Semi-continuous casting ingot cold leakage prediction method

Abstract

The application discloses a kind of semi-continuous casting ingot cold leakage pre-determination methods.The cold leakage pre-determination method includes: according to the pre-set casting process parameters, the continuous trend data of the secondary cooling heat flux of ingot surface in the process of casting stage is calculated;According to the secondary cooling heat flux continuous trend data, draw the secondary cooling heat flux trend chart;The secondary cooling heat flux trend chart is compared with the pre-set anti-cold leakage heat flux trend range, whether the trend line in the secondary cooling heat flux trend chart is in the anti-cold leakage heat flux trend range, yes, it is judged that the pre-set casting process parameters will not cause the cold leakage of ingot, otherwise, it is judged that the pre-set casting process parameters will cause the cold leakage of ingot.The cold leakage pre-determination method of the application can accurately determine whether the casting process parameters will cause the cold leakage to occur, and the operator can accurately adjust the casting process parameters before casting the ingot, so as to effectively avoid the occurrence of cold leakage phenomenon.

Description

Technical Field

[0001] This invention relates to a semi-continuous casting technology, and more particularly to a method for pre-judging cold leakage in semi-continuous casting ingots. Background Technology

[0002] Currently, semi-continuous casting is commonly used to produce aluminum alloy ingots. The equipment used for this process is called a semi-continuous casting machine, and its main components include a crystallizer, secondary cooling water nozzles, and a casting head, etc. (all existing technologies, known to those skilled in the art). The crystallizer is used to solidify the liquid aluminum alloy into a billet shell. The secondary cooling water nozzles, located below the crystallizer, further cool the solidified aluminum alloy ingot by spraying water to improve the solidification rate. The cooling water sprayed from these nozzles is called secondary cooling water. The casting head is used to gradually pull the solidified aluminum alloy ingot out of the crystallizer at a certain casting speed.

[0003] In the casting of high-strength aluminum alloy ingots using a semi-continuous casting machine, the warping of the ingot tail during the initial casting stage often leads to aluminum leakage when the ingot exits the crystallizer. This phenomenon is known as "cold leakage." Cold leakage is an undesirable phenomenon during aluminum alloy ingot casting, which can lead to the failure of the entire casting process, resulting in machine downtime, reduced casting yield, and decreased on-site production efficiency. Therefore, avoiding cold leakage is crucial for the stable production of semi-continuous casting machines and for improving ingot quality.

[0004] Currently, preventing ingot tail warping to avoid cold leakage is mainly achieved by adjusting the casting process parameters. However, there is no precise method for adjusting the casting process parameters in the existing technology. At present, we can only rely on experience to adjust the casting process parameters. However, relying on experience to adjust is unreliable, and cold leakage will still occur frequently.

[0005] Furthermore, some prior art concepts involved in this invention are further explained as follows:

[0006] The casting start-up stage mentioned in this article refers to the initial casting stage of semi-continuous casting, which is the prelude to the unsteady-state stage. The unsteady-state stage refers to a stage in which data such as secondary cooling water flow rate and casting speed are unstable during the initial casting of semi-continuous casting. The definition of this casting start-up stage varies among different manufacturers, but generally, it is defined as the stage from when the ingot is pulled out of the crystallizer by the ingot head until the casting length reaches 30-500mm.

[0007] The casting length mentioned in this article refers to the casting length during the initial casting stage.

[0008] The secondary cooling water sprayed from the secondary cooling water nozzle comes from the crystallizer. A water pipe connected to the secondary cooling water nozzle is provided at the lower part of the crystallizer. An opening valve is provided on the water pipe. When the opening valve is opened, the cooling water in the crystallizer will be sprayed out to the surface of the ingot through the water pipe to the secondary cooling water nozzle. The sprayed water is the secondary cooling water. Summary of the Invention

[0009] The purpose of this invention is to provide a method for pre-judging cold leakage in semi-continuous casting ingots. This method can accurately determine whether the casting process parameters will lead to cold leakage, thereby effectively avoiding the occurrence of cold leakage.

