CN103084551A - Non-vibrating demolding method of crystallizer used for continuous casting and crystallizer - Google Patents
Non-vibrating demolding method of crystallizer used for continuous casting and crystallizer Download PDFInfo
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- CN103084551A CN103084551A CN2013100302863A CN201310030286A CN103084551A CN 103084551 A CN103084551 A CN 103084551A CN 2013100302863 A CN2013100302863 A CN 2013100302863A CN 201310030286 A CN201310030286 A CN 201310030286A CN 103084551 A CN103084551 A CN 103084551A
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Abstract
The invention relates to a crystallizer of non-vibrating demolding and a non-vibrating demolding method. The crystallizer of non-vibrating demolding is provided with an outer crystallizer, wherein the outer crystallizer is composed of a plurality of outer crystallizer blocks which are arranged adjacently, the cross section of each outer crystallizer block is trapezoid-wedge-shaped, the outer crystallizer blocks are arranged tightly and can move horizontally along the radial direction, and each outer crystallizer block is provided with a cooling water channel. The outer crystallizer blocks can independently move along the radial direction, and the exterior of each outer crystallizer block is communicated with water to be cooled. Compared with the prior art, the method is small in demolding force, and the demolding is easy to achieve. Due to the fact that time of the contact between liquid steel in the crystallizer and the wall of the crystallizer is long, the freezing speed is high, composition segregation inside a formed cast blank is small and the grains are fine. The non-vibrating demolding mode obviously improves the quality of the surfaces and the interior of tube blanks, and the defects including flaws, slag inclusion and the like are avoided.
Description
Technical field
The invention relates to a kind of release method and a kind of crystallizer of casting mold for continuous casting, especially a kind of be different from known need crystallizer integral body is carried out repeatedly up-down vibration stripping means non-vibration formula release method and can realize the crystallizer of the method.
Background technology
Continuous casting is modern important production method of smelting in production process, adopts continuous cast method can greatly improve smelting production efficiency, reduces workman's labour intensity, reduces production costs simultaneously.And in the continuous casting production process in modern times, the be known as heart of conticaster of crystallizer, its function is to force the high-temperature molten steel that continuously injects in its chamber cooling by cooling wall, derive its heat, make molten steel be frozen into required section configuration and certain thickness base shell in crystallizer, core still for liquid strand constantly is drawn out from the bottom of crystallizer, is entered two cold-zones.
At present, in order to prevent that strand from boning with the crystallizer inwall in process of setting, make the strand that forms the base shell be pulled out smoothly crystallizer, known release method is for adopting crystallizer body vibration mode, that is: molten steel injects crystallizer, repeatedly up-down vibration by crystallizer disengages crystallizer wall and initial solidification shell, then will send crystallizer with the base shell of liquid core, continues to be frozen into final products-strand in two cold-zones.The mode of production of this vibration can form crackle, dark oscillation mark, slag inclusion, pit and pipe at casting billet surface; Because the mold oscillation demoulding acts frequently, base shell and crystallizer wall are short time of contact, and the most of the time strand is to carry out heat exchange by air gap and crystallizer, so its cooling velocity is slow, and cause the segregation of strand internal component large; Go out crystallizer with the fragile strand of liquid core also will be through by bending-process of aligning, easily produce underbead crack.
In addition, traditional crystallizer can't be produced hollow strand, also will adopt perforation method prepare hollow bloom with solid strand, this process technology limit pipe length and steel grade that some is special also can't carry out.
Because the defective that above-mentioned known technology exists, the inventor is according to the Production design experience of being engaged in for many years this area and association area, develop non-vibration formula release method of the present invention and realize the crystallizer of the method, can produce hollow casting blank and solid strand, to overcome the problems referred to above.
Summary of the invention
The non-vibration formula release method that the purpose of this invention is to provide a kind of casting mold for continuous casting, and the crystallizer that can realize the method, compare known release method and crystallizer, its good cooling results, casting billet surface and internal soundness are high, can produce hollow casting blank and solid strand.
For this reason, the present invention proposes the crystallizer of a kind of non-vibration formula demoulding, it has an outer crystallizer, described outer crystallizer is comprised of the outer crystallizer block of the adjacent setting of polylith, the cross section of every outer crystallizer block is trapezoidal voussoir shape, and each described outer crystallizer block close-packed arrays forms mold cavity, every described outer crystallizer block all can be radially outwards traversing, and be equipped with cooling-water duct in each described outer crystallizer block.
