Method, device and equipment for measuring liquid slag immersion depth and readable storage medium

Abstract

The application discloses a liquid slag immersion depth measuring method, device, equipment and readable storage medium, and the liquid slag immersion depth measuring method comprises the following steps: acquiring the temperature of multiple temperature measuring points on a crystallizer copper plate from top to bottom; obtaining the heat flow density of each temperature measuring point according to the temperature of each temperature measuring point; obtaining the heat flow density gradient between each two adjacent temperature measuring points according to the heat flow density of each temperature measuring point; extracting the position where the heat flow density gradient sharply decreases from the change trend of each heat flow density gradient, and the position is the bottom position of the liquid slag; and the difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid level position in the crystallizer is the liquid slag immersion depth. The application solves the technical problem that the liquid slag immersion depth cannot be obtained in the continuous casting process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cast steel, further, to a liquid slag immersion depth measurement method, device, equipment and readable storage medium, especially to a continuous casting mold powder liquid slag immersion depth measurement method, device, equipment and readable storage medium. BACKGROUND

[0002] The mold powder is an important functional material used in the continuous casting process, which mainly has the functions of heat insulation and heat preservation to prevent the steel liquid surface from being crusty, prevents the secondary oxidation of the steel liquid, absorbs the floating inclusions, lubricates the casting blank, and controls the heat transfer between the blank shell and the mold. The lubrication of the casting blank is mainly realized by the liquid slag film on one side of the casting blank, and if the liquid slag film formation effect is not good, it may cause sticking and leakage; and the heat transfer between the blank shell and the mold is mainly realized by the solid slag film on the other side of the mold, and if the heat control ability of the solid slag film is insufficient, it may cause surface quality problems such as concave or crack on the surface of the casting blank. The shape of the slag film between the blank shell and the mold not only relates to whether the casting can be completed smoothly, but also has an important influence on the surface quality of the casting blank.

[0003] At present, there is no method for measuring the characteristics of the slag film in real time, so the immersion depth of the liquid slag cannot be known during the casting process, and there are still some hidden dangers in forming high-quality casting blanks.

[0004] In view of the problem that the immersion depth of the liquid slag cannot be known in the related art, no effective solution has been given so far.

[0005] Therefore, the present application is proposed based on the experience and practice of the present inventor in the relevant industry for many years to overcome the defects of the prior art. SUMMARY

[0006] The present application aims to provide a liquid slag immersion depth measurement method, device, equipment and readable storage medium, which can realize the measurement of the continuous casting liquid slag immersion depth based on the high spatial resolution temperature measurement of the dual fiber grating, combined with the mathematical model algorithm and the pattern recognition technology, realizes the measurement and calculation of the continuous casting mold powder liquid slag immersion depth, and the measurement of the circumferential distribution of the mold.

[0007] The object of the present application can be achieved by using the following technical solutions:

[0008] The present application provides a liquid slag immersion depth measurement method, comprising the following steps:

[0009] Obtaining the temperature of a plurality of temperature measurement points on the copper plate of the mold from top to bottom;

[0010] According to the temperature of each temperature measurement point, the heat flux density of each temperature measurement point is obtained;

[0011] According to the heat flow density of each temperature measuring point, a heat flow density gradient between each two adjacent temperature measuring points is obtained;

[0012] According to the change trend of each heat flow density gradient, a position where the heat flow density gradient sharply decreases is extracted as the bottom position of the liquid slag;

[0013] A difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid level position in the crystallizer is the liquid slag immersion depth.

[0014] In a preferred embodiment of the present application, the temperature of the plurality of temperature measuring points on the crystallizer copper plate is obtained from top to bottom, including:

[0015] A plurality of temperature measuring points are sequentially and spaced apart on the crystallizer copper plate from top to bottom;

[0016] A first temperature measuring hole and a second temperature measuring hole are respectively arranged at each temperature measuring point from close to the slab shell to far away from the slab shell;

[0017] A temperature measuring assembly is respectively arranged in each first temperature measuring hole and each second temperature measuring hole, so that the temperature measuring assembly is completely embedded in the interior of the crystallizer copper plate;

[0018] Each temperature measuring assembly respectively collects the temperature of the crystallizer copper plate at the corresponding position.

