Method and device for detecting carbon content in converter, storage medium, and electronic device

Abstract

The present application discloses a method and device for detecting the carbon content of a converter, a storage medium, and an electronic device. The method includes: determining the flue gas analysis lag time of the converter's flue gas analysis system, wherein the flue gas analysis system is used to detect the flue gas components of the converter; determining the sub-gun carbon measurement lag time of the converter's sub-gun for measuring the carbon content of the molten pool; determining the target measurement time based on the flue gas analysis lag time and the sub-gun carbon measurement lag time; starting from the target measurement time, determining the detected carbon content of the converter's output molten pool according to a preset frequency and a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas components, and steel output. This method solves the problem that the method of detecting carbon content in the related art has large errors and cannot meet the needs of production scenarios with smaller errors.

Description

Technical Field

[0001] The present application relates to the field of converter steelmaking, and specifically to a method and device for detecting the carbon content of a converter, a storage medium, and an electronic device. Background Art

[0002] Accurately predicting the endpoint carbon content of converter smelting is crucial for improving converter efficiency, reducing production costs, and improving product quality. Currently, the most common semi-dynamic model used in converter smelting is based on auxiliary lance detection. This model uses an auxiliary lance to monitor the melt pool temperature and carbon content when the total oxygen level in the converter is 85%. The model then calculates the oxygen flow required to reach the target endpoint carbon content based on a thermodynamic model. This makes it difficult to achieve real-time prediction of the carbon content in the melt pool.

[0003] In recent years, flue gas analysis technology has been gradually applied to converter smelting control. Chinese Patent CN111518980A discloses a correction method and system for a converter endpoint carbon content prediction model, Chinese Patent CN108647407A discloses a method for determining carbon content through converter steelmaking flue gas analysis, and Chinese Patent CN113512622A discloses a method for dynamically controlling the endpoint carbon content of the converter smelting process based on gas analysis. These methods primarily rely on the carbon mass conservation principle to establish a model that dynamically predicts changes in the converter bath carbon content, based on the changes in CO and CO₂ content in the flue gas during converter smelting. However, in actual production, due to large fluctuations in raw material conditions, such as the composition and weight of added scrap steel, the weight of the incoming hot metal, and the composition of added lime, a model based solely on the carbon mass conservation principle cannot meet the target carbon content control at the converter endpoint. For example, for a 120-ton converter, a deviation of 1 ton in the incoming hot metal weight can result in a 0.04% deviation in the converter endpoint carbon content, making it unsuitable for practical application.

[0004] The method of detecting carbon content in related technologies has large errors and cannot meet the needs of production scenarios with smaller errors. No effective solution has been proposed yet. Summary of the Invention

[0005] The main purpose of this application is to provide a method and device for detecting the carbon content of a converter, a storage medium, and an electronic device, so as to solve the problem that the method of detecting the carbon content in the related art has large errors and cannot meet the production scenarios with smaller errors.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for detecting the carbon content of a converter is provided, comprising: determining the flue gas analysis lag time of the flue gas analysis system of the converter, wherein the flue gas analysis system is used to detect the flue gas components of the converter; determining the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool; determining a target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; starting from the target measurement time, determining the detected carbon content of the output molten pool of the converter according to a preset frequency and a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas components and steel output.

[0007] Optionally, determining the flue gas analysis lag time of the converter's flue gas analysis system includes: when the oxygen blowing flow rate of the converter's oxygen lance reaches a preset proportion of the set value, recording the current time as the converter's start smelting time; when the nitrogen content in the flue gas components detected by the flue gas analysis system decreases and the carbon oxide content increases, recording the current time as the converter's start analysis time; determining the flue gas analysis lag time based on the converter's start smelting time and the converter's start analysis time.

[0008] Optionally, determining the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool includes: controlling the auxiliary gun to extend into the converter's molten pool to measure the temperature and carbon content of the molten pool based on the flue gas composition satisfying preset conditions; when the auxiliary gun measures the temperature of the molten pool, recording the current time as the temperature appearance time; when the auxiliary gun measures the carbon content of the molten pool, recording the current time as the carbon content appearance time, wherein the carbon content appearance time is later than the temperature appearance time; determining the auxiliary gun carbon measurement lag time based on the temperature appearance time and the carbon content appearance time.

[0009] Optionally, determining the target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time includes: determining the target delay time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; determining the target measurement time according to the starting time when the auxiliary gun detects the temperature of the molten pool, and the target delay time.

[0010] Optionally, before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method also includes: determining the nitrogen content used for nitrogen sealing and the inert gas content used for blowing into the converter in the flue gas components; obtaining the nitrogen sealing flow rate and blowing flow rate during the operation of the converter; and determining the real-time flow rate of the flue gas based on the nitrogen content, nitrogen sealing flow rate, the inert gas content and blowing flow rate.

[0011] Optionally, before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method also includes: determining the steel input amount of the converter according to various types of steel materials input into the converter; obtaining the steel material consumption index of the converter; and determining the steel output of the converter according to the steel input amount and the steel material consumption index.

[0012] Optionally, determining the detected carbon content of the output molten pool of the converter according to a preset formula includes: determining the carbon content of the molten pool at the previous moment, and the content of various carbon oxides in the flue gas components at the previous moment; determining the carbon content converted into carbon oxides in the converter according to the content of various carbon oxides, the real-time flow rate of the flue gas and the steel output; determining the detected carbon content in the molten pool at the current moment by subtracting the carbon content converted into the carbon oxides from the carbon content at the previous moment.

[0013] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a carbon content detection device for a converter is provided, comprising: a first determination module for determining the flue gas analysis lag time of the flue gas analysis system of the converter, wherein the flue gas analysis system is used to detect the flue gas components of the converter; a second determination module for determining the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool; a third determination module for determining the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; a detection module for determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas components and steel output.

[0014] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium is used to store a program, wherein the program executes any one of the above-mentioned methods for detecting the carbon content of a converter.

[0015] According to another aspect of the present application, an electronic device is also provided, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned methods for detecting the carbon content of the converter.

[0016] Through this application, the following steps are adopted: determining the flue gas analysis lag time of the flue gas analysis system of the converter, wherein the flue gas analysis system is used to detect the flue gas components of the converter; determining the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool; determining the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; starting from the target measurement time, according to the preset frequency, determining the detected carbon content of the output molten pool of the converter according to a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas components and steel output.

[0017] By determining the flue gas analysis lag time of the converter's flue gas analysis system and the auxiliary gun carbon measurement lag time of the auxiliary gun measuring the carbon content, and determining the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time, and determining the real-time monitoring value of the carbon content based on the target measurement time, the purpose of considering the measurement delay, matching the measured carbon content with its actual corresponding time, and monitoring the carbon content in real time is achieved, achieving the technical effect of improving the accuracy of carbon content detection and reducing the carbon content measurement error, and can be applied to production scenarios with smaller error requirements, thereby solving the problem that the method of detecting carbon content in related technologies has large errors and cannot meet the production scenarios with smaller errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0019] Figure 1 This is a flow chart of a method for detecting carbon content in a converter provided in accordance with an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of a carbon content detection device for a converter provided according to an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] The present invention will be described below in conjunction with preferred implementation steps. Figure 1 This is a flow chart of a method for detecting carbon content in a converter according to an embodiment of the present application. Figure 1 As shown, the method includes the following steps:

[0026] Step S101, determining a flue gas analysis lag time of a flue gas analysis system of a converter, wherein the flue gas analysis system is used to detect the flue gas components of the converter;

[0027] Step S102, determining the auxiliary lance carbon measurement lag time for the converter's auxiliary lance to measure the carbon content of the molten pool;

[0028] Step S103, determining the target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time;

[0029] Step S104, starting from the target measurement time, at a preset frequency, the detected carbon content of the output molten pool of the converter is determined according to a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas composition and steel output.

[0030] Through the above steps, by determining the flue gas analysis lag time of the converter's flue gas analysis system and the auxiliary gun carbon measurement lag time of the auxiliary gun for measuring the carbon content, and determining the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time, the real-time monitoring value of the carbon content is determined according to the target measurement time, thereby achieving the purpose of considering the measurement delay, matching the measured carbon content with its actual corresponding time, and monitoring the carbon content in real time, achieving the technical effect of improving the accuracy of carbon content detection and reducing the carbon content measurement error, and can be applied to production scenarios with smaller error requirements, thereby solving the problem that the method of detecting carbon content in related technologies has large errors and cannot meet the production scenarios with smaller errors.

[0031] The execution entities of the above steps can be processors, computers, servers, and other devices with data computing and data analysis capabilities. In addition, they can also be devices with the above-mentioned devices with data computing, analysis, and processing capabilities, such as computers with processors, smartphones, wearable devices, etc., data systems with servers, computing systems, etc. The above-mentioned execution entities can be set on the converter control equipment, which is used to monitor and control the converter smelting process, including collecting data through sensors, analyzing the collected data, and controlling the relevant devices of the converter based on the analysis results.

[0032] The converter flue gas analysis system can be located at a detectable location on the converter, with sensors installed to monitor flue gas composition or attribute parameters, such as temperature. In actual use, the converter flue gas analysis system will experience a certain lag time in data collection. If this lag time is not taken into account, the subsequent calculation of real-time carbon content based on the flue gas composition collected by the flue gas analysis system will affect the real-time monitoring of carbon content, resulting in large errors in carbon content monitoring, making it impossible to meet the requirements of production scenarios where errors are relatively small.

[0033] The above-mentioned step S101, determining the flue gas analysis lag time of the converter's flue gas analysis system may include: when the oxygen blowing flow rate of the converter's oxygen lance reaches a preset proportion of the set value, recording the current time as the converter's start smelting time; when the nitrogen content in the flue gas components detected by the flue gas analysis system decreases and the carbon oxide content increases, recording the current time as the converter's start analysis time; and determining the flue gas analysis lag time based on the converter's start smelting time and the converter's start analysis time.

[0034] The oxygen lance is installed on the converter and is used to blow oxygen into the converter. The oxygen reacts with carbon in the molten steel and scrap steel to produce carbon oxide gas, thereby reducing the carbon content of the molten steel and achieving the purpose of steelmaking. The oxygen lance is sealed by a nitrogen sealing device, which uses nitrogen to seal the oxygen lance. Nitrogen is stable and will not react in the converter. Therefore, the nitrogen sealing device uses nitrogen to achieve a sealed oxygen lance.

[0035] When the oxygen flow rate from the converter's oxygen lance reaches a preset ratio of the set value, the oxygen content inside the converter has reached a certain ratio and the smelting process can begin. This time is recorded as the converter smelting start time. When the flue gas components detected by the flue gas analysis system decrease in nitrogen content and increase in carbon oxide content, the smelting process has actually begun. Oxygen can be converted into carbon oxides such as carbon monoxide or carbon dioxide, causing the carbon oxide content to increase and the nitrogen content to decrease. Therefore, the current time is recorded as the converter analysis start time. The converter smelting start time and the converter analysis start time determine the flue gas analysis lag time.

[0036] For example, after adding scrap steel and molten iron to the converter, the oxygen lance is lowered. When the oxygen flow rate of the oxygen lance reaches 70% of the normal blowing oxygen flow rate setting value, the time is recorded and defined as the converter start smelting time t1. At the same time, the flue gas analysis system is used to observe the changes in the converter flue gas composition. When the nitrogen content in the flue gas begins to decrease and the carbon dioxide content begins to rise simultaneously, the time is recorded and defined as the flue gas analysis system start analysis time t2. 烟气分析滞后 =t2-t1, represents the analysis delay time of the flue gas analysis system, in seconds.

[0037] In step S102, the secondary lance's carbon measurement lag time is determined for the converter's secondary lance's measurement of the molten pool's carbon content. The secondary lance can then be inserted into the converter's molten pool to monitor the molten pool's temperature and carbon content. The monitoring time for the molten pool's temperature is relatively short, and the temperature reading can generally be obtained immediately upon insertion. However, the carbon content may need to be calculated based on the monitored value, resulting in a lag relative to the temperature reading. This means that the carbon content appears later than the temperature, and this lag is the secondary lance's carbon measurement lag time.

[0038] Optionally, determining the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool includes: controlling the auxiliary gun to extend into the converter's molten pool to measure the temperature and carbon content of the molten pool based on the flue gas composition meeting preset conditions; when the auxiliary gun measures the temperature of the molten pool, recording the current time as the temperature appearance time; when the auxiliary gun measures the carbon content of the molten pool, recording the current time as the carbon content appearance time, wherein the carbon content appearance time is later than the temperature appearance time; determining the auxiliary gun carbon measurement lag time based on the temperature appearance time and the carbon content appearance time.

[0039] When the flue gas composition meets preset conditions, the smelting process is stable and carbon content monitoring is necessary. For example, when the CO content in the converter flue gas reaches 60% and begins to decrease, the smelting process in the converter is stabilizing. At this point, the auxiliary lance can be controlled to extend into the converter's molten pool to measure the pool's temperature and carbon content.

[0040] When the auxiliary gun measures the temperature of the molten pool, the current time is recorded as the temperature appearance time; when the auxiliary gun measures the carbon content of the molten pool, the current time is recorded as the carbon content appearance time; according to the temperature appearance time and the carbon content appearance time, the auxiliary gun carbon measurement lag time is determined. In the above example, the temperature appearance time t3, the carbon content appearance time t4 and the carbon content value C can be recorded. 开始 . t Tsc滞后 =t4-t3, represents the lag time of TSC auxiliary gun in measuring carbon content, in seconds.

[0041] Step S103 determines the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time. The flue gas analysis system has a lag time, and the flue gas components monitored by the flue gas analysis system serve as the basis for determining the real-time carbon content. The carbon content detected by the auxiliary gun also has a lag time. The flue gas analysis lag time and the auxiliary gun carbon measurement lag time need to be comprehensively considered to determine the combined carbon content detection time lag, also known as the target delay time. This allows the measurement time corresponding to the detected carbon content to be determined, also known as the target measurement time.

[0042] Optionally, determining the target measurement time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time includes: determining the target delay time based on the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; determining the target measurement time based on the starting time when the auxiliary gun detects the temperature of the molten pool, and the target delay time.

[0043] When the auxiliary gun detects the temperature, after the target delay time t=t 烟气分析滞后 -t Tsc滞后时间 Then, the carbon content of the molten pool is calculated in real time starting from the target measurement time. Considering that the flue gas analysis lag time of the flue gas analysis system and the secondary gun carbon measurement lag time of the secondary gun monitoring have opposite effects on carbon content detection, for example, the flue gas analysis lag time, i.e., the detected data is the flue gas composition before the current time, while the secondary gun carbon measurement lag time, i.e., the detected carbon content is detected after the current time. Therefore, the target delay time is determined by subtracting the secondary gun carbon measurement lag time from the flue gas analysis lag time.

[0044] The target measurement time, corresponding to the real-time carbon content, is then determined based on the start time of the secondary gun detecting the molten pool temperature and the target delay time. Based on the carbon content detected by the secondary gun and the flue gas composition from the flue gas analysis system, the actual carbon content at that real-time time is calculated.

[0045] In step S104, the carbon content of the converter's output melt pool is determined at a preset frequency starting from the target measurement time according to a preset formula. The preset formula is used to calculate the carbon content based on the real-time flue gas flow rate, flue gas composition, and steel output. Given that the carbon content of the converter melt pool does not change very quickly, the preset frequency may be once per second or every few seconds, and the specific value may be adapted to match the reaction rate in the converter.

[0046] Optionally, before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method also includes: determining the nitrogen content used for nitrogen sealing and the inert gas content used for blowing into the converter in the flue gas components; obtaining the nitrogen sealing flow and blowing flow during the operation of the converter; and determining the real-time flue gas flow based on the nitrogen content, nitrogen sealing flow, inert gas content and blowing flow.

[0047] The inert gas blown into the converter can be bottom-blown argon. where Q N2 Indicates the nitrogen blanketing flow rate during converter smelting, unit Nm 3 / min;Q Ar Indicates the bottom blowing argon flow rate, unit Nm 3 / min; Indicates the measured value of nitrogen content in flue gas; Indicates the actual measured value of argon content in flue gas.

[0048] Optionally, before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method also includes: determining the steel input amount of the converter based on various types of steel materials input into the converter; obtaining the steel material consumption index of the converter; and determining the steel output of the converter based on the steel input amount and the steel material consumption index.

[0049] Calculation of the steel output of the converter W steel =1000*(W hotmetall +W scrap ) / K 钢铁料消耗 Where W hotmetal Indicates the amount of molten iron in the furnace, in tons; W scrap Indicates the amount of scrap steel entering the furnace, in tons; W hotmetall +W scrap Collectively referred to as steel input. K钢铁料消耗 , representing the average monthly steel consumption in kilograms per ton (kg / t). This steel consumption indicator is actually a property parameter of the converter during steelmaking, indicating the steel consumption during the converter steelmaking process. Steel consumption indicator (kg / t) = steel input (kg) / steel output (t).

[0050] Optionally, determining the detected carbon content of the output molten pool of the converter according to a preset formula includes: determining the carbon content of the molten pool at the previous moment, and the content of various carbon oxides in the flue gas components at the previous moment; determining the carbon content converted into carbon oxides in the converter based on the content of various carbon oxides, the real-time flow rate of flue gas and the amount of steel discharged; and determining the detected carbon content in the molten pool at the current moment by subtracting the carbon content converted into carbon oxides from the carbon content at the previous moment.

[0051] The preset formula is as follows: Among them, C i Indicates the carbon content of the molten pool at the current moment i, that is, the real-time carbon content. i-1 Indicates the carbon content of the molten pool at time i-1, and its initial value is C 开始 , %; is the real-time measurement value of carbon monoxide in the flue gas at time i-1, %; is the real-time measurement value of carbon dioxide content in flue gas at time i-1, %; Q WGA is the converter flue gas flow rate, Nm 3 / min; W steel The output of steel from converter, in tons.

[0052] It should be noted that the oxygen supply intensity during converter smelting is 3.6-4.0 Nm 3 / t / min, the oxygen flow rate is kept constant during the smelting process; the bottom blowing argon intensity during the converter smelting process is 0.08~0.2Nm 3 / t / min.

[0053] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0054] It should be noted that the present application also provides an optional implementation, which is described in detail below.

[0055] This embodiment provides a method for predicting the carbon content at the end of a furnace. In order to improve the accuracy of the carbon content during the converter smelting process, the following measures are mainly taken in this embodiment: First, the carbon content of the molten pool detected by the auxiliary gun is used as the benchmark carbon content to eliminate the influence of the fluctuation of the carbon content of the raw material input on the carbon content; Second, the problems encountered by the converter flue gas analysis system in actual application are fully considered, and a flue gas flow model is established through flue gas data and converter smelting process information to solve the problem of inaccurate flue gas flow measurement. At the same time, the converter blowing information and auxiliary gun measurement information are used to judge the lag of flue gas analysis. On the basis of the above measures, a converter endpoint carbon content model is established to achieve accurate prediction of carbon content.

[0056] Specifically, a method for predicting the carbon content of a converter end point is provided, which is applicable to a converter production process equipped with a flue gas analysis system and a secondary lance, and comprises the following steps:

[0057] (1) After adding scrap steel and molten iron to the converter, lower the oxygen lance. When the oxygen flow rate reaches 70% of the normal blowing oxygen flow rate setting value, record the time and define it as the converter start smelting time t1. At the same time, observe the changes in the converter flue gas composition through the flue gas analysis system. When the nitrogen content in the flue gas begins to decrease and the carbon dioxide content begins to rise synchronously, record the time and define it as the flue gas analysis system start analysis time t2. 烟气分析滞后 =t2-t1, represents the analysis delay time of the flue gas analysis system, in seconds;

[0058] (2) Calculate the real-time flow rate of converter flue gas where Q N2 Indicates the nitrogen blanketing flow rate during converter smelting, unit Nm 3 / min;Q Ar Indicates the bottom blowing argon flow rate, Nm 3 / min; Indicates the measured value of nitrogen content in flue gas, %; Indicates the measured value of argon content in flue gas, %;

[0059] (3) When the CO content in the converter flue gas reaches 60% and begins to decrease, lower the TSC auxiliary gun to measure the molten pool temperature and carbon content, and record the temperature appearance time t3, carbon content appearance time t4 and carbon content value C 开始 . t Tsc滞后 =t4-t3, represents the lag time of TSC auxiliary gun measuring carbon content, in seconds;

[0060] (4) When TSC detects the temperature, after t=t 烟气分析滞后 -t Tsc滞后时间 After that, the carbon content C of the molten pool is calculated in real time. i , the calculation time interval is 1s. C iUse the following formula to calculate:

[0061] Among them C i-1 Indicates the carbon content of the molten pool at time i-1, and its initial value is C 开始 , %; is the real-time measurement value of carbon monoxide in the flue gas at time i-1, %; is the real-time measurement value of carbon dioxide content in flue gas at time i-1, %; Q WGA is the converter flue gas flow rate, Nm 3 / min; W steel is the output of steel from the converter, in tons;

[0062] It should be noted that the calculation formula for the converter steel output is W steel =1000*(W hotmetall +W scrap ) / K 钢铁料消耗 Where W hotmetal Indicates the amount of molten iron in the furnace, in tons; W scrap Indicates the amount of scrap steel entering the furnace, in tons; K 钢铁料消耗 , represents the average monthly steel material consumption, unit is kilogram per ton kg / t.

