EP1175947A1 - Paroi pour lingotière de coulée continue - Google Patents

Paroi pour lingotière de coulée continue Download PDF

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Publication number
EP1175947A1
EP1175947A1 EP01306470A EP01306470A EP1175947A1 EP 1175947 A1 EP1175947 A1 EP 1175947A1 EP 01306470 A EP01306470 A EP 01306470A EP 01306470 A EP01306470 A EP 01306470A EP 1175947 A1 EP1175947 A1 EP 1175947A1
Authority
EP
European Patent Office
Prior art keywords
end wall
mount
key
recess
accordance
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.)
Withdrawn
Application number
EP01306470A
Other languages
German (de)
English (en)
Inventor
Larry T. Birkner
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.)
Acme Steel Inc
Original Assignee
Acme Steel Inc
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 Acme Steel Inc filed Critical Acme Steel Inc
Publication of EP1175947A1 publication Critical patent/EP1175947A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/057—Manufacturing or calibrating 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 present invention relates to a mold used in a continuous caster.
  • the invention relates to a mold design in which the service life of the end walls is substantially improved.
  • molten steel is poured into a vertically oriented chamber in which the walls of the chamber are made of a material with high thermal conductance, such as copper or copper alloy.
  • the surface of the molten metal partially solidifies so that the material emerging from the bottom of the mold can be handled and further processed into sheet form.
  • the solidification of the molten metal as it passes through the mold results in higher amounts of wear in the lower portions of the mold where the molten metal is more solid than at upper portions of the mold.
  • the copper or copper alloy surfaces of the mold wear out more quickly at the lower end of the mold than at the upper end.
  • it is necessary to refurbish the walls of the mold by removing the face plates and end walls and machining them so that the copper surfaces of the mold components are smooth and able to efficiently remove heat from the molten steel as it passes through the mold.
  • the present invention is embodied in a mold for a continuous caster in which the end walls are designed so that they can be mounted in either of two alternative vertical orientations.
  • the design allows the end walls of a continuous casting mold to be switched end-to-end in order to maximize the service life of the end walls.
  • Figure 1 shows a mold frame 1 with a coolant path 2.
  • Each side of the mold frame 1 has a broad face plate 3 carried by face plate carriers 4.
  • the face plates 3 and face plate carriers 4 are spaced to form a cavity or chamber 5 into which molten steel is poured.
  • Steel in thin slab form with a still molten core exits through the lower portion of the mold frame 1.
  • End walls 10 are disposed between the broad face plates 3 at the sides of the face plates 3.
  • the end walls 10 are carried by end wall carriers 7.
  • Figure 2 shows an end wall carrier 7 pivotably mounted to a support 8.
  • the end wall 10a is an example of a prior art end wall mountable to the end wall support in only one position, the position shown in Figure 2.
  • the hot face 25 of the end wall 10a be substantially vertical.
  • Vertical alignment is important so that the slab made with the mold is aligned with the rollers through which the slab passes later in the process.
  • the vertical alignment of the end wall 10a is adjustable by operation of the screw and nut mechanism 9, which allows the upper part of the end wall carrier 7 to pivot about the upper pivot support 40, while the lower part of the end wall carrier 7 moves to the left or right as shown in Figure 2, and the lower part of the end wall carrier 7 pivots about the lower pivot support 41.
  • seven bolts 11 are used to hold the end wall 10a to the end wall carrier 7.
  • the bolts 11 extend through bolt holes 13 which run from the rear (or left side in Figure 2) of the carrier 7 through the carrier 7 and into the connection holes 24 in the mounting face of the end wall 10a.
  • the carrier 7 and end wall 10a are prevented from slipping vertically relative to one another by an upper round key 17.
  • the lower oblong key 15 prevents horizontal relative motion (i.e., slipping).
  • the temperature of the end wall 10a is monitored by two thermocouples which extend through the thermocouple passageways 19 and 21 in the upper portion of the end wall carriers 7 and into the mounting face 23 of the end wall 10a.
  • thermocouples extend into thermocouple openings 29 and 31 in the upper portion of the mounting face 23 and the end wall 10a, when the end wall is mounted in a first vertical orientation.
  • the thermocouple passageways 19 and 21 will align with openings the 39 and 41, and the thermocouples will, alternatively, extend into openings 39 and 41 (See Figure 6).
  • Figures 3 and 4 show an end wall carrier 7 to which an end wall 10 of the present invention may be mounted.
  • the end wall carrier several (a total of seven holes shown in Figures 3 and 4) bolt holes 13 which allow the carrier 7 to be bolted firmly to a support 8 (as shown in Figure 2).
  • the carrier 7 has two thermocouple guideways 33 and 34 which extend from the side of the end wall carrier 7 to the outer face 35 of the carrier 7 to which the end wall 10 may be mounted.
  • the carrier 7 has an upper round key location 17 and a lower oblong key location 15. Upper and lower fluid pathways 47 and 48, respectively, allow the coolant to be passed through the carrier 7 and to the end wall 10 mounted thereto.
  • FIGS. 5 and 6 show an end wall 10 made in accordance with the present invention.
  • the end wall 10 includes a first round key recess 18 and a second round key recess 20, which are equidistant from the neutral axis 12.
  • the end wall 10 includes a first oblong recess 14 and a second oblong recess 16, which are also equidistant from the neutral axis 12.
  • the end wall 10 includes a first set of thermocouple recesses 29 and 31 and a second set of thermocouple recesses 39 and 41, the sets being equidistant from the neutral axis 12.
  • a series of lateral strain relief notches 22 are disposed along the mounting face 23 of the end wall 10.
  • the seven connection holes 24 are also symmetrical about the neutral axis 12.
  • the end wall 10 of the present invention has an upper area, above the neutral axis 12, which is the mirror image of the lower area of the end wall below the neutral axis.
  • the symmetrical arrangement of the oblong key slots 14 and 16, the round key holes 18 and 20, and the thermocouple openings 29, 31, 39 and 41, is such that the end wall 10 can be mounted to the end wall carrier 7 in either of two vertical orientations. This flexibility of attachment allows the end wall 10 to be machined in such a way as to extend its service life.
  • the end wall 10 when the end wall 10 has been used to the point where it is in need of refurbishment, it can be removed from the carrier 7 and placed in a machine tool on an angle so that more material can be removed from one end (i.e., the worn end, typically the lower end) of the end wall 10 than from another, and the end wall 10 can be re-mounted in position on the end wall carrier 7 so that the end of the end wall 10, having more material remaining on the hot face 25 can be placed at the lower end of the end wall carrier 7. While the work face or hot face 25 of the end wall may not be perfectly parallel to the mounting face 23 of the end wall 10 after refurbishment (see Figure 7), such deviations from parallel can be accomodated by adjustment of the end wall carrier 7 by operation of the screw and nut arrangement 9.
  • the hot face 25 and the mounting face 23 will, by the same assymetric machining operation, be brought more closely into parallel relationship (see Figures 8 and 9). Openings 49 and 50 at the ends of the mounting frame 23 align with the fluid pathways 47 and 48 to allow cooling fluid to flow through the end wall 10.
  • the notches 22 in the mounting face 23 are preferably symmetrically disposed along the face 23 about the neutral axis 12.
  • thermocouple opening 39 overlaps with the oblong key slot 16 as shown in Figure 6.
  • the overlap results from the fact that the end wall 10 shown in Figures 5 and 6 is intended for a standard end wall carrier 7 shown in Figures 2, 3 and 4, an end wall carrier not initially designed to receive an end wall mounted in alternating vertical orientation after refurbishments.
  • end wall carriers of the type generally shown in those figures were to be designed to receive an end wall which was intended to be inverted after each refurbishment, it would be preferable to locate the various surface features so that there would be no overlapping, such as that which exists between the key slot 16 and the thermocouple passageway 39.
  • Figures 7 through 10 show how the service life of an end wall embodying the present invention can be substantially improved.
  • the method of the present invention entails the removal of less material from one end of an end wall than the other each time refurbishment of the end wall is performed. For example, as shown in Figure 6, after an end wall has been used to the point where it needs refurbishment, it can be removed and mounted in a support 54 where it may be machined on an angle 50. The upper or less worn end A of the end wall will have substantially less material removed than the lower end B of the end wall. Thus, in Figure 6, the material to be removed 52 from end B of the end wall 10 is greater than the amount of material removed from end A.
  • the end wall When the end wall, as oriented in Figure 8, is again in need of refurbishment, the end wall can be removed and again machined in an assymetric manner, i.e., at an angle 51 as shown in Figure 9.
  • the material to be removed in the second machining 54 is greater at end A of the end wall 10, as shown in Figure 9.
  • This procedure may be used as an alternative to machining the end wall 10 in such a manner whereby the work face 25 and the mounting face 23 are maintained in a parallel relationship, as has been the common practice.
  • the service life of an end wall may be greatly improved, perhaps as much as doubled. End walls are expensive components and substantially increasing the service life of such a component can result in substantial savings to the operator of a continuous caster.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Continuous Casting (AREA)
EP01306470A 2000-07-28 2001-07-27 Paroi pour lingotière de coulée continue Withdrawn EP1175947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US628257 1990-12-14
US62825700A 2000-07-28 2000-07-28

