KR102468045B1 - Appartus and method for predicting amount of molten steel in spout type electric furnace - Google Patents

Abstract

The present invention provides a device and a method for predicting the amount of molten steel in a spout type electric furnace, wherein the amount of molten steel is predicted according to a look-up table in which the relationship between the tilting angle of the electric furnace body and the amount of molten steel tapping has been set in advance. The device for predicting the amount of molten steel in a spout type electric furnace according to an embodiment of the present invention comprises: an angle monitoring part for monitoring the tilting angle of the electric furnace; a tapping detection part for detecting whether or not molten steel is tapped in the electric furnace; and a prediction part for predicting the amount of molten steel flowing into a ladle by referring to the tilting angle of the electric furnace having the tapping of the molten steel detected by the tapping detection part in the look-up table in which the relationship between the tilting angle of the electric furnace and the amount of molten steel has been set in advance, and determining the dissolution damage degree of refractories in the electric furnace depending on a difference between the measured amount of molten steel and the predicted amount of molten steel. The method for predicting the amount of molten steel in a spout type electric furnace according to an embodiment of the present invention comprises the steps of: the angle monitoring part monitoring the tilting angle of the electric furnace; the tapping detection part detecting whether molten steel is tapped in the electric furnace; and the prediction part predicting the amount of molten steel flowing into a ladle by referring to the tilting angle of the electric furnace having the tapping of the molten steel detected by the tapping detection part in the look-up table in which the relationship between the tilting angle of the electric furnace and the amount of molten steel has been set in advance, and determining the dissolution damage degree of refractories in the electric furnace depending on a difference between the measured amount of molten steel and the predicted amount of molten steel.

Description

Apparatus and method for predicting melting amount of spout type electric furnace

The present invention relates to an apparatus and method for predicting the amount of melted steel in a spout-type electric furnace.

In general, in an electric furnace, it is very difficult to predict the amount of molten steel to be tapped because the amount of scrap charged into the electric furnace is different every time and the real rate is also different. In order to solve this problem, various methods of measuring the molten surface height can be considered as a way to determine the situation in the electric furnace, but maintenance is very difficult in the case of an electric furnace in which the electric furnace loop must be moved to charge scrap dozens of times a day. In particular, a kettle-shaped spout-type electric furnace is used in a process in which the components of scrap charged before and after loading can rapidly change, and it is necessary to accurately predict the amount of molten steel to prevent the actual rate of steel tapping and scattering.

Republic of Korea Patent Publication No. 10-2019-0078055

According to an embodiment of the present invention, an apparatus and method for predicting a molten steel amount in a spout type electric furnace are provided according to a lookup table in which a relationship between a tilt angle of an electric furnace body and a molten steel tapping amount is set in advance.

In order to solve the above-described problems of the present invention, an apparatus for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention includes an angle monitoring unit for monitoring a tilting angle of the electric furnace, and a device for detecting whether or not molten steel in the electric furnace is tapped. The tapping detection unit predicts the amount of molten steel flowing into the ladle by referring to the tilting angle of the electric furnace in which tapping of molten steel is detected by the tapping detection unit in the lookup table in which the relationship between the tilting angle of the electric furnace and the amount of molten steel is set in advance, and the actual measurement It may include a prediction unit for determining the degree of dissolution of the refractory in the electric furnace according to the difference between the amount of molten steel and the predicted amount of molten steel.

A method for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention includes the step of monitoring the tilting angle of the electric furnace by an angle monitoring unit, the step of detecting whether or not the molten steel in the electric furnace is tapped by a tapping detection unit, and the predicting unit setting in advance. In the look-up table in which the relationship between the tilting angle of the electric furnace and the amount of molten steel is set, the amount of molten steel flowing into the ladle is predicted by referring to the tilting angle of the electric furnace in which tapping of molten steel is detected by the tapping detection unit, and the actual measured molten steel and determining the degree of dissolution of the refractory in the electric furnace according to the difference between the amount of molten steel and the predicted amount of molten steel.

According to an embodiment of the present invention, it is possible to prevent scattering of molten metal, minimize mixing of slag to maximize steel tapping error rate, and manage refractory erosion history.

1 is a schematic configuration diagram of an apparatus for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention.
2 is examples of a look-up table of a molten steel amount predicting device for a spout-type electric furnace according to an embodiment of the present invention.
3 illustrates examples of increasing set values of a lookup table of an apparatus for estimating molten steel in a spout-type electric furnace according to an embodiment of the present invention.
4 is a flowchart schematically illustrating a method for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention.
5 is a diagram illustrating an example computing environment in which one or more embodiments set forth herein may be implemented.

Hereinafter, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention with reference to the accompanying drawings.

1 is a schematic configuration diagram of an apparatus for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention.

Referring to FIG. 1 , in the spout-type electric furnace A, most of the molten steel exists below the tap opening when the tilting angle θ is 0° in consideration of the outflow of slag. Accordingly, the mechanical design value of the tilting angle of the spout type electric furnace A is -10 ° to 38 °, and most of the molten steel can be tapped at approximately 10 ° to 30 °.

The ladle (B) may be placed at the bottom of the spout-type electric furnace (A) so that the molten steel being tapped flows in, and a load cell (C) for measuring the weight of the molten steel is placed at the bottom of the ladle (B) to measure the weight of the molten steel. can be measured.

The apparatus 100 for predicting the amount of melted steel in a spout-type electric furnace according to an embodiment of the present invention may include an angle monitoring unit 110, a tapping detection unit 120, and a prediction unit 130.

The angle monitoring unit 110 may monitor the tilt angle θ of the spout type electric furnace A.

The tapping detection unit 120 may detect whether or not molten steel inside the electric furnace is tapped from the tap opening of the spout-type electric furnace A. To this end, the tap detection unit 120 may be composed of various sensors such as a laser sensor, an image sensor, and a temperature sensor.

The prediction unit 130 may include a pre-set look-up table 131 and a setting unit 132, and predict the amount of molten steel flowing into the ladle from the spout-type electric furnace A based on the look-up table 131. can

In the lookup table 131, a relationship between the tilt angle and the accumulated amount of molten steel flowing into the ladle may be set.

The setting unit 132 may set each setting value of the lookup table 131 .

The volume according to the tilting angle can be obtained by three-dimensional scanning the inside of the furnace body of the spout-type electric furnace (A) or by using a liquid, such as water, before operation. Setting values of the table 131 can be set. Accordingly, in the lookup table 131, a relationship between the tilt angle and the amount of molten steel may be set.

2 is examples of a look-up table of a molten steel amount predicting device for a spout-type electric furnace according to an embodiment of the present invention.

Referring to FIG. 2 , a plurality of lookup tables 131 set by the setting unit 132 may be set.

As described above, the relationship between the tilting angle and the amount of molten steel may be set in the lookup table 131, and the cumulative amount of molten steel may be set differently in the plurality of lookup tables according to the tilting angle at the time when the molten steel is tapped from the tap. can

Depending on the amount of molten steel inside the spout-type electric furnace A, the tilting angle and the accumulated amount of molten steel at the time of tapping may be different. For example, the tilt angle at the time of tapping may be 10°, 11°, or 12° according to the amount of molten steel inside the spout-type electric furnace (A), and the amount of molten steel inside the spout-type electric furnace (A) may be tapped. The cumulative amount of steel to be melted may be different.

Referring back to FIG. 1, the prediction unit 130 may predict the total amount of molten steel flowing into the ladle B with reference to the lookup table 131, and accordingly, the change in the tilt angle of the spout type electric furnace A , It is possible to suppress the scattering of the molten steel flowing into the ladle (B) by controlling the angular acceleration.

Meanwhile, the setting unit 132 may receive a detection value obtained by actually measuring the weight of the ladle's molten steel from the load cell (C) installed below the ladle (B).

After the middle of the preset steel tapping operation, the difference between the pull tapping amount and the preset tilting angle tapping amount (for example, 20° tapping amount) should remain constant regardless of the charging amount, but if the difference increases, it is a spout type It can be seen that the internal volume of the molten metal increased by α shown in FIG. 3 due to increased erosion of the refractory material (a) inside the electric furnace (A). For example, when an Electro-Magnetic Stirrer (EMS) that causes a lower flow is installed, such as in STS 3 steelmaking, the degree of erosion in the electric furnace may be severe. The set value of the tapping amount of the lookup table 131 should be increased by α shown in FIG. 3 to approach the actual amount of molten steel. In addition, assuming that there is no maintenance during the steel tapping operation, the α value will have an increasing trend when the number of times of charging increases. If the value of α is tracked, it can be used as a refractory erosion history, and if the total amount of molten metal at the initial tilting angle can be predicted in advance according to the increase in the internal volume of molten metal, the scattering of molten metal can be suppressed through a change in the acceleration that tilts the electric furnace. That is, the value of α can be regarded as an increase in the internal volume of the electric furnace due to the increase in erosion of the refractory material, and by correcting this, the degree of prediction of the amount of molten metal can be increased, and the value of α can be tracked and used as a history of erosion of the refractory material. More specifically, the refractory bricks of the electric furnace undergo abrasion according to the number of uses after initial construction, but the degree of abrasion is difficult to determine from the outside of the electric furnace, and when erosion of the refractory increases, the internal volume of the furnace increases, but excessive It can be judged that the erosion of refractories is progressed by the molten steel leakage accident in the electric furnace. Accordingly, before the molten steel spill accident, the electric furnace is repaired. By monitoring the degree of erosion, the repair time of the electric furnace wall can be predicted. In addition, the prediction unit 130 may determine the value of α as the degree of dissolution of the refractory material (a) inside the spout type electric furnace (A).

