CN-117086277-B - Automatic slag adding system of continuous casting machine

CN117086277BCN 117086277 BCN117086277 BCN 117086277BCN-117086277-B

Abstract

The automatic casting powder adding system for the continuous casting machine comprises a space detection module, a processor calculation module and a slag discharging module, wherein the space detection module is used for detecting the thickness of casting powder in the continuous casting machine, the processor calculation module can calculate the quantity of the casting powder to be added according to the thickness of the casting powder in the continuous casting machine, and the slag discharging module can accurately add the calculated corresponding quantity of the casting powder into the continuous casting machine.

Inventors

ZHAI SHENGHUI
ZHAI RONGCAN
PENG JIE
YANG HENG
YAO WENFANG
JIANG TENGCHAO
LI HAO

Assignees

洛阳科丰冶金新材料有限公司

Dates

Publication Date: 20260512
Application Date: 20230831

Claims (6)

1. The automatic slag adding system of the continuous casting machine is characterized by comprising a space detection module (1), a processor calculation module (2) and a slag discharging module (3), wherein the space detection module (1) is used for detecting the thickness of the casting slag in the continuous casting machine, the processor calculation module (2) can calculate the quantity of the casting slag to be added according to the thickness of the casting slag in the continuous casting machine, and the slag discharging module (3) can accurately add the calculated corresponding quantity of the casting slag into the continuous casting machine; the slag discharging module (3) comprises a storage box (301), an electromagnetic valve (302) and a slag discharging pipe (303), wherein the storage box (301) is internally used for storing protective slag, a discharge hole is formed in the bottom of the storage box (301), the discharge hole is correspondingly communicated with the slag discharging pipe (303) through the electromagnetic valve (302), and the slag discharging pipe (303) correspondingly discharges to a slag groove; the storage box (301) is internally provided with a baffle (304) and a vibrating plate mechanism (305), wherein the baffle (304) is obliquely arranged, the lower end of the baffle (304) is correspondingly hinged with the storage box (301), the lower end of the baffle (304) is correspondingly in interference fit with a discharge hole of the storage box (301), the higher end of the baffle (304) is correspondingly in interference fit with the inner wall of the storage box (301), the bottom of the baffle (304) is provided with an arc-shaped boss (306), the vibrating plate mechanism (305) comprises a support column (3051), a motor (3052) and a cam (3053), the support column (3051) is arranged on the inner bottom surface of the storage box (301), the top of the support column (3051) is provided with the cam (3053), and the motor (3052) for driving the cam (3053) to rotate is correspondingly in interference with the boss (306); The calculation process of the processor calculation module (2) is as follows: 1) Collecting data including casting parameters, material properties, and production requirements; 2) Establishing a mathematical model by adopting a multiple regression model according to the collected data and the detected thickness of the covering slag; 3) Based on the established mathematical model, searching for the optimal combination of slag adding speed, covering slag thickness and slag density parameters by using an optimization algorithm; 4) Setting certain process constraint conditions when parameter optimization is performed; 5) And the processor controls the casting quantity of the protective slag in real time according to the final data obtained by the operation of the mathematical model under the constraint condition.
2. The automatic slag adding system of the continuous casting machine according to claim 1, wherein the space detection module (1) is composed of a plurality of laser scanners, the laser scanners are arranged at the bottom of the slag adding module (3), and the scanning ends of the laser scanners face to slag grooves of the continuous casting machine correspondingly.
3. The automatic slag adding system of continuous casting machine of claim 1, wherein the specific formula of the mathematical model in the step 2) is as follows: ; Wherein y is the thickness of the mold flux, As the coefficient of regression of the coefficient of the data, In order to achieve a casting speed, the casting speed, For the flow rate of the slag charge, For the density of the slag charge, the density of the slag charge is the same as that of the slag charge, The error term is represented, and the regression coefficient is calculated specifically as follows: ; where mean () represents the average value and sum () represents the sum.
4. The automatic slag adding system of continuous casting machine of claim 3, wherein the optimization algorithm in the step 3) adopts a gradient descent method, and the calculation process is as follows: a. defining an objective function as the thickness of the mold flux, i.e ; B. Initializing parameters, namely selecting 、、 And As parameters and assign them initial values, noted as 、、 And ; C. Defining a loss function, wherein the loss function is the square difference of the objective function and is used for measuring the difference between the predicted value and the true value of the model, and the loss function can be defined as follows: ; Wherein, the Is the actual thickness value of the mold flux, 、 And The actual pouring speed, the actual slag flow and the actual slag density are respectively corresponding; d. calculating gradients for each parameter Calculating the gradient of the loss function relative to the parameter ; E. Updating parameters, namely multiplying the learning rate by the gradient according to the updating rule of the gradient descent method to obtain updated values of the parameters, wherein the updating formula is as follows: ; ; ; ; Wherein, the Representing the learning rate and determining the step length of parameter updating; f. repeating the step d and the step e until a stopping condition is reached, wherein the stopping condition can be set, such as the maximum iteration times are reached, the change of the loss function is smaller than a certain threshold value or a preset precision requirement is reached; g. outputting optimal parameter combination, when the stop condition is reached, outputting optimal 、、 And As a result of the optimization; h. repeating the step c and the step d until a stopping condition is reached, wherein the stopping condition can be set, such as the maximum iteration times are reached, the change of the objective function is smaller than a certain threshold value or a preset precision requirement is reached; i. and outputting the optimal parameters, namely outputting the optimal parameter values as an optimization result after the stop condition is reached.
5. The automatic slag adding system of continuous casting machine of claim 4, wherein the gradient calculation in the step d comprises the following specific steps: ; ; ; ; Where Σ represents summing all samples.
6. The automatic slag adding system of a continuous casting machine according to claim 1, wherein an extension plate (307) is arranged on the high end tail surface of the baffle plate (304), and a groove matched with the extension plate (307) is arranged on the inner side surface of the storage box (301).

