CN102357650B - Steel liquid solidification simulator in continuous casting crystallizer - Google Patents
Steel liquid solidification simulator in continuous casting crystallizer Download PDFInfo
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- CN102357650B CN102357650B CN 201110301430 CN201110301430A CN102357650B CN 102357650 B CN102357650 B CN 102357650B CN 201110301430 CN201110301430 CN 201110301430 CN 201110301430 A CN201110301430 A CN 201110301430A CN 102357650 B CN102357650 B CN 102357650B
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Abstract
A steel liquid solidification simulator in a continuous casting crystallizer comprises a machine seat, a steel furnace, a crystallizer, a throwing motor, a vibration motor, a cooling water channel and a data acquisition system. Two lead screws are arranged on the machine seat, one ends of the lead screws are perpendicular to the plane of the machine seat, and the other ends of the lead screws are connected with a motor driving device. A lifting bracket is arranged on the lead screws. The steel furnace is arranged on the machine seat. Both the throwing motor and the vibration motor are arranged on the lifting bracket, the crystallizer is driven by the vibration motor to vertically vibrate, the throwing motor drives a throwing board, and the throwing board is located below the crystallizer. By simulating practical production process of continuous casting, the steel liquid solidification simulator in the continuous casting crystallizer measures heat flux change curves at meniscus positions in the crystallizer under different continuous casting process parameters, obtains a steel liquid solidification shell with characteristics of practical casting blank, and achieves research on initial solidification performance of steel liquid in the crystallizer and influence of the continuous casting process parameters on steel liquid initial solidification performance, and is convenient to operate, low in test cost and suitable for serving as a device for laboratory to research various process conditions of the continuous casting crystallizer.
Description
Technical field
The invention discloses a kind of steel liquid solidification simulator in continuous casting crystallizer, belong to the continuous casting of iron and steel technical field.
Background technology
Crystallizer is the place of molten steel initial solidification, the various mass defects of strand such as dark oscillation mark, wrinkle, transverse crack etc., even bleed-out, and its initial cradle all is the meniscus place at crystallizer.And the factor of molten steel initial solidification behavior that affects the meniscus place is a lot, disturbs each other, wants independently to study certain single factors to the impact of initial solidification behavior, almost is impossible.The continuous casting oscillation mark is technical barrier very common in the production of modern steel continuous casting and that be difficult to overcome, the strand oscillation mark causes face crack usually, seriously also the bleed-out accident can occur, simultaneously it also with other defective, combine such as the Argon Bubble of infiltrating, field trash etc., cause that slab quality further worsens.So in decades, the metallargist has carried out large quantity research for this reason, because the thermokinetics situation of complexity in the continuous cast mold, study various factors is on the still difficult realization of impact of molten steel initial solidification.Existing research method has two kinds, and a kind of is by each factor in the crystallizer is proposed separately, and tests after further simplifying, studying it to the impact of casting process, such as the various device of research covering slag, Mold hydraulic analogy etc.; Another kind is to change a certain or multiple condition, tests the casting machine simulation and produces.Front a kind of method is too single, because the complicated state in the crystallizer, various factors is cross influence often, and a certain factor of single research is little to the directive significance of produced on-site.And test casting machine simulation productive experiment method, in fact the test casting machine is equivalent to a small-sized casting machine, and equipment investment is huge, and each experiment expends above more than 200,000 yuan, domestic at present also only powerful Baosteel come into operation one, be not suitable for use in scientific research.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art and a kind of continuous casting actual production process of can simulating is provided, measure the interior meniscus place of crystallizer changes of heat flux curve under the different casting parameters, acquisition has the steel liquid solidification simulator in continuous casting crystallizer of the solidification of molten steel base shell of actual strand feature.
Steel liquid solidification simulator in continuous casting crystallizer of the present invention, comprise support, converter, crystallizer, throwing motor, vibrating motor, cooling-water duct, data collecting system, described support is provided with two ends perpendicular to the support plane, the first screw mandrel that the other end is connected with motor driver, the second screw mandrel, on described the first screw mandrel, the second screw mandrel, be provided with by described the first screw mandrel, the second screw mandrel and drive the vertically shears of motion; Described converter is arranged on the described support and is between described the first screw mandrel, the second screw mandrel; Described throwing motor, vibrating motor all are arranged on the described shears, be provided with thermocouple and cooling-water duct in the described crystallizer and drive vertically vibration of do by described vibrating motor, described throwing motor-driven one end is connected with the throwing support of a throwing plate, described throwing plate is in described crystallizer below, described thermocouple is electrically connected with described data collecting system, and described cooling-water duct is connected with the peripheral hardware water system.
