CN1302703A - Combined electromagnetic crystallizer for conticasting - Google Patents
Combined electromagnetic crystallizer for conticasting Download PDFInfo
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- CN1302703A CN1302703A CN 00110295 CN00110295A CN1302703A CN 1302703 A CN1302703 A CN 1302703A CN 00110295 CN00110295 CN 00110295 CN 00110295 A CN00110295 A CN 00110295A CN 1302703 A CN1302703 A CN 1302703A
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- crystallizer
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- conticasting
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Abstract
A combined electromagnetic crystallizer for conticasing is composed of crystallizer, soft-contact coil arranged in the curved region inside the copper wall of crystallizer, electromagnet with constant magnetic field positioned in the sprue area of crystallizer, electromagnetic stirrer near the bottom of crystallizer and filler for said induction coil. Its advantages include no shield of crystallizer wall to electromagnetic field, no damage of molten steel to crystallizer wall, and high surface and internal quality of castings.
Description
The invention belongs to metallurgy ingot casting equipment, used combined electromagnetic crystallizer for conticasting in particularly a kind of continuous-casting of steel billet.
The operation principle of electromagnetic agitating technology is followed two basic laws: electromagnetic induction and current and magnetic field interaction, promptly working as molten steel is in the alternating magnetic field, portion produces induced current within it, and this electric current and externally-applied magnetic field interact and produce magnetic force, promote the molten steel motion.In the crystallizer bottom internal soundness that electromagnetic mixing apparatus can improve strand is set, can makes the equiax crystal district bigger, grainiess is thinner, and central pipe is littler, and center segregation is low.But the main effect that stir the crystallizer bottom just promotes the molten steel motion, improve the solidification and heat transfer condition, can not produce soft contact action to the crystallizer meniscus, can not get rid of the foreign impurity in the molten steel, thus little to the effect of the surface quality of improving continuous casting billet and inner clamps foreign material.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 main effect of soft-contact mould technology is to improve slab surface quality, to improving the strand internal soundness, comprises that the eliminating of field trash and the effect that solidified structure is controlled are unsatisfactory.The principle of controlling that flows is to utilize the conduction molten steel to move and cutting magnetic line in constant magnetic field, thereby portion produces induced current within it, this induced current and externally-applied magnetic field interact, and produce the brake force opposite with the molten steel flow direction and control the flow regime of molten steel in crystallizer.Studies show that flow control technique can not only stable meniscus, suppress the speed that the mouth of a river goes out stream, reduce the impact depth of sinking, and can control flow field between the magnetic pole of top and the bottom effectively, and reduce effectively and be mingled with rerum natura slab quality defective, improve the quality of continuous casting billet.But flow control mold is not obvious to improving the slab surface quality action effect, and the purifying of steel of handling through flow control mold below the magnetic pole of bottom has formed piston flow in addition, and this is disadvantageous to solidification and heat transfer.Soft contact technique, flow control technique and electromagnetic agitating technology also are in independent development at present, mutually the stage of not merging.But soft contact technique and the fusion between soft contact technique and the electromagnetic agitating technology from beginning in 1997 provide the foundation for the fusion of this three technology.With regard to the single-phase technology in this three technology, from they action effects separately, soft contact technique stresses solving slab surface quality, flow control technique stresses the separation at external folder thing, and electromagnetic agitating technology stresses in the casting blank solidification organizational controls, and their effect respectively has emphasis that its defective is also respectively arranged.From heat-transfer character, soft contact technique and flow control technique have heat effect to liquid level, improved the last i of field trash and bubble, help their eliminating, electromagnetic agitating technology has then improved the heat transfer condition that forms the molten steel of piston flow after flow control technique purifies, thereby has improved the curing condition of strand.
The object of the present invention is to provide and a kind ofly in same crystallizer, can incorporate soft contact technique, flow control technique and electromagnetic agitating technology; Existing soft contact function has mobile control function again to get rid of field trash to improve cc billet surface quality, also has the electromagnetic agitation function to improve the casting blank solidification institutional framework, has multi-functional combined electromagnetic crystallizer for conticasting.
The present invention is made of crystallizer, soft contact induction coil, constant magnetic field electromagnet, electromagnetic mixing apparatus, packing material etc.
Further narrate content of the present invention below in conjunction with drawings and Examples.
Fig. 1 is a semi-section schematic diagram of the present invention,
Fig. 2 is the semi-section schematic diagram of the mode of establishing in the another kind of coil of the present invention,
The cross-sectional view that Fig. 3 implements on split type vibrating crystallizer for the present invention.
Among the figure: crystallizer copper wall 1, soft contact induction coil 2, constant magnetic field electromagnet 3, electromagnetic mixing apparatus 4, crystallizer outer wall 5, the mouth of a river 6, tundish 7.
