A continuous casting tundish, a continuous casting control method, and related equipment

Abstract

The application discloses a continuous casting tundish, a continuous casting control method and related equipment, and relates to the technical field of steelmaking and continuous casting, and mainly aims to solve the problem of high large-size inclusion defect rate on the surface of a plate coil caused by poor removal effect of large-size inclusions in the continuous casting process in the prior art. The continuous casting tundish comprises a first gas curtain baffle part arranged in the tundish, a second gas curtain baffle part arranged in the tundish, and a gas inlet part communicated with the tundish, wherein the first gas curtain baffle part and the second gas curtain baffle part cover a gas inlet of the gas inlet part; a liquid inlet part is communicated with the tundish; and the blowing hole diameter of the first gas curtain baffle part is different from the blowing hole diameter of the second gas curtain baffle part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steelmaking continuous casting, and in particular to a continuous casting tundish, a continuous casting control method and related equipment. BACKGROUND

[0002] At present, surface quality defects of high-end plates are important factors affecting plate yield, especially for high-end cold-rolled plates such as automobile plates, tin-plated plates, and home appliance plates. Surface defects caused by large-size slag inclusions and inclusions in the steelmaking billet account for 30%-60% of total surface defects. Since the occurrence of large-size inclusions is occasional, how to eliminate surface defects caused by large-size inclusions has been a technical difficulty in the process of high-end plate smelting. However, in the prior art, the continuous casting tundish and the continuous casting method used to solve the above problems have poor removal effect on large-size inclusions, resulting in high large-size inclusion defect rate of plate coils. SUMMARY

[0003] Embodiments of the present application provide a continuous casting tundish, a continuous casting control method and related equipment.

[0004] In a first aspect, the present application provides a continuous casting tundish, comprising:

[0005] A first gas curtain retaining wall part is arranged in the tundish.

[0006] A second gas curtain retaining wall part is arranged in the tundish.

[0007] An air inlet part is connected to the tundish, and the first gas curtain retaining wall part and the second gas curtain retaining wall part cover the air inlet of the air inlet part.

[0008] A liquid inlet part is connected to the tundish.

[0009] The gas blowing aperture of the first gas curtain retaining wall part is different from the gas blowing aperture of the second gas curtain retaining wall part.

[0010] In some embodiments, the first gas curtain retaining wall part is arranged around the liquid inlet part.

[0011] The second gas curtain retaining wall part is arranged around the first gas curtain retaining wall part.

[0012] There is a gap between the first gas curtain retaining wall part and the second gas curtain retaining wall part.

[0013] In some embodiments, the air inlet part comprises:

[0014] A first air inlet pipe, and the first gas curtain retaining wall part covers the air inlet of the first air inlet pipe.

[0015] A second air inlet pipe, and the second gas curtain retaining wall part covers the air inlet of the second air inlet pipe.

[0016] In some embodiments, the gas curtain barrier part is made of a dispersed type of gas-permeable refractory material; and / or

[0017] The first gas curtain barrier part is annular, the inner diameter of the first gas curtain barrier part is greater than or equal to 120 mm and less than or equal to 140 mm, the outer diameter of the first gas curtain barrier part is greater than or equal to 160 mm and less than or equal to 180 mm, and the width is greater than or equal to 30 mm and less than or equal to 40 mm,

[0018] The second gas curtain barrier part is annular, the inner diameter of the second gas curtain barrier part is greater than or equal to 160 mm and less than or equal to 180 mm, the outer diameter of the second gas curtain barrier part is greater than or equal to 190 mm and less than or equal to 210 mm, and the width is greater than or equal to 20 mm and less than or equal to 30 mm; and / or

[0019] The blowing hole diameter of the first gas curtain barrier part is greater than or equal to 0.08 mm and less than or equal to 0.15 mm; and / or

[0020] The blowing hole diameter of the second gas curtain barrier part is greater than or equal to 0.20 mm and less than or equal to 0.50 mm.

[0021] In some embodiments, when the first gas curtain barrier part and the second gas curtain barrier part are both annular, the gap is the radial distance between the inner diameter of the second gas curtain barrier part and the outer diameter of the first gas curtain barrier part, and the gap is greater than or equal to 10 mm and less than or equal to 20 mm.