The crystallizer of the non-vibration formula as above demoulding wherein, is provided with an interior crystallizer in described outer crystallizer, forms mold cavity between this outer crystallizer and interior crystallizer, the casting hollow casting blank; Described interior crystallizer is made of a plurality of interior crystallizer blocks, and the cross section of every interior crystallizer block all is trapezoidal voussoir shape; And be provided with cooling-water duct in each described interior crystallizer block.
The crystallizer of the non-vibration formula as above demoulding wherein, is matched in clearance between each described interior crystallizer block, and every described interior crystallizer block all can be radially inwardly traversing; And be equipped with cooling-water duct in each described interior crystallizer block.
The crystallizer of the non-vibration formula as above demoulding, wherein, described outer crystallizer block, interior crystallizer block can be synchronously or are radially traversing independently.
The present invention also provides a kind of non-vibration release method of casting mold for continuous casting, utilize the crystallizer of the non-vibration formula as above demoulding, pass into cooling water in each described outer crystallizer block, during the cooling formation initial solidification shell of molten steel surface in entering described outer crystallizer, described outer crystallizer block moves to the direction away from described initial solidification shell, realizes the demoulding.
The non-vibration release method of casting mold for continuous casting as above, wherein, the cross section of every described outer crystallizer block is trapezoidal voussoir, each described outer crystallizer block close-packed arrays, and can synchronously or independently radially outwards move.
The non-vibration release method of casting mold for continuous casting as above wherein, arranges an interior crystallizer in described outer crystallizer, and the hollow casting blank of can casting forms mold cavity between this outer crystallizer and interior crystallizer; Described interior crystallizer is made of polylith interior crystallizer block, and the cross section of every outer crystallizer block or interior crystallizer block all is trapezoidal voussoir shape; Each described outer crystallizer block close-packed arrays forms described outer crystallizer, and can synchronously or independently radially outwards move.
The non-vibration release method of casting mold for continuous casting as above, wherein, be matched in clearance between each described interior crystallizer block, and can radially move inward independently, when moving to the gap of eliminating between two adjacent interior crystallizer blocks, the inwall of described interior crystallizer and described initial solidification shell break away from.
The crystallizer of the non-vibration formula of the present invention demoulding and characteristics and the advantage of release method are:
The interior crystallizer block and the outer crystallizer block that consist of crystallizer of the present invention can independently move, and compare knockout press of the present invention with known technology little, and the demoulding is easier to; Having overcome known technology need repeatedly vibrate the demoulding and cause the most of the time to be actually by air gap and crystallizer with the strand of liquid core to carry out heat exchange, the defective that heat exchanger effectiveness is lower.In non-vibration formula release method of the present invention and device, strand (before demoulding) before inside and outside crystallizer transverse shifting with the liquid core is to contact with crystallizer all the time, so heat exchanger effectiveness is higher, and its setting rate is fast, the component segregation of the strand inside that is shaped is little, and crystal grain is fine and closely woven; Adopt non-vibration formula stripping means of the present invention to can significantly improve surface and the internal soundness of pipe, avoided the defective of crackle and slag inclusion etc.Description of drawings
The following drawings only is intended to the present invention is done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is an example structure schematic diagram (producing solid strand) of the crystallizer for non-vibration formula release method of the present invention;
Fig. 2 is another example structure schematic diagram (production hollow casting blank) of the crystallizer for non-vibration formula release method of the present invention;
Fig. 3 is the interior crystallizer block that consists of inside and outside crystallizer, the profile schematic diagram of outer crystallizer block;
Fig. 4 is the local enlarged diagram of an embodiment of interior crystallizer of the present invention;
Fig. 5 is the local enlarged diagram of an embodiment in interior crystallizer of the present invention;
Fig. 6 is multiple type of drive wherein a kind of of inside and outside crystallizer voussoir---hydraulic-driven schematic diagram;
The drawing reference numeral explanation:
1, outer crystallizer 10, outer crystallizer block 2, interior crystallizer 20, interior crystallizer block
201, first move block 202, second and move block 2011, clinch 2021, carrier
3, hollow casting blank 4, solid strand
The specific embodiment
The present invention proposes the crystallizer of a kind of non-vibration formula demoulding, it has an outer crystallizer, described outer crystallizer is comprised of the outer crystallizer block of the adjacent setting of polylith, the cross section of every outer crystallizer block is trapezoidal voussoir shape, each described outer crystallizer block close-packed arrays forms mold cavity, the solid strand of casting.Every described outer crystallizer block all can be radially outwards traversing, and be equipped with cooling-water duct in each described outer crystallizer block.
