US3729048A - Continuous metal-casting plant - Google Patents

Continuous metal-casting plant Download PDF

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Publication number
US3729048A
US3729048A US00130413A US3729048DA US3729048A US 3729048 A US3729048 A US 3729048A US 00130413 A US00130413 A US 00130413A US 3729048D A US3729048D A US 3729048DA US 3729048 A US3729048 A US 3729048A
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US
United States
Prior art keywords
length
ingot
section
crystallizer
curvature
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Expired - Lifetime
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US00130413A
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English (en)
Inventor
E Gelfenbein
S Karlinsky
V Niskovskikh
G Khimich
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KHIM G
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KHIM G
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.)
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Publication date
Application filed by KHIM G filed Critical KHIM G
Application granted granted Critical
Publication of US3729048A publication Critical patent/US3729048A/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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • Said guiding devices form consecutively-arranged arc-shaped, curved and straight sections.
  • the arc-shaped section has a radius of curvature and its length, including the length of the crystallizer, varies from 0.2 to 0.4 of the overall length of the plant.
  • the length of the curved section depending on the central angle included between the horizontal and the straight line drawn through the center of the crystallizer curvature and the junction point between said arc-shaped and curved section is determined by the relation:
  • the guiding devices of the curved section are arranged along a curve whose radius of curvature varies with the changes in the length of this section of the thickness of the ingot liquid phase and which is expressed by a natural equation where 11 2 curve constant; 11, thickness of the ingot liquid phase, In; S, present length of the curve arc, m.
  • the present invention relates to continuous metalcasting plants and more specifically it relates to continuous metal-casting plants having a radial crystallizer.
  • the present invention is used most successfully for continuous casting of steel at a high speed.
  • the secondary cooling zone in the known plants is arranged without taking into account the deformation speed of the ingot and the thickness of its liquid phase with the result that these plants do not provide for the optimum conditions of ingot formation and thus fail to produce high-quality ingots at high casting speeds.
  • the main object of the invention is to provide a continuous metal-casting plant which produces high-quality ingots at a high casting speed by creating the optimum conditions of ingot formation and deformation.
  • a continuous metal-casting plant comprising a radial crystallizer and a secondary cooling zone with guiding devices for the ingot in which zone said ingot is gradually crystallized.
  • the guiding devices form an arc-shaped section with a radius which is equal to the radius of curvature of the crystallizer, a curved section with a radius of curvature varying throughout its length, and a straight section, all these sections being arranged in succession.
  • Length L, of the arc-shaped section, including the length of the crystallizer is equal to 0.2 0.4 of the overall length L of the plant, length L, of the curved section depends on the central angle [3,, occupied by the arc-shaped section and varies within the limits determined by the relation where B, central angle between the horizontal and the straight line drawn through the center of curvature of the crystallizer and the junction point between the arc-shaped and curved sections, rad. and R, radius of curvature of the crystallizer, m.
  • the guiding devices are located on this curved section along the curve whose radius of curvature R depends on the changes in the thickness h of the ingot liquid phase along the length of said section, and which is expressed by a natural equation h R (1 L2 rsI where curve constant; and
  • the crust of the ingot passing through the arc shaped section acquires a thickness which allows further deformation of the ingot to proceed without the formation of internal defects while the curve for the installation of the ingot guiding devices on the curved section ensures a lower speed of deformation of the ingot inner layers due to a uniform distribution of deformation of these layers throughout the length of the curved section.
  • the continuous metal-casting plant includes a radial crystallizer 1 with a certain radius of curvature R and a secondary cooling zone with guiding devices 2, e.g. rolls for the ingot 3.
  • the crystallizer is intended for the primary cooling of molten metal 4 and forming the crust 5 of the ingot 3.
  • the zone of secondary cooling serves for further gradual crystallization of the ingot, said zone consisting of the consecutively arranged areshaped section 6, curvedsection 7 and straight section 8.
  • the length L, of the arc-shaped section 6, including the length of the crystallizer, is selected so as to ensure crystallization of the ingot to 45 65 percent of its thickness at the end of this section. At such a thickness the crust 5 of the ingot 3 can withstand the simultaneous deformation under the effect of ferrostatic pressure and straightening of the ingot without the formation of internal defects.
  • V maximum casting speed m/min
  • This length of the arc-shaped section corresponds to the central angle [3,, included between the horizontal and the straight line connecting the center of curvature of the crystallizer with the end of the arc-shaped section.
  • the curved section 7 must ensure gradual and smooth straightening of the ingot 3 and a reduction in the deformation speed of the ingot internal layers 9, located near the boundary between its solid and liquid phases by uniform distribution of deformation of these layers along the entire length of the curved section.
  • the relative deformation E of the ingot layers located at a distance 11/2 from its axial line while said layers are unbent from the radius of curvature to the radius equal to infinity can be determined by the following expression:
  • the thickness h of the liquid phase of the ingot is a variable value throughout the length of the curved section.
  • the length L, of the curved section will be The plant operates as follows: the molten metal 5 is fed into the crystallizer l where the ingot 3 is formed and covered with crust 5. Then the ingot passes without deformation through the first arc-shaped section 6 in the secondary cooling zone. At the end of the section whose length is determined by the above relation, the crust 5 of the ingot grows to such a thickness which allows further deformation of the ingot without the appearance of internal defects. Then the ingot is transferred to the next curved section 7, where it is gradually straightened from the curvature obtained in the crystallizer to the straight line and where the thickness of its crust is further increased.
  • the deformation speed of the ingot internal layers 9 located close to the boundary between the liquid and solid phases of the ingot is brought to a minimum by forming this section in accordance with the relations quoted above. This ensures the production of highquality ingots without internal defects at high casting speeds.
  • a continuous ferrous-casting plant comprising: a radial crystallizer and a secondary cooling zone for formation of an ingot with guiding devices for said ingot, in which zone said ingot becomes gradually crystallized, said guiding devices forming three consecutivelyarranged sections comprising an arc-shaped section with a radius equal to the crystallizer radius R, of curvature and a length L including the crystallizer length, varying from 0.2 to 0.4 of the overall length L of the plant; a curved section whose length L depends on the central angle [3,, occupied by said arc-shaped section and is determined by the relation where [3,, central angle between a horizontal line drawn through the center of the crystallizer curvature and a straight line drawn through the junction point between said arc-shaped and curved sections, in radians, and R radius of crystallizer curvature, in meters, said guiding devices of said curved section being located along the curve whose radius R of curvature varies with the changes in the length of this section in the thickness h of the ingot