[0022] In a second aspect, the application provides a continuous casting control method for controlling the continuous casting tundish of any one of the first aspect, the method comprising:

[0023] Controlling the gas to flow into the gas inlet part to make the gas form bubbles of different sizes through the first gas curtain barrier part and the second gas curtain barrier part;

[0024] Controlling the steel liquid to flow into the tundish through the liquid inlet.

[0025] In some embodiments, the gas flow rate of the first gas curtain barrier part is a first flow rate, the gas flow rate of the second gas curtain barrier part is a second flow rate, and when the blowing hole diameter of the first gas curtain barrier part is smaller than the blowing hole diameter of the second gas curtain barrier part, the first flow rate is smaller than the second flow rate.

[0026] In a third aspect, the application provides a continuous casting control device, comprising:

[0027] The first control unit is configured to control the gas to flow into the air inlet, so that the gas forms bubbles of different sizes through the first air curtain barrier and the second air curtain barrier.

[0028] The second control unit is configured to control the molten steel to be injected into the tundish through the liquid inlet.

[0029] To achieve the above-mentioned purpose, the fourth aspect of the embodiment of the present application provides a storage medium, the storage medium comprising a stored program, wherein the program is executed by a processor to implement the continuous casting control method of any one of the second aspect.

[0030] To achieve the above-mentioned purpose, the fifth aspect of the embodiment of the present application provides a device, the device comprising at least one processor and at least one memory connected to the processor; wherein the processor is configured to call program instructions in the memory, and execute the continuous casting control method of any one of the second aspect.

[0031] Through the above technical solution, the continuous casting tundish, the continuous casting control method and the related device provided by the present application generate bubbles of different sizes by setting the first air curtain barrier and the second air curtain barrier, and setting the gas blowing hole diameter of the first air curtain barrier and the gas blowing hole diameter of the second air curtain barrier to be different in size, wherein the relatively larger bubbles are beneficial to stirring the molten steel, and at the same time, the flow field near the stopper is disturbed, avoiding the formation of high-speed laminar flow during the flow of the molten steel into the nozzle; the relatively smaller bubbles increase the collision opportunity with the metal inclusions in the molten steel due to the small upward velocity, thereby increasing the probability of the growth and upward floating of the inclusions, thereby realizing the capture and removal of large inclusions, and thereby achieving the effect of reducing the large inclusion defect rate on the surface of the coil, and thereby improving the quality of the finished product. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present description. Moreover, the same reference numerals are used throughout the various drawings to represent similar or same components. In the drawings:

[0033] Figure 1 A composition schematic block diagram of a continuous casting tundish provided by the embodiment of the present application;

[0034] Figure 2 A flowchart of a continuous casting control method provided by the embodiment of the present application;

[0035] Figure 3 A composition schematic block diagram of a continuous casting control device provided by the embodiment of the present application;

[0036] Figure 4 A schematic block diagram of a device provided in an embodiment of the present application.

[0037] wherein, Figure 1 The correspondence between the reference signs and the component names in the drawings is as follows:

[0038] 001 first gas curtain baffle part; 002 gap; 003 second gas curtain baffle part; 004 air inlet part; 005 liquid inlet. DETAILED DESCRIPTION

[0039] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms, if any, does not limit the scope of the embodiments described herein, which are capable of other sequences and / or orders than those explicitly described herein. Furthermore, the terms "comprise" and "include", and their conjugates, do not exclude the presence of other elements or steps than those listed. The terms "a", "an" and "the" preceding an element do not exclude the presence of more than one of the element in the process, method, system, product or apparatus. Further, the description herein of any embodiments, including preferred embodiments, is illustrative and is not restrictive in character, unless expressly stated otherwise. The terms "about" and "substantially" used in the description and claims of the present application, if any, are used to describe and account for small fluctuations, such as due to manufacturing tolerances, deviations in measurement, and the like.

[0040] Therefore, in order to solve the problem of the poor removal effect of large-size inclusions in the continuous casting process, which leads to a high rate of large inclusion defects on the surface of the plate coil, an embodiment of the present application provides a continuous casting tundish, as shown in the drawings, comprising: a first gas curtain baffle part 001 arranged in the tundish; Figure 1

[0041] a second gas curtain baffle part 003 arranged in the tundish;

[0042] an air inlet part 004 connected to the tundish, the air inlet of the air inlet part being covered by the first gas curtain baffle part 001 and the second gas curtain baffle part 003;

[0043] a liquid inlet 005 connected to the tundish;

[0044] wherein the blowhole diameter of the first gas curtain baffle part is different from the blowhole diameter of the second gas curtain baffle part.

