US3537507A - Continuous casting mold with perforated coolant distributor - Google Patents

Continuous casting mold with perforated coolant distributor Download PDF

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Publication number
US3537507A
US3537507A US689968A US3537507DA US3537507A US 3537507 A US3537507 A US 3537507A US 689968 A US689968 A US 689968A US 3537507D A US3537507D A US 3537507DA US 3537507 A US3537507 A US 3537507A
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United States
Prior art keywords
beams
mold
coolant
slab
distributor
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Expired - Lifetime
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US689968A
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English (en)
Inventor
Gunther De Rossi
Siegfried Gimmi
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Alcan Holdings Switzerland AG
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Alusuisse Holdings AG
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Publication date
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
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    • 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
    • B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting

Definitions

  • Marmorek ABSTRACT A mold for the continuous or semicontinuous casting of slabs has intercommunicating two hollow long side 10 cla'ms4nrawmg Flgs' beams and two shorter hollow end beams, and a distributor US. Cl 164/283, pipe in one or more of the beams with outlet holes that are 164/89 grouped nearer to the center than to the ends of the beam or Int. Cl 822d 11/00 beams, so that coolant in greater volume will flow from the Field ofSearch 164/82, 89, center portion of the beam out of the beam interior onto the 273, 283, slab than from the end portions ofthe beam.
  • the present invention relates to continuous or semicontinuous casting, and more particularly relates to molds of the kind used for the casting of ingot'slabs of rectangular cross section, particularly rolling mill slabs.
  • Molds of this kind need to be cooled.
  • Some molds have walls formed with passages through which a coolant flows, entering through inlet pipe'connections and issuing through outlets which may be spray nozzles or slots through which the coolant is sprayed against the surface of the emerging cast slab.
  • Other molds again have solid walls which are comparatively thin and are cooled by a spray of coolant which imp inges on the outer surface of the wall from spray nozzles arranged in a surrounding system of tubes.
  • spray nozzles can be grouped more closely together near the middle of the wider side of the emerging slab and/or they can have larger diameters. This solution, however, has various disadvantages and encounters certain difficulties in practice.
  • a film of water is formed on the surface of the slab, the upper edge of the film forming a curve which is parabolic or hyperbolic, depending on the angle of the jet relative to the slab surface.
  • the curved upper edges of the water films intersect and in order to obtain even cooling over the whole width of the slab the points of intersections of the said curves should all be substantially at the same level on the slab surface. If an intersection between the curves of the films formed by two adjacent jets is lower on the slab surface than the other intersections, the emerging slab will receive less intensive cooling at this point.
  • the spray nozzles needed to be made very accurately, both in regard to the distance for which they are spaced apart, and in regard to direction.
  • the necessary changes in nozzle spacing or diameter makes it difficult to obtain this accuracy, if only because it is necessary to change drills, unless comparatively expensive machine tools are used.
  • hollow side beam or side member which encloses a distributor pipe that extends along the interior of the side beam with a number of outlet holes grouped nearer to the center than to the ends of the side beam.
  • a coolant is supplied to the distributor pipe and by this pipe is led into the interior of the side beam; and the side beam is provided uniformly along its length with at least one opening through which in use coolant can pass from the interior of the beam emerging from the mold in use on to a side of the slab, so that a greater volume flow of coolant is directed on to a center portion of the side of the slab than to portions ofthe side of the slab near its edges.
  • the side beam can be provided with either a continuous slot or a row of nozzles for directing the coolant from its hollow center onto the slab.
  • the distributor pipe can if desired extend over only a part of the length of the mold, in which case it is fed with coolant through pipe connections which penetrate through a wall of the hollow side beam.
  • the distributor pipe together with the pipe connections then forms a T-shaped or L-shaped structure. After this structure has been inserted into the side beam, the openings in the side beam will be sealed, for example by covers secured to the pipe connections.
  • the distributor pipe projects through at least one oftwo end beams of the mold, and the projecting end serves as the inlet connection for the feed ofthc coolant.
  • the hydraulic pressure head driving the coolant out through the regularly spaced spray nozzles, or out thiough the slot of constant width is greater towards the middie of the side beam, and consequently the spray of coolant issues in larger volume than near the edges of the side beam.
  • the distributor pipe preferably extends at both ends through the end beams of the mold.
  • the coolant can then be fed into the distributor pipe through both ends.
  • a further advantage of the arrangement in which both ends of the distributor pipe projects outwards through the end members of the mold frame is that the mold, assuming it to consist of two side beams and two end beams, can be assembled by using the two distributor pipes as tie rods, the ends of the side beams forming butt joints with surfaces provided for the purpose at the ends ofthe end beams.
  • the side beams can be manufactured in the form of long, hollow beams and be sawn off to length as required.
  • the evenly spaced spray nozzles, or spray slots of constant width, can be machined in the side beams with sufficient accuracy, using a special machine, either before the side beam is cut to length or afterwards.
  • the end beam can for example be molded. In this way molds of different dimensions can easily be assembled from side and end beams of different lengths.
  • the length of each distributor pipe must of course suit the length of the corresponding side beam.
  • the distributor pipes are easy to manufacture because the outlet holes need not be drilled very accurately, either in diameter or in direction; the hydraulic pressure in the interior of the side beam distributes itself in any case fairly evenly between adjoining outlet holes.
  • These outlet holes can be drilled in the distributor pipe by using an ordinary manual drill, if necessary with the help ofa ruler.
  • FIG. 1 is a fragmentary plan view, partly in section, of a mold in accordance with an embodiment of the invention
