cndot.M from opening of the distributor (3) until removal of the strand (15.1) Measuring system (20) "On-line" computer system for determining of the weight of steel in the distributor for controlled and predetermined mold filling-up time (15), taking into consideration process influencing parameters such as (11), (5) and other (21) (21) Other energy-relevant process influencing parameters such as, e.g., residual water content and/or residual volotiles of the distributor injection mass (6.1.1).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10015469.7 | 2000-03-29 | ||
| DE10015469 | 2000-03-29 | ||
| DE10114348A DE10114348A1 (en) | 2000-03-29 | 2001-03-22 | Method and device for automatically starting continuous casting plants |
| DE10114348.6 | 2001-03-22 | ||
| PCT/EP2001/003621 WO2001072451A1 (en) | 2000-03-29 | 2001-03-29 | Automatic start method and device for continuous casting systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2404331A1 true CA2404331A1 (en) | 2001-10-04 |
Family
ID=26005073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002404331A Abandoned CA2404331A1 (en) | 2000-03-29 | 2001-03-29 | Automatic start method and device for continuous casting systems |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1272299A1 (en) |
| JP (1) | JP2003528730A (en) |
| CN (1) | CN1420808A (en) |
| AU (1) | AU2001254758A1 (en) |
| CA (1) | CA2404331A1 (en) |
| MX (1) | MXPA02009508A (en) |
| WO (1) | WO2001072451A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317110B (en) * | 2013-06-13 | 2017-02-08 | 唐山渤海冶金设备有限责任公司 | High-efficiency automatic casting starting system based on crystallizer liquid level detection |
| 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 |
| CN112605353A (en) * | 2020-12-14 | 2021-04-06 | 中国第一重型机械股份公司 | Ultra-large vertical continuous casting billet and production method thereof, and forging and production method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3358743A (en) * | 1964-10-08 | 1967-12-19 | Bunker Ramo | Continuous casting system |
| CH430066A (en) * | 1965-12-30 | 1967-02-15 | Concast Ag | Method and device for controlling a continuous casting plant |
| DE3221708C1 (en) * | 1982-06-09 | 1991-06-13 | Brown, Boveri & Cie Ag, 6800 Mannheim | Process and apparatus for filling a continuous casting mould while casting a strand |
| MX170682B (en) * | 1988-11-22 | 1993-09-07 | Hitachi Zosen Corpuration | METHOD FOR THE AUTOMATIC STARTING OF A CONTINUOUS CASTING DEVICE |
| US5918662A (en) * | 1995-02-28 | 1999-07-06 | Nkk Corporation | Method of controlling the operation of continuous casting and apparatus therefor |
-
2001
- 2001-03-29 JP JP2001570398A patent/JP2003528730A/en not_active Withdrawn
- 2001-03-29 WO PCT/EP2001/003621 patent/WO2001072451A1/en not_active Application Discontinuation
- 2001-03-29 CA CA002404331A patent/CA2404331A1/en not_active Abandoned
- 2001-03-29 CN CN 01807442 patent/CN1420808A/en active Pending
- 2001-03-29 MX MXPA02009508A patent/MXPA02009508A/en not_active Application Discontinuation
- 2001-03-29 EP EP01927838A patent/EP1272299A1/en not_active Withdrawn
- 2001-03-29 AU AU2001254758A patent/AU2001254758A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1272299A1 (en) | 2003-01-08 |
| AU2001254758A1 (en) | 2001-10-08 |
| MXPA02009508A (en) | 2003-05-14 |
| CN1420808A (en) | 2003-05-28 |
| WO2001072451A1 (en) | 2001-10-04 |
| JP2003528730A (en) | 2003-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |