CN201380275Y - Plate blank continuous casting crystallizer - Google Patents

Plate blank continuous casting crystallizer Download PDF

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Publication number
CN201380275Y
CN201380275Y CN200920035404U CN200920035404U CN201380275Y CN 201380275 Y CN201380275 Y CN 201380275Y CN 200920035404 U CN200920035404 U CN 200920035404U CN 200920035404 U CN200920035404 U CN 200920035404U CN 201380275 Y CN201380275 Y CN 201380275Y
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CN
China
Prior art keywords
continuous casting
plate
crystallizer
narrow
plates
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 - Fee Related
Application number
CN200920035404U
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Chinese (zh)
Inventor
胡恒法
裴新华
穆海玲
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.)
Shanghai Meishan Iron and Steel Co Ltd
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Shanghai Meishan Iron and Steel Co Ltd
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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Priority to CN200920035404U priority Critical patent/CN201380275Y/en
Application granted granted Critical
Publication of CN201380275Y publication Critical patent/CN201380275Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a plate blank continuous casting crystallizer, which belongs to the field of metallurgical continuous steel casting equipments. The crystallizer comprises a rectangular work cavity formed two relatively-wide side plates and two relatively-narrow side plates; a cooling water groove in circuitous distribution is formed on the outer surface of the rectangular work cavity; arc transitional curved surfaces are formed on the adjacent edges of the narrow-side plates and the wide-side plates; and a quadrangle of the rectangular work cavity adopts transitional round corners formed by the arc transitional curved surfaces. The utility model has the beneficial effects that the utility model can effectively avoid the steel leakage accidents at the corners of the casting blank during the cracking and continuous casting process, also solves the problem of insufficient continuous casting protection slag flowing between the copper sheet and the blank casing at the corners of the crystallizer, and overcomes the defect of creased skin on the surface of the sides of a heat rolling plate.

