EP1286795A1 - Device for continuously casting metal, particularly steel - Google Patents
Device for continuously casting metal, particularly steelInfo
- Publication number
- EP1286795A1 EP1286795A1 EP01943393A EP01943393A EP1286795A1 EP 1286795 A1 EP1286795 A1 EP 1286795A1 EP 01943393 A EP01943393 A EP 01943393A EP 01943393 A EP01943393 A EP 01943393A EP 1286795 A1 EP1286795 A1 EP 1286795A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- steel
- wall
- support grid
- mold wall
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 title claims description 17
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims abstract description 40
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000010949 copper Substances 0.000 claims description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000002826 coolant Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 4
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 2
- 230000001143 conditioned effect Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001494479 Pecora Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect 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
- B22D11/055—Cooling the moulds
-
- 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
- B22D11/059—Mould materials or platings
Definitions
- the invention relates to a device for the continuous casting of metal, in particular steel, with a mold with mold walls and with a mold cooling device.
- a device for the continuous casting of metal, in particular steel, with a mold with mold walls and with a mold cooling device.
- Such a device is used to cast different strand formats, such as slabs, thin slabs, blooms or beam blanks (beam pre-profiles).
- the mold itself or the strand - as with horizontal continuous casting - can oscillate.
- the mold itself is arranged in one place and can therefore also be referred to as a stand mold.
- Such molds as a casting mold for continuous casting plants consist either of mold plates, namely two plates for the wide mold and two plates for the narrow sides of the mold, or of mold tubes.
- mold plates or mold tubes are made of copper and generally have a thickness of 10 to 50 mm between the water cooling and the side facing the molten steel.
- the choice of copper plate thickness depends on the heat loads or the heat flow, measured for example in MWh / m 2 or MW / m 2 .
- the thickness of the copper plates of the mold is between 25 and 50 mm.
- thin slabs which are operated at casting speeds of up to 10 and in the future up to 15 m / min, have a maximum heat flow of 4-5 MW / m 2 and copper plate thicknesses of 10 to 25 mm.
- the copper wall In order to do justice to the increasing heat flow with increasing casting speed, the copper wall would have to become ever thinner as the Water cooling. This is difficult, as thinner mold walls can withstand the high water pressures of 5-15 bar, which ensure a corresponding water speed of 5-15m / s, without deformation.
- too thinly formed copper plates lose strength when the cold-rolled copper is subjected to too high a thermal load when the recrystallization temperature is exceeded.
- the mold plates are usually mounted on the water boxes or the mold frame by means of bolts which are screwed into the back of the copper plate by means of a thread. This is no longer possible with very thin plates; here the bolts have to be welded onto the copper plates.
- the invention has for its object to develop a device of the generic type in such a way that the above-mentioned disadvantages no longer occur despite increasing the casting speeds.
- a device for continuous casting with a mold is to be created, which can transport away high heat flows and can withstand high thermal loads.
- the assembly should also be improved.
- At least one mold wall comprises a steel mold wall and a support grid for this steel mold wall, that a magnetic field generator is provided for generating a magnetic field which acts on the steel mold wall via the support grid and thus pulls the steel mold wall onto the support grid, and that the mold cooling device is one Spray cooling includes.
- such a mold has the particular advantage that the steel mold wall exposed to wear and tear, as opposed to a more expensive copper plate, can be replaced quickly and easily without high-quality processing, if necessary, by "throwing away" the used one, ie feeding it back to the steel recycling process becomes.
- a simple and less expensive mold spray cooling can be used.
- the spray cooling acts in the open chambers or passages left by the support grid, ie the thin steel mold wall is cooled immediately, but nevertheless experiences a relatively high support effect.
- Spray water can be used for spray cooling.
- the solution according to the invention creates a mold which has heat conduction, which would otherwise require a copper plate thickness of approximately 10 mm or more, which can be easily mounted on a base frame and which allows mold cooling on the water side and at the same time is inexpensive.
- the steel mold wall proposed according to the invention preferably has a thickness of between 0.5 and 5 mm, the effect of a copper plate corresponds to the thickness of 10 mm, but has constructive advantages and price advantages.
- the support grid preferably has a support wall with chambers inserted therein, ie the individual chambers or openings in the grid are surrounded by the wall webs of the support wall, the magnetic field being introduced into the mold wall via the support walls.