[0019] In a preferred embodiment of the present application, the distance between two adjacent temperature measuring points is greater than or equal to 5 mm.

[0020] In a preferred embodiment of the present application, the temperature measuring assembly is a light grating temperature sensor.

[0021] In a preferred embodiment of the present application, the calculation formula of the heat flow density at the same temperature measuring point is:

[0022]

[0023] Wherein, q is the heat flow density; λ Cu is the thermal conductivity of the crystallizer copper plate; T1 is the temperature collected by the temperature measuring assembly close to the slab shell; T2 is the temperature collected by the temperature measuring assembly far away from the slab shell; d is the distance between the two temperature measuring assemblies at the same temperature measuring point.

[0024] In a preferred embodiment of the present application, n temperature measuring points are arranged on each column of the crystallizer copper plate from top to bottom, and then n heat flow densities can be calculated.

[0025] In a preferred embodiment of the present application, the calculation formula of the heat flow density gradient between two adjacent temperature measuring points is:

[0026]

[0027] wherein q i is the heat flux density of the ith temperature measuring point from top to bottom; q i+1 is the heat flux density of the (i+1)th temperature measuring point from top to bottom; Grad q is the heat flux density gradient between the ith temperature measuring point and the (i+1)th temperature measuring point; D is the distance between the ith temperature measuring point and the (i+1)th temperature measuring point.

[0028] In a preferred embodiment of the present application, n temperature measuring points are arranged on each column of the crystallizer copper plate from top to bottom, and (n-1) heat flux density gradients can be calculated.

[0029] In a preferred embodiment of the present application, the position where the heat flux density gradient sharply decreases is extracted according to the change trend of each heat flux density gradient, which is the bottom position of the liquid slag.

[0030] According to each heat flux density gradient, a relationship graph between the distance from each temperature measuring point position to the liquid surface position of the molten steel and each heat flux density gradient is drawn.

[0031] The position where the heat flux gradient sharply decreases in the relationship graph is extracted.

[0032] In a preferred embodiment of the present application, the position where the heat flux gradient sharply decreases in the relationship graph is extracted by using a pattern recognition technology.

[0033] In a preferred embodiment of the present application, the difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid surface position of the molten steel in the crystallizer is the liquid slag immersion depth.

[0034] A plurality of temperature measuring portions are arranged on the crystallizer copper plate along the circumferential direction, and a plurality of temperature measuring points are arranged from top to bottom in each temperature measuring portion.

[0035] The liquid slag immersion depth of each temperature measuring portion is measured and calculated, and the liquid slag immersion depth distribution data on the circumferential direction of the crystallizer can be obtained.

[0036] The present application provides a liquid slag immersion depth measuring device, comprising:

[0037] A temperature measuring unit is used to obtain the temperature of a plurality of temperature measuring points on the crystallizer copper plate from top to bottom.

[0038] A heat flux density obtaining unit is used to obtain the heat flux density of each temperature measuring point according to the temperature of each temperature measuring point.

[0039] a heat flow density gradient acquisition unit configured to acquire heat flow density gradients between each two adjacent temperature measuring points according to heat flow densities of the temperature measuring points;

[0040] a liquid slag bottom determination unit configured to extract a position where the heat flow density gradient sharply decreases as a bottom position of the liquid slag according to a change trend of the heat flow density gradients;

[0041] a liquid slag immersion depth determination unit configured to obtain a difference between a distance from a top position of the crystallizer copper plate to the bottom position of the liquid slag and a liquid level position of molten steel in the crystallizer, as a liquid slag immersion depth.

