EP0005820A1 - Procédé et dispositif pour la coulée continue des métaux selon une ou plusieurs lignes de coulée - Google Patents
Procédé et dispositif pour la coulée continue des métaux selon une ou plusieurs lignes de coulée Download PDFInfo
- Publication number
- EP0005820A1 EP0005820A1 EP79101640A EP79101640A EP0005820A1 EP 0005820 A1 EP0005820 A1 EP 0005820A1 EP 79101640 A EP79101640 A EP 79101640A EP 79101640 A EP79101640 A EP 79101640A EP 0005820 A1 EP0005820 A1 EP 0005820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- gas
- pouring tube
- metal
- mold
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009749 continuous casting Methods 0.000 title claims abstract description 9
- 230000008569 process Effects 0.000 title claims description 8
- 150000002739 metals Chemical class 0.000 title 1
- 239000007789 gas Substances 0.000 claims abstract description 48
- 238000005266 casting Methods 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000011261 inert gas Substances 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
Images
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
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/106—Shielding the molten jet
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- 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
Definitions
- the invention relates to a process for the continuous casting of metal in single or multi-strand systems, the metal, in particular steel, being poured through a pouring tube from a pouring vessel into an oscillating mold with a closed, pressurized, gas-filled space located above the mold bath level and a device for this.
- a common mold with several individual molds arranged next to one another is known. In their upper section, these individual molds have gas-filled cavities which are connected to one another. This maintains the same gas composition and pressure. Above the individual molds, there is a common attachment, which also oscillates with the mold, for receiving melt and which communicatively connects the individual molds. This has the advantage that the devices that move the individual strands can be driven at the same speed.
- a disadvantage of these known solutions is that the bath level height in the mold is regulated by regulating the gas pressure in the cavities above, which inevitably leads to fluctuations in the bath level, which lead to a deterioration of the cast product. Furthermore, complex devices for determining the bath level in the casting container upstream of the mold and devices for pressure monitoring in the cavities as well as a corresponding control device must be provided. In the previously known continuous casting process for casting small formats, such as billets, in which work is carried out without throttling elements on the intermediate container, such as a slide or stopper, the casting speed is essentially dependent on the ferrostatic height above the spout.
- inert gas is continuously fed into the room during the casting and the gas is separated into the atmosphere in the form of a bubble in counterflow to the metal flowing in the pouring tube.
- this so-called closed casting system ensures that the bath level in the mold automatically adjusts to a certain level and with only the slightest deviation during the entire casting process remains at this level.
- This level is determined or can be set by the corresponding height of the outlet opening of the immersed pouring tube in the mold cavity of the mold.
- the previously customary devices for determining the mold bath level are no longer necessary.
- the pouring speed is independent of the ferrostatic height or the bath level in the intermediate container. It is only determined by the easily adjustable pull-out speed.
- the flow rate of the metal in the pouring tube is kept lower than the possible rate of ascent of the gas bubbles.
- the flow rate of the metal in the pouring tube is set by the selected pull-out speed for a given flow cross section of the pouring tube.
- the relatively low inflow speed of the unthrottled metal in the pouring tube achieves the advantage that washout of the pouring tube with the associated risk of tearing it off and disruptions caused by the flow channel in the pouring tube becoming smeared due to deposits are avoided. This increases the safety of the casting process and leads to an improvement in the quality of the cast product.
- a further improvement of the cast product results from the fact that, with this closed casting system, no slag gets into the primary solidification area of the strand inside the mold, since reoxidation is not possible due to the inert atmosphere.
- the cleaning effect achieved by the rising gas also has a favorable effect on the casting quality.
- the lubrication can be done in a known manner with oil. However, due to the lack of oxygen, the amount of oil can be reduced considerably.
- the inert gas for example argon or nitrogen, is supplied in an amount of up to 0.5 l / sec.
- the gas flow For a smooth pouring process, it is advantageous to keep the gas flow constant and as small as possible for as long a casting period as possible, so that gas just rises to the bath level in the intermediate container.