As shown in the figure: the present invention adopts built-in mode with soft contact induction coil, is placed on crystallization The inboard meniscus surface area of device copper wall is filled with packing material. Built-in mode has two kinds: one Planting is that banded flute profile is made in crystallizer copper wall inboard, and induction coil integral body is placed in one, right Fill with packing material afterwards; Another kind of mode is that spirality is made in crystallizer copper wall inboard Groove is placed in one coil then, fills with packing material. Soft contact induction coil can be used 2～6 circles are generally made of square, garden shape or ellipse garden shape copper pipe, the appearance insulation, and copper pipe is straight The footpath is about 6～12MM, passes to about 20KHZ alternating current, and coil is hollow-core construction, and inner water flowing is cold But. Packing material is heat conduction and non electrically conductive material. With full width single bar-type electromagnet (electromagnetism The iron width suitably increases) be placed on the mold gap zone, and pass into therein DC current, Its voltage must not be higher than safe voltage (36V), generally is selected in 10～20V and is advisable, its electric current Intensity is selected to guarantee that the magnetic induction intensity of magnetic field center section is not less than 0.1T. With electromagnetism Agitating device is placed on the lower area that crystallizer approaches the bottom, and pass to therein low frequency (5～10Hz) alternating current. Induction coil is placed the inboard meniscus surface area of crystallizer copper wall, with filling out Fill Material Filling, both cancelled the crystallizer wall between induction coil and the molten steel, make induction coil Can be directly corresponding molten steel, the electromagnetic force direct effect that coil is produced is to molten steel, again with filling out Fill material and completely cut off molten steel and contact with the direct of coil, the protection coil. Pass into height at induction coil During the frequency alternating current, and non-conductive, section produces sense within it owing to a packing material heat conduction Give birth to electric current and magnetic field is produced shielding action, simultaneously, because it has the capacity of heat transmission, process of setting Still can carry out normally. Like this, utilize the soft contact action at meniscus place, improve casting The surface quality of base. Full width wall scroll shape electromagnet is located at the mold gap zone, and utilizing should Constant magnetic field comes the flow field in the crystallization control device and separates field trash. Electromagnetic mixing apparatus is put At the crystallizer lower area, the electromagnetic force of utilizing the low-frequency alternating electric current to produce promotes molten steel stream Moving, to improve the heat transfer condition of molten steel, to reach the purpose of improving Inner Quality of Billet.
Structure of the present invention, avoided crystallizer wall to the shielding action of electromagnetic field and The damage problem of high-temperature molten steel makes the electromagnetic pressure of soft contact can directly act on crystallization The first solidification zone of molten steel effectively improves the surface quality of continuous casting billet, and has again in the device Flow and control and the electromagnetic agitation function, improve the internal soundness of strand. The present invention can be used for plate Base also can be used for square billet and rectangular bloom; Can be used for straight mo(u)ld, also can be used for the arc crystallization Device; Can be used for the monoblock type vibrating crystallizer, also can be used for Split-type vibration mould. With The time, the present invention is simple in structure, convenient processing and manufacture.
Embodiment: the application of the present invention on split type vibrating crystallizer.
As shown in Figure 3: meniscus surface area is provided with induction coil 2 in split type vibrating crystallizer copper wall 1, with packing material induction coil and crystallizer are linked together securely, in the mold gap zone constant magnetic field electromagnet 3 is set, and electromagnetic mixing apparatus 4 is set at the crystallizer lower area, like this, just the soft contact technique of crystallizer, flow control technique and electromagnetic agitating technology are combined and constitute split and vibrate the combined electromagnetic crystallizer.Molten steel in the tundish 7,6 enter crystallizer from the mouth of a river, and solidify therein.When at soft contact induction coil, when applying corresponding electric current in constant magnetic field electromagnet and the electromagnetic mixing apparatus respectively, the molten steel at meniscus place will be subjected to the effect of electromagnetic pressure, thereby alleviates the pressure of molten steel to crystallizer wall, is implemented in the purpose of solidifying under the soft contact condition; The molten steel in mold gap zone is subjected to the effect of constant magnetic field, realizes flow regime in the crystallization control device, gets rid of the purpose of field trash; Simultaneously, the molten steel of crystallizer lower area also can correspondingly be subjected to the effect of electromagnetic agitation, quickens MOLTEN STEEL FLOW, improves heat transfer condition.Like this, just make same crystallizer possess multiple function simultaneously, thereby improve the quality of strand effectively.