[0042] In a preferred embodiment of the present application, the liquid slag bottom determination unit comprises:

[0043] a graph generation module configured to draw a relationship graph between distances from each temperature measuring point position to the liquid level position of the molten steel and each heat flow density gradient according to the heat flow density gradients;

[0044] a liquid slag bottom extraction module configured to extract a position where the heat flow gradient sharply decreases in the relationship graph.

[0045] In a preferred embodiment of the present application, the liquid slag immersion depth measuring device further comprises:

[0046] a liquid slag immersion depth distribution determination unit configured to measure and calculate the liquid slag immersion depth of each column of temperature measuring units, so as to obtain liquid slag immersion depth distribution data in a circumferential direction of the crystallizer.

[0047] The present application provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the liquid slag immersion depth measuring method.

[0048] The present application provides a computer readable storage medium storing a computer program for executing the liquid slag immersion depth measuring method.

[0049] The features and advantages of the liquid slag immersion depth measuring method, device, equipment and readable storage medium of the present application are as follows: the temperature of the multiple preset temperature measuring points on the crystallizer copper plate from top to bottom is collected by the multiple temperature measuring components, the heat flux density of each temperature measuring point is calculated according to the temperature of each temperature measuring point, the heat flux density gradient between each two adjacent temperature measuring points is calculated according to the heat flux density, the bottom position of the liquid slag is determined according to the change trend of the heat flux density gradient, and thus the difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid level position in the crystallizer is the liquid slag immersion depth. The present application applies the space temperature measuring technology, model calculation and pattern recognition technology to the continuous casting field, can realize the measurement of the liquid slag immersion depth of the continuous casting, can obtain the circumferential distribution data of the liquid slag immersion depth according to the measurement of the liquid slag immersion depth, provides technical support for the optimization of the protective slag and the improvement of the quality of the continuous casting billet, and greatly improves the quality of the casting billet. BRIEF DESCRIPTION OF DRAWINGS

[0050] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application.

[0051] Wherein:

[0052] Figure 1 : is one of the flowcharts of the liquid slag immersion depth measuring method of the present application.

[0053] Figure 2 : is the second flowchart of the liquid slag immersion depth measuring method of the present application.

[0054] Figure 3 : is the third flowchart of the liquid slag immersion depth measuring method of the present application.

[0055] Figure 4 : is the fourth flowchart of the liquid slag immersion depth measuring method of the present application.

[0056] Figure 5 : is one of the structural block diagrams of the liquid slag immersion depth measuring device of the present application.

[0057] Figure 6 : is the second structural block diagram of the liquid slag immersion depth measuring device of the present application.

[0058] Figure 7 : is the setting position diagram of each temperature measuring point in the liquid slag immersion depth measuring method of the present application.

[0059] Figure 8 : is Figure 7 the local enlarged view of the A position.

[0060] Figure 9 : is the structural diagram of the crystallizer inside in the liquid slag immersion depth measuring method of the present application.

[0061] Figure 10 : This is a graph showing the relationship between the temperature measurement location and the heat flux density in the liquid slag immersion depth measurement method of the present invention.

[0062] The reference numerals in the accompanying drawings of this invention are:

[0063] 10. Temperature measurement unit; 20. Heat flux density acquisition unit;

[0064] 30. Heat flux density gradient acquisition unit; 40. Liquid slag bottom determination unit;

[0065] 41. Graphic generation module; 42. Liquid residue bottom extraction module;

[0066] 50. Unit for determining the immersion depth of liquid slag;

[0067] 1. Copper plate of the crystallizer; 2. Temperature measuring point;

[0068] 3. First temperature measuring port; 4. Second temperature measuring port;

[0069] 5. Billet shell; 6. Solid slag;

[0070] 7. Liquid residue; 8. Air gap. Detailed Implementation

[0071] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0072] Implementation Method 1

[0073] like Figure 1 As shown, the present invention provides a method for measuring the immersion depth of liquid slag, which includes the following steps:

