On-line monitoring method and device for slab crystallizer taper

Abstract

The present invention provides a method and device for online monitoring of the taper of a slab crystallizer, comprising the following steps: calculating the heat flux percentages of the left side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, and calculating the heat flux percentages of the right side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface; calculating the average value of the heat flux percentages of the left side of the narrow copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface, and calculating the average value of the heat flux percentages of the right side of the narrow copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface; taking the sum of the first heat flux percentage average and the second heat flux percentage average as the crystallizer taper monitoring judgment value; based on the preset taper standard value range, generating a crystallizer taper monitoring result according to the crystallizer taper monitoring judgment value. The present invention can solve the current problems such as the lack of an effective technology for online monitoring of the taper of the crystallizer.

Description

Technical Field

[0001] The present invention relates to the technical field of iron and steel metallurgy, and more specifically, to an online monitoring method and device for the taper of a slab crystallizer. Background Art

[0002] During the continuous casting of molten steel, the molten steel solidifies in the crystallizer to form a shell of a certain thickness. When the overheated molten steel changes from liquid to solid, there are thermal shrinkage phenomena such as liquid contraction, solidification contraction and solid phase contraction. In order to adapt to the thermal contraction of the molten steel when it solidifies in the crystallizer, the inner cavity of the crystallizer needs to maintain a certain inverted taper (the size of the lower mouth of the crystallizer is slightly smaller than the section of the upper mouth). The crystallizer taper is very important for continuous casting operation, production progress and billet quality control. The appropriate crystallizer taper can reduce the air gap between the billet shell and the crystallizer copper plate, ensure uniform cooling of the billet, improve the surface quality of the billet, and prevent the billet from cracking or even steel leakage. If the crystallizer taper is too small, the air gap between the billet and the crystallization copper plate is large, which weakens the heat transfer between the billet and the crystallizer, the billet shell is thin and grows unevenly, which restricts the increase of the drawing speed; if the crystallizer taper is too large, the billet is prone to surface longitudinal crack defects, and at the same time, it will increase the billet drawing resistance and the wear of the crystallizer wall. In severe cases, the billet shell will be torn, causing steel leakage.

[0003] In the actual production process, in order to avoid the influence of the taper of the crystallizer on the continuous casting production, the taper of the crystallizer is generally adjusted to the appropriate range after the installation of the crystallizer, and then the taper of the crystallizer is no longer adjusted to ensure that the taper of the crystallizer will not have the above-mentioned influence on the continuous casting production process. However, with the use and wear of the crystallizer copper plate, the taper of the crystallizer adjusted during installation may still be too large or too small after repeated use, thus affecting production.

[0004] Therefore, there is currently a lack of a technology that can monitor the taper of the crystallizer online, so that the taper changes of the crystallizer caused by copper plate wear and other reasons can be discovered in time, so that the taper can be adjusted in time to ensure production at a suitable crystallizer taper, so as to achieve uniform heat transfer of the ingot, improve the quality of the ingot, and ensure smooth production. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a method and device for online monitoring of the taper of a slab crystallizer, so as to solve the problem in the prior art that there is a lack of an effective technology for online monitoring of the taper of a crystallizer, so as to be able to promptly detect taper changes in the crystallizer caused by copper plate wear and other reasons, so that the taper can be adjusted in time to ensure production at a suitable crystallizer taper, so as to achieve uniform heat transfer of the ingot, improve the quality of the ingot, and ensure smooth production.

[0006] The present invention provides a method for online monitoring of the taper of a slab crystallizer, comprising the following steps:

[0007] S1. Collect the water temperature data and water flow data of the crystallizer; wherein,

[0008] The water temperature data include: the cooling water inlet temperature of the crystallizer, the left water outlet temperature of the narrow copper plate surface of the crystallizer, the right water outlet temperature of the narrow copper plate surface of the crystallizer, the inner arc side water outlet temperature of the wide copper plate surface of the crystallizer, and the outer arc side water outlet temperature of the wide copper plate surface of the crystallizer;

[0009] The water flow data includes: the water flow on the left side of the narrow copper plate surface of the crystallizer, the water flow on the right side of the narrow copper plate surface of the crystallizer, the water flow on the inner arc side of the wide copper plate surface of the crystallizer, and the water flow on the outer arc side of the wide copper plate surface of the crystallizer;

[0010] S2. According to the water temperature data and the water flow data, a preset heat flux percentage formula is used to calculate the heat flux percentages of the left side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, and the heat flux percentages of the right side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface;

[0011] S3. According to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, the average value of the heat flux percentages of the left side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the first heat flux percentage average value, and according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, the average value of the heat flux percentages of the right side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the second heat flux percentage average value;

[0012] S4, taking the sum of the first heat flux percentage average and the second heat flux percentage average as a mold taper monitoring determination value;

[0013] S5. Based on a preset taper standard value range, a mold taper monitoring result is generated according to the mold taper monitoring judgment value.