In addition, in crystallizer, an interior crystallizer can be set outside, form mold cavity between this outer crystallizer and interior crystallizer, the casting hollow casting blank; Described interior crystallizer is made of a plurality of interior crystallizer blocks, and the cross section of every interior crystallizer block all is trapezoidal voussoir shape; Be matched in clearance between each described interior crystallizer block, the size in gap is as the criterion can allow interior crystallizer block and strand to disengage, and every interior crystallizer block all can be radially inwardly traversing, and be equipped with cooling-water duct in each described interior crystallizer block.
The present invention also proposes a kind of non-vibration release method of casting mold for continuous casting, utilize the crystallizer of the non-vibration formula as above demoulding, pass into cooling water in each described outer crystallizer block, during the cooling formation initial solidification shell of molten steel surface in entering described outer crystallizer, described outer crystallizer block moves to the direction away from described initial solidification shell, realizes the demoulding.
Form mold cavity, the solid strand of casting in described outer crystallizer; Every cross section is close-packed arrays between the outer crystallizer block of trapezoidal voussoir shape, and can radially outwards move independently.
Further, be provided with an interior crystallizer in described outer crystallizer, the hollow casting blank of can casting forms mold cavity between this outer crystallizer and interior crystallizer; Described interior crystallizer is made of polylith interior crystallizer block, and the cross section of every outer crystallizer block or interior crystallizer block all is trapezoidal voussoir shape; Each described outer crystallizer block close-packed arrays forms described outer crystallizer, and can radially outwards move; Be matched in clearance between each described interior crystallizer block, and can radially move inward independently, when moving to the gap of eliminating between two adjacent interior crystallizer blocks, the inwall of described interior crystallizer and described initial solidification shell (strand) break away from.
no matter non-vibration formula release method of the present invention and the crystallizer that can realize the method are owing to being that outer crystallizer or interior crystallizer consist of by the crystallizer block that the polylith cross section is trapezoidal voussoir shape, each outer crystallizer block, the interior crystallizer block can both be simultaneously or is radially traversing independently, crystallizer is separated with the strand (initial solidification shell) of formation, thereby method of the present invention is compared with known technology with structure and has been reduced the initial solidification shell that forms in the crystallizer and the knockout press of crystallizer, casting billet surface and inner quality have obviously been improved, can effectively avoid the defectives such as the crackle of strand and slag inclusion.
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, below in conjunction with accompanying drawing and preferred embodiment, to the non-vibration formula release method of casting mold for continuous casting of the present invention and realize the specific embodiment, structure, feature and the effect of the crystallizer of the method, be described in detail as follows.In addition, by the explanation of the specific embodiment, when can be to reach technological means and the effect that predetermined purpose takes more to be goed deep into concrete understanding to the present invention, however institute's accompanying drawing only be to provide with reference to and explanation use, the present invention is limited.
As shown in Fig. 1,3, the crystallizer of the non-vibration formula demoulding that the present invention proposes has an outer crystallizer 1, this outer crystallizer 1 is comprised of the outer crystallizer block 10 of the adjacent setting of polylith, the cross section of every outer crystallizer block 10 is trapezoidal voussoir shape, it is whole that each outer crystallizer block 10 close-packed arrays form the outer crystallizer of a column, form mold cavity in it, solid strand 4 can be used for casting.And every outer crystallizer block 10 can be radially outwards traversing, in addition, all is provided with the cooling-water duct (not shown) in every outer crystallizer block 10.
Please coordinate referring to Fig. 2, in another specific embodiment, be provided with outside an interior crystallizer 2 in crystallizer 1, form mold cavity between this outer crystallizer 1 and interior crystallizer 2, hollow casting blank 3 can be used for casting; Described interior crystallizer 2 is made of a plurality of interior crystallizer blocks 20, and the cross section of every interior crystallizer block 20 all is trapezoidal voussoir shape; And be provided with cooling-water duct in each described interior crystallizer block 20.
As shown in Figure 4, in a feasible technical scheme, be matched in clearance between each described interior crystallizer block 20, the size in gap is as the criterion can allow interior crystallizer block 20 and strand to disengage, and every interior crystallizer block 20 can synchronously or independently radially move inward.