[0010] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0011] A method for pre-determining cold leakage in semi-continuous casting ingots, the method comprising:

[0012] S1, based on the pre-set casting process parameters, calculate the continuous trend data of the secondary cooling heat flux on the surface of the ingot during the casting stage;

[0013] S2, Based on the continuous trend data of the secondary cooling heat flux, draw a trend diagram of the secondary cooling heat flux;

[0014] S3. Compare the secondary cooling heat flux trend diagram with the preset anti-cold leakage heat flux trend range, and determine whether the trend line in the secondary cooling heat flux trend diagram is within the anti-cold leakage heat flux trend range. If yes, it is determined that the preset casting process parameters will not cause cold leakage in the ingot; otherwise, it is determined that the preset casting process parameters will cause cold leakage in the ingot.

[0015] Further, S1 includes:

[0016] S11, divide the casting length into n equal length intervals;

[0017] S12, For each length interval, calculate the secondary cooling heat flux Q corresponding to that length interval;

[0018] S13, arrange and combine all the calculated secondary cooling heat flux Q data in order of their corresponding length intervals to obtain the continuous trend data of the secondary cooling heat flux.

[0019] Further, S12 includes:

[0020] S121, Calculate the ingot surface area movement rate L corresponding to the length interval. S ;

[0021] S122, Calculate the heat flux Q of the secondary cooling water heating and dissipation corresponding to the length interval. aSecondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c ;

[0022] S123, heat flux Q of the secondary cooling water is increased by heating. a Secondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c The sum is taken as the secondary cooling heat flux Q corresponding to the length interval.

[0023] Furthermore, the ingot surface area moving rate L S According to formula L S = (2W + 2T)·60S y The calculation yields the following formula: where W is the ingot width, T is the ingot thickness, and S... y This refers to the casting speed corresponding to the length range.

[0024] Furthermore,

[0025] The heat flux Q of the secondary cooling water for heating and heat dissipation a According to formula Q a =(100-T) W )·S W ·F / 3600 / L S The calculation shows that, in the formula, T W S represents the secondary cooling water temperature. W Let L be the specific heat capacity of the secondary cooling water, F be the secondary cooling water flow rate corresponding to the length range, and L be the flow rate. S The ingot surface area movement rate corresponding to the length range;

[0026] The heat flux Q from the vaporization of the secondary cooling water b According to formula Q b =H·F·A / 3600 / L S The calculation yields the following result: In the formula, H is the heat of vaporization of the secondary cooling water, F is the flow rate of the secondary cooling water corresponding to the length interval, A is the vaporization ratio of the secondary cooling water, and L... S The ingot surface area movement rate corresponding to the length range;

[0027] The heat flux Q from scaling in the secondary cooling water c According to formula Q c =7.82E D ·F / 3600 / L S The calculation shows that, in the formula, E D Where L is the conductivity of the secondary cooling water, F is the secondary cooling water flow rate corresponding to the length interval, and L is the conductivity of the secondary cooling water. S The ingot surface area movement rate corresponding to the length range.

[0028] Furthermore, the casting process parameters include casting speed, secondary cooling water flow rate, secondary cooling water temperature, and secondary cooling water conductivity.

[0029] Furthermore, the ingot is an aluminum alloy ingot, a copper ingot, a magnesium alloy ingot, a nickel ingot, or a chromium ingot.

[0030] The cold leakage pre-judgment method of the present invention is programmed into the main control computer of the casting production line, and is specifically implemented by the main control computer. Before each casting of an ingot of a certain specification, the operator first presets the casting process parameters for that specification of ingot based on experience. Then, the operator inputs the preset casting process parameters into the main control computer. The main control computer uses the aforementioned cold leakage pre-judgment method to pre-determine whether the preset casting process parameters will cause cold leakage in the ingot. If the determination is yes, the operator readjusts the casting process parameters and repeats the above process until it is determined that the preset casting process parameters will not cause cold leakage in the ingot. Then, the operator inputs the final preset casting process parameters into the main control computer, and the main control computer controls the semi-continuous casting machine to start casting based on these casting process parameters.

[0031] In the cold leakage pre-judgment method of the present invention, the continuous trend data of secondary cooling heat flux on the surface of the ingot during the casting stage is accurately calculated according to the pre-set casting process parameters. The secondary cooling heat flux trend diagram is plotted based on the continuous trend data of secondary cooling heat flux. The secondary cooling heat flux trend diagram is compared with the cold leakage prevention heat flux trend range to determine whether the trend line in the secondary cooling heat flux trend diagram is within the cold leakage prevention heat flux trend range. Thus, it is possible to accurately determine whether the pre-set casting process parameters will cause cold leakage in the ingot.

