US20020129922A1 - Mold for continuous casting of strands - Google Patents
Mold for continuous casting of strands Download PDFInfo
- Publication number
- US20020129922A1 US20020129922A1 US10/045,401 US4540101A US2002129922A1 US 20020129922 A1 US20020129922 A1 US 20020129922A1 US 4540101 A US4540101 A US 4540101A US 2002129922 A1 US2002129922 A1 US 2002129922A1
- Authority
- US
- United States
- Prior art keywords
- mold
- gap
- cooling medium
- pouring spout
- set forth
- 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.)
- Abandoned
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 11
- 239000002826 coolant Substances 0.000 claims abstract description 29
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
Definitions
- the present invention relates to a mold for continuous casting of strands, in particular billet or bloom strands, and including a pouring spout, and a housing surrounding the pouring spout at a distance therefrom, forming with the pouring spout a gap that provides for flow of cooling medium therethrough.
- s is a thickness of the strand shell
- k is a cooling coefficient
- t is time.
- the heat removal from the mold can be regulated by controlling local water flow velocities.
- the maximal heat removal should take place in the meniscus of the mold bath mirror. At the outlet of the mold a correspondingly smaller amount of heat is removed.
- German Publication DE-OS 14 83 556 discloses distribution of cooling zones along the mold height, with the zones being located one above the other and with each cooling zone having its own delivery and removal conduits.
- German Patent No. 1.608,059 discloses flow of a cooling medium in vertical channels from beneath upward through the cooling boxes of the mold, with a high counter pressure.
- An object of the present invention is to provide a mold for continuous casting of strands and in which, the flow velocity of the cooling medium in the cooling channels of the cooling jacket of the mold is controlled by selecting an appropriate geometry of the cooling medium guiding jacket.
- the water flow velocity and, thereby, the removal of heat is controlled by an appropriate selection of the geometry of the cooling medium channel.
- At least a vertical profile of the outer wall of the cooling medium wall corresponds to a reverse shape of a solidification line in the cast strand running from above downward.
- the reverse shape results in low cooling medium velocities in the lower region of the mold and in high cooling medium velocities in the upper region of the mold which are caused by the narrowing of the gap.
- a further improvement in the geometry of the cooling medium gap is achieved by additionally increasing its size in its corner regions. Because the corners of a strand require less heat removal than the surfaces of the strand, the cooling medium flow velocity can be reduced in the corner regions of the gap.
- the gap has a different width along at least one of wide side of the mold and longitudinal side of the mold with a narrowest width being provided in a middle of the at least one of wide side and longitudinal side.
- a favorable flow, with a reduced flow resistance, is achieved by forming the corner regions, in a horizontal plane, with an oval-shaped bulging profile.
- FIG. 1 a vertical cross-sectional view of a mold for continuous casting according to the present invention.
- FIG. 2 a horizontal cross-sectional view along line A-A in FIG. 1.
- a mold for continuous casting according to the present invention which is shown in FIGS. 1 - 2 , is used in particular for casting billet and bloom strands.
- the mold includes a pouring spout 1 and a mold housing 2 which form together a water jacket 2 a.
- the cooling medium 4 usually water or water with additives, is fed through a vertical cooling medium gap 5 between the pouring spout 1 and the housing 2 and, after being heated upon rising, is removed. As shown with arrows in FIGS. 1 - 2 , the cooling water is introduced into the gap 5 at the lower mold region 6 b and is removed at the top or upper mold region 6 a.
- the width of the cooling medium gap 5 changes along the mold height. As shown in the drawings, the width of the cooling medium gap 5 narrows toward the top of the mold, leading to an increase of cooling medium velocity in the upper region 6 a of the mold. In the lower mold region 6 b, the cooling medium gap 5 is relatively wide which results in a relatively small velocity of the cooling medium in the lower region 6 b of the mold.
- the flow velocity of the cooling medium 4 corresponds to a reversed shape of the solidification line in the cast strand and to the profile 7 (FIG. 1) of the inner wall 5 a of the mold housing 2 defining, together with the outer wall of the pouring spout 1 , the cooling medium gap 5 .