Description

Continuous casting crystallizer for plate billet
Technical field
The utility model relates to a kind of continuous cast mold, and especially a kind of continuous casting crystallizer for plate billet belongs to metallurgical continuous casting equipment field.
Background technology
Crystallizer is the very important parts of conticaster.Molten steel cools off the strand profile that tentatively is frozen into certain shell thickness in crystallizer, and is pulled out from the crystallizer end opening continuously, enters two cold-zones.The effect of crystallizer is: under certain pulling rate, guarantee that it is the base shell that forms adequate thickness that strand goes out crystallizer, make going on of casting process safety, and determined the production capacity of conticaster, molten steel in the crystallizer is given copper coin with the conduction of heat balance simultaneously, peripheral shell thickness can be grown uniformly, guarantee cc billet surface quality.Therefore continuous cast mold directly influences the quality of continuous casting billet and follow-up heat processing technique thereof.
Existing steel-making continuous casting crystallizer is made up of four copper plate of crystallizer, two broadsides wherein, two narrow limits.The back side of copper plate of crystallizer is processed with tank, is used for leading to cooling water.The copper plate of crystallizer front is coated with alloy layers such as chromium, nickel, dilval, nickel cobalt (alloy) and cobalt-nickel alloy.Four copper plate of crystallizer have constituted the rectangle work inner chamber of crystallizer, and the thickness in rectangular inner cavity cross section is generally 50~250mm, and width is 500~2500mm.
Four angles, work inner chamber square-section of existing continuous cast mold are the right angle, influence continuous casting billet quality and follow-up hot rolling processing characteristics, have following problem:
1. the heat transfer of crystallizer right angle portion is a two dimension, begins to solidify the fastest, shrinks the earliest, form air gap the earliest, so folding corner region base shell is the thinnest, so the continuous casting billet bight is the weak link that produces corner crack and bleed-out takes place.
2. after slab goes out continuous cast mold, enter secondary cooling zone, when the secondary intensity of cooling was excessive, the bight cooling velocity was fast, can cause stress, strain to concentrate, and also caused the bight cracking easily.
3. the continuous casting covering slag at place, crystallizer bight flows into deficiency between copper coin and base shell, and lubricant effect is poor, therefore causes surface quality of continuously cast slab defective and bleed-out easily.
4. cross section four limits are that the rectangular slab at right angle is transferred wide when rolling at the hot rolling edger roll, seem very little owing to transfer wide drafts to compare with width of plate slab, distortion can not be penetrated into the central part of width of plate slab, only produce the areal deformation of slab side, make roughing intermediate blank limit portion that more sharp-pointed projection (dog bone shape section) take place, boss is under the impact of cooling water, temperature sharply descends, enter high temperature inductile district, the part takes place when flat rolling subsequently tear, what show as hot rolling edges of boards portion surface sticks up the skin defective.
The utility model content
The purpose of this utility model is the problem that exists at above-mentioned prior art, and a kind of new type of plate blank continuous casting crystallizer that can effectively avoid the strand corner crack is provided.
The technical solution adopted in the utility model is, continuous casting crystallizer for plate billet, the rectangle working chamber of being made up of the relative narrow side plate with two of two relative width edge plates constitutes, the outer surface of described rectangle working chamber is shaped on the circuitous bosh that distributes, the knuckle that the arc transition curved surface that described narrow side plate and width edge plate adjacent side have, the quadrangle of described rectangle working chamber become the arc transition curved surface to constitute.
It is that the bosh degree of depth at the described narrow side plate arc transition curved surface back side is greater than the bosh degree of depth at other position that the utility model further improves.
The beneficial effects of the utility model are, because four jiaos of this continuous casting crystallizer for plate billet square-section is the arc fillet, be one dimensional heat transfer, the molten steel solidification speed at the molten steel solidification speed at this place and four limits place approaching, therefore the casting blank shell thickness on the whole interface is approaching, the time that strand shrinks is also consistent, thereby can effectively avoid the strand corner crack.And continuous casting billet is between two cold-zones, and the cooling velocity at arc fillet place and the cooling velocity on four limits are also approaching substantially.Therefore improved should the zone heat transfer type, be positioned in addition the arc transition curved surface back side bosh depth compensation the increase of thickness of slab herein, therefore make that the intensity of cooling around the continuous cast mold cross section is even, the molten steel solidification speed at molten steel solidification speed and four limits place approaching, avoided owing to conduct heat soon in the crystallizer bight generation of bleed-out accident when continuous casting billet chink that cooling causes by force and continuous casting.In addition, the continuous casting covering slag that the arc fillet has also solved place, crystallizer bight flows into not enough problem between copper coin and base shell, and the lubricant effect of the covering slag when having improved throwing has been avoided the surface quality of continuously cast slab defective and the bleed-out accident that cause thus.
Facts have proved, four angles of continuous casting steel billet cross section that the continuous cast mold continuous casting that to adopt four angles be the arc fillet obtains are arc, like this hot rolling edger roll transfer wide when rolling roughing intermediate blank limit portion more sharp-pointed protruding phenomenon (dog bone section) takes place obtains very big alleviating, that has therefore avoided consequent hot rolling edges of boards portion surface sticks up the skin defective.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the structural representation of the utility model embodiment two.
Among the figure, 1 is the broadside copper coin, 2 is narrow limit copper coin, 3 and 5 is the arc radius size, 4 and 7 are the distance for circular arc center of circle place straight line and narrow limit copper coin limit portion, 6 is two distances between the copper coin of narrow limit, and 8 is the bosh at copper coin back, arc-shaped transition curved surface place, and 9 is the tank at working face back, crystallizer plane.
The specific embodiment
Embodiment one
The crystallizer of present embodiment as shown in Figure 1, two broadside copper coins 1 and two narrow limit copper coins 2 have surrounded the crystallizer square-section.Whole outer surface is shaped on circuitous uniform bosh.Narrow limit copper coin 2 is connected by two arc transition faces with broadside copper coin 1, the scope of its arc radius size 3 is 2~20mm, distance 4 scopes of circular arc center of circle place straight line and narrow limit copper coin limit portion are 2~20mm, and distance 4≤arc radius size 3, thereby form the structure that the arc transition curved surface is connected with width edge plate inner surface rounding off.
The degree of depth of the bosh 8 at copper coin back, arc-shaped transition curved surface place is greater than the even depth bosh 9 at other position, plane, thus the increase of compensating plate wall thickness, and concrete depth dimensions and arcwall face are complementary.Preferably the enveloping surface of all bosh bottom formation becomes equidistant surface with the inner surface of narrow limit copper coin, can make cooling reach perfect condition as far as possible uniformly like this.
Embodiment two
The structure of present embodiment as shown in Figure 2, different with embodiment one is, the scope of arc radius 5 is 2~20mm, the scope of circular arc center of circle place straight line and narrow boards intralamellar part plane working face distance 7 is 2~20mm, and distance 7≤arc radius size 5, thereby form the structure of arc transition curved surface by narrow side plate inner surface rounding off.By regulating two distances 6 between the copper coin of narrow limit, it is wide to can be implemented in the line accent, the continuous casting steel billet of casting different width dimensions.
Facts have proved, the crystallizer of above embodiment has overcome the deficiency that work on hand inner chamber square-section four angles are the continuous casting crystallizer for plate billet at right angle, and by the cooling water tank that designs and four corner shape of continuous cast mold are complementary, make around the continuous cast mold cross section intensity of cooling even, the molten steel solidification speed at molten steel solidification speed and four limits place approaching, the skin defective is stuck up in the chink when having reduced continuous casting, bleed-out and hot rolling edges of boards portion.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims (5)