- the spray cooling for cooling the mold walls preferably comprises spray nozzles which in the chambers of the support grid have the steel mold wall on the back, i.e. cool through the freely accessible chamber areas or gaps in the grid.
- These spray nozzles of the mold spray cooling and the feeds for the cooling medium, in particular water, are fully or partially integrated in the supporting walls of the supporting grid.
- the support grid or the support walls are thick in relation to the steel mold wall.
- the proposed spray cooling has the advantage that the intensity of the spray cooling can be adjusted functionally to the energy profile in the mold wall via the mold height. This energy curve shows a heat maximum in the upper third of the mold.
- the intensity of the cooling can be adjusted in a controlled manner by spray cooling by means of individual nozzles arranged one above the other and can thus be adapted to an energy profile with an energy maximum or an energy lobe by cooling more intensely at this point.
- a further development of the device suggests that a device for checking the surface temperature of the side of the steel mold wall facing the liquid metal is provided, in order to adapt the spray cooling to fluctuations in the surface temperature via a control mechanism.
- the mold plate can also be mechanically fixed.
- a fixing device is proposed for fixing the steel mold wall, for example a broad side in the middle of the broad side above the Mold height.
- the steel mold wall can be fixed horizontally at the mold entrance or at the mold exit.
- the narrow sides can also be fixed, if they are also stabilized with a support grid.
- the support walls of the support grid are at their ends facing the steel mold wall, i.e. at the head or at their head, are equipped with balls that serve as (ball) bearings for free, thermally induced, movement of the steel mold wall.
- the balls are supplied with a fluid medium, for example water or gas.
- lines are introduced into the support walls, which extend perpendicular to the steel mold wall and which supply the balls or the ball cages on the end faces of the support walls with water or gas.
- the support grid should include an outer frame with a seal encompassing the grid.
- the used cooling medium can either drain freely, i.e. drain in an open atmosphere, or drain directed.
- a collecting chamber is preferably provided on the lower part of the mold wall, which opens into a drain in order to bring the cooling water to a treatment plant if necessary.
- the cooling medium which has flowed back via the support grid walls, here in particular via a wall part of the support grid arranged at the bottom of a spray nozzle, is collected in the collecting chamber and discharged via the outlet.
- Fig. 1a is a side view of a mold wall of a mold, here one
- Fig. 1 b is a transverse view of the mold wall of Fig. 1 a;
- FIG. 2a shows a transverse view of a mold wall with spray cooling, which is attached to the
- 3a shows a sectional view of a mold with a sheep's side wall and with a snap side body for width and conicity adjustment;
- Support walls for storing the steel mold wall on the support grid are provided.
- the broad mold side 1 of a mold which has two broad and two narrow sides, and is suitable for casting rectangular formats, such as slabs or thin slabs.
- This broad mold side consists, for example, of a 2 mm thick steel mold wall 2.
- the steel mold wall 2 which is part of an overall mold wall, is created with the aid of a magnetic field 3.1, which is built up by a magnetic field generator 3.2 and which acts on the steel mold wall 2 via a support grid 3 with support walls 11 , pulled onto the support grid 3.
- the steel mold wall 2 is preferably a layered steel mold wall 2.1 which consists, for example, of the layers steel / copper or also copper / steel / copper or other metals instead of the copper.
- the magnetic field generator can preferably be a permanent magnet 3.4.
- the steel mold wall 2 of 2 mm thickness corresponds with its specific thermal conductivity to a copper wall of about 14 mm.
- a device 4.1 (shown schematically here) is provided which side with the width 17 and a height 16 fixed in the vertical center line 4, whereby thermal expansion can migrate in half symmetrically in both horizontal directions (here with arrows and reference number 5).
- the steel mold wall is also fixed on its upper edge 6 or lower edge 7 of the mold in order to be able to expand thermally uniformly in the vertical direction (here designated with a vertical arrow and reference number 8).
- the embodiment shown here is rod-shaped elements which can be rotated about their longitudinal axis.
- the back of the steel mold wall 2 is cooled in the chambers 9 of the support grid 3 or the gaps or openings, with the aid of mold spray cooling 10, which comprises spray nozzles, as shown in FIG. 1b shows.
- the heated cooling water or return spray water 10.2 can flow freely over the support grid walls 11 or support wall struts.