[0063] The oxygen supply intensity during converter smelting is 3.6-4.0Nm3 / t / min, and the oxygen flow rate remains constant during the smelting process;

[0064] The bottom blowing argon intensity during the converter smelting process is 0.08~0.2Nm3 / t / min.

[0065] In order to realize the real-time prediction of carbon content at the end point of converter smelting, the present embodiment mainly adopts the following methods: first, the lag time of the flue gas analysis system is determined based on the converter smelting oxygen supply information and the flue gas composition information; second, a converter flue gas flow model is established based on the flue gas composition information, converter bottom blowing argon and nitrogen sealing; third, a converter end point carbon content prediction model is established based on the carbon content measured by the auxiliary gun, the carbon content detection lag time, the flue gas analysis lag time and the flue gas flow calculation results, thereby realizing the real-time prediction of the converter end point carbon content.

[0066] Existing methods for predicting carbon content at the converter endpoint have the following shortcomings: first, they fail to account for the impact of raw material fluctuations on carbon prediction accuracy; second, they fail to consider the impact of flue gas analysis lag time on carbon prediction accuracy; and third, they fail to consider the impact of flue gas flow rate accuracy on prediction accuracy. This embodiment addresses these shortcomings and implements corresponding measures to achieve real-time and accurate prediction of the converter endpoint carbon content.

[0067] Taking the production of 80 steel in a steel plant's 120t converter as an example, the converter production process is equipped with a flue gas analysis system and a secondary gun detection system. The blowing process adopts a constant pressure and variable gun position operation mode, and the oxygen flow rate is 27000Nm 3 / h, bottom blowing flow rate is 600Nm 3 / h, nitrogen blanketing flow rate is 5400Nm 3 / h. After adding scrap steel and molten iron, the converter lowers the oxygen lance. When the oxygen flow rate reaches 18900Nm 3 / h, the blowing time is defined as t = 0s. When the nitrogen content in the flue gas begins to decrease at t = 20s, the flue gas analysis lag time is 20s. At the same time, the flue gas flow rate is calculated to be 1300Nm based on the argon and nitrogen components detected in the flue gas. 3 / min. When the blowing time is t=7800s, the CO content in the flue gas reaches 60% and then begins to decrease. At this time, the auxiliary gun is lowered to detect the molten pool temperature and carbon content. When the auxiliary gun detects the temperature, it is t=7875s, and when the carbon content appears, it is t=7885s. The measured carbon content is 0.31%. Considering the 20s lag time of flue gas analysis and the 10s lag time of the auxiliary gun in detecting the carbon content, the calculation of the molten pool carbon content begins 10s after the auxiliary gun detects the temperature, that is, the real-time calculation of the carbon content begins at t=7885s. When the calculated carbon content reaches 0.12%, the converter raises the oxygen gun and stops blowing. The auxiliary gun is used to sample and analyze the carbon content at the converter end point. The carbon content is 0.11% with an error of 0.01%, which meets the measurement requirements.

[0068] Taking the production of 80 steel in a 120t converter of a steel plant as an example, the converter production process is equipped with a flue gas analysis system and a sub-lance detection system. The blowing process adopts a constant pressure and variable lance position operation mode, and the oxygen flow rate is 27000Nm 3 / h, bottom blowing flow rate is 700Nm 3 / h, nitrogen blanketing flow rate is 5400Nm 3 / h. After adding scrap steel and molten iron, the converter lowers the oxygen lance. When the oxygen flow rate reaches 18900Nm 3 / h, the blowing time is defined as t = 0s. When the nitrogen content in the flue gas begins to decrease at t = 18s, the flue gas analysis lag time is 18s. At the same time, the flue gas flow rate is calculated to be 1350Nm based on the argon and nitrogen components detected in the flue gas. 3 / min. When the blowing time is t=7860s, the CO content in the flue gas reaches 60% and then begins to decrease. At this time, the auxiliary gun is lowered to detect the molten pool temperature and carbon content. When the auxiliary gun detects the temperature, it is t=7925s, and when the carbon content appears, it is t=7936s. The measured carbon content is 0.41%. Considering the 18s lag time of flue gas analysis and the 11s lag time of the auxiliary gun for carbon content detection, the calculation of the molten pool carbon content begins 7s after the auxiliary gun detects the temperature, that is, the real-time calculation of the carbon content begins at t=7932s. When the calculated carbon content reaches 0.09%, the converter raises the oxygen gun and stops blowing. The auxiliary gun is used to sample and analyze the carbon content at the converter end point. The carbon content is 0.10% with an error of 0.01%, which meets the measurement requirements.

[0069] The present application also provides a device for detecting the carbon content of a converter. It should be noted that the device for detecting the carbon content of a converter provided in the present application can be used to perform the method for detecting the carbon content of a converter provided in the present application. The following describes the device for detecting the carbon content of a converter provided in the present application.

[0070] Figure 2 Schematic diagram of a carbon content detection device for a converter provided in accordance with an embodiment of the present application. Figure 2 As shown, the device includes: a first determination module 22, a second determination module 24, a third determination module 26, and a detection module 28. The device will be described in detail below.

[0071] The first determination module 22 is used to determine the flue gas analysis lag time of the flue gas analysis system of the converter, wherein the flue gas analysis system is used to detect the flue gas components of the converter; the second determination module 24 is connected to the above-mentioned first determination module 22, and is used to determine the auxiliary gun carbon measurement lag time of the converter's auxiliary gun for measuring the carbon content of the molten pool; the third determination module 26 is connected to the above-mentioned second determination module 24, and is used to determine the target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; the detection module 28 is connected to the above-mentioned third determination module 26, and is used to determine the detected carbon content of the output molten pool of the converter according to a preset frequency and a preset formula starting from the target measurement time, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas components and steel output.

[0072] The carbon content detection device for the converter provided in the embodiment of the present application determines the flue gas analysis lag time of the flue gas analysis system of the converter and the auxiliary gun carbon measurement lag time of the auxiliary gun measuring the carbon content, and determines the target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time, and determines the real-time monitoring value of the carbon content according to the target measurement time, thereby achieving the purpose of considering the measurement delay, matching the measured carbon content with its actual corresponding time, and monitoring the carbon content in real time, and realizing the technical effect of improving the accuracy of carbon content detection and reducing the carbon content measurement error, and can be applied to production scenarios with smaller error requirements, thereby solving the problem that the method of detecting carbon content in the related technology has large errors and cannot meet the production scenarios with smaller errors.

[0073] The carbon content detection device of the converter includes a processor and a memory. The above-mentioned first determination module 22, second determination module 24, third determination module 26, detection module 28, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0074] The processor contains a core, which retrieves the corresponding program unit from memory. One or more cores can be configured. By adjusting the core parameters, the problem of large errors in carbon content detection in related technologies, which cannot meet the requirements of production scenarios with smaller errors, is solved.

[0075] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0076] An embodiment of the present invention provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, the method for detecting the carbon content of the converter is implemented.

[0077] An embodiment of the present invention provides a processor, which is used to run a program, wherein the method for detecting the carbon content of the converter is executed when the program is run.

[0078] Figure 3 is a schematic diagram of an electronic device provided according to an embodiment of the present application, such as Figure 3 As shown, an embodiment of the present application provides an electronic device 30, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the steps of any of the above methods are implemented.

[0079] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0080] The present application also provides a computer program product, which, when executed on a carbon content detection device of a converter, is suitable for executing a program initialized with any of the above method steps.

[0081] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0082] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable converter carbon content detection device to produce a machine, so that the instructions executed by the processor of the computer or other programmable converter carbon content detection device generate instructions for implementing the process Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0083] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable converter carbon content detection device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0084] These computer program instructions may also be loaded onto a computer or other programmable converter carbon content detection device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0085] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0086] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0087] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0088] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0089] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for detecting carbon content in a converter, characterized in that: include: Determining a flue gas analysis lag time of a flue gas analysis system of a converter, wherein the flue gas analysis system is used to detect flue gas components of the converter; Determining a secondary gun carbon measurement lag time for the secondary gun of the converter to measure the carbon content of the molten pool; Determining a target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; determining, starting from the target measurement time and at a preset frequency, a detected carbon content of the output molten pool of the converter according to a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flue gas flow rate, flue gas composition, and steel output; The preset formula is Among them, C i represents the carbon content of the molten pool at the current moment i; C i-1 represents the carbon content of the molten pool at the i-1th moment; is the real-time measurement value of carbon monoxide in the flue gas at time i-1; is the real-time measurement value of the carbon dioxide content in the flue gas at time i-1; Q WGA is the converter flue gas flow rate; W steel The output of steel from converter.

