EP0998360A1 - Procede de demarrage d'une operation de coulee continue des metaux - Google Patents
Procede de demarrage d'une operation de coulee continue des metauxInfo
- Publication number
- EP0998360A1 EP0998360A1 EP98935068A EP98935068A EP0998360A1 EP 0998360 A1 EP0998360 A1 EP 0998360A1 EP 98935068 A EP98935068 A EP 98935068A EP 98935068 A EP98935068 A EP 98935068A EP 0998360 A1 EP0998360 A1 EP 0998360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- stopper
- control cylinder
- metal
- level
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005058 metal casting Methods 0.000 title claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 238000005266 casting Methods 0.000 claims abstract description 38
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 4
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000003213 activating effect Effects 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 16
- 238000009749 continuous casting Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
-
- 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
Definitions
- the metal from the ladle is poured into the distributor. Then the stopper is opened so that the metal fills the ingot mold by flowing through the nozzle. When the metal reaches a predetermined level in the mold, the dummy is driven downwards, to start the extraction of the cast product, at least partially solidified in contact with the cooled walls of the mold.
- the reaction time of the stopper rod cannot be reduced sufficiently to completely avoid the aforementioned problem.
- the inertia of the metal flow and that of the stopper control means causes level fluctuations which can last for a certain time before the regulation and therefore the level stabilize and the casting becomes regular.
- Another problem which arises is to arrive at determining the moment of the effective start of the casting, that is to say the instant when the metal contained in the distributor begins to flow when the opening of the stopper is controlled. This problem is also linked to that of being able to control the rise in the level in the ingot mold, this level not being detectable during a large part of the filling, as we have seen previously.
- the only way to control this level rise is therefore to act on the flow of metal flowing from the distributor, which depends on the exact position of the stopper rod.
- the position of the stopper is conventionally determined by a measuring device located on the stopper control means and not on the stopper itself. It follows that the indication given by these measuring means is not exactly representative of the position of the stopper itself, this being due in particular to the inevitable clearances of the means of mechanical connection of the stopper to its control means . It follows that not only is there a time lag between the command to open the stopper rod and the start of the actual opening, and therefore the start of the flow of metal, but also, thereafter, the The indication of the position of the stopper rod is not an exact reflection of its actual position, which determines the metal flow rate. However, it is only by knowing the precise instant of the start of casting, and of the flow rate, that the level in the ingot mold can be determined precisely during filling.
- this process is characterized in that, before starting the casting: a) the stopper rod is placed on its seat under the sole effect of its own weight, the control cylinder being inactive and in a position of initialization defined by the position of the stopper rod, b) the said initialization position of the control cylinder is determined, c) the control cylinder is actuated in the closing direction to push the stopper rod on its seat, d) it is filled the distributor with the liquid metal, e) the control cylinder is actuated to bring it into a controlled over-closing position defined by a predetermined distance from the position of the control cylinder relative to the initialization position, and, to start casting: f) the control cylinder is actuated in the opening direction according to a predefined law imposed on the displacement of the control cylinder as a function of time, the instant of start of casting being determined From this law, by calculating with the law the time taken to that the control cylinder passes from the over-closing position to the initialization position, g) and
- the method according to the invention makes it possible to precisely determine the moment when the molten metal will be able to begin to flow between the stopper rod and its seat. This moment is therefore just when the distaff leaves his seat.
- the controlled over-closing position is defined by a preset distance considered from the position of the control jack when it just causes the stopper to detach from its seat, that is to say the initialization position.
- step f This law will therefore allow, at the beginning of step f), to ensure a displacement of the jack, without there being proportional displacement of the stopper rod, this displacement of the jack corresponding in a way to a relaxation of the stresses generated by the support effort of the stopper rod on its seat.
- step c) the stopper rod is pushed on its seat until the pushing force exerted by the control means reaches a predetermined value.
- a level regulation is brought into service which ensures level regulation as soon as the metal level comes close to the nominal level.
- the level regulation well known in continuous casting installations, is therefore put into service well before the metal level can be detected by the sensor, conventionally used in regulation systems.
- the regulation is however saturated so as to avoid that it tends to cause an additional opening of the stopper rod (which would normally be the case since the metal level is then largely below the normal level).
- the regulation circuits are already in service before the sensor detects the metal cast in the mold, the regulation intervenes without delay as soon as the metal level is detected. It follows that the reaction, caused by said regulation when the cast metal comes close to the nominal level, is less sharp and does not generate an abrupt displacement of the stopper rod or an abrupt variation in the extraction speed.
- FIG. 1 is a schematic view of an installation for continuous casting of steel in an ingot mold
- the installation also comprises, in a manner known per se, an ingot mold 20 whose walls are vigorously cooled to cool and solidify the molten metal poured into the ingot mold by the nozzle 4.
- the metal at least partially solidified in the form, for example, of a slab 21 is extracted from the mold downwards, by means of extraction rollers 22 driven in rotation by motors not shown.