[0074] Step S101: Obtain the temperature of multiple temperature measuring points on the copper plate 1 of the crystallizer from top to bottom;

[0075] Furthermore, such as Figure 2 As shown, step S101 includes:

[0076] Step S1011: As Figure 7 As shown, multiple temperature measuring points 2 are arranged sequentially from top to bottom and spaced apart on the side edge of the copper plate 1 of the crystallizer;

[0077] Step S1012: As Figure 8As shown, a first temperature measuring hole 3 and a second temperature measuring hole 4 are respectively arranged at each temperature measuring point 2 in the direction close to the slab shell 5 and in the direction away from the slab shell 5; wherein the first temperature measuring hole 3 and the second temperature measuring hole 4 can be through holes penetrating the crystallizer copper plate 1, or can be blind holes extending into the crystallizer copper plate 1, as long as the installation requirements of the temperature measuring assembly are met;

[0078] Step S1013: a temperature measuring assembly is arranged in each first temperature measuring hole 3 and each second temperature measuring hole 4, and the installation requirement of the temperature measuring assembly is that the temperature measuring assembly can be completely embedded in the interior of the crystallizer copper plate 1, so as to improve the stability of temperature measurement;

[0079] Step S1014: each temperature measuring assembly collects the temperature of the corresponding position of the crystallizer copper plate 1.

[0080] Further, the temperature measuring assembly can be, but is not limited to, a light grating temperature sensor.

[0081] Step S102: according to the temperature of each temperature measuring point 2, the heat flux density of each temperature measuring point 2 is obtained;

[0082] Specifically, the calculation formula of the heat flux density at the same temperature measuring point 2 is:

[0083]

[0084] wherein q is the heat flux density; λ Cu is the thermal conductivity of the crystallizer copper plate; T1 is the temperature collected by the temperature measuring assembly close to the slab shell 5; T2 is the temperature collected by the temperature measuring assembly away from the slab shell 5; and d is the distance between the two temperature measuring assemblies at the same temperature measuring point 2.

[0085] If n temperature measuring points 2 are arranged on the crystallizer copper plate 1 from top to bottom in each column, then n (i.e. q1, q2 to q n ) heat flux densities can be obtained by the calculation formula of the heat flux density.

[0086] Step S103: according to the heat flux density of each temperature measuring point 2, the heat flux density gradient between each adjacent two temperature measuring points is obtained;

[0087] Specifically, the calculation formula of the heat flux density gradient between the adjacent two temperature measuring points 2 is:

[0088]

[0089] wherein q i is the heat flux density of the i-th temperature measuring point from top to bottom; q i+1 is the heat flux density of the (i+1)-th temperature measuring point from top to bottom; Grad qD is the heat flux density gradient between the ith temperature measuring point and the (i+1)th temperature measuring point; D is the distance between the ith temperature measuring point and the (i+1)th temperature measuring point.

[0090] Further, the distance between the two adjacent temperature measuring points 2 (i.e. the value of D) is greater than or equal to 5mm, thereby helping to improve the accuracy of measurement and calculation.

[0091] If n temperature measuring points 2 are arranged on each column from top to bottom on the crystallizer copper plate 1, then (n-1) heat flux density gradients can be calculated for each column through the calculation formula of the heat flux density gradient.

[0092] Step S104: According to the change trend of each heat flux density gradient, the position where the heat flux density gradient sharply decreases is extracted, which is the bottom position of the liquid slag 7.

[0093] As shown in Figure 9 , since there is solid slag 6, liquid slag 7 and air gap 8 between the casting blank shell 5 and the crystallizer copper plate 1, and the heat conduction characteristics of the solid slag 6, liquid slag 7 and air gap 8 are different, when there is no liquid slag 7 between the casting blank shell 5 and the crystallizer copper plate 1 (i.e. there is only solid slag 6 and air gap 8 between the casting blank shell 5 and the crystallizer copper plate 1), the heat conduction performance between the casting blank shell 5 and the crystallizer copper plate 1 will be greatly reduced, and therefore the bottom position of the liquid slag 7 can be determined according to the change trend of each heat flux density gradient.