[0045] ​The first gas curtain barrier part 001 and the second gas curtain barrier part 003 can be arranged on the tundish bottom nozzle, and the first gas curtain barrier part 001 and the second gas curtain barrier part 003 can be made of diffusible refractory material. The gas inlet part 004 is used for inputting gas, and the input gas can be argon. The liquid inlet 005 is used for guiding the liquid in the tundish into the crystallizer. The blowing hole diameter of the first gas curtain barrier part is different from the blowing hole diameter of the second gas curtain barrier part, and is used for generating bubbles of different sizes.

[0046] By the technical scheme, the tundish is provided, the first gas curtain barrier part 001 and the second gas curtain barrier part 003 are arranged, the blowing hole diameter of the first gas curtain barrier part is different from the blowing hole diameter of the second gas curtain barrier part, and bubbles of different sizes are generated at the same time, wherein the relatively large bubbles are beneficial to stirring the liquid steel, and at the same time, the flow field near the stopper is disturbed, so that the high-speed laminar flow is avoided in the process of the steel flow to the inside of the nozzle; the relatively small bubbles have small up-floating speed, so that the collision opportunity with the metal inclusions in the liquid steel is increased, and the probability of the inclusions growing and floating is increased, so that the large inclusions are captured and removed, and the effect of reducing the large inclusion defect rate on the plate surface is achieved, and the quality of the finished product is improved.

[0047] As shown in Figure 1 In some embodiments, the first gas curtain barrier part 001 is arranged around the liquid inlet 005;

[0048] The second gas curtain barrier part 003 is arranged around the first gas curtain barrier part 001;

[0049] The first gas curtain barrier part 001 and the second gas curtain barrier part 003 have a gap 002 therebetween.

[0050] For example, the gap 002 is used for preventing the bubbles generated by the first gas curtain barrier part 001 from mixing with the bubbles generated by the second gas curtain barrier part 003. By arranging the first gas curtain barrier part 001 around the liquid inlet 005 and arranging the second gas curtain barrier part 003 around the first gas curtain barrier part 001, the gap 002 can effectively achieve the effect of generating two kinds of bubbles of different sizes at the same time, and the effect of removing the inclusions in the liquid steel is achieved. At the same time, the gap 002 effectively avoids the mixing of the two kinds of bubbles.

[0051] In some embodiments, the gas inlet part 004 includes:

[0052] The first gas curtain barrier part covers the gas inlet of the first gas inlet pipe;

[0053] The second gas curtain barrier part covers the gas inlet of the second gas inlet pipe.

[0054] Exemplarily, the first gas inlet pipe is used for inputting the gas required for generating the bubbles of the first gas curtain barrier 001. The second gas inlet pipe is used for inputting the gas required for generating the bubbles of the second gas curtain barrier 003. By respectively arranging different gas inlet pipes, the flow of the gas of the first gas curtain barrier 001 and the second gas curtain barrier 003 can be respectively controlled, thereby achieving the effect of assisting the first gas curtain barrier 001 and the second gas curtain barrier 003 to generate different bubbles, and thereby ensuring that the large-size inclusions in the continuous casting process can be removed by using bubbles of different sizes at the same time.

[0055] In some embodiments, the gas curtain barrier is made of a dispersed gas-permeable refractory material; and / or

[0056] The first gas curtain barrier 001 is annular, the inner diameter of the first gas curtain barrier 001 is greater than or equal to 120 mm and less than or equal to 140 mm, the outer diameter of the first gas curtain barrier 001 is greater than or equal to 160 mm and less than or equal to 180 mm, and the width of the first gas curtain barrier 001 is greater than or equal to 30 mm and less than or equal to 40 mm,

[0057] The second gas curtain barrier 003 is annular, the inner diameter of the second gas curtain barrier 003 is greater than or equal to 160 mm and less than or equal to 180 mm, the outer diameter of the second gas curtain barrier 003 is greater than or equal to 190 mm and less than or equal to 210 mm, and the width of the second gas curtain barrier 003 is greater than or equal to 20 mm and less than or equal to 30 mm; and / or

[0058] The gas blowing hole diameter of the first gas curtain barrier 001 is greater than or equal to 0.08 mm and less than or equal to 0.15 mm; and / or

[0059] The gas blowing hole diameter of the second gas curtain barrier 003 is greater than or equal to 0.20 mm and less than or equal to 0.50 mm.