1. continuous casting crystallizer for plate billet, the rectangle working chamber of being made up of the relative narrow side plate with two of two relative width edge plates constitutes, the outer surface of described rectangle working chamber is shaped on the circuitous bosh that distributes, it is characterized in that: the knuckle that the arc transition curved surface that described narrow side plate and width edge plate adjacent side have, the quadrangle of described rectangle working chamber become the arc transition curved surface to constitute.
2. continuous casting crystallizer for plate billet according to claim 1 is characterized in that: the bosh degree of depth at the described narrow side plate arc transition curved surface back side is greater than the bosh degree of depth at other position.
3. continuous casting crystallizer for plate billet according to claim 2 is characterized in that: the enveloping surface that described bosh bottom forms becomes equidistant surface with the inner surface of narrow limit copper coin.
4. according to claim 2 or 3 described continuous casting crystallizer for plate billet, it is characterized in that: described arc transition curved surface and width edge plate inner surface rounding off.
5. according to claim 2 or 3 described continuous casting crystallizer for plate billet, it is characterized in that: described arc transition curved surface and narrow side plate inner surface rounding off.
CN200920035404U 2009-03-17 2009-03-17 Plate blank continuous casting crystallizer Expired - Fee Related CN201380275Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920035404U CN201380275Y (en) 2009-03-17 2009-03-17 Plate blank continuous casting crystallizer

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Application Number Priority Date Filing Date Title
CN200920035404U CN201380275Y (en) 2009-03-17 2009-03-17 Plate blank continuous casting crystallizer

Publications (1)

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CN201380275Y true CN201380275Y (en) 2010-01-13

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101920317A (en) * 2010-08-09 2010-12-22 河北文丰钢铁有限公司 Rectangular casting blank crystallizer
CN102328037A (en) * 2011-09-21 2012-01-25 首钢总公司 Chamfered crystallizer with taper continuous casting plate blank
CN104801683A (en) * 2015-04-17 2015-07-29 钢铁研究总院 Narrow-side copper plate for reducing on-line width regulating resistance of plate blank crystallizer
CN105108086A (en) * 2015-09-15 2015-12-02 西峡龙成特种材料有限公司 Chamfered continuous casting crystallizer narrow-surface dynamic plate
CN107952795A (en) * 2017-11-28 2018-04-24 攀钢集团西昌钢钒有限公司 A kind of hot strip rolling manufacture craft
CN109434044A (en) * 2018-11-29 2019-03-08 李泽朋 Band makes the reasonable continuous casting crystallining copper sheet mode structure of unrestrained effect cooling structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101920317A (en) * 2010-08-09 2010-12-22 河北文丰钢铁有限公司 Rectangular casting blank crystallizer
CN102328037A (en) * 2011-09-21 2012-01-25 首钢总公司 Chamfered crystallizer with taper continuous casting plate blank
CN104801683A (en) * 2015-04-17 2015-07-29 钢铁研究总院 Narrow-side copper plate for reducing on-line width regulating resistance of plate blank crystallizer
CN105108086A (en) * 2015-09-15 2015-12-02 西峡龙成特种材料有限公司 Chamfered continuous casting crystallizer narrow-surface dynamic plate
CN105108086B (en) * 2015-09-15 2018-05-22 西峡龙成特种材料有限公司 A kind of continuous cast mold leptoprosopy dynamic plate with chamfering
CN107952795A (en) * 2017-11-28 2018-04-24 攀钢集团西昌钢钒有限公司 A kind of hot strip rolling manufacture craft
CN109434044A (en) * 2018-11-29 2019-03-08 李泽朋 Band makes the reasonable continuous casting crystallining copper sheet mode structure of unrestrained effect cooling structure

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C14 Grant of patent or utility model
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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100113

Termination date: 20180317