CN112775404B - Method for predicting temperature of straightening section of continuous casting square billet - Google Patents
Method for predicting temperature of straightening section of continuous casting square billet Download PDFInfo
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- CN112775404B CN112775404B CN202110080356.0A CN202110080356A CN112775404B CN 112775404 B CN112775404 B CN 112775404B CN 202110080356 A CN202110080356 A CN 202110080356A CN 112775404 B CN112775404 B CN 112775404B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention relates to a method for predicting the temperature of a straightening section of a continuous casting square billet, which comprises a data acquisition module, a data storage module, a data analysis module and an operation guidance module; the data acquisition module acquires main process data of the furnace pouring, and the data acquisition module comprises the following steps: the main chemical components of the casting steel, the temperature of the tundish molten steel, the cooling strength and other parameters; the data storage module stores the acquired data and establishes a database; the data analysis module analyzes and compares the data provided by the database; the operation guidance module can adjust the molten steel process parameters according to the data provided by the analysis module, the operation rules and the straightening temperature requirement. The invention supports accurate logic analysis and judgment by using database resources from a large amount of data collected in the field production process, and deduces the operating process parameters for controlling the temperature of the continuous casting furnace straightening section of the continuous casting billet in real time according to specific steel type components.
Description
Technical Field
The invention relates to a method for predicting the temperature of a straightening section of a continuous casting square billet. Belongs to the technical field of continuous casting production.
Background
In a high temperature environment, the thermoplasticity of steel changes with temperature changes. In special steel production enterprises, the surface quality of a casting blank is influenced by straightening temperature in addition to the influence factors suffered in the blank shell forming process. The straightening temperature of the casting blank is mainly related to the main components of the steel grade, the temperature of the tundish molten steel, the pulling speed, the parameters of a cooling device and the like. In the continuous casting pouring process, the temperature of the continuous casting billet in the straightening section can be adjusted by changing the parameters. In actual work, steel is controlled by three types of high carbon, medium carbon and low carbon, the high carbon steel (the carbon content is 0.8-1.2) has relatively few alloy types, and the relation between the straightening temperature and the pouring process parameter is relatively stable; after the variety of the low-carbon steel alloy is increased, the release of a lot of phase change latent heat is involved, the variable quantity is too large, and the relationship between the straightening temperature and the casting process parameter is difficult to find. The method is mainly applied to high-carbon steel (the carbon content is 0.8-1.2), and continuous casting operation parameters required by the molten steel of the steel type pouring continuous casting furnace are given in advance by calculation and empirical summary according to the specific straightening temperature requirement of the steel type, so as to guide field operation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for predicting the temperature of the straightening section of a continuous casting square billet aiming at the prior art, put forward the relation between the straightening temperature and the parameters of the pouring process, give the adjustment suggestions of specific parameters such as the temperature, the drawing speed, the parameters of a cooling device and the like of the molten steel of a tundish by utilizing the characteristics of equipment and the existing operation experience, and guide the field operation.
The technical scheme adopted by the invention for solving the problems is as follows: a method for predicting the temperature of a straightening section of a continuous casting square billet is characterized by comprising the following steps: the method comprises the following steps:
the data acquisition part is used for acquiring various data of main technological parameters of the current furnace casting, including steel grade main components, temperature of tundish molten steel, pulling speed and cooling device parameters, and sending the acquired data to the data storage part;
the data storage part is used for storing the process parameters of each furnace, collected by the data collection part, through establishing a database, selecting a target value within a standard straightening temperature range, and correspondingly storing the target value and the collected process parameters;
the data analysis part is used for calculating the current straightening temperature of the steel grade to be poured according to the collected pouring process parameters;
and the operation guiding part is used for comparing the current straightening temperature obtained by calculation with the selected standard straightening temperature, determining that the technological parameters of the current furnace pouring meet the conditions if the results are the same or the error is within +/-5 ℃, and otherwise, ensuring that the straightening temperature is within the error range of the standard value by adjusting the technological parameters of the current furnace pouring.
Preferably, the main component of the steel grade in the data acquisition part is to judge whether the carbon content is between 0.8 and 1.2 percent.
Preferably, the cooling device parameters include crystallizer water flow, specific water flow and electromagnetic stirring coefficient.
Preferably, the standard straightening temperature range is 900-.
Preferably, the straightening temperature is related to the casting process data as follows:
straightening temperature (DEG C) — 125+0.675 times temperature (DEG C) +203 × pulling speed (m/min) -0.139 × crystallizer water (m3/h) -61 × specific water amount (L/Kg) -0.0653 × electromagnetic stirring coefficient,
wherein: the temperature is the temperature of the molten steel of the tundish, the range is 1470 plus 1520 ℃, the range of the pulling speed is 0.4-0.7m/min, and the water flow of the crystallizer is 150 plus 180m3H, the specific water amount is 0.16-0.25L/Kg, and the electromagnetic stirring coefficient comprises: the current is 100-150A, the frequency is 2Hz, and the electromagnetic stirring coefficient is obtained by the current value and the frequency during calculation.