As shown in Figure 5, in another feasible technical scheme, in order to prevent that the molten steel in casting process from leaking, described interior crystallizer block 20 moves block 201 and second by first and moves block 202 setting of being separated by, and move block 201 front ends towards first of mold cavity one side and be overlapped in the second front end that moves block 202, to stop the leakage of molten steel.For example, the first front end that moves block 201 can form the front end that the clinch 2011, the second that protrudes to both sides moves block 202 and can form the carrier 2021 that matches with described clinch 2011.In a specific embodiment as shown in Figure 5, the mating surface of this clinch 2011 forms to the inclined-plane of both sides outer inclination, and the both sides of carrier 2021 form inwardly oblique inclined-plane, after described first green compact form, described second moves block 202 moves block 201 prior to described first and moves to the direction away from described initial solidification shell, second moves block 202 break away from strand after, first moves block 201 again to moving away from the initial solidification shell direction, completes demoulding step.
The non-vibration release method of casting mold for continuous casting of the present invention is, utilize the crystallizer of the non-vibration formula as above demoulding, pass into cooling water in each described crystallizer block, during the cooling formation initial solidification shell of the molten steel surface in entering described crystallizer, described crystallizer block moves to the direction away from described initial solidification shell, realizes the demoulding.
When producing solid strand, the interior formation mold cavity of described outer crystallizer 1 can form solid strand; Every cross section is outer crystallizer block 10 close-packed arrays of trapezoidal voussoir, and can be radially outside traversing to away from initial solidification shell, realize the demoulding.The present invention is provided with an interior crystallizer 2 in described outer crystallizer 1 when the casting hollow casting blank, form mold cavity between this outer crystallizer 1 and interior crystallizer 2.Outer crystallizer 1 and interior crystallizer 2 consist of by the outer crystallizer block 10 of polylith or interior crystallizer block 20, and the cross section of every outer crystallizer block 10 or interior crystallizer block 20 all is trapezoidal voussoir shape.
Wherein, have small gap H between each interior crystallizer block 20, form matched in clearance, every interior crystallizer 20 can synchronously or independently radially move inward, when moving to the gap of eliminating between two adjacent interior crystallizer blocks 20, the inwall of described interior crystallizer 2 and initial solidification shell break away from.In the present invention, the magnitude numerical value of the gap H between interior crystallizer block 20 is not limited, and to after movement, the interior wall energy of interior crystallizer 2 and strand disengage and be as the criterion with interior crystallizer block 20.
In order to prevent that the molten steel in casting process from leaking, reduce molten steel overheat before casting increases the intensity of cooling of adjacent two described crystallizer blocks, shortens the time of molten steel surface formation initial solidification shell.Owing to having minim gap between two adjacent interior crystallizer blocks 20, for preventing that molten steel from invading in gap H between two adjacent interior crystallizer blocks 20, one of method that adopts sees also Fig. 4, its principle is the degree of superheat of reduce molten steel before casting, increase the intensity of cooling of adjacent two interior crystallizer blocks 20, shorten the time that molten steel surface forms initial solidification shell.Molten steel can be frozen into initial solidification shell immediately once contact interior crystallizer block 20 like this, and this initial solidification shell can stop molten steel to continue to invade in gap H between two adjacent interior crystallizer blocks 20 to go.
In another feasible scheme, see also Fig. 5, the interior crystallizer block can also adopt method that the termination overlaps to prevent the leakage of molten steel, during the demoulding, second moves block 202 and first moves inward with hollow casting blank 3 and disengage, and then first moves block 201 and moves inward with hollow casting blank 3 again and disengage.Stop molten steel to invade in gap H between two adjacent interior crystallizer blocks and also have a lot of methods, just do not given unnecessary details one by one herein.
In addition, drive inside and outside crystallizer block 20,10 modes that move have a variety of, for example parallel four-link mechanism drives, cam slide mechanism driving etc., represented in Fig. 6 that a kind of hydraulic way that adopts drives the structural representation that crystallizer block piece moves, wherein C is that interior crystallizer block 20 drives hydraulic pressure unit, and D is that outer crystallizer block 10 drives hydraulic pressure unit.
Operation principle of the present invention is: the crystallizer of the non-vibration formula demoulding that the present invention proposes is mainly used in producing hollow casting blank or solid strand in continuous casting production.take the casting hollow casting blank as example, in the cavity of crystallizer 1 and interior crystallizer 2 compositions, cooled and solidified becomes hollow casting blank 3 outside molten steel injects, each that then will form outer crystallizer 1 independently outer crystallizer block 10 radially F outwards move, outer crystallizer 1 is disengaged with hollow casting blank 3, with form interior crystallizer 2 each independently interior crystallizer block 20 radially M move inward, interior crystallizer 2 and hollow casting blank 3 are disengaged, namely, when entering the cooling formation initial solidification shell of molten steel surface in described crystallizer, the block of described composition crystallizer moves to the direction away from described initial solidification shell, realize the demoulding.Then strand is pulled out the crystallizer of the non-vibration formula of the present invention demoulding.