[0032] Compared with the prior art, the cold leakage pre-judgment method of the present invention has the following advantages: by judging whether the secondary cooling heat flux of the ingot is reasonable during the casting stage, the cold leakage pre-judgment method of the present invention can accurately determine whether the casting process parameters will lead to cold leakage. Operators can then accurately adjust the casting process parameters before casting the ingot, thereby effectively avoiding the occurrence of cold leakage, thus improving the stability and efficiency of semi-continuous casting machine production and improving the quality of the ingot. Attached Figure Description

[0033] Figure 1 This is a flowchart of the semi-continuous casting ingot cold leakage pre-judgment method of the present invention;

[0034] Figure 2This is a trend diagram of secondary cooling heat flux drawn for the first time when the cold leakage pre-judgment method of the present invention is used in actual production.

[0035] Figure 3 This is a second secondary cooling heat flux trend diagram drawn when the cold leakage pre-judgment method of the present invention is used in actual production. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0037] See Figures 1 to 3 This embodiment provides a method for pre-judging cold leakage in semi-continuous casting ingots. This method can accurately determine whether pre-set casting process parameters will lead to cold leakage, thereby effectively avoiding the occurrence of cold leakage.

[0038] The cold leakage pre-determination method of this embodiment relates to the production operation of a semi-continuous casting machine, particularly to the initial casting stage of semi-continuous casting. In this embodiment, the semi-continuous casting machine is used to cast aluminum alloy ingots. A casting production control computer is installed at the work site, and the production process of the semi-continuous casting machine is controlled by the casting production control computer.

[0039] See Figure 1 The cold leakage pre-determination method of this embodiment includes the following S1 to S3.

[0040] S1. Based on the pre-set casting start-up process parameters, calculate the continuous trend data of the secondary cooling heat flux on the ingot surface during the casting start-up stage. The casting start-up process parameters refer to the process parameters that need to be set for the semi-continuous casting machine during the casting start-up stage, including casting speed, secondary cooling water flow rate, secondary cooling water temperature, and secondary cooling water conductivity. These casting start-up process parameters are all adjustable. Setting and adjusting the casting start-up process parameters is common knowledge known to those skilled in the art.

[0041] The secondary cooling heat flux refers to the heat flux dissipated from the surface of the ingot when secondary cooling water sprays onto it, and its unit is kw / m². 2 That is, kilowatts per square meter.

[0042] The continuous trend data of secondary cooling heat flux refers to a data sequence of secondary cooling heat flux. In this embodiment, the data sequence is sorted according to the corresponding casting length.

[0043] S2. Based on the "continuous trend data of secondary cooling heat flux on the surface of the ingot during the casting start-up stage", draw a trend diagram of secondary cooling heat flux during the casting start-up stage.

[0044] The secondary cooling heat flux trend diagram is essentially a two-dimensional coordinate diagram. The horizontal dimension of the secondary cooling heat flux trend diagram is the casting length, and the vertical dimension of the secondary cooling heat flux trend diagram is the secondary cooling heat flux. A trend line is drawn on the two-dimensional coordinate diagram, which represents "the trend of secondary cooling heat flux with casting length during the initial casting stage".

[0045] S3. Compare the secondary cooling heat flux trend diagram with the preset "anti-cold leakage heat flux trend range" to determine whether the trend line in the secondary cooling heat flux trend diagram is within the anti-cold leakage heat flux trend range. If yes, it is determined that the preset casting process parameters will not cause cold leakage in the ingot; otherwise, it is determined that the preset casting process parameters will cause cold leakage in the ingot.

[0046] The "anti-cooling heat leakage flux trend range" is stored in data form in a production database based on a network server. The casting production main control computer communicates with the network server via the network. Operators can query and obtain the anti-cooling heat leakage flux trend range by sending relevant production process data as keywords to the network server through the casting production main control computer. In this embodiment, the relevant production process data includes alloy grade, ingot size specifications, and the number of secondary cooling water nozzles. The alloy grade corresponds to the alloy composition in the ingot, and the number of secondary cooling water nozzles is proportional to the ingot size specifications. When the spacing of the secondary cooling water nozzles is consistent, the larger the ingot size specifications, the more secondary cooling water nozzles there are, and correspondingly, the greater the flow rate of secondary cooling water acting on the ingot surface.

