CN1150068C - Built-in soft-contact mould - Google Patents
Built-in soft-contact mould Download PDFInfo
- Publication number
- CN1150068C CN1150068C CNB001100734A CN00110073A CN1150068C CN 1150068 C CN1150068 C CN 1150068C CN B001100734 A CNB001100734 A CN B001100734A CN 00110073 A CN00110073 A CN 00110073A CN 1150068 C CN1150068 C CN 1150068C
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- crystallizer
- induction coil
- soft
- built
- crystallizer wall
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Abstract
The present invention relates to a built-in soft-contact crystallizer which belongs to metallurgic continuous casting devices. The built-in soft-contact crystallizer is composed of a crystallizer and an electromagnetic induction coil. The crystallizer of the present invention is characterized in that grooves are arranged at the inner side of metal walls in the primary solidification region of the crystallizer; the induction coil is placed in the grooves, and then, filling materials are filled in the grooves so that the filling materials are integrally and firmly connected with the crystallizer wall. Electromagnetic force can be directly exerted on the primary solidification region for steel melting in the crystallizer by the present invention, the shielding effects of the crystallizer wall on electromagnetic fields can be avoided, and the problem that the induction coil is damaged by high-temperature molten steel can be avoided. The electromagnetic fields have the functions of soft contact of metal, pressure regulation, etc.; the surface quality of continuous casting blanks is effectively improved.
Description
Technical field
The invention belongs to metallurgical continuous casting equipment, particularly a kind of built-in soft-contact electromagnetic continuous casting crystallizer.
Background technology
The principle of soft-contact mould continuous casting electromagnetic is to utilize the electromagnetic pressure in the electromagnetic field to alleviate the static pressure of molten steel to crystallizer wall, thereby reaches the purpose that molten steel and crystallizer wall solidify under the state of " the soft contact ".The structure of existing soft-contact mould generally is at the external metallization liquid level place of crystallizer wall one induction coil to be set, and passing to alternating current therein, the electromagnetic field that makes this coil produces an electromagnetic pressure P radially in the initial solidification district of crystallizer (meniscus surface area)
m, realize that soft contact solidifies.Yet, the soft-contact mould of this structure, because the shielding action of crystallizer wall, electromagnetic field can't be applied to metal bath surface and get on.Get in order to make electromagnetic force affact metal bath surface, general method is to adopt crystallizer joint-cutting technology, promptly vertically cuts some joint-cuttings and forms distinguish insulation and independent water-cooling structure along it on the top of crystallizer wall (meniscus surface area).General slot length is at 100MM, and width and is used the mica sheet filling betwixt about 1MM, in case bleed-out.There is following defective in the soft-contact mould of this structure:
Though 1, crystallizer wall joint-cutting technology makes electromagnetic force see through joint-cutting to affact on the metal bath surface,, it can't fundamentally avoid the shielding action of crystallizer wall.In fact, the overwhelming majority in the electromagnetic force has only a small part to affact on the liquid level owing to the shielding action of crystallizer wall loses.Therefore, the waste of electromagnetic force is very big.
2, the distribution of electromagnetic force in crystallizer is also very inhomogeneous.Electromagnetic force is big near the joint-cutting, often needs row shielding again, and non-joint-cutting zone electromagnetic force is little, need take enhancement measures.
Though 3, the joint-cutting technology makes electromagnetic force see through crystallizer wall to affact on the metal bath surface, improved the horizontal oscillation mark of continuous casting billet significantly, usually make the continuous casting billet surface produce the lengthwise streaking of projection at the joint-cutting place.
4, the joint-cutting specification requirement is very high, seaming and cutting are wide bleed-out, and shielding action that seaming and cutting are narrow is big.Simultaneously, because the crystallizer wall joint-cutting has formed a lot of independent water-cooled unit, make the water cooling system of crystallizer very complicated.
5, because electromagnetic force rate of decay in the space is very fast, and induction coil is provided with the outside of crystallizer wall, the decay of electromagnetic force in the space is also very big, can not be fully utilized.In addition, the somebody takes the way in the outer setting silicon steel yoke of crystallizer induction coil, stops the former electromagnetic force that spills in the space, and it is compressed in the space that yoke surrounds.Though this measure makes the electromagnetic force in the crystallizer obtain certain enhancing,, most electromagnetic forces still conductively-closed have been fallen and can not be fully utilized.Patent Office of the People's Republic of China has announced that " a kind of electromagnetic solenoid crystallizer " its outstanding feature is the splitted structure of wishing the cancellation crystallizer wall, acts directly on the metal bath surface electromagnetic force.But,, brought horizontal slit though cancelled vertical joint-cutting of crystallizer wall.And also exist: helix tube is connected with crystallizer wall is extremely difficult; Be difficult to sealing between induction coil circle and the circle, bleed-out is bound to; Induction coil directly contacts with high-temperature molten steel, problems such as the scaling loss that is bound to.
Summary of the invention
The object of the present invention is to provide a kind of shielding action that can avoid crystallizer wall, give full play to the built-in soft-contact mould of electromagnetic force.
The objective of the invention is to realize by following technical scheme.The present invention is at the inboard fluting of the metallic walls in crystallizer initial solidification zone (meniscus surface area), and induction coil is placed in the fluting, then the fluting in the filling packing material, this packing material is a kind of heat conduction non-conducting material, and make it firmly to link into an integrated entity with crystallizer wall, so both avoided the shielding action of crystallizer wall, and simultaneously also avoided induction coil directly to contact and the coil scaling loss that causes with high-temperature molten steel.Induction coil can be made with circle, ellipse and polygon metal tube, inner water flowing cooling, and the method for winding of induction coil can be a single head, also can be bull.