To be crystallizers break away from the mode of non-vibration and strand characteristics of the present invention, and the demoulding is easy, and strand and crystallizer wall are long time of contact, good cooling results, and casting billet surface and internal soundness are high; Particularly this crystallizer hollow pipe of can casting, have very strong practicality.
The above only is the schematic specific embodiment of the present invention, is not to limit scope of the present invention.Any those skilled in the art, the equivalent variations of doing under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.And need to prove, each part of the present invention is not limited in above-mentioned overall applicability, each technical characterictic of describing in specification of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, other combination relevant with this case inventive point and concrete the application have been contained in the present invention in the nature of things.
Claims (8)
1. the crystallizer of the non-vibration formula demoulding, it is characterized in that, the crystallizer of the described non-vibration formula demoulding has an outer crystallizer, described outer crystallizer is comprised of the outer crystallizer block of the adjacent setting of polylith, the cross section of every outer crystallizer block is trapezoidal voussoir shape, and each described outer crystallizer block close-packed arrays forms mold cavity, every described outer crystallizer block all can be radially outwards traversing, and be equipped with cooling-water duct in each described outer crystallizer block.
2. the crystallizer of the non-vibration formula as claimed in claim 1 demoulding, is characterized in that, is provided with an interior crystallizer in described outer crystallizer, forms mold cavity between this outer crystallizer and interior crystallizer, the casting hollow casting blank; Described interior crystallizer is made of a plurality of interior crystallizer blocks, and the cross section of every interior crystallizer block all is trapezoidal voussoir shape; And be provided with cooling-water duct in each described interior crystallizer block.
3. the crystallizer of the non-vibration formula as claimed in claim 2 demoulding, is characterized in that, is matched in clearance between each described interior crystallizer block, and every described interior crystallizer block all can be radially inwardly traversing; And be equipped with cooling-water duct in each described interior crystallizer block.
4. the crystallizer of the non-vibration formula as claimed in claim 3 demoulding, is characterized in that, described outer crystallizer block, interior crystallizer block can be synchronously or be radially traversing independently.
5. the non-vibration release method of a casting mold for continuous casting, utilize the crystallizer of the non-vibration formula as claimed in claim 1 demoulding, pass into cooling water in each described outer crystallizer block, during the cooling formation initial solidification shell of molten steel surface in entering described outer crystallizer, described outer crystallizer block moves to the direction away from described initial solidification shell, realizes the demoulding.
6. the non-vibration release method of casting mold for continuous casting as claimed in claim 5, is characterized in that, the cross section of every described outer crystallizer block is trapezoidal voussoir, each described outer crystallizer block close-packed arrays, and can synchronously or independently radially outwards move.
7. the non-vibration release method of casting mold for continuous casting as claimed in claim 5, is characterized in that, in described outer crystallizer, an interior crystallizer is set, and the hollow casting blank of can casting forms mold cavity between this outer crystallizer and interior crystallizer; Described interior crystallizer is made of polylith interior crystallizer block, and the cross section of every outer crystallizer block or interior crystallizer block all is trapezoidal voussoir shape; Each described outer crystallizer block close-packed arrays forms described outer crystallizer, and can synchronously or independently radially outwards move.
8. the non-vibration release method of casting mold for continuous casting as claimed in claim 7, it is characterized in that, be matched in clearance between each described interior crystallizer block, and can radially move inward independently, when moving to the gap of eliminating between two adjacent interior crystallizer blocks, the inwall of described interior crystallizer and described initial solidification shell break away from.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103418761A (en) * | 2013-08-12 | 2013-12-04 | 中国重型机械研究院股份公司 | Polygon curved surface inner wall crystallizer for continuous casting of tube blank |
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| JP3257222B2 (en) * | 1994-01-12 | 2002-02-18 | 住友金属工業株式会社 | Curved mold for continuous casting of metal |
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| US3708010A (en) * | 1971-09-17 | 1973-01-02 | Schloemann Ag | Apparatus for the continuous casting of tubes |
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| JPH04288946A (en) * | 1991-03-18 | 1992-10-14 | Sumitomo Metal Ind Ltd | Mold for continuous casting and continuous casting method using this mold |
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