- the cooling medium gap 5 has increased dimensions in corner regions 8 .
- the cooling medium gap 5 can have a different width along the mold wide side 9 , the mold longitudinal side 10 , and along both the mold wide side 9 and the mold longitudinal side 10 , with the narrowest width 11 being provided in the middle 12 of the wide or/and longitudinal side(s).
- the pouring spout 1 can be easily and precisely produced because only the mold housing 2 has a changing profile 7 .
- the formation of the corner regions 8 with respective oval profiles 13 (in the horizontal projection) also does not affect the profile of the pouring spout 1 .
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a mold for continuous casting of strands, in particular billet or bloom strands, and including a pouring spout, and a housing surrounding the pouring spout at a distance therefrom, forming with the pouring spout a gap that provides for flow of cooling medium therethrough.
- 2. Description of the Prior Art
- During continuous casting of metals, in particular during continuous casting of steel, the liquid steel solidifies, in the course of the casting process, in a continuous casting mold from above downward. The solidification takes place approximately hyperbolically in accordance with an equation
- s=k×{square root}{square root over (t)}, wherein
- s is a thickness of the strand shell;
- k is a cooling coefficient; and
- t is time.
- In order to provide for the above-determined solidification curve already in the continuous casting mold, the heat removal from the mold can be regulated by controlling local water flow velocities. The maximal heat removal should take place in the meniscus of the mold bath mirror. At the outlet of the mold a correspondingly smaller amount of heat is removed.
- German Publication DE-OS 14 83 556 discloses distribution of cooling zones along the mold height, with the zones being located one above the other and with each cooling zone having its own delivery and removal conduits.
- German Patent No. 1.608,059 discloses flow of a cooling medium in vertical channels from beneath upward through the cooling boxes of the mold, with a high counter pressure.
- An object of the present invention is to provide a mold for continuous casting of strands and in which, the flow velocity of the cooling medium in the cooling channels of the cooling jacket of the mold is controlled by selecting an appropriate geometry of the cooling medium guiding jacket.
- This and other objects of the present invention, which will become apparent hereinafter, are achieved by providing a gap having a small width in an upper mold region and corresponding to a high cooling medium velocity, and a relatively large width in a lower mold region and corresponding to a relatively low velocity of the cooling medium.
- Thus, according to the present invention, the water flow velocity and, thereby, the removal of heat is controlled by an appropriate selection of the geometry of the cooling medium channel.
- According to the present invention, at least a vertical profile of the outer wall of the cooling medium wall corresponds to a reverse shape of a solidification line in the cast strand running from above downward. The reverse shape results in low cooling medium velocities in the lower region of the mold and in high cooling medium velocities in the upper region of the mold which are caused by the narrowing of the gap.
- A further improvement in the geometry of the cooling medium gap is achieved by additionally increasing its size in its corner regions. Because the corners of a strand require less heat removal than the surfaces of the strand, the cooling medium flow velocity can be reduced in the corner regions of the gap.
- According to the present invention, the gap has a different width along at least one of wide side of the mold and longitudinal side of the mold with a narrowest width being provided in a middle of the at least one of wide side and longitudinal side. By providing the smallest width in the middle of a respective side or sides, an increase of the cooling medium flow velocity is achieved in this region in comparison with corner regions. The reduced velocity in the corner regions is obtained as a result of providing a bulged profile in this regions.
- Forming the pouring spout according to the present invention as a cylindrical member simplifies the manufacturing of the mold.
- A favorable flow, with a reduced flow resistance, is achieved by forming the corner regions, in a horizontal plane, with an oval-shaped bulging profile.
- The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to is construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of preferred embodiments, when read with reference to the accompanying drawings.
- In the Drawings:
- FIG. 1 a vertical cross-sectional view of a mold for continuous casting according to the present invention; and
- FIG. 2 a horizontal cross-sectional view along line A-A in FIG. 1.
