US20090199993A1 - Cooled continuous casting mold - Google Patents

Cooled continuous casting mold Download PDF

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Publication number
US20090199993A1
US20090199993A1 US11/579,377 US57937705A US2009199993A1 US 20090199993 A1 US20090199993 A1 US 20090199993A1 US 57937705 A US57937705 A US 57937705A US 2009199993 A1 US2009199993 A1 US 2009199993A1
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United States
Prior art keywords
casting
cooling
continuous casting
format
cooling channels
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
Application number
US11/579,377
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English (en)
Inventor
Hans Streubel
Jim Sears
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Assigned to SMS DEMAG AG reassignment SMS DEMAG AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEARS, JIM, STREUBEL, HANS
Publication of US20090199993A1 publication Critical patent/US20090199993A1/en
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SMS DEMAG AG
Abandoned legal-status Critical Current

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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 invention concerns a cooled continuous casting mold for casting metal, especially steel, with a casting format formed by two opposite wide sides and two opposite narrow sides.
  • the wide sides have a cooling zone designed for the maximum casting width with several cooling channels which extend in the direction of casting, are connected to a coolant circuit, and have inlet and outlet channels.
  • the narrow sides can be adjusted to set up the desired casting width.
  • the cooling system for the wide sides of the mold is designed for the maximum casting width.
  • the intensive mold cooling is also active outside the adjustable narrow side.
  • the cooling zone is thus wider than the actual casting width. Consequently, intensive cooling also occurs where there is no heat evolved by the strand.
  • the temperature along the wide sides can drop significantly in the vicinity of the narrow sides.
  • the temperature drop in the immediate vicinity of the narrow sides can be up to 200° C. or more.
  • the Japanese document JP 09 04 7848 discloses a continuous strip casting mold with narrow sides which can be moved back and forth along with blocking elements for cooling channels.
  • DE 41 27 333 C2 discloses a steel continuous casting mold with walls provided with several cooling channels that extend from top to bottom and are connected to a coolant water circuit, thereby forming a cooling zone that extends all the way across the wide sides.
  • the open cross section of the cooling channels be reduced by displacement rods in the region of the highest thermal stress of the mold, i.e., in the heating zone, in order to increase the flow rate of the cooling water and thus the rate of heat removal in these places.
  • the cooling channels and/or the inlet and/or outlet channels of the wide sides of the mold can be completely or at least partially blocked in the region within which the narrow sides can be adjusted and also in a region within which the narrow sides can be adjusted and also in a region which extends into the casting format.
  • the blocking can take place in the mold plate, in the steel intermediate plate of a cassette mold, and/or in the water box. The blocking can take place in the negative strip or the positive strip of the mold.
  • the blocking is meant to be possible between the region of the narrow side plates and the maximum cooling width. Blocking is also possible between a region close to the narrow side, which can extend beyond the actual narrow side into the casting format itself, and the maximum cooling width.
  • the temperature of the working face of the wide sides is evened out in the area of the narrow sides. Because of the more even temperature distribution on the working face of the wide sides in the region of the liquid steel level, the melting of the casting flux powder and thus the surface quality of the cast product are improved.
  • An advantage is obtained especially in the casting of small casting formats. Because the width cooled by water can be adjusted as a function of the format width, the amount of cooling medium required, especially the amount of water required, can be reduced and/or the water flow rate can be increased. This is important, especially at constant casting output, since higher water flow rates are possible at small casting widths and higher casting speeds. With the higher water flow rates, the heat transfer can be increased, and thus the temperature increase of the working face due to the higher casting speed can be at least partially compensated.
  • the cooling channels that extend at least over the region within which the narrow sides can be adjusted can be completely or partially blocked.