[0094] Further, as shown in Figure 3 , step S104 includes:

[0095] Step S1041: According to each heat flux density gradient, a relationship graph between the distance from each temperature measuring point position to the molten steel liquid surface position and each heat flux density gradient is drawn.

[0096] Step S1042: The digital image processing technology in the pattern recognition technology is used to extract the position where the heat flux gradient sharply decreases in the relationship graph between the distance from each temperature measuring point position to the molten steel liquid surface position and each heat flux density gradient, and this position is the bottom position of the liquid slag 7.

[0097] Specifically, as shown in Figure 9 , Figure 10 , the liquid slag 7 above the bottom position of the liquid slag 7 has strong heat conduction capacity and large heat flux density, and the lower part of the liquid slag 7 is all solid slag 6 and there is air gap 8, which greatly reduces the heat conduction capacity and the heat flux density, and Figure 10 the position circled by the circle in is the position where the heat flux density changes abruptly, which is the bottom position of the liquid slag 7. Of course, different heat flux density changes can be set as the judgment standard of the pattern recognition technology according to the actual situation, so as to obtain the position where the heat flux density changes abruptly.

[0098] Step S105: the difference between the distance from the top of the crystallizer copper plate 1 to the bottom of the liquid slag 7 and the liquid surface position in the crystallizer is the liquid slag immersion depth.

[0099] In an optional embodiment of the present application, as shown in Figure 4 After step S105, the method further comprises:

[0100] Step S106: a plurality of temperature measuring parts are arranged on the crystallizer copper plate 1 along the circumference thereof, and a plurality of temperature measuring points 2 are arranged from top to bottom in each temperature measuring part;

[0101] Step S107: the liquid slag immersion depth of each temperature measuring part is measured and calculated, so as to obtain the liquid slag immersion depth distribution data along the circumference of the entire crystallizer.

[0102] The method for measuring the liquid slag immersion depth has the following characteristics and advantages:

[0103] The method for measuring the liquid slag immersion depth collects the temperatures of the plurality of temperature measuring points 2 arranged from top to bottom on the crystallizer copper plate 1, so as to obtain two temperature values at the positions close to and away from the billet shell 5 of each temperature measuring point 2, and then the heat flux density of each temperature measuring point 2 is calculated according to the two temperature values, and the heat flux density gradient between each two adjacent temperature measuring points 2 is calculated according to the heat flux density. The bottom position of the liquid slag can be determined by the change trend of the heat flux density gradient by using the pattern recognition technology, so that the difference between the distance from the top of the crystallizer copper plate 1 to the bottom of the liquid slag 7 and the liquid surface position in the crystallizer is the liquid slag immersion depth. The present application applies the space temperature measurement technology, model calculation and pattern recognition technology to the continuous casting field, so as to realize the measurement of the liquid slag immersion depth in continuous casting, and obtain the data of the distribution of the liquid slag immersion depth along the circumference of the crystallizer according to the measurement of the liquid slag immersion depth, which provides technical support for the optimization of the protective slag and the improvement of the quality of the continuous casting billet, and greatly improves the quality of the billet.

[0104] Embodiment two

[0105] As shown in Figure 5 The present application provides a liquid slag immersion depth measuring device, which comprises:

[0106] A temperature measuring unit 10 is arranged to obtain the temperatures of a plurality of temperature measuring points 2 on the crystallizer copper plate 1 from top to bottom.