Description

Automatic slag adding system of continuous casting machine Technical Field The invention relates to the technical field of metal casting, in particular to an automatic slag adding system of a continuous casting machine. Background It is known that continuous casting mold flux plays an important role in protecting the interface between slag and casting blank effectively, reducing oxidation reaction and preventing oxidation and solidification of metal, wherein a certain amount of mold flux filler is firstly put into a slag tank of a continuous casting machine before casting is started, then the filler is melted along with the start of the continuous casting process to form a slag layer, then the mold flux continuously runs and covers the casting blank and slag to form a protective layer in the continuous casting process, finally, in order to maintain the performance and stability of the continuous casting mold flux, the components of the slag layer are required to be supplemented and regulated according to the situation, the traditional supplementing means is to judge when the mold flux needs to be added and the adding amount, but the method is easy to cause more or less added mold flux because of the lack of calculation, the slag layer is easy to be thinned when the adding amount of the mold flux is small, the quality of the casting blank is affected, and the excessive mold flux causes the following problems: 1. The slag chamber is blocked, thereby affecting the flow of molten steel and possibly causing safety problems such as overflow or splash of molten steel; 2. the temperature and the component distribution in the molten steel are uneven, so that the abnormal high or low temperature area of the molten steel is caused, bad cooling conditions and bad crystallization of a crystallizer are caused, and the quality of a continuous casting blank is further adversely affected; 3. Excessive casting powder can increase resistance in the casting process, so that the flow of molten steel is limited, thereby slowing down the casting speed, prolonging the casting time and reducing the continuous casting production efficiency; the invention discloses an automatic casting powder adding device for a continuous casting machine, which can realize the timing and quantitative automatic adding of the casting powder for the crystallizer on a steelmaking production line through a distributing hopper arranged above the crystallizer, improves the uniformity of the distribution, reduces the waste of the casting powder, improves the quality of billets, reduces the labor intensity of operators, has simpler structure of the whole equipment, smaller occupied area and lower cost, but the state of the casting powder in the continuous casting machine still needs to be confirmed by means of manual judgment, so that the device can not accurately determine when and how much of the casting powder is still added, thereby the problem of adding excessive casting powder in the continuous casting machine still occurs; In addition, the self-adaptive slag thickness control method and device based on the slag adding mechanism of the continuous casting machine disclosed in China patent (CN 202111506905.2) send a specific control signal to the slag adding robot through a corresponding algorithm, so that the slag adding robot is controlled to quantitatively add the covering slag, but the cost of the slag adding robot is higher; Therefore, in view of the above, there is a need in the market for a slag adding system that is low in use cost and can accurately determine the amount of mold flux added. Disclosure of Invention In order to overcome the defects in the background technology, the invention discloses an automatic slag adding system of a continuous casting machine. In order to achieve the aim of the invention, the invention adopts the following technical scheme: The automatic slag adding system of the continuous casting machine comprises a space detection module, a processor calculation module and a slag discharging module, wherein the space detection module is used for detecting the thickness of the casting slag in the continuous casting machine, the processor calculation module can calculate the quantity of the casting slag to be added according to the thickness of the casting slag in the continuous casting machine, and the slag discharging module can accurately add the calculated corresponding quantity of the casting slag into the continuous casting machine. Preferably, the space detection module is composed of a plurality of laser scanners, the laser scanners are arranged at the bottom of the slag tapping module, and the scanning ends of the laser scanners face to slag grooves of the continuous casting machine correspondingly. Preferably, the calculation process of the processor calculation module is as follows: 1) Collecting data including casting parameters, material properties, and production requirements; 2) Establishing a mathematical mode