US3860059A - Method and apparatus for casting ingots - Google Patents

Method and apparatus for casting ingots Download PDF

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Publication number
US3860059A
US3860059A US344597A US34459773A US3860059A US 3860059 A US3860059 A US 3860059A US 344597 A US344597 A US 344597A US 34459773 A US34459773 A US 34459773A US 3860059 A US3860059 A US 3860059A
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US
United States
Prior art keywords
mould
lining
corner
gaps
ingot
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.)
Expired - Lifetime
Application number
US344597A
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English (en)
Inventor
Ralf Ageborg
Jan Olof Beckman
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.)
Foseco International Ltd
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Foseco International Ltd
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Filing date
Publication date
Application filed by Foseco International Ltd filed Critical Foseco International Ltd
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Publication of US3860059A publication Critical patent/US3860059A/en
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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
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B22D7/10—Hot tops therefor
    • B22D7/106—Configuration of hot tops

Definitions

  • the present invention relates to casting molten metal, particularly steel, to form ingots.
  • metals particularly steel
  • moulds it is of great importance to be able to use the mould again as soon as possible after the casting is finished. It is thus desirable substantially to shorten the period of time the casting is in the mould. It is also desirable to reduce the period of time the casting is in the cooling bed.
  • Ingot moulds for steel casting are normally provided with a hot top disposed at the upper end of the mould or in a head box on the mould.
  • the hot top is usually assembled from refractory heat-insulating components, for example, four plates for side surfaces and four wedges for the corners.
  • the hot top may also be assembled from four plates and two wedges, or from four plates only.
  • the hot top remains in the mould until the steel has solidified, and the casting cannot be removed from the mould before this time since otherwise the hot top would then fall apart. This is due to its heat-insulating properties; the hot top keeps the metal in the hot top molten for sufficiently long that molten metal can refill the interior of the ingot as the steel, on solidifying, contracts.
  • an ingot mould having a hot top formed of a lining of heat-insulating refractory material, and a plurality of metal plates located between the walls of the ingot mould and the lining, there being gaps between the mould wall and the lining at each corner, into which gaps the end of the metal plates extend, and into which, during casting, molten metal may flow.
  • steel plates are provided between the mould and the hot top, these steel plates extending over a substantial part of the height of the hot top and horizontally into the cavities provided in the corners of the mould.
  • the plates may be solid or perforated or may be in the form of a mesh, e.g., a welded or expanded mesh.
  • the molten steel penetrates these cavities during casting and, in contact with the mould wall, the steel solidifies (in the corner portions) fairly rapidly and is joined to the ends of the steel plates.
  • the hot top is then surrounded by a rigid steel frame formed shortly after pouring the casting has ended. This frame holds the components of the hot top together and, as soon as the outer layer of the casting has solidified and becomes self-supporting, the casting may be removed from the mould with the steel still molten in the hot top.
  • a heat-conductive material can be provided on the top of the molten steel in the hot top so that here also a steel shell is quickly formed.
  • a steel casting is obtained which is still molten inside, but which is entirely surrounded by solidified material and which has a heat-insulating hot top even after the casting has been taken out of the mould.
  • the casting can then be placed in a cooling bed for controlling the solidifying process.
  • the invention thus generally relates to a method of casting in a mould which, at its upper portion, is provided with a hot top of refractory material, and it is characterised in that, between the mould and the hot top on the sides thereof, metal plates are provided which terminate in spaced relationship from one another in the corner regions, and in that the molten metal cast in the mould is brought to flow into the corner regions of the mould to the height of the hot top in order to connect the opposing ends of the metal plates together on solidification.
  • the casting may be removed from the mould after solidification of the outer layers while the casting is still molten internally, and placed in the cooling bed.
  • the hot top In order to allow the steel to flow into the corner regions between the hot top and the mould, the hot top, at the corners thereof, may have a greater radius of curvature than the corner of the mould.
  • the hot top may have, at the corners thereof, aperatures through which molten metal can flow.
  • the head box may be stepped on the sides facing toward the mould to support the steel plates.
  • FIG. 1 is a vertical section through a mould with a hot top viewed from the side, and
  • FIG. 2 is a detail of the mould viewed from above and on a larger scale.
  • part of a mould l is shown in section.
  • a hot top is formed by four plates 2 of refractory heat-insulating material, known per se, and four wedges 3 in the corners.
  • the plates 2 have, at the top thereof, a projecting edge 4, so that they may be hung on the mould 1.
  • a steel plate 5 is disposed between the mould l and each of the plates 2, the steel plate 5 resting upon a step 6 at the lower edge of the plate 2.
  • An aperture 7 is provided in each of the wedges 3.
  • FIG. 2 A corner of a mould with a hot top in accordance with the invention is shown on a larger scale in FIG. 2. It may be seen here that the steel plates 5 project somewhat past the plates 2 and, due to the fact that the radius of curvature of the wedge 3 (indicated by the arrow 8) is greater than the radius of curvature of the corner of the mould 1 (indicated by arrow 9), there is a cavity 10 between the mould l and the wedge 3. During casting, molten steel flows up into the cavity 10 and fills this, filling being facilitated by means of the aperture 7 in wedge 3.
  • the molten steel in the cavity 10 will substantially weld itself to the edges 11 of the steel plates 5 when it solidifies, and the solidification in the cavity 10 takes place much more rapidly than the solidification of the steel in the hot top.
  • the casting may be removed from the mould while the steel is still molten in the hot top since the hot top is now surrounded by a solid steel frame comprising the four steel plates 5 and the solidified steel in the cavities 10 between the mould l and the wedges 3 in the corners.
  • An ingot mould having a hot top formed of a lining of heat-insulating refractory material, and a plurality of metal plates located between each of the side walls of the ingot mould and the lining, said lining being horizontally spaced from the corner walls to provide vertical gaps between the mould wall and the lining at each corner, adjacent ends of said metal plates extending into said corner gaps whereby during casting, molten metal may flow up into said gaps and substantially weld itself to said adjacent ends of said plates.
  • An ingot mould according to claim 1 wherein the lining consists of four slabs and four corner wedges.
  • the improvement which comprises: pouring molten metal into an ingot mould having a hot top formed of a lining of heat-insulating refractory material, and a plurality of metal plates located between each of the side walls of the ingot mould and the lining, there being gaps between the mould wall and the lining at each corner, into which gaps the end of the metal plates extend, and into which, during casting, molten metal may flow; allowing the molten metal to penetrate into the gaps and there solidify and weld the plates together; and removing the part-solidified ingot from the mould while the metal in the hot top is still molten.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Dental Prosthetics (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
US344597A 1972-03-27 1973-03-26 Method and apparatus for casting ingots Expired - Lifetime US3860059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO1042/72A NO138474C (no) 1972-03-27 1972-03-27 Fremgangsmaate til stoepning av metall i en kokille som ved sin oevre ende er utstyrt med en synkeboks og anordning til fremgangsmaatens utfoerelse

Publications (1)

Publication Number Publication Date
US3860059A true US3860059A (en) 1975-01-14

Family

ID=19877942

Family Applications (1)

Application Number Title Priority Date Filing Date
US344597A Expired - Lifetime US3860059A (en) 1972-03-27 1973-03-26 Method and apparatus for casting ingots

Country Status (9)

Country Link
US (1) US3860059A (no)
JP (1) JPS5137046B2 (no)
BR (1) BR7302183D0 (no)
CA (1) CA992288A (no)
DE (1) DE2314787A1 (no)
FR (1) FR2178041B1 (no)
GB (1) GB1409329A (no)
NO (1) NO138474C (no)
SE (1) SE389626B (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550788A (zh) * 2014-12-27 2015-04-29 江苏苏南重工机械科技有限公司 一种钢锭拉断工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561722A (en) * 1966-12-20 1971-02-09 Mannesmann Ag Steel casting mold insert
US3752435A (en) * 1969-06-02 1973-08-14 H Daussan Ingot-molds comprising ingot insulating means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1479364A (fr) * 1966-03-17 1967-05-05 Fonderite Rehausse pour lingotières renversées
FR2055948A5 (no) * 1969-08-08 1971-05-14 Daussan Henri

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561722A (en) * 1966-12-20 1971-02-09 Mannesmann Ag Steel casting mold insert
US3752435A (en) * 1969-06-02 1973-08-14 H Daussan Ingot-molds comprising ingot insulating means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550788A (zh) * 2014-12-27 2015-04-29 江苏苏南重工机械科技有限公司 一种钢锭拉断工艺

Also Published As

Publication number Publication date
FR2178041A1 (no) 1973-11-09
CA992288A (en) 1976-07-06
FR2178041B1 (no) 1975-04-04
SE389626B (sv) 1976-11-15
JPS5137046B2 (no) 1976-10-13
JPS498415A (no) 1974-01-25
NO138474B (no) 1978-06-05
NO138474C (no) 1978-09-13
BR7302183D0 (pt) 1974-06-27
DE2314787A1 (de) 1973-10-04
GB1409329A (en) 1975-10-08

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