- the flow cross-section of the pouring tube should not be too Fully filled with metal, ie the amount of metal flowing into the pouring tube should be less than the swallowing capacity of the pouring tube. This enables the gas expanding in the cavity to escape upwards.
- the device according to the invention is characterized in that the flow cross-section Q of the pouring tube is greater than or equal to Q k V, Q being the through-V g flow cross-section of the pouring tube, Q k the mold cross-section, V the pouring speed and V g the speed of the flowing metal in the pouring tube mean and a metering device is provided in the gas supply line.
- the lower end of the pouring tube should be arranged at a distance of 2-15 cm from the upper mold edge.
- the lower end of the pouring tube should be chamfered.
- an intermediate wall with a passage opening near the bottom should be provided in the pouring vessel, the cross section of the opening being smaller than the flow cross section of the pouring tube.
- a movable casing 3 is provided between an oscillating mold -1 and a stationary casting vessel 2, for example an intermediate container, which can compensate for the oscillating movements of the mold.
- This shell shown as a flexible metal bellows in the example shown, delimits a cavity 5 together with a pouring tube 4 attached under the pouring vessel 2.
- liquid metal for example steel
- argon becomes an inert gas from a gas Container 7 supplied to the cavity 5 via lines 8.
- an intermediate wall 11 is provided in the intermediate container, which has a passage opening 13, the cross-section of which is smaller than the flow cross-section 14 of the pouring tube 4. Therefore, the gas in the cavity 5, which expands due to the heating, can escape upward unhindered.
- the intermediate wall 11 is so high that the steel flows above it in the intermediate container after the casting process at the desired bath level 15.
- a pressure relief valve 12 is installed in the gas feed line for safety, which opens automatically at a pressure which corresponds to approximately twice the possible ferrostatic pressure. Due to the inert gas continuously introduced into the cavity 5, the bath level 6 adjusts itself exactly to the height of the lower end of the pouring tube 4. This is about 10 cm from the upper mold edge 17.
- the strand 9 formed with a solidified shell is conveyed out of the mold 1 by driven rollers, for example a drive and / or straightening unit (not shown).
- the gas introduced with a higher pressure than the ferrostatic column rises in the form of bubbles 16 in countercurrent - through the steel flowing downwards in the pouring tube and emerges through the bath level 15 in the intermediate vessel 2 into the free atmosphere.
- the flow rate of the steel in the pouring tube is kept lower than the possible rate of ascent of the gas bubbles.
- the beveling of the lower end of the pouring tube 4 facilitates the detachment of the gas bubbles.
- a uniform removal of the gas bubbles from the lower region of the pouring tube 4 is achieved in that the liquid steel is advantageously moved rotationally symmetrically about the longitudinal axis 25 of the strand.
- induction coils 26 are arranged around the mold cavity wall of the mold 1, with which a continuous or, if desired, intermittent movement of the liquid steel core can be caused.
- the steel is fed without throttling and consequently the flow speed of the steel in the pouring tube can be easily adjusted by the selected pull-out speed for a given flow cross section of the pouring tube.
- the product can also be derived from the continuity equation according to which the product of the casting speed V (cm / min) times the mold cross section Q k (cm 2 ) must be the same Flow velocity V g (cm / min) in the pouring tube times the flow cross-section Q g (cm) of the pouring tube, the required flow cross-section for preselected pouring speeds and mold formats can be calculated.
- the diameter of the flow channel of the pouring tube is 55 mm.
- the quantity of gas supplied is 0.005 l / sec at the start of the casting and is reduced to - a quantity of 0.002 l / sec after about 3 minutes.
- a metering device 10 is provided in the gas feed line 8, which always delivers the same amount of gas at a certain setting, regardless of the upstream and back pressure.
- the pressure of the gas in the cavity 5 is not regulated, as in the known methods, but only the amount of the continuously supplied inert gas. Since the inert gas can escape upwards, a pressure is automatically set in the cavity 5 which is the same as it corresponds to the ferrostatic height from the lower end of the pouring tube 4 to the bath level 15 in the intermediate container 2.