- the spray water can be collected in a closed room or a collecting chamber 12 in order to be discharged via a drain 12.1, or can be discharged in an open atmosphere 13 (cf. FIG. 3a).
- the outer frame of the rectangular, magnetized support grid 3.1 is provided all around with a rubber seal 3.3 in order to prevent the mold spray water 10 from uncontrolled escape.
- the support walls 11 of the support grid 3 are equipped in the head regions 11.1 with balls 11.2, which serve as normal bearings or as fluid bearings for the free, thermally induced movement of the steel mold wall 2.
- Examples of the bearing points or balls 11.2 are shown in Fig. 1a.
- the support grid heads 11.1 can also consist of rounded graphite heads 11.1.1 which are intended to promote the thermally induced sliding process.
- 3b shows a detailed view of the embodiment of the ball bearing. It is a section of a support wall 11 with a support wall head 11.1 with a ball 11.2 received by the head 11.1 for mounting the steel mold wall 2 or
- the ball bearing cage is supplied with a fluid 11.3, such as water or gas, via a line, which is used to build up a fluid bearing or hydraulic bearing.
- a fluid 11.3 such as water or gas
- the spray nozzles 10.1 acting between the support walls 11 or the webs of the grating 3 are also shown.
- Fig. 2a illustrates the use of the device according to the invention for continuous casting or mold with an immersion spout 23.2 which protrudes into the mold.
- 24 is pouring slag, with 24.1 casting powder.
- the liquid steel 23.1 is poured into the mold via the immersion spout 23.2, the solidification beginning with the formation of a strand shell 23 on the mold walls.
- the casting speed v c is marked with 25. That by the magnetic field generator
- the mold wall temperature is shown at 15 on the side of the mold facing the liquid steel.
- a corresponding measuring or control device is provided for measuring the temperature.
- 2a also shows the embodiments of the mounting with balls 11.2 integrated in the head of the support walls 3 or with rounded heads, preferably made of graphite 11.1.1.
- a type of storage is preferably used, but it is also covered by the invention that the support wall is provided with both types of storage.
- the return spray water 10.2 is not collected, but flows openly downward, where it is then collected below the mold, if necessary.
- the spray cooling or the parameters of the individual spray nozzles can be adapted to the cooling requirements of the mold required in each case.
- FIG. 2b therefore shows the energy lobe 14 occurring over the mold height, ie a maximum of heat released in the upper third of the mold.
- the mold wall temperature 15 is measured and the spray cooling is adjusted accordingly over the mold height.
- the narrow sides of the mold are designed according to the invention, while the narrow sides are made of steel, but have no support grid. However, it is also covered by the invention that both the broad and narrow sides or only the narrow sides of the mold are designed according to the invention.
- the narrow sides 18 consist of steel.
- the narrow side 18 attains a high degree of stability through a slightly concave and / or internal convexity 18.1. It is mounted on the actual narrow side body 19, which permits a width adjustment 20 and conicity adjustment 21 of the mold.
- This type of construction allows a water pressure of up to 20 bar in the area of conventionally designed narrow side mold water cooling, here marked with 22.
- a water-displacing body is identified by 22.1.
- the narrow sides of the mold can also correspond to the prior art and consist of water-cooled copper plates. The components already explained in the other figures have corresponding reference numerals in FIG. 3a.
- the chambers 9 or openings of the support grid 3 can take any shape, rectangular shapes are shown, these chambers preferably have a honeycomb shape, these chambers 9 and 12, respectively extend between the support walls 11.
- a mold for continuous casting is created, which allows a high controlled heat conduction and simple assembly, in particular assembly of the steel mold wall.
- the steel mold temperature can be checked in the casting direction (vertical) as well as transversely to the casting direction (horizontal).
- the steel mold wall can serve as a type of disposable steel plate, which makes high-quality and expensive maintenance work in the event of wear and tear unnecessary.
- a relatively simple mold spray cooling can be used, the effect or intensity of which can be set functionally via the mold height to the energy lobe. Normal water spray can be used, the mold has a simple construction at a relatively low cost.
