System and method for controlling auto push of injector

Abstract

The technical idea of the present disclosure provides an auto-push control system comprising: a reactor comprising an outer wall; an injector configured to penetrate the outer wall of the reactor and be inserted into the reactor; a sensor placed in the injector; and a controller configured to control an insertion distance or an insertion rate of the injector into the reactor, wherein the controller is further configured to: calculate a loss length of the injector based on a signal from the sensor; and compensate for the insertion distance of the injector based on an insertion length depending on a preset insertion rate of the injector and the calculated loss length of the injector.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an auto-push control system and an auto-push control method of an injector. Specifically, the present disclosure relates to an auto-push control system and an auto-push control method that detect, in an injector inserted at a constant rate into the inside of a reactor, the length of the injector lost due to heat and / or friction inside the reactor and compensate for the corresponding length.BACKGROUND

[0002] In processes such as direct reduction smelting (DRS) performed in a reactor, an injector is provided to supply oxygen, cooling water, nitrogen, carbon, and the like into the interior of the reactor. As the injector is inserted into the reactor, cracks and wear due to thermal shock may occur due to thermal shock due to the high-temperature environment inside the reactor, and replacement of the injector accordingly requires substantial time and cost.

[0003] As a solution to this, it is being considered to adopt an auto-push function of the injector so that the injector is inserted at a constant rate toward the inside of the reactor. However, it is difficult to identify the remaining length of the injector inserted into the reactor in real time, making it difficult to maintain the gap between the distal end of the injector and the outer wall of the reactor.

[0004] When the gap between the distal end of the injector and the outer wall of the reactor is too large, damage to the distal end of the injector will worsen and the injector replacement cycle will be shortened, and when the gap between the distal end of the injector and the outer wall of the reactor is too small, the refractory material on the outer wall of the reactor may be damaged due to the high temperature at the distal end of the injector that discharges oxygen or the like.SUMMARY

[0005] Even with the above-mentioned auto-push function of the injector, it is difficult to maintain the gap between the distal end of the injector inside the reactor and the outer wall of the reactor, and the refractory material of the injector or the outer wall may be deformed and / or damaged by heat. Embodiments of the present disclosure relate to an injector auto-push control system and an auto-push control method that can solve the above-mentioned problems.

[0006] In order to solve the above-mentioned problem, the technical idea of the present disclosure provides an auto-push control system comprising: a reactor comprising an outer wall; an injector configured to penetrate the outer wall of the reactor and be inserted into the reactor; a sensor placed in the injector; and a controller configured to control an insertion distance or an insertion rate of the injector into the reactor, wherein the controller is further configured to: calculate a loss length of the injector based on a signal from the sensor; and compensate for the insertion distance of the injector based on an insertion length depending on a preset insertion rate of the injector and the calculated loss length of the injector.

[0007] In exemplary embodiments the sensor comprises a first sensor and a second sensor, and distances from a distal end of the injector to positions of the first sensor and the second sensor are different.

[0008] In exemplary embodiments the sensor further comprises a third sensor, and wherein the first sensor, the second sensor, and the third sensor are positioned at a regular interval in a longitudinal direction of the injector.

[0009] In exemplary embodiments the regular interval between the positions of the first sensor, the second sensor, and the third sensor ranges between 50 mm and 150 mm.

[0010] In exemplary embodiments the compensation length (Lc) of the injector inserted for compensation is calculated by an equation: LC = S - Ln wherein, in the equation, S corresponds to a straight line distance from a molten metal blow-in part of the injector to the sensor, and wherein, in the equation, Ln corresponds to an auto-push insertion length derived by a product of a preset insertion rate (vn) of the injector and a time required for insertion.

[0011] In exemplary embodiments the outer wall of the reactor comprises a plurality of refractory bricks.

[0012] In exemplary embodiments the outer wall of the reactor comprises a plurality of refractory bricks, wherein the plurality of refractory bricks comprise cone-shaped bricks and square bricks, wherein the cone-shaped bricks are arranged to surround the injector, and wherein the square bricks are arranged to be spaced apart from the injector.