[0060] The above parameters are obtained by a large number of simulation experiments and production application test verification by a person skilled in the art. For example, the first gas curtain baffle part 001 and the second gas curtain baffle part 003 can be annular. The inner diameter of the first gas curtain baffle part 001 can be 130 mm, the outer diameter of the first gas curtain baffle part 001 can be 160 mm, the width can be 30 mm, and the blowing hole diameter of the first gas curtain baffle part 001 is 0.12 mm. The inner diameter of the second gas curtain baffle part 003 can be 170 mm, the outer diameter of the second gas curtain baffle part 003 can be 200 mm, the width can be 30 mm, and the blowing hole diameter of the second gas curtain baffle part 003 is 0.45 mm. By setting the above parameters of the continuous casting tundish, the first gas curtain baffle part 001 generates small bubbles, and the second gas curtain baffle part 003 generates large bubbles. The small bubbles are used to increase the collision opportunity with the metal inclusions in the molten steel, thereby increasing the probability of the inclusions growing and floating, so as to achieve the capture and removal of large inclusions. The large bubbles are used to disrupt the flow field near the stopper, so as to avoid the formation of high-speed laminar flow during the process of the molten steel flowing into the nozzle. Then, by simultaneously using the small bubbles and the large bubbles, the effect of reducing the large inclusion defect rate on the plate surface is achieved, thereby improving the quality of the finished product.

[0061] In some embodiments, when the first gas curtain baffle part 001 and the second gas curtain baffle part 003 are annular, the gap 002 is the radial distance between the inner diameter of the second gas curtain baffle part 003 and the outer diameter of the first gas curtain baffle part 001. The gap 002 is greater than or equal to 10 mm and less than or equal to 20 mm.

[0062] The above parameters are obtained by a large number of simulation experiments and production application test verification by a person skilled in the art. For example, the gap 002 can be 10 mm. By setting the gap of the continuous casting tundish, the mixing of the bubbles generated by the first gas curtain baffle part 001 and the second gas curtain baffle part 003 is effectively prevented, thereby ensuring that the small bubbles generated by the first gas curtain baffle part 001 can continuously capture and remove large inclusions, and the large bubbles can continuously disrupt the flow field near the stopper, so as to avoid the formation of high-speed laminar flow during the process of the molten steel flowing into the nozzle, thereby reducing the large inclusion defect rate on the plate surface.

[0063] As shown in Figure 2 The second aspect of the embodiment of the application provides a continuous casting control method for controlling the continuous casting tundish according to any one of claims 1 to 5. The method comprises:

[0064] controlling the gas to flow into the gas inlet part 004, so that the gas forms bubbles of different sizes through the first gas curtain baffle part 001 and the second gas curtain baffle part 003;

[0065] The liquid inlet 005 is used to control the pouring of liquid steel into the tundish.

[0066] For example, the gas flow rate of the gas inlet 004 can be controlled according to different casting periods. For example, the gas flow rate of the gas blowing hole of the first gas curtain wall 001 can be controlled to be 10-20 NL / min, and the gas flow rate of the gas blowing hole of the second gas curtain wall 003 can be controlled to be 30-40 NL / min within 0-2 min before the start of casting. The gas flow rate of the gas blowing hole of the first gas curtain wall 001 can be controlled to be 20-30 NL / min, and the gas flow rate of the gas blowing hole of the second gas curtain wall 003 can be controlled to be 50-60 NL / min after 2-4 min of casting. The gas flow rate of the gas blowing hole of the first gas curtain wall 001 can be controlled to be 10-20 NL / min, and the gas flow rate of the gas blowing hole of the second gas curtain wall 003 can be controlled to be 30-40 NL / min within 0-3 min before the end of casting. NL / min refers to the flow rate under the standard conditions of 20 degrees Celsius and 1 atmosphere pressure, i.e., the flow rate in liters per minute. The above method controls the gas flow rate of the gas inlet of the first gas curtain wall 001 and the second gas curtain wall 003, which is beneficial to further control the size of the bubbles generated by the first gas curtain wall 001 and the second gas curtain wall 003, and thus ensures that bubbles of different sizes can be generated at the same time. The relatively large bubbles are beneficial to stirring the liquid steel and disrupting the flow field near the stopper, thereby avoiding the formation of high-speed laminar flow during the flow of the liquid steel into the nozzle. The relatively small bubbles have a small upward velocity, which increases the collision opportunity with metal inclusions in the liquid steel, thereby increasing the probability of growth and upward movement of the inclusions, and thus achieving the capture and removal of large inclusions, thereby reducing the defect rate of large inclusions on the surface of the plate and coil, and thus improving the quality of the finished product.

