EP1077781A1 - Method and device for drawing off a metal strand - Google Patents
Method and device for drawing off a metal strandInfo
- Publication number
- EP1077781A1 EP1077781A1 EP99929058A EP99929058A EP1077781A1 EP 1077781 A1 EP1077781 A1 EP 1077781A1 EP 99929058 A EP99929058 A EP 99929058A EP 99929058 A EP99929058 A EP 99929058A EP 1077781 A1 EP1077781 A1 EP 1077781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- walls
- vibration
- feed container
- length
- 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 12
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 3
- 210000001061 forehead Anatomy 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000008719 thickening 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
Definitions
- Such drives which are regularly designed as hydraulic piston-cylinder units or as electrical linear drives, oscillate in a frequency range ⁇ 100 Hz.
- EP 0325931 A1 discloses a method and a device for oscillating a steel continuous casting mold, in which the lifting height is set as a function of the strand withdrawal speed. For this, at casting speeds of slabs up to 6 m / min. and with billets and thin slabs up to 10 m / min oscillation frequencies ⁇ 200 strokes per minute.
- EP 0807478 A1 also discloses the oscillation device by means of an electromagnetic field.
- electrical elements are installed on the side walls of the mold, by means of which an electrical field can be generated, which influences the strand shell that arises in the mold.
- a direct one To prevent electrical contact between the molten metal and the mold wall, the mold is coated on its inner walls, the coating having a high thermal conductivity and consisting, for example, of amorphous carbon.
- the power supply is designed so that it can oscillate the mold between 2 and 100 Hz at about 150 kA for a period of between 5 and 5000 ⁇ s.
- the invention has set itself the goal of creating a method and a device for pulling off a metal strand, in particular steel, by means of a stationary mold, with which a safe, tack-free conveying of the shell of an endless strand enveloping the liquid metal is possible with a high surface quality.
- the full length of the mold walls is excited to an oscillation> 400 Hz and in such a way that there is only a negative strip to the shell box of the strand.
- the metal strand is drawn off from the drivable guide rollers arranged downstream of the mold. The conveying process of the strand is completely independent of the current mold vibration frequency.
- vibration exciters which indicate a voltage wave in the mold walls, the length of the mold walls being greater than the length of the voltage wave of the vibration.
- the vibration exciters are arranged in the head area and, if necessary, additionally on the side walls and emit their momentum to the mold walls.
- the mold walls are on the mouth side on an abutment.
- the vibrations are indicated in the mold walls over the entire circumference of the end face of the mold.
- Each pulse causes a longitudinal and transferal wave in the mold walls.
- the mold walls show when passing through the Vibration quasi thickening and constriction. As a result, there are wave crests which act on the outer skin of the strand shell in the strand withdrawal direction.
- the surface of the inner walls is designed so that it has a particularly low roughness.
- a coating that has a largely smooth surface and is also thermally and chemically resistant, e.g. consists of ceramic materials, and has a roughness that is smaller than the amplitude of the stress waves indicated in the mold walls.
- the space between the feed container and the mold can advantageously be closed, since the otherwise required feed elements of the mold powder are dispensed with on the open bath surface.
- a shield is provided between a feed container having a dip tube and the mold entrance, to which a connection is attached, which is connected to a gas supply.
- This gas supply in particular supports inert gas.
- a sleeve is arranged between a feed container and the mold face.
- This sleeve is firmly connected to the forehead of the mold inlet, the sleeve being arranged outside the vibration exciter and preferably being connected to the water box of the mold.
- This feed container can be designed so that it has only one opening in the bottom and thus dispenses with a dip spout. Gas with excess pressure can be introduced into the interior of the sleeve provided here. In this way, influence is not only exerted on the pouring jet leaving the feed vessel, but also on the pouring level of the melt in the mold.
- a vacuum can be created in the latter having a bottom opening in the latter, insofar as it is designed as a vacuum vessel, in order to again influence the level of the To take the casting mirror in the mold.
- inert gas at normal pressure is introduced into the free space of the sleeve.
