KR20230090691A - Apparatus and method for refining - Google Patents

Abstract

The present invention relates to a refining apparatus and a refining method, and more particularly to a refining apparatus and a refining method for removing impurities contained in a melt.
Refining apparatus according to an embodiment of the present invention, the container portion having an inner space capable of refining the melt; a nozzle unit movably installed toward the inner space and supplying gas to the inner space; A photographing unit for photographing the effluent flowing out of the container unit; And a control unit for receiving the image obtained from the photographing unit, digitizing the amount of the effluent, and controlling the blowing condition of the melt according to the digitized amount of the effluent.

Description

Refining apparatus and refining method {APPARATUS AND METHOD FOR REFINING}

The present invention relates to a refining apparatus and a refining method, and more particularly to a refining apparatus and a refining method for removing impurities contained in a melt.

In general, a steelmaking process proceeds in the order of a molten iron pretreatment process, a converter refining process, a secondary refining process, and a continuous casting process.

In the converter refining process, impurity elements in the molten iron are removed in the form of oxides such as flue gas and slag through a blow refining operation in which hot metal and scrap are charged into the converter and high-purity oxygen gas is blown in through a lance. remove with In the blow tempering operation, the total amount of oxygen to be blown in until the blow tempering is completed is calculated according to the silicon (Si) component in the molten iron, the phosphorus (P) component of the steel type to be produced, and the life of the converter, and oxygen gas corresponding to the calculated total oxygen amount is blown. When this happens, the drilling operation ends.

Conventionally, in proceeding with the blowing operation, the blowing of oxygen gas was controlled according to the situation based on the total amount of oxygen calculated by the blowing agent. However, in this case, there is a problem in that the error range is large because there is a difference in the control method for each trainer. In addition, since it is difficult for the blower to monitor the internal conditions of the converter during the blower operation, slag in the converter is discharged to the outside of the converter together with flue gas, and sloping frequently occurs. In this case, environmental problems are caused, so unlike the blowing pattern set so that sloping does not occur, the blowing operation is operated conservatively and arbitrarily, and the operation outside the set standard proceeds, resulting in deviations in quality. .

KR 10-2004-0049996 A

The present invention provides a refining apparatus and a refining method for automating a blow-up operation.

Refining apparatus according to an embodiment of the present invention, the container portion having an inner space capable of refining the melt; a nozzle unit movably installed toward the inner space and supplying gas to the inner space; A photographing unit for photographing the effluent flowing out of the container unit; And a control unit for receiving the image obtained from the photographing unit, digitizing the amount of the effluent, and controlling the blowing condition of the melt according to the digitized amount of the effluent.

The container part, provided on the side of the first opening for discharging the melted material from the inner space; and a second opening provided on the upper surface for charging the melt into the inner space, wherein the photographing unit includes the container unit so that all of the effluent flowing out from the first opening and the second opening can be included in the captured image. It can be installed spaced apart from the side.

The container part, provided on the side of the first opening for discharging the melted material from the inner space; and a second opening provided on the upper surface to charge the melt into the inner space, wherein the photographing unit is installed on a side of the first opening and captures the effluent flowing out of the first opening. filming department; And it is installed on the side of the second opening, a second photographing unit for photographing the outflow from the second opening; may include.

It may include; a sensor unit for detecting the height of the by-product present in the inner space.

The sensor unit may include an acoustic sensor for detecting an intensity of an acoustic signal.

and a monitoring unit for displaying the state of the storage unit and inputting a control command to the control unit, wherein the control unit may transmit a warning signal through the monitoring unit according to the quantified amount of spillage.

On the other hand, the refining method according to an embodiment of the present invention, the step of charging the melt to the container portion; Initiating blowing of the melt; photographing the container unit and detecting spilled water flowing from the container unit; quantifying the amount of the effluent by using the photographed image; and controlling the blowing conditions of the melt according to the quantified amount of the effluent.

The process of quantifying the amount of the spillage may include setting a target area for digitization in a captured image; and calculating the number of pixels included in the digitization target region and having brightness higher than a reference value.

In the process of calculating the number of pixels, only the number of pixels maintaining brightness higher than a reference value for a set holding time may be calculated.

Prior to the process of detecting the effluent, the process of detecting the height of the by-product present in the container unit; may include.

The process of detecting the height of the by-product may include receiving a sound signal generated on the melt during blowing from the outside of the container unit; and calculating the height of the by-product by detecting the intensity of the received sound signal.

The process of detecting the amount of the effluent includes a process of detecting a first effluent flowing out of a first opening provided on the side of the container part; the process of controlling the blowing condition of the melt includes a digitized first effluent. When the amount of the effluent is greater than or equal to the first set value, a process of changing a blowing method including a gas supply method to the melt; may include.

The process of changing the blowing method may include reducing the amount of gas supplied to the melt; and changing the supply position of the gas to be closer to the molten water surface. may include at least one of them.

Prior to the process of controlling the blowing conditions, when it is confirmed that the amount of the digitized first effluent is greater than or equal to a second set value smaller than the first set value, a step of sending a first warning signal; may include.

The process of controlling the blowing conditions may include: detecting a supply amount of gas supplied to the melt during blowing; And when the total supply amount of the gas supplied to the melt during blowing reaches the first target gas amount set to be supplied during blowing, the step of terminating the blowing of the melt; may include.

The process of detecting the amount of the effluent includes the process of detecting the second effluent flowing out of the second opening provided on the upper surface of the storage unit; and the process of controlling the blowing conditions includes the digitized second effluent. When the amount is greater than the third set value, the process of terminating the blowing of the melt; may include.

Prior to the process of controlling the blowing conditions, when it is confirmed that the amount of the second effluent digitized is greater than or equal to a fourth set value smaller than the third set value, a step of transmitting a second warning signal; may include.

The container unit may include a converter, and the effluent may include converter slag flowing out of at least one of a tap and a furnace of the converter.

According to an embodiment of the present invention, the refining process can be automated by controlling blowing conditions according to the amount of effluent flowing out of the container unit.

That is, it is possible to accurately quantify the amount of effluent flowing out of the storage part from the image of the effluent obtained from the photographing unit, and according to the amount of effluent, by changing the blowing method such as the gas supply method to the melt or by determining the end point of blowing A consistent scouring process can be performed without causing operational variation.

In addition, the sloping phenomenon in which slag is ejected through the furnace hole of the converter is detected before it occurs to prevent the sloping phenomenon, or if the sloping phenomenon occurs despite such preventive measures, it is immediately dealt with to prevent air pollution and operation. Accidents can be prevented.

1 is a diagram schematically illustrating a refining apparatus according to an embodiment of the present invention;
Figure 2 is a view showing the state of supplying a gas to the melt.
3 is a diagram illustrating a state in which a photographing unit converts an acquired image;
4 is a diagram illustrating how the number of pixels is calculated from a photographed image;
5 schematically illustrates a refining method according to a first embodiment of the present invention.
6 schematically shows a refining method according to a second embodiment of the present invention.
7 is a diagram schematically illustrating a refining method according to a third embodiment of the present invention;
8 schematically shows a refining method according to a fourth embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention will not be limited to the embodiments disclosed below, but will be implemented in various different forms, only the embodiments of the present invention will make the disclosure of the present invention complete, and will make the scope of the invention clear to those skilled in the art. It is provided to fully inform you. In order to explain the invention in detail, the drawings may be exaggerated, and like reference numerals refer to like elements in the drawings.

A refining apparatus and a refining method according to an embodiment of the present invention may be an apparatus and method for removing impurities in molten iron by refining molten iron extracted from a blast furnace. Therefore, the molten material described below may include molten iron, and the vessel portion may include a converter into which molten iron is charged and refining the charged molten iron to remove impurity elements. In addition, the first opening provided in the container part may include a tapping hole capable of discharging molten steel from which impurities are removed from the converter, and the second opening provided in the container part may include a furnace hole capable of charging molten iron or the like.

On the other hand, the effluent flowing out of the storage unit may include slag or slag and molten iron flowing out from the converter by a sloping phenomenon to be described later, and the by-product is formed by reacting molten iron and oxygen gas in the internal space of the converter. may contain slag. However, the embodiments of the present invention are not limited thereto, and can be applied to various processes in which effluent can flow out from the container part while removing impurities in the melt.

1 is a view schematically showing a refining apparatus according to an embodiment of the present invention, and FIG. 2 is a view showing a state in which gas is supplied to a melt.

1 and 2, the refining apparatus according to an embodiment of the present invention is installed to be movable toward the container portion 100 having an internal space capable of refining the melt (M), the internal space, The nozzle part 200 for supplying gas to the internal space, the photographing part 300 for photographing the outflow from the container part 100, and the image acquired from the photographing part 300 are input and the A control unit 400 for quantifying the amount of the effluent and controlling the blowing conditions of the melt according to the digitized amount of the effluent.

The container part 100 has an internal space capable of refining the melt (M). Also, the container part 100 may include a first opening 110 and a second opening 120 . That is, the container part 100 is provided on the side of the first opening 110 for discharging the melt (M) from the inner space and the second opening 120 for charging the melt (M) in the inner space provided on the upper surface can include

The nozzle part 200 is movably installed toward the inner space of the container part 100, and supplies gas, for example, oxygen gas, to the inner space. The nozzle part 200 is provided on the upper part of the container part 100 and extends in the vertical direction, and the lower part for injecting gas while the side surface is supported through the support part 210 passes through the second opening 120 of the container part 200. It may be inserted into the inner space of the unit 100 and installed to be movable in the vertical direction. As such, the nozzle unit 200 may include a lance for supplying oxygen gas, and the support unit 210 supporting the side surface of the nozzle unit 200 covers the top of the container unit 100. It is installed and may include an exhaust duct for collecting exhaust gas generated in the inner space of the container unit 100.

When oxygen gas is supplied into the inner space of the container part 100 through the nozzle unit 200, a reaction between the supplied oxygen and the melt, that is, impurities in the molten iron, occurs, and thus the impurities in the molten iron can be removed. That is, oxygen blown in through the nozzle unit 200 reacts with impurities such as silicon (Si), carbon (C), and phosphorus (P) in molten iron to generate oxides, and the generated oxides are discharged as exhaust gas or slag. (slag) can be formed. The generated slag is excluded during the refining process or after the refining process is finished, and the molten material from which impurities are removed or the content of impurities is controlled is called molten steel.

In addition, a bottom blowing nozzle 130 for supplying a gas, for example, an inert gas, may be provided at the bottom of the container part 100 to stir the melt. The bottom blowing nozzle 130 blows an inert gas such as argon (Ar) gas into the container part 100, thereby agitating the melt charged into the container part 100 and improving reactivity.

The photographing unit 300 is provided to photograph the outflow from the container unit 100 .

As described above, when oxygen gas is supplied to the inner space of the container part 100 through the nozzle part 200, the supplied oxygen is supplied as impurities such as silicon (Si), carbon (C), and phosphorus (P) in the molten iron. reacts with it to form oxides. At this time, since silicon dioxide (SiO ₂ ) generated by the reaction of oxygen and silicon (Si) increases the viscosity of the slag, the slag is foamed by the gas supplied through the nozzle unit 200 and the exhaust gas generated thereby. A sloping phenomenon occurs in which it is inflated in the form of foam and ejected to the outside of the container part 100 through the second opening 120, that is, the furnace. Since the sloping phenomenon causes air pollution and deteriorates the working environment, there is a need to respond and suppress it as quickly as possible when the sloping phenomenon occurs. Therefore, in the embodiment of the present invention, in order to automatically detect the occurrence of the sloping phenomenon, the photographing unit 300 photographs the effluent flowing out from the container unit 100, for example, slag or slag and molten iron.

The photographing unit 300 is installed on the outside of the container unit 100 and takes pictures of spilled water flowing out from the first opening 110 and the second opening 120 of the container unit 100 . The sloping phenomenon refers to a phenomenon in which slag flows out from the second opening 120 of the container part 100, that is, the furnace, but before the occurrence of the sloping phenomenon, from the first opening 110 provided on the lower side of the furnace, that is, the tapping port. Slag will leak out. Therefore, when the outflow from the first opening 110, it is expected that the outflow from the second opening 120 immediately, the photographing unit 300 is the first opening 110 and the second opening 120 ) It may be installed spaced apart from the side of the container unit 100 so that all of the outflow from the captured image can be included. The photographing unit 300 may include an infrared camera or a CCD (Charge-Coupled Device) camera, and may be installed on a wall that divides the space where the refining process takes place to photograph the effluent flowing out of the container unit 100. can At this time, the image generated by the photographing unit 300 may be transmitted to the controller 400 to be described later.

As described above, the photographing unit 300 includes one camera, and may simultaneously photograph the spillage flowing out of the first opening 110 and the second opening 120, but on the side of the first opening 110. It is installed on the side of the first photographing unit 310 and the second opening 120 for photographing the outflow from the first opening 110, and the outflow from the second opening 120. It may also include a second photographing unit 320 for photographing. When the photographing unit 300 is installed on the side of the opening at the same height as the opening, it is possible to accurately photograph the spilled water flowing out of the opening from the start of the outflow. However, the height of the first opening 110 provided on the side of the container 100 and the second opening 120 provided on the upper surface of the container 100 are different. Therefore, by arranging the first capturing unit 310 and the second capturing unit 320 at the side at the same height as the first opening 110 and the second opening 120, respectively, the first opening 110 and the second opening 110 It is possible to accurately photograph the spilled water flowing out of the opening 120 from the start of the flowing water.

The refining apparatus according to the embodiment of the present invention may further include a sensor unit 600 for detecting the height of by-products present in the inner space of the container unit 100 . The above-described photographing unit 300 is to photograph the effluent flowing out from the first opening 110 or the second opening 120, and the by-product before flowing out from the container unit 100, that is, slag, is captured only by the photographing unit 300. It is not known what height is formed in the container part 100. Accordingly, the sensor unit 600 may be installed on the top of the container unit 100 to detect the height of the by-products present in the container unit 100 before being discharged.

The sensor unit 600 may include an acoustic sensor that is fixedly installed to the aforementioned support unit 210 and detects the intensity of an acoustic signal generated from the inner space of the container unit 100 . When gas is supplied from the nozzle unit 200, the gas collides with the melt surface of the melt (M) to generate a sound signal. The generated sound signal is detected through the sensor unit 600. The more foamy slag exists in the inner space of the container unit 100, that is, the higher the height of the slag, the higher the sound signal detected by the sensor unit 600. the intensity of is reduced. Accordingly, the amount of decrease in the sound signal can be confirmed through the sensor unit 600, and the control unit 400 predicts the height of the by-product, that is, slag, existing in the internal space of the container part 100 from the amount of decrease in the sound signal. will do

The control unit 400 receives the image generated by the photographing unit 300 and quantifies the amount of the effluent, and controls the blowing condition of the melt according to the digitized amount of the effluent.

The control unit 400 distinguishes between pixels having a brightness equal to or greater than a standard brightness and pixels having a brightness less than the standard brightness in the image generated by the photographing unit 300 . For example, when the brightness of an image is expressed as a numerical value between 0 and 255, the controller 400 controls brightness values greater than or equal to a standard brightness of 185, that is, pixels having brightness values between 185 and 255 and brightness values less than 185, that is, between 0 and 184. It is classified as a pixel having a brightness value of . At this time, the controller 400 may convert pixels having a brightness value equal to or higher than the standard brightness value to a brightness value of 255, which is the maximum brightness value, and convert pixels having a brightness value less than the standard brightness value to a brightness value of 0, which is the minimum brightness value.

3 is a diagram illustrating a state in which a photographing unit converts an acquired image. When an image as shown in FIG. 4 (a) from the photographing unit 300 is input to the control unit 400, the control unit 400 converts the brightness value as shown in FIG. It can be displayed to the user through the unit 500. In this case, the reference brightness value may be set in various ways according to a photographing location and a lens condition of a camera.

The control unit 400 digitizes the amount of spillage from the number of pixels having a brightness equal to or higher than the standard brightness. That is, the control unit 400 identifies a set of pixels having brightness equal to or higher than the standard brightness as the spill, and digitizes the amount of spill by the number of pixels having brightness equal to or higher than the standard brightness.

4 is a diagram illustrating how the number of pixels is calculated from a photographed image. As shown in FIG. 4(a), the control unit 400 determines that a small amount of effluent is leaking from the storage unit 100 when it is detected that 1000 pixels having a brightness equal to or higher than the standard brightness are detected, and FIG. 4( b) As shown in FIGS. 4(c) and 4(d), when the number of pixels having a brightness equal to or higher than the standard brightness increases to 5000, 40000, and 250000, the amount of effluent flowing out from the storage unit 100 It is determined that it increases in proportion to the number of pixels.

The control unit 400 controls the blowing condition of the melt (M) according to the amount of effluent digitized in this way. Here, the control of the blowing conditions may mean all operations of changing the blowing conditions set in advance before starting the blowing or at the start of the blowing. For example, the control of the blowing conditions may be achieved by changing a gas supply method to the melt M, that is, a blowing method, such as changing a preset gas supply amount to the melt M or changing a gas supply position. In addition, the control of the blowing conditions may be made by changing the end point of the preset blowing. That is, the control of the blowing conditions may be accomplished by terminating the blowing of the melt (M) at a time earlier than the end of the blowing, or by ending the blowing of the melt (M) at a time slower than the end of the preset blowing.

That is, the control unit 400 can control the blowing conditions by changing the gas supply method to the melt (M) when the amount of the digitized effluent is greater than or equal to the set value, or by stopping and ending the blowing of the melt (M). For example, the control unit 400 determines the height (h) of the nozzle unit 200 and the amount of gas supplied from the nozzle unit 200 when the discharged water flows out from the first opening 110 in an amount equal to or greater than a set value. (g) can be changed automatically. At this time, it goes without saying that the control unit 400 may automatically change the amount b of the gas supplied from the bottom blowing nozzle 130 . In addition, the controller 400 may automatically end the blowing of the molten material when the amount of the effluent flows out from the second opening 120 in an amount equal to or greater than the set value. Meanwhile, the control unit 400 may transmit a warning signal through the monitoring unit 500 to be described later before the amount of effluent reaches a set value, for example, according to the amount of effluent that has been digitized. Details of the control unit 400 controlling the blowing conditions of the molten material M according to the amount of effluent digitized will be described later together with the refining method according to the embodiment of the present invention.

The monitoring unit 500 may include a human machine interface (HMI) for displaying the state of the storage unit 100 and inputting a control command to the control unit 400 . That is, the monitoring unit 500 may be implemented as a tele-monitoring system (TMS), and the monitoring unit 500 may be implemented in the storage unit 100, that is, the space where the refining process is performed, and, for example, tens to They can be arranged remotely spaced thousands of meters apart.

The monitoring unit 500 may receive the converted image from the control unit 400 and display it to the user or display the number of pixels having a brightness equal to or higher than the standard brightness to the user. In addition, the monitoring unit 500 may visually or audibly deliver the warning signal generated by the control unit 400 to the user, and display various operation information to the user as well.

Also, the monitoring unit 500 may input a user's control command to the control unit 400 . For example, if the user receives only a warning signal and does not want to automatically control the blowing conditions, a control command may be input to the control unit 400 to operate in this way. In addition, the standard brightness for automatically controlling the blowing conditions, the height (h) of the nozzle unit 200 that is changed when controlling the blowing conditions, the amount of gas supplied from the nozzle unit 200 (g), and the low blowing nozzle 130 It goes without saying that a control command may be input so that the control unit 400 operates in a setting desired by the user by inputting the amount (b) of gas supplied from ).

Hereinafter, a refining method according to an embodiment of the present invention will be described. The refining method according to the embodiment of the present invention may be a method of refining the melt using a refining device, and since the above information regarding the refining device may be applied as it is, duplicate descriptions will be omitted.

5 is a diagram schematically illustrating a refining method according to a first embodiment of the present invention.

Referring to Figure 5, the refining method according to the first embodiment of the present invention, the process of charging the melt (M) to the container portion 100 (S110), the process of starting the blowing of the melt (M) (S120 ), the process of photographing the container part 100 and detecting the outflow from the container part 100 (S130), the process of digitizing the amount of the outflow using the photographed image (S140), and digitization Depending on the amount of the effluent, a process of controlling the blowing conditions of the melt (M) (S150) is included.

In the loading process (S110) into the container part 100, the molten material M is charged into the container part 100. Here, the molten material M may include molten iron, and the container unit 100 may include a converter into which molten iron is charged and refining the charged molten iron to remove impurity elements. At this time, the container part 100 is formed with a first opening 110 provided on the side and a second opening 120 provided on the upper surface, and in the process of charging the container part 100 (S110), the melt (M) is charged into the inner space of the container part 100 through the second opening 110.

The process of starting the blowing (S120) starts blowing by supplying gas, for example, oxygen gas, to the internal space of the container part 100 to the nozzle part 200 provided on the top of the container part 100. The nozzle unit 200 as described above may be installed to be movable in the vertical direction from the top of the container unit 100 .

A process of detecting the height of by-products present in the container unit 100 after the process of initiating blowing (S120) may be performed. The process of detecting the height of the by-product may be performed before the process of detecting the effluent (S130), which will be described later, and the process of detecting the height of the by-product receives an acoustic signal generated on the melt during blowing from the outside of the container part 100. and calculating the height of the by-product by detecting the intensity of the received acoustic signal.

As described above, the sensor unit 600 fixedly installed to the support unit 210 may be provided outside the container unit 100 . The sensor unit 600 includes an acoustic sensor and detects the intensity of the acoustic signal. When the gas is supplied from the nozzle part 200 in the process of starting the blowing (S120), the gas collides with the molten material M to generate a sound signal. The intensity of the sound signal detected by the sensor unit 600 decreases as the amount of slag in the form increases. Accordingly, after receiving the sound signal generated on the melt M through the sensor unit 600 from the outside of the container part 100, the control unit 400 detects the intensity of the received sound signal to determine the decrease in the sound signal. The height of the by-product, that is, the slag present in the inner space of the container unit 100 is predicted.

In the step of detecting spillage (S130), the storage unit 100 is photographed by the photographing unit 300, and spillage flowing from the storage unit 100 is sensed. Here, the photographing unit 300 may include an infrared camera or a CCD camera, and in the process of detecting the spillage (S130), one camera is used to view the first opening 110 and the second opening 120. A first photographing unit 310 for simultaneously photographing the spilled water or a photograph of the water flowing out of the first opening 110 and a second photographing unit for photographing the water flowing out of the second opening 120 By placing the unit 320 on the side of the first opening 110 and the second opening 120, respectively, the outflow from the first opening 110 and the second opening 120 may be separately photographed.

In the step of quantifying the amount of spillage (S140), the amount of spillage is digitized using an image captured by the photographing unit 300. In this case, the step of quantifying the amount of spillage (S140) may include setting a target region for digitization in the captured image and a step for calculating pixels included in the target region for digitization and having higher brightness than a reference value.

In the process of setting the target area for digitization, the target region for digitization, which is an area for detecting leakage of spillage in the captured image, is set. For example, in the case of simultaneously photographing the outflow from the first opening 110 and the second opening 120 with one photographing unit 300, the captured image includes the outflow from the first opening 110. An area where water can be sensed and an area where spillage flowing out from the second opening 120 can be sensed coexist. Accordingly, the control unit 400 distinguishes between an area in which spillage flowing out from the first opening 110 can be detected and an area where spillage flowing out from the second opening 120 can be detected in the captured image, A digitization target region for digitizing the amount of spillage flowing out from the first opening 110 and a digitization target region for digitizing the amount of spillage flowing out from the second opening 120 are respectively set. In addition, a process of setting a digitization target area even when simultaneously photographing the outflow from the first opening 110 and the second opening 120 through the first capturing unit 310 and the second capturing unit 320 this can be done That is, even when the spillage flowing out of the first opening 110 and the second opening 120 is photographed through the first photographing unit 310 or the second photographing unit 320, each photographed image has Since the surrounding area other than the area where the spillage flowing out from the first opening 110 or the second opening 120 can be detected may be included, in order not to quantify the amount of spillage in this unnecessary surrounding area, the area to be digitized is selected. A setting process may be performed.

The process of calculating the number of pixels calculates the number of pixels included in the digitization target region and having brightness higher than a reference value. That is, in the process of calculating the number of pixels, the controller 400 distinguishes between pixels having a brightness greater than or equal to a standard brightness and pixels having a brightness less than the standard brightness. For example, when the brightness of an image is expressed as a numerical value between 0 and 255, the controller 400 controls brightness values greater than or equal to a standard brightness of 185, that is, pixels having brightness values between 185 and 255 and brightness values less than 185, that is, between 0 and 184. It is divided into pixels having a brightness value of , and the number of pixels having brightness equal to or greater than the standard brightness of 185 is calculated. At this time, the process of calculating the number of pixels may calculate only the number of pixels for which a brightness higher than a reference value, that is, a reference brightness, is maintained for a set holding time. In the case of pixels whose standard brightness is maintained for less than the set holding time, they correspond to fine particles momentarily emitted from the storage unit 100 by gas supply through the nozzle unit 200, and the first opening 110 or the second opening 110 Since it does not occur from the effluent 100 continuously flowing out from the second opening 120, the process of calculating the number of pixels can calculate only the number of pixels whose brightness is higher than the reference brightness for a set holding time. .

The process of controlling the blowing conditions (S150) controls the blowing conditions of the melt (M) according to the amount of quantified effluent, that is, the number of pixels for which brightness is maintained higher than the reference brightness. In the process of controlling the blowing conditions (S150), the control unit 400 changes the gas supply method to the melt (M) when the amount of the quantified effluent is greater than the set value, or stops and ends the blowing of the melt (M). Blowing conditions can be controlled.

For example, in the process of controlling the blowing conditions (S150), when the amount of the first outflow flowing out from the first opening 110 provided on the side of the container part 100 is equal to or greater than the first set value, the nozzle part 200 By reducing the amount of oxygen gas supplied to the melt (M) through, or by moving the nozzle unit 200 downward to change the supply position of the oxygen gas so as to approach the melting surface of the melt (M) Blowing method can be changed At this time, the process of reducing the amount of oxygen gas and the process of changing the supply position of the oxygen gas may be performed simultaneously, and the amount of gas supplied from the bottom blowing nozzle 130 may also be reduced. On the other hand, if it is confirmed that the amount of the first effluent digitized before changing the blowing method is equal to or greater than the second set value smaller than the first set value, it is of course possible to send out a first warning signal.

In addition, the process of controlling the blowing conditions (S150), when the amount of the second outflow flowing out from the second opening 120 provided on the upper surface of the container portion 100 is greater than the third set value, the blowing of the melt (M) can be terminated At this time, if it is confirmed that the amount of the second effluent digitized before the end of the blowing of the melt (M) is greater than the fourth set value smaller than the third set value, of course, a second warning signal may be sent out. In this way, in the first embodiment of the present invention, it is possible to automatically control the blowing condition of the melt (M) in the refining process according to the amount of effluent digitized.

7 is a diagram schematically illustrating a refining method according to a second embodiment of the present invention.

Referring to FIG. 7 , the refining method according to the second embodiment of the present invention can be applied to change the blowing method by detecting the amount of the first effluent flowing out through the first opening 110 .

Since the process of charging the melt (S210) is the same as in the first embodiment of the present invention described above, redundant descriptions will be omitted.

The process of starting the blowing (S220) starts blowing by supplying gas, for example, oxygen gas, to the internal space of the container part 100 to the nozzle part 200 provided on the top of the container part 100.

When blowing is initiated, a process of detecting the amount (g) of gas supplied from the nozzle unit 200 (S230-A) is performed. In general, in the blowing operation, the total amount (L) of oxygen gas to be supplied from the nozzle unit 200 during blowing is set in advance. Thus, when the blowing is started, the amount of gas supplied from the nozzle unit 200 (g) continuously detects whether or not the total amount of oxygen gas (L) to be supplied from the nozzle unit 200 is reached during blowing.

Thereafter, a process of comparing the amount (g) of gas supplied from the nozzle unit 200 during blowing and the total amount (L) of oxygen gas to be supplied from the nozzle unit 200 during blowing (S230-B) is performed. At this time, when the amount (g) of gas supplied from the nozzle unit 200 during blowing is less than the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, the amount of gas supplied from the nozzle unit 200 (g) ) is continuously detected. However, when the amount (g) of the gas supplied from the nozzle unit 200 during blowing exceeds the total amount (L) of the oxygen gas to be supplied from the nozzle unit 200, that is, the amount supplied from the nozzle unit 200 during blowing When the amount of gas (g) reaches the total amount (L) of the oxygen gas to be supplied from the nozzle unit 200, a process of terminating the blowing (S240) is performed.

After the process of starting the blowing (S220), before the process of ending the blowing (S240), the process of detecting the first effluent (S230-C) is performed. Here, the process of changing the blowing method described below from the process of detecting the first effluent (S230-C) (S230I) may be performed simultaneously with the process of detecting the amount (g) of the gas described above (S230-A). there is. That is, the process of changing the blowing method described below from the process of detecting the first outflow (S230-C) (S230I) is the amount of gas while the process of detecting the amount (g) of gas (S230-A) is in progress. It may be performed separately from the process of detecting (g) (S230-A).

The process of detecting the first spillage (S230-C) may be performed by detecting the spillage flowing out of the first opening 110 provided on the side of the storage unit 100, which is performed by the first capturing unit 310. It can be made by photographing the outflow from the first opening 110 through the. After the spill flowing out of the first opening 110 is photographed, a process of quantifying the amount of the first spill through the photographed image (S230-C) may be performed. Here, since the process of digitizing the amount of the first effluent (S230-C) is the same as in the first embodiment of the present invention, duplicate descriptions will be omitted.

Thereafter, a process of comparing the digitized amount of the first effluent P1 with the preset first set value K1 (S230-H) is performed. At this time, when the digitized amount of the first effluent (P1) is equal to or greater than the preset first set value (K1), the blowing method is changed, and the digitized amount of the first effluent (P1) is the preset first set value. If it is less than (K1), the process of detecting the first spill (S230-C) is performed again.

Prior to the process of comparing the digitized amount P1 of the first effluent with the first set value K1 (S230-H), the digitized amount P1 of the first effluent was set to a second value smaller than the first set value K1. A process of comparing with the set value K2 (S230-E) may be performed. If the digitized amount of the first effluent (P1) is smaller than the second set value (K2), the process of detecting the first effluent (S230-C) is continuously performed, and the digitized amount of the first effluent (P1) When the value is greater than or equal to the second set value K2, a process of generating a first warning signal (S230-G) may be performed. At this time, generation of the first warning signal may be performed after a process of confirming whether the first warning signal has already been generated before the set time (t1) (S230-F). For example, if the time t1 set to check whether the first warning signal has already been generated is 30 seconds, even if the amount P1 of the digitized first effluent is equal to or greater than the second set value K2, the previous 30 seconds If the first warning signal has already been generated within the first warning signal is not repeatedly generated because the warning signal has already been transmitted to the user. However, if the first warning signal has not been generated within the previous 30 seconds when the amount P1 of the digitized first effluent is greater than the second set value K2, the process of immediately generating the first warning signal (S230-G ) is performed.

When the amount P1 of the digitized first effluent is equal to or greater than the first preset value K1, a process of changing the blowing method (S230-I) is performed. Here, the process of changing the blowing method (S230-I) reduces the amount of oxygen gas supplied to the melt (M) through the nozzle unit 200, or moves the nozzle unit 200 downward to increase the amount of oxygen gas. It may be performed by changing the gas supply method, such as changing the supply position to be closer to the molten material M. The sloping phenomenon can be prevented through such a change in the gas supply method, and it is confirmed that the digitized amount of the first effluent P1 is equal to or greater than the preset first set value K1 despite the change in the gas supply method. If continuously changing the blowing method causes operational variation, the process of changing the blowing method (S230-I) is preferably performed only once.

Even when the amount (g) of gas supplied from the nozzle unit 200 reaches the total amount (L) of oxygen gas to be supplied from the nozzle unit 200 during blowing without changing the blowing method, or the blowing method is changed, the blowing method When the amount (g) of gas supplied from the nozzle unit 200 reaches the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, a process of terminating the blowing (S240) is performed.

8 is a diagram schematically illustrating a refining method according to a third embodiment of the present invention.

Referring to FIG. 8 , the scouring method according to the third embodiment of the present invention may be applied to determine an end point of blowing by detecting the amount of the second effluent flowing out through the second opening 120 .

Since the process of charging the melt (S210) and the process of starting the blowing (S220) are the same as in the second embodiment of the present invention described above, overlapping descriptions will be omitted.

When blowing is initiated, a process of detecting the amount (g) of gas supplied from the nozzle unit 200 (S230-A) is performed. When blowing is initiated, it is continuously detected whether the amount of gas supplied from the nozzle unit 200 (g) reaches the total amount of oxygen gas (L) to be supplied from the nozzle unit 200 during blowing.

Thereafter, a process of comparing the amount (g) of gas supplied from the nozzle unit 200 during blowing and the total amount (L) of oxygen gas to be supplied from the nozzle unit 200 during blowing (S230-B) is performed, When the amount (g) of the gas supplied from the nozzle unit 200 during blowing is less than the total amount (L) of the oxygen gas to be supplied from the nozzle unit 200, the amount (g) of the gas supplied from the nozzle unit 200 Continuously detecting, when the amount (g) of gas supplied from the nozzle unit 200 during blowing is greater than the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, the process of ending the blowing (S240) is carried out

After the process of starting the blowing (S220), before the process of ending the blowing (S240), the process of detecting the second outflow (S230-J) is performed. Here, the process of comparing the quantity P2 of the second effluent, which is digitized from the process of detecting the second effluent (S230-J) to the third set value K3 (S230-O), is the It may be performed simultaneously with the process of detecting the amount (g) (S230-A). That is, the process of detecting the second outflow (S230-J) and the process of comparing with the third set value (K3) described later (S230-O) is the amount of gas (g) before the process of ending the blowing (S240) It may be performed separately from the process of detecting (S230-A).

The process of detecting the second spillage (S230-J) may be performed by detecting the spillage flowing out of the second opening 110 provided on the upper surface of the storage unit 100, which is performed by the second capturing unit 320. It can be made by photographing the outflow from the second opening 110 through the. After the spill flowing out of the second opening 120 is photographed, a process of quantifying the amount of the second spill through the photographed image (S230-K) may be performed. Here, since the process of quantifying the amount of the second effluent (S230-K) is the same as in the first embodiment of the present invention, duplicate descriptions will be omitted.

Thereafter, a process of comparing the digitized amount of the second effluent (P2) with the preset third set value (K3) (S230-O) is performed. At this time, when the amount (P2) of the digitized first effluent is equal to or greater than the preset third set value (K3), the process of ending the blowing (S240) is performed. That is, when the amount (P2) of the digitized first outflow is equal to or greater than the preset third set value (K3), the amount (g) of the gas supplied from the nozzle unit 200 is supplied from the nozzle unit 200 during blowing. Even if less than the total amount of oxygen gas to be (L), the process of ending the blowing (S240) is performed.

On the other hand, before the process of comparing the amount P2 of the digitized second effluent with the third set value K3 (S230-O), the amount P2 of the digitized second effluent is smaller than the third set value K3. A process of comparing with the fourth set value K4 (S230-L) may be performed. If the digitized amount of the second effluent (P2) is smaller than the fourth set value (K4), the process of detecting the second effluent (S230-J) is continuously performed, and the digitized amount of the second effluent (P2) If the value is greater than or equal to the fourth set value K4, a process of generating a second warning signal (S230-N) may be performed. At this time, the generation of the second warning signal may also be performed after the process of checking whether the second warning signal has already been generated before the set time (t2) (S230-M), thereby avoiding the repeated generation of the second warning signal. can

The amount (P2) of the digitized second outflow is greater than or equal to the third preset value (K3), or the amount (g) of oxygen gas supplied from the nozzle unit 200 during blowing is the total amount of oxygen gas to be supplied during blowing ( When reaching L), the process of ending the blowing (S240) is performed.

9 is a diagram schematically illustrating a refining method according to a fourth embodiment of the present invention.

Referring to FIG. 9 , the refining method according to the fourth embodiment of the present invention detects the amounts of the first and second effluent flowing out through the first opening 110 and the second opening 120, respectively. However, it can be applied to determine the blowing method and the end point of blowing.

Since the process of charging the melt (S210) and the process of starting the blowing (S220) are the same as in the second and third embodiments of the present invention described above, overlapping descriptions will be omitted.

When blowing is initiated, a process of detecting the amount (g) of gas supplied from the nozzle unit 200 (S230-A) is performed. When blowing is initiated, it is continuously detected whether the amount of gas supplied from the nozzle unit 200 (g) reaches the total amount of oxygen gas (L) to be supplied from the nozzle unit 200 during blowing.

Thereafter, a process of comparing the amount (g) of gas supplied from the nozzle unit 200 during blowing and the total amount (L) of oxygen gas to be supplied from the nozzle unit 200 during blowing (S230-B) is performed, When the amount (g) of the gas supplied from the nozzle unit 200 during blowing is equal to or greater than the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, the process of ending the blowing (S240) is performed.

At this time, after the process of starting the blowing (S220) and before the process of ending the blowing (S240), the process of detecting the first effluent (S230-C) is performed. As described above in the second embodiment of the present invention, the process of changing the blowing method described later from the process of detecting the first outflow (S230-C) (S230I) is the process of detecting the amount (g) of gas ( While S230-A) is in progress, it may be performed separately from the process of detecting the amount (g) of gas (S230-A). In addition, since the process of changing the blowing method (S230I) to be described later from the process of detecting the first effluent (S230-C) may be performed in the same manner as described above in the second embodiment of the present invention, redundant Description is omitted.

On the other hand, after the process of starting the blowing (S220), before the process of ending the blowing (S240), the process of detecting the second outflow (S230-J) is performed. Here, the process of comparing the amount of the second effluent (P2) digitized from the process of detecting the second effluent (S230-J) with the third set value (K3) (S230-O) is the amount of the above-mentioned gas ( g) may be performed simultaneously with the process of detecting (S230-A). In addition, in the step of comparing the amount P2 of the second effluent, which is digitized from the step of detecting the second effluent (S230-J), with the third set value (K3) (S230-O), It may be performed separately from the process of sensing (S230-C) and the process of changing the blowing method (S230I) to be described later. Meanwhile, the process of comparing the amount P2 of the second effluent digitized from the process of detecting the second effluent (S230-J) with the third set value K3 (S230-O) is the third implementation of the present invention. Since it can be performed in the same manner as described above in the example, redundant description thereof will be omitted.

Here, when the amount (g) of gas supplied from the nozzle unit 200 during blowing without changing the blowing method reaches the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, or the blowing method is changed When the amount (g) of gas supplied from the nozzle unit 200 during blowing also reaches the total amount (L) of oxygen gas to be supplied from the nozzle unit 200, the process of ending the blowing (S240) is performed . On the other hand, even when the amount (g) of oxygen gas supplied from the nozzle unit 200 during blowing does not reach the total amount (L) of oxygen gas to be supplied during blowing, the amount (P2) of the digitized second outflow is set in advance. When the third set value (K3) or more, the process of ending the blowing (S240) is performed.

In this way, according to an embodiment of the present invention, the refining process can be automated by controlling the blowing conditions according to the amount of effluent flowing out of the storage unit.

That is, it is possible to accurately quantify the amount of effluent flowing out of the storage part from the image of the effluent obtained from the photographing unit, and according to the amount of effluent, by changing the blowing method such as the gas supply method to the melt or by determining the end point of blowing A consistent scouring process can be performed without causing operational variation.

In addition, the sloping phenomenon in which slag is ejected through the furnace hole of the converter is detected before it occurs to prevent the sloping phenomenon, or if the sloping phenomenon occurs despite such preventive measures, it is immediately dealt with to prevent air pollution and operation. Accidents can be prevented.

In the above, although preferred embodiments of the present invention have been described and illustrated using specific terms, such terms are only intended to clearly explain the present invention, and the embodiments and described terms of the present invention are the technical spirit of the following claims. And it is obvious that various changes and changes can be made without departing from the scope. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, and should be said to fall within the scope of the claims of the present invention.

100: container part 110: first opening
120: second opening 200: nozzle part
300: photographing unit 310: first capturing unit
320: second capturing unit 400: control unit
500: monitoring unit 600: sensor unit

Claims (18)

A container part having an inner space capable of refining the melt;
a nozzle unit movably installed toward the inner space and supplying gas to the inner space;
A photographing unit for photographing the effluent flowing out of the container unit; and
Refining apparatus comprising a; control unit for receiving the image acquired from the photographing unit, digitizing the amount of the effluent, and controlling the blowing condition of the molten material according to the digitized amount of the effluent. The method of claim 1,
The container part,
A first opening provided on a side surface to discharge melt from the inner space; and
It includes; a second opening provided on the upper surface for charging the melt into the inner space;
the filming unit,
A refining device installed to be spaced apart from the side of the container unit so that all of the effluent flowing out of the first opening and the second opening can be included in the captured image. The method of claim 1,
The container part,
A first opening provided on a side surface to discharge melt from the inner space; and
It includes; a second opening provided on the upper surface for charging the melt into the inner space;
the filming unit,
a first photographing unit installed at a side of the first opening and photographing the outflow from the first opening; and
and a second photographing unit installed at a side of the second opening to photograph the effluent flowing out of the second opening. The method of claim 1,
Refining apparatus comprising a; sensor unit for detecting the height of the by-product present in the inner space. The method of claim 4,
The sensor unit includes an acoustic sensor for detecting an intensity of an acoustic signal. The method of claim 1,
A monitoring unit for displaying the state of the storage unit and inputting a control command to the control unit;
The control unit,
Refining device for sending a warning signal through the monitoring unit according to the amount of effluent quantified. The process of charging the molten material to the container unit;
Initiating blowing of the melt;
photographing the container unit and detecting spilled water flowing from the container unit;
quantifying the amount of the effluent by using the photographed image; and
A refining method comprising: controlling blowing conditions of the melt according to the amount of the effluent quantified. The method of claim 7,
The process of quantifying the amount of the effluent,
Setting a target area for digitization in the captured image; and
and calculating the number of pixels included in the digitization target region and having brightness higher than a reference value. The method of claim 8,
The process of calculating the number of pixels,
A refinement method that calculates only the number of pixels whose brightness is higher than a reference value for a set holding time. The method of claim 7,
Prior to the process of detecting the effluent,
Refining method comprising a; step of detecting the height of the by-products present in the container unit. The method of claim 10,
The process of detecting the height of the by-product,
Receiving a sound signal generated on the melt during blowing from the outside of the container unit; and
A refinement method comprising: calculating the height of a by-product by detecting the intensity of the received acoustic signal. The method of claim 7,
The process of detecting the amount of the effluent is,
A step of detecting a first outflow flowing out of a first opening provided on a side surface of the container unit; includes,
The process of controlling the blowing conditions of the melt,
A refining method comprising: changing a blowing method including a gas supply method to the melt when the amount of the quantified first effluent is equal to or greater than the first set value. The method of claim 12,
The process of changing the blowing method,
reducing the amount of gas supplied to the melt; and
changing the supply position of the gas to be closer to the molten water surface; A refining method comprising at least one of The method of claim 12,
Before the process of controlling the blowing conditions,
and transmitting a first warning signal when it is confirmed that the amount of the digitized first effluent is greater than or equal to a second set value smaller than the first set value. The method of claim 7,
The process of controlling the blowing conditions,
Step of detecting the supply amount of the gas supplied to the melt during blowing; and
When the total amount of gas supplied to the melt during blowing reaches a first target gas amount set to be supplied during blowing, step of terminating the blowing of the melt; Refining method comprising a. The method according to any one of claims 7 to 15,
The process of detecting the amount of the effluent is,
Including; detecting a second outflow flowing out of a second opening provided on the upper surface of the container unit;
The process of controlling the blowing conditions,
Refining method comprising: terminating the blowing of the melt when the amount of the digitized second effluent is greater than or equal to the third set value. The method of claim 16
Before the process of controlling the blowing conditions,
and transmitting a second warning signal when it is confirmed that the amount of the digitized second effluent is greater than or equal to a fourth set value smaller than the third set value. The method of claim 16
The container unit includes a converter,
The effluent includes converter slag flowing out of at least one of a tap and a furnace of the converter.

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