[0014] In addition, a preferred solution is that the collecting of water temperature data and water flow data of the crystallizer includes: periodically collecting water temperature data and water flow data from the PLC of the on-site production line according to a preset time period.

[0015] In addition, a preferred solution is that in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0016] When calculating the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the inner arc side of the wide side, the expression of the preset heat flux percentage formula is:

[0017] in,

[0018] K LF W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

[0019] In addition, a preferred solution is that in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0020] When calculating the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side, the expression of the preset heat flux percentage formula is:

[0021] in,

[0022] K LB W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

[0023] In addition, a preferred solution is that in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0024] When calculating the percentage of the heat flux on the right side of the narrow side of the copper plate of the crystallizer to the heat flux on the inner arc side of the wide side, the expression of the preset heat flux percentage formula is:

[0025] in,

[0026] K RF W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T R-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

[0027] In addition, a preferred solution is that in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0028] When calculating the percentage of the heat flux on the right side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side, the expression of the preset heat flux percentage formula is:

[0029] in,

[0030] K RB W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T R-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

[0031] In addition, a preferred solution is that the calculation formula for the first heat flux percentage mean is:

[0032] in,

[0033] KLAVG is the first heat flux percentage mean, K LF K is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, LB It is the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side.

[0034] The calculation formula of the second heat flux percentage mean is:

[0035] in,

[0036] K RAVG is the second heat flux percentage mean, K RF K is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, RB It is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface.

[0037] In addition, a preferred solution is that the method for obtaining the preset taper standard value range includes:

[0038] Collect the current casting speed of the continuous casting machine when the crystallizer is working;

[0039] According to the current billet drawing speed, the standard basic value of the taper of the crystallizer is calculated using the standard basic value calculation formula of the taper; wherein the standard basic value calculation formula of the taper is:

[0040] K ∑std =aV 2 +bV+C;

[0041] Among them, K ∑std is the standard basic value of the taper, v is the current casting speed of the continuous casting machine, a, b, c are empirical parameters, which are set according to the steel type of the casting;

[0042] According to the taper standard basic value and the preset empirical proportional coefficient, the preset taper standard value range is calculated; wherein the minimum taper standard value of the preset taper standard value range is k1*K ∑std ; The maximum taper standard value of the preset taper standard value range is k2*K ∑std ; Among them, k1 and k2 are preset empirical proportional coefficients, which are set according to the casting speed of the continuous casting machine.

[0043] In addition, a preferred solution is that the generating of the mold taper monitoring result according to the mold taper monitoring determination value based on the preset taper standard value range includes:

[0044] Comparing the mold taper monitoring determination value with a preset taper standard value range;

[0045] When the mold taper monitoring judgment value is greater than or equal to the minimum taper standard value of the preset taper standard value range, and less than or equal to the maximum taper standard value of the preset taper standard value range, a monitoring result of the appropriate taper of the mold is generated;

[0046] When the mold taper monitoring judgment value is greater than the maximum taper standard value of the preset taper standard value range or less than the minimum taper standard value of the preset taper standard value range, a monitoring result indicating that the taper of the mold is inappropriate is generated.

[0047] The present invention provides an online monitoring device for the taper of a slab crystallizer, comprising a data acquisition module, a calculation module, an average value acquisition module, a judgment value generation module and a result generation module; wherein:

[0048] The data acquisition module is used to collect the water temperature data and water flow data of the crystallizer; wherein,

[0049] The water temperature data include: the cooling water inlet temperature of the crystallizer, the left water outlet temperature of the narrow copper plate surface of the crystallizer, the right water outlet temperature of the narrow copper plate surface of the crystallizer, the inner arc side water outlet temperature of the wide copper plate surface of the crystallizer, and the outer arc side water outlet temperature of the wide copper plate surface of the crystallizer;

[0050] The water flow data includes: the water flow on the left side of the narrow copper plate surface of the crystallizer, the water flow on the right side of the narrow copper plate surface of the crystallizer, the water flow on the inner arc side of the wide copper plate surface of the crystallizer, and the water flow on the outer arc side of the wide copper plate surface of the crystallizer;

[0051] A calculation module, for calculating the heat flux percentages of the left side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, and calculating the heat flux percentages of the right side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, according to the water temperature data and the water flow data, using a preset heat flux percentage formula;

[0052] an average value acquisition module, for calculating the average value of the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a first heat flux percentage average value, and for calculating the average value of the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a second heat flux percentage average value;

[0053] A determination value generating module, configured to use the sum of the first heat flux percentage average value and the second heat flux percentage average value as a crystallizer taper monitoring determination value;

[0054] The result generating module is used to generate a mold taper monitoring result according to the mold taper monitoring judgment value based on a preset taper standard value range.