[0047] The phrase “S1, calculate the continuous trend data of secondary cooling heat flux on the surface of the ingot during the casting stage according to the preset casting process parameters” specifically includes S11 to S13.

[0048] S11, the casting length is divided into n equal length intervals, where the i-th length interval is (i-1)×l0 to i×l0. n is a natural number; i is a natural number, and i≤n; l0 is the length of a single length interval.

[0049] In this embodiment, the initial casting length is 500mm, and n=500. The 500mm initial casting length is divided into 500 equal length intervals. The length l0 of a single length interval is 1mm. The 500 equal length intervals are 0mm to 1mm, 1mm to 2mm, 2mm to 3mm, ..., 498mm to 499mm, and 499mm to 500mm, respectively.

[0050] S12, for each of the n length intervals, calculate the secondary cooling heat flux Q data corresponding to that length interval.

[0051] S13, the calculated secondary cooling heat flux Q data corresponding to all n length intervals are arranged and combined according to the order of the corresponding length intervals (i.e. the corresponding casting lengths) to obtain the continuous trend data of the secondary cooling heat flux.

[0052] The phrase “S12, for each of the n length intervals, calculate the secondary cooling heat flux Q data corresponding to that length interval” specifically includes S121 to S123.

[0053] S121, Calculate the ingot surface area movement rate L corresponding to the length interval. S (Unit: m) 2 / h, square meters per hour). The ingot surface area moving rate L S According to formula L S = (2W + 2T)·60S y The calculation yields the following formula: W is the ingot width (unit: m), T is the ingot thickness (unit: m), and S... y The casting speed (unit: m / min) corresponds to the length range.

[0054] The ingot surface area movement rate refers to the ingot surface area that moves through a fixed cross-section per unit time when the ingot moves downward.

[0055] S122, Calculate the heat flux Q of the secondary cooling water heating and dissipation corresponding to the length interval. a Secondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c .

[0056] The heat flux Q of the secondary cooling water for heating and heat dissipation a This refers to the heat flux dissipated from the ingot surface due to the temperature rise of the secondary cooling water when the secondary cooling water sprays onto the ingot surface for cooling; its unit is kW / m². 2 That is, kilowatts per square meter. The heat flux Q of the cooling water during heating is... a According to formula Q a =(100-T) W )·S W ·F / 3600 / L S The calculation shows that, in the formula, T W S represents the secondary cooling water temperature (unit: °C). W The specific heat capacity of the secondary cooling water is given by (unit: kJ / (kg·K), kilojoules per kilogram Kelvin), and F is the secondary cooling water flow rate corresponding to the given length range (unit: m). 3 / h, cubic meters per hour), L SThe ingot surface area movement rate corresponding to the aforementioned length range (unit: m) 2 / h, square meters per hour).

[0057] The heat flux Q from the vaporization of the secondary cooling water b This refers to the heat flux dissipated from the ingot surface due to the vaporization of the secondary cooling water during spray cooling of the ingot surface, and its unit is kW / m². 2 That is, kilowatts per square meter. The heat flux Q from the vaporization of the secondary cooling water... b According to formula Q b =H·F·A / 3600 / L S The calculation yields the following result: In the formula, H is the heat of vaporization of the secondary cooling water (unit: KJ / Kg, kilojoules per kilogram), and F is the secondary cooling water flow rate corresponding to the stated length interval (unit: m³ / s). 3 / h (cubic meters per hour), A is the vaporization ratio of secondary cooling water, which is an empirical value, ranging from 0.3 to 0.7. L S The ingot surface area movement rate corresponding to the aforementioned length range (unit: m) 2 / h, square meters per hour).

[0058] The heat flux Q from scaling in the secondary cooling water c This refers to the heat flux dissipated from the ingot surface due to the chemical reaction between trace elements in the secondary cooling water, resulting in scaling, when the secondary cooling water sprays and cools the ingot surface. Its unit is kw / m². 2 That is, kilowatts per square meter. The heat flux Q from scaling in the secondary cooling water system is... c According to formula Q c =7.82E D ·F / 3600 / L S The calculation shows that, in the formula, E D Where is the conductivity of the secondary cooling water (unit: S / m, Siemens per meter), and F is the secondary cooling water flow rate (unit: m³) corresponding to the stated length range. 3 / h, cubic meters per hour), L S The ingot surface area movement rate corresponding to the aforementioned length range (unit: m) 2 / h, square meters per hour).