- the mold bath level adjusts itself exactly to the height of the lower end of the immersing pouring tube and remains there during the entire pouring process.
- the effective functioning of the system can be checked by observing the gas bubbles emerging through the bath level in the intermediate container.
- the above-mentioned bath level indicator for the intermediate container is not required. Furthermore, there are no devices for regulating the flow rate of the steel into the mold.
- the casting speed which is determined exclusively by the speed of the driving and / or straightening rollers, is only limited by the requirement that the flow rate of the steel in the pouring tube must be lower than the rate of ascent of the gas bubbles.
- the casting speed is more than 1.5 m / min over a large range of the casting time.
- 3 molds can be combined into one unit in the same water jacket 19 with only one cooling water inflow and outflow, as represented by the reference numerals 20 and 21.
- Such a unit therefore only requires an oscillation drive (not shown).
- the three cast strands 9 are supported and guided by the same rollers 22 and also pulled out with the same pulling unit, not shown.
- This has the advantage that all strands of the multi-strand system have the same bath level and are conveyed at the same speed.
- only a simple water system 23 with control is required for the strands 9.
- the line spacings 24 are approximately three times smaller than in conventional multi-line systems. Further advantages result, for example, from the design of the intermediate container, which can be built much shorter. In addition to the simpler design solution, this also brings metallurgical advantages. For example, the steel can be cast with a lower casting temperature. Also, because of the shorter distances between the point of impact of the pouring jet and the intermediate container spouts, the risk of closing is lower.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT79101640T ATE1934T1 (de) | 1978-06-01 | 1979-05-29 | Verfahren und vorrichtung zum stranggiessen von metall in ein- oder mehrstranganlagen. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH599778A CH628543A5 (de) | 1978-06-01 | 1978-06-01 | Verfahren und vorrichtung zum stranggiessen von metall in ein- oder mehrstranganlagen. |
| CH5997/78 | 1978-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0005820A1 true EP0005820A1 (fr) | 1979-12-12 |
| EP0005820B1 EP0005820B1 (fr) | 1982-12-08 |
Family
ID=4302719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79101640A Expired EP0005820B1 (fr) | 1978-06-01 | 1979-05-29 | Procédé et dispositif pour la coulée continue des métaux selon une ou plusieurs lignes de coulée |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0005820B1 (fr) |
| JP (1) | JPS54158334A (fr) |
| AT (1) | ATE1934T1 (fr) |
| CH (1) | CH628543A5 (fr) |
| DE (1) | DE2964197D1 (fr) |
| ES (1) | ES481461A1 (fr) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0255450A3 (en) * | 1984-02-24 | 1988-05-18 | Canadian Liquid Air Ltd Air Liquide Canada Ltee | Device for gas-shielding a molten metal jet |
| EP0352356A1 (fr) | 1988-05-27 | 1990-01-31 | Kinglor - Ltd | Procédé et équipement relatif pour la mise en ouvre la coulée continue d'acier en absence complète d'agents oxydants |
| DE3917403A1 (de) * | 1989-05-29 | 1990-12-06 | Zimmermann & Jansen Gmbh | Verfahren und vorrichtung zum fuellen einer stranggiesskokille mit metallischer schmelze |
| CN112276028A (zh) * | 2020-09-28 | 2021-01-29 | 广东伟业铝厂集团有限公司 | 一种铝合金的高速铸棒设备 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921450A (ja) * | 1982-03-19 | 1984-02-03 | Mitsubishi Heavy Ind Ltd | 高品位鋼の連続鋳造方法 |
