TW528853B - Method for measuring slag layer thickness, and method and apparatus for measuring surface level positions of slag layer and molten metal layer surface - Google Patents

Abstract

The object of the present invention is to provide a slag layer thickness measuring method used for converters and the like, featured by less error and low cost, a molten metal layer surface level position measuring method using the slag layer thickness measuring method, and a device using them. By the use of the fact that the electrical properties of a molten steel layer filled in a vessel for a converter or the like, a slag layer floating on the surface of the molten steel layer, and the atmosphere occupying the upper layer of the slag layer differ from each other, the electrode is moved upward from the molten metal layer to the atmosphere layer through the slag layer, and changes in electrical properties produced between the electrode and the vessel during the upward movement are captured to measure the thickness of the slag layer from the distance traveled by the electrode.

Description

528853 A7 B7 V. Description of the invention (彳) [Technical field to which the invention belongs] The present invention relates to a method for measuring the thickness of the slag layer or the thickness of the slag layer and the horizontal position of the surface of the molten metal layer, and a device for measuring the same. [Background Art] In a converter used for pig iron refined steel generated in a melting furnace, in order to control the refining, it is necessary to measure the thickness of a slag layer floating on the surface of the molten steel. Therefore, it is used: a method for determining the thickness of the slag layer by measuring the difference in resistance of the molten steel, slag, and the atmosphere by using one or two electrodes; and using the induced voltage of the electromagnetic coil in the molten steel, slag Slag and the atmosphere are different methods to obtain the thickness of the molten hawthorn layer. However, the measurement method using the difference in impedance creates a problem that the connection impedance of the spear-type connector supporting the electrode cannot be ignored, and the error is large. The method using an electromagnetic coil creates the need to prevent the electromagnetic wire from being immersed in molten steel. Damage and the device becomes large and expensive. The present invention is an invention made to solve such a problem, and it is intended to provide a method for measuring the thickness of a slag layer and a measuring device thereof with small errors and low costs, and a method and a method for measuring a horizontal position of a molten metal surface using these principles. Device. [Disclosure of the invention] The molten steel of the container filled with the converter and the like is the main component of the molten metal. For the electrical characteristics of the metal that shows its electrical conductivity, it floats on the surface of the molten steel. When the electrode is immersed in it, we can know that the paper size is applicable to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) (Please read the precautions on the back before filling this page)

Line 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy -4- A7 528853 _ B7 V. Description of the invention (2) Shows the characteristics of 7K as a battery. In addition, the atmospheric system which occupies the upper layer of the slag layer is well known, and has insulating properties as electrical characteristics. The present invention is an invention made by paying attention to these points, and it is intended to measure the thickness of the slag layer by using the electrical characteristics shown in the smelting layer to make the molten steel in the lower layer different from the atmosphere in the upper layer. Since the electrical characteristics shown in the above slag layer are not limited to molten steel and are applicable to molten metal, the present invention is directed to molten metal. The first slag thickness measuring method of the present invention is specifically the following method. That is, a method for measuring the thickness of a slag layer is to measure the thickness of the slag layer of the molten metal floating on the surface of the molten metal layer, and is characterized in that the electrode is moved upward from the molten metal layer through the slag layer. In the atmosphere that occupies the upper layer of the slag layer, the electrode characteristics between the container having conductivity and the electrode after the molten metal is housed is the electrode-to-vessel characteristic, and it is detected that the electrode-to-vessel characteristic is According to the intermediary conductivity of the molten metal layer when the electrode sinks into the molten metal layer, the time between the movement of the electrode to the slag layer and the operation of the interstitial layer of the slag layer to act as an electrolyte is generated. The point is the time point at which the molten metal-slag interface passes; after the electrode is separated from the slag layer to the atmospheric layer, the electrode-container characteristic is shifted from the power generation property to the insulation property according to the intervening of the atmospheric layer. That is, the passing time point of the slag-atmosphere interface; and the passing time point of the molten metal-slag interface to the aforementioned slag -At the time point at which the air interface passes, the moving distance of the electrode is measured as the thickness of the slag layer. Fig. 1 is an explanatory diagram showing the principle of the first method for measuring the thickness of a slag layer. In Figure 1, the series 1 container, the series 2 molten metal layer, and the series 3 slag are applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). L --- ^ ------ ·- (Please read the notes on the back before filling this page)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ____ — -I 528 853 A7 B7 V. Description of the invention (3) Layer, 4 series atmosphere, 5 series electrodes. The slag layer 3 is an electrolyte as described above, and shows characteristics as a chemical battery when an electrode is immersed therein. This is because the cations (S i 2 +, P 2 +, etc.) and the anions (02-) in the molten slag are used to transfer and receive electrons through the electrodes and generate electricity. This first method for measuring the thickness of the slag layer is to move the electrode 5 from the molten metal layer 2 through the slag layer 3 to the atmosphere, and to use the electrical characteristics between the electrode 5 and the container 1 between the electrode 5 and the container 1 Changes in characteristics are measured by measuring the thickness of the slag layer 3. Figure 1 is an explanatory diagram of this measurement method. Containers 1 such as converters containing molten metal are generally formed by stacking refractory bricks on the inside of a metal container. The container 1 does not have conductivity, but the molten metal is contained in the container 1 and adheres to the container 1 according to the metal. The inner surface of the container 1 is conductive between the inner surface of the container 1 and the ground. That is, the container is formed with conductivity. Therefore, the electrical characteristics between the electrode 5 and the ground can be used to investigate the electrical characteristics between the containers 1, that is, the electrode-to-container characteristics. In this case, when the electrode 5 is located in the molten metal layer 2 (a) in FIG. 1, since the molten metal layer 2 is in a molten state of the metal, the electrode-container characteristic is conductivity. When the electrode 5 moves to the slag layer 3 (b), the electrode-to-vessel characteristics are as described above, and become power generation. When the electrode 5 moves to the atmosphere 4 through the slag layer 3 (c), the atmosphere is interposed and the electrode-container characteristics become insulating. Therefore, when the electrode 5 is moved upward from the molten metal layer 2 to the atmospheric layer 4, it is detected that the electrode 5 is changed by the melting of the boundary surface between the molten metal layer 2 and the slag layer 3 due to the change in the electrode-container characteristics from conductivity to power generation. The metal-slag interface passes time point 7; and the electrode 5 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page). Printed by the Consumer Affairs Cooperative of the Property Bureau-6-528853 Λ7 Α7 Β7 V. Description of the invention (4) The slag-atmosphere on the boundary surface of the slag layer 3 and the atmosphere 4 changed from the power generation property to the insulation by the characteristics of the electrode-container The interface passes through the time point 8 between which the thickness of the slag layer 3 can be known by the distance that the measuring electrode 5 moves up. In the above-mentioned first method for measuring the thickness of a slag layer, the electrode 5 is moved upward, but the electrode may be moved downward. The second method for measuring the thickness of the slag layer in this case is a method for measuring the thickness of the slag layer of the molten metal floating on the surface of the molten metal layer, and is characterized in that the electrode is formed by occupying the upper layer of the slag layer. The atmospheric layer descends and moves to the molten metal layer through the slag layer, and monitors the electrode characteristics between the conductive container and the electrode after the molten metal is contained, that is, the electrode-to-vessel characteristics, and detects that this electrode- The inter-vessel characteristics are based on the dielectric insulation of the atmosphere when the electrode is in the atmospheric layer, and moved to the point in time when the electricity generation property of the slag layer that operates as an electrolyte after the electrode sinks into the slag layer is Atmospheric-slag interface passing time point; the electrode moves from the slag layer to the molten metal layer, and the electrode-container characteristic is shifted from the power generation property to the time point according to the conductivity of the molten metal layer That is, the slag-molten metal interface passage time point, from the aforementioned atmospheric-slag interface passage time point to the slag-molten metal boundary By the time point, measures the movement distance of the moving electrode, the thickness of the slag layer. In the case of the second method for measuring the thickness of a slag layer, the electrode is moved downward from the atmosphere to the molten metal layer through the slag layer, and it is detected that the electrode changes from the insulation between the electrode and the container to a power-generating atmosphere and slag layer. This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) ~ -7- (Please read the precautions on the back before filling this page), 1T line

Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economics Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economics 528853 A7 B7 V. Description of the invention (5) The time point at which the atmospheric-slag interface at the boundary surface passes; The time at which the slag-molten metal interface at the boundary surface of the slag layer and the molten metal layer changes from the power generation property to the conductive property, and the distance between the electrode moving down and the electrode moving up The thickness of the slag layer can be obtained in the same manner. According to the first method for measuring the thickness of the slag layer or the method for measuring the thickness of the second slag layer, the electrical characteristics between the electrode and the container, that is, changes in the characteristics between the electrode and the container, that is, conductivity, power generation, or insulation Changes in each property were measured. This change is not due to changes in impedance of the same nature, but changes in different nature, so you can clearly understand the changes and accurately measure the thickness of the slag layer. In addition, since the electrode itself is not expensive, it can be exchanged every time it is measured, and it is not necessary to perform damage prevention steps on the electrode. Therefore, according to these methods for measuring the thickness of the slag layer, a low-cost melt can be provided. Slag layer thickness determination method. It is possible to detect the passage time of the molten metal-slag interface in the first method for measuring the thickness of the slag layer and the method for measuring the thickness of the second volume and the layer in the above-mentioned method by measuring the potential of the electrode of the container. The method for measuring the thickness of the slag layer at the point of time, the passage time of the melting-atmosphere interface, or the passage time of the slag-molten metal interface. First, the third method for measuring the thickness of the slag layer according to this method is the above-mentioned method for measuring the thickness of the first slag layer. Between the electrode and the container, a DC power source V cc with the electrode side as the cathode side is inserted. I paper size applies Chinese National Standard (CNS) A4 specification (210X 2 ^^ ------ -8-(Please read the precautions on the back before filling this page)

528853 A7 B7 V. Description of the invention (6) This power supply is connected in series with the impedance RX, and the 値 of the aforementioned DC power supply and the aforementioned impedance RX is set to use the potential of the aforementioned container as a reference when the aforementioned electrode sinks into the aforementioned slag layer. The potential of the electrode is higher than the reference potential, and the electrode is moved from the molten metal layer to the atmospheric layer, and the potential of the electrode with respect to the reference potential is measured. It is detected that the potential of the electrode is The point in time when the reference potential changes to the high potential is the passage time of the molten metal-slag interface; the point in time when the potential of the electrode changes from the high potential to a lower potential lower than the reference potential is the melting point. The slag-atmosphere interface passes through time. Fig. 2 is an explanatory diagram showing the structure of a measuring device used in the third method for measuring the thickness of a slag layer. Figure 2 shows the installation: between electrode 5 and container 1 in Figure 1, a DC power supply V cc 1 with the electrode 5 side as the cathode is inserted, and the impedance RX 1 2 connected in series with this power supply 1 1 is measured for container 1 The potential of the electrode 5, that is, the potential measuring means 13 of the voltage between the electrode 5 and the container 1. Here, the system of the DC power source 11 and the impedance R X 1 2 is set such that when the electrode sinks into the slag layer, the potential of the electrode 5 using the potential of the container 1 as the reference potential is higher than the reference potential. Figure 3 shows the isostatic circuit of Figure 2. In Fig. 2, the movement of the electrode 5 in the molten metal layer 2, the slag layer 3, or the atmosphere 4 is the same as that of the changeover switch 19 in Fig. 3 from an electrical point of view. That is, when the electrode 5 is located in the molten metal layer 2 (a), since the molten metal layer 2 is a molten state of the metal, the electrode-container characteristic is conductive. This paper applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) (Please read the notes on the back before filling this page)

Printed on line 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -9-528853 A7 B7__ 5. Description of the invention (7), so the short circuit state between the electrode 5 and the container 1 is formed by the molten metal layer 2. When the electrode 5 moves to the slag layer 3 (b), the battery characteristics are displayed because the slag layer 3 is an electrolyte. Between the electrode 5 and the container 1, a battery having an electric power of E 0 and an internal impedance of R 0 is formed. The connection is the same, instead of the slag layer 3. When the electrode 5 is located in the atmospheric layer 4 (c), because the atmosphere is insulating, the space between the electrode 5 and the container 1 is opened through the atmospheric layer 4. (A) to (c) of Fig. 4 show the equivalent circuit in each of these cases. That is, in FIG. 2, the potential of the container 1 is used as the reference potential 0 (V), and when the electrode 5 is located in the molten metal layer 2 (a), in the slag layer 3 (b), or in the atmospheric layer 4 ( c) When the potentials of the electrodes 5 for the respective reference potentials are Va, Vb, Vc, these are respectively shown in (a) to (c) in FIG. 4, and va = 〇 (v) (reference potential), Vb = (EoRx — VccRo) (V), Vc = -Vcc (V) (low potential lower than the reference potential). Here, V b in FIG. 4 (b) is a voltage set by the aforementioned DC power source V cc and the impedance RX. For the reference potential, that is, the potential of the container 1, is a higher potential than the reference potential. The ground in the figure (b) forms a positive potential. Generally, since the RX coefficient is in the range of one hundred thousand ohms (ki 1 ο · 〇hm), the internal resistance R 〇 of the battery characteristics shown in the slag layer 3 ranges from several tens to several hundreds of ohms, so FIG. 4 As shown in (b), Vb is approximately equal to E0. Since the power system is anode to ground, V b is positive. Using the above-mentioned measuring circuit, the electrode 5 is made of molten metal layer 2. This standard is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) 1 ~ -10-(Please read the precautions on the back before filling in this Page) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 528853 at B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (8) When the slag layer 3 moves up to the atmosphere 4 When the potential is the potential of the electrode 5 as the reference potential, it is formed as shown in FIG. 5. The measurement was started at the time point T a. When the electrode 5 is located in the molten metal layer 2, (a) is V a and 0 (V). At the time Tb when the electrode 5 is moved from the molten metal layer 2 to the slag layer 3, that is, the time point at which the molten metal-slag interface passes, is Vb and has a positive potential. Moreover, the electrode 5 moves from the slag layer 3 to the T c time point of the atmospheric layer 4, that is, the passing time point at the slag-atmosphere interface, V c is −Vcc (V) and has a negative potential. Therefore, if the time point at which the potential of the detection electrode 5 changes from 0 (V) to a positive potential, that is, the time point at which the reference potential changes to a higher potential than the reference potential, a molten metal-slag interface is detected At the time point, if the time point at which the potential of the electrode 5 changes from a positive potential to a negative potential, that is, the time point at which the high potential higher than the reference potential changes to the low potential lower than the reference potential, a slag is formed. Atmospheric interface passes through time. Therefore, based on these detections, the thickness of the slag layer 3 can be obtained by determining the moving distance of the electrode 5 by using the passing time from the molten metal-slag interface to the slag-atmosphere interface. . In the third method for measuring the thickness of the slag layer, the electrode is moved up, but the measurement can also be performed on the same principle when the electrode is moved down. The fourth method for measuring the thickness of the slag layer in this case is the above-mentioned method for measuring the thickness of the second slag layer. Between the electrode and the container, a DC power source V cc with the electrode side as the cathode side is inserted in series with the power source. Impedance RX, and the 値 of the aforementioned DC power supply and the aforementioned impedance RX, when the aforementioned electrode sinks into the aforementioned slag layer, set the potential of the aforementioned container to LIL ------ f (Please read the precautions on the back first (Fill in this page again)

、 1T line • Γ. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -11-528853 A7 B7 V. Description of the invention (9) The potential of the aforementioned electrode as the reference potential is higher than the aforementioned reference potential The potential of the electrode is lowered from the atmospheric layer to the molten metal layer, the potential of the electrode with respect to the reference potential is measured, and it is detected that the potential of the electrode is changed from a lower potential lower than the reference potential to The time point of the high potential is the passage time point of the atmosphere-slag interface; the time point when the potential of the electrode changes from the high potential to the reference potential is the time point of the slag-molten metal interface passage time. According to the above-mentioned method for measuring the thickness of the third slag layer or the method for measuring the thickness of the fourth slag layer, the change in the electrode potential is toward the reference potential, a high potential higher than the reference potential, and a low potential lower than the reference potential. One of the potential changes can be detected digitally, so it can accurately detect the change. Based on these detections, the moving distance of the electrode can be accurately obtained, and the slag layer can be accurately known. thickness. In addition, since the contact resistance of a connector or the like connected to the electrode is used, even if the impedance between the electrode and the container changes, the change in the potential of the electrode is toward the reference potential, a high potential higher than the reference potential, and a lower potential than the reference potential. It is said that the above-mentioned measurement method is a method that is not easily affected by the change in impedance between the electrode and the container due to a change in one of the low potentials. In the above-mentioned methods for measuring the thickness of the slag layer 1, 2, 3, or 4, the electrode moving distance is directly measured, but the moving speed of the electrode may be set to be constant, and the passage time point from the atmosphere-slag interface may be measured. Movement time of the electrode to the passage time point of the slag-molten metal interface, or movement time of the electrode from the passage time point of the molten metal-slag interface to the passage time of the slag-atmosphere interface, thereby moving At this time, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page) Printed by the Intellectual Property Bureau Staff Consumer Cooperative of the Ministry of Economic Affairs-12- 528853 A? B7 V. Description of the invention (y (please read the precautions on the back before filling this page) and the moving speed of the electrode to calculate the moving distance of the electrode. That is to say, the fifth method for measuring the thickness of the slag layer is the above-mentioned In the first, second, third, or fourth slag layer thickness measurement method, the moving speed of the ascending or descending movement of the electrode is set constant, and The method of moving the molten metal layer to the atmospheric layer is to measure the movement time of the electrode from the molten metal-slag interface passage time point to the molten slag-atmosphere interface passage time point, and use the electrode to descend from the atmospheric layer. In the case of the method of moving to the molten metal layer, the movement time of the electrode from the time point at which the atmosphere-slag interface passes to the time point at which the slag-molten metal interface passes is measured. In time, the movement distance of the electrode is calculated by calculation instead of measuring the movement distance of the electrode. According to this method, it is not necessary to directly measure the movement distance of the electrode, and the measurement method becomes simple. It was printed by the Consumer Cooperative of the Bureau and the explanation of the slag layer thickness measuring device of the present invention is described below. First, the first slag layer thickness measuring device is an electrode; it is provided with a molten metal containing a slag layer floating on the surface of the molten metal layer. Conductive container; and the aforementioned electrode is melted by the aforementioned Electrode moving means for the metal layer to rise and move to the atmosphere occupying the upper layer of the slag layer, or to move from the atmosphere to the molten metal layer through the slag layer; and between the electrode and the container, insert the electrode The DC power source V cc on the cathode side is the impedance RX in series with this power source, and the 直流 between the DC power source and the impedance RX is set to form the potential of the container as a reference potential when the electrode sinks into the slag layer. The potential of the aforementioned electrode is in accordance with the Chinese paper standard (CNS) A4 (210 X 297 mm) than the basic paper size. -13- 528853 A7 B7

V. Description of the invention (W high-potential measuring circuit with high quasi-potential; and potential measuring means for measuring the potential of the aforementioned electrode with respect to the reference potential; and measuring from the aforementioned basic potential change to The moving distance of the potential from the time point of the high potential to the time point when the high potential changes to a low potential lower than the reference potential, or from the time point when the low potential changes to the high potential to the high potential This first electrode slag layer thickness measuring device is constituted by an electrode moving distance measuring means that changes the moving distance of the electrode at the time point of the reference potential. In the case of the upper atmosphere, the potential measurement means detects: the time point at which the electrode potential changes from the reference potential to a higher potential than the reference potential is used as the electrode-to-container characteristic between the container and the electrode that contains the molten metal. Time to the molten metal-slag interface passing power generation; and detect: electrode The potential is the point in time when the potential changes from a high potential to a lower potential than the reference potential as the transit time point when the slag-atmosphere interface moves from power generation to insulation. Then, the measurement method of the electrode moving distance is to obtain the The moving distance of the electrode between the slag interface passage time point and the slag-atmosphere interface passage time point is used as the thickness of the slag layer. In addition, when the electrode is moved from the atmospheric layer through the slag layer to the molten metal layer, a potential measurement method System detection: The potential of the electrode is the time from the low electrical displacement lower than the reference potential to the high potential higher than the reference potential. As the electrode between the container containing the molten metal and the electrode, The dielectric properties of the atmosphere at the time of immersion are used as the standard of the paper. The Chinese National Standard (CNS) A4 specification (210X297 mm) is applied (please read the precautions on the back before filling this page). 11 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the employee consumer cooperative -14- 528853 A7 B7 V. Description of the invention (After the slag layer that moves in nature is moved to the power generation atmosphere-slag interface And it is detected that the potential of the electrode changes from a high potential to a reference potential as the aforementioned electrode-container characteristic is a conductive slag-melt formed by the aforementioned power generation property and the electrode sinking into the molten metal layer The metal interface passes the time point. Then the electrode moving distance measurement method is to find the electrode's moving distance from the time point of the air-slag interface passage time to the time of the slag-molten metal interface passage time, and use this as the thickness of the slag layer. That is, this device is a device for determining the thickness of a slag layer based on the third slag layer thickness measurement method or the fourth slag layer thickness measurement method described above, and its function and effect are the same as those of the third slag layer described above. The method for measuring the thickness of the slag layer or the method for measuring the thickness of the fourth slag layer is the same, so the description is omitted. In the above-mentioned first slag layer thickness measuring device, the electrode moving distance measuring means for directly measuring is used to determine the moving speed of the electrode. However, there is also considered a second slag layer thickness measuring device that can be calculated from the moving speed and moving time of the electrode by calculation. This second slag layer thickness measuring device is an electrode; a container having conductivity and containing molten metal floating on the surface of the molten metal layer on the surface of the molten metal layer; and the electrode is moved up from the molten metal layer to the molten metal layer to An electrode moving means occupying the upper layer of the slag layer, or an electrode moving means for moving from the atmosphere to the molten metal layer through the slag layer; and inserting a DC power source V with the electrode side as the cathode side between the electrode and the container cc impedance RX in series with this power supply, and the 直流 of the DC power supply and the impedance RX, when the electrode sinks into the slag layer, the potential of the electrode which sets the potential of the container as a reference potential is set to be higher than the potential of the electrode Circuit for measuring local potential with high reference potential; Applies Chinese National Standard (CNS) A4 specification (210X297 mm) to the paper size. (Please read the precautions on the back before filling this page) Order for the consumption of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the cooperative -15- 528853 A7 __ B7 V. Description of the invention (1: ^ Determine the electric power of the aforementioned electrode for the aforementioned reference potential Potential measuring means; and the potential measured from the time point when the basic potential changes to the high potential detected to the time point when the high potential changes to the low potential lower than the reference potential detected by the potential measuring means An electrode moving time measuring means for the moving distance of the electrode from the time point when the low potential is changed to the high potential to the time point when the high potential is changed to the reference potential; The moving speed and the moving time are used to calculate the moving distance of the electrode. This second slag layer thickness measuring device is used to calculate the electrode's moving speed and moving time from the electrode. The moving distance has the same effect as the fifth method for measuring the thickness of the slag layer. It is identical to the first device for measuring the thickness of the slag layer except that it is calculated from the moving speed and time of the electrode by calculation. The structure, its function, and the result are completely the same as those of the first slag layer thickness measuring device described above. It is also considered that the third slag layer thickness measurement device described above is a third slag layer thickness measurement device that uses two electrodes to measure the moving speed of the electrode. The third slag layer thickness measurement device is the first 2 Slag layer thickness measuring device, provided with a moving speed detecting means: This moving speed detecting means is provided by adding an electrode to the aforementioned electrode and separating the lower ends of the two electrodes by a certain distance in the moving direction. And the two electrodes are moved at the same time to measure the time shift of the detection potentials of the two aforementioned electrodes of the container, and to obtain the aforementioned moving speed based on the time deviation and the aforementioned certain distance. The standard is applicable. National Standard (CNS) A4 (210X297 mm) LIL ------ f (Please read the precautions on the back before filling this page) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives- 16- 528853 A7 _B7_ V. Description of the invention (j Fig. 6 (a) is an explanatory diagram of the speed detection principle used for the moving speed detection means of the third slag layer thickness measuring device. In Fig. 6 (a), the lower end of the electrode 2 2 is set to be lower than the lower end of the electrode 21 1 and only separated by a distance D in the moving direction, that is, the upper direction. The electrode 2 1 and the electrode 2 2 are connected to the measuring device 2 respectively. 3 first input and second input. The method for measuring the potential of the electrodes 2 1 and 2 of the measuring device 23 with respect to the container 1 is the same as that of the electrode potential measurement method described above. Therefore, when the electrodes 2 1 and 2 2 are moved from the molten metal layer through the slag layer to the atmosphere at the same time, the potential system of the electrodes 2 1 and 2 2 is shown in FIG. 6 (b). 2 inputs, offset by T only. Then, the ascending moving speed S of the electrodes 2 1 and 22 is obtained by S = D / T. With this slag layer thickness measuring device, it is not necessary to set the electrode moving speed in advance. The above-mentioned first slag layer thickness measuring device to the third slag layer thickness measuring device are targeted for molten metal, but molten steel may be used as the molten metal. In a slag layer thickness measuring device using molten steel as a molten metal, an iron alloy containing at least one of Mo, Co, Ci, and Mn is recommended as a material of the electrode used here. In the slag layer thickness measuring device described above, the molten metal in the container is at a high temperature, and the electrode system immersed in the molten metal melts with time. Therefore, it is preferable to extend the time until melting as much as possible. At this point, the above-mentioned alloy system is not easily melted and is excellent as a material for an electrode. The slag layer thickness measuring device described above can also be made to measure the size of the fused slag paper. Applicable to China National Standard (CNS) A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page) Printed by the Consumer Affairs Cooperative of the Property Bureau -17- 528853 A7 A7 B7 V. Description of the Invention (y When the thickness of the slag layer is required to measure the oxygen concentration, the electrode and the molten steel electrode of the oxygen probe are used together. Since the thickness of the slag layer can be measured simultaneously with the measurement of the oxygen concentration, and the electrode is used in combination, the cost of the measuring device can be reduced. In addition, the above-mentioned devices for measuring the thickness of each slag layer can also be made for oxygen detection. The lower tip of the electrode used in combination with the fused steel electrode of the needle and the chrome oxide electrode of the oxygen probe are in the same position, and a protective tube such as a quartz tube is used to cover the parts other than the front ends of the two electrodes. The oxidation cone can prevent the slag from adhering, and can simultaneously measure the thickness of the slag layer and the oxygen concentration, and can use electrodes together, so it can be used as a measuring device. In addition, the above-mentioned apparatus for measuring the thickness of each slag layer can also be used by mounting an electrode on a molten steel temperature measuring probe. Thereby, the measurement of the thickness of the slag layer and the temperature of the molten steel can be performed simultaneously. Since electrodes can be used in combination, the cost of the measuring device can be reduced. However, in a container that contains molten metal such as a converter, a vacuum tank having an immersion tube at the lower portion is arranged above the slag floating on the molten metal. In addition, the immersion tube is immersed in the molten metal, the molten metal is charged in a vacuum tank, and CA and the like are added to aggregate the slag component particles in the molten metal to make it easy to remove the slag component in the molten metal. In this case Because of the need for a water-cooled immersion tube, there is a risk of explosion when this cooling water contacts the molten metal, so the height position from the surface of the molten metal layer in the vacuum tank needs to be controlled, so the horizontal position of the surface of the molten metal layer needs to be determined The above description is about the method of measuring the thickness of the slag layer or its device, but the Chinese standard (CNS) 4 Specifications (210x 297 mm) (Please read the back of the precautions to fill out this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -18-528853 A7 B7 V. Description of the invention (^ The principle used for this is not only the measurement of the thickness of the slag layer, but also the surface level of the molten metal layer Position measurement, so the following is about measuring the thickness of the slag layer. The horizontal position with the surface of the molten metal layer, that is, above the opening of the container containing the molten metal, is located at a fixed point separated from the container by a predetermined distance. Method for measuring the distance to the surface of the molten metal layer .. The first method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer in this method is to measure the molten metal floating on the surface of the molten metal layer in the slag containing layer. Above the opening of the conductive container, the distance from a fixed point separated from the container by a predetermined distance to the surface of the molten metal layer; and the method of the thickness of the slag layer, characterized in that the electrode is formed by the foregoing The molten metal layer moves up through the slag layer to the fixed point in the atmospheric layer occupying the upper layer of the slag layer, The electrode characteristics between the container having conductivity and the electrode after containing the molten metal are electrode-container characteristics, and it is detected that the electrode-container characteristics are caused by the electrode sinking into the molten metal layer according to the electrode. The time when the electrical conductivity of the molten metal layer is transferred to the electrode when the electrode moves to the slag layer and operates as an electrolyte is the time at which the power generation property of the slag layer intersects, which is the passage time of the molten metal-slag interface. Point; after the electrode is separated from the slag layer to the atmosphere, the time between the electrode-container characteristics is changed from the power generation property to the insulation time according to the intervening of the atmosphere layer, that is, the slag-atmosphere interface passage time point; And measure the moving distance of the electrode from the passing time point of the molten metal-slag interface to the passing time point of the slag-atmosphere interface as the aforementioned slag layer thickness; this paper scale applies Chinese National Standard (CNS) A4 Specifications_ (210X297mm) " -19- (Please read the precautions on the back before filling this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, 1T, 528853 A7 B7 V. Description of the invention (d and passing the time point at the molten metal-slag interface to the aforementioned fixed point, and measuring the moving distance of the aforementioned electrode, as measured from the aforementioned fixed point to The distance of the surface of the molten metal layer. Fig. 7 is an explanatory diagram showing the measuring principle of the above method. The above method is shown in Fig. 7 and contains molten metal floating on the surface of the molten metal layer and contained in the slag layer. Above the opening of the conductive container, a predetermined distance from the container is set as a fixed point 9 to move the electrode from the molten metal layer through the slag layer to the atmospheric layer occupying the upper layer of the slag layer. At the fixed point 9, the electrical characteristics between the electrode 5 and the container 1 between the electrode 5 and the container 1 are used to determine the thickness of the slag layer 6 and the distance 10 from the fixed point 9 to the surface of the molten metal layer 10. Method. In the method described above, the method for measuring the thickness of the slag layer 6 is exactly the same as the method for measuring the thickness of the first slag layer. The method for detecting the molten metal-slag interface passing point 7 from the point 9 to the surface of the molten metal layer 2 is also the same as the method for measuring the thickness of the first slag layer. The distance between the slag interface and the electrode 5 can be calculated from the time point 7 to the fixed point 9 by the distance 10 from the fixed point 9 to the surface of the molten metal layer 2. In the above method, the electrode 5 is moved upward, but the electrode 5 can also be lowered. As described above, in Figure 7, the measurement of the horizontal position of the molten metal layer surface is the measurement of the distance between the fixed point 9 and the surface of the molten metal layer 10. Here, the distance from the fixed point to the surface of the molten metal layer is determined. It can be used to determine the distance traveled by the electrode 5 at the molten metal-slag interface passing time point to the fixed point, or the fixed point to the melting point of the slag-molten metal interface passing time. The national standard (CNS) Α4 specification is applicable in this paper standard. (210X297 mm) (Please read the notes on the back before filling this page)

Printed on line 1T, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -20-528853 A7 B7 V. Description of the invention (y or time to proceed, the molten metal-slag interface pass time point or the molten slag-melt metal interface pass time point The detection method used in the above methods for measuring the thickness of each slag layer can still be used. Therefore, as a method for measuring the thickness of the second, third, fourth, or fifth slag layer and the horizontal position of the surface of the molten metal layer, Or the first or second slag layer thickness and molten metal layer surface horizontal position measuring device applies the above-mentioned method for measuring the thickness of each slag layer or the above-mentioned device for measuring the thickness of each slag layer to consider the methods and devices shown below 〇The second method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer is to measure the conductive container above the opening of the container containing the molten metal floating on the surface of the molten metal layer. A method for separating a predetermined distance from a predetermined point to a surface of the molten metal layer; and a method for thickness of the slag layer, characterized in that the electrode is occupied by The fixed point in the upper atmosphere of the slag layer moves down to the molten metal layer through the slag layer, and monitors the electrode characteristics between the conductive container and the electrode after the molten metal is contained, that is, the electrode- Inter-container characteristics, detection: This electrode-container characteristic is based on the insulation of the atmosphere when the electrode is in the atmospheric layer, and moved to the slag layer which acts as an electrolyte after sinking into the slag layer according to the electrode. The time point between the power generation properties is the air-slag interface passage time; the electrode moves from the slag layer to the molten metal layer, and the electrode-container characteristics are changed from the power generation property to the melting point. The time point for the electrical conductivity of the metal layer is also the passing time of the slag-molten metal interface; the measurement is from the aforementioned fixed point to the slag-molten metal interface through this paper. The Chinese National Standard (CNS) A4 specification (210X 297) (Mm) (Please read the notes on the back before filling out this page) Order the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed -21-528853 A7 B7 5. Description of the invention (^ Time point, the moving distance of the aforementioned electrode is taken as the distance from the aforementioned fixed point to the surface of the aforementioned molten metal layer; and the passage time point at the atmosphere-slag interface is measured At the time point when the slag-molten metal interface passes, the distance moved by the electrode is the thickness of the slag layer. The method for measuring the thickness of the third slag layer and the horizontal position of the surface of the molten metal layer lies in the first slag layer In the method for measuring the thickness and the horizontal position of the surface of the molten metal layer, an impedance RX in which a DC power source VCC with the electrode side as the cathode side is connected in series with the power source is inserted between the electrode and the container, and the DC power source and the impedance RX are Alas, when the electrode sinks into the slag layer, the potential of the electrode using the potential of the container as a reference potential is set to a higher potential than the reference potential, and the electrode is moved up from the molten metal layer to The atmospheric layer measures the potential of the electrode with respect to the reference potential, and detects ... The potential is the time point when the reference potential changes to the high potential as the passage time point of the molten metal-solubility interface; the time point when the potential of the electrode changes from the high potential to a low potential lower than the reference potential is taken as The aforementioned slag-atmospheric interface passes through time. The fourth method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer is based on the method for measuring the thickness of the second slag layer and the horizontal position of the surface of the molten metal layer, and the electrode side is inserted as the cathode between the electrode and the container. The DC power supply VCC on the side is an impedance RX connected in series with this power supply, and the 电极 between the DC power supply and the impedance RX is set to the electrode of the electrode using the potential of the container as a reference potential when the electrode sinks into the slag layer. The potential is higher than the aforementioned reference potential, and the aforementioned paper size is suitable for the Financial Standards (CNS) A4 specification (21GX297). -22- (Please read the precautions on the back before filling this page) Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 528853 A7 ______B7_ V. Description of the invention (2 () After the electrode descends from the aforementioned atmospheric layer and moves to the aforementioned molten metal layer, measure the potential of the aforementioned electrode with respect to the aforementioned reference potential and detect: The potential of the electrode changes from the low potential lower than the reference potential to the high potential as the atmospheric-melting The slag interface passing time point; the time when the potential with the electrode changes from the high potential to the reference potential is the time point when the slag-molten metal interface passes. The fifth slag layer thickness and the horizontal position of the molten metal layer surface The measuring method is a method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer of the first, second, third, or fourth molten steel. The moving speed of the ascending or descending movement of the electrode is constant, and the electrode is made of the molten metal. In the case of the method of layer ascending and moving to the aforementioned atmospheric layer, the movement time of the electrode from the molten metal-slag interface passage time point to the aforementioned slag-air interface passage time point is measured as the calculation of the thickness of the slag layer. The moving time of the electrode from the passing time point of the molten metal-slag interface to the fixed point is used to calculate the distance from the fixed point to the surface of the molten metal layer, and the electrode is moved downward from the atmospheric layer to the molten metal layer. In the case of the method, measure from the aforementioned fixed point to the aforementioned slag-melt The moving time of the electrode at the metal interface passing time point is used as the distance calculation from the fixed point to the surface of the molten metal layer, and the electrode is measured from the passing time point of the atmosphere-slag interface to the passing time point of the slag-molten metal interface. The moving time is used as the calculation of the thickness of the slag layer, and the calculation of the moving distance of the electrode from the moving speed and the moving time is used to calculate the moving distance of the electrode instead of measuring the moving distance of the electrode. Standard (CNS) A4 specification (210 X 297 mm) (Please read the notes on the back before filling this page) Order printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economics -23- 528853 A7 __ B7 V. Description of the invention (21 ) The first device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer is an electrode; a container having conductivity with the molten metal that floats on the surface of the molten metal layer; and the electrode is made of the molten metal The layer moves up through the slag into the atmosphere of the container that occupies the upper layer of the slag layer. The electrode moving means located above the opening is located at a fixed point separated from the container by a predetermined distance, or is moved from the fixed point in the atmospheric layer to the molten metal layer through the slag layer; and between the electrode and the container, Insert the impedance RX in series with the DC power supply V cc with the electrode side as the cathode side, and connect the DC power source with the impedance RX, and when the electrode sinks into the slag layer, set to form the container. The potential of the electrode whose potential is the reference potential is a high potential measuring circuit higher than the reference potential; and a potential measuring means for measuring the potential of the electrode with respect to the reference potential; and for measuring the thickness of the slag layer, measure the foregoing The moving distance of the potential detected by the potential measuring means from the time point when the basic potential is changed to the high potential to the time point when the high potential is changed to a lower potential lower than the reference potential, or from The time from the low potential change to the high potential before the high potential change to the The electrode moving distance measuring means for measuring the thickness of the slag layer of the moving distance of the electrode at the time point of the reference potential; and the method for measuring the distance from the fixed point to the surface of the molten metal layer, which is detected by the potential measuring means Electrode for measuring the horizontal position of the molten metal layer surface from the time point at which the reference potential changes to the high potential to the fixed point, or the time at which the electrode moves from the fixed point to the time at which the high potential changes to the basic potential The paper size for moving distance measurement applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling out this page) Order printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economics-24- 528853 A7 B7 V. Description of the invention Then, the second slag layer thickness and molten metal layer surface horizontal position measuring device is an electrode; a container with conductivity for containing molten metal floating on the surface of the molten metal layer on the surface of the molten metal layer; and a constant moving speed, The electrode is moved from the molten metal layer to the atmospheric layer occupying the upper layer of the slag layer by the ascending slag layer, and located at a fixed point separated from the container by a predetermined distance above the opening of the container, or from the atmospheric layer. And the electrode moving means for moving the fixed point to the molten metal layer by dropping the slag layer; and inserting a resistance RX in series with the DC power source V cc having the electrode side as the cathode side between the electrode and the container, and The 値 of the DC power source V cc and the impedance RX is set to measure the potential of the container as a reference potential when the electrode sinks into the slag layer, and the potential of the electrode is a potential higher than the reference potential. A circuit; a potential measuring means for measuring a potential of the electrode with respect to the reference potential; For the measurement of the thickness of the slag layer, the time point from the time when the basic potential is changed to the high potential detected by the potential measuring means is measured from the time when the high potential is changed to a lower potential lower than the reference potential. The moving time of the potential described above, or the moving time of the electrode for measuring the thickness of the slag layer from the time when the low potential changes to the high potential to the time when the high potential changes to the reference potential Measuring means; for measuring the distance from the fixed point to the surface of the molten metal layer, measuring the time from the reference potential to the high potential detected by the potential measuring means to the fixed point, or From the fixed point to the high potential change from the previous count to the previous paper size, the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) is applied (please read the precautions on the back before filling this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the 1T line -25- 528853 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs An electrode moving time measuring means for measuring the horizontal position of the layer surface; and an electrode moving distance calculating means for calculating a moving distance of the electrode by calculating from the moving speed and the moving time of the electrode. The method for measuring the layer thickness and the horizontal position of the molten metal layer surface or the device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer uses the method for measuring the thickness of the slag layer or is used in the device for measuring the thickness of the slag layer. The principle can measure not only the thickness of the slag layer, but also the horizontal position of the thickness of the slag layer. [Embodiments of the invention] Next, an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is directed to molten metal However, in the first embodiment of the present invention, the thickness of the slag layer is measured. The molten steel is used as the molten metal. Fig. 8 is an explanatory diagram showing the structure of the slag layer thickness measuring device of the first embodiment. In Fig. 8, the 31 series converter, the 3 series 2 molten steel layer, and the 3 series Slag layer, 3 4 series atmosphere, 3 5 series electrode, 3 6 series probe, 37 series spear, 38 series spear moving device, 39 series encoder, 40 series measurement device, 41 series DC Power supply V cc, 4 2 series resistor RX, 4 3 series electrode potential measurement circuit (analog circuit), 4 4 series spear movement control circuit, 4 5 series encoder pulse counter circuit, 4 6 series microcomputer, and then 4 8 series Display. In the first embodiment, a converter is used as a container for smelting steel, and a casting bucket can also be used. (Please read the precautions on the back before filling this page) f

1. The paper size of the 1T line is in accordance with the Chinese National Standard (CNS) 8-4 specification (2ΐ〇χ297mm) -26- 528853 A7 ___ B7 5. Description of the invention (In Fig. 8, the electrodes 3 and 5 are made and held by the probe 3, and a structure in which the spear piece 37 holding the probe 3 6 is moved up and down in a vertical direction by the spear piece moving device 38 is used to move the electrode 35. The spear piece moving device 38 is a pulse motor and Positioning control motors, such as auxiliary motors, and devices that convert linear motion of racks and gears into linear motion. It is also possible to use a screw drive mechanism as shown in Figure 12 instead of this structure The spear piece moving device 38. In Fig. 12, the structure using a paper probe as a substitute for the spear piece is made, and the probe is rotated to make it move up and down. Fig. 8 is a view showing the structure of the joints of the electrodes 3 5, probe 36, and spear member 37. In Fig. 9, the electrode 3 5 is connected to the contact joint 51 of the probe 36, and The contact contact 5 1 is in contact with the ring contact 5 2 and is connected to the electrode potential measuring circuit (analog circuit) 4 3. The probe 4 6 series can only withstand the short time required for the measurement, and it needs to be replaced every time it is measured. In this figure, the converter 3 1 series is used. Generally, it is formed by stacking refractory bricks on the inside of a metal container. Although it is not conductive only if the converter 31 is used, the molten steel is received in the converter 31 and the metal adheres to the inner surface of the converter 31 to form the converter 3 1 There is conductivity between the inner surface of the ground and the ground. That is, it is equivalent to the converter 31 being grounded to the ground. Also, between the ground and the electrode 35, it is connected: the DC power source V with the electrode 35 side as the cathode cc 1 1. This paper is directly connected to this DC power supply. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page). System -27- 528853 A7 ___________ B7 V. Description of the invention (resistance RX 1 2 for g. Here, the system of the DC power supply 1 1 and the resistance RX 1 2 is set so that when the electrode 3 5 sinks into the slag layer 3 At 3 o'clock, the The potential of the electrode 5 of the furnace 31 becomes a positive potential. Specifically, as described above, the resistance RX 1 2 is set to a very large value compared to the internal resistance of the chemical battery characteristics shown in the slag layer 33. For example, the internal resistance of the chemical battery characteristics shown in the slag layer 33 is in the range of several tens to several hundreds of ohms, and the resistance RX 1 2 is set in the range of several hundreds of thousands of ohms. As a result, the electrode The potential system between 3 5 and ground is approximately the same as the power of the chemical battery characteristics shown in the slag layer 3 3. Since the electric power is anodic to the ground, the potential of the electrode 35 becomes a positive potential. The electrode potential measuring circuit (analog circuit) 4 3 measures the potential of the electrode 35 using the ground potential, that is, the potential of the converter 31 as a reference potential. The encoder 39 is linked with the spear moving device 38, and generates a pulse for measuring the moving distance when the spear 37 is moved up and down. The pulse is counted by the code pulse meter circuit 45 to obtain the spear. Its moving distance. It is also considered that the moving direction on the side of the spear piece is provided with an equal interval stripe pattern scale formed by unevenness or black and white and uses a light source and a light sensor instead of using this encoder 39. As the spear piece moves, the detection This method is used to determine / count the change of uneven pattern or black and white stripe pattern, and measure the moving distance of the spear. In the measuring device of FIG. 8 described above, the electrode 35 is moved downward from the atmospheric layer 34 through the slag layer 3 3 to the molten steel layer 3 2, or vice versa, the molten steel layer 32 is passed through the slag layer 3 3 Ascend to the atmosphere 3 4 and use the electricity between the electrode 3 5 and the container, that is, the converter 3 1 The paper size applies the Chinese National Standard (CNS) Α4 specification (210X 297 mm) (Please read the back first (Notes for filling in this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -28- 528853 A7 ______ ______B7__ V. Description of the invention (-The gas characteristics is the change of the characteristics between the electrode and the container to determine the thickness of the slag layer 33, but in this In the first embodiment, the thickness of the slag layer 33 is measured after it is moved from the molten steel layer 32 through the dissolved layer 33 to the atmospheric layer 34. In this case, the converter 31 of the same potential as the ground line The potential change of the electrode 35, which has the potential as a reference potential, is formed as shown in FIG. 5 above. In FIG. 5, measurement is started at the time point a, and when the electrode 35 is located at the molten steel layer 32, (a) the system is V a. And 0 (V). At the time Tb when the electrode 35 is moved from the molten steel layer 32 to the slag layer 33, that is, the time point at which the molten steel-slag interface passes, it is Vb and the potential is positive. The T c time point at which 3 5 moves from the slag layer 3 3 to the atmosphere layer 3 4 is the passing time point at the slag-atmosphere interface. V c is a V cc (V) and has a negative potential. The counter circuit 4 5 counts the distance that the electrode 3 5 has moved, that is, the distance that the spear member 37 has moved, and measures the electricity with the electrode potential. (Analog circuit) The time point when the potential of the 4 3 detection electrode 3 5 changes from 0 (V) to a positive potential; and the time point when the potential changes from a positive potential to a negative potential. The output signal of the electrode potential measurement circuit (analog circuit) 4 3 is input to the microcomputer 4 7 to determine the thickness of the slag layer, which is displayed on the display 4 8. In the above-mentioned measuring device, the output from the encoder 3 9 is used. The pulse directly calculates the moving distance of the electrode 35, but there is also a method to obtain the moving speed and time of the electrode by calculation. In this method, from Figure 8, the encoder 39 and the encoder pulse counter are removed. Circuit 45, and the paper size of this paper applies the Chinese National Standard (CNS) A4 specification (21〇'〆297 mm) " — '-29- (Please read the precautions on the back before filling this page) Order the Ministry of Economic Affairs Printed by the Intellectual Property Bureau employee consumer cooperative 528853 A7 _ B7_ V. Description of the invention (2?) (Please read the precautions on the back before filling out this page) First make the moving speed of the electrode 3 5 a certain speed, and measure the electrode potential (Analog circuit) 4 3 Detects the passing point of time between the molten steel-slag interface and the passing point of the slag-atmosphere interface. This signal is input to the microcomputer 4 7. Then, the microcomputer 4 7 obtains the movement of the electrode 3 5 Calculate the thickness of the slag layer by calculating the moving speed of the electrode 35 with the time from the moving time and the moving speed of the electrode 35. In this method, the moving speed of the electrode is set in advance, and this moving speed is used to calculate the melting speed. The thickness of the slag layer may be made without setting the electrode moving speed in advance. As described above, the two electrodes shown in FIG. 6 are used to measure the electrode moving speed. In the case of the method of determining the moving distance from the moving time and moving speed of the electrode 35, the change in the potential of the electrode 35 which uses the potential of the converter 31 with the same potential as the ground line as the reference potential is also formed as described above. 5 Figure. The slag layer thickness measuring device using this method can display the change in the potential and display the calculation result of the thickness of the slag layer. Fig. 10 is a diagram showing a display example of the slag layer thickness measuring device in this case. Fig. 11 (a), (b), (c Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs) (d) are diagrams showing examples of potential changes of the electrode 35 in this case. In the measurement device described above, the electrode 35 was moved from the atmospheric layer 34 through the slag layer 33 to the molten steel layer 32, but the electrode 35 was moved from the molten steel layer 32 through the slag layer 33 to the atmosphere. Similarly, the thickness of the slag layer 33 can also be found in 3 4. In the above measuring device, the electrode 35 is moved up and down in the vertical direction. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X29 * 7 mm) -30- 528853 A7 B7 5. Description of the invention (2 $ movement, However, it is also possible to make a pair of slag layers to move in an oblique direction. In this case, the thickness of the slag layer can be calculated by calculation from the angle of inclination and the moving distance of the electrode. If it is based on the above measuring device, it can also be shown in Figure 11 It is learned that the change in the potential of the electrode 35 is due to one of the reference potential, which is 0 (V), a high potential higher than the reference potential, which is a positive potential, and a low potential lower than the reference potential, which is a negative potential. These changes can accurately detect these changes, and based on these detection results, the moving distance of the electrode 35 can be accurately obtained, so that the thickness of the slag layer 33 can be accurately known. Since the resistance between the electrode 35 and the container 31 changes due to the contact resistance of a connector or the like connected to the electrode 35, the change in the potential of the electrode 35 is also a low potential lower than the reference potential. middle One kind of change will not change, so the measurement method based on the measurement device described above is a measurement method that is not easily affected by the change in resistance between the electrode 35 and the container 31. In the first embodiment described above, As mentioned above, molten steel is the object, but the content described above can also be applied to the case where molten metal is generally used. It is recommended to include a slag layer thickness measuring device using molten steel as the molten metal. An iron alloy of at least one of Mo, Co, Cr, and Mn is used as the material of the electrode. In the above-mentioned slag layer thickness measuring device, the molten metal in the container is at a high temperature, and the electrode system immersed in the molten metal is changed with time. Therefore, it is better to extend the time until melting as much as possible. At this point, the above alloys are not easy to melt, and the material of the electrode is very suitable for this paper. Chinese paper standard (CNS) A4 specification (210 ×: 297 mm) ) (Please read the notes on the back before filling this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, 1T-31-528853 Μ B7 _ V. Description of the invention (^ Excellent. In the above-mentioned slag layer thickness measuring device, it can also be used to measure the thickness of the slag layer, such as As shown in FIG. 13, an electrode used for measuring the oxygen concentration is used in combination with a molten steel electrode 7 2 having an oxygen probe 7 3 with a chromium oxide electrode 7 1. Thus, the thickness of the slag layer can be measured simultaneously. The measurement and the oxygen concentration measurement are combined with an electrode, so that the cost of the measurement device can be reduced. In FIG. 13, the 74 series oxygen concentration measuring device and the 75 series slag layer thickness measuring device are shown in FIG. 13. The device for measuring the thickness of the slag layer can also be made as shown in FIG. 14 so that the position of the lower tip of the electrode used in combination with the molten steel electrode 7 2 of the oxygen probe 7 3 and the zirconia electrode 7 1 of the oxygen probe is the same. In addition, a protective tube 76 such as a quartz tube is used to cover portions other than the front end portions of both sides. By this, both the counter electrode and the oxidation pin of the oxygen probe can prevent the slag from adhering and the thickness of the slag layer can be simultaneously performed. Determination of oxygen and oxygen concentration, and Since the electrode is used, the cost of the measuring device can be reduced. As shown in FIG. 14, the 74-series oxygen concentration measuring device and the 75-series slag layer thickness measuring device are as described above. The electrode can be used as a probe for measuring the temperature of molten steel. By doing this, the thickness of the slag layer and the temperature of the molten steel can be measured at the same time, and the electrode can be used together, so the cost of the measuring device can be reduced. In a container containing molten metal such as a converter, a vacuum tank provided with a dipping tube in the lower part is arranged above the slag floating on the molten metal, and the dipping tube is immersed in the molten metal to melt the molten metal. Paper size is applicable. National Standard (CNS) A4 specification (2) 0X297 mm (Please read the precautions on the back before filling this page) Order printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economy -32-528853 A7 B7 V. Description of the invention (3 () (Please read the precautions on the back before filling in this page) Put it in a vacuum tank, add Ca and other materials to aggregate the slag component particles in the molten metal, and make It is easy to remove the slag component in the molten metal. In this case, a water-cooled immersion tube is required, and when this cooling water comes into contact with the molten metal, there is a risk of explosion, so it is necessary to control the surface of the molten metal layer in the vacuum tank. Height position, it is necessary to measure the horizontal position of the surface of the molten metal layer. Therefore, the measurement of the thickness of the slag layer and the horizontal position of the surface of the molten metal layer will be described, that is, above the opening of the container containing the molten metal. The second embodiment of the present invention is a device for measuring the thickness of a slag layer and the horizontal position of the surface of a molten steel layer. The change in the distance from the fixed point to the surface of the molten steel layer is reflected in the positional relationship between the fixed point and the vacuum tank, which can control the position of the vacuum tank. Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 15 is an explanatory diagram showing the structure of the device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten steel layer of the present invention. In FIG. 15, the same drawing numbers as those in FIG. 8 are the same as those in FIG. 8. The difference from FIG. 8 is that a vacuum tank 24 equipped with a dip tube 25 in the lower part is arranged above the converter 31, and a side of the spear 37 is provided to detect the state where the electrode 35 is located at the fixed point 4 9 The fixed-point detection mark 2 8 is set, and the light source 2 7 and the perceptron 2 9 are set to detect the fixed-point detection mark 2 8. The fixed-point detection circuit 4 6 is set, and the output of the perceptron 2 9 is set. Input to this fixed-point detection circuit 46, and input the output of this fixed-point detection circuit 46 to points of the microcomputer 47. In the second embodiment, as in the first embodiment, the molten steel layer 32 is moved up to the atmospheric layer 34 through the molten slag layer 3 3 to measure the thickness of the slag layer and the fixed points on the surface of the molten steel layer. distance. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -33- 528853 A7 B7 V. Description of the invention (31) In this case, the method for measuring the thickness of the slag layer is exactly the same as in the first embodiment. In addition, the distance from the fixed point to the surface of the molten steel layer is at the time point when the electrode 3 5 moves from the molten steel layer 32 to the slag layer 33, that is, from the molten steel-slag interface time point to the fixed point, and the electrode 3 is measured. 5 is the moving distance of the spear piece 37. The time point of the molten steel-slag interface is the time point at which the potential of the electrode 35 changes from the reference potential to the aforementioned high potential, and the time point to the fixed point is because the sensor 2 9 detects the fixed-point detection mark 2 8 At the time point, these detection signals are inputted to the microcomputer 47 by the fixed-point detection circuit 46, which is the same as the first embodiment. The microcomputer 47 is used to calculate the thickness of the slag layer and from the fixed point to the molten steel. The distance of the layer surface is shown by the display 48. The device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten steel layer in the second embodiment described above can also be made the same as in the first embodiment, and the electrode can be measured by moving it downward. Therefore, it is also possible to measure the moving speed of the electrode using two electrodes as shown in FIG. Alternatively, the electrode may be moved diagonally with respect to the slag layer. In addition, a ladle can also be used as a container for holding molten steel. Moreover, not only molten steel but also general molten metal can be used. According to the apparatus for measuring the thickness of the slag layer and the horizontal position of the surface of the molten steel layer according to the above-mentioned second embodiment, not only the thickness of the slag layer but also the thickness of the slag layer can be measured by using the principle used in the slag layer thickness measuring device described above. Horizontal position of the surface of the slag layer. In any of the first and second embodiments described above, the DC power source 11 uses the electrode 3 5 side as the cathode, but even if the electrode 3 5 is used as the anode, the measurement can be performed in principle. In other words, the Chinese paper (CNS) Α4 specification (210X 297 mm) is applicable to the paper size shown in Figure 8 and Figure 15. L-- · ------ · —— 丨 (Please read the precautions on the back before (Fill in this page)

Printed by 1T Consumer Cooperatives of Intellectual Property Bureau of the Ministry of Economic Affairs-34- Printed by Employee Cooperatives of Intellectual Property Bureau of the Ministry of Economic Affairs 528853 A7 B7 V. Description of the invention (y picture, even if the polarity of V cc is reversed, the use of fusion The electrical characteristics exhibited by the slag layer are that the thickness of the molten steel in the lower layer and the atmosphere in the upper layer are different from the thickness of the slag layer and the horizontal position on the surface of the slag layer. Or the second method for measuring the thickness of the slag layer, the measurement is made by using the electrical characteristics between the electrode and the container, that is, changes in the characteristics between the electrode and the container, that is, changes in the properties of conductivity, power generation, or insulation. This kind of change is not the same as the change of the impedance between each other, but the changes of the different ones, so you can clearly understand the change and accurately measure the thickness of the slag layer. Moreover, the electrode itself is Because it is not costly, it can be exchanged every time it is measured, and it is not necessary to perform damage prevention steps on the electrode. The slag layer thickness measurement method can provide a low-cost slag layer thickness measurement method. According to the third slag layer thickness measurement method or the fourth slag layer thickness measurement method described above, it can provide: The change in electrode potential is Changes to one of the reference potential, a higher potential higher than the reference potential, and a lower potential lower than the reference potential can be detected digitally, so that the change can be accurately detected. Using these detections as Based on this, the moving distance of the electrode can be accurately obtained, and the method for measuring the thickness of the slag layer can be accurately known. In addition, it is possible to provide a receiving paper by using a connector or the like connected to the electrode. The dimensions are applicable to the Chinese National Standard (CNS) A4 specifications (210X297 mm) L ——.------ · ------, 玎 ------ 0Φ— (Please read the precautions on the back first (Fill in this page again) -35- 528853 A7 B7 V. Description of the invention (Electric impedance, even if the impedance between the electrode and the container changes, the potential change of the electrode is also towards the reference potential, a higher potential than this reference potential, Benchmark The change of one of the low potentials is low, so the above-mentioned measurement method is a method for measuring the thickness of a slag layer which is not easily affected by the change in the impedance between the electrode and the container. According to the fifth slag layer thickness The measurement method can provide a measurement method for measuring the thickness of the slag layer without the need to directly measure the moving distance of the electrode. According to the first slag layer thickness measurement device, it can provide: change in electrode potential The change is one of a reference potential, a high potential higher than the reference potential, and a low potential lower than the reference potential. Since the change can be grasped digitally, the change can be accurately detected. Based on this, the moving distance of the electrode can be accurately determined, and the thickness of the slag layer can be accurately determined. In addition, it is possible to provide a contact impedance of a connector or the like connected to the electrode, so that even if the impedance between the electrode and the container changes, the change in the potential of the electrode is toward the reference potential, a high potential higher than the reference potential, The change in one of the low potentials having a low reference potential is a measurement device for measuring the thickness of a slag layer, which can be said to be less affected by a change in impedance between the electrode and the container. According to the second device for measuring the thickness of a slag layer, the effects of the device for measuring the thickness of a slag layer in the sixth aspect of the patent application are added, and the following effects are obtained. That is, if this slag layer thickness measuring device is provided, it can provide: It is not necessary to directly measure the moving distance of the electrode, so the measuring method becomes simple. The paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) ( Please read the notes on the back before filling in this page) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-36- 528853 Α7 Β7 V. Description of the invention (D slag layer thickness measuring device. If according to the third slag layer The thickness measuring device can provide a slag layer thickness measuring device that does not require a preset electrode moving speed. The first slag layer thickness measuring device to the third slag layer thickness measuring device are for molten metal, but they can be used. Molten steel is used as the molten metal. An iron alloy of at least one of M 0, C 0, C r, and M η can be prepared as the material of the electrode of the aforementioned molten layer thickness measuring device using molten steel as the molten metal. When measuring the thickness of a slag layer, a device for measuring the thickness of a slag layer in which an electrode does not easily melt. The aforementioned slag using molten steel as the molten metal is used. The electrode of the thickness measuring device is used in combination with the molten steel electrode of the oxygen probe, and since the thickness of the slag layer and the oxygen concentration can be measured at the same time, and the electrode is used in combination, the cost of the measuring device can be reduced. The lower ends of the electrodes of the slag layer thickness measuring device used in combination with the molten steel electrode of the probe and the oxidation pin of the oxygen probe are in the same position, and a protective tube such as a quartz tube is used to cover parts other than the front ends of both sides. The zirconium oxide of the counter electrode and the oxygen probe can prevent slag adhesion, and simultaneously measure the thickness of the slag layer and the measurement of the oxygen concentration, and the electrode can be used together, so that the cost of the measurement device can be reduced. Molten steel is used as the electrode of each of the aforementioned slag layer thickness measuring devices for molten metal. It is mounted on a 7 molten steel temperature measurement probe. You can ask Risi to measure the thickness of the slag layer and the temperature of the molten steel, and the electrode can be used in combination. The cost of the measuring device can be reduced. 逖 According to the thickness of the slag layer and the surface water of the molten metal layer from the first to the fifth, the paper size is applicable to China. Standard (CNS) Α4 specification (210x297 mm) (Please read the notes on the back before filling out this page)-Ordered by the Intellectual Property Bureau Employee Consumer Cooperatives of the Ministry of Economic Affairs-37- 528853 A7 ____B7_ V. Description of the invention (^ Flat position The measuring method or the first and second slag layer thickness and molten metal layer surface horizontal position measuring devices use the principle used in the slag layer thickness measuring method or the slag layer thickness measuring device to measure not only the slag The thickness of the slag layer can also be used to measure the horizontal position of the surface of the molten metal layer. [Simplified description of the drawing] Figure 1 is an explanatory diagram showing the principle of the first method for measuring the thickness of the slag layer of the present invention. Figure 2 shows the present invention An explanatory diagram of the principle of the third method for measuring the thickness of a slag layer. Fig. 3 is an isothermal circuit diagram of Fig. 2. Figure 4 is the isoelectric circuit diagram of Figure 3, (a) shows the case where the electrode is located in the molten metal layer, (b) shows the case where the electrode is located in the slag layer, and (c) shows the case where the electrode is located in the atmosphere. Fig. 5 is a graph showing changes in the potential of an electrode using the potential of a container as a reference potential when the electrode is moved from the molten metal layer through the slag layer to the atmosphere. Fig. 6 is an explanatory diagram of a method for measuring the moving speed of an electrode using two electrodes. (A) shows its principle, and (b) shows changes in the potential of each electrode. Fig. 7 is an explanatory diagram showing the principle of the method for measuring the thickness of the first slag layer and the horizontal position of the surface of the molten metal layer of the present invention. Fig. 8 is an explanatory diagram showing the structure of a slag layer thickness measuring device according to the first embodiment of the present invention. This paper size applies to China National Standard (CNS) A4 (210 X297 mm) L! ------ (Please read the precautions on the back before filling out this page) Imprint -38-528853 A7 B7 V. Description of the invention (y Figure 9 is an explanatory diagram showing the structure of the joints of the electrodes, probes, and spears of Figure 8. Figure 10 is the first implementation of the use of Figure 10. An example of the display on the display of the slag layer thickness measuring device for the method of determining the moving distance and the moving speed of the electrode in the example. Figure 11 (a), (b), (c), (d) are all used A display example of the change in the potential of the electrode of the slag layer thickness measuring device of the method for determining the moving distance from the electrode moving time and moving speed in the first embodiment. Figure 12 shows a cross section of a probe using a screw advance mechanism. Fig. 13 is a configuration diagram of a slag layer thickness measurement device used in conjunction with an oxygen concentration measurement device (1). Fig. 14 is a constitutional chart of a slag layer thickness measurement device used in conjunction with an oxygen concentration measurement device (2 ). Figure 15 shows a second embodiment of the present invention. Explanation of the structure of the device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer. [Illustration of the drawing number] 1 Vessel 2 Molten metal layer 3 Slag layer 4 Atmospheric layer 5 Electrode 6 Slag thickness This paper scale applies Chinese national standards (CNS) A4 specification (210X297 mm) L --.------ · -I (Please read the precautions on the back before filling out this page), printed by the Consumer Cooperative of the Intellectual Property Bureau of the 11th Ministry of Economic Affairs- 39- 528853 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

V. Description of the invention (7 Time point of passage of molten metal-slag interface 8 Time point of passage of slag-air interface 9 Fixed point 11 DC power supply (v CC) 12 Resistance RX 13 Potential measurement means 19 Switch 2 1 Electrode 2 2 Electrode 2 4 Vacuum tank 2 8 Marking for spot detection 2 9 Sensor 3 1 Converter 3 2 Molten steel layer 3 3 Slag layer 3 4 Atmospheric layer 3 5 Electrode 3 6 Probe 3 7 Spear piece 38 Spear piece moving device 3 9 Encoder 4 0 a Measuring device 41 DC power supply (V cc) 4 2 Resistance RXI, -----------! (Please read the precautions on the back before filling this page)

、 1T This paper size applies Chinese National Standard (CNS) A4 specification (210X 297mm) -40- 528853 A7 B7 V. Description of the invention (^ 4 3 Electrode potential measurement circuit (analog circuit) 4 4 Spear movement control circuit 45 Coded pulse counter circuit 4 6 Fixed-point detection circuit 4 7 Microcomputer 4 8 Display 4 9 Fixed-point 5 1 Contact point 52 Ring contactor 71 Zirconia pole 7 2 Molten steel electrode 7 3 Oxygen probe 74 Oxygen concentration measuring device 75 Slag Layer thickness tester 7 6 Protective tube (please read the precautions on the back before filling this page) f Thread 1 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economy This paper applies the Chinese national standard (CNS) A4 specification (210X 297 mm) -41-

Claims (1)

528853 A8 B8 C8 D8 6. Scope of patent application 1 (Please read the precautions on the back before filling this page) 1 · A method for measuring the thickness of the slag layer, which measures the foregoing of the molten metal floating on the surface of the molten metal layer The method for the thickness of the slag layer is characterized in that the electrode is moved from the molten metal layer through the slag layer to the atmospheric layer that occupies the upper layer of the slag layer, and monitors the container with conductivity after the molten metal is contained. The electrode characteristic between the electrode and the electrode is also the electrode-container characteristic. It is detected that the electrode-container characteristic is the conductivity / migration of the molten metal layer when the electrode sinks into the molten metal layer according to the electrode. The point in time when the electrode moves to the slag layer and operates as an electrolyte is the time point at which the power generation of the slag layer passes; that is, the passing time of the molten metal-slag interface; the electrode is separated from the slag layer to the foregoing electrode. After the atmosphere, the above-mentioned electrode-container characteristics are shifted from the power generation property to the point in time when the insulation properties of the atmosphere are interposed. It is the passing time point of the slag-atmosphere interface; and the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economy printed the passing time point of the molten metal-slag interface to the passing time of the slag-air interface to measure the movement of the electrode The distance is the thickness of the slag layer. 2. A method for measuring the thickness of the slag layer, which is a method for measuring the thickness of the slag layer of the molten metal floating on the surface of the molten metal layer, and is characterized in that the electrode is formed by the electrode occupying the upper layer of the slag layer. The atmospheric layer descends and moves to the molten metal layer through the slag layer, and monitors the electrode characteristics between the conductive container and the electrode after the molten metal is contained, which is the Chinese standard (CNS) A4 specification for this paper standard ( 210X297 mm) _42-^ 528853 A8 B8 C8 D8 Printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 6. Application for patent scope 2 Electrode-container characteristics: Detecting: This electrode-container characteristic is determined by The atmospheric insulation of the atmosphere at the time of the atmosphere is moved to the time point of the electricity generation of the medium of the slag layer which acts as an electrolyte after the electrode sinks into the slag layer according to the aforementioned electrode, which is the time point of passage of the air-slag interface; and The electrode is moved from the slag layer to the molten metal layer, and the electrode-container characteristic is moved from the power generation property to The electrode is measured based on the time point of electrical conductivity of the molten metal layer, that is, the slag-molten metal interface passage time point, from the atmospheric-slag interface passage time point to the slag-molten metal interface passage time point. The moving distance is taken as the thickness of the aforementioned slag layer. 3. The method for measuring the thickness of a slag layer according to item 1 of the scope of patent application, wherein a DC power source V cc with the electrode side as the cathode side is inserted between the electrode and the container, and the impedance RX in series with the power source is inserted, and The 値 between the DC power source and the impedance RX is set to a potential of the electrode that uses the potential of the container as a reference potential when the electrode sinks into the slag layer. The electrode is moved from the molten metal layer to the atmospheric layer, and the potential of the electrode with respect to the reference potential is measured. It is detected that the potential of the electrode changes from the reference potential to the high potential at the time point as the molten metal-slag. The time at which the interface passes; the time at which the potential of the electrode changes from the high potential to a lower potential lower than the reference potential is used as the slag-atmospheric interface passage time. The paper ^ scale applies Chinese National Standard (CNS) A4 specifications ( 210X297 mm) -43- (Please read the precautions on the back before filling this page) A8 B8 C8 D8 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. The scope of patent application 3 points. 4 · The method for measuring the thickness of the slag layer according to item 2 of the scope of the patent application, wherein a DC power source V cc with the electrode side as the cathode side is inserted between the electrode and the container, and the impedance RX in series with the power source is inserted, and The 电极 between the DC power source and the impedance RX is set such that the potential of the electrode using the potential of the container as a reference potential is higher than the reference potential when the electrode sinks into the slag layer, and the electrode After descending from the atmospheric layer to the molten metal layer, the potential of the electrode with respect to the reference potential was measured, and it was detected that the potential of the electrode was changed from a low potential lower than the reference potential to a high potential as the foregoing point The time point at which the air-slag interface passes; the time point at which the potential with the electrode changes from the high potential to the reference potential is the time point at which the slag-molten metal interface passes. 5. The method for measuring the thickness of a slag layer according to any one of claims 1 to 4, wherein the moving speed of the ascending or descending movement of the electrode is set constant, and the electrode is raised from the molten metal layer. The method of moving to the above-mentioned atmosphere is to measure the moving time of the electrode from the passing time point of the molten metal-slag interface to the passing time point of the slag-air interface. The method of the aforementioned molten metal layer method is to measure the movement time of the aforementioned pole from the passage time point of the atmosphere-slag interface to the passage time point of the slag-molten metal interface. (Please read the precautions on the back before filling in this Page) f, 11. ·! This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 cm) -44- 528853 A8 B8 C8 D8 6. Application for patent scope 4 The aforementioned moving speed and the aforementioned moving time of the aforementioned electrode , Instead of measuring the moving distance of the electrode, calculate the moving distance of the electrode by operation. 6 · A device for measuring the thickness of a slag layer, comprising: an electrode; a container having conductivity with the molten metal floating on the surface of the molten metal layer of the slag layer; and passing the electrode through the molten metal layer Electrode moving means that the slag rises and moves to the atmosphere occupying the upper layer of the slag layer, or moves down from the atmosphere to the molten metal layer through the slag layer; and between the electrode and the container, the electrode side is inserted as the cathode The DC power supply V cc on the side is an impedance RX connected in series with this power supply, and when the electrode of the DC power supply and the impedance RX is sunk into the slag layer, it is set to form the electrode using the potential of the container as a reference potential. The potential is a high potential measurement circuit higher than the reference potential; and a potential measurement means for measuring the potential of the electrode with respect to the reference potential; and a potential measurement means for measuring the potential measured by the potential measurement means from the basic From the time point when the potential changes to the high potential Electrode movement distance of the aforementioned potential at a time point of low low potential, or electrode movement distance of the electrode from a time point when the low potential changes to the high potential to a time point when the high potential changes to the reference potential Distance measurement means. '7. —A kind of slag layer thickness measuring device, which features: This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page), 1T, line -Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 528853 A8 B8 C8 D8 々, patent application scope 5 includes: electrodes; containers with conductivity that contain molten metal floating on the surface of the molten metal layer on the surface of the molten metal layer; and will move The speed is fixed to move the electrode from the molten metal layer to the atmosphere occupying the upper layer of the slag layer through the slag, or to move the electrode from the atmospheric layer to the molten metal layer through the slag layer; and Between the electrode and the container, an impedance RX in which the DC power source V cc with the aforementioned electrode side as the cathode side is connected in series with this power source, and the 値 between the aforementioned DC power source and the aforementioned impedance RX, when the electrode sinks into the slag layer, It is set that the potential of the electrode forming the reference potential is higher than the reference potential. Potential measurement circuit; and a potential measurement means for measuring the potential of the electrode with respect to the reference potential of fir; and a point in time at which the basic potential is changed to the high potential as detected by the potential measurement means The moving distance of the potential to the time point when the high potential changes to a low potential lower than the reference potential, or from the time point when the low potential changes to the high potential to the time when the high potential changes to the reference potential Electrode movement time measuring means of the moving distance of the electrode at the time point; and · electrode moving distance calculating means of calculating the moving distance of the electrode from the moving speed and the moving time of the electrode by using calculation. 8 · If the device for measuring the thickness of the slag layer according to item 7 of the scope of the patent application, it is provided with a moving speed detection method: the moving speed detection method is to use the Chinese paper standard (CNS) A4 specification (210X: 297) (Please read the precautions on the back before filling this page), 11 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-46- 528853 A8 B8 C8 D8 6. Application for patent scope 6 Add an electrode to the aforementioned electrode, and The lower ends of the two electrodes are set apart by a certain distance in the moving direction, and the two electrodes are moved simultaneously to measure the time shift of the detection potentials of the two electrodes of the container, and The offset between this time and the aforementioned certain distance is used to obtain the aforementioned moving speed. 9. The slag layer thickness measuring device according to any one of claims 6 to 8, wherein molten steel is used as the aforementioned molten metal. 10. The slag layer thickness measuring device according to item 9 of the scope of the patent application, which comprises at least one of an iron alloy of Mo, Co, Cr, and Mn as the material of the aforementioned electrode. 1 1. The slag layer thickness measuring device according to item 9 of the scope of patent application, wherein the foregoing electrode is used in combination with a molten steel electrode of an oxygen probe for oxygen concentration measurement. 12. The slag layer thickness measuring device according to item 11 of the scope of patent application, wherein the front end of the lower part of the oxidation pin of the above-mentioned electrode and the oxygen probe for measuring the oxygen concentration is aligned, and a protective device such as a quartz tube is used. The tube covers portions other than the front end portions of both sides. 1 3. The apparatus for measuring the thickness of a slag layer according to item 9 of the scope of patent application, wherein the foregoing electrode is mounted on a probe for measuring the temperature of molten steel. 14. A method for measuring the thickness of a slag layer and the horizontal position of the surface of a molten metal layer, which is measured above the opening of a conductive container that contains the molten metal floating on the surface of the molten metal layer and has conductivity. The method of separating the container from a predetermined distance from the fixed point to the surface of the molten metal layer; and the method of the thickness of the slag layer, which is characterized by: The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) L — Γ ----- #-1 (Please read the precautions on the back before filling this page) Order-Line 1 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 8 88 8 ABCD 528853 VI. Application for patent scope 7 The electrode The molten metal layer rises through the slag layer and moves to the fixed point in the atmosphere that occupies the upper layer of the slag layer, and monitors the electrode characteristics between the container and the electrode, that is, the electrode-to-vessel characteristics. Detects: this The electrode-container characteristic is based on the electrical conductivity of the molten metal layer when the electrode sinks into the molten metal layer, and moves to the front. The time at which the electrode moves to the slag layer and operates as an electrolyte is the time point at which the electricity generation of the slag layer passes, which is the time of passage of the molten metal-slag interface; and the electrode is separated from the slag layer to the atmosphere Then, the characteristics between the electrode and the container are shifted from the power generation property to the time point according to the insulation of the atmospheric layer, that is, the slag-atmosphere interface passage time point; and the molten metal-slag interface passage time point to the foregoing Measuring the moving distance of the electrode by the slag-atmosphere interface passing time point as the aforementioned slag layer thickness; and measuring the moving distance of the electrode by passing the time point from the molten metal-slag interface to the fixed point, As the distance from the fixed point to the surface of the molten metal layer. 15.—A method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer, which is measured above the opening of the conductive container that contains the molten metal floating on the surface of the molten metal layer and has conductivity. The distance from a fixed point of a predetermined distance set from the container to the surface of the molten metal layer; and the method of the thickness of the slag layer, characterized in that the electrode is determined by the foregoing setting in the atmospheric layer occupying the upper layer of the slag layer. Lit ------ f, (Please read the precautions on the back before filling out this page), 1T Line 1 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with Chinese National Standards (CNS) Α4 specifications (210 × 297 Mm) -48- 528853 A8 B8 C8 D8 6. The scope of the patent application is 8 points. The slag layer is moved down to the molten metal layer, and the conductivity between the conductive container and the electrode after the molten metal is contained is monitored. The electrode characteristic is also the electrode-container characteristic. Detection: The electrode-container characteristic is absolutely insulated by the atmosphere when the electrode is in the atmosphere. To the point in time when the power generation property of the slag layer acting as an electrolyte after the electrode sinks into the slag layer is the time point at which the air-slag interface passes; and the electrode moves from the slag layer To the molten metal layer, the electrode-container characteristics are shifted from the power generation property to the time point based on the electrical conductivity of the molten metal layer, that is, the slag-molten metal interface passage time point, and measured from the fixed point to The slag-molten metal interface passing time point, the distance traveled by the electrode is taken as the distance from the fixed point to the surface of the molten metal layer; and the time at the atmospheric-slag interface passing time point to the slag-molten metal is measured. The moving distance of the electrode through the interface at the time point is used as the thickness of the slag layer. 16. According to the method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer according to item 14 of the scope of the patent application, a DC power source V cc with the electrode side as the cathode side is inserted between the electrode and the container. The impedance RX of this power supply in series, and the 直流 of the aforementioned DC power supply and the aforementioned impedance RX, when the electrode sinks into the dissolution layer, the potential of the electrode which is set to use the potential of the container as a reference potential is higher than that of the foregoing electrode. The reference potential is high and the paper size is in accordance with the Chinese National Standard (CNS) Α4 specification (210x297 cm) (Please read the precautions on the back before filling this page), printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -49- 528853 A8 B8 C8 D8 6. Scope of patent application 9 Make the electrode rise from the molten metal layer to the atmosphere, measure the potential of the electrode with respect to the reference potential, and detect that the potential of the electrode is determined by the reference The time point at which the potential changes to the aforementioned high potential is taken as the aforementioned point of passage of the molten metal-slag interface; The potential of the electrode changes from the aforementioned high potential to a lower potential than the reference potential as the aforementioned slag-atmosphere interface transit time 1 7 · Slag layer thickness and molten metal layer as described in item 15 of the scope of patent application A method for measuring the horizontal position of a surface, wherein an impedance RX in which a DC power source V cc having the electrode side as the cathode side is connected in series with the power source is inserted between the electrode and the container, and When the electrode sinks into the slag layer, the potential of the electrode using the potential of the container as a reference potential is set to a higher potential than the reference potential, and the electrode is lowered and moved from the atmospheric layer to the molten metal layer. Measuring the potential of the electrode for the reference potential, and detecting that the time point at which the potential of the electrode changes from a low potential lower than the reference potential to the high potential is the passage time point of the atmosphere-melting interface; The time point when the potential of the electrode changes from the high potential to the reference potential is defined as Said slag - the molten metal through the interface point in time. 1 8 · The method for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer according to any one of the claims 14 to 17 in the scope of patent application, in which the Chinese paper standard (CNS) A4 (210 X 297 mm) L ——, ------ #-I (Please read the notes on the back before filling in this page) Thread 1 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-50- 528853 A8 B8 C8 D8 VI. The scope of the patent application 10. The method of making the moving speed of the electrode moving up or down and moving the electrode from the molten metal layer to the atmospheric layer is measured by the molten metal-slag The moving time of the electrode from the interface passing time point to the foregoing slag-atmosphere interface passing time is used for the calculation of the thickness of the slag layer, and the moving time of the electrode from the passing time of the molten metal-slag interface to the fixed point is measured. For calculating the distance from the fixed point to the surface of the molten metal layer, the electrode is moved downward from the atmospheric layer to the aforementioned electrode. In the case of the method of melting the metal layer, the movement time of the electrode from the fixed point to the passing time of the slag-molten metal interface is measured as the distance calculation from the fixed point to the surface of the molten metal layer, and the atmosphere-melting is measured. The movement time of the electrode from the slag interface passage time point to the slag-molten metal interface passage time point is used for the calculation of the slag layer thickness, and each of the electrodes is obtained from the movement speed and the movement time using the calculation. The aforementioned moving distance measures instead of measuring each of the aforementioned moving distances of the electrodes. , 19 · A device for measuring the thickness of a slag layer and the horizontal position of the surface of a molten metal layer, comprising: an electrode; and a molten metal used to contain the slag layer floating on the surface of the molten metal layer. Standard (CNS) A4 specification (210X297 mm) LIL ------? (Please read the precautions on the back before filling this page), 1T Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employee Consumption Cooperative 528853 A8 B8 C8 D8 6. Scope of patent application 11: a container with conductivity; and the electrode is moved from the molten metal layer to the atmospheric layer occupying the upper layer of the slag layer in the atmospheric layer occupying the upper layer of the slag layer and located above the opening of the container and separated from the container in advance. A fixed point at a certain distance, or an electrode moving means for moving from the fixed point in the atmospheric layer to the molten metal layer through the slag layer; and between the electrode and the container, inserting the electrode side as the cathode side The impedance RX of the DC power source V cc in series with this power source, and the 値 of the aforementioned DC power source and the aforementioned impedance RX is When the electrode sinks into the slag layer, a measurement circuit for setting the potential of the electrode using the potential of the container as a reference potential to be higher than the reference potential is set; and a measurement circuit for measuring the electrode with respect to the reference potential is formed. Means for measuring potential; and for measuring the thickness of the slag layer, measuring the time from the time when the basic potential changes to the high potential detected by the potential measuring means to the time when the high potential changes to the reference potential The slag of the moving distance of the potential at the time point of the low low potential, or the moving distance of the electrode from the time point of changing the low potential to the high potential to the time of changing the high potential to the reference potential Measurement method of electrode movement distance for layer thickness measurement; and. As a distance measurement from the fixed point to the surface of the molten metal layer, it measures the time from the reference potential to the high potential detected by the potential measurement means. Point to the fixed point, or from the fixed point to the previous high potential change The paper size of the aforementioned electrode at the time of the basic potential is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page), 1T Consumer Affairs Cooperative, Intellectual Property Bureau, Ministry of Economic Affairs Printed 528853 A8 B8 C8 D8 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 6. Application for patents. Scope of patent: 12 Moving distance measurement method for the horizontal position of the molten metal layer surface. 2 0 — A device for measuring the thickness of the slag layer and the horizontal position of the surface of the molten metal layer, comprising: an electrode; and a container with conductivity for containing molten metal floating on the surface of the molten metal layer on the surface of the molten metal layer; It is necessary to make the moving speed constant so that the electrode moves from the molten metal layer to the atmospheric layer occupying the upper layer of the slag layer through the molten slag. The electrode is located above the opening of the container at a predetermined distance separated from the container in advance. A fixed point, or an electrode moving means for moving from the fixed point in the atmospheric layer to the molten metal layer through the slag layer; and between the electrode and the container, inserting a DC power source V cc with the electrode side as the cathode side and The impedance RX of the power supply is connected in series, and the 直流 of the DC power source V cc and the impedance RX is set to form the potential of the container as a reference potential when the electrode sinks into the slag layer, and the potential of the electrode is higher than the potential of the electrode. Circuit for measuring a potential with a high reference potential; and a circuit for measuring the aforementioned electrode with respect to the reference potential Potential measurement means; and. As the slag layer thickness measurement, from the time point when the potential measurement method changes from the basic potential to the high potential detected by the potential measurement means to when the high potential changes from the high potential to the previous The time of movement of the aforementioned potential at the time when the reference potential is low, or from the aforementioned low potential to the aforementioned ΓΓΓΓ ----- f (Please read the precautions on the back before filling in this page) Align a piece of paper The scale applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -53- 528853 A8 B8 C8 D8 VI. Patent application scope 13 The time point from the high potential to the time point when the high potential changes to the reference potential The measurement method of the electrode movement time for measuring the thickness of the slag layer according to the movement time; and for measuring the distance from the fixed point to the surface of the molten metal layer, the change in the reference potential detected by the potential measurement means to the foregoing is measured. The time point from the high potential to the fixed point, or from the fixed point to the previous potential The electrode moving time measuring means for measuring the horizontal position of the molten metal layer surface at the time of the moving time of the electrode; and the electrode moving distance for calculating the moving distance of the electrode from the moving speed and the moving time of the electrode by calculation Computing means. ---- IP— (Please read the notes on the back before filling out this page) Order-line 'Printed on the paper by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives This paper applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -54-