[0059] S123, heat flux Q of the secondary cooling water is increased by heating. a Secondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c The sum is the secondary cooling heat flux Q corresponding to the length interval, that is, Q = Q a +Q b +Q c .

[0060] It should be noted that all data "corresponding to the length range" mentioned in this article refers to data "when the casting length reaches the specified length range". Specifically: the secondary cooling heat flux corresponding to the length range refers to the secondary cooling heat flux when the casting length reaches the specified length range. The ingot surface area movement rate corresponding to the length range refers to the ingot surface area movement rate when the casting length reaches the specified length range. The secondary cooling water heating and heat dissipation heat flux corresponding to the length range refers to the secondary cooling water heating and heat dissipation heat flux when the casting length reaches the specified length range. The secondary cooling water vaporization heat dissipation heat flux corresponding to the length range refers to the secondary cooling water vaporization heat dissipation heat flux when the casting length reaches the specified length range. The secondary cooling water scaling heat dissipation heat flux corresponding to the length range refers to the secondary cooling water scaling heat dissipation heat flux when the casting length reaches the specified length range.

[0061] It should be noted that the cold leakage pre-judgment method in this embodiment is programmed into the casting production main control computer, and this method is specifically implemented by the casting production main control computer. Before each casting of an aluminum alloy ingot of a certain specification, the operator first presets the casting process parameters for that specification of aluminum alloy ingot based on experience. Then, the operator inputs the preset casting process parameters into the casting production main control computer. The casting production main control computer uses the aforementioned cold leakage pre-judgment method to pre-determine whether "the preset casting process parameters will cause cold leakage in the ingot". If the determination is yes, the operator readjusts the casting process parameters and repeats the above process until it is determined that "the preset casting process parameters will not cause cold leakage in the ingot". Then, the operator inputs the final preset casting process parameters into the casting production main control computer, and the casting production main control computer controls the semi-continuous casting machine to start casting according to these casting process parameters.

[0062] See Figure 2 and Figure 3 , Figure 2 and Figure 3 This is a chart showing the secondary cooling heat flux trend when the cold leakage pre-judgment method of this embodiment is used twice during actual production, before casting an aluminum alloy ingot of a certain specification. Figure 2 This is the first plot of the secondary cooling heat flux trend. Figure 3 This is the second plot of the secondary cooling heat flux trend. The gray area in the plot represents the "heat flux trend range for preventing cooling leakage".

[0063] See Figure 2The first secondary cooling heat flux trend diagram is drawn: Based on experience, the operators first set the casting process parameters for the aluminum alloy ingot of this specification in advance. The operators input the pre-set casting process parameters into the casting production main control computer. The casting production main control computer draws the secondary cooling heat flux trend diagram for the first time based on the casting process parameters. The trend line in the diagram exceeds the heat flux trend range for preventing cold leakage. Therefore, it is determined that the pre-set casting process parameters will cause cold leakage in the ingot. Therefore, it is necessary to readjust the casting process parameters.

[0064] See Figure 3 The second secondary cooling heat flux trend diagram is drawn: Based on the first secondary cooling heat flux trend diagram, the operators readjust the casting process parameters and then input the adjusted casting process parameters into the casting production main control computer again. The casting production main control computer draws the secondary cooling heat flux trend diagram a second time based on the adjusted casting process parameters. The trend line in the diagram is within the heat flux trend range for preventing cold leakage. Therefore, it is determined that the adjusted casting process parameters will not cause cold leakage in the ingot, and the casting can be carried out using the adjusted casting process parameters.

[0065] Finally, the operators input the adjusted casting process parameters into the casting production main control computer, which then controls the semi-continuous casting machine to start casting based on these parameters.

