CN101185956A - Metal continuous casting crystallizer composite apparatus capable of controlling initial solidification - Google Patents
Metal continuous casting crystallizer composite apparatus capable of controlling initial solidification Download PDFInfo
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- CN101185956A CN101185956A CNA2007101718103A CN200710171810A CN101185956A CN 101185956 A CN101185956 A CN 101185956A CN A2007101718103 A CNA2007101718103 A CN A2007101718103A CN 200710171810 A CN200710171810 A CN 200710171810A CN 101185956 A CN101185956 A CN 101185956A
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Abstract
The invention discloses a metal continuous casting crystallizer compound device which can control an initial solidification, belonging to the metal continuous casting technique field. The invention has an improvement on the basis of the original crystallizer so as to better control the growth of the initial solidification shell to get a shell with better quality. The invention is characterized in that a heating induction coil is arranged to heat the metal liquid and protective slag neighboring a crystal meniscus so as to enhance the microcosmic organization structure of the solidification shell and the lubrication effect between the shell and the crystallizer and further reduce the shell defect and enhance the strength of the initial solidification shell, which is also good for the enhancement of the continuous casting efficiency. The structure of the invention comprises a heating coil (1), a crystallizer (2), a cooling water shell (3), a vibration device (4), a shell (5), a metal liquid tundish (6), a submerged nozzle (7), protective slag (8), metal liquid (9) and a dummy bar (10). The device has a simple structure and is easy for operation, which is convenient for realizing industrialized application.
Description
Technical field
The present invention relates to a kind of metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification, belong to metal continuous cast technology field.
Background technology
In the casting process of metal, near molten metal initial solidification the meniscus in crystallizer has fundamental influence for the quality of base shell.The surface quality of continuous casting billet depends primarily on the heat-transfer intensity and the uniformity at the uniformity that initial solidification shell solidifies in the crystallizer, contiguous meniscus place, and many defectives of base shell as oscillation mark, segregation, crackle and slag inclusion etc., all have important relationship with initial solidification.
Casting process comes down to a strong cold process of setting, the heat transfer at crystallizer meniscus place is the strongest in this process, this strong cold mode tends to bring negative effect to the initial solidification of base shell, crack, defective such as segregation, influence the quality of base shell, studies show that and adopt weak cold mode to help preventing these generation of defects, improve base chitin amount; In addition, the fluctuation of the free surface that causes owing to the vibration of crystallizer produces very important influence to the initial solidification zone, and crisis is to the heat transfer of base shell and the stability of solidifying.
In order to produce high-quality base shell to satisfy the demand of modern industry, people had carried out a large amount of theories and experimental study to the initial solidification in the casting process in recent years, some continuous casting technologies have been developed at initial solidification, such as the soft-contact electromagnetic continuous casting technology, this technology is the meniscus shape at utilization electromagnetic field control initial solidification point place, and meniscus curvature is diminished; Widen the passage of molten mold flux simultaneously, made contacting of liquid metal and crystallizer press and reduce for a short time, realized soft contact the between liquid metal and the crystallizer, improved lubricant effect.Soft contact mould miscellaneous and composed mold have been developed according to this technology people, but their structure is more complicated often, and owing to introduced electromagnetic field, should use also relatively more difficult, therefore it is simpler to be necessary to develop a kind of structure, uses convenient composed mold to improve the initial solidification situation of base shell.The present invention is in conjunction with the own characteristic of crystallizer, and it is simply improved and perfect, reduces the negative effect that it produced as far as possible, so that control the growth of initial solidification base shell better, obtains better base chitin amount, starting point of the present invention that Here it is.
Summary of the invention
The objective of the invention is in the metal continuous cast process; heterogeneous microstructure that improves initial solidification base shell by near molten metal induction coil heating crystallizer meniscus and covering slag and the lubricant effect between base shell and the crystallizer; thereby reduce base shell defective; improve the intensity of initial solidification base shell; reduce the frictional force between base shell and the crystallizer wall; reduce the probability of bleedout in the casting process, improve base chitin amount and production efficiency.
In order to achieve the above object, the present invention improves on the basis of original metal continuous casting crystallizer device, has designed a kind of metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification.
The present invention relates to a kind of metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification, include heater coil, crystallizer, cooling water housing, vibrating device, base shell, molten metal tundish, submersed nozzle, covering slag, molten metal and dummy bar; It is characterized in that: main body crystallizer and heater coil are used, and near the inboard top of lunar surface of producing of crystallizer is placed and be wound in to heater coil, to feed alternating current heating initial solidification zone; Described heater coil is 1～50 circle, is shaped as rectangular, pros or circular, decides on the shape of crystallizer; Coil is made by square, ellipse or circular copper pipe, and the copper pipe equivalent diameter is 3～50mm, exterior insulation, inner water flowing cooling; Crystallizer center top is provided with a molten metal tundish, is connected to submersed nozzle below it; The arranged outside of crystallizer has the cooling water housing of the fed cooling water that is surrounded on them; Below housing, be provided with vibrating device; Bottom at crystallizer is provided with dummy bar; Molten metal in the crystallizer goes out with the dummy bar drawing together through cooled and solidified and with the base shell of initial solidification, finally obtains the metal strand.