[0107] A heat flux density obtaining unit 20 is arranged to obtain the heat flux density of each temperature measuring point 2 according to the temperature of each temperature measuring point 2. The calculation formula of the heat flux density of the same temperature measuring point 2 is as follows:

[0108]

[0109] wherein q is heat flux density; λ Cu is the thermal conductivity of the crystallizer copper plate; T1 is the temperature collected by the temperature measuring component close to the slab shell 5; T2 is the temperature collected by the temperature measuring component far from the slab shell 5; and d is the distance between the two temperature measuring components at the same temperature measuring point 2.

[0110] n temperature measuring points 2 are arranged on the crystallizer copper plate 1 from top to bottom in each column, and then n (i.e., q1, q2 to q n ) heat flux densities can be calculated by the calculation formula of heat flux density.

[0111] The heat flux density gradient acquisition unit 30 is configured to obtain the heat flux density gradient between each two adjacent temperature measuring points 2 according to the heat flux density of each temperature measuring point 2, and the calculation formula of the heat flux density gradient between the two adjacent temperature measuring points 2 is as follows:

[0112]

[0113] wherein q i is the heat flux density of the ith temperature measuring point from top to bottom; q i+1 is the heat flux density of the (i+1)th temperature measuring point from top to bottom; Grad q is the heat flux density gradient between the ith temperature measuring point and the (i+1)th temperature measuring point; and D is the distance between the ith temperature measuring point and the (i+1)th temperature measuring point.

[0114] If n temperature measuring points 2 are arranged on the crystallizer copper plate 1 from top to bottom in each column, then (n-1) heat flux density gradients can be calculated in each column by the calculation formula of heat flux density gradient.

[0115] Further, the distance between the two adjacent temperature measuring points 2 (i.e., the value of D) is greater than or equal to 5 mm, so as to help improve the accuracy of measurement and calculation.

[0116] The liquid slag bottom determination unit 40 is configured to extract the position where the heat flux density gradient sharply decreases from the change trend of each heat flux density gradient, and the position is the bottom position of the liquid slag 7.

[0117] The liquid slag immersion depth determination unit 50 is configured to calculate the difference between the distance from the top position of the crystallizer copper plate 1 to the bottom position of the liquid slag 7 and the liquid level position of the molten steel in the crystallizer, and the difference is the liquid slag immersion depth.

[0118] In an optional embodiment of the present application, as Figure 7 , Figure 8As shown, a plurality of temperature measuring points 2 are sequentially and spacedly arranged on the side edges of the crystallizer copper plate 1 from top to bottom; a first temperature measuring hole 3 and a second temperature measuring hole 4 are respectively arranged at each temperature measuring point 2 from the position close to the billet shell 5 to the position far away from the billet shell 5; and a temperature measuring assembly is arranged in each first temperature measuring hole 3 and each second temperature measuring hole 4, so as to collect the temperature of the crystallizer copper plate 1 at the corresponding position through each temperature measuring assembly.

[0119] Further, the temperature measuring assembly can be completely embedded in the interior of the crystallizer copper plate 1, so as to improve the stability of temperature measurement.

[0120] Further, the temperature measuring assembly can be, but is not limited to, a light grating temperature sensor.

[0121] In an optional embodiment of the present application, as shown, Figure 6 The liquid slag bottom determining unit 40 comprises:

[0122] The graph generating module 41 is used for drawing a graph of the distance between each temperature measuring point position and the liquid steel surface position and each heat flow density gradient according to each heat flow density gradient;

[0123] The liquid slag bottom extracting module 42 is used for extracting the position where the heat flow gradient sharply decreases in the graph of the distance between each temperature measuring point position and the liquid steel surface position and each heat flow density gradient, and the position is the bottom position of the liquid slag 7.

[0124] In an optional embodiment of the present application, the liquid slag immersion depth measuring device further comprises a liquid slag immersion depth distribution determining unit, which is used for measuring and calculating the liquid slag immersion depth of each column of temperature measuring units, so as to obtain the liquid slag immersion depth distribution data in the circumferential direction of the crystallizer.