2. The method according to claim 1, characterized in that Determining the flue gas analysis lag time of the converter flue gas analysis system includes: When the oxygen flow rate of the oxygen lance of the converter reaches a preset ratio of the set value, the current time is recorded as the converter smelting start time; When the nitrogen content in the flue gas components detected by the flue gas analysis system decreases and the carbon oxide content increases, the current time is recorded as the converter analysis start time; The flue gas analysis lag time is determined according to the converter smelting start time and the converter analysis start time.

3. The method according to claim 2, characterized in that Determining the auxiliary gun carbon measurement lag time for measuring the carbon content of the molten pool by the auxiliary gun of the converter includes: When the flue gas composition meets a preset condition, controlling the auxiliary lance to extend into the molten pool of the converter to measure the temperature and carbon content of the molten pool; When the auxiliary gun measures the temperature of the molten pool, the current time is recorded as the temperature occurrence time; When the auxiliary gun measures the carbon content of the molten pool, the current time is recorded as the carbon content appearance time, wherein the carbon content appearance time is later than the temperature appearance time; The carbon measurement lag time of the auxiliary gun is determined according to the temperature appearance time and the carbon content appearance time.

4. The method according to claim 3, characterized in that Determining the target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time includes: Determining a target delay time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; The target measurement time is determined according to the start time when the sub-gun detects the temperature of the molten pool and the target delay time.

5. The method according to claim 1, wherein Before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method further includes: Determining, in the flue gas components, the nitrogen content used for nitrogen blanketing and the inert gas content used for blowing into the converter; Obtaining nitrogen blanketing flow rate and blowing flow rate during the operation of the converter; The real-time flow rate of the flue gas is determined according to the nitrogen content, the nitrogen blanketing flow rate, the inert gas content and the blowing flow rate.

6. The method according to claim 5, characterized in that Before determining the detected carbon content of the output molten pool of the converter according to a preset formula at a preset frequency starting from the target measurement time, the method further includes: Determining the steel input amount of the converter according to various types of steel materials input into the converter; Obtaining a steel material consumption index of the converter; The steel output of the converter is determined according to the steel input amount and the steel material consumption index.

7. The method according to claim 6, characterized in that Determining the detected carbon content of the output molten pool of the converter according to a preset formula includes: Determining the carbon content of the molten pool at the last moment and the content of various carbon oxides in the flue gas components at the last moment; Determining the carbon content converted into carbon oxides in the converter according to the content of the various carbon oxides, the real-time flow rate of the flue gas and the tapping amount; The carbon content in the molten pool at the current moment is determined by subtracting the carbon content converted into the carbon oxides from the carbon content at the previous moment.

8. A device for detecting carbon content in a converter, characterized in that: include: a first determining module, configured to determine a flue gas analysis lag time of a flue gas analysis system of a converter, wherein the flue gas analysis system is configured to detect flue gas components of the converter; The second determining module is used to determine the auxiliary gun carbon measurement lag time of the auxiliary gun of the converter for measuring the carbon content of the molten pool; a third determining module, configured to determine a target measurement time according to the flue gas analysis lag time and the auxiliary gun carbon measurement lag time; a detection module, configured to determine, starting from the target measurement time and at a preset frequency, a detected carbon content of the output molten pool of the converter according to a preset formula, wherein the preset formula is used to calculate the detected carbon content based on the real-time flow rate of the flue gas, the composition of the flue gas, and the amount of steel tapped; The preset formula is Among them, C i represents the carbon content of the molten pool at the current moment i; C i-1 represents the carbon content of the molten pool at the i-1th moment; is the real-time measurement value of carbon monoxide in the flue gas at time i-1; is the real-time measurement value of the carbon dioxide content in the flue gas at time i-1; Q WGA is the converter flue gas flow rate; W steel The output of steel from converter.

9. A computer-readable storage medium, characterized in that The storage medium is used to store a program, wherein the program executes the method for detecting the carbon content of a converter according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the carbon content detection method of the converter according to any one of claims 1 to 7.

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