- A mold for continuous casting according to the present invention which is shown in FIGS.1-2, is used in particular for casting billet and bloom strands. The mold includes a
pouring spout 1 and amold housing 2 which form together awater jacket 2 a. Thecooling medium 4, usually water or water with additives, is fed through a verticalcooling medium gap 5 between thepouring spout 1 and thehousing 2 and, after being heated upon rising, is removed. As shown with arrows in FIGS. 1-2, the cooling water is introduced into thegap 5 at thelower mold region 6 b and is removed at the top orupper mold region 6 a. - According to the present invention, the width of the
cooling medium gap 5 changes along the mold height. As shown in the drawings, the width of thecooling medium gap 5 narrows toward the top of the mold, leading to an increase of cooling medium velocity in theupper region 6 a of the mold. In thelower mold region 6 b, thecooling medium gap 5 is relatively wide which results in a relatively small velocity of the cooling medium in thelower region 6 b of the mold. The flow velocity of thecooling medium 4 corresponds to a reversed shape of the solidification line in the cast strand and to the profile 7 (FIG. 1) of theinner wall 5 a of themold housing 2 defining, together with the outer wall of thepouring spout 1, thecooling medium gap 5. - As shown in FIG. 2, the
cooling medium gap 5 has increased dimensions incorner regions 8. Thecooling medium gap 5 can have a different width along the moldwide side 9, the moldlongitudinal side 10, and along both the moldwide side 9 and the moldlongitudinal side 10, with thenarrowest width 11 being provided in themiddle 12 of the wide or/and longitudinal side(s). - The
pouring spout 1 can be easily and precisely produced because only themold housing 2 has a changingprofile 7. The formation of thecorner regions 8 with respective oval profiles 13 (in the horizontal projection) also does not affect the profile of thepouring spout 1. - The respective gap width follows the functions gap width=f(h) according to FIG. 1, and gap width=f(x) according to FIG. 2.
- Though the present invention was shown and described with references to the preferred embodiment, such are merely illustrative of the present invention and are not to be construed as a limitation thereof, and various modifications to the present invention will be apparent to those skilled in the art. It is, therefore, not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all of variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10056910A DE10056910A1 (en) | 2000-11-16 | 2000-11-16 | Billet and block mold with partially regulated heat dissipation over the mold circumference and mold height |
DE10056910.2 | 2000-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020129922A1 true US20020129922A1 (en) | 2002-09-19 |
Family
ID=7663584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/045,401 Abandoned US20020129922A1 (en) | 2000-11-16 | 2001-11-16 | Mold for continuous casting of strands |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020129922A1 (en) |
EP (1) | EP1206986B1 (en) |
AT (1) | ATE340666T1 (en) |
DE (2) | DE10056910A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060102313A1 (en) * | 2002-06-13 | 2006-05-18 | Gereon Fehlemann | Continuous casting mold for liquid metals, especially for liquid steel |
US20080073483A1 (en) * | 2005-08-27 | 2008-03-27 | Hans Streubel | Unknown |
US20100000704A1 (en) * | 2006-08-05 | 2010-01-07 | Hans Streubel | Extrusion die for liquid metals, in particular for liquid |
CN108838352A (en) * | 2018-05-25 | 2018-11-20 | 中冶连铸技术工程有限责任公司 | A kind of crystallizer of double water jacket structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10201502C1 (en) * | 2001-10-18 | 2003-04-24 | Sms Demag Ag | Optimizing cooling capacity of continuous steel-casting mold, adjusts flow velocity of coolant and available cross section, as function of height in mold |
TWI268821B (en) * | 2002-04-27 | 2006-12-21 | Sms Demag Ag | Adjustment of heat transfer in continuous casting molds in particular in the region of the meniscus |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5970442A (en) * | 1982-10-12 | 1984-04-20 | Mishima Kosan Co Ltd | Mold for continuous casting |