[0125] The liquid slag immersion depth measuring device has the following characteristics and advantages:

[0126] The liquid slag immersion depth measuring device can realize the measurement of the liquid slag immersion depth of continuous casting by means of high spatial resolution temperature measurement based on double fiber grating, combined with mathematical model algorithm and pattern recognition technology, realizes the measurement and calculation of the liquid slag immersion depth of the continuous casting protective slag and the measurement of the circumferential distribution of the liquid slag immersion depth of the continuous casting protective slag, and provides technical support for the optimization of the protective slag and the improvement of the quality of the continuous casting billet.

[0127] Embodiment three

[0128] The present application provides a computer device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the above-mentioned liquid slag immersion depth measuring method when executing the computer program.

[0129] Specifically, the computer device can be a computer terminal, a server or a similar computing device.

[0130] Embodiment Four

[0131] The application provides a computer readable storage medium, which stores a computer program for executing the measurement method of the liquid slag immersion depth.

[0132] In particular, the computer readable storage medium includes permanent and non-permanent, removable and non-removable media, which can be realized by any method or technology to store information. The information can be computer readable instructions, data structures, program modules or other data. Examples of computer readable storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, the computer readable storage medium does not include transitory computer readable media such as modulated data signals and carriers.

[0133] 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 a complete hardware embodiment, a complete 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 magnetic disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0134] The present application is described with reference to flowcharts and / or block diagrams according to the method, device (system) and computer program product of the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of the flows and / or blocks in the flowchart and / or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general purpose computer, a special purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowchart and / or block diagram. Figure 1 The device for performing the function specified in one flow or multiple flows and / or blocks Figure 1 The device for performing the function specified in one flow or multiple flows and / or blocks

[0135] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flow Figure 1 The flow or flows and / or blocks Figure 1 The flow or flows and / or blocks

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that are executed on the computer or other programmable apparatus provide steps for implementing the flow Figure 1 The flow or flows and / or blocks Figure 1 The flow or flows and / or blocks

[0137] The above description is only a specific implementation of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A method of measuring the immersion depth of a liquid slag, characterized by, The method comprises the following steps: obtaining the temperature of multiple temperature measuring points on the crystallizer copper plate from top to bottom; obtaining the heat flux density of each temperature measuring point according to the temperature of each temperature measuring point; obtaining the heat flux density gradient between two adjacent temperature measuring points according to the heat flux density of each temperature measuring point; the calculation formula of the heat flux density gradient between two adjacent temperature measuring points is: wherein q i is the heat flux density of the ith temperature measurement point from top to bottom; q i+1 is the heat flux density of the (i+1)th temperature measurement point from top to bottom; Grad q is the heat flux density gradient between the ith temperature measurement point and the (i+1)th temperature measurement point; and D is the distance between the ith temperature measurement point and the (i+1)th temperature measurement point. extracting the position where the heat flux density gradient sharply decreases from the change trend of each heat flux density gradient, which is the bottom position of the liquid slag; drawing a relationship graph between the distance from each temperature measuring point position to the liquid steel surface position and each heat flux density gradient according to each heat flux density gradient; extracting the position where the heat flux gradient sharply decreases in the relationship graph by using the digital image processing technology in the pattern recognition technology, wherein the part above the bottom of the liquid slag is liquid slag, the part below the bottom of the liquid slag is solid slag and there is an air gap, so that the heat flux density of the bottom position of the liquid slag changes abruptly; the difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid steel surface position in the crystallizer is the liquid slag immersion depth.

2. The method of measuring the liquid slag immersion depth according to claim 1, wherein The method for obtaining the temperature of multiple temperature measuring points on the crystallizer copper plate from top to bottom comprises the following steps: sequentially and intervally arranging multiple temperature measuring points on the crystallizer copper plate from top to bottom; opening a first temperature measuring hole and a second temperature measuring hole in each temperature measuring point from the position close to the billet shell to the position far away from the billet shell; arranging a temperature measuring assembly in each first temperature measuring hole and each second temperature measuring hole, so that the temperature measuring assembly is completely embedded in the interior of the crystallizer copper plate; each temperature measuring assembly collects the temperature of the corresponding position on the crystallizer copper plate.