  • a uniform temperature distribution on the working face of the wide sides is obtained when the degree of blocking of the coolant flow decreases towards the center of the mold, i.e., when the blocking of the cooling channels decreases towards the center of the mold. This can be achieved if suitable blocking elements in the region near the narrow sides and/or in the casting format taper towards the center of the mold.
  • Water is the preferred coolant.
  • the most uniform temperature distribution is obtained when the water flow rate in the region of the cooling channels that can be partially blocked is a maximum of 25 m/s and a minimum of 0.5 m/s.
  • the water flow rate of the cooling channels in the cooling zone with cooling channels that are not blocked is a minimum of 0.5 m/s. This is achieved by suitably configured blocking elements.
  • the blocking of the individual cooling channels is achieved by blocking elements installed on the narrow-side support.
  • the blocking elements are preferably designed as pins that control the inlet or outlet of the individual cooling channels.
  • the blocking elements can be moved back and forth along with the associated narrow side or narrow-side support. First, the positions of the narrow sides are adjusted to obtain the desired casting format or casting width. Once the narrow sides are in their proper positions, the wide-side cooling channels in the vicinity of the narrow sides are at least partially blocked. This prevents these areas of the wide sides from being overcooled, which has an advantageous effect on the melting behavior of the casting flux powder and thus on the surface quality of the continuously cast product.
  • FIG. 1 shows a top view of a mold with wide sides and narrow sides and with means for adjusting the water-cooled width.
  • FIG. 2 shows a side view of a mold and a representation of the average working face temperature gradient below the liquid steel level in a mold with and without adjustment of the water-cooled width.
  • FIG. 1 shows a top view of a continuous casting mold 1 that consists of two opposite wide sides 2 , 3 and two opposite narrow sides 4 , 5 , which form the casting format for the given slab between them.
  • the positions of the narrow sides 4 , 5 between the wide sides 2 , 3 can be adjusted to set up a predetermined or desired casting format GF geg or a casting width. So that casting formats of maximum width can also be cast reliably, the cooling zone 6 of the wide sides 2 , 3 is designed to correspond to the maximum casting width.
  • the wide sides 2 , 3 have vertical cooling channels 7 in the form of bores, each of which is connected to a cooling water circuit by an inlet 8 and an outlet.
  • cooling water flows through all of the cooling channels 7 , and the wide sides 2 , 3 are cooled over the entire cooling zone 6 .
  • the cooling channels 7 and the inlets 8 are at least partially blocked in the region 9 .
  • the region of influence 9 can be made to extend beyond the positions to which the narrow sides have been adjusted and into the casting format itself.
  • cooling channels which are located beyond the actual narrow side plate and thus in the casting format itself are also blocked. It was determined that the partial blocking of the cooling channels can extend up to 100 mm per side into the casting format.
  • the cooling channels are at least partially blocked by blocking elements 10 , which are in the form of pins mounted on the support 11 of the narrow sides 4 , 5 and which thus can move back and forth along with the narrow side. They taper toward the center of the mold. As a result of this tapering end 12 , the blocking effect on the inlets of the channels decreases toward the center of the mold.
  • FIG. 2 shows a side view of a mold with the two narrow sides 4 , 5 and a representation of the average working face temperature gradient below the liquid steel level in a mold with ( 13 a ) and without ( 13 b ) adjustment of the cooling water width in accordance with the invention.
  • the liquid steel level is labeled 14 .
  • the cooling zone 6 extends over the entire wide side of the mold, the cooling action can be reduced or completely blocked in certain areas depending on the positions of the narrow sides. Reducing or blocking the cooling in the area between the maximum casting format and the displaced narrow sides 4 , 5 has the positive effect of evening out the temperature of the working face below the level of the liquid steel.
  • the working face temperature thus remains constant as far as the narrow sides, whereas, without the inventive influence on the cooling action, the working face temperature drops sharply as it approaches the narrow sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US11/579,377 2004-05-04 2005-04-25 Cooled continuous casting mold Abandoned US20090199993A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004021899A DE102004021899A1 (de) 2004-05-04 2004-05-04 Gekühlte Stranggießkokille
DE10-2004-021-899.4 2004-05-04
PCT/EP2005/004413 WO2005107978A2 (de) 2004-05-04 2005-04-25 Gekühlte stranggiesskokille

Publications (1)

Publication Number Publication Date
US20090199993A1 true US20090199993A1 (en) 2009-08-13