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US00130413A 1970-06-18 1971-04-01 Continuous metal-casting plant Expired - Lifetime US3729048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1438559A SU349238A1 (enrdf_load_stackoverflow) 1970-06-18 1970-06-18

Publications (1)

Publication Number Publication Date
US3729048A true US3729048A (en) 1973-04-24

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ID=20452975

Family Applications (1)

Application Number Title Priority Date Filing Date
US00130413A Expired - Lifetime US3729048A (en) 1970-06-18 1971-04-01 Continuous metal-casting plant

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Country Link
US (1) US3729048A (enrdf_load_stackoverflow)
DE (1) DE2117110A1 (enrdf_load_stackoverflow)
FR (1) FR2095323B1 (enrdf_load_stackoverflow)
GB (1) GB1332047A (enrdf_load_stackoverflow)
SU (1) SU349238A1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893503A (en) * 1973-07-24 1975-07-08 Voest Ag Continuous casting plant
JPS5257027A (en) * 1975-11-06 1977-05-11 Ishikawajima Harima Heavy Ind Method of continuous casting
US4433717A (en) 1980-04-02 1984-02-28 Nippon Steel Corporation Process for bow type continuous casting
US4465121A (en) * 1981-04-30 1984-08-14 Concast Service Union Ag Method and apparatus for bending a strand in a continuous casting installation for metals, especially steel
US6467533B1 (en) * 1999-10-28 2002-10-22 Sumitomo Metal Industries, Ltd. Machine and method for continuous casting of steel
CN111790893A (zh) * 2019-04-08 2020-10-20 上海梅山钢铁股份有限公司 一种控制连铸板坯结疤缺陷的工艺方法
EP2349612B2 (de) † 2008-11-20 2020-11-04 Primetals Technologies Austria GmbH Verfahren und stranggiessanlage zum herstellen von dicken brammen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007032985A1 (de) 2007-06-13 2008-12-18 Sms Demag Ag Verfahren und Vorrichtung zum Stranggießen eines Metallstranges
DE102008027496B4 (de) 2007-06-13 2023-05-25 Sms Group Gmbh Verfahren und Vorrichtung zum Stranggießen eines Metallstranges
DE102015202608A1 (de) * 2015-02-13 2016-08-18 Sms Group Gmbh Gießanlage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324931A (en) * 1963-05-03 1967-06-13 Mannesmann Ag Method of deflecting towards the horizontal a curved continuously cast descending billet
US3603377A (en) * 1965-08-09 1971-09-07 Georgy Lukich Khim Curvilinear mold and secondary cooling system for continuously cast metal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324931A (en) * 1963-05-03 1967-06-13 Mannesmann Ag Method of deflecting towards the horizontal a curved continuously cast descending billet
US3603377A (en) * 1965-08-09 1971-09-07 Georgy Lukich Khim Curvilinear mold and secondary cooling system for continuously cast metal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893503A (en) * 1973-07-24 1975-07-08 Voest Ag Continuous casting plant
JPS5257027A (en) * 1975-11-06 1977-05-11 Ishikawajima Harima Heavy Ind Method of continuous casting
US4433717A (en) 1980-04-02 1984-02-28 Nippon Steel Corporation Process for bow type continuous casting
US4465121A (en) * 1981-04-30 1984-08-14 Concast Service Union Ag Method and apparatus for bending a strand in a continuous casting installation for metals, especially steel
US6467533B1 (en) * 1999-10-28 2002-10-22 Sumitomo Metal Industries, Ltd. Machine and method for continuous casting of steel
EP2349612B2 (de) † 2008-11-20 2020-11-04 Primetals Technologies Austria GmbH Verfahren und stranggiessanlage zum herstellen von dicken brammen
CN111790893A (zh) * 2019-04-08 2020-10-20 上海梅山钢铁股份有限公司 一种控制连铸板坯结疤缺陷的工艺方法

Also Published As

Publication number Publication date
FR2095323A1 (enrdf_load_stackoverflow) 1972-02-11
GB1332047A (en) 1973-10-03
DE2117110A1 (de) 1971-12-23
SU349238A1 (enrdf_load_stackoverflow) 1974-05-05
FR2095323B1 (enrdf_load_stackoverflow) 1975-04-18

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