[0066] The cold leakage pre-judgment method of this embodiment has the following advantages: It accurately calculates the continuous trend data of secondary cooling heat flux on the ingot surface during the casting stage based on pre-set casting process parameters. A secondary cooling heat flux trend graph is then plotted based on this data. This graph is compared with the cold leakage prevention heat flux trend range to determine whether the trend line in the secondary cooling heat flux trend graph falls within the cold leakage prevention heat flux trend range. This allows for precise determination of whether the pre-set casting process parameters will cause cold leakage in the ingot. Using this cold leakage pre-judgment method, operators can precisely adjust the casting process parameters before casting aluminum alloy ingots, effectively preventing cold leakage and improving the stability and efficiency of semi-continuous casting machine production, thereby enhancing the quality of aluminum alloy ingots.

[0067] It should be noted that the term "secondary cooling water" mentioned in this article is short for "secondary cooling water," and the two have the same meaning.

[0068] In other embodiments, the cold leakage pre-determination method of the present invention can also be used in the semi-continuous casting of other metal ingots, such as magnesium, copper, nickel, chromium, etc.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for pre-judging cold leakage in semi-continuous casting ingots, characterized in that: The cold leakage pre-determination method includes: S1, based on the pre-set casting process parameters, calculate the continuous trend data of the secondary cooling heat flux on the surface of the ingot during the casting stage; S2, Based on the continuous trend data of the secondary cooling heat flux, draw a trend diagram of the secondary cooling heat flux; S3. Compare the secondary cooling heat flux trend diagram with the preset anti-cold leakage heat flux trend range, and determine whether the trend line in the secondary cooling heat flux trend diagram is within the anti-cold leakage heat flux trend range. If yes, it is determined that the preset casting process parameters will not cause cold leakage in the ingot; otherwise, it is determined that the preset casting process parameters will cause cold leakage in the ingot. S1 includes: S11, divide the casting length into n equal length intervals; S12, For each length interval, calculate the secondary cooling heat flux Q corresponding to that length interval; S13, Arrange and combine all the calculated secondary cooling heat flux Q data according to the order of their corresponding length intervals to obtain the continuous trend data of the secondary cooling heat flux; S12 includes: S121, Calculate the ingot surface area movement rate L corresponding to the length interval. S ; S122, Calculate the heat flux Q of the secondary cooling water heating and dissipation corresponding to the length interval. a Secondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c ; S123, heat flux Q of the secondary cooling water is increased by heating. a Secondary cooling water vaporization heat flux Q b Heat flux Q from scale buildup in secondary cooling water c The sum is taken as the secondary cooling heat flux Q corresponding to the length interval; The ingot surface area moving rate L S According to formula L S =(2W+2T)∙60S y The calculation yields the following formula: where W is the ingot width, T is the ingot thickness, and S... y This refers to the casting speed corresponding to the length range.

2. The method for pre-judging cold leakage of semi-continuous casting ingots according to claim 1, characterized in that: The heat flux Q of the secondary cooling water for heating and heat dissipation a According to formula Q a =(100-T W )∙S W ∙F / 3600 / L S The calculation shows that, in the formula, T W S represents the secondary cooling water temperature. W Let L be the specific heat capacity of the secondary cooling water, F be the secondary cooling water flow rate corresponding to the length range, and L be the flow rate. S The ingot surface area movement rate corresponding to the length range; The heat flux Q from the vaporization of the secondary cooling water b According to formula Q b =H∙F∙A / 3600 / L S The calculation yields the following result: In the formula, H is the heat of vaporization of the secondary cooling water, F is the flow rate of the secondary cooling water corresponding to the length interval, A is the vaporization ratio of the secondary cooling water, and L... S The ingot surface area movement rate corresponding to the length range; The heat flux Q from scaling in the secondary cooling water c According to formula Q c =7.82E D ∙F / 3600 / L S The calculation shows that, in the formula, E D Where L is the conductivity of the secondary cooling water, F is the secondary cooling water flow rate corresponding to the length interval, and L is the conductivity of the secondary cooling water. S The ingot surface area movement rate corresponding to the length range.

3. The method for pre-judging cold leakage of semi-continuous casting ingots according to claim 1, characterized in that: The casting process parameters include casting speed, secondary cooling water flow rate, secondary cooling water temperature, and secondary cooling water conductivity.

4. The method for pre-judging cold leakage of semi-continuous casting ingots according to claim 1, characterized in that: The ingot is an aluminum alloy ingot, copper ingot, magnesium alloy ingot, nickel ingot, or chromium ingot.

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