Compared with the prior art, the invention has the advantages that:
the invention supports accurate logic analysis and judgment by using database resources from a large amount of data collected in the field production process, and deduces the operating process parameters for controlling the temperature of the continuous casting furnace straightening section of the continuous casting billet in real time according to specific steel type components. Meanwhile, production field data are stored and accumulated, and the process is further optimized conveniently.
Drawings
FIG. 1 is a schematic flow chart of a method for predicting the temperature of the straightening section of a continuous casting furnace for continuous casting billets according to an embodiment of the invention.
Detailed Description
The invention will be further explained and illustrated by the following description and specific examples in conjunction with the accompanying drawings, which are not intended to unduly limit the technical scheme of the invention.
Example 1:
producing steel with carbon content of 0.9% on a casting machine with 300 x 340 square billet and the machine type of 5 machines and 5 streams, and the pulling and straightening radius of 12 meters, wherein the preset straightening temperature is 970 ℃. When the pouring temperature of molten steel in a tundish is 1510 ℃, when the casting speed of 0.6m/min is adopted, the water of a crystallizer is 200m3/h, the specific water amount is 0.3L/Kg, and the electromagnetic stirring coefficient is 300, the straightening temperature is expected to be 950 ℃, and the preset temperature cannot be met; then a measure of adjusting the pulling speed can be taken, the pulling speed is adjusted from 0.6m/min to 0.7m/min, and the pulling speed is substituted into a formula, the straightening temperature is about 970 ℃, and the requirement is met.
Example 2:
the steel with the carbon content of 0.9 percent is produced on a casting machine with 300 by 340 square billets, the machine type is 5 machines and 5 streams, the pulling and straightening radius is 12 meters, and the preset straightening temperature is 940 ℃. When the pouring temperature of the molten steel in the tundish is 1490 ℃, when the casting speed of 0.6m/min is adopted, the water of the crystallizer is 150m3/h, the specific water amount is 0.3L/Kg, and the electromagnetic stirring coefficient is 200, the straightening temperature is expected to be 950 ℃, and the preset temperature cannot be met; the pulling speed can be adjusted to 0.55m/min, the specific water amount is adjusted to 0.2L/Kg, the straightening temperature is predicted to be 939 ℃, and the requirement of the preset straightening temperature can be met.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (4)
1. A method for predicting the temperature of a straightening section of a continuous casting square billet is characterized by comprising the following steps: the method comprises the following steps:
the data acquisition part is used for acquiring various data of main process parameters of the current furnace casting, including steel grade main components, temperature of tundish molten steel, pulling speed and parameters of a cooling device, and sending the acquired data to the data storage part;
the data storage part is used for storing the process parameters of each furnace, collected by the data collection part, through establishing a database, selecting a target value within a standard straightening temperature range, and correspondingly storing the target value and the collected process parameters;
the data analysis part is used for calculating the current straightening temperature of the steel grade to be poured according to the collected pouring process parameters;
the operation guiding part compares the current straightening temperature obtained by calculation with the selected standard straightening temperature, if the result is the same or the error is within +/-5 ℃, the process parameter of the current furnace pouring is determined to meet the condition, otherwise, the straightening temperature is ensured to be within the error range of the standard value by adjusting the process parameter of the current furnace pouring;
the relationship between the straightening temperature and the pouring process data is as follows:
straightening temperature (DEG C) = -125+0.675 multiplied by temperature (DEG C) +203 multiplied by pulling speed (m/min) -0.139 multiplied by crystallizer water (m3/h) -61 multiplied by specific water quantity (L/Kg) -0.0653 multiplied by electromagnetic stirring coefficient,
wherein: the temperature is the temperature of the molten steel of the tundish, the range is 1470-: the current is 100-150A, the frequency is 2Hz, and the electromagnetic stirring coefficient is obtained by the current value and the frequency during calculation.
2. The method for predicting the temperature of the straightening zone of a continuous casting billet according to claim 1, wherein: the main component of the steel grade in the data acquisition part is to judge whether the carbon content is between 0.8 and 1.2 percent.
3. The method for predicting the temperature of the straightening zone of a continuous casting billet according to claim 1, wherein: the parameters of the cooling device comprise crystallizer water flow, specific water flow and electromagnetic stirring coefficient.
4. The method for predicting the temperature of the straightening zone of a continuous casting billet according to claim 1, wherein: the standard straightening temperature range is 900-1100 ℃.
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| CA2414167A1 (en) * | 2002-12-12 | 2004-06-12 | Dofasco Inc. | Method and online system for monitoring continuous caster start-up operation and predicting start cast breakouts |
| CN105223927B (en) * | 2015-10-12 | 2018-03-13 | 上海应用技术学院 | Manufacture system is researched and developed in a kind of continuously casting cloud computing |
| CN106180619A (en) * | 2016-08-12 | 2016-12-07 | 湖南千盟物联信息技术有限公司 | A kind of system approach of casting process Based Intelligent Control |
| CN110322057B (en) * | 2019-06-20 | 2023-04-18 | 江阴兴澄特种钢铁有限公司 | Prediction system and prediction method for carbon component in tapping of 100t direct-current electric arc furnace |
| CN110991916A (en) * | 2019-12-10 | 2020-04-10 | 马鞍山钢铁股份有限公司 | Casting blank quality judgment system and method |
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