Among the present invention, described thermocouple is set in parallel in the crystallizer by first row thermocouple and second row thermocouple and consists of; Described first row thermocouple is 1-2mm apart from described crystallizer inwall distance, and described second row thermocouple is 2-4mm apart from first row thermocouple distance; Each heat extraction galvanic couple comprises 2 groups of thermocouples at least, and every group of thermocouple is comprised of 3 thermocouples, and vertically the spacing with 4-6mm is evenly arranged; Distance is 4-6mm between the two adjacent groups thermocouple; The distance of the described crystallizer of thermocouple distance bottom surface placed in the middle is 80-120mm in described every group of thermocouple.
Among the present invention, described motor driver comprises variable-frequency motor and reductor.
Among the present invention, described vibrating motor drives crystallizer by the first reductor, the first eccentric shaft and does vertically vibration, and amplitude and the frequency of described the first eccentric shaft are adjustable, amplitude adjustable range 1-40mm, frequency-tuning range 10-500 beats/min.
Among the present invention, described throwing motor drives described throwing support by the second reductor, the second eccentric shaft and then drives described throwing plate does the vertical direction motion, and the movement velocity of described throwing plate is 0.7-1.5m/min.
The present invention can realize the thermodynamics and dynamics research to meniscus covering slag, initial solidification shell etc. owing to adopt said structure; Can the independent studies technological parameter on the impact of solidification of molten steel behavior, covering slag heat transfer, slab quality etc.; Can study the vibration wave mode, frequency, amplitude of crystallizer to the impact of solidification of molten steel, slab quality; Can study the cooling condition of crystallizer to the impact of solidification of molten steel behavior, slab quality.
Advantage of the present invention is sketched in lower:
1) set up simulation mold oscillation unit: can be optimized research to parameters such as mold oscillation wave mode, frequency, amplitudes;
2) set up simulation strand throwing working cell: realize the simulation to the behavior of strand throwing, to grind the throwing behavior impact of molten steel initial solidification behavior in crystallizer is studied carefully, and the impact of covering slag heat transfer;
3) set up simulation crystallizer cooling system: accurately simulate cooling condition in the crystallizer, change cooling condition to the test of crystallizer hot-fluid impact with the Study of the Realization; And on the impact of solidification of molten steel, slab quality;
4) by the simulation to meniscus place solidification of molten steel behavior in the conticaster crystallizer, can realize the thermodynamics and dynamics research to meniscus covering slag, initial solidification shell etc.;
5) by the different casting parameters of simulation, can the independent studies technological parameter on the impact of solidification of molten steel behavior, covering slag heat transfer, slab quality etc.;
6) by the various vibration parameters of simulation crystallizer, the vibration of research crystallizer is on the impact of solidification of molten steel, slab quality;
7) by the various technological parameters of simulation, the cooling condition of research crystallizer is on the impact of solidification of molten steel behavior, slab quality.
In sum, the present invention is by simulation continuous casting actual production process, measure the changes of heat flux curve at the interior meniscus place of crystallizer under the different casting parameters, acquisition has the solidification of molten steel base shell of actual strand feature, realization is to the research of molten steel initial solidification behavior in crystallizer, and various casting parameters are on the impact of molten steel initial solidification behavior, and by various parameters are optimized, thereby further improve cc billet surface quality, easy to operate, experimentation cost is low, is suitable as the various process conditions of laboratory research continuous cast mold to the equipment of molten steel initial solidification behavioral implications.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is thermocouple arrangement front view in the crystallizer of the present invention.
Accompanying drawing 3 is thermocouple arrangement left view in the crystallizer of the present invention.
Accompanying drawing 4 is the electric thermo-couple temperature curve of the two offset distance copper molds surface diverse location of employing the present invention measurement.