[0067] In some embodiments, the first gas curtain wall 001 has a first gas flow rate, the second gas curtain wall 003 has a second gas flow rate, and the first gas flow rate is less than the second gas flow rate when the gas blowing hole diameter of the first gas curtain wall 001 is less than the gas blowing hole diameter of the second gas curtain wall 003.

[0068] Exemplarily, the blowing hole diameter of the first gas curtain dam portion 001 is 0.12 mm. The blowing hole diameter of the second gas curtain dam portion 003 is 0.45 mm. Exemplarily, the gas flow rate flowing into the gas inlet portion 004 can be controlled according to different casting periods. Exemplarily, the gas flow rate of the blowing hole of the first gas curtain dam portion 001 can be controlled to be 10-20 NL / min, and the gas flow rate of the blowing hole of the second gas curtain dam portion 003 can be controlled to be 30-40 NL / min within 0-2 min before the start of casting, so as to ensure that the gas holes are not blocked. After 2-4 min of casting, the gas flow rate of the blowing hole of the first gas curtain dam portion 001 can be controlled to be 20-30 NL / min, and the gas flow rate of the blowing hole of the second gas curtain dam portion 003 can be controlled to be 50-60 NL / min, so as to increase the gas flow rate under the premise of ensuring that the crystallizer liquid level is not fluctuated, which is helpful to remove inclusions and prevent nozzle blockage. Within 0-3 min before the stop of casting, the gas flow rate of the blowing hole of the first gas curtain dam portion 001 can be controlled to be 10-20 NL / min, and the gas flow rate of the blowing hole of the second gas curtain dam portion 003 can be controlled to be 30-40 NL / min, so as to ensure that the gas holes are not blocked. Since the bubble size is simultaneously affected by the flowing gas flow rate and the gas hole diameter, by simultaneously limiting the blowing hole diameter of the first gas curtain dam portion 001 to be smaller than the blowing hole diameter of the second gas curtain dam portion 003 and the gas flow rate flowing into the first gas curtain dam portion 001 to be smaller than the gas flow rate flowing into the second gas curtain dam portion 003, the first gas curtain dam portion 001 can further generate small bubbles, so as to increase the collision opportunity with the metal inclusions in the molten steel, thereby increasing the probability of the growth and floating of the inclusions. The second gas curtain dam portion 003 generates large bubbles, so as to disturb the flow field near the stopper, avoid the formation of high-speed laminar flow during the flow of the steel flow to the inside of the nozzle, thereby realizing the capture and removal of large inclusions, and thereby achieving the effect of reducing the large inclusion defect rate on the surface of the plate and coil, and thereby improving the quality of the finished product.

[0069] Example 1

[0070] In order to verify the application effect of the continuous casting tundish and the continuous casting control method, the present example is carried out in a double-flow slab tundish. One flow is generated by using a conventional process for casting, and the other flow is generated by using the continuous casting tundish and the continuous casting control method of the present application.

[0071] The parameters of the continuous casting tundish are as follows: the outer diameter of the second gas curtain baffle part 003 is 200 mm, the inner diameter of the second gas curtain baffle part 003 is 170 mm, the width of the second gas curtain baffle part 003 is 30 mm, the dispersion refractory gas blowing aperture of the second gas curtain baffle part 003 is 0.45 mm; the outer diameter of the first gas curtain baffle part 001 is 160 mm, the inner diameter of the first gas curtain baffle part 001 is 130 mm, the width of the first gas curtain baffle part 001 is 30 mm, the gap between the first gas curtain baffle part 001 and the second gas curtain baffle part 003 is 10 mm, and the dispersion refractory gas blowing aperture of the first gas curtain baffle part 001 is 0.12 mm.

[0072] The main component requirements of the high-end automobile panel steel in the embodiment are shown in the following table:

[0073] Table 1 Steel grade component range / %

[0074]

[0075] The casting section is 230*1600 mm, and the drawing speed is 1.3 m / min.