Described heater coil is positioned over 5～100mm place, crystallizer free surface top.
Described molten metal includes any of molten metals such as steel, aluminium, magnesium, alloy.
Be formed with one deck covering slag between base shell that described initial solidification forms and the crystallizer wall.
The design feature and the action principle of apparatus of the present invention are as described below:
Near the top of apparatus of the present invention inboard meniscus of crystallizer is provided with a heat induced coil, make it in casting process, carry out eddy-current heating to initial solidification point near zone, thereby change this regional hot-fluid size and Orientation, make it in casting process, carry out eddy-current heating to initial solidification point near zone, thereby change this regional hot-fluid size and Orientation, reduce the thermograde in initial solidification point zone on the one hand, cold a little less than making this regional heat transfer type by original strong cold becoming, it is more even to conduct heat, and can prevent generation of defects such as crackle, segregation like this; Simultaneously, because the temperature in initial solidification zone raises, make the position of initial solidification point move down, Free Surface away from molten metal, so not only can reduce the influence (to the influence of mass transfer) of the fluctuation of free surface, and can reduce temperature fluctuation that the vibration owing to crystallizer produces influence (to the influence of conducting heat) initial solidification to initial solidification; Its three microstructure that can improve initial solidification base shell, because the variation of direction of heat flow, the dendrite direction is changed, promptly by original perpendicular to crystallizer wall having a certain degree till now with crystallizer wall, can strengthen base shell opposing crystallizer wall friction intensity of force like this, thereby help carrying out smoothly of throwing; In addition; place the induction coil at crystallizer top not only near the molten metal the meniscus to be heated, also this locality protection slag has been produced heat effect simultaneously, so just eliminated the slagging scorification phenomenon; make that covering slag is easier to enter the slag road, thereby improved lubricated between base shell and the crystallizer.
In summary it can be seen, the invention has the advantages that the structure to original crystallizer improves a little, utilize the heater coil on its top both to reduce metal base shell generation of defects, improved initial solidification base shell performance, solved slagging scorification problem in the crystallizer again, strengthened process of billet withdrawal lubricated, smooth, helped producing the high-quality strand and improve continuous casting productivity ratio; Simultaneously, apparatus structure is simple, and processing ease is easy to realize industrial applications.
Description of drawings
Fig. 1 is the structural representation of metal continuous casting crystallizer composite apparatus of the present invention.
The local enlarged diagram of half device that Fig. 2 cuts open along center line for Fig. 1.
The specific embodiment
After now the concrete structure of metal continuous casting crystallizer composite apparatus of the present invention further being described in.
Referring to Fig. 1 and Fig. 2, this device includes heater coil 1, crystallizer 2, cooling water housing 3, vibrating device 4, base shell 5, molten metal tundish 6, submersed nozzle 7, covering slag 8, molten metal 9 and dummy bar 10; Main body crystallizer 2 is used with heat induced coil 1, above heat induced coil 1 is placed and be wound near the crystallizer 2 inboard meniscus, to feed alternating current heating initial solidification zone; Described heater coil is 40 circles, is shaped as circle; Coil 1 is made by circular copper pipe, and the copper pipe equivalent diameter is 14mm, outside coated insulation material, but water flowing is cooled off in the hollow copper tubing; Crystallizer 2 centers tops is provided with a molten metal tundish 6, and this molten metal is a molten steel, is connected with a submersed nozzle 7 below the tundish 6; The arranged outside of crystallizer 2 has the cooling water housing 3 of the fed cooling water that is surrounded on it; Below this housing 3, be provided with vibrating device, so that the smooth demoulding of base shell; Be provided with dummy bar 10 in the bottom of crystallizer 2; Molten steel 9 in the crystallizer 2 goes out with dummy bar 10 drawings together through cooled and solidified and with the shell base 5 of initial solidification, finally obtains the steel strand.
Be formed with one deck covering slag 8 between base shell 5 that above-mentioned initial solidification forms and crystallizer 2 walls, the oxidation that prevents air can be played in this layer covering slag 8 molten steel surface in crystallizer, can play lubrication at the crystallizer wall and make and be easy to the demoulding.