[0013] In exemplary embodiments the sensor is a thermocouple sensor.

[0014] In exemplary embodiments a plurality of sensors are provided and successively arranged along a longitudinal direction of the injector.

[0015] In exemplary embodiments the injector comprises a first injector and a second injector, wherein the first injector is configured to supply oxygen to the reactor, and wherein the second injector is configured to supply carbon to the reactor.

[0016] In exemplary embodiments the injector has a cylindrical shape, and wherein the sensor is placed inside the injector.

[0017] In order to solve the above-mentioned problem, the technical idea of the present disclosure provides an auto-push control method using the auto-push control system according to claim 1, the auto-push control method comprising: supplying a reactant into the reactor via the injector; inserting the injector into the reactor at a constant rate; recognizing, by the sensor, a signal and transmitting the signal to the controller; and calculating, by the controller, a difference between the insertion length depending on the preset insertion rate of the injector and a distance from a distal end of the injector to the position of the sensor, and compensating for the insertion distance of the injector.

[0018] In exemplary embodiments the injector comprises a first injector and a second injector, wherein the first injector is configured to supply oxygen to the reactor, wherein the second injector is configured to supply carbon to the reactor, and wherein the insertion rate of the first injector into the reactor is higher than that of the second injector.

[0019] With the auto-push control system and auto-push control method of the present disclosure, by maintaining a constant gap between the distal end of an injector inserted into a reactor and a refractory material on the outer wall of the reactor, deformation and damage to the refractory material due to heat can be minimized. Furthermore, with the auto-push control system and auto-push control method of the present disclosure, operation productivity can be improved by shortening the maintenance time of the injector and refractory material.BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a view illustrating the configuration of an auto-push control system according to an embodiment. FIGS. 2A and 2B are enlarged views of area A in FIG. 1. FIG. 3 is a view illustrating an injector, a sensor, and controller. FIG. 4 is an enlarged view of area B in FIG. 3. FIG. 5 is a view illustrating the configuration of an auto-push control system according to another embodiment. FIG. 6 is a flowchart of an auto-push control method according to an embodiment. DETAILED DESCRIPTION

[0021] Embodiments of the present disclosure are exemplified for describing the technical idea of the present disclosure. The scope of rights according to the present disclosure is not limited to the embodiments presented below or the specific description of these embodiments.

[0022] All technical terms and scientific terms used in the present disclosure have meanings that are commonly understood by a person ordinarily skilled in the art to which the present disclosure belongs unless otherwise defined. All of the terms used in the present disclosure are selected for the purpose of describing the present disclosure more clearly, and are not selected to limit the scope of rights according to the present disclosure.

[0023] As used in the present disclosure, expressions such as "comprising", "including", "having", and the like are to be understood as open-ended terms having the possibility of encompassing other embodiments, unless otherwise mentioned in the phrase or sentence including such expressions.

[0024] The singular expressions that are described in the present disclosure may encompass the meanings of plural expressions unless otherwise mentioned, which will be also applied to the singular expressions recited in the claims.

[0025] As used in the present disclosure, expressions such as "first", "second", and the like are used to distinguish a plurality of elements from each other, and are not intended to limit an order or importance of the corresponding elements.

[0026] When a certain component is described as being "coupled to" or "connected to" another component, this is to be understood as having a meaning that the certain component may be coupled or connected directly to the other component or that the certain component may be coupled or connected to the other component via another new component.

[0027] The present disclosure is not limited only by the dimensions and numerical values described herein. Unless otherwise specified, these dimensions and numerical values may be understood to mean the stated values and equivalent ranges including the values. For example, a dimension "50 mm" described herein may be understood to include "about 50".

[0028] In the present disclosure, the term "molten metal blow-in part" may be understood to mean a part of an injector that first comes into contact with the molten metal inside the reactor when the injector in its initial state is inserted into the reactor. In contrast, the term "end of injector" may be understood to mean the part of the injector furthest from the refractory material in the remaining length of injector when loss occurs in the injector when the injector is inserted into the reactor.