  • FIG. 2 is a sectional view taken on the line A-A of FIG. 1;
  • FIG. 3 is a sectional view taken on the line B-B of FIG. 1;
  • FIG. 4 is a fragmentary end elevational view of an end beam.
  • FIG. 1 there are provided two hollow side members or side beams l, and two end members or end beams 2 which are connected to the side beams l by means of two distributor pipes 3.
  • the distributor pipes 3 act as tie rods, giving a positive mechanical connection between the beams.
  • the side beams l are of rectangular cross section as is usual.
  • Each side beam 1 has a row of spray nozzles 4 drilled at equal spacing through the lower, inner edge of the wall, and all the nozzles 4 have the same diameter.
  • Each spray nozzle 4 is drilled through the wall of the side beam 1 at an angle of about 30 relative to the inner surface of the beam.
  • the bore hole diameter of each nozzle 4 is constant at 2.5mm. and the nozzles 4 are spaced apart at a constant spacing of about 5mm. between the centers of the bore holes.
  • the spray nozzles are drilled through the wall of a side beam 1 of which the corner has already been sawn off, however, and if it is desired to produce reduced cooling near the corners of the cast slab, then if desired the first spray nozzle 4 near the corner of the slab can be spaced for a greater distance from the corner, for example for a distance of mm.
  • Each end beam 2 preferably comprises a trough-shaped casting 5 which has connecting webs 6 for connecting the end beams 2 to the two side beams l of the casting .mold.
  • Each connecting web 6 has two contact surfaces 7 which rest against the end surfaces of the side members 1 so that a butt joint is formed.
  • Each trough-shaped end beam 2 is closed by a cover plate 9, that is held be means of screws 8, so that the interior of the end beam 2 forms an internal chamber to contain the cooling medium.
  • Each end beam 2 also has spray nozzles 4. These spray nozzles may have the same diameter as for the side beams l but can, if desired, have instead different diameters from those of the side beams 1.
  • each side beam I there is disposed a distributor pipe 3 which, as previously indicated, not only distributes the cooling medium but also acts as a tie rod.
  • the two ends of the distributor pipe 3 are externally threaded and project through the connecting webs 6.
  • Nuts 10 are mounted over the projecting ends of the distributor pipe 3 and hold the entire assembly together; A watertight sealant can be applied between the contact surfaces 7.
  • Each distributor pipe 3 has a series of holes 11 in its middle region. These holes 11 can be arranged in one row or in several rows, and they are preferably so positioned circumferentially that the jets of coolant issuing from them do not impinge at right angles against the inner wall of the side beam 1, as this would cause excessive local cooling.
  • the holes I] in the distributor pipe 3 have relatively large diameters, for example more than 5mm. and preferably between 8 and 10mm., to prevent the production of any rapid jet of water from the hole and any attendant shower spray.
  • the part of the distributor pipe 3 which is drilled in this way must be shorter than the length of the side beam 1, that is to say, shorter than the length of the mold.
  • the length of the section of the distributor pipes 3 in which the holes 11 are concentrated is preferably between 20 percent and percent of the inner length of the side beam 1, and for most applications the length of the middle portion will be between 35 percent and 60 percent of the inner length of the side beam 1.
  • the distributor pipe 3 has holes 11 along about 50 percent of the inner length of the mold.
  • the difference in hydraulic driving pressure along the length of the side beam 1 is of course greater if the drilled section of the distributor pipe 3 is shorter.
  • the difference between the velocities of the water jets issuing from the spray nozzles 4 can be detected quite easily by passing a hand along the inner edge of the side beam 1.
  • the cooling medium is fed up to the distributor pipe 3 through branched connections (not shown) attached to thetwo ends ofthe pipe 3.
  • the coolant For feeding the coolant to the end beams 2, there can be provided special connections.
  • the narrow sides of the cast slab do not need to be cooled as much as the wide sides, and it has been found that the end beams 2 of the mold receive a sufficient flow of coolant if the connecting webs 6 are formed with passages 12.
  • the coolant flows from the hollow interior of the side beams 1 through the passages 12 into the internal chambers ofthe end beam 2.
  • the passages 12 can either be drilled or be formed during the casting of the end beams; in the latter case, the passage 12 can be made large enough to supply enough coolant to the end beam 2 even if there is only one passage between the side beam 1 and the end beam 2.
  • a screw 13 can be provided in one or in each passage 12, the end of which projects adjustably into the passage 12.
  • a mold for the continuous or semicontinuous casting of ingot slabs of substantially rectangular cross section comprising:
  • At least one distributor pipe longitudinally disposed in the interior of said side beams and having a series of outlet holes grouped nearer to the center than to the ends of said side beams for admitting coolant supplied to the distributor pipe into the interior of said side beams;
  • each of said side beams defining uniformly 'along its length near the mold bottom at least one opening through which coolant can pass from the interior of the beam on to a side of the cast slab emerging from the mold, for directing a greater volume flow of coolant on to a center portion of the side of the slab than to portions of the side of the slab near its edge.
  • a mold according to claim I in which the outlet holes in the distributor pipe are grouped in the center section forming from about 20 percent to 80 percent of the inner length of the beam.
  • a mold according to claim 2 in which the holes in the distributor pipe are grouped in the center section forming from about 35 to 60 percent of the inner length of the beam.
  • a mold according to claim 1 in which the distributor pipe is disposed in a side beam and projects beyond at least one of said two end beams, the projecting end serving as a connection for supplying the coolant.
  • a mold according to claim 1 in which a distributor pipe is disposed in each side beam, the distributor pipes projecting at either end beyond both end beams and the projecting ends of the distributor pipes serving to attach the end beams to the side beams, by a butt joint, whereby the distributor pipes function as tie rods.
  • a mold according to claim 8 in which at least some of said passages between the side and end beams are equipped with an adjustment means for adjusting the flow of cooling medium therethrough.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Nozzles (AREA)
US689968A 1966-12-16 1967-12-12 Continuous casting mold with perforated coolant distributor Expired - Lifetime US3537507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1811266A CH452121A (de) 1966-12-16 1966-12-16 Stranggiesskokille für Barren rechteckigen Querschnitts

Publications (1)

Publication Number Publication Date
US3537507A true US3537507A (en) 1970-11-03

Family

ID=4430523

Family Applications (1)

Application Number Title Priority Date Filing Date
US689968A Expired - Lifetime US3537507A (en) 1966-12-16 1967-12-12 Continuous casting mold with perforated coolant distributor

Country Status (12)

Country Link
US (1) US3537507A (is)
AT (1) AT278267B (is)
BE (1) BE707641A (is)
CH (1) CH452121A (is)
DE (1) DE1583699C3 (is)
DK (1) DK113029B (is)
FR (1) FR1548834A (is)
GB (1) GB1150109A (is)
IS (1) IS738B6 (is)
NL (1) NL159306B (is)
NO (1) NO118620B (is)
SE (1) SE327510B (is)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682235A (en) * 1969-09-26 1972-08-08 Kazeef Michel G Cooling water chamber for vertical casting frame
CN102151806A (zh) * 2011-03-24 2011-08-17 中冶京诚工程技术有限公司 用于锭坯组合式水冷铸造装置的钢结构水梁框架
WO2018229634A1 (en) * 2017-06-12 2018-12-20 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11331715B2 (en) 2017-06-12 2022-05-17 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11717882B1 (en) 2022-02-18 2023-08-08 Wagstaff, Inc. Mold casting surface cooling
US11883876B2 (en) 2017-06-12 2024-01-30 Wagstaff, Inc. Dynamic mold shape control for direct chill casting

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682235A (en) * 1969-09-26 1972-08-08 Kazeef Michel G Cooling water chamber for vertical casting frame
CN102151806A (zh) * 2011-03-24 2011-08-17 中冶京诚工程技术有限公司 用于锭坯组合式水冷铸造装置的钢结构水梁框架
CN102151806B (zh) * 2011-03-24 2012-07-04 中冶京诚工程技术有限公司 用于锭坯组合式水冷铸造装置的钢结构水梁框架
RU2736619C1 (ru) * 2017-06-12 2020-11-19 Уэгстафф, Инк. Динамическое управление геометрической формой кристаллизатора для литья с прямым охлаждением
US10350674B2 (en) 2017-06-12 2019-07-16 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
CN110799284A (zh) * 2017-06-12 2020-02-14 瓦格斯塔夫公司 针对直接冷铸的动态模具形状控制
WO2018229634A1 (en) * 2017-06-12 2018-12-20 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11065678B2 (en) 2017-06-12 2021-07-20 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11331715B2 (en) 2017-06-12 2022-05-17 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
CN110799284B (zh) * 2017-06-12 2022-05-27 瓦格斯塔夫公司 直接冷却铸造结晶器的动态形状控制
US11548061B2 (en) 2017-06-12 2023-01-10 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11883876B2 (en) 2017-06-12 2024-01-30 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11717882B1 (en) 2022-02-18 2023-08-08 Wagstaff, Inc. Mold casting surface cooling

Also Published As

Publication number Publication date
CH452121A (de) 1968-05-31
DE1583699C3 (de) 1979-02-01
BE707641A (is) 1968-04-16
FR1548834A (is) 1968-12-06
DE1583699B2 (de) 1978-06-01
AT278267B (de) 1970-01-26
NL159306B (nl) 1979-02-15
DK113029B (da) 1969-02-10
SE327510B (is) 1970-08-24
NL6715854A (is) 1968-06-17
NO118620B (is) 1970-01-19
IS738B6 (is) 1970-11-18
DE1583699A1 (de) 1970-10-15
IS1702A7 (is) 1968-06-17
GB1150109A (en) 1969-04-30

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