[0076] Before the start of the casting, during the pouring of the molten steel from the ladle to the tundish, the dispersion refractory gas blowing aperture gas flow of the second gas curtain baffle part 003 is controlled to be 30 NL / min, and the dispersion refractory gas blowing aperture gas flow of the first gas curtain baffle part 001 is controlled to be 15 NL / min.

[0077] After 3 min of the start of the casting, when the tundish weight reaches a stable value, that is, when the rated capacity of the tundish is reached, the dispersion refractory gas blowing aperture gas flow of the second gas curtain baffle part 003 is controlled to be 50 NL / min, and the dispersion refractory gas blowing aperture gas flow of the first gas curtain baffle part 001 is controlled to be 25 NL / min.

[0078] The above process is used until the whole casting of 13 heats is continuously cast. 3 min before the stop of the casting, the dispersion refractory gas blowing aperture gas flow of the second gas curtain baffle part 003 is controlled to be 30 NL / min, and the dispersion refractory gas blowing aperture gas flow of the first gas curtain baffle part 001 is controlled to be 10 NL / min.

[0079] After the casting is completed, the double-flow billets are sampled, the automatic scanning electron microscope is used to analyze the large inclusion number density, and the liquid surface fluctuation of the double-flow mold and the surface defect rate after rolling are compared and analyzed.

[0080] The comparison results are shown in Table 2:

[0081] Table 2

[0082] Item Conventional process Double ring type air curtain barrier >20um inclusion number density pieces / 100mm 2 ]] 4.5 2.8 Crystallizer level fluctuation < ± 3 mm ratio / % 98.3 98.7 Large scale inclusion defect rate % on coil surface 6.7 4.1

[0083] The above results show that after the method is used, the number density of large-size inclusions is reduced by 37%, the liquid surface fluctuation of the crystallizer does not cause obvious changes, and the large-size inclusion defect rate of the plate roll surface is 39%. That is, the application of the continuous casting tundish and the continuous casting control method of the application improves the removal effect of large-size inclusions in the continuous casting process, and effectively reduces the large-size inclusion defect rate of the plate roll surface.

[0084] As Figure 3 shown, the third aspect of the embodiment of the application provides a continuous casting control device, which comprises:

[0085] The first control unit 21 is used for controlling the gas into the gas inlet portion 004, so that the gas forms bubbles of different sizes through the first gas curtain wall portion 001 and the second gas curtain wall 003.

[0086] The second control unit 22 is used for controlling the steel liquid to be poured into the tundish through the liquid inlet 005.

[0087] The fourth aspect of the embodiment of the application further provides a computer readable storage medium, and the above storage medium comprises a stored program, wherein the above program is executed by a processor to realize the above continuous casting control method. The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to one or more, and the kernel parameters are adjusted to realize any one of the continuous casting control methods of the second aspect, so as to solve the problem that the removal effect of large-size inclusions in the continuous casting process is poor, resulting in a high large-size inclusion defect rate of the plate roll surface.

[0088] As Figure 4 shown, the fifth aspect of the embodiment of the application further provides a device 300, which comprises a memory 310, a processor 320, and a computer program 311 stored in the memory 320 and executable on the processor. The processor 320 executes the computer program 311 to realize the steps of any one of the continuous casting control methods of the second aspect.

[0089] Since the device introduced in the embodiment is the device used for implementing the continuous casting control device in the embodiment of the application, based on the method introduced in the embodiment of the application, those skilled in the art can understand the specific implementation mode of the device of the embodiment and various changes thereof, so that how the device realizes the method in the embodiment of the application is not introduced in detail. As long as the device used by those skilled in the art to implement the method in the embodiment of the application belongs to the scope of the application.

[0090] In the specific implementation process, the computer program 311 can realize Figure 2 any one of the embodiments of the corresponding continuous casting control method when executed by the processor.

[0091] It should be noted that in the above examples, the description of each example focuses on different aspects, and the parts not described in detail in a certain example can be referred to the relevant description of other examples.

[0092] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) containing computer-usable program code.

[0093] The embodiments of the present application are described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that carries out the functions specified in one or more blocks.

[0094] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that carries out the functions specified in one or more blocks.

[0095] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable data processing device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that carries out the functions specified in one or more blocks.

[0096] The embodiments of the present application also provide a computer program product, which includes computer software instructions, when the computer software instructions run on a processing device, so that the processing device executes the functions as described in the embodiments of the present application. Figure 2A continuous casting method according to an embodiment.

