CN1872453A - Horizontal conticaster and technique of billet withdrawal - Google Patents
Horizontal conticaster and technique of billet withdrawal Download PDFInfo
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- CN1872453A CN1872453A CN 200510034887 CN200510034887A CN1872453A CN 1872453 A CN1872453 A CN 1872453A CN 200510034887 CN200510034887 CN 200510034887 CN 200510034887 A CN200510034887 A CN 200510034887A CN 1872453 A CN1872453 A CN 1872453A
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- crystallizer
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- copper coin
- straightway
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Abstract
A horizontal conticasting machine has a tundish, a crystallizer and a horizontal billet-pulling unit for horizontally pulling the steel billet out of said crystallizer. Said crystallizer has a movable casting cavity formed by at least 4 copper plates and consisting of an arc segment and a straight segment, and the vertical and horizontal drivers for generating horizontal and vertical vibrations.
Description
Technical field
The present invention relates to a kind of metal level conticaster and billet withdrawing technology thereof.
Background technology
Horizontal casting is one of main mode of production of modern metallurgical (iron and steel) production, and horizontal caster is a special equipment of realizing this mode of production, because equipment investment is few, easy to maintenance, uses in many metallurgical works.
Crystallizer and tundish that the existing level conticaster is adopted connect together, fix simultaneously, in casting process, clip steel billet by the throwing roller, by draw, stop, the anti-motion that pushes away, stops, draws, steel billet is come out from crystallizer lira, prevent that simultaneously steel billet and copper plate of crystallizer from cohering, to prevent bleedout, the geometry of crystallizer is constant, generally is whole.
There are following problem in existing horizontal caster and billet withdrawing technology thereof:
1. be parallel to vibration back and forth on the direction of motion of strand owing to haul the steel billet crystallizer by the throwing system, and the throwing mass of system is bigger, inertia is big, so vibration frequency is less, causes that casting speed is low, yields poorly;
2. prevent the steel billet bleedout in order to reduce resistance of billet withdrawal, the back draught of crystallizer can not be too big; Along with the cooling of strand is shunk, make the inwall of strand and crystallizer form air gap; Air gap is a maximum thermal resistance during molten steel solidification become strand time heat is transmitted, and bigger air gap then has bigger thermal resistance, and big thermal resistance causes the potential capacity of heat transmission of crystallizer not bring into play;
3. to come the manufacture of intraocular liquid level with shading ring, shading ring cost height, operating cost height;
4. shell and copper plate of crystallizer is lubricated very difficult;
5. cast steel grade and kind are few, are used to pour into a mould rolling nothing at present mostly and meet steel pipe circle base.
Summary of the invention
The objective of the invention is to propose a kind of new construction of horizontal caster and new billet withdrawing technology, nationality is to solve the existing the problems referred to above of existing level conticaster.
The horizontal caster that the present invention is designed comprises tundish, crystallizer and horizontal drawing device, and the drawing device band steel billet, and steel billet is pulled out to horizontal direction in crystallizer.Described crystallizer is a fourplatemold, surround movable casting chamber by the copper coin combination that is no less than four, the camber section that casting chamber head makes progress for the molten steel inlet, the camber section is following to be horizontal segment, it is straightway that horizontal segment accounts for the back segment casting chamber crystallizer of cross-directional length more than 3/4; Tundish is positioned at the top of crystallizer casting chamber head, with the crystallizer composition from state, the mouth of a river of tundish is facing to the molten steel inlet of crystallizer casting chamber head; The straightway of crystallizer be provided with the copper coin that makes the crystallizer straightway produce along perpendicular to the direction vibration of strand vertically to drive unit, and have one and act on level that whole crystallizer makes it to vibrate back and forth in the horizontal direction to drive unit.
Be that 100～500 millimeters segmental arcs are connected smoothly by radius of curvature between camber section of this horizontal caster and the horizontal segment, the horizontal segment cross-directional length of crystallizer is 1000～1800mm, and the vertical height of crystallizer can be 1.2～2 times of strand depth of sections.
The fourplatemold of this horizontal caster respectively makes up between the copper coin can have small interval, and to form movable casting chamber, described interval should be not more than 0.2mm.The described structure that forms cavity in the copper coin body that respectively makes up, cavity has cooling fluid input, delivery outlet, and in order to import cooling fluid to cavity, copper plate thickness can be 10mm～30mm.
Horizontal caster of the present invention can adopt following specific design scheme:
Described fourplatemold is fixed in the framework, saidly vertically is installed between the copper coin and said framework of crystallizer straightway to drive unit, said level is installed in said framework and supports between the frame of this framework to drive unit.
Describedly vertically can be provided with three, be installed in respectively between the end face copper coin and and arranged on left and right sides copper coin and said framework of crystallizer straightway to drive unit.
The cross sectional shape of described fourplatemold can be square, rectangle, I-shaped or circular.
Combination mould of the present invention can be that four copper coins are formed, and also can be that six copper coins are formed, and can design as required, generally do not surpass six, otherwise manufacturing cost increases.