- Imbalance exciters, capacitor plates or even piezo crystals are used as vibration exciters.
- the vibrators are advantageously firmly connected to the face of the mold.
- the vibration exciters are attached over the entire width to the forehead of each mold wall, so that the mold face is vibrationally linked over the entire circumference.
- the taper runs in the strand conveying direction and the tip of the cone has a width of ⁇ 1 mm.
- the abutment is hardened for wear reasons.
- Figure 1 schematically shows a section through the mold
- Figure 2 shows a continuous casting device consisting of feed vessel and mold and guide rollers.
- FIG. 1 shows a feed container 41 filled with melt S, in the bottom 42 of which an opening 47 is provided, on which an immersion pouring tube 43 is arranged, which projects into a mold 11.
- the mold 11 has mold broad sides 14 and narrow sides 15, not shown here.
- the mold broad side 14 shown on the right in FIG. 1 has a coating 18 on its inner wall. Furthermore, there is a vibration exciter 21 on the front face 19 and a further vibration exciter 21 in the entrance area on this mold broad side 14 17 attached.
- the mold mouth 13 of this broad mold side 14 tapers conically and is supported with its tip 16 on an abutment 31 which has a contact surface 32.
- the broad side 14 of the mold shown on the left side of the mold 11 is located on the mold opening 13 on an abutment 31.
- An imbalance exciter 22 is attached to the end face 19 as a vibration exciter.
- this broad mold side 14 has a water tank 81 which is connected to the bottom 42 of the inflow container 41 by a bellows 46.
- a shell casing K which surrounds the melt S and is guided over guide rollers 71 which are connected downstream of the mold 11 and conveyed out of the mold via drive rollers 72.
- the feed container 41 is designed as a vacuum device 61 which has a vacuum device 62.
- An opening 47 is provided in the bottom 42 of the feed container 41, the cross-sectional area A z of which is smaller than the cross-sectional area A ⁇ of the mold. So there was no dip tube.
- the mold 11, of which the mold broad sides 14 are shown, is arranged below the opening 47 of the feed container 41.
- the wide mold sides 14 are supported on abutments 31 provided with a contact surface 32.
- the two mold broad sides 14 shown only the right one has a coating 18.
- Both broad mold sides 14 are provided with water boxes 81, to which a gas-tight connection 45 is fastened, which is connected to the bottom 42 of the feed container 41.
- the gas-tight connection 45 is connected to a gas supply 52 via a connection 51. With this gas supply 52, negative pressure or positive pressure can be generated in the space between the bottom 42, the gas-tight connections 45 and the surface of the melt S located in the mold 11. The melt leaving the feed container 41 through the opening 47 falls freely into the mold 11.
- the shell box K produced in the mold 11 is guided below the mold via guide rollers 71 and is conveyed out of the mold 11 by drive rollers 72.
- the wide mold sides 14 are tapered at the mold mouth 13 to a cone tip 16 with the width b and have a length L '.