3. The method of measuring the liquid dregs immersion depth according to claim 1 or 2, wherein The distance between two adjacent temperature measuring points is greater than or equal to 5 mm.

4. The method of measuring the immersion depth of a liquid slag according to claim 2, wherein The temperature measuring assembly is a light grating temperature sensor.

5. The method of measuring the depth of immersion of a liquid slag according to claim 2, wherein The calculation formula of the heat flux density at the same temperature measuring point is: wherein q is the heat flux; λ Cu is the thermal conductivity of the crystallizer copper plate; T1 is the temperature collected by the temperature measuring component close to the casting blank shell; T2 is the temperature collected by the temperature measuring component far from the casting blank shell; and d is the distance between the two temperature measuring components at the same temperature measuring point.

6. The method of measuring the immersion depth of a liquid slag according to claim 5, wherein n heat flux densities can be calculated when n temperature measuring points are arranged on each column of the crystallizer copper plate from top to bottom.

7. The method of measuring the depth of immersion of a liquid slag according to claim 6, wherein (n-1) heat flux density gradients can be calculated when n temperature measuring points are arranged on each column of the crystallizer copper plate from top to bottom.

8. The method of measuring the liquid slag immersion depth according to claim 1, wherein, The difference between the distance from the top position of the crystallizer copper plate to the bottom position of the liquid slag and the liquid steel surface position in the crystallizer is the liquid slag immersion depth. The method for obtaining the temperature of multiple temperature measuring points on the crystallizer copper plate from top to bottom comprises the following steps: sequentially and intervally arranging multiple temperature measuring points on the crystallizer copper plate from top to bottom; 9. A measuring device for measuring the immersion depth of a liquid slag, which employs the measuring method according to any one of claims 1 to 8, characterized in that measuring and calculating the liquid slag immersion depth of each temperature measuring part, so as to obtain the liquid slag immersion depth distribution data in the circumferential direction of the crystallizer. The measuring device comprises: a temperature measuring unit for obtaining the temperature of multiple temperature measuring points on the crystallizer copper plate from top to bottom; a heat flux density obtaining unit for obtaining the heat flux density of each temperature measuring point according to the temperature of each temperature measuring point; a heat flux density gradient obtaining unit for obtaining the heat flux density gradient between two adjacent temperature measuring points according to the heat flux density of each temperature measuring point; The liquid slag bottom determining unit is configured to extract a position where the heat flux density gradient sharply decreases as the change trend of each heat flux density gradient, as the bottom position of the liquid slag. The liquid slag immersion depth determining unit is configured to obtain the liquid slag immersion depth by subtracting the distance between the top position of the crystallizer copper plate and the bottom position of the liquid slag from the liquid level position of the molten steel in the crystallizer.

10. The liquid dreg immersion depth measuring device as claimed in claim 9, wherein The liquid slag bottom determining unit comprises: A graph generating module configured to draw a relationship graph between the distance between each temperature measuring point position and the molten steel liquid level position and each heat flux density gradient according to each heat flux density gradient. A liquid slag bottom extracting module configured to extract the position where the heat flux gradient sharply decreases in the relationship graph.

11. The liquid dreg immersion depth measuring device as claimed in claim 9, wherein The liquid slag immersion depth measuring device further comprises: A liquid slag immersion depth distribution determining unit configured to measure and calculate the liquid slag immersion depth of each column of temperature measuring units, so as to obtain the liquid slag immersion depth distribution data in the circumferential direction of the crystallizer.

12. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the liquid slag immersion depth measuring method of any one of claims 1 to 8.

13. A computer-readable storage medium, characterized in that, The computer readable storage medium stores the computer program for executing the liquid slag immersion depth measuring method of any one of claims 1 to 8.

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