- control cylinder must obviously understand not only a conventional cylinder comprising a rod movable in translation in a cylinder body, such as the cylinder 7 shown in Figure 1, but also any other actuator that can perform the same function of displacement of the stopper rod.
- the graph in FIG. 2 shows, by way of example of the method according to the invention, the variations in the position d of the jack 7 as a function of time t, from an instant situated before the starting process, until the arrival in normal casting regime.
- the trace 31 corresponds to the initialization position "O" of the control cylinder, that is to say the measured position of the cylinder rod when the stopper 5 rests under the effect of its own weight on its seat 6
- the jack is then not subjected to any pressure by the solenoid valve 13, the position of the rod then being solely determined by the position of the stopper 5.
- the weight of the stopper and that of the actuator rod exert downward efforts on the lever 8, and that, consequently, the inevitable clearances at the level of all the articulations are situated upwards for the articulations 51 and 61 of the stopper rod and the cylinder rod on the lever, as well as for the pivot articulation 9 of the lever on one installation.
- This position will subsequently be considered as the starting point for controlling the actuator under the imposed opening law already mentioned.
- the metal flow can therefore be different from the nominal flow under which the metal will flow from the distributor in the mold after the start of the rollers d 'extraction. It is only when the level of metal in the ingot mold arrives near the level detector 12 that the level regulation, of a type known per se, takes over to control the jack 7, as well as possibly the speed of the extractor rollers 22, to adapt the flow rate at the extraction speed, so as to maintain a substantially constant level of metal in the mold, as is well known.
- the invention is not limited to the starting process which has just been described only by way of example.
- the method according to the invention can advantageously be implemented in continuous casting installations between cylinders.
- the position measurements can be carried out by any other measuring means capable of precisely determining the position of the stopper control means.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Pinball Game Machines (AREA)
- Forging (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9709241A FR2766113B1 (fr) | 1997-07-16 | 1997-07-16 | Procede de demarrage d'une operation de coulee continue des metaux |
| FR9709241 | 1997-07-16 | ||
| PCT/FR1998/001401 WO1999003619A1 (fr) | 1997-07-16 | 1998-07-01 | Procede de demarrage d'une operation de coulee continue des metaux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0998360A1 true EP0998360A1 (fr) | 2000-05-10 |
| EP0998360B1 EP0998360B1 (fr) | 2002-09-25 |
Family
ID=9509440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98935068A Expired - Lifetime EP0998360B1 (fr) | 1997-07-16 | 1998-07-01 | Procede de demarrage d'une operation de coulee continue des metaux |
Country Status (25)
| Country | Link |
|---|---|
| US (1) | US6374902B1 (fr) |
| EP (1) | EP0998360B1 (fr) |
| JP (1) | JP4224840B2 (fr) |
| KR (1) | KR100538966B1 (fr) |
| CN (1) | CN1086614C (fr) |
| AT (1) | ATE224783T1 (fr) |
| AU (1) | AU727961B2 (fr) |
| BR (1) | BR9811792A (fr) |
| CA (1) | CA2296743C (fr) |
| CZ (1) | CZ288868B6 (fr) |
| DE (1) | DE69808299T2 (fr) |
| DK (1) | DK0998360T3 (fr) |
| ES (1) | ES2184303T3 (fr) |
| FR (1) | FR2766113B1 (fr) |
| MX (1) | MXPA00000553A (fr) |
| PL (1) | PL186661B1 (fr) |
| PT (1) | PT998360E (fr) |
| RO (1) | RO120463B1 (fr) |
| RU (1) | RU2216430C2 (fr) |
| SK (1) | SK285291B6 (fr) |
| TR (1) | TR200000104T2 (fr) |
| TW (1) | TW375540B (fr) |
| UA (1) | UA59406C2 (fr) |
| WO (1) | WO1999003619A1 (fr) |
| ZA (1) | ZA986185B (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2843056B1 (fr) * | 2002-07-31 | 2004-09-03 | Realisations Tech Sert Soc Et | Procede de demarrage automatique d'une installation de coulee continu et ensemble pour la mise en oeuvre de ce procede |
| US8440021B2 (en) * | 2007-08-16 | 2013-05-14 | The Regents Of The University Of Michigan | Apparatus and method for deposition for organic thin films |