[0097] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center, etc. containing one or more available media. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0098] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0099] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0100] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0101] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0102] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in the form of a contribution to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various other media that can store program codes.

[0103] The above, the above embodiments are only to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A continuous casting tundish, characterized by, Comprising: a first gas curtain baffle part arranged in the tundish; a second gas curtain baffle part arranged in the tundish; a gas inlet part communicated with the tundish, the first gas curtain baffle part and the second gas curtain baffle part covering the gas inlet of the gas inlet part; a liquid inlet part communicated with the tundish; wherein the gas blowing hole diameter of the first gas curtain baffle part is different from the gas blowing hole diameter of the second gas curtain baffle part; the first gas curtain baffle part is arranged around the liquid inlet part; the second gas curtain baffle part is arranged around the first gas curtain baffle part; there is a gap between the first gas curtain baffle part and the second gas curtain baffle part; the gas blowing hole diameter of the second gas curtain baffle part is larger than the gas blowing hole diameter of the first gas curtain baffle part.

2. The continuous casting tundish according to claim 1, characterized in that The gas inlet part comprises: a first gas inlet pipe, the first gas curtain baffle part covering the gas inlet of the first gas inlet pipe; a second gas inlet pipe, the second gas curtain baffle part covering the gas inlet of the second gas inlet pipe.

3. The continuous casting tundish according to claim 1, wherein: the first gas curtain baffle part and the second gas curtain baffle part are made of a dispersed type gas-permeable refractory material; and / or the first gas curtain baffle part is annular, the inner diameter of the first gas curtain baffle part is greater than or equal to 120 mm and less than or equal to 140 mm, the outer diameter of the first gas curtain baffle part is greater than or equal to 160 mm and less than or equal to 180 mm, and the width of the first gas curtain baffle part is greater than or equal to 30 mm and less than or equal to 40 mm, the second gas curtain baffle part is annular, the inner diameter of the second gas curtain baffle part is greater than or equal to 160 mm and less than or equal to 180 mm, the outer diameter of the second gas curtain baffle part is greater than or equal to 190 mm and less than or equal to 210 mm, and the width of the second gas curtain baffle part is greater than or equal to 20 mm and less than or equal to 30 mm; and / or the gas blowing hole diameter of the first gas curtain baffle part is greater than or equal to 0.08 mm and less than or equal to 0.15 mm; and / or the gas blowing hole diameter of the second gas curtain baffle part is greater than or equal to 0.20 mm and less than or equal to 0.50 mm.

4. The continuous casting tundish according to claim 3, wherein: in the case where the first gas curtain baffle part and the second gas curtain baffle part are both annular, the gap is the radial distance between the inner diameter of the second gas curtain baffle part and the outer diameter of the first gas curtain baffle part, and the gap is greater than or equal to 10 mm and less than or equal to 20 mm.

5. A continuous casting control method characterized by, A method for controlling the continuous casting tundish according to any one of claims 1 to 4, the method comprising: controlling the gas to be introduced into the gas inlet part so that the gas forms gas bubbles of different sizes through the first gas curtain baffle part and the second gas curtain baffle part; controlling the molten steel to be poured into the crystallizer through the liquid inlet part.

6. The continuous casting control method according to claim 5, wherein: the gas flow rate introduced into the first gas curtain baffle part is a first flow rate, and the gas flow rate introduced into the second gas curtain baffle part is a second flow rate, and in the case where the gas blowing hole diameter of the first gas curtain baffle part is smaller than the gas blowing hole diameter of the second gas curtain baffle part, the first flow rate is smaller than the second flow rate.

7. A continuous casting control device characterized by comprising: Comprising: the continuous casting tundish according to any one of claims 1 to 4; A first control unit is configured to control the introduction of gas into the gas inlet portion so that the gas forms bubbles of different sizes through the first and second gas curtain baffle portions. A second control unit is configured to control the pouring of the molten steel into the crystallizer through the liquid inlet.

8. A storage medium, characterized by The storage medium includes a stored program, wherein the program, when executed by a processor, implements the continuous casting control method of any one of claims 5-6.

9. An apparatus, comprising: The device includes at least one processor and at least one memory connected to the processor; wherein the processor is configured to invoke program instructions in the memory to execute the continuous casting control method of any one of claims 5-6.

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