CN109990972B - Continuous casting water test model and method - Google Patents
Continuous casting water test model and method Download PDFInfo
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- CN109990972B CN109990972B CN201910148678.7A CN201910148678A CN109990972B CN 109990972 B CN109990972 B CN 109990972B CN 201910148678 A CN201910148678 A CN 201910148678A CN 109990972 B CN109990972 B CN 109990972B
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Abstract
The invention discloses a continuous casting water test model and a method, wherein the model comprises the following components: the feed inlet of the ladle simulation box is communicated with a storage bin containing magnetic particles, and the liquid inlet of the ladle simulation box is communicated with a medium source; the tundish simulation box is internally provided with a tundish simulation piece, and a feed inlet of the tundish simulation box is communicated with a discharge outlet of the ladle simulation box; the feed inlet of the simulated crystallizer is communicated with the discharge outlet of the tundish simulated box, and a flow control structure is arranged between the feed inlet of the simulated crystallizer and the discharge outlet of the tundish simulated box; at least one of the tundish simulation box and the simulation crystallizer is provided with an electromagnetic coil, and the electromagnetic coil is electrically connected with an external power supply. The continuous casting water test model and the method can be used for a model for comprehensively and continuously measuring the flow field of the high-temperature molten steel so as to simulate a simulation production process, so that a metallurgist can fully understand and master the flow field rule in the continuous casting process.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a continuous casting water test model and a method.
Background
The metallurgy continuous casting process is a process of converting high-temperature liquid molten steel into solid casting blanks, and the flow fields of the molten steel in steel ladles, tundishes and crystallizers have important functions on the quality, the production continuity and the stability of steel products in the continuous casting process. However, the prior art lacks a model which can be used for comprehensively and continuously measuring the flow field of the high-temperature molten steel so as to simulate the simulation production process, and metallurgical workers cannot fully understand and master the flow field law of the molten steel in a steel ladle, a tundish and a crystallizer in the continuous casting process.
Disclosure of Invention
The object of the present invention is to provide a continuous casting water test model and method to at least partially solve the above technical problems, which is achieved by the following technical solution.
The invention provides a continuous casting water test model, which comprises:
the feed inlet of the steel ladle simulation box is communicated with a storage bin containing magnetic particles, and the liquid inlet of the steel ladle simulation box is communicated with a medium source;
the tundish simulation box is internally provided with a tundish simulation piece, and a feed inlet of the tundish simulation box is communicated with a discharge outlet of the ladle simulation box;
the feed inlet of the simulated crystallizer is communicated with the discharge outlet of the tundish simulated box, and a flow control structure is arranged between the feed inlet of the simulated crystallizer and the discharge outlet of the tundish simulated box;
at least one of the tundish simulation box and the simulation crystallizer is provided with an electromagnetic coil, and the electromagnetic coil is electrically connected with an external power supply.
The ladle simulation box, the tundish simulation box and the simulation crystallizer are fixedly connected to the support from top to bottom in sequence.
Further, the ladle simulation box comprises a stirring frame and a stirring body arranged on the stirring frame, wherein the stirring frame is fixedly connected with the support, and the stirring body extends into the accommodating space of the ladle simulation box.
Furthermore, the magnetic particles are nano-scale magnetic particles, a weighing hopper is arranged in the stock bin, the stock bin is communicated with the ladle simulation box through a blanking channel, and a blanking electric vibrator is arranged on the blanking channel.
Furthermore, a sliding plate flow control piece is arranged in the ladle simulation box.
Further, the tundish simulator may include at least one of a dam and a retaining wall.
Furthermore, the flow control structure is a stopper rod, and an argon blowing channel is installed in the stopper rod.
Furthermore, the number of the simulation crystallizers is two, the tundish simulation box is provided with two liquid outlets, and the liquid inlets of the two simulation crystallizers are respectively communicated with the liquid outlets of the tundish simulation box in a one-to-one correspondence manner.
Furthermore, a water outlet is formed in the bottom of the simulation crystallizer, and a flow control valve is arranged at the water outlet.