Billet withdrawing technology of the present invention adopts the designed horizontal caster of the present invention, it is characterized in that in process of billet withdrawal, is driven to drive unit by said level and makes the vibration back and forth in the horizontal direction of whole crystallizer, and amplitude is 2～6mm; Vertically make the vibration of the copper coin generation of crystallizer straightway perpendicular to strand to the drive unit driving by said, amplitude is 0.05～0.2mm; Said level is in the following manner vibrated cooperation with vertical to drive unit to drive unit: when level when drive unit makes the direction of vibration of crystallizer identical with the throwing direction, vertically press to strand to the copper coin of drive unit driving crystallizer straightway, when level when drive unit makes the direction of vibration of crystallizer opposite with the throwing direction, vertically the copper coin that drives the crystallizer straightway to drive unit leaves strand.
Technical scheme of the present invention is to do to propose on the basis of deep study and analysis in the principle of solidifying that the liquid towards metal is finished in crystallizer in the process of billet withdrawal, the inventor thinks: the output of the continuous casting of improving the standard, need to improve the strand pulling rate, improve pulling rate, mold oscillation will take to adopt the little amplitude mode of high frequency, high frequency slightly to vibrate, crystallizer will break away from tundish, crystallizer and tundish break away from, and just can remove shading ring, and just adopting preferably, lubricating system lubricates crystallizer; But crystallizer and tundish break away from, and crystallizer just has the small curve camber section of beginning, has the crystallizer of small curve camber section can produce base shell shake line, causes product quality problem, meeting bleedout when serious; For solving this contradiction, propose to adopt special mold structure and billet withdrawing technology thereof, be provided with act on level that whole crystallizer makes it to vibrate back and forth in the horizontal direction to drive unit and make the copper coin of crystallizer straightway produce along perpendicular to the direction vibration of strand vertically to drive unit; When carrying out throwing production, make crystallizer force the direction of motion (horizontal direction) to vibrate back and forth to drive unit, realize horizontal casting along strand by level; Crystallizer can adopt big back draught, by vertical driving to drive unit, copper plate of crystallizer has the function that produces under external force base shell micro-displacement, when strand along copper coin when the strand direction is slided, make copper coin produce a small displacement of leaving the base shell, thereby resistance of billet withdrawal is reduced, to reach the purpose that prevents bleedout; When strand along copper coin when mouth of a river direction is slided, make copper coin produce a small displacement that presses to the base shell, reduce air gap, reduce thermal resistance thereby make, to improve heat transfer efficiency, increase the active force of copper coin simultaneously, impel crystallizer bending section base, prevent bleedout because the too small base shell shake line that causes of curvature is eliminated to the base shell.Along with the raising of the capacity of heat transmission of crystallizer, crystallizer can adopt big back draught, to improve the pulling rate of steel billet, improves the output of casting machine, and helps base shell elimination of Crack, guarantees slab quality.
Description of drawings
Fig. 1 is the structural representation of horizontal caster embodiment of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to view.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are described in further detail:
Fig. 1 and Fig. 2 have shown the structure of horizontal caster embodiment of the present invention, are used in billet continuous casting.Its crystallizer constitutes fourplatemolds by the end (outer arc) copper coin 1, last (inner arc) copper coin 2, left side copper coin 3 and right side copper coin 4, forms movable casting chamber; This combination mould is fixed in the framework 5, and framework 5 is supported on the plane bearing 7 of frame 6; The head of fourplatemold is a segmental arc, and the camber section is following be horizontal segment, and the cross-directional length of horizontal segment is 1200mm, horizontal segment account for cross-directional length more than 3/4 the back segment of (about 1000mm) to cast the chamber crystallizer be straightway; Tundish 13 is positioned at the top of crystallizer casting chamber head, with the crystallizer composition from state, the mouth of a river 14 of tundish 13 is facing to the molten steel inlet of crystallizer casting chamber head; The following copper coin 1 of fourplatemold straightway, on be provided with respectively between copper coin 2, left side copper coin 3, right side copper coin 4 and the framework 5 vertical to drive unit (employing servo hydraulic cylinder) 8,9,10,11; The level that is provided with between the back of framework 5 and the frame 6 is to drive unit (employing servo hydraulic cylinder) 12; The drawing device of this horizontal caster adopts throwing roller 15, and among Fig. 1,16 is not solidified molten steel in the combination mould, and 17 is the strand that has solidified.