The casting billet surface oscillation mark photo of accompanying drawing 5 for adopting the present invention to obtain.
Among the figure: 1-crystallizer, 2-converter, 5-throwing plate, 6-throwing motor, 7-vibrating motor, 9-data collecting system, 10, the 11-cooling-water duct, 12-thermocouple, 13-support, 14-shears.
According to the thermo-electric couple temperature data that Fig. 4 obtains, can calculate the hot-fluid situation at meniscus place.
According to the simulation casting billet surface oscillation mark that Fig. 5 obtains, can study Heat transfer and the Mechanism of Oscillation Mark Formation of molten steel initial solidification process in the continuous cast mold.
The specific embodiment
Embodiment
Referring to accompanying drawing, steel liquid solidification simulator in continuous casting crystallizer, comprise support 13, converter 2, crystallizer 1, throwing motor 6, vibrating motor 7, cooling system, data collecting system 9, described support 13 is provided with two ends perpendicular to the support plane, the first screw mandrel that the other end is connected with motor driver 8, the second screw mandrel, on described the first screw mandrel, the second screw mandrel, be provided with by described the first screw mandrel, the second screw mandrel and drive the vertically shears 14 of motion; Described converter 2 is arranged on the described support 13 and is between described the first screw mandrel, the second screw mandrel; Described throwing motor 6, vibrating motor 7 all are arranged on the described shears 14, be provided with thermocouple 12 and cooling- water duct 10,11 in the described crystallizer 1 and also drive vertically vibration of do by described vibrating motor 7, described throwing motor 6 drives the throwing support that an end is connected with a throwing plate 5, described throwing plate 5 is in described crystallizer 1 below, described thermocouple 12 is electrically connected with described data collecting system 9, and described cooling- water duct 10,11 is connected with the peripheral hardware water system.
In the present embodiment, described thermocouple is set in parallel in the crystallizer by first row thermocouple and second row thermocouple and consists of; Described first row thermocouple is 1-2mm apart from described crystallizer inwall apart from d, and described second row thermocouple is 2-4mm apart from first row thermocouple distance b; Each heat extraction galvanic couple comprises 2 groups of thermocouples at least, and every group of thermocouple is comprised of 3 thermocouples, and vertically the spacing with 4-6mm is evenly arranged; Be 4-6mm apart from a between the two adjacent groups thermocouple; The distance c of the described crystallizer of thermocouple distance bottom surface placed in the middle is 80-120mm in described every group of thermocouple.
In the present embodiment, described motor driver comprises variable-frequency motor and reductor.
In the present embodiment, described vibrating motor drives crystallizer by the first reductor, the first eccentric shaft and does vertically vibration, and amplitude and the frequency of described the first eccentric shaft are adjustable, amplitude adjustable range 1-40mm, frequency-tuning range 10-500 beats/min.
In the present embodiment, described throwing motor drives described throwing support by the second reductor, the second eccentric shaft and then drives described throwing plate does the vertical direction motion.
Operation principle of the present invention is sketched in lower:
After certain thickness covering slag 4 fusings of molten steel in the converter 23 and covering on it, pass into cooling water in the crystallizer 1, starting device, drive the screw mandrel rotation by motor driver 8, the shears 14 of being located on the screw mandrel is vertically moved downward, the throwing motor 6 on the shears 14 is located in drive, vibrating motor 7 and respectively with throwing motor 6, the throwing plate 5 that vibrating motor 7 links together, crystallizer 1 vertically moves downward, insert in molten steel 3 and covering slag 4 melts, when the length in crystallizer 1 insertion steel and the covering slag melt reaches 80-100mm, motor driver 8 stops action, the vibration frequency that vibrating motor 7 begins to set and amplitude vibration, simultaneously, throwing motor 6 starts, and drives throwing plate 5 with the speed of 1.0m/min, and move distance is 100mm; After 3 seconds, motor driver 8 drives the screw mandrel counter-rotating, driving shears 14 vertically moves upward, throwing plate 5, the crystallizer 1 being located at throwing motor 6 on the shears 14, vibrating motor 7 and linking together with throwing motor 6, vibrating motor 7 respectively vertically move upward, and break away from molten steel 3 and covering slag 4 melts; Be built-up in the solidification of molten steel base shell that the molten steel melt on the throwing plate 5 has formation actual strand feature.In this experimentation, 4 pairs of crystallizer 1 surface heatings of molten steel 3 and covering slag are located at thermocouple 12 real time record crystallizers, 1 surface temperature in the crystallizer 1 and are stored in the data collecting system 9, to calculate crystallizer 1 interior hot-fluid and variations in temperature; The box hat that takes off the experiment gained gives over to subsequent analysis, and experiment finishes.After experiment finishes, the thermo-electric couple temperature data that can record by experiment and box hat external morphology, study various casting parameters to the impact of crystallizer hot-fluid and cc billet surface quality, these technological parameters comprise: Oscilation Parameters of Mold, crystallizer coating, crystallizer cooling parameter, casting speed etc.