| CN104550897A (zh) * | 2014-12-15 | 2015-04-29 | 余姚市庆达机械有限公司 | 一种塞杆机构 |
| CN108145112B (zh) * | 2016-12-05 | 2020-01-21 | 上海梅山钢铁股份有限公司 | 基于液位自动控制的板坯连铸塞棒控流自动开浇工艺 |
| EP3994171A1 (fr) | 2019-07-05 | 2022-05-11 | iOmx Therapeutics AG | Anticorps de liant à l'igc2 de l'igsf11 (vsig3) et leurs utilisations |
| WO2022008027A1 (fr) | 2020-07-06 | 2022-01-13 | Iomx Therapeutics Ag | Anticorps de liaison à l'igv d'igsf11 (vsig3) et leurs utilisations |
| CN116944449B (zh) * | 2023-07-20 | 2025-09-26 | 中冶南方连铸技术工程有限责任公司 | 一种自动开浇进程中摆脱塞棒头与水口粘接的方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668570A (en) * | 1979-11-07 | 1981-06-09 | Kobe Steel Ltd | Method of controlling molten metal surface when starting up continuous casting |
| DE3421344C2 (de) * | 1984-06-08 | 1993-04-29 | Krupp Stahl Ag, 4630 Bochum | Verfahren und Vorrichtung zum automatischen Füllen einer Stranggießkokille beim Angießen eines Stranges |
| DE3509932A1 (de) * | 1985-03-19 | 1986-10-02 | Metacon AG, Zürich | Verfahren zum anfahren einer stranggiessanlage |
| LU85878A1 (de) * | 1985-05-07 | 1986-12-05 | Arbed | Verfahren zur automatischen steuerung des anfahrbetriebes einer metall-stanggiessanlage |
| EP0214797B1 (fr) * | 1985-09-02 | 1991-06-26 | Nippon Steel Corporation | Méthode pour contrôler le début de la coulée dans un procédé de coulée en continu |
| MX170682B (es) * | 1988-11-22 | 1993-09-07 | Hitachi Zosen Corpuration | Metodo para el arranque automatico de un aparato de fundicion continua |
| CH682376A5 (de) * | 1990-02-28 | 1993-09-15 | Stopinc Ag | Verfahren zum automatischen Angiessen von einer Stranggiessanlage. |
| FR2677284B1 (fr) * | 1991-06-07 | 1993-08-27 | Pechiney Aluminium | Procede et appareillage pour la coulee automatique de demi-produits. |
| US5311924A (en) * | 1991-09-12 | 1994-05-17 | Kawasaki Steel Corporation | Molten metal level control method and device for continuous casting |
| FR2698806B1 (fr) * | 1992-12-07 | 1995-01-06 | Lorraine Laminage | Procédé de remplissage automatique d'une lingotière de coulée continue, en début de coulée, et dispositif pour sa mise en Óoeuvre. |
| WO1996026800A1 (fr) * | 1995-02-28 | 1996-09-06 | Nkk Corporation | Procede et appareil de regulation de la coulee continue |
| WO1997014521A1 (fr) * | 1995-10-18 | 1997-04-24 | Sumitomo Metal Industries, Ltd. | Procede de reglage du niveau de metal en fusion dans une machine de coulage continu |
-
1997
- 1997-07-16 FR FR9709241A patent/FR2766113B1/fr not_active Expired - Fee Related
-
1998
- 1998-01-07 UA UA2000020805A patent/UA59406C2/uk unknown
- 1998-07-01 CZ CZ200041A patent/CZ288868B6/cs not_active IP Right Cessation
- 1998-07-01 US US09/462,154 patent/US6374902B1/en not_active Expired - Fee Related
- 1998-07-01 RU RU2000103487/02A patent/RU2216430C2/ru not_active IP Right Cessation
- 1998-07-01 TR TR2000/00104T patent/TR200000104T2/xx unknown
- 1998-07-01 PT PT98935068T patent/PT998360E/pt unknown
- 1998-07-01 AU AU84448/98A patent/AU727961B2/en not_active Ceased
- 1998-07-01 DK DK98935068T patent/DK0998360T3/da active
- 1998-07-01 CA CA002296743A patent/CA2296743C/fr not_active Expired - Fee Related
- 1998-07-01 ES ES98935068T patent/ES2184303T3/es not_active Expired - Lifetime
- 1998-07-01 DE DE69808299T patent/DE69808299T2/de not_active Expired - Fee Related
- 1998-07-01 WO PCT/FR1998/001401 patent/WO1999003619A1/fr not_active Ceased
- 1998-07-01 BR BR9811792-0A patent/BR9811792A/pt not_active IP Right Cessation
- 1998-07-01 SK SK32-2000A patent/SK285291B6/sk not_active IP Right Cessation
- 1998-07-01 AT AT98935068T patent/ATE224783T1/de not_active IP Right Cessation
- 1998-07-01 JP JP2000502900A patent/JP4224840B2/ja not_active Expired - Fee Related
- 1998-07-01 PL PL98338193A patent/PL186661B1/pl not_active IP Right Cessation
- 1998-07-01 EP EP98935068A patent/EP0998360B1/fr not_active Expired - Lifetime
- 1998-07-01 MX MXPA00000553A patent/MXPA00000553A/es not_active IP Right Cessation
- 1998-07-01 CN CN98807295A patent/CN1086614C/zh not_active Expired - Fee Related
- 1998-07-01 RO ROA200000044A patent/RO120463B1/ro unknown
- 1998-07-01 KR KR10-2000-7000453A patent/KR100538966B1/ko not_active Expired - Fee Related
- 1998-07-09 ZA ZA986185A patent/ZA986185B/xx unknown
- 1998-09-03 TW TW087114677A patent/TW375540B/zh not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9903619A1 * |
Also Published As
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