The invention also provides a continuous casting water test method, which comprises the following steps:
s1: injecting water into the ladle simulation box, weighing a preset amount of nano-scale magnetic particles, adding the nano-scale magnetic particles into the ladle simulation box, starting the stirring body after the water injection reaches the set amount, and uniformly mixing the nano-scale magnetic particles with the water;
s2: controlling a sliding plate flow control piece at the outlet of the ladle simulation box, injecting water into the tundish simulation box, changing the positions of a weir and a retaining wall inside the tundish simulation box to adjust the internal shape of the tundish simulation box, simulating different tundish shapes, observing the floating condition of nano-scale magnetic particles, controlling the electromagnetic force at the rod head of the stopper and the upper part of the submerged nozzle, simulating the nodulation at the stopper and the nodulation at the upper nozzle, and observing the change of a flow field;
s3: injecting water into the two simulated crystallizers through the submerged nozzle by controlling the flow through the stopper rod, controlling the electromagnetic force of different parts of the submerged nozzle, nodulating the models at different parts of the submerged nozzle, and observing the change of a flow field;
s4: the mutual coupling effect of production parameters such as molten steel cleanliness, tundish structure and liquid level, stopper argon flow, pulling speed and the like and the influence on a flow field are simulated by controlling the concentration of nano-scale magnetic particles, the structure and liquid level of a tundish simulation box, the flow rate of argon blown by a stopper and the water outlet speeds of two simulation crystallizers.
The continuous casting water test model and the method provided by the invention can simulate the working conditions of molten steel purity, water gap blockage and the like which affect a flow field, and electromagnetic coils are embedded in the stopper rod head and the whole submerged water gap on the basis of the original common water model, so that the electromagnetic force is controllable and fine-adjustable; simultaneously, mixing nano-scale magnetic particles into water to simulate inclusions in molten steel, simulating the cleanliness of the molten steel by changing the concentration of the nano-scale magnetic particles, gathering the magnetic particles at different positions by controlling and adjusting electromagnetic forces at different positions in a stopper rod head and an immersion nozzle, simulating the generation of inclusion nodules at different positions, and observing the change rule of a flow field; and the nanometer magnetic particles are adsorbed by electromagnetic force, and as the thickness layer increases, the nanometer magnetic particles are bonded into compact magnetic particle groups, the resistance is increased, the process of impact and shedding by the stream can occur, the process is very similar to the process of nodulation of inclusions in molten steel, and the shape of nodulation blockage is naturally formed and continuously changed and is closer to the actual production process. Therefore, the continuous casting water test model and the method can be used for a model for comprehensively and continuously measuring the flow field of the high-temperature molten steel so as to simulate the simulation production process, so that a metallurgical worker can fully understand and master the flow field rule of the molten steel in a steel ladle, a tundish and a crystallizer in the continuous casting process.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic structural diagram of a continuous casting water test model according to an embodiment of the present invention.
Description of reference numerals:
1-ladle simulation box 2-bunker 3-tundish simulation box 4-simulated crystallizer
5-electromagnetic coil 6-support 7-stirring frame 8-stirring body 9-blanking channel
10-stopper rod 11-flow control valve
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a continuous casting water test model according to an embodiment of the present invention.
In a specific embodiment, the continuous casting water test model provided by the invention comprises a ladle simulation box 1, a tundish simulation box 3 and a simulation crystallizer 4; the ladle simulation box 1 is a water tank for simulating a ladle, a feed inlet of the ladle simulation box 1 is communicated with a storage bin 2 containing magnetic particles, a liquid inlet of the ladle simulation box is communicated with a medium source, the medium is water at the moment, the medium source is a water source, and theoretically, the medium can also be other fluid media without being limited to water. A sliding plate flow control piece is arranged in the ladle simulation box 1 so as to adjust the water flow and flow rate according to the requirement.
The tundish simulation box 3 is internally provided with a tundish simulation piece, and the simulated working condition of the tundish simulation box 3 is changed by adjusting and replacing the tundish simulation piece so as to adapt to various different working conditions, wherein the feed inlet of the tundish simulation box 3 is communicated with the discharge outlet of the ladle simulation box 1, and the water of the mixed oil magnetic particles in the ladle simulation box 1 sequentially enters the tundish simulation box 3 through the discharge outlet of the ladle simulation box 1 and the feed inlet of the tundish simulation box 3. The tundish simulation piece can comprise at least one of a blocking weir and a retaining wall, and one or more blocking weirs and retaining walls can be arranged, so that the internal shape of the tundish simulation box 3 can be changed by adjusting the positions of the blocking weirs and/or the retaining walls and the number of the blocking weirs and the retaining walls in the working process, and the simulation of various tundish working conditions can be realized.