- a piezo crystal 24 is fastened on the left end face 19 and a capacitor plate 23 is fastened on the right hand side.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Metal Extraction Processes (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823361A DE19823361A1 (en) | 1998-05-15 | 1998-05-15 | Continuous billet extraction |
DE19823361 | 1998-05-15 | ||
PCT/DE1999/001273 WO1999059749A1 (en) | 1998-05-15 | 1999-04-26 | Method and device for drawing off a metal strand |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1077781A1 true EP1077781A1 (en) | 2001-02-28 |
EP1077781B1 EP1077781B1 (en) | 2002-09-25 |
Family
ID=7868886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99929058A Expired - Lifetime EP1077781B1 (en) | 1998-05-15 | 1999-04-26 | Method and device for drawing off a metal strand |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1077781B1 (en) |
AT (1) | ATE224781T1 (en) |
AU (1) | AU4601299A (en) |
DE (2) | DE19823361A1 (en) |
ES (1) | ES2181450T3 (en) |
WO (1) | WO1999059749A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011083016A1 (en) * | 2011-09-20 | 2013-03-21 | Sms Siemag Ag | Apparatus for continuous casting and use of piezoelectric actuators |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR873400A (en) * | 1941-05-15 | 1942-07-07 | Usines Ernest Tordoir | Device for the continuous casting of metal parts |
DE1120641B (en) * | 1954-05-25 | 1961-12-28 | British Iron Steel Research | Method and device for casting metal |
DE1865985U (en) * | 1961-01-16 | 1963-01-24 | Hoerder Huettenunion Ag | CONTINUOUSLY CASTING GLASS. |
CH626282A5 (en) * | 1976-12-29 | 1981-11-13 | Langenecker Bertwin | Method and apparatus for the treatment of metal and metal-alloy melts by means of macrosonic sound |
JPS60203341A (en) * | 1984-03-26 | 1985-10-14 | Kobe Steel Ltd | Vibration-free continuous casting method of steel |
AT379335B (en) * | 1984-05-10 | 1985-12-27 | Voest Alpine Ag | FURNISHING ON A CONTINUOUS CASTING SYSTEM WITH AN OSCILLATING CONTINUOUS CHOCOLATE SUSPENDED OR SUPPORTED ON A FIXED POST |
FR2570626B1 (en) * | 1984-09-26 | 1987-05-07 | Siderurgie Fse Inst Rech | METHOD FOR VIBRATION OF A CONTINUOUS CASTING LINGOTIERE IN ORDER TO REDUCE THE FRICTION COEFFICIENT IN THIS LINGOTIERE AND LINGOTIERE FOR THE IMPLEMENTATION OF THIS PROCESS |
DE3543790A1 (en) * | 1985-12-09 | 1987-06-11 | Mannesmann Ag | OSCILLATION DEVICE |
EP0325931B1 (en) * | 1988-01-28 | 1992-04-22 | Clecim | Method and apparatus for the oscillation of a continuous-casting mould |
FR2648063B1 (en) * | 1989-06-12 | 1994-03-18 | Irsid | METHOD AND DEVICE FOR VIBRATION OF A CONTINUOUS CASTING LINGOTIERE OF METALS |
DE4132189C1 (en) * | 1991-09-27 | 1993-02-04 | Wieland-Werke Ag, 7900 Ulm, De | Metal strip prodn. - by feeding molten metal from tundish via casting nozzle onto cooled conveyor belt |
DE4240849A1 (en) * | 1992-12-04 | 1994-06-09 | Didier Werke Ag | Process for forming a separation gap, especially in metallurgy |
DE19512209C1 (en) * | 1995-03-21 | 1996-07-18 | Mannesmann Ag | Appts. for delivering metal melt into continuous casting mould |
IT1288901B1 (en) * | 1996-05-13 | 1998-09-25 | Danieli Off Mecc | CONTINUOUS CASTING PROCESS WITH BUTTON MAGNETIC FIELD AND RELATIVE CRYSTALLIZER FOR CONTINUOUS CASTING |
-
1998
- 1998-05-15 DE DE19823361A patent/DE19823361A1/en not_active Ceased
-
1999
- 1999-04-26 WO PCT/DE1999/001273 patent/WO1999059749A1/en active IP Right Grant
- 1999-04-26 EP EP99929058A patent/EP1077781B1/en not_active Expired - Lifetime
- 1999-04-26 AT AT99929058T patent/ATE224781T1/en not_active IP Right Cessation
- 1999-04-26 DE DE59902850T patent/DE59902850D1/en not_active Expired - Fee Related
- 1999-04-26 AU AU46012/99A patent/AU4601299A/en not_active Abandoned
- 1999-04-26 ES ES99929058T patent/ES2181450T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9959749A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59902850D1 (en) | 2002-10-31 |
WO1999059749A1 (en) | 1999-11-25 |
AU4601299A (en) | 1999-12-06 |
ATE224781T1 (en) | 2002-10-15 |
ES2181450T3 (en) | 2003-02-16 |
EP1077781B1 (en) | 2002-09-25 |
DE19823361A1 (en) | 1999-11-25 |
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