KR20200055286A - Determining apparatus the point of input of slag making agent and determining method the point of input of slag making agent and electric arc furnace operation method thereby - Google Patents

Abstract

The present invention relates to an apparatus for determining auxiliary material input to an electric furnace, a method for determining a timing of auxiliary material input to an electric furnace, and a steelmaking operation method using the same, which measures vibrations generated in a body of the electric furnace and notifies a timing of auxiliary material input based on the measured vibrations in order to improve the efficiency of auxiliary material input; checks the scrap melting state of the electric furnace to accurately determine a point of time when melt pool is formed so as to accurately determine a timing of additional charge of scrap; and accurately checks a timing of heater changeover in the furnace body to control the operation of a burner and a lance, thereby uniformly melting the entire scrap and improving the input efficiency of auxiliary energy.

Description

DETERMINING APPARATUS THE POINT OF INPUT OF SLAG MAKING AGENT AND DETERMINING METHOD THE POINT OF INPUT OF SLAG MAKING AGENT AND ELECTRIC ARC FURNACE OPERATION METHOD THEREBY}

The present invention relates to an apparatus for determining the input of auxiliary raw materials into an electric furnace, a method for determining the timing of inputting the auxiliary raw materials into an electric furnace, and a steelmaking operation method using the same, more specifically, to determine the state of scrap melting during operation of the electric furnace by vibration of the furnace body, The present invention relates to an apparatus for determining an input of an auxiliary raw material into an electric furnace, a method for determining an input timing of an auxiliary raw material into an electric furnace, and a steelmaking operation method using the same, depending on the melting state of the scrap.

Generally, an electric furnace refers to a melting furnace that melts scrap by generating heat from an electric furnace. And, this melting process is called steelmaking.

Moreover, an electric furnace is a furnace that heats iron scrap (hereinafter scrap), which is a molten material by using electric heat, and flows an electric current from the electrode portion to the scrap in an arc form to heat the scrap.

For reference, the general driving process of the electric furnace having the above-described configuration is as follows.

First, charging of the scrap is made into the interior of the electric furnace. Here, the scrap is charged into the interior of the furnace body by a crane or other method in a state where the cover part provided on the upper part of the furnace body is opened. Then, after the scrap is loaded into the interior of the furnace body, the cover is coupled to the upper portion of the furnace body, and current is supplied to the electrode portion to dissolve the scrap provided inside the furnace body.

In the steelmaking operation of the electric furnace, the situation of scrap melting in the furnace is invisible to the black box, and the melting state of scrap is inevitably judged by an auxiliary indicator.

Therefore, operation control such as subsidiary materials (quicklime, dolomite, and charcoal), additional scrap loading, and heater tap switching are controlled according to the dissolved state of the scrap. Since it is used, it is uniformly applied to the solubility according to scraps charged for each steel operation heat, and thus, the efficiency of the steel operation is deteriorated.

If the starting point of the sub-raw material is late, a molten steel pool is already formed in the furnace. Until then, a significant amount of (FeO) exists because C is insufficient due to the injection of a supersonic burner and slag is not formed at the same time. For this reason, at the same time as the input of the auxiliary raw material, the input C and FeO react violently, and the furnace is in a state covered with flame, that is, a carbon boil state.

Quicklime is floating on the surface of the molten steel. If a high flow rate oxygen jet is used in the state before slag, quicklime (CaO) is attached to the wall or scraps near the wall as a splash, and its melting point is high, so dissolution is extremely high. It becomes difficult.

If the input of the preparation is late, the formation of slag is slow, so if it is not injected earlier, the thermal efficiency of the end of injection or the furnace wall protector cannot be improved. Also, quick lime or dolomite is scattered by the reaction of carbon (C) and adheres to the furnace wall.

As a prior patent related to the present invention, Korean Patent Registration No. 10-1748961 'Method for predicting the dissolution time of an electric furnace' (Registration on June 13, 2017) has been proposed.

However, Korean Registered Patent No. 10-1748961 'Method for predicting the melting time of an electric furnace' (registered on June 13, 2017) calculates the total amount of power required during the melting and refining of the electric furnace process, and calculates the total required The amount of power (MWh) is divided into the amount of power required for the melter (MWh) and the amount of power required for the refiner (MWh); The step of estimating the dissolution time by summing the required dissipation power factor of the melter forming the required power amount (MWh) is simply predicting the dissolution time.

Korean Registered Patent No. 10-1748961 'Method for predicting the melting time of an electric furnace' (registered on June 13, 2017) simply predicts the melting time, and it has not been able to check in real time the melting state of scrap in the electric furnace steelmaking operation.

(Priority patent) Korean Registered Patent Publication No. 10-1748961 'Method for predicting the melting time of electric furnace' (registered on June 13, 2017)

An object of the present invention is to measure the vibration generated in the furnace body of the electric furnace, and to notify the timing of the input of the auxiliary raw material based on the measured vibration, to determine the input of the auxiliary raw material to the electric furnace to improve the input efficiency of the sub-material, to determine the timing of the auxiliary raw material input to the electric furnace It is to provide a method, a method of manufacturing steel using the same.

In addition, another object of the present invention is to accurately determine the additional charging time of the scrap by checking the scrap melting state of the electric furnace, accurately grasping the scrap melting state of each part in the furnace body, and controlling the operation of the burner and the lance to uniformly dissolve the scrap as a whole. It is to provide a steelmaking operation method and an electric furnace that can improve the input efficiency of auxiliary energy.

In order to achieve the above object, the present invention is mounted on the furnace body of the electric furnace, the vibration sensor unit for detecting vibration generated in the furnace body during operation of the furnace, and electrically connected to the vibration sensor unit to measure vibration detected by the vibration sensor unit It provides a device for determining the input of the auxiliary raw material to the electric furnace, characterized in that it comprises a steelmaking operation control unit to determine the time when the input of the auxiliary raw material to receive the value.

In the present invention, when the vibration measurement value detected by the vibration sensor unit is smaller than a preset vibration value, the steelmaking operation control unit may determine that the auxiliary material is input.

In the present invention, the vibration sensor unit is located in a plurality of spaced apart in the circumferential direction to the iron shell of the furnace body, the steelmaking operation control unit vibration measurement value detected by at least two vibration sensor units of the plurality of vibration sensor unit than the preset vibration value If it is small and is maintained for a predetermined time, it can be judged as the time when the auxiliary raw material is added.

The present invention can provide a device for determining auxiliary material input to an electric furnace further comprising a notification unit that is electrically connected to the steelmaking operation control unit and notifies the external material input time point to the outside when the auxiliary material input time is confirmed.

In order to achieve the above object, the present invention is a vibration detection step of real-time detecting the vibration generated in the furnace body during the operation of the electric furnace, and receiving the vibration measurement values detected in the vibration detection step in real time to determine the input time of the auxiliary material. It provides a method for determining the input of the auxiliary material to the electric furnace, characterized in that it comprises a step of determining the input of the auxiliary material.

In the present invention, the sub-injection plate step may be determined as the timing of sub-injection when the vibration measurement value measured by at least two vibration sensor units among the plurality of vibration sensor units mounted on the furnace body is equal to or less than a preset vibration value.

In the present invention, in the step of determining the input of the auxiliary material, vibration measurement values detected by at least two vibration sensor units among the plurality of vibration sensor units are smaller than a predetermined vibration value and vibration measurement values smaller than a predetermined vibration value are maintained for a predetermined time. In this case, it can be judged as the time when the auxiliary raw material is added.

The present invention may provide a method for determining the input of the auxiliary raw material into the electric furnace, further comprising a step of informing the starting point of the auxiliary raw material to externally notify the starting point of the auxiliary raw material identified in the step of determining the auxiliary raw material input.

In order to achieve the above object, the present invention is a first vibration detection step for real-time sensing of vibration generated in a furnace body during operation of an electric furnace, and receiving the vibration measurement values detected in the vibration detection step in real time to input auxiliary materials. It provides a method for operating the steelmaking of an electric furnace, characterized in that it comprises a first sub-injection step of determining and injecting the auxiliary raw material into the furnace body.