The simulation crystallizer 4 is used for simulating a crystallization environment, a feed inlet of the simulation crystallizer 4 is communicated with a discharge outlet of the tundish simulation box 3, a flow control structure is arranged between the feed inlet of the simulation crystallizer 4 and the discharge outlet of the tundish simulation box 3, the flow control structure is a stopper rod 10, and an argon blowing channel is installed in the stopper rod 10 to adjust water flow entering the simulation crystallizer 4. At least one of the tundish simulation box 3 and the simulation crystallizer 4 is provided with an electromagnetic coil 5, and the electromagnetic coil 5 is electrically connected with an external power supply to realize controllable and fine adjustment of electromagnetic force, so that the actual production state is simulated more appropriately.
In order to improve the integration of the equipment, all the parts of the structure are integrated on relatively concentrated working positions, the continuous casting water test model further comprises a support 6, and the ladle simulation box 1, the tundish simulation box 3 and the simulation crystallizer 4 are fixedly connected to the support 6 from top to bottom in sequence so as to provide support for each box body through the support 6. In principle, the support 6 can also be replaced by a support truss or support box.
A stirring device can be arranged in the ladle simulation box 1 to uniformly mix water and magnetic particles. Specifically, the continuous casting water test model further comprises a stirring frame 7 and a stirring body 8 arranged on the stirring frame 7, wherein the stirring frame 7 is fixedly connected to the support 6, and the stirring body 8 extends into the accommodating space of the ladle simulation box 1. The stirring frame 7 can be provided with a motor which is in transmission connection with the stirring body 8 and drives the stirring body 8 to rotate.
Specifically, the magnetic particles are nanoscale magnetic particles, a weighing hopper is arranged in the bin 2, the bin 2 is communicated with the ladle simulation box 1 through a blanking channel 9, a blanking electric vibrator is arranged on the blanking channel 9, the magnetic particles in the bin 2 enter the ladle simulation box 1 through the blanking channel 9, and the blanking electric vibrator is continuously or discontinuously opened to avoid the magnetic particles from remaining in the blanking channel 9.
In order to improve the crystallization simulation capability, the number of the simulation crystallizers 4 is two, the two simulation crystallizers 4 are arranged in parallel, the tundish simulation box 3 is provided with two liquid outlets, the liquid inlets of the two simulation crystallizers 4 are respectively communicated with the liquid outlets of the tundish simulation box 3 in a one-to-one correspondence manner, the bottom of each simulation crystallizer 4 is provided with a water outlet, and each water outlet is provided with a flow control valve 11.
The continuous casting water test model provided by the invention can simulate the working conditions of molten steel purity, water gap blockage and the like which affect a flow field, and on the basis of the original common water model, electromagnetic coils 5 are embedded at the rod head position of the stopper rod 10 and the whole submerged water gap, and the electromagnetic force is controllable and finely adjustable; meanwhile, nanometer magnetic particles are mixed into water to simulate inclusions in molten steel, the cleanliness of the molten steel is simulated by changing the concentration of the nanometer magnetic particles, the magnetic particles are gathered at different positions by controlling electromagnetic forces at different positions in a rod head of the adjusting stopper rod 10 and an immersion nozzle, the inclusions and nodules are simulated at different positions, and the change rule of a flow field is observed; and the nanometer magnetic particles are adsorbed by electromagnetic force, and as the thickness layer increases, the nanometer magnetic particles are bonded into compact magnetic particle groups, the resistance is increased, the process of impact and shedding by the stream can occur, the process is very similar to the process of nodulation of inclusions in molten steel, and the shape of nodulation blockage is naturally formed and continuously changed and is closer to the actual production process. Therefore, the continuous casting water test model and the method can be used for a model for comprehensively and continuously measuring the flow field of the high-temperature molten steel so as to simulate the simulation production process, so that a metallurgical worker can fully understand and master the flow field rule of the molten steel in a steel ladle, a tundish and a crystallizer in the continuous casting process.