Claims (3)
1. the metal continuous casting crystallizer composite apparatus of a controlled controlling initial solidification includes heater coil (1), crystallizer (2), cooling water housing (3), vibrating device (4), base shell (5), molten metal tundish (6), submersed nozzle (7), covering slag (8), molten metal (9) and dummy bar (10); It is characterized in that: main this crystallizer (2) is used with heater coil (1), and near the inboard top of lunar surface of producing of crystallizer (2) is placed and be wound in to heater coil (1), to feed alternating current heating initial solidification zone; Described heater coil is 1～50 circle, is shaped as rectangular, pros or circular, decides on the shape of crystallizer; Coil is made by square, ellipse or circular copper pipe, and the copper pipe equivalent diameter is 3～50mm, exterior insulation, inner water flowing cooling; Crystallizer (2) center top is provided with a molten metal tundish (6), is connected to submersed nozzle (7) below it; The arranged outside of crystallizer (2) has the cooling water housing (3) of the fed cooling water that is surrounded on them; Below housing (3), be provided with vibrating device (4); Be provided with dummy bar (10) in the bottom of crystallizer (2); Molten metal (9) in the crystallizer (2) goes out with dummy bar (10) drawing together through cooled and solidified and with the base shell (5) of initial solidification, finally obtains the metal strand.
2. a kind of metal continuous casting crystallizer composite apparatus that initialization is solidified of controlling as claimed in claim 1 is characterized in that described heater coil (1) is positioned over 5～100mm place, crystallizer (2) free surface top.
3. a kind of metal continuous casting crystallizer composite apparatus that initialization is solidified of controlling as claimed in claim 1 is characterized in that described molten metal includes any of molten metals such as steel, aluminium, magnesium, alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101718103A CN100566886C (en) | 2007-12-06 | 2007-12-06 | The metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101718103A CN100566886C (en) | 2007-12-06 | 2007-12-06 | The metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification |
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| Publication Number | Publication Date |
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| CN101185956A true CN101185956A (en) | 2008-05-28 |
| CN100566886C CN100566886C (en) | 2009-12-09 |
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| CNB2007101718103A Active CN100566886C (en) | 2007-12-06 | 2007-12-06 | The metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266899A (en) * | 2014-10-09 | 2015-01-07 | 中南大学 | Device and method for simulating crack formation of initial solidified blank in continuous casting crystallizer |
| CN110116193A (en) * | 2019-05-06 | 2019-08-13 | 中南大学 | A kind of round mold and continuous casting installation for casting, continuous cast round billets oscillation mark suppressing method |
| CN110125346A (en) * | 2019-05-06 | 2019-08-16 | 江西理工大学 | A kind of plate slab crystallizer and continuous casting installation for casting, continuous casting steel billet oscillation mark suppressing method |
| US10478890B1 (en) | 2016-06-21 | 2019-11-19 | Nucor Corporation | Methods of billet casting |
| CN115283631A (en) * | 2022-09-01 | 2022-11-04 | 一重集团大连工程技术有限公司 | Insulated feeder head device and control method thereof |
-
2007
- 2007-12-06 CN CNB2007101718103A patent/CN100566886C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266899A (en) * | 2014-10-09 | 2015-01-07 | 中南大学 | Device and method for simulating crack formation of initial solidified blank in continuous casting crystallizer |
| US10478890B1 (en) | 2016-06-21 | 2019-11-19 | Nucor Corporation | Methods of billet casting |
| US11148192B2 (en) | 2016-06-21 | 2021-10-19 | Nucor Corporation | Shroud for billet casting |
| CN110116193A (en) * | 2019-05-06 | 2019-08-13 | 中南大学 | A kind of round mold and continuous casting installation for casting, continuous cast round billets oscillation mark suppressing method |
| CN110125346A (en) * | 2019-05-06 | 2019-08-16 | 江西理工大学 | A kind of plate slab crystallizer and continuous casting installation for casting, continuous casting steel billet oscillation mark suppressing method |
| CN115283631A (en) * | 2022-09-01 | 2022-11-04 | 一重集团大连工程技术有限公司 | Insulated feeder head device and control method thereof |
| CN115283631B (en) * | 2022-09-01 | 2023-08-01 | 一重集团大连工程技术有限公司 | Thermal insulation riser device and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN100566886C (en) | 2009-12-09 |
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Owner name: STATE GRID SHANGHAI ELECTRIC POWER COMPANY Effective date: 20141115 |
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Effective date of registration: 20141115 Address after: 200444 Baoshan District Road, Shanghai, No. 99 Patentee after: Shanghai University Patentee after: State Grid Shanghai Municipal Electric Power Company Address before: 200444 Baoshan District Road, Shanghai, No. 99 Patentee before: Shanghai University |