[0029] Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings. In the accompanying drawings, identical or corresponding components are assigned the same reference numerals. In addition, in the description of the following embodiments, redundant descriptions of identical or corresponding components may be omitted. However, even if a description of a component is omitted, such a component is not intended to be excluded from an embodiment.

[0030] FIG. 1 is a view illustrating the configuration of an auto-push control system 1 according to an embodiment. FIGS. 2A and 2B are enlarged views of area A in FIG. 1.

[0031] Referring to FIGS. 1, 2A, and 2B, the auto-push control system 1 is configured to maintain the gap between the outer wall of a reactor and the distal end of an injector inserted into the reactor to supply oxygen, carbon, nitrogen, water for cooling, and the like into the reactor. When the gap between the distal end of the injector and the outer wall of the reactor is too large, damage to the distal end of the injector will worsen and the injector replacement cycle will be shortened, and when the gap between the distal end of the injector and the outer wall of the reactor is too small, the refractory material on the outer wall of the reactor may be damaged due to the high temperature at the distal end of the injector that discharges oxygen or the like. Accordingly, it is essential to maintain the gap between the distal end of the injector and the outer wall of the reactor in order to prevent deformation and damage to the refractory material that forms a portion of the outer wall of the reactor.

[0032] The auto-push control system 1 may include a reactor 11, an injector 12, a sensor 13, and a controller 14.

[0033] The reactor 11 may include an outer wall 110 and an internal space C. The outer wall 110 is arranged to surround the surface of the reactor, and the internal space C may correspond to the space inside the reactor defined by the outer wall 110. The outer wall 110 may be formed of a heat-resistant material. The outer wall 110 may include an iron shell 111 and a plurality of refractory bricks 112. The iron shell 111 may form the outermost surface of the outer wall 110. The iron shell 111 is capable of preventing high-temperature materials filled in the internal space C from leaking. The refractory bricks 112 may be arranged adjacent to the inner wall of the iron shell 111. The refractory bricks 112 may be made of an oxide material such as Mg or Cr and minimize heat from the high-temperature materials filled in the internal space C being discharged to the outside. The refractory bricks 112 may include cone-shaped bricks 112a and square bricks 112b. The cone-shaped bricks 112a may have a horn shape or a truncated shape of which the cross-sectional area increases from the outside to the inside of the reactor 11. The cone-shaped bricks 112a may be arranged to surround the injector 12. The square bricks 112b may have a regular hexahedron or rectangular parallelepiped shape. The square bricks 112b may be arranged to be spaced apart from the injector 12.

[0034] The internal space C may correspond to the space surrounded by the outer wall 110. The internal space C may be filled with molten high-temperature materials. The molten high-temperature materials may include, for example, lead concentrate, lead scrap, and lead byproducts.

[0035] The injector 12 may be arranged to penetrate the outer wall 110 of the reactor 11. The injector 12 may be formed in a cylinder type. The injector 12 is capable of supplying reaction materials (for example, oxygen in the oxidation zone, and carbon in the reduction zone), water for cooling, and other gases to the internal space C of the reactor 11. The injector 12 inserted into the reactor 11 may come into direct contact with the high-temperature materials filled in the internal space C of the reactor 11. Accordingly, the injector 12 may be manufactured from a heat-resistant material.

[0036] The injector 12 may be gradually inserted in a direction F toward the inside of the reactor 11. That is, the injector 12 may be pushed to be gradually inserted into the internal surface C through the outer wall 110 of the reactor 11. This is defined as the auto-push of the injector. In an embodiment, the injector 12 may be inserted into the reactor 11 in the direction F at a constant rate. For example, the injector 12 in the oxidation zone may be inserted at a rate of 0.2 mm / hr, and the injector 12 in the reduction zone may be inserted at a rate of 0.1 mm / hr. Since the injector 12 is gradually pushed into the reactor 11, even when length loss occurs at the distal end 12A of the injector 12 due to wear and cracks due to high temperature, the gap between the outer wall 110 of the reactor 11 and the distal end 12A of the injector 12 can be maintained to a certain extent.