In addition to the continuous casting water test model, the invention also provides a continuous casting water test method based on the model, which comprises the following steps:
s1: injecting water into the ladle simulation box, weighing a preset amount of nano-scale magnetic particles, adding the nano-scale magnetic particles into the ladle simulation box, starting the stirring body after the water injection reaches the set amount, and uniformly mixing the nano-scale magnetic particles with the water;
s2: controlling a sliding plate flow control piece at the outlet of the ladle simulation box, injecting water into the tundish simulation box, changing the positions of a weir and a retaining wall inside the tundish simulation box to adjust the internal shape of the tundish simulation box, simulating different tundish shapes, observing the floating condition of nano-scale magnetic particles, controlling the electromagnetic force at the rod head of the stopper and the upper part of the submerged nozzle, simulating the nodulation at the stopper and the nodulation at the upper nozzle, and observing the change of a flow field;
s3: injecting water into the two simulated crystallizers through the submerged nozzle by controlling the flow through the stopper rod, controlling the electromagnetic force of different parts of the submerged nozzle, nodulating the models at different parts of the submerged nozzle, and observing the change of a flow field;
s4: the mutual coupling effect of production parameters such as molten steel cleanliness, tundish structure and liquid level, stopper argon flow, pulling speed and the like and the influence on a flow field are simulated by controlling the concentration of nano-scale magnetic particles, the structure and liquid level of a tundish simulation box, the flow rate of argon blown by a stopper and the water outlet speeds of two simulation crystallizers.
The continuous casting water test method provided by the invention can simulate the working conditions of influence on a flow field such as molten steel purity, water gap blockage and the like, and electromagnetic coils are embedded in the stopper rod head and the whole submerged water gap on the basis of the original common water model, so that the electromagnetic force is controllable and fine-adjustable; simultaneously, mixing nano-scale magnetic particles into water to simulate inclusions in molten steel, simulating the cleanliness of the molten steel by changing the concentration of the nano-scale magnetic particles, gathering the magnetic particles at different positions by controlling and adjusting electromagnetic forces at different positions in a stopper rod head and an immersion nozzle, simulating the generation of inclusion nodules at different positions, and observing the change rule of a flow field; and the nanometer magnetic particles are adsorbed by electromagnetic force, and as the thickness layer increases, the nanometer magnetic particles are bonded into compact magnetic particle groups, the resistance is increased, the process of impact and shedding by the stream can occur, the process is very similar to the process of nodulation of inclusions in molten steel, and the shape of nodulation blockage is naturally formed and continuously changed and is closer to the actual production process. Therefore, the continuous casting water test model and the method can be used for a model for comprehensively and continuously measuring the flow field of the high-temperature molten steel so as to simulate the simulation production process, so that a metallurgical worker can fully understand and master the flow field rule of the molten steel in a steel ladle, a tundish and a crystallizer in the continuous casting process.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (8)
1. A continuous casting water test model, comprising:
the device comprises a steel ladle simulation box (1), wherein a feed inlet of the steel ladle simulation box (1) is communicated with a storage bin (2) containing nano-scale magnetic particles, and a liquid inlet of the steel ladle simulation box is communicated with a medium source;
the tundish simulation box (3), a tundish simulation piece is arranged in the tundish simulation box (3), and a feed inlet of the tundish simulation box (3) is communicated with a discharge outlet of the ladle simulation box (1);
the device comprises a simulation crystallizer (4), wherein a feed inlet of the simulation crystallizer (4) is communicated with a discharge outlet of a tundish simulation box (3), a flow control structure is arranged between the feed inlet of the simulation crystallizer (4) and the discharge outlet of the tundish simulation box (3), the flow control structure is a stopper rod (10), and an argon blowing channel is arranged in the stopper rod (10);
at least one of the tundish simulation box (3) and the simulation crystallizer (4) is provided with an electromagnetic coil (5), and the electromagnetic coil (5) is electrically connected with an external power supply to realize controllable and fine adjustment of electromagnetic force;
the nanometer magnetic particles are mixed in water to simulate inclusions in molten steel, the cleanliness of the molten steel is simulated by changing the concentration of the nanometer magnetic particles, the nanometer magnetic particles are gathered at different positions by controlling and adjusting electromagnetic forces at different positions in a stopper rod (10) rod head and an immersion nozzle, the inclusions and nodules are simulated at different positions, and the change rule of a flow field is observed;
the steel ladle simulation box comprises a support (6), wherein the steel ladle simulation box (1), the tundish simulation box (3) and the simulation crystallizer (4) are fixedly connected to the support (6) from top to bottom in sequence.