Adopt this horizontal caster to carry out in the horizontal throwing production process, molten steel is injected the molten steel inlet of combination mould by the mouth of a river 14 of tundish 13, level drives vibration back and forth on the direction of motion of crystallizer at strand to drive unit 12, amplitude is 2～6mm, saidly vertically drive the copper coin that makes the crystallizer straightway to drive unit and produce vibration perpendicular to strand, amplitude is 0.05～0.2mm; When strand at crystallizer when Way out slides, four copper coins produce one at horizontal segment and leave the small traversing of base shell under the drive unit effect, and the resistance of throwing is reduced, and make under bigger tapering condition to make throwing smooth; When strand at crystallizer when mouth of a river direction is slided, four copper coins produce one and press to the small traversing of base shell under the drive unit effect, the capacity of heat transmission is strengthened, and increases the frictional force of copper coin to the base shell simultaneously, make the crackle of initial camber section obtain repairing, improve slab quality; Casting speed is reached improve 20%, output improves greatly, and operating cost reduces.
Claims (8)
1, a kind of horizontal caster, comprise tundish, crystallizer and horizontal drawing device, the drawing device band strand, strand is pulled out to horizontal direction in crystallizer, described crystallizer is a fourplatemold, surrounds movable casting chamber by the copper coin combination that is no less than four, the camber section that casting chamber head makes progress for the molten steel inlet, the camber section is following to be horizontal segment, and accounting for the back segment casting chamber crystallizer of its cross-directional length more than 3/4 in the horizontal segment is straightway; Tundish is positioned at the top of crystallizer casting chamber head, with the crystallizer composition from state, the mouth of a river of tundish is facing to the molten steel inlet of crystallizer casting chamber head; The straightway of crystallizer be provided with the copper coin that makes the crystallizer straightway produce along perpendicular to the direction vibration of strand vertically to drive unit, have one to act on level that whole crystallizer makes it to vibrate back and forth in the horizontal direction simultaneously to drive unit.
2. horizontal caster according to claim 1, the horizontal segment cross-directional length that it is characterized in that said crystallizer is 1000～1800mm, the vertical height of crystallizer is 1.2～2 times of strand depth of sections.
3. horizontal caster according to claim 1, it is characterized in that said fourplatemold is fixed in the framework, saidly vertically be installed between the copper coin and said framework of crystallizer straightway to drive unit, said level is installed in said framework and supports between the frame of this framework to drive unit.
4. horizontal caster according to claim 1 is characterized in that saidly vertically having four to drive unit, is installed in the last copper coin of crystallizer straightway respectively, down between copper coin and and arranged on left and right sides copper coin and the said framework.
5. horizontal caster according to claim 1 is characterized in that between the camber section of said combination mould and the horizontal segment by radius of curvature being that 100～500 millimeters segmental arcs are connected smoothly.
6. horizontal caster according to claim 1 is characterized in that the cross sectional shape of said fourplatemold is square, rectangle, I-shaped or circular.
7. horizontal caster according to claim 1 is characterized in that the interval that said fourplatemold respectively makes up between the copper coin is not more than 0.2mm.
8. a billet withdrawing technology that adopts the described horizontal caster of claim 1 is characterized in that in process of billet withdrawal, is driven to drive unit by said level and makes the vibration back and forth in the horizontal direction of whole crystallizer, and amplitude is 2～6mm; Vertically make the vibration of the copper coin generation of crystallizer straightway perpendicular to strand to the drive unit driving by said, amplitude is 0.05～0.2mm; Said level is in the following manner vibrated cooperation with vertical to drive unit to drive unit: when level when drive unit makes the direction of vibration of crystallizer identical with the throwing direction, vertically press to strand to the copper coin of drive unit driving crystallizer straightway, when level when drive unit makes the direction of vibration of crystallizer opposite with the throwing direction, vertically the copper coin that drives the crystallizer straightway to drive unit leaves strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510034887 CN1872453A (en) | 2005-06-02 | 2005-06-02 | Horizontal conticaster and technique of billet withdrawal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510034887 CN1872453A (en) | 2005-06-02 | 2005-06-02 | Horizontal conticaster and technique of billet withdrawal |
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| Publication Number | Publication Date |
|---|---|
| CN1872453A true CN1872453A (en) | 2006-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510034887 Pending CN1872453A (en) | 2005-06-02 | 2005-06-02 | Horizontal conticaster and technique of billet withdrawal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266923A (en) * | 2011-07-25 | 2011-12-07 | 上海亚新连铸技术工程有限公司 | Large-taper continuous casting crystallizer copper pipe based on blank shell drawing-normalizing theory |
| CN111069555A (en) * | 2020-02-10 | 2020-04-28 | 江西理工大学 | Coupled vibration casting method for improving surface quality of continuous casting ingot |
-
2005
- 2005-06-02 CN CN 200510034887 patent/CN1872453A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266923A (en) * | 2011-07-25 | 2011-12-07 | 上海亚新连铸技术工程有限公司 | Large-taper continuous casting crystallizer copper pipe based on blank shell drawing-normalizing theory |
| CN111069555A (en) * | 2020-02-10 | 2020-04-28 | 江西理工大学 | Coupled vibration casting method for improving surface quality of continuous casting ingot |
| CN111069555B (en) * | 2020-02-10 | 2021-09-10 | 江西理工大学 | Coupled vibration casting method for improving surface quality of continuous casting ingot |
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