| JPS5930453A (ja) * | 1982-08-03 | 1984-02-18 | カナデイアン・パテンツ・アンド・デベロツプメント・リミテツド | 溶融アルミニウム含有鋼及び合金の連続鋳造方法及び装置 |
| JPS5968644U (ja) * | 1982-10-25 | 1984-05-09 | 新日本製鐵株式会社 | 連続鋳造における溶融金属の注入制御装置 |
| DE3403892C2 (de) * | 1984-02-04 | 1986-08-14 | Mannesmann AG, 4000 Düsseldorf | Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze, in eine Stranggießkokille |
| FR2776216B1 (fr) * | 1998-03-19 | 2000-06-16 | Kvaerner Metals Clecim | Installation de coulee continue, en particulier pour l'acier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1921808A1 (de) * | 1969-04-29 | 1970-11-12 | Schloemann Ag | Verfahren und Vorrichtung zur Regelung des Zuflusses der Metallschmelze zu Stranggiesskokillen |
| FR2145478A1 (en) * | 1971-07-12 | 1973-02-23 | Ural Z Tyazhelogo | Continuous casting - supplying inert gas to liquid metal in ingot mould |
| US3905417A (en) * | 1972-12-21 | 1975-09-16 | Cem Comp Electro Mec | Electromagnetic rabbling mechanism for continuously pouring molten metal |
| DE2609065A1 (de) * | 1976-03-05 | 1977-09-15 | Arbed | Verfahren zur qualitativen verbesserung von stranggussmaterial aus beruhigten stahlqualitaeten |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1807846A1 (de) * | 1968-11-08 | 1970-07-30 | Vaw Ver Aluminium Werke Ag | Verfahren und Vorrichtung zur Foerderung,Verteilung oder Dosierung von schmelzfluessigem Metall |
-
1978
- 1978-06-01 CH CH599778A patent/CH628543A5/de not_active IP Right Cessation
-
1979
- 1979-05-29 AT AT79101640T patent/ATE1934T1/de not_active IP Right Cessation
- 1979-05-29 DE DE7979101640T patent/DE2964197D1/de not_active Expired
- 1979-05-29 EP EP79101640A patent/EP0005820B1/fr not_active Expired
- 1979-05-29 ES ES481461A patent/ES481461A1/es not_active Expired
- 1979-06-01 JP JP6759179A patent/JPS54158334A/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1921808A1 (de) * | 1969-04-29 | 1970-11-12 | Schloemann Ag | Verfahren und Vorrichtung zur Regelung des Zuflusses der Metallschmelze zu Stranggiesskokillen |
| FR2145478A1 (en) * | 1971-07-12 | 1973-02-23 | Ural Z Tyazhelogo | Continuous casting - supplying inert gas to liquid metal in ingot mould |
| US3905417A (en) * | 1972-12-21 | 1975-09-16 | Cem Comp Electro Mec | Electromagnetic rabbling mechanism for continuously pouring molten metal |
| DE2609065A1 (de) * | 1976-03-05 | 1977-09-15 | Arbed | Verfahren zur qualitativen verbesserung von stranggussmaterial aus beruhigten stahlqualitaeten |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0255450A3 (en) * | 1984-02-24 | 1988-05-18 | Canadian Liquid Air Ltd Air Liquide Canada Ltee | Device for gas-shielding a molten metal jet |
| EP0352356A1 (fr) | 1988-05-27 | 1990-01-31 | Kinglor - Ltd | Procédé et équipement relatif pour la mise en ouvre la coulée continue d'acier en absence complète d'agents oxydants |
| DE3917403A1 (de) * | 1989-05-29 | 1990-12-06 | Zimmermann & Jansen Gmbh | Verfahren und vorrichtung zum fuellen einer stranggiesskokille mit metallischer schmelze |
| DE3917403C2 (de) * | 1989-05-29 | 1998-02-05 | Zimmermann & Jansen Gmbh | Verfahren und Vorrichtung zum Füllen einer Stranggießkokille mit metallischer Schmelze |
| CN112276028A (zh) * | 2020-09-28 | 2021-01-29 | 广东伟业铝厂集团有限公司 | 一种铝合金的高速铸棒设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE1934T1 (de) | 1982-12-15 |
| EP0005820B1 (fr) | 1982-12-08 |
| ES481461A1 (es) | 1980-07-01 |
| JPS54158334A (en) | 1979-12-14 |
| DE2964197D1 (en) | 1983-01-13 |
| CH628543A5 (de) | 1982-03-15 |
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