JPH0342144A (en) * | 1989-07-06 | 1991-02-22 | Kawasaki Steel Corp | Method for cooling mold for continuous casting and mold thereof |
JPH03118943A (en) * | 1989-09-29 | 1991-05-21 | Kawasaki Steel Corp | Mold and method for continuously casting low and medium carbon steel |
-
2000
- 2000-11-16 DE DE10056910A patent/DE10056910A1/en not_active Withdrawn
-
2001
- 2001-10-26 DE DE50111083T patent/DE50111083D1/en not_active Expired - Lifetime
- 2001-10-26 EP EP01125595A patent/EP1206986B1/en not_active Expired - Lifetime
- 2001-10-26 AT AT01125595T patent/ATE340666T1/en active
- 2001-11-16 US US10/045,401 patent/US20020129922A1/en not_active Abandoned
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060102313A1 (en) * | 2002-06-13 | 2006-05-18 | Gereon Fehlemann | Continuous casting mold for liquid metals, especially for liquid steel |
US7363958B2 (en) * | 2002-06-13 | 2008-04-29 | Sms Demag Ag | Continuous casting mold for liquid metals, especially for liquid steel |
US20080073483A1 (en) * | 2005-08-27 | 2008-03-27 | Hans Streubel | Unknown |
US7798202B2 (en) * | 2005-08-27 | 2010-09-21 | Sms Siemag Aktiengesellschaft | Wide side of a funnel mold |
US20100000704A1 (en) * | 2006-08-05 | 2010-01-07 | Hans Streubel | Extrusion die for liquid metals, in particular for liquid |
CN108838352A (en) * | 2018-05-25 | 2018-11-20 | 中冶连铸技术工程有限责任公司 | A kind of crystallizer of double water jacket structure |
Also Published As
Publication number | Publication date |
---|---|
DE10056910A1 (en) | 2002-05-29 |
EP1206986A1 (en) | 2002-05-22 |
DE50111083D1 (en) | 2006-11-09 |
ATE340666T1 (en) | 2006-10-15 |
EP1206986B1 (en) | 2006-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4635702A (en) | Mold for continuous casting of steel strip | |
CA2588521C (en) | Continuous steel casting installation for billet and bloom formats | |
US5467809A (en) | Liquid-cooled ingot mold for the continuous casting of steel billets in the form of slabs | |
US4865115A (en) | Pouring device for dual-roll type continuous casting machines | |
JP4665056B1 (en) | Immersion nozzle | |
US20020129922A1 (en) | Mold for continuous casting of strands | |
US6367539B1 (en) | Crystalliser for continuous casting | |
AU757475B2 (en) | High speed continuous casting device and relative method | |
CA1315522C (en) | Continuous casting mould for producing thin ingots | |
KR101320353B1 (en) | Device for generating ultrasonic wave of submerged type | |
US5941298A (en) | Optimized shapes of continuous casting molds and immersion outlets for casting slabs of steel | |
CA2694755C (en) | Process for producing steel long products by continuous casting and rolling | |
MXPA03000876A (en) | Chill tube. | |
CN1325196C (en) | Continuous casting mold for casting molten metals, particularly steel materials, at high casting rates to form polygonal billet, bloom, and preliminary section castings and the like | |
ATE195450T1 (en) | CONTINUOUS CASTING MOLD WITH IMPROVED HEAT EXCHANGE AND METHOD FOR INCREASE THE HEAT EXCHANGE OF A CONTINUOUS CASTING MOLD | |
CN1160369A (en) | Immersed pouring spout | |
RU2121903C1 (en) | Process of manufacture of thin flat ingots and gear for its realization | |
CN112916827B (en) | Multiple gating system of die-casting mould | |
US4033404A (en) | Oscillatory mold equipped with a hollow mold cavity which is curved in the direction of travel of the strand | |
JP2000218345A (en) | Mold plate equipped with funnel-like casting area for continuous casting of metal | |
JP3320040B2 (en) | Continuous casting mold | |
SK166399A3 (en) | Method and device for producing slabs | |
US5095970A (en) | Continuous-casting mold for vertically casting metal strip | |
RU2152843C1 (en) | Sleeve-type mold for high-speed continuous casting | |
EP1934003B1 (en) | Ingot mold for casting slabs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SMS DEMAG AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PLOCIENNIK, UWE;ZAJBER, ADOLF;REEL/FRAME:012997/0734 Effective date: 20020416 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AKTIENGESELLSCHAFT;REEL/FRAME:022816/0807 Effective date: 20090325 Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AKTIENGESELLSCHAFT;REEL/FRAME:022816/0807 Effective date: 20090325 |