- fluid such as B. gas or water, which is used to build a fluid bearing or hydraulic bearing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10025026 | 2000-05-20 | ||
DE10025026 | 2000-05-20 | ||
DE10123053A DE10123053C2 (en) | 2000-05-20 | 2001-05-11 | Device for the continuous casting of metal, in particular steel |
DE10123053 | 2001-05-11 | ||
PCT/EP2001/005652 WO2001089741A1 (en) | 2000-05-20 | 2001-05-17 | Device for continuously casting metal, particularly steel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1286795A1 true EP1286795A1 (en) | 2003-03-05 |
EP1286795B1 EP1286795B1 (en) | 2003-12-17 |
Family
ID=26005760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01943393A Expired - Lifetime EP1286795B1 (en) | 2000-05-20 | 2001-05-17 | Device for continuously casting metal, particularly steel |
Country Status (8)
Country | Link |
---|---|
US (1) | US6776215B2 (en) |
EP (1) | EP1286795B1 (en) |
JP (1) | JP2003534134A (en) |
CN (1) | CN1430540A (en) |
AT (1) | ATE256514T1 (en) |
AU (1) | AU6598301A (en) |
RU (1) | RU2002134183A (en) |
WO (1) | WO2001089741A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008017374A1 (en) * | 2006-08-11 | 2008-02-14 | Sms Demag Ag | Die for continuous casting of liquid metal, in particular of steel materials |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4569715B1 (en) * | 2009-11-10 | 2010-10-27 | Jfeスチール株式会社 | Steel continuous casting method |
JP4807462B2 (en) * | 2009-11-10 | 2011-11-02 | Jfeスチール株式会社 | Steel continuous casting method |
US9688009B2 (en) * | 2014-09-25 | 2017-06-27 | GM Global Technology Operations LLC | Cellular materials based molds with lower cycle time |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1554170A (en) * | 1969-05-30 | 1971-12-02 | Con Casta. G | Apparatus for cooling a continuous steel casting |
US3933193A (en) | 1971-02-16 | 1976-01-20 | Alcan Research And Development Limited | Apparatus for continuous casting of metal strip between moving belts |
US4030537A (en) * | 1975-06-25 | 1977-06-21 | Southwire Company | Thin gauge casting wheel band |
CH613884A5 (en) | 1976-04-13 | 1979-10-31 | Escher Wyss Ag | |
CH624322A5 (en) * | 1977-03-04 | 1981-07-31 | Larex Ag | Device for cooling and guiding a revolving mould belt in a continuous casting installation |
JPH01218747A (en) * | 1988-02-29 | 1989-08-31 | Kawasaki Steel Corp | Continuous casting apparatus for cast strip |
JP2917524B2 (en) * | 1995-06-21 | 1999-07-12 | 住友金属工業株式会社 | Continuous casting of thin slabs |
US5967223A (en) * | 1996-07-10 | 1999-10-19 | Hazelett Strip-Casting Corporation | Permanent-magnetic hydrodynamic methods and apparatus for stabilizing a casting belt in a continuous metal-casting machine |
-
2001
- 2001-05-17 RU RU2002134183/02A patent/RU2002134183A/en not_active Application Discontinuation
- 2001-05-17 AT AT01943393T patent/ATE256514T1/en not_active IP Right Cessation
- 2001-05-17 EP EP01943393A patent/EP1286795B1/en not_active Expired - Lifetime
- 2001-05-17 JP JP2001585970A patent/JP2003534134A/en not_active Withdrawn
- 2001-05-17 CN CN01809835A patent/CN1430540A/en active Pending
- 2001-05-17 AU AU65983/01A patent/AU6598301A/en not_active Abandoned
- 2001-05-17 WO PCT/EP2001/005652 patent/WO2001089741A1/en active IP Right Grant
- 2001-05-17 US US10/276,937 patent/US6776215B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0189741A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008017374A1 (en) * | 2006-08-11 | 2008-02-14 | Sms Demag Ag | Die for continuous casting of liquid metal, in particular of steel materials |
Also Published As
Publication number | Publication date |
---|---|
EP1286795B1 (en) | 2003-12-17 |
WO2001089741A1 (en) | 2001-11-29 |
JP2003534134A (en) | 2003-11-18 |
AU6598301A (en) | 2001-12-03 |
CN1430540A (en) | 2003-07-16 |
ATE256514T1 (en) | 2004-01-15 |
RU2002134183A (en) | 2004-06-20 |
US20040099402A1 (en) | 2004-05-27 |
US6776215B2 (en) | 2004-08-17 |
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