[0037] The sensor 13 is capable of detecting the length lost by the distal end 12A of the injector 12 due to long-term exposure to a high temperature. The sensor 13 may be placed on the injector 12. The sensor 13 may be placed inside the cylinder-type injector 12. The sensor 13 may include a plurality of sensors 13. For example, the sensor 13 may include a first sensor 13a and a second sensor 13b. The sensor 13 may further include a third sensor 13c. The sensor 13 may further include a fourth sensor 13d. The distances from the molten metal blow-in part 121 of the injector 12 to the plurality of sensors 13 may be different from each other. The distance from the molten metal blow-in part 121 to the sensor 13 will be described in more detail below with reference to FIGS. 3 and 4.

[0038] The sensor 13 may include all of common sensors capable of detecting whether the reactor is operational (e.g., on / off). Preferably, the sensor may include a sensor capable of detecting heat or an increase in temperature. More preferably, the sensor may be a thermocouple sensor. The thermocouple sensor is a device made of two types of metals to measure temperature over a wide range by using the Seebeck effect.

[0039] Sensors 13 according to another embodiment may be successively arranged along the longitudinal direction of the injector 12. When the sensors 13 are successively arranged along the longitudinal direction of the injector 12, the length at which the injector 12 is inserted into the reactor 11 can be appreciated in real time.

[0040] The controller 14 may be connected to the distal end opposite to the molten metal blow-in part 121 of the injector 12. The controller 14 may receive signals from the sensor 13. The controller 14 may adjust the rate and / or length at which the injector 12 is inserted into the reactor 11 in the direction F. The controller 14 may calculate the loss length S of the injector 12 based on the signals from the sensor 13. The controller 14 may calculate the auto-push insertion length L n depending on the insertion rate v n of the injector 12 and the elapsed time. The controller 14 may compensate for a compensation length L c based on the loss length S and the auto-push insertion length L n of the injector 12. That is, the controller 14 may calculate the difference between the loss length S and the auto-push insertion length L n of the injector 12 and insert the injector 12 to compensate for the compensation length L c by the difference.

[0041] A method of determining the insertion compensation length L c by the controller 14 will be described in detail with reference to FIGS. 2A and 2B. FIG. 2A illustrates the injector 12 before wear occurs. FIG. 2B illustrates the injector 12 at the moment when the first sensor 13a detects loss of the injector and generates a signal. Referring to FIG. 2A, the second sensor 13b is located in line with the refractory bricks 112 before the injector 12 wears out. While the injector 12 is worn out by heat, the injector 12 is movable toward the inside of the reactor 11. Preferably, the injector 12 is movable at a constant rate v n toward the inside of the reactor 11. The injector 12 is gradually worn from the molten metal blow-in part 121 by the high-temperature materials stored inside the reactor 11, and when the injector 12 is worn to the position where the first sensor 13a is placed, the first sensor 13a may detect this and transmit a signal to the controller 14. The distance from the molten metal blow-in part 121 to the first sensor 13a corresponds to the loss length S of the injector 12. While the injector 12 is lost by the loss length S, the injector 12 may move at a constant rate v n and be inserted into the reactor 11 by the auto-push insertion length L n . At this time, in order to maintain the distance T from the distal end 12A of the injector 12 to the refractory bricks 112 constant, it is necessary compensate for a length obtained by subtracting the auto-push insertion length L n from the loss length S of the injector 12. That is, when the value obtained by subtracting the auto-push insertion length L n from the loss length S of the injector 12 is a positive number, the controller 14 may additionally insert the injector 12 into the reactor 11 by the compensation length L c . When the value obtained by subtracting the auto-push insertion length L n from the loss length S of the injector 12 is a negative number, the controller 14 may withdraw the injector 12 outward from the reactor 11 by the compensation length L c . That is, the compensation length L c is a length obtained by subtracting the auto-push insertion length L n from the loss length S of the injector 12.