Claims (5)
1, a kind of crystallizer that includes is at interior combined electromagnetic crystallizer for conticasting, it is characterized in that this crystallizer also includes soft contact induction coil, constant magnetic field electromagnet, electromagnetic stirrer coil, packing material, induction coil is adopted built-in mode, be placed on the inboard meniscus surface area of crystallizer copper wall, use the packing material filling; Full width single bar-type electromagnet is placed on the mold gap zone; Electromagnetic stirrer coil is placed on the lower area of crystallizer near the bottom.
2, combined electromagnetic crystallizer for conticasting according to claim 1 is characterized in that said induction coil being built in crystallizer copper wall inboard, and its built-in mode has two kinds:
A. banded flute profile is made in crystallizer copper wall inboard, induction coil integral body is placed in one, fill with packing material,
B. spiral slot is made in crystallizer copper wall inboard, then coil is placed in one, fill with packing material.
3, combined electromagnetic crystallizer for conticasting according to claim 1 and 2, it is characterized in that said soft contact induction coil is generally 2～6 circles, make of square, garden shape or ellipse garden shape copper pipe, the appearance insulation, the copper pipe diameter is about 6～12MM, coil is a hollow-core construction, and inner water flowing is cooled off, and passes to the alternating current of about 20KHZ to coil.
4, combined electromagnetic crystallizer for conticasting according to claim 1, it is characterized in that the said electric current that feeds to full width wall scroll shape electromagnet is a direct current, voltage must not be higher than safe voltage, and current strength is selected to guarantee that the magnetic induction intensity of magnetic field center section is not less than 0.1T.
5, combined electromagnetic crystallizer for conticasting according to claim 1 is characterized in that passing to the low-frequency ac electric current to the electromagnetic stirrer coil that places the crystallizer lower area, and frequency is 5～10Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001102958A CN1150069C (en) | 2000-04-07 | 2000-04-07 | Combined electromagnetic crystallizer for conticasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001102958A CN1150069C (en) | 2000-04-07 | 2000-04-07 | Combined electromagnetic crystallizer for conticasting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1302703A true CN1302703A (en) | 2001-07-11 |
| CN1150069C CN1150069C (en) | 2004-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001102958A Expired - Fee Related CN1150069C (en) | 2000-04-07 | 2000-04-07 | Combined electromagnetic crystallizer for conticasting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333861C (en) * | 2005-09-13 | 2007-08-29 | 上海大学 | High temperature gradient layer-by-layer solidifying continuously casting process |
| CN100345645C (en) * | 2005-01-12 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for sealing lancing type crystallizer copper pipe using electromagnetic pressure |
| CN100345644C (en) * | 2005-01-12 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for sealing lancing type crystallizer copper pipe using extrusion distortion |
| CN106493329A (en) * | 2016-11-18 | 2017-03-15 | 辽宁科技大学 | A kind of production method of efficient control continuous casting bleed-out and device |
| CN107008873A (en) * | 2017-04-11 | 2017-08-04 | 上海大学 | Multi-mode electrically magnetic field homogenizes the preparation method and its device of metal strand |
| CN109967709A (en) * | 2019-04-24 | 2019-07-05 | 燕山大学 | A kind of combined type coil M-emss |
-
2000
- 2000-04-07 CN CNB001102958A patent/CN1150069C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345645C (en) * | 2005-01-12 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for sealing lancing type crystallizer copper pipe using electromagnetic pressure |
| CN100345644C (en) * | 2005-01-12 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for sealing lancing type crystallizer copper pipe using extrusion distortion |
| CN100333861C (en) * | 2005-09-13 | 2007-08-29 | 上海大学 | High temperature gradient layer-by-layer solidifying continuously casting process |
| CN106493329A (en) * | 2016-11-18 | 2017-03-15 | 辽宁科技大学 | A kind of production method of efficient control continuous casting bleed-out and device |
| CN106493329B (en) * | 2016-11-18 | 2018-06-29 | 辽宁科技大学 | A kind of production method and device of efficient control continuous casting bleed-out |
| CN107008873A (en) * | 2017-04-11 | 2017-08-04 | 上海大学 | Multi-mode electrically magnetic field homogenizes the preparation method and its device of metal strand |
| CN107008873B (en) * | 2017-04-11 | 2020-01-17 | 上海大学 | Method and device for preparing multi-mode electromagnetic field homogenized metal continuous casting billet |
| CN109967709A (en) * | 2019-04-24 | 2019-07-05 | 燕山大学 | A kind of combined type coil M-emss |
| CN109967709B (en) * | 2019-04-24 | 2020-01-03 | 燕山大学 | Combined type coil crystallizer electromagnetic stirrer |
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| Publication number | Publication date |
|---|---|
| CN1150069C (en) | 2004-05-19 |
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