4 is a flowchart schematically illustrating a method for predicting the amount of molten steel in a spout-type electric furnace according to an embodiment of the present invention.

Referring to FIG. 4 together with FIGS. 1 and 2 , first, the angle monitoring unit 110 may continuously monitor the tilt angle θ of the spout-type electric furnace A (S1).

Thereafter, the tapping detection unit 120 may detect whether or not the molten steel inside the electric furnace is tapped from the tap opening of the spout-type electric furnace A. When the tapping detection unit 120 detects that molten steel is tapped in the spout-type electric furnace A (a tapping recognition signal), the prediction unit 130 refers to the lookup table 131 according to the tilt angle θ at the time of tapping. (S2), the final amount of molten steel flowing into the ladle (B) can be predicted (S3). For example, if the tilting angle at the time of tapping is 10°, 11° or 12°, if the prediction unit 130 predicts the total amount of molten steel in advance by referring to the lookup table 131, the prediction unit 130 predicts the spout type electric It is possible to suppress the scattering of molten steel flowing into the ladle B by controlling the change in acceleration, angular acceleration, etc. of tilting the furnace body of the furnace A.

On the other hand, when the load cell (C) under the ladle (B) actually measures the weight of the molten metal of the ladle (B) (S4), after the middle of the previously set steel tapping operation, the setting unit 132 determines the pull tapping amount and the preset tilt motion. Calculate the difference between the angle tapping amounts (for example, 20° tapping amount) (S5), complete the prediction of the molten steel amount to be tapped depending on whether it is increased (S6, S7), or lookup table 131 by the increased α It can be set by increasing the set value of the tapping amount, and then, according to the look-up table 131 with the increased set value, it is possible to control the change in acceleration, angular acceleration, etc. of tilting the furnace body. If the amount is increased, the loss can be suppressed by minimizing the molten steel discarded to the surroundings from the ladle truck receiving the molten steel by controlling the tilting speed accordingly.

5 is a diagram illustrating an example computing environment in which one or more embodiments set forth herein may be implemented.

Referring, in conjunction with FIG. 1 , to FIG. 5 , which illustrates an exemplary computing environment in which one or more embodiments set forth herein may be implemented, a computing device configured to implement one or more embodiments described herein ( 1100, shows an example of a system 1000. For example, computing device 1100 may be a personal computer, server computer, handheld or laptop device, mobile device (mobile phone, personal digital assistant, media player, etc.), multiprocessor system, consumer electronics, mini computer, mainframe computer, distributed computing environments that include any of the foregoing systems or devices; and the like.

Computing device 1100 may include at least one processing unit 1110 and memory 1120 . Here, the processing unit 1110 may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Arrays (FPGA), and the like. and may have a plurality of cores. The memory 1120 may be volatile memory (eg, RAM, etc.), non-volatile memory (eg, ROM, flash memory, etc.), or a combination thereof.

Additionally, computing device 1100 may include additional storage 1130 . Storage 1130 includes, but is not limited to, magnetic storage, optical storage, and the like. The storage 1130 may store computer readable instructions for implementing one or more embodiments disclosed herein, and may also store other computer readable instructions for implementing an operating system, application programs, and the like. Computer readable instructions stored in storage 1130 may be loaded into memory 1120 for execution by processing unit 1110 .

Computing device 1100 can also include input device(s) 1140 and output device(s) 1150 . Here, input device(s) 1140 may include, for example, a keyboard, mouse, pen, voice input device, touch input device, infrared camera, video input device, or any other input device. Output device(s) 1150 may also include, for example, one or more displays, speakers, printers, or any other output devices, or the like. Additionally, computing device 1100 may use an input device or output device included in another computing device as input device(s) 1140 or output device(s) 1150 .

Computing device 1100 may also include communication connection(s) 1160 that allow it to communicate with other devices (eg, computing device 1300 ) over network 1200 . Here, communication connection(s) 1160 may be a modem, network interface card (NIC), integrated network interface, radio frequency transmitter/receiver, infrared port, USB connection, or other device for connecting computing device 1100 to other computing devices. May contain interfaces. Further, communication connection(s) 1160 may include a wired connection or a wireless connection.

Each component of the aforementioned computing device 1100 may be connected by various interconnections such as a bus (eg, peripheral component interconnection (PCI), USB, firmware (IEEE 1394), optical bus structure, etc.) and may be interconnected by networks.

Terms such as "prediction unit", "setting unit", "lookup table", etc., as used herein generally refer to computer-related entities that are hardware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. For example, both the application running on the controller and the controller may be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer or distributed between two or more computers.

As described above, according to the present invention, the amount of molten steel according to the tilting angle at the time of tapping the molten steel can be predicted by referring to the lookup table in which the relationship between the tilting angle and the cumulative amount of molten steel is set in advance, thereby changing the tilt acceleration of the electric furnace, angular acceleration, etc. It is possible to prevent the scattering of molten metal by controlling molten metal, and to maximize the steel tapping error rate by suppressing slag mixing as much as possible, and to predict refractory erosion according to the difference between the predicted molten steel amount and the actually measured molten steel amount to determine the degree of refractory melting loss and refractory erosion. It has the effect of managing history.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, but is limited by the claims to be described later, and the configuration of the present invention can be varied within a range that does not deviate from the technical spirit of the present invention. Those skilled in the art can easily know that the present invention can be changed and modified accordingly.

100: molten steel amount prediction device of spout type electric furnace
110: angle monitoring unit
120: tapping detection unit
130: prediction unit
131: lookup table
132: setting unit

Claims (10)

Angle monitoring unit for monitoring the tilting angle of the electric furnace;
a tapping detection unit for detecting whether or not the molten steel in the electric furnace is tapped; and
The amount of molten steel flowing into the ladle is predicted by referring to the tilting angle of the electric furnace in which tapping of molten steel is detected by the tapping detector in the lookup table in which the relationship between the tilting angle of the electric furnace and the amount of molten steel is set in advance, and the actual measured amount of molten steel And a prediction unit for determining the degree of dissolution of the refractory in the electric furnace according to the difference between the predicted amount of molten steel,
The prediction unit includes a setting unit for obtaining the internal volume of the furnace body of the electric furnace in advance using at least one of three-dimensional scanning or liquid, and setting the amount of molten steel in the lookup table by multiplying the obtained volume by the volume of stainless steel,
The setting unit sets a plurality of lookup tables in which the cumulative amount of molten steel is set differently according to the tilting angle of the electric furnace at which tapping of molten steel is detected in advance,
The setting unit calculates the difference between the tapping amount of full tapping and the tapping amount of the tilting angle set in advance after the middle of the previously set steel tapping operation, and completes the prediction of the amount of steel tapping according to whether or not the difference is increased, or the amount of steel tapped by the increased amount. A device for predicting the amount of melted steel in a spout-type electric furnace that is set by increasing the set value of the amount of tapped steel in the lookup table.
delete delete According to claim 1,
The setting unit sets the set value of the lookup table to increase according to the molten steel amount detection value actually measured by the load cell installed below the ladle.
According to claim 4,
Wherein the prediction unit determines the degree of dissolution loss of the refractory in the electric furnace according to the increased set value of the lookup table.
According to claim 1,
The prediction unit controls the tilting angular acceleration of the electric furnace according to the predicted amount of molten steel with reference to the lookup table.
monitoring a tilting angle of the electric furnace by an angle monitoring unit;
detecting whether or not molten steel in the electric furnace is tapped by a tapping detection unit; and
Predicting the amount of molten steel flowing into the ladle by referring to the tilting angle of the electric furnace in which tapping of molten steel was detected by the tapping detection unit in the lookup table in which the setting unit previously set the relationship between the tilting angle and the amount of molten steel of the electric furnace and determining the degree of refractory dissolution in the electric furnace according to the difference between the actually measured amount of molten steel and the predicted amount of molten steel,
In the determining step, the setting unit calculates the difference between the tapping amount of full tapping after the middle of the tapping operation set in advance and the tapping amount of the tilting angle set in advance, and completes the prediction of the amount of steel tapping according to whether or not the difference is increased. , A method for predicting the amount of molten steel in a spout-type electric furnace that is set by increasing the set value of the amount of tapping in the lookup table by an increased amount.
According to claim 7,
In the determining step, the prediction unit controls the tilting angular acceleration of the electric furnace according to the predicted amount of molten steel by referring to the lookup table.
According to claim 7,
In the step of determining, the setting unit sets the setting value of the lookup table to increase according to the molten steel amount detected value actually measured by the load cell installed below the ladle.
According to claim 9,
The determining step is a method of predicting the amount of molten steel in a spout-type electric furnace in which the prediction unit determines the degree of dissolution of the refractory in the electric furnace according to the increased set value of the lookup table.

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