The present invention is a first power input step of injecting a predetermined power into the electric furnace after the first sub-injection step, the additional charge of scrap to charge additional scrap after the first power input step, the vibration generated in the furnace body is detected in real time The second vibration detection step, the vibration detection value detected in the vibration detection step is received in real time to determine the timing of the input of the auxiliary raw material, and the second auxiliary raw material input step of injecting the auxiliary raw material into the furnace body, and after the second auxiliary raw material input step to the electric furnace It is possible to provide a steelmaking operation method for an electric furnace further comprising a second power input step of inputting predetermined power and a heating step of injecting oxygen within the second power input step and adding a carburizing agent to increase the temperature of molten steel. have.

In the present invention, the first sub-material input step and the second sub-material input step measure vibrations in which vibration measurement values detected by at least two vibration sensor units among a plurality of vibration sensor units are smaller than a preset vibration value and smaller than a preset vibration value. If the value is maintained for a predetermined period of time, it is judged as the time when the auxiliary material is added, and the auxiliary material can be immediately injected into the furnace body.

In the present invention, the additional charge of the scrap may be additionally charged when the solubility of the scrap is confirmed to be 80% or more by checking the vibration measurement value detected by the vibration sensor after the first power input step.

In the present invention, in the heating step, when the solubility of the molten steel is confirmed to be 95% or more by the vibration measurement value detected by the vibration sensor unit, oxygen is blown into the main body of the electric furnace with an oxygen injection lance, and a carbonizing agent is supplied through a coal injection device. It is possible to form a slag by putting in, and a heater to increase the temperature of molten steel can be made.

In the present invention, the first sub-injection step includes a first sub-injection point notification process for informing the outside of the identified sub-subsidiary input point to the outside, and the second sub-injection step is a second for informing the identified sub-sub-material input point to the outside. It may include a notification process when the auxiliary material is added.

The present invention measures the vibration generated in the furnace body of the electric furnace, and notifies the timing of input of the sub-material based on the measured vibration, thereby improving the input efficiency of the sub-material, intercepting the main raw material input unit, and prematurely inserting the arc by slag making. By improving the efficiency, the energy input efficiency can be improved together.

In addition, the present invention accurately determines the time when the molten steel pool is formed by checking the scrap melting state of the electric furnace to accurately determine the additional charging time of the scrap, and the burner and the lance are operated by accurately checking the time of switching the heater in the furnace body. By controlling, it is possible to uniformly dissolve the scrap as a whole and improve the input efficiency of auxiliary energy.

1 is a schematic view showing an embodiment of an apparatus for determining the input of auxiliary ingredients into an electric furnace according to the present invention.
Figure 2 is an overall step diagram showing an embodiment of the steelmaking operation of the electric furnace using the method for determining the input of the auxiliary material to the electric furnace according to the present invention.

If described in detail by the accompanying drawings, preferred embodiments of the present invention. Prior to the detailed description of the present invention, terms or words used in the present specification and claims described below should not be interpreted as being limited to a conventional or dictionary meaning. Therefore, the configuration shown in the embodiments and drawings described in this specification are only the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, and thus can replace them at the time of application. It should be understood that there may be equivalents and variations.

1 is a schematic diagram showing an embodiment of an apparatus for determining the input of auxiliary ingredients into an electric furnace according to the present invention, the apparatus for determining the input of auxiliary ingredients into an electric furnace according to the present invention is mounted on the furnace body 110 of the electric furnace 100 and is operating the electric furnace. It includes a vibration sensor unit 200 for detecting the vibration generated in the furnace body (110).

The electric furnace 100 may include a furnace body 110 and a plurality of electrodes 120, and may include a lance device 130 that injects oxygen, carbon, or oxygen and carbon into it, and is more detailed in a known structure. Note that the description is omitted.

The vibration sensor unit 200 is an example that is mounted on the iron shell of the furnace body 110, and detects vibration generated in the furnace body 110 in real time during the operation of the electric furnace.

Then, the vibration sensor unit 200 is electrically connected to the steelmaking operation control unit 300 and transmits the vibration measurement value detected in real time to the steelmaking operation control unit 300.

The steelmaking operation control unit 300 receives the vibration measurement value sensed by the vibration sensor unit 200 in real time, determines the solubility state of scrap during electric furnace operation according to the change in the vibration measurement value, and supplements the raw material according to the melting state of the scrap. Judging when to input.