Claims (4)
1. steel liquid solidification simulator in continuous casting crystallizer, comprise support, converter, crystallizer, throwing motor, vibrating motor, cooling-water duct, data collecting system, it is characterized in that: described support is provided with two ends perpendicular to the support plane, the first screw mandrel that the other end is connected with motor driver, the second screw mandrel, on described the first screw mandrel, the second screw mandrel, be provided with by described the first screw mandrel, the second screw mandrel and drive the vertically shears of motion; Described converter is arranged on the described support and is between described the first screw mandrel, the second screw mandrel; Described throwing motor, vibrating motor all are arranged on the described shears, be provided with thermocouple and cooling-water duct in the described crystallizer and drive vertically vibration of do by described vibrating motor, described throwing motor-driven one end is connected with the throwing support of a throwing plate, described throwing plate is in described crystallizer below, described thermocouple is electrically connected with described data collecting system, and described cooling-water duct is connected with the peripheral hardware water system; Described thermocouple is set in parallel in the crystallizer by first row thermocouple and second row thermocouple and consists of; Described first row thermocouple is 1-2mm apart from described crystallizer inwall distance, and described second row thermocouple is 2-4mm apart from first row thermocouple distance; Each heat extraction galvanic couple comprises 2 groups of thermocouples at least, and every group of thermocouple is comprised of 3 thermocouples, and vertically the spacing with 4-6mm is evenly arranged; Distance is 4-6mm between the two adjacent groups thermocouple; The distance of the described crystallizer of thermocouple distance bottom surface placed in the middle is 80-120mm in described every group of thermocouple.
2. steel liquid solidification simulator in continuous casting crystallizer according to claim 1, it is characterized in that: described motor driver comprises variable-frequency motor and reductor.
3. steel liquid solidification simulator in continuous casting crystallizer according to claim 2, it is characterized in that: described vibrating motor drives crystallizer by the first reductor, the first eccentric shaft and does vertically vibration, amplitude and the frequency of described the first eccentric shaft are adjustable, amplitude adjustable range 1-40mm, frequency-tuning range 10-500 beats/min.
4. the described steel liquid solidification simulator in continuous casting crystallizer of any one according to claim 1-3, it is characterized in that: described throwing motor drives described throwing support by the second reductor, the second eccentric shaft and then drives described throwing plate does the vertical direction motion, and the movement velocity of described throwing plate is 0.7-1.5m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110301430 CN102357650B (en) | 2011-09-28 | 2011-09-28 | Steel liquid solidification simulator in continuous casting crystallizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110301430 CN102357650B (en) | 2011-09-28 | 2011-09-28 | Steel liquid solidification simulator in continuous casting crystallizer |
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| CN102357650A CN102357650A (en) | 2012-02-22 |
| CN102357650B true CN102357650B (en) | 2013-04-17 |
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| CN104266899B (en) * | 2014-10-09 | 2016-09-28 | 中南大学 | In a kind of continuous cast mold, initial solidification checking stricture of vagina forms analog and method |
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| CN107020358B (en) * | 2017-06-13 | 2022-07-01 | 北京科技大学 | Device for simulating solidification structure and unsteady state heat flow of casting blank surface layer in crystallizer |
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| EP0594961A1 (en) * | 1992-10-12 | 1994-05-04 | Toyota Jidosha Kabushiki Kaisha | Estimation of metal temperature by consumption amount of pouring tube due to immersion in molten metal |
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