[0055] It can be seen from the above technical scheme that the online monitoring method and device for the taper of the slab crystallizer provided by the present invention collects the water temperature data and water flow data of the crystallizer online in real time, and comprehensively calculates the ratio of the heat flux percentage between the narrow surface of the copper plate and the wide surface of the copper plate of the crystallizer, thereby realizing real-time monitoring of the taper of the crystallizer, and the judgment accuracy of the crystallizer taper monitoring judgment value obtained is higher, and the judgment result is submitted to the relevant production technicians in time, so as to take corresponding disposal measures in time, avoid the occurrence of casting quality problems, and ensure smooth production.

[0056] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0058] Figure 1 It is a schematic diagram of a process of an online monitoring method of a slab crystallizer taper according to an embodiment of the present invention;

[0059] Figure 2 4 is a logic principle diagram of a method for online monitoring of slab crystallizer taper according to an embodiment of the present invention.

[0060] The same reference numerals in the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0061] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0062] In view of the aforementioned problem that in the prior art there is a lack of an effective technology for online monitoring of the taper of the crystallizer, so as to promptly detect the taper changes of the crystallizer caused by copper plate wear and other reasons, thereby being able to make timely taper adjustments to ensure production at a suitable crystallizer taper, thereby achieving uniform heat transfer of the ingot, improving the quality of the ingot, and ensuring smooth production, a method and device for online monitoring of the taper of a slab crystallizer are proposed.

[0063] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0064] In order to illustrate the on-line monitoring method and device of slab crystallizer taper provided by the present invention, Figure 1 The flow chart of the method for online monitoring the taper of a slab crystallizer according to an embodiment of the present invention is shown; Figure 2 The logical principle of the on-line monitoring method of the slab crystallizer taper according to an embodiment of the present invention is shown.

[0065] like Figure 1 Combination Figure 2 As shown together, the method for online monitoring of slab crystallizer taper provided by the present invention comprises the following steps:

[0066] S1. Collect the water temperature data and water flow data of the crystallizer.

[0067] The water temperature data include: the cooling water inlet temperature of the crystallizer, the water outlet temperature on the left side of the narrow copper plate of the crystallizer, the water outlet temperature on the right side of the narrow copper plate of the crystallizer, the water outlet temperature on the inner arc side of the wide copper plate of the crystallizer, and the water outlet temperature on the outer arc side of the wide copper plate of the crystallizer.

[0068] The water flow data include: the water flow on the left side of the narrow copper plate surface of the crystallizer, the water flow on the right side of the narrow copper plate surface of the crystallizer, the water flow on the inner arc side of the wide copper plate surface of the crystallizer, and the water flow on the outer arc side of the wide copper plate surface of the crystallizer.

[0069] As a preferred solution of the present invention, collecting the water temperature data and water flow data of the crystallizer includes: periodically collecting the water temperature data and water flow data from the PLC of the on-site production line according to a preset time period. The data can be periodically collected according to the preset time period according to actual production needs, for example, collecting data once every 1 minute and performing a calculation once.

[0070] S2. According to the water temperature data and the water flow data, the preset heat flux percentage formula is used to calculate the heat flux percentage of the left side of the narrow copper plate of the crystallizer with the heat flux percentage of the inner arc side of the wide surface and the outer arc side of the wide surface, and the heat flux percentage of the right side of the narrow copper plate of the crystallizer with the heat flux percentage of the inner arc side of the wide surface and the outer arc side of the wide surface.

[0071] As a preferred embodiment of the present invention, in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0072] When calculating the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, the expression of the preset heat flux percentage formula is:

[0073] in,

[0074] K LF W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

[0075] As a preferred embodiment of the present invention, in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0076] When calculating the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side, the expression of the preset heat flux percentage formula is:

[0077] in,

[0078] K LB W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

[0079] As a preferred embodiment of the present invention, in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0080] When calculating the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, the expression of the preset heat flux percentage formula is:

[0081] in,

[0082] KRF W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T R-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

[0083] As a preferred embodiment of the present invention, in the process of using a preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side,

[0084] When calculating the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, the expression of the preset heat flux percentage formula is:

[0085] in,

[0086] K RB W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T R-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

[0087] The general formula for the preset heat flux percentage formula is:

[0088]

[0089] In the formula, K ij Refers to the heat flux percentage between the narrow side and the wide side of the copper plate of the crystallizer, Q i is the crystallizer water flow rate on the narrow side i of the copper plate of the crystallizer (i represents the left or right side of the narrow side), T i-out is the crystallizer outlet water temperature on the narrow side i of the copper plate of the crystallizer (i represents the left or right side of the narrow side), Q jis the water flow rate of the crystallizer on the j side of the copper plate wide surface of the crystallizer (j represents the inner arc side or outer arc side of the wide surface), T j-out is the crystallizer water outlet temperature on the j side of the copper plate wide surface of the crystallizer (j represents the inner arc side or outer arc side of the wide surface), T in It is the inlet temperature of cooling water for the crystallizer.

[0090] S3. According to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer with the inner arc side of the wide surface and the outer arc side of the wide surface, the average value of the heat flux percentages of the left side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the first heat flux percentage average value; and according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer with the inner arc side of the wide surface and the outer arc side of the wide surface, the average value of the heat flux percentages of the right side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the second heat flux percentage average value.

[0091] As a preferred embodiment of the present invention, the calculation formula of the first heat flux percentage mean is:

[0092] in,

[0093] K LAVG is the first heat flux percentage mean, K LF K is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, LB It is the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side.

[0094] The calculation formula for the second heat flux percentage mean is:

[0095] in,

[0096] K RAVG is the second heat flux percentage mean, K RF K is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, RB It is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface.

[0097] The calculation formula of the first heat flux percentage average and the calculation formula of the second heat flux percentage average can use the same general formula, which is as follows:

[0098]

[0099] In the formula, K iAVG Refers to the average percentage of heat flux between the narrow and wide sides of the copper plate of the crystallizer, K iFK is the heat flux percentage between the narrow side i of the copper plate of the crystallizer (i represents the left or right side of the narrow side) and the inner arc side of the wide copper plate of the crystallizer, iB It is the heat flux percentage between the narrow side i of the copper plate of the crystallizer (i represents the left or right side of the narrow side) and the inner arc side of the wide side of the copper plate of the crystallizer.

[0100] S4. The sum of the first heat flux percentage average and the second heat flux percentage average is used as a crystallizer taper monitoring judgment value.

[0101] K ∑LR =K LAVG +K RAVG , for K LAVG and K RAVG The sum is used to obtain the mold taper monitoring judgment value K ∑LR .

[0102] S5. Based on the preset taper standard value range, generate a mold taper monitoring result according to the mold taper monitoring judgment value.

[0103] As a preferred solution of the present invention, a method for obtaining a preset taper standard value range includes:

[0104] Collect the current casting speed of the continuous casting machine when the crystallizer is working;

[0105] According to the current billet drawing speed, the standard basic value of the taper of the crystallizer is calculated using the standard basic value calculation formula of the taper; wherein the standard basic value calculation formula of the taper is:

[0106] K ∑std =aV 2 +bV+C;

[0107] Among them, k ∑std is the standard basic value of the taper, V is the current casting speed of the continuous casting machine, a, b, c are empirical parameters, which are set according to the steel type of the casting;

[0108] According to the taper standard basic value and the preset empirical proportional coefficient, the preset taper standard value range is calculated; among which, the minimum taper standard value of the preset taper standard value range is k1*K ∑std ; The maximum taper standard value of the preset taper standard value range is k2*K ∑std ; Among them, k1 and k2 are preset empirical proportional coefficients, which are set according to the casting speed of the continuous casting machine.

[0109] Specifically, the preset taper standard value range is calculated based on the current casting speed, steel type and empirical parameters of the continuous casting machine. The calculation formula is:

[0110] K ∑std =aV 2 +bV+C;

[0111] Among them, V refers to the current casting speed of the continuous casting machine (unit: m / min), a, b, and c are empirical parameters, which are related to the type of steel. For low carbon steel (C content is less than or equal to 0.25%): a=-0.25, b=7, c=153.25; for medium and high carbon steel (C content is greater than 0.25%): a=-0.25, b=7, c=158.25.

[0112] Compare K ∑LR and K ∑std To determine whether the taper of the slab crystallizer is appropriate online in real time. ∑LR Less than k1*K ∑std (k1 is the empirical proportional coefficient, generally 0.96 to 1.0, the higher the pulling speed, the larger the value), then the taper of the crystallizer is too small and needs to be increased; if K ∑LR Greater than k2*K ∑std (k2 is the empirical proportional coefficient, generally 1.0 to 1.04, the higher the pulling speed, the smaller the value), then the taper of the crystallizer is too large and needs to be reduced. If k1*K ∑std ≤K ∑LR ≤k2*K ∑std , then the mold taper is appropriate. The operator adjusts the unreasonable mold taper in real time according to the judgment result to keep the heat flux of the mold copper plate optimized, ensuring smooth production and qualified casting quality.

[0113] As a preferred solution of the present invention, based on a preset taper standard value range, generating a mold taper monitoring result according to a mold taper monitoring judgment value includes:

[0114] Compare the mold taper monitoring determination value with the preset taper standard value range;

[0115] When the mold taper monitoring judgment value is greater than or equal to the minimum taper standard value of the preset taper standard value range, and less than or equal to the maximum taper standard value of the preset taper standard value range, a suitable monitoring result of the mold taper is generated;

[0116] When the mold taper monitoring judgment value is greater than the maximum taper standard value of the preset taper standard value range or less than the minimum taper standard value of the preset taper standard value range, a monitoring result of inappropriate taper of the mold is generated.

[0117] The slab crystallizer taper online monitoring device provided by the present invention comprises a data acquisition module, a calculation module, an average value acquisition module, a judgment value generation module and a result generation module; wherein,

[0118] The data acquisition module is used to collect the water temperature data and water flow data of the crystallizer; wherein,

[0119] The water temperature data include: the cooling water inlet temperature of the crystallizer, the water outlet temperature on the left side of the narrow copper plate of the crystallizer, the water outlet temperature on the right side of the narrow copper plate of the crystallizer, the water outlet temperature on the inner arc side of the wide copper plate of the crystallizer, and the water outlet temperature on the outer arc side of the wide copper plate of the crystallizer;

[0120] The water flow data includes: the water flow on the left side of the narrow copper plate of the crystallizer, the water flow on the right side of the narrow copper plate of the crystallizer, the water flow on the inner arc side of the wide copper plate of the crystallizer, and the water flow on the outer arc side of the wide copper plate of the crystallizer;

[0121] A calculation module is used to calculate the heat flux percentages of the left side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, and calculate the heat flux percentages of the right side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface according to the water temperature data and the water flow data by using a preset heat flux percentage formula;

[0122] an average value acquisition module, for calculating the average value of the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a first heat flux percentage average value, and for calculating the average value of the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a second heat flux percentage average value;

[0123] A determination value generating module, used for taking the sum of the first heat flux percentage average value and the second heat flux percentage average value as a crystallizer taper monitoring determination value;

[0124] The result generating module is used to generate the mold taper monitoring result according to the mold taper monitoring judgment value based on the preset taper standard value range.

[0125] The following examples will further illustrate the present invention so that those skilled in the art can better understand the advantages and features of the present invention.

[0126] Example 1

[0127] Effective width W of the wide copper plate of the preloaded crystallizer IO =1500mm and the effective width W of the narrow copper plate of the crystallizer LR =100mm; collect the cooling water inlet temperature T of the crystallizer in real time from the on-site production line PLC in , Water flow Q on the inner arc side of the copper plate wide surface of the crystallizer F , Water flow Q on the outer arc side of the copper plate wide surface of the crystallizer B , Water flow Q on the left side of the narrow copper plate of the crystallizer L, the water flow Q on the right side of the narrow copper plate of the crystallizer R , the water outlet temperature T on the inner arc side of the copper plate wide surface of the crystallizer F-out , the water outlet temperature T on the outer arc side of the copper plate wide surface of the crystallizer B-out , the water outlet temperature T on the left side of the narrow copper plate of the crystallizer L-out , the right side water outlet temperature T of the narrow copper plate of the crystallizer R-out , casting speed V (unit: m / min) and casting steel type (low carbon steel or medium-high carbon steel).

[0128] See Table 1 for detailed data.

[0129] Collect data items unit Real-time data Casting steel Mild Steel V m / min 5.2 <![CDATA[T in ]]> ℃ 31.3 <![CDATA[Q F ]]> L / min 5045 <![CDATA[Q B ]]> L / min 4995 <![CDATA[Q L ]]> L / min 301 <![CDATA[Q R ]]> L / min 303 <![CDATA[T F-out ]]> ℃ 43.5 <![CDATA[T B-out ]]> ℃ 43.8 <![CDATA[T L-out ]]> ℃ 44.0 <![CDATA[T R-out ]]> ℃ 43.9

[0130] Table 1

[0131] The preset heat flux percentage formula is used to calculate the side heat flux percentage K of the left side of the narrow copper plate of the crystallizer and the inner arc of the wide surface. LF , the heat flux percentage K of the left side of the narrow copper plate of the crystallizer and the outer arc side of the wide surface LB , the lateral heat flux percentage K between the right side of the narrow copper plate of the crystallizer and the inner arc of the wide surface RF , the heat flux percentage K between the right side of the narrow copper plate of the crystallizer and the outer arc side of the wide copper plate RB .

[0132]

[0133]

[0134]

[0135]

[0136] Calculate the average K of the heat flux percentage of the left side of the narrow surface of the copper plate and the heat flux percentage of the inner and outer arc sides of the wide surface LAVG , that is, the average value of the first heat flux percentage, the average value of the heat flux on the right side of the narrow surface of the copper plate and the heat flux percentage on the inner and outer arc sides of the wide surface K RAVG , which is the second heat flux percentage mean.

[0137]

[0138]

[0139] To K LAVG and K RAVG The sum is used to obtain the mold taper monitoring judgment value K ∑LR for:

[0140] K ∑LR =K LAVG +KRAVG =184.647

[0141] According to the current production conditions, calculate the preset taper standard value range K ∑std ,

[0142] K ∑std =-0.25V 2 +7V+153.25=182.89

[0143] For this embodiment, the drawing speed is 5.2 m / min, which is a high drawing speed. k1 is 0.99, k2 is 1.01, then So 0.99*K ∑std ≤K ∑LR ≤1.01*K ∑std , the current crystallizer taper is appropriate.

[0144] Example 2

[0145] Effective width W of the wide copper plate of the preloaded crystallizer IO =1250mm and the effective width W of the narrow copper plate of the crystallizer LR =210mm; collect the crystallizer cooling water inlet temperature T in real time from the on-site production line PLC in , Water flow Q on the inner arc side of the copper plate wide surface of the crystallizer F , Water flow Q on the outer arc side of the copper plate wide surface of the crystallizer B , Water flow Q on the left side of the narrow copper plate of the crystallizer L , the water flow Q on the right side of the narrow copper plate of the crystallizer R , the water outlet temperature T on the inner arc side of the copper plate wide surface of the crystallizer F-out , the water outlet temperature T on the outer arc side of the copper plate wide surface of the crystallizer B-out , the water outlet temperature T on the left side of the narrow copper plate of the crystallizer L-out , the right side water outlet temperature T of the narrow copper plate of the crystallizer R-out , casting speed V (unit: m / min) and casting steel type (low carbon steel or medium-high carbon steel). Detailed data are shown in Table 2.

[0146]

[0147]

[0148] Table 2

[0149] The preset heat flux percentage formula is used to calculate the side heat flux percentage K of the left side of the narrow copper plate of the crystallizer and the inner arc of the wide surface. LF , the heat flux percentage K of the left side of the narrow copper plate of the crystallizer and the outer arc side of the wide surface LB , the lateral heat flux percentage K between the right side of the narrow copper plate of the crystallizer and the inner arc of the wide surfaceRF , the heat flux percentage K between the right side of the narrow copper plate of the crystallizer and the outer arc side of the wide copper plate RB .

[0150]

[0151]

[0152]

[0153]

[0154] Calculate the average K of the heat flux percentage of the left side of the narrow surface of the copper plate and the heat flux percentage of the inner and outer arc sides of the wide surface LAVG , that is, the average value of the first heat flux percentage, the heat flux on the right side of the narrow surface, and the heat flux percentage on the inner and outer arc sides of the wide surface K RAVG , which is the second heat flux percentage mean.

[0155]

[0156]

[0157] To K LAVG and K RAVG The sum is used to obtain the mold taper monitoring judgment value K ∑LR for:

[0158] K ∑LR =K LAVG +K RAVG =175.92

[0159] Calculate the preset taper standard value range K under current production conditions ∑std for:

[0160] K ∑std =-0.25V 2 +7V+158.25=168.19

[0161] For this embodiment, the drawing speed is 1.5 m / min, which is a conventional drawing speed, k1 is 0.96, k2 is 1.04, then K ∑LR >1.04*K ∑std , the taper of the crystallizer is slightly too large, and the process personnel need to be notified to take measures to slightly reduce the taper.