Publications (1)

Publication Number Publication Date
EP1175947A1 true EP1175947A1 (fr) 2002-01-30

Family

ID=24518136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01306470A Withdrawn EP1175947A1 (fr) 2000-07-28 2001-07-27 Paroi pour lingotière de coulée continue

Country Status (1)

Country Link
EP (1) EP1175947A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107891131A (zh) * 2017-12-15 2018-04-10 安徽马钢工程技术集团有限公司 一种圆坯连铸机结晶器对中装置及其对中方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3319332A1 (de) * 1982-06-18 1983-12-22 Clecim, 92400 Courbevoie Platte fuer eine stranggusskokille
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
EP0965401A1 (fr) * 1998-06-15 1999-12-22 Sms Schloemann-Siemag Aktiengesellschaft Paroi pour lingotière de coulée continue
EP1025929A1 (fr) * 1999-02-03 2000-08-09 SMS Demag AG Dispositif pour le raccordement d'une plaque de lingotière à une boíte à eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3319332A1 (de) * 1982-06-18 1983-12-22 Clecim, 92400 Courbevoie Platte fuer eine stranggusskokille
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
EP0965401A1 (fr) * 1998-06-15 1999-12-22 Sms Schloemann-Siemag Aktiengesellschaft Paroi pour lingotière de coulée continue
EP1025929A1 (fr) * 1999-02-03 2000-08-09 SMS Demag AG Dispositif pour le raccordement d'une plaque de lingotière à une boíte à eau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107891131A (zh) * 2017-12-15 2018-04-10 安徽马钢工程技术集团有限公司 一种圆坯连铸机结晶器对中装置及其对中方法
CN107891131B (zh) * 2017-12-15 2023-11-24 马钢集团设计研究院有限责任公司 一种圆坯连铸机结晶器对中装置及其对中方法

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