The present invention is placed on the inboard of crystallizer wall with induction coil, adopts the fluting of the non-conductive material filling crystallizer wall of heat conduction, and makes it to be combined into one securely with crystallizer wall.Because packing material is non-conductive, can not produce vortex flow in self, so can not produce shielding action to electromagnetic force, electromagnetic force is utilized fully, induction coil is built in the crystallizer wall inboard, and manufacturing process is simple, and is easy to process.It has avoided the splitted structure of crystallizer wall, has eliminated lobe seam bleed-out, has also simplified the water-cooling system of crystallizer.Therefore, the present invention has actual application prospect very widely, can be used for square billet, circle base, rectangular bloom, also can be used for shaped blank.Simultaneously, it can be used for straight mo(u)ld, also can be used for the arc crystallizer, both can be used for the monoblock type vibrating crystallizer, also can be used for split type vibrating crystallizer.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the built-in mode structural representation of another kind of the present invention,
Fig. 3 is the structural representation that the present invention implements at split type vibrating crystallizer.
Among the figure: 1 crystallizer copper wall, 2 induction coils, 3 induction coil insulating barriers, 4 packing materials, 5 metal bath surfaces and covering slag, 6 molten steel, 7 air gaps, 8 casting blank shells, 9 tundish, 10 mouths of a river.
The specific embodiment
As shown in the figure, the present invention is at the inboard fluting of crystallizer wall, the mode that induction coil is set in groove has two kinds: as shown in Figure 1 a kind of, around crystallizer wall, open a banded inside groove in the inboard initial solidification zone of crystallizer wall (meniscus surface area), with the induction coil integral installation in groove, then with will slot filling and make it firmly to link into an integrated entity of packing material with crystallizer wall; Another kind of structure as shown in Figure 2, be around crystallizer wall, to open a spirality inside groove in the inboard initial solidification zone of crystallizer wall (meniscus surface area), just be placed on each circle of induction coil in the spiral slot, then with the packing material filling of will slotting, and make it to link into an integrated entity securely with crystallizer wall.For guaranteeing safety in production, this kind crystallizer requires will suitably thicken in the outside of fluting position crystallizer wall.The height of the inboard fluting of crystallizer wall is generally 100MM, induction coil can be made with Φ 6～Φ 12MM copper pipe, coil is generally 2～6 circles, water flowing cooling in the pipe, to coil feed high frequency (frequency is above 20 kilo hertzs) or in, the alternating current of low frequency (as 50 hertz of power frequencies).
As shown in Figure 3, in split type vibrating crystallizer copper wall 1, induction coil 2 is set, with packing material induction coil and crystallizer are linked together securely, like this, just crystallizer wall is fitted together with its waterway and constitute the built-in soft split type vibrating crystallizer that contacts, molten steel in the tundish 9 10 enters crystallizer from the mouth of a river, and solidifies therein.When coil passed through alternating current, the molten steel at meniscus place will be subjected to the effect of electromagnetic pressure, alleviates the pressure of molten steel to crystallizer wall thereby reach, and is implemented in the purpose of solidifying under the soft contact condition.
The present invention makes electromagnetic force directly act on the initial solidification district of molten steel in the crystallizer, both avoided the shielding action of crystallizer wall to electromagnetic field, avoided high-temperature molten steel to damage the problem of induction coil again, slab surface quality is improved effectively to the effects such as soft contact pressure adjusting of metal in performance magnetic field.Simultaneously, simple in structure, the convenient processing and manufacture of the present invention is convenient to the production practical application.
Claims (3)
1, a kind of crystallizer and electromagnetic induction coil of comprising is at interior built-in soft-contact mould, it is characterized in that it being at the inboard fluting of the metallic walls in crystallizer initial solidification zone, induction coil is placed in the fluting, filling a kind of heat conduction and non-conductive filler makes it to link into an integrated entity securely with crystallizer wall in fluting then.
2, built-in soft-contact mould according to claim 1 is characterized in that saidly at the inboard fluting of crystallizer wall, and the mode that induction coil is set in groove has two kinds:
A. around crystallizer wall, open a banded inside groove in the inboard initial solidification of crystallizer wall zone, with the induction coil integral installation in groove;
B. around crystallizer wall, open a spirality inside groove in the inboard initial solidification of crystallizer wall zone, each circle of induction coil is placed in the spiral slot just.
3, built-in soft-contact mould according to claim 1 is characterized in that said induction coil can make inner water flowing cooling with circular, ellipse and polygon metal tube; The method for winding of induction coil can be single head, bull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001100734A CN1150068C (en) | 2000-01-28 | 2000-01-28 | Built-in soft-contact mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001100734A CN1150068C (en) | 2000-01-28 | 2000-01-28 | Built-in soft-contact mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266757A CN1266757A (en) | 2000-09-20 |
| CN1150068C true CN1150068C (en) | 2004-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001100734A Expired - Fee Related CN1150068C (en) | 2000-01-28 | 2000-01-28 | Built-in soft-contact mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1150068C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329144C (en) * | 2004-06-30 | 2007-08-01 | 宝山钢铁股份有限公司 | Multilayer glue jointing sealing method for full water cooling cutting seam soft contact crystallizer cutting seam |
-
2000
- 2000-01-28 CN CNB001100734A patent/CN1150068C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1266757A (en) | 2000-09-20 |
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