[0162] It can be seen from the above specific implementation methods that the online monitoring method and device for the slab crystallizer taper provided by the present invention, through online real-time collection of water temperature data and water flow data of the crystallizer, comprehensively calculates the ratio of the heat flux percentage between the narrow copper plate surface and the wide copper plate surface of the crystallizer, thereby realizing real-time monitoring of the crystallizer taper, and the obtained crystallizer taper monitoring judgment value has higher judgment accuracy, and the judgment result is submitted to relevant production technicians in a timely manner, so as to take corresponding disposal measures in time, avoid the occurrence of casting quality problems, and ensure smooth production.

[0163] As described above, the method and device for online monitoring of the taper of a slab crystallizer proposed in the present invention are described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the method and device for online monitoring of the taper of a slab crystallizer proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A method for online monitoring of slab crystallizer taper, characterized in that: The steps include: S1. Collect the water temperature data and water flow data of the crystallizer; wherein, The water temperature data include: the cooling water inlet temperature of the crystallizer, the left water outlet temperature of the narrow copper plate surface of the crystallizer, the right water outlet temperature of the narrow copper plate surface of the crystallizer, the inner arc side water outlet temperature of the wide copper plate surface of the crystallizer, and the outer arc side water outlet temperature of the wide copper plate surface of the crystallizer; The water flow data includes: the water flow on the left side of the narrow copper plate surface of the crystallizer, the water flow on the right side of the narrow copper plate surface of the crystallizer, the water flow on the inner arc side of the wide copper plate surface of the crystallizer, and the water flow on the outer arc side of the wide copper plate surface of the crystallizer; S2. According to the water temperature data and the water flow data, a preset heat flux percentage formula is used to calculate the heat flux percentages of the left side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, and the heat flux percentages of the right side of the narrow copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface; S3. According to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, the average value of the heat flux percentages of the left side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the first heat flux percentage average value, and according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, the average value of the heat flux percentages of the right side of the narrow surface of the copper plate to the inner arc side of the wide surface and the outer arc side of the wide surface is calculated as the second heat flux percentage average value; S4, taking the sum of the first heat flux percentage average and the second heat flux percentage average as a mold taper monitoring determination value; S5. Based on a preset taper standard value range, a mold taper monitoring result is generated according to the mold taper monitoring judgment value; wherein the method for obtaining the preset taper standard value range includes: Collect the current casting speed of the continuous casting machine when the crystallizer is working; According to the current billet drawing speed, the standard basic value of the taper of the crystallizer is calculated using the standard basic value calculation formula of the taper; wherein the standard basic value calculation formula of the taper is: K ∑std =aV 2 +bV+C; Among them, K ∑std is the standard basic value of the taper, V is the current casting speed of the continuous casting machine, a, b, c are empirical parameters, which are set according to the steel type of the casting; According to the taper standard basic value and the preset empirical proportional coefficient, the preset taper standard value range is calculated; wherein the minimum taper standard value of the preset taper standard value range is k1*K ∑std ; The maximum taper standard value of the preset taper standard value range is k2*K ∑std ; Among them, k1 and k2 are preset empirical proportional coefficients, which are set according to the casting speed of the continuous casting machine.

2. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: The collecting of the water temperature data and the water flow data of the crystallizer includes: periodically collecting the water temperature data and the water flow data from the PLC of the on-site production line according to a preset time period.

3. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: In the process of using the preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side, When calculating the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the inner arc side of the wide side, the expression of the preset heat flux percentage formula is: in, K LF W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

4. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: In the process of using the preset heat flux percentage formula to calculate the heat flux percentage of the left side of the narrow side of the copper plate of the crystallizer to the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side, When calculating the percentage of the heat flux on the left side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side, the expression of the preset heat flux percentage formula is: in, K LB W is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, L is the water flow rate on the left side of the narrow copper plate of the crystallizer, T L-out is the water outlet temperature on the left side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

5. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: In the process of using the preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side, When calculating the percentage of the heat flux on the right side of the narrow side of the copper plate of the crystallizer to the heat flux on the inner arc side of the wide side, the expression of the preset heat flux percentage formula is: in, K RF W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T IR-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, F is the water flow rate on the inner arc side of the copper plate wide surface of the crystallizer, T F-out It is the water outlet temperature on the inner arc side of the wide surface of the copper plate of the crystallizer.

6. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: In the process of using the preset heat flux percentage formula to calculate the heat flux percentage of the right side of the narrow side of the copper plate of the crystallizer and the heat flux percentage of the inner arc side of the wide side and the outer arc side of the wide side, When calculating the percentage of the heat flux on the right side of the narrow side of the copper plate of the crystallizer to the heat flux on the outer arc side of the wide side, the expression of the preset heat flux percentage formula is: in, K RB W is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface, IO Q is the effective width of the copper plate wide surface of the crystallizer, R is the water flow rate on the right side of the narrow copper plate of the crystallizer, T R-out is the outlet water temperature on the right side of the narrow copper plate of the crystallizer, T in is the cooling water inlet temperature of the crystallizer, W LR Q is the effective width of the narrow side of the copper plate of the crystallizer, B is the water flow rate on the outer arc side of the copper plate wide surface of the crystallizer, T B-out It is the water outlet temperature on the outer arc side of the wide surface of the copper plate of the crystallizer.

7. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: The calculation formula of the first heat flux percentage mean is: in, K LAVG is the first heat flux percentage mean, K LF K is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, LB is the percentage of the heat flux on the left side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface; The calculation formula of the second heat flux percentage mean is: in, K RAVG is the second heat flux percentage mean, K RF K is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the inner arc side of the wide surface, RB It is the percentage of the heat flux on the right side of the narrow copper plate of the crystallizer to the heat flux on the outer arc side of the wide surface.

8. The method for online monitoring of slab crystallizer taper according to claim 1, characterized in that: The step of generating a mold taper monitoring result based on a preset taper standard value range and according to the mold taper monitoring determination value comprises: Comparing the mold taper monitoring determination value with a preset taper standard value range; When the mold taper monitoring judgment value is greater than or equal to the minimum taper standard value of the preset taper standard value range, and less than or equal to the maximum taper standard value of the preset taper standard value range, a monitoring result of the appropriate taper of the mold is generated; When the mold taper monitoring judgment value is greater than the maximum taper standard value of the preset taper standard value range or less than the minimum taper standard value of the preset taper standard value range, a monitoring result indicating that the taper of the mold is inappropriate is generated.

9. An online monitoring device for the taper of a slab crystallizer, characterized in that: It includes a data acquisition module, a calculation module, an average value acquisition module, a judgment value generation module and a result generation module; wherein, The data acquisition module is used to collect the water temperature data and water flow data of the crystallizer; wherein, The water temperature data include: the cooling water inlet temperature of the crystallizer, the left water outlet temperature of the narrow copper plate surface of the crystallizer, the right water outlet temperature of the narrow copper plate surface of the crystallizer, the inner arc side water outlet temperature of the wide copper plate surface of the crystallizer, and the outer arc side water outlet temperature of the wide copper plate surface of the crystallizer; The water flow data includes: the water flow on the left side of the narrow copper plate surface of the crystallizer, the water flow on the right side of the narrow copper plate surface of the crystallizer, the water flow on the inner arc side of the wide copper plate surface of the crystallizer, and the water flow on the outer arc side of the wide copper plate surface of the crystallizer; A calculation module, for calculating the heat flux percentages of the left side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, and calculating the heat flux percentages of the right side of the narrow copper surface of the crystallizer and the inner arc side of the wide surface and the outer arc side of the wide surface, respectively, according to the water temperature data and the water flow data, using a preset heat flux percentage formula; an average value acquisition module, for calculating the average value of the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the left side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a first heat flux percentage average value, and for calculating the average value of the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface according to the heat flux percentages of the right side of the narrow surface of the copper plate of the crystallizer to the inner arc side of the wide surface and the outer arc side of the wide surface, as a second heat flux percentage average value; A determination value generating module, configured to use the sum of the first heat flux percentage average value and the second heat flux percentage average value as a crystallizer taper monitoring determination value; A result generating module is used to generate a mold taper monitoring result according to the mold taper monitoring judgment value based on a preset taper standard value range; wherein the method for obtaining the preset taper standard value range includes: Collect the current casting speed of the continuous casting machine when the crystallizer is working; According to the current billet drawing speed, the standard basic value of the taper of the crystallizer is calculated using the standard basic value calculation formula of the taper; wherein the standard basic value calculation formula of the taper is: K ∑std =aV 2 +bV+C; Among them, K ∑std is the standard basic value of the taper, V is the current casting speed of the continuous casting machine, a, b, c are empirical parameters, which are set according to the steel type of the casting; According to the taper standard basic value and the preset empirical proportional coefficient, the preset taper standard value range is calculated; wherein the minimum taper standard value of the preset taper standard value range is k1*K ∑std ; The maximum taper standard value of the preset taper standard value range is k2*K ∑std ; Among them, k1 and k2 are preset empirical proportional coefficients, which are set according to the casting speed of the continuous casting machine.

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