2. The continuous casting water test model of claim 1, further comprising a stirring frame (7) and a stirring body (8) mounted on the stirring frame (7), wherein the stirring frame (7) is fixedly connected to the support (6), and the stirring body (8) extends into the accommodating space of the ladle simulation box (1).
3. The continuous casting water test model according to claim 2, characterized in that a weighing hopper is arranged in the stock bin (2), the stock bin (2) is communicated with the ladle simulation box (1) through a blanking channel (9), and a blanking electric vibrator is arranged on the blanking channel (9).
4. The continuous casting water test model according to any one of claims 1 to 3, wherein a slide plate flow control member is provided in the ladle simulation tank (1).
5. The continuous casting water test model of any one of claims 1 to 3, wherein the tundish simulator includes at least one of a dam and a retaining wall.
6. The continuous casting water test model of claim 5, wherein the number of the simulated crystallizers (4) is two, the tundish simulation box (3) is provided with two liquid outlets, and the liquid inlets of the two simulated crystallizers (4) are respectively communicated with the liquid outlets of the tundish simulation box (3) in a one-to-one correspondence manner.
7. The continuous casting water test model of claim 5, characterized in that the bottom of the simulated crystallizer (4) is provided with a water outlet, and a flow control valve (11) is arranged at the water outlet.
8. A continuous casting water test method based on the continuous casting water test model according to any one of claims 1 to 7, characterized by comprising the steps of:
s1: injecting water into the ladle simulation box, weighing a preset amount of nano-scale magnetic particles, adding the nano-scale magnetic particles into the ladle simulation box, starting the stirring body after the water injection reaches the set amount, and uniformly mixing the nano-scale magnetic particles with the water;
s2: controlling a sliding plate flow control piece at the outlet of the ladle simulation box, injecting water into the tundish simulation box, changing the positions of a weir and a retaining wall inside the tundish simulation box to adjust the internal shape of the tundish simulation box, simulating different tundish shapes, observing the floating condition of nano-scale magnetic particles, controlling the electromagnetic force at the rod head of the stopper and the upper part of the submerged nozzle, simulating the nodulation at the stopper and the nodulation at the upper nozzle, and observing the change of a flow field;
s3: injecting water into the two simulated crystallizers through the submerged nozzle by controlling the flow through the stopper rod, controlling the electromagnetic force of different parts of the submerged nozzle, nodulating the models at different parts of the submerged nozzle, and observing the change of a flow field;
s4: the mutual coupling effect of the cleanliness of molten steel, the structure and the liquid level of the tundish, the flow rate of argon blown by the stopper rod and the water outlet speeds of the two simulated crystallizers and the influence on a flow field of the molten steel are simulated by controlling the concentration of nano-scale magnetic particles, the structure and the liquid level of the tundish simulation box, the flow rate of the argon blown by the stopper rod and the water outlet speeds of the two simulated crystallizers.
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| CN201058372Y (en) * | 2007-05-18 | 2008-05-14 | 邯郸钢铁股份有限公司 | Device for controlling flow of ladle |
| CN201819794U (en) * | 2010-09-13 | 2011-05-04 | 浙江工业大学 | Water model experiment platform for slag detection of ladle |
| CN102221447B (en) * | 2011-03-31 | 2012-06-27 | 北京科技大学 | Multifunctional continuous casting water model test device |
| CN102921915A (en) * | 2012-10-23 | 2013-02-13 | 杭州谱诚泰迪实业有限公司 | Slag carry-over detection method and device based on image recognition of vortex on surface of molten steel |
| CN203465080U (en) * | 2013-06-08 | 2014-03-05 | 东北大学 | Continuous casting simulation test device |
| CN103769569A (en) * | 2014-02-17 | 2014-05-07 | 河南省宏达炉业有限公司 | Flow control device and method for continuous casting tundish |
| CN109188320B (en) * | 2018-08-06 | 2020-08-07 | 哈尔滨工业大学 | Flow field imaging system and method based on magnetoresistance effect |
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