[0042] For example, when the distance from the molten metal blow-in part 121 to the first sensor 13a is 100 mm, the first sensor 13a may detect the loss of the injector 12 due to wear of the injector 12 and generate a signal, thereby calculating the loss length S of the injector 12. That is, the loss length S of the injector 12 at this time is 100 mm. Based on the period of time from the time of insertion of the injector 12 to the time of detection of the first sensor 13a and the auto-push rate of the injector 12, the auto-push insertion length L n may be calculated. For example, when the auto-push rate is 0.2 mm / hr and the first sensor 13a detects the loss of the injector 12 after exactly 15 days, the auto-push insertion length L n is calculated by 15 days x 24 hrs x 0.2 mm / hr and corresponds to 72 mm. In this case, since the auto-push insertion length L n of the injector 12 by auto-push is only 72 mm while the injector 12 is worn by the loss length S of 100 mm, the compensation length L c of 28mm, which is the difference between the two lengths may be compensated for.

[0043] FIG. 3 illustrates an injector 12, sensors 13, and a controller 14. FIG. 4 is an enlarged view of area B in FIG. 3. Referring to FIGS. 3 and 4, a plurality of sensors 13 may be disposed inside the injector 12. The sensors 13 may include a first sensor 13a, a second sensor 13b, a third sensor 13c, and a fourth sensor 13d. The distances from the distal end 12A of the injector 12 to the first sensor 13a, the second sensor 13b, the third sensor 13c, and the fourth sensor 13d may be different from each other. The first sensor 13a, the second sensor 13b, the third sensor 13c, and the fourth sensor 13d may be positioned at a regular interval in the longitudinal direction of the injector 12. For example, the distance L1 from the distal end 12A of the injector to the first sensor 13a may be 50 mm to 150 mm. The distance L2 between the first sensor 13a and the second sensor 13b may correspond to the distance L3 between the second sensor 13b and the third sensor 13c. The distance L3 between the second sensor 13b and the third sensor 13c may correspond to the distance L4 between the third sensor 13c and the fourth sensor 13d. In this case, L2, L3, and L4 may be 50 mm to 150 mm.

[0044] FIG. 5 is a view illustrating the configuration of an auto-push control system 2 according to another embodiment.

[0045] The description of the auto-push control system according to the embodiment described above with reference to FIGS. 1 to 4 also applies to the auto-push control system according to another embodiment to be described later with reference to FIG. 5. Hereinafter, with reference to FIG. 5, an auto-push control system according to another embodiment will be described, focusing on differences from the above-described embodiment.

[0046] Referring to FIG. 5, the auto-push control system 2 may include two internal spaces C1 and C2, two injectors 221 and 222, two sets of sensors 231 and 232, and two controllers 241 and 242.

[0047] The reactor 21 may include two internal spaces C1 and C2. The internal spaces C1 and C2 include a first internal space C1 and a second internal space C2. The first internal space C1 and the second internal space C2 may be separated by a partition wall 25. The partition wall 25 may include a communication hole 25a. The communication hole 25a may be formed in a direction crossing the partition wall 25 to allow the first internal space C1 and the second internal space C2 to be in fluid communication with each other. In another embodiment, the first internal space C1 and the second internal space C2 may be completely blocked by the partition wall 25 to form spaces independent from each other.

[0048] For example, the first internal space C1 is an oxidation zone, and the first injector 221 inserted into the oxidation zone supplies oxygen, nitrogen, and water for cooling to the first internal space C1. The average temperature of the first internal space C1 may range, for example, from 1,000 degrees C to 1,150 degrees C. The second internal space C2 is a reduction zone, and the second injector 222 inserted into the reduction zone supplies carbon C for reaction and water for cooling to the second internal space C2. The average temperature of the second internal space C2 may range, for example, from 1,100 degrees C to 1,250 degrees C.

[