Family

ID=34978789

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/579,377 Abandoned US20090199993A1 (en) 2004-05-04 2005-04-25 Cooled continuous casting mold

Country Status (8)

Country Link
US (1) US20090199993A1 (de)
EP (1) EP1742751B1 (de)
JP (1) JP4819038B2 (de)
CN (1) CN100431739C (de)
AT (1) ATE473821T1 (de)
DE (2) DE102004021899A1 (de)
RU (1) RU2379155C2 (de)
WO (1) WO2005107978A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO347543B1 (en) * 2008-11-21 2023-12-27 Norsk Hydro As Støpeutstyr for støping av valseblokk
US8662145B2 (en) * 2012-03-22 2014-03-04 Novelis Inc. Method of and apparatus for casting metal slab

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627027A (en) * 1969-10-06 1971-12-14 Wiener Schwachstromwerke Gmbh Casting mold assembly for casting continuous strip
US4640337A (en) * 1985-05-01 1987-02-03 Gus Sevastakis Continuous casting apparatus
US4759400A (en) * 1985-10-03 1988-07-26 Kawasaki Steel Corporation Belt type cast sheet continuous caster and prevention of melt leakage in such a caster
US4825935A (en) * 1986-12-10 1989-05-02 Kawasaki Steel Corporation Cooling pad arrangement for belt caster type continuous casting device
US5771958A (en) * 1995-09-14 1998-06-30 Ag Industries, Inc. Mold for continuous casting system
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63203255A (ja) * 1987-02-20 1988-08-23 Hitachi Ltd ベルト式連続鋳造機
JP2922252B2 (ja) * 1990-04-18 1999-07-19 川崎製鉄株式会社 連続鋳造設備用モールド
JPH04178246A (ja) * 1990-11-13 1992-06-25 Nkk Corp 組立鋳型
DE4127333C2 (de) * 1991-08-19 2000-02-24 Schloemann Siemag Ag Stahlstranggießkokille
DE4403050C1 (de) * 1994-01-28 1995-09-28 Mannesmann Ag Stranggießkokille zum Führen von Strängen
JP3117391B2 (ja) * 1995-08-02 2000-12-11 三菱重工業株式会社 ベルト式連続鋳造装置
JPH10128513A (ja) * 1996-10-30 1998-05-19 Sumitomo Metal Ind Ltd 連続鋳造用分割鋳型
CN2290433Y (zh) * 1997-01-29 1998-09-09 原守喜 一种提高连铸拉速的冷却器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627027A (en) * 1969-10-06 1971-12-14 Wiener Schwachstromwerke Gmbh Casting mold assembly for casting continuous strip
US4640337A (en) * 1985-05-01 1987-02-03 Gus Sevastakis Continuous casting apparatus
US4759400A (en) * 1985-10-03 1988-07-26 Kawasaki Steel Corporation Belt type cast sheet continuous caster and prevention of melt leakage in such a caster
US4825935A (en) * 1986-12-10 1989-05-02 Kawasaki Steel Corporation Cooling pad arrangement for belt caster type continuous casting device
US5771958A (en) * 1995-09-14 1998-06-30 Ag Industries, Inc. Mold for continuous casting system
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die

Also Published As

Publication number Publication date
DE502005009905D1 (de) 2010-08-26
CN100431739C (zh) 2008-11-12
JP4819038B2 (ja) 2011-11-16
WO2005107978A3 (de) 2005-12-29
DE102004021899A1 (de) 2005-12-01
ATE473821T1 (de) 2010-07-15
RU2006142701A (ru) 2008-06-10
EP1742751A2 (de) 2007-01-17
RU2379155C2 (ru) 2010-01-20
CN1972771A (zh) 2007-05-30
WO2005107978A2 (de) 2005-11-17
EP1742751B1 (de) 2010-07-14
JP2007536091A (ja) 2007-12-13

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AS Assignment

Owner name: SMS DEMAG AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STREUBEL, HANS;SEARS, JIM;REEL/FRAME:021538/0670;SIGNING DATES FROM 20060907 TO 20061114

AS Assignment

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342

Effective date: 20090325

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342

Effective date: 20090325

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION