US3814408A - Cover for casting vessels in continuous casting machines - Google Patents

Cover for casting vessels in continuous casting machines Download PDF

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Publication number
US3814408A
US3814408A US00208717A US20871771A US3814408A US 3814408 A US3814408 A US 3814408A US 00208717 A US00208717 A US 00208717A US 20871771 A US20871771 A US 20871771A US 3814408 A US3814408 A US 3814408A
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US
United States
Prior art keywords
cover
base metal
casting
reinforcing members
steel
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
US00208717A
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English (en)
Inventor
F Cominotti
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 Concast AG
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Concast AG
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Filing date
Publication date
Application filed by Concast AG filed Critical Concast AG
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Publication of US3814408A publication Critical patent/US3814408A/en
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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
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like

Definitions

  • a cover for casting vessels such as tundishes used in connection with continuous casting machines comprises a body formed of a base metal such as cast iron which is provided with reinforcing members extending therethrough formed of a metal such as steel having a higher tensile strength than said base metal whereby the resistance of said cover to warping is improved.
  • the present invention relates to a cover made of a metal casting for casting vessels in continuous casting machines. Such casting vessels are principally used as tundishes, distributing launders, holding vessels or the like.
  • this is achieved by encasting in the metal of the cover reinforcing members consisting of a metal of superior tensile strength.
  • a cover of the proposed construction is capable of lasting for more than 1,000 castings, compared with conventional covers consisting exclusively of cast metal, which do not last for more than about 100 castings. This illustrates the great economic importance of the present invention. Besides these advantages, dangerous interruptions of the casting process which are caused by fragments of the cast cover falling into the metal pool no longer occur.
  • the base metal for forming the cover body may be cast iron, with steel being used for the reinforcing members.
  • cast iron is very brittle, whereas steel has a tensile strength and toughness greatly superior to cast iron. Cracks, which run" fairly easily in cast iron, are intercepted at the interface between the cast iron and the steel reinforcing members.
  • the differences in the expansion properties between cast iron and steel promote thermal stability, i.e., they assist in keeping the cover in shape.
  • the combination of cast iron and steel as materials for the cover respectively the cover reinforcing members therefore ensures prolonged durability, operating safety and a low tendency to distort.
  • the cross section of the reinforcement is arbitrary and may be say round or square. However, better results can be expected from sections that generate major moments of resistance to flexure, such as girder sections. Concrete reinforcing steel may also be used. For the production of the covers the reinforcing members are simply placed in the casting mold and encast in the metal that forms the cover.
  • the length and position of the embedded reinforcing members may be so chosen that the reinforcements project from the rim of the cover so that they can be used as brackets for transporting the covers, i.e., by a crane.
  • the reinforcing members may be provided with bores for the passage therethrough of a coolant to cool the cover.
  • the cover is exposed to fluctuating temperatures, since during the casting process it is exposed from below to the radiant heat of the liquid steel contained in the casting vessel, while it will cool off when the casting vessel has been emptied of the liquid steel. This results in a temperature profile in the cover which varies with reference to time. The different degrees of expansion at different temperatures cause arching of the cover and the enforced bending leads to the appearance of the usual neutral bending line.
  • another useful feature of the invention consists in locating most of the reinforcing members in the zone above or below this neutral bending line, i.e., offset therefrom, so that the longitudinal axis of the reinforcing member does not coincide with the neutral bending line or plane of the cover.
  • a particularly desirable effect is achieved if the coefficients of expansion of the base metal and of the reinforcing metal are different, so that strains will be generated by this difference which reduce the tendency to cracking and warping of the cover.
  • the location and number of the reinforcing members will principally depend upon the geometrical size and shape of the cover. For example, in a tundish an opening is provided for the supply from a ladle of the metal that is to be poured into the mold and possibly further openings are necessary for controlling the pouring rate of the liquid metal from the tundish into the molds with stopper rods. Since cracks often tend to connect with these openings, it is also preferred to provide reinforcing members around these openings.
  • FIG. 1 is a plan view of the cover of a tundish seen from above.
  • FIG. 2 is a plan view from above of a different embodiment of a tundish cover.
  • FIG. 3 is a vertical section of a casting vessel and cover and FIG. 4 is a section taken on the line IV IV in FIG. 3.
  • FIG. 1 shows a tundish cover 1 of a three-strand billet casting machine.
  • the cover I which consists of cast iron and is about 200 min thick, are reinforcing members 2. These members consist of steel and have a square cross section, each side of the square being 45 mm long.
  • An opening 3 in the cover serves for pouring 3 steel from a ladle into the tundish.
  • Openings 4 are provided for three stopperrods, not shown, which serve for controlling the flow of steel from the tundish into three molds.
  • the length of the parallel reinforcing members 2 is such that they project from the edges of the cover 1 and that the projecting ends can be used as carrying pins 5 for handling the cover.
  • FIG. 2 shows another tundish cover 6, likewise made of cast iron.
  • This cover contains reinforcing members 7 which are water-cooled tubes of steel. Cooling water can be circulated through the bores 8 in the members for cooling the cover. This cooling reduces the tendency of the cover to distort when it is exposed to the thermal radiation of the liquid metal which is contained in the casting vessel.
  • the ends of the tubes projecting from the edge of the cover 6 are provided with flanges for connecting them to a cooling water circuit, not shown in the drawing.
  • the liquid metal inlet opening 3 is also surrounded by such tubes which serve as reinforcing members.
  • FIGS. 3 and 4 illustrate a cover 9 which rests on a casting vessel 12 and contains reinforcing members 10.
  • the thermal radiation emitted from below the cover by the metal bath l3 thermally stresses the cover 9 and thereby induces it to warp.
  • distortion of the cover 9 is prevented by the particular position of the encast reinforcing member 10, since the larger part of the cross section of the member is contained in the strained zone which is located above the neutral bending line 11, i.e. the horizontal center line of member l0 is offset in upward direction from the neutral bending line 11.
  • Member 10 forms in this location, which is also colder, a particularly effective reinforcement.
  • a cover for use with casting vessels of continuous casting machines comprising a body of base metal, said base metal being cast iron, and reinforcing members encasted in said base metal and extending therethrough, said members being formed of steel having a tensile strength greater than that of said base metal, said reinforcing members projecting beyond said body and serving as carrying pins for handling the cover.
  • a cover for use with casting vessels of continuous casting machines comprising a body of base metal, said base metal being cast iron, and reinforcing members encasted in said base metal and extending therethrough, said members being formed of steel having a tensile strength greater than that of said base metal, said reinforcing members having passages extending therethrough for the circulation of coolant.
  • a cover for use with casting vessels of continuous casting machines comprising a body of base metal, said base metal being cast iron, and reinforcing members encasted in said base metal and extending therethrough, said members being formed of steel having a tensile strength greater than that of said base metal, said body being provided with an aperture extending therethrough and having a reinforcing member encircling said aperture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
US00208717A 1970-12-18 1971-12-16 Cover for casting vessels in continuous casting machines Expired - Lifetime US3814408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1878270A CH518761A (de) 1970-12-18 1970-12-18 Deckel für Giessgefässe auf Stranggiessanlagen

Publications (1)

Publication Number Publication Date
US3814408A true US3814408A (en) 1974-06-04

Family

ID=4435253

Family Applications (1)

Application Number Title Priority Date Filing Date
US00208717A Expired - Lifetime US3814408A (en) 1970-12-18 1971-12-16 Cover for casting vessels in continuous casting machines

Country Status (14)

Country Link
US (1) US3814408A (pt)
JP (1) JPS5124979B1 (pt)
AR (1) AR192230A1 (pt)
BE (1) BE776796A (pt)
BR (1) BR7108386D0 (pt)
CA (1) CA946118A (pt)
CH (1) CH518761A (pt)
DE (1) DE2162746A1 (pt)
ES (1) ES398561A1 (pt)
FR (1) FR2118185B1 (pt)
GB (1) GB1348790A (pt)
HU (1) HU166080B (pt)
IT (1) IT944095B (pt)
ZA (1) ZA718442B (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267366A1 (de) * 1986-10-14 1988-05-18 Didier-Werke Ag Feuerfeste Auskleidung, insbesondere für Deckel von Wärmverteilern
US6017486A (en) * 1997-12-12 2000-01-25 Uss/Kobe Steel Company Comprehensive fume collection system for production of leaded steel
US6083453A (en) * 1997-12-12 2000-07-04 Uss/Kobe Steel Company Tundish having fume collection provisions
CN104588630A (zh) * 2015-01-29 2015-05-06 江苏永钢集团有限公司 一种连铸中包
CN111250687A (zh) * 2020-03-26 2020-06-09 浙江欣辉耐火材料股份有限公司 一种连铸中间包包盖

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU276332A1 (ru) * Способ изготовления изложниц
US385424A (en) * 1888-07-03 Smeltsng-furnage
US1989096A (en) * 1933-10-02 1935-01-29 Illinois Clay Products Co Ingot mold
US2190392A (en) * 1938-06-16 1940-02-13 Belding Harvey Ross Ingot cap
US2821472A (en) * 1955-04-18 1958-01-28 Kaiser Aluminium Chem Corp Method for fluxing molten light metals prior to the continuous casting thereof
US3379427A (en) * 1965-02-03 1968-04-23 Kuznetsky Metall Kom Lining of the internal surface of a blast furnace
US3433288A (en) * 1964-10-21 1969-03-18 Benteler Geb Paderwerk Continuous casting apparatus with tiltable intermediate ladle
GB1172681A (en) * 1966-03-02 1969-12-03 Consolidus Ltd Improvements relating to Continuous Casting Moulds.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4729053U (pt) * 1971-04-19 1972-12-02

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU276332A1 (ru) * Способ изготовления изложниц
US385424A (en) * 1888-07-03 Smeltsng-furnage
US1989096A (en) * 1933-10-02 1935-01-29 Illinois Clay Products Co Ingot mold
US2190392A (en) * 1938-06-16 1940-02-13 Belding Harvey Ross Ingot cap
US2821472A (en) * 1955-04-18 1958-01-28 Kaiser Aluminium Chem Corp Method for fluxing molten light metals prior to the continuous casting thereof
US3433288A (en) * 1964-10-21 1969-03-18 Benteler Geb Paderwerk Continuous casting apparatus with tiltable intermediate ladle
US3379427A (en) * 1965-02-03 1968-04-23 Kuznetsky Metall Kom Lining of the internal surface of a blast furnace
GB1172681A (en) * 1966-03-02 1969-12-03 Consolidus Ltd Improvements relating to Continuous Casting Moulds.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Publication: The Iron Age; December 9, 1948, pages 93 96. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267366A1 (de) * 1986-10-14 1988-05-18 Didier-Werke Ag Feuerfeste Auskleidung, insbesondere für Deckel von Wärmverteilern
US6017486A (en) * 1997-12-12 2000-01-25 Uss/Kobe Steel Company Comprehensive fume collection system for production of leaded steel
US6083453A (en) * 1997-12-12 2000-07-04 Uss/Kobe Steel Company Tundish having fume collection provisions
CN104588630A (zh) * 2015-01-29 2015-05-06 江苏永钢集团有限公司 一种连铸中包
CN111250687A (zh) * 2020-03-26 2020-06-09 浙江欣辉耐火材料股份有限公司 一种连铸中间包包盖

Also Published As

Publication number Publication date
DE2162746A1 (de) 1972-07-06
FR2118185B1 (pt) 1974-06-21
IT944095B (it) 1973-04-20
AR192230A1 (es) 1973-02-08
BR7108386D0 (pt) 1973-05-24
CH518761A (de) 1972-02-15
BE776796A (fr) 1972-04-17
GB1348790A (en) 1974-03-20
FR2118185A1 (pt) 1972-07-28
CA946118A (en) 1974-04-30
HU166080B (pt) 1975-01-28
JPS5124979B1 (pt) 1976-07-28
ES398561A1 (es) 1974-09-16
ZA718442B (en) 1972-09-27

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