When scrap is melted during the operation of the electric furnace, when the scrap on the inner circumferential surface of the furnace wall is dissolved and a pool is formed at the bottom of the electrode 120, slag is formed on the molten steel, and vibration generated in the furnace wall is attenuated.

The apparatus for judging the input of the auxiliary raw material into the electric furnace according to the present invention reduces the vibration caused by the arc to the furnace wall formed on the molten steel when the scrap is melted and scraps while checking the change in the damped vibration value in real time with the vibration sensor unit 200 Determine the dissolved state of.

In the steelmaking operation control section 300, the vibration value at the time of input of the auxiliary material according to the vibration value generated in the furnace 110 during operation of the electric furnace is preset and stored, and the solubility of scrap, that is, the amount of the first scrap is dissolved It turns out that the solubility of the scrap can be checked according to the vibration measurement value measured through the vibration sensor unit 200 because the amount of molten steel is pre-stored.

During the operation of the electric furnace, the amount of slag formed on molten steel changes according to the melting state, that is, the amount of slag increases as the solubility of molten steel increases.

As the amount of slag increases, the vibration generated in the furnace body 110 gradually decreases during the operation of the electric furnace, and the steelmaking operation control unit 300 is an auxiliary material when the vibration measurement value detected by the vibration sensor unit 200 is smaller than the preset vibration value. Judging from the time of input.

In addition, the steelmaking operation control unit 300 determines that the auxiliary raw material is input when a vibration measurement value smaller than a preset vibration value detected by a plurality of vibration sensor units including a timer is maintained for a predetermined time.

The steelmaking operation control unit 300 includes a display for operation management so that the operation manager can view and manage the operation process through a screen.

Vibration sensor unit 200 is located in a plurality of spaced apart in the circumferential direction to the iron shell of the furnace body 110, the steelmaking operation control unit 300 is detected by at least two vibration sensor unit 200 of the plurality of vibration sensor unit 200 When the measured vibration value is smaller than the preset vibration value and is maintained for a predetermined time, it is judged as the starting point of the auxiliary raw material to improve the accuracy of the starting point of the auxiliary raw material.

The apparatus for judging the input of the auxiliary raw material into the electric furnace according to the present invention may further include a notification unit 400 that is electrically connected to the steelmaking operation control unit 300 and notifies the outside when the input timing of the auxiliary raw material is confirmed.

The notification unit 400 may include a speaker unit for notifying the timing of inputting the auxiliary material by voice or a lamp unit for emitting light to notify the timing of the input of the auxiliary material, in addition to text on the screen of the operation management display for managing steelmaking operations by electricity. It is noted that it is possible to output and notify, etc., and it can be implemented in various modifications using known notification means.

In addition, the steelmaking operation control unit 300 is electrically connected to the auxiliary material input device, and when the starting point of the auxiliary material input is confirmed by the steelmaking operation control unit 300, the auxiliary material input device is operated to input the auxiliary material into the furnace body 110.

In addition, the steelmaking operation control unit 300 additionally charges the scrap into the furnace body 110 by inputting predetermined power through the electrode 120 into the electric furnace 100 at the time of inputting the auxiliary raw material and then operating the scrap charging device.

In addition, the apparatus for determining input of an auxiliary material into an electric furnace according to the present invention may further include a slag forming measuring unit connected to the vibration sensor unit 200 to measure the forming thickness of the slag.

The slag forming measuring unit can check the forming thickness of the slag, that is, the forming height, from the vibration measurement value measured in real time from the vibration sensor unit 200 to check in real time the slag forming operation state according to the input of auxiliary materials, and input additional power and scrap It is possible to accurately determine the timing of additional purchases.

That is, the method for determining the input of the auxiliary raw material into the electric furnace according to the present invention is a vibration detecting step of real-time detecting vibration generated in the furnace body 110 during the operation of the electric furnace, and receiving the vibration measurement value detected in the vibration detecting step in real time to receive the auxiliary raw material It includes the step of determining the input of the auxiliary raw material to determine the time of input.

In the vibration detection step, the vibration value of the arc generated in the furnace body 110 is measured in real time through the outer surface of the furnace body 110, that is, the vibration sensor unit 200 installed on the skin.

In the step of inputting the auxiliary raw material, when the vibration measurement value of the furnace body 110 is equal to or less than the preset vibration value, it is determined as the starting point of the auxiliary raw material.

In the step of inputting the auxiliary raw material, if the vibration measurement values measured by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 mounted on the furnace body 110 are equal to or less than a preset vibration value, it is determined as the timing of adding the auxiliary raw materials.

In addition, in the auxiliary material input determination step, vibration measurement values detected by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 are smaller than a preset vibration value and vibration measurement values smaller than a preset vibration value are preset. If it is maintained for a period of time, it is judged as the time when the auxiliary raw material is added.

The method for judging the input of the auxiliary raw material into the electric furnace according to the present invention may further include a notification of the auxiliary raw material input starting time for notifying the external raw material input starting point identified in the auxiliary raw material input determination step to the outside.

As an example, in the step of notifying the timing of inputting the auxiliary raw material, the operation timing of the auxiliary raw material is notified to the operation manager by voice or light.

It should be noted that, in addition to the step of informing the timing of inputting the auxiliary raw material, a text or the like may be output on the screen of the operation management display for managing the steelmaking operation by electricity, and various modifications may be performed using a known notification means.

Figure 2 is an overall step view showing an embodiment of a steelmaking operation method of the electric furnace using the method for determining the input of the auxiliary material into the electric furnace according to the present invention, referring to Figures 1 and 2 the steelmaking operation method of the electric furnace according to the present invention The first vibration detection step (S100), which detects the vibration generated in the furnace body 110 in real time during the operation of the electric furnace, receives the vibration measurement values detected in the first vibration detection step (S100) in real time, and determines the timing of the input of auxiliary ingredients. It includes a first sub-injection step (S200) of judging and injecting the auxiliary raw material into the furnace body 110.

In the first auxiliary raw material input step (S200), when the vibration measurement value of the furnace body 110 is equal to or less than the preset first vibration value, it is determined as the starting point of the auxiliary raw material.

In addition, in the first part raw material input step (S200), the vibration measurement values measured by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 mounted on the furnace body 110 are equal to or less than a preset first vibration value. In this case, it is judged as the timing of the input of subsidiary materials.

In addition, in the first sub-material input step (S200), vibration measurement values detected by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 are smaller than a preset vibration value and smaller than a preset first vibration value. When the vibration measurement value is maintained for a predetermined time, it may include a process of determining the starting point of the auxiliary raw material (S210) and a step of introducing the auxiliary raw material into the furnace body 110 as soon as the starting point of the auxiliary raw material is determined (S220).

In addition, the first sub-injection step (S200) may include a first sub-injection time notification process for notifying the identified sub-injection point externally. An example is to notify the timing of input.

In addition, it is revealed that the first sub raw material input point notification process may be notified by outputting text and the like on the display of the operation management display that manages the steelmaking operation by electricity, and by using various notification means. Put it.

In addition, the steelmaking operation method of the electric furnace according to the present invention is a first power input step (S300) and a first power input step (S300) for inputting predetermined power to the electric furnace 100 after the first sub-material input step (S200). It may further include a scrap additional charging step (S400) for additionally loading the scrap.

The first power input step (S300) is a preset power input to the corresponding electric furnace 100 after input of the first auxiliary raw material.

In addition, the first power input step (S300) is to dissolve the additionally charged scrap, and the scrap additional charge step (S400) is the first power input step (S300) after the first power input step (S300) vibration measurement value detected by the vibration sensor unit 200. If the solubility of the scrap is confirmed to be 80% or higher, additional scrap is charged.

The additional scrap loading step (S400) checks the solubility of the scrap while measuring the vibration of the furnace body 110 due to the arc in real time with the vibration sensor unit 200. When the solubility of the scrap is confirmed to be 80% or more, additional scrap is charged. do.

That is, in the steelmaking operation method of the electric furnace according to the present invention, when it is confirmed that molten scrap has been melted to form a molten steel pool, the subsidiary material input device is immediately operated to inject the subsidiary material into the electric furnace body, and after a certain amount of power is applied, scrap is added. Charge.

In the steelmaking operation method of the electric furnace according to the present invention, the molten state of the scrap is checked in real time through vibration measurement values measured by the vibration sensor unit, and it is precisely determined when the molten steel pool is formed, thereby forming early slag. The slag forming by can be maintained.

In addition, in the steelmaking operation method of the electric furnace according to the present invention, the vibration detection values detected in the second vibration detection step (S500) and the second vibration detection step (S500) in real time to detect the vibration generated in the furnace body 110 in real time. It includes the second sub-injection step (S600) to determine the timing of the input of the auxiliary raw material received by the delivery and injecting the auxiliary raw material into the furnace body 110.

In the second auxiliary raw material input step (S600), when the vibration measurement value of the furnace body 110 is equal to or less than the preset second vibration value, it is determined that the auxiliary raw material is input.

In addition, in the second part raw material input step (S600), vibration measurement values measured by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 mounted on the furnace body 110 are equal to or less than a preset second vibration value. In this case, it is judged as the timing of the input of subsidiary materials.

In addition, in the second sub raw material input step (S600), vibration measurement values detected by at least two vibration sensor units 200 among the plurality of vibration sensor units 200 are smaller than a preset vibration value and smaller than a preset second vibration value. When the vibration measurement value is maintained for a predetermined time, it may include a process of determining the starting point of the auxiliary raw material (S610) and a step of introducing the auxiliary raw material into the furnace body 110 as soon as the starting point of the auxiliary raw material is determined (S620).

In addition, the second sub raw material input step (S600) may include a second sub raw material input starting time notification process to notify the outside of the identified sub raw material input time, and the second sub raw material input starting time notification process may be provided by voice or light to the assistant manager. An example is to notify the timing of input.

In addition, it is revealed that the second part raw material input point notification process may be notified by outputting letters and the like on the display of the operation management display that manages the steelmaking operation by electricity, and by using various notification means. Put it.

In addition, oxygen is blown into the second power input step (S700) and the second power input step (S700) to input predetermined power to the electric furnace 100 after the second auxiliary raw material input step (S600), and the carburizing agent is added. It may further include a heating step (S800) to increase the temperature of the molten steel by injecting.

In the heating step (S800), when the solubility of molten steel is confirmed to be 95% or more by the vibration measurement value detected by the vibration sensor unit 200, oxygen is blown into the furnace body 110 by the lance device 130 and powdered coal is introduced. It is possible to form a slag by injecting a carbonizing agent through the device 700, and to achieve a heater that increases the temperature of the molten steel.

One embodiment of the electric furnace steelmaking operation method according to the present invention may further include a steelmaking step (S900) of checking and temperature of the molten steel in the furnace body 110 after the heating step (S800).

The present invention measures the vibration generated in the furnace body of the electric furnace, and notifies the timing of input of the sub-material based on the measured vibration, thereby improving the input efficiency of the sub-material, intercepting the main raw material input unit, and prematurely inserting the arc by slag making. By improving the efficiency, the energy input efficiency can be improved together.

In addition, the present invention accurately determines the time when the molten steel pool is formed by checking the scrap melting state of the electric furnace to accurately determine the additional charging time of the scrap, and the burner and the lance are operated by accurately checking the time of switching the heater in the furnace body. By controlling, it is possible to uniformly dissolve the scrap as a whole and improve the input efficiency of auxiliary energy.

The present invention is not limited to the above-described embodiments, but can be implemented by variously changing within a range not departing from the gist of the present invention, and it is revealed that it is included in the configuration of the present invention.

100: electric furnace 110: furnace body
120: electrode 130: lance device
200: vibration sensor unit 300: steelmaking operation control unit
400: notification unit
S100: first vibration detection step
S200: 1st raw material input stage
S300: 1st power input phase
S400: Additional charge for scrap
S500: Second vibration detection step
S600: Secondary raw material input stage
S700: Second power input phase
S800: heating stage
S900: Lecture stage

Claims (14)

A vibration sensor unit mounted on the furnace body of the electric furnace and detecting vibration generated in the furnace body during operation of the electric furnace; And
An apparatus for determining auxiliary material input to an electric furnace, comprising a steelmaking operation control unit electrically connected to the vibration sensor unit to receive a vibration measurement value sensed by the vibration sensor unit to determine a timing of inputting the auxiliary material into the electric furnace. The method according to claim 1,
The steelmaking operation control unit determines the auxiliary material input into the electric furnace to determine the auxiliary material input time when the vibration measurement value detected by the vibration sensor unit is smaller than a preset vibration value. The method according to claim 1,
The vibration sensor unit is located in a plurality of spaced apart in the circumferential direction to the iron shell of the furnace body,
When the vibration measurement value detected by at least two of the vibration sensor units among the plurality of vibration sensor units is smaller than a preset vibration value and is maintained for a predetermined period of time, the steelmaking operation control unit determines that the auxiliary raw material input to the electric furnace is determined as the starting point of the auxiliary raw material input. Device. The method according to claim 1,
An apparatus for judging the input of the auxiliary raw material into the electric furnace further comprising a notification unit that is electrically connected to the steelmaking operation control unit and notifies the external of the auxiliary raw material when the auxiliary raw material input time is confirmed. A vibration detection step of detecting vibration generated in the furnace body in real time during the operation of the electric furnace; And
Method for determining the input of the auxiliary raw material to the electric furnace, comprising the step of determining the input of the auxiliary raw material to determine when to receive the vibration measurement value detected in the vibration detection step in real time. The method according to claim 5,
In the step of inputting the auxiliary raw material, the method for determining the auxiliary raw material input to the electric furnace is determined when the vibration measurement value measured by at least two vibration sensor units among the plurality of vibration sensor units mounted on the furnace body is equal to or less than a preset vibration value. The method according to claim 5,
In the step of determining the input of the auxiliary raw material, if the vibration measurement value detected by at least two vibration sensor units among the plurality of vibration sensor units is smaller than the preset vibration value and the vibration measurement value smaller than the preset vibration value is maintained for a predetermined period of time, the auxiliary raw material input is input. A method for judging the input of subsidiary materials into an electric furnace, judged at a point in time. The method according to claim 5,
A method for determining auxiliary material input to an electric furnace, further comprising an auxiliary material input point notification step of notifying the external time of the auxiliary material input identified in the auxiliary material input determination step. A first vibration detection step of detecting vibration generated in the furnace body in real time during the operation of the electric furnace; And
A steelmaking operation method for an electric furnace comprising a first sub-material input step of receiving the vibration measurement value detected in the vibration detection step in real time to determine a timing of input of the sub-material and injecting the sub-material into the furnace body. The method according to claim 9,
A first power input step of inputting predetermined power to the electric furnace after the first sub-material input step;
A scrap additional charging step for additionally charging scrap after the first power input step;
A second vibration detection step of sensing vibration generated in the furnace body in real time;
A second sub-material input step of receiving the vibration measurement value detected in the vibration detection step in real time to determine a time point for adding the sub-material and injecting the sub-material into the furnace body;
A second power input step of inputting predetermined power to the electric furnace after the second sub-material input step; And
A method for steelmaking in an electric furnace, further comprising a heating step in which oxygen is blown in after the second power input step, and a carbonizing agent is added to increase the temperature of the molten steel. The method according to claim 10,
The first auxiliary raw material input step and the second auxiliary raw material input step,
If the vibration measurement value detected by at least two vibration sensor units of the plurality of vibration sensor units is smaller than the preset vibration value and the vibration measurement value smaller than the preset vibration value is maintained for a predetermined period of time, it is determined as a time point for the input of the auxiliary material and immediately A steelmaking operation method for an electric furnace that injects auxiliary materials into the furnace body. The method according to claim 10,
The additional scrap loading step,
A method of steelmaking operation of an electric furnace for additionally loading scrap when the solubility of the scrap is confirmed to be 80% or more by checking the vibration measurement value detected by the vibration sensor unit after the first power input step. The method according to claim 10,
In the heating step, when the solubility of molten steel is confirmed to be 95% or more by the vibration measurement value detected by the vibration sensor unit, oxygen is blown into the body of the electric furnace with an oxygen injection lance, and a carburizing agent is introduced through a coal injection device. A steelmaking operation method of an electric furnace that forms a slag and makes a heater to raise the temperature of molten steel. The method according to claim 10,
The first auxiliary raw material input step includes a notification process of the first auxiliary raw material input time to notify the externally of the identified auxiliary raw material input time,
The second auxiliary raw material input step includes the second auxiliary raw material input starting time notification process to notify the outside of the identified auxiliary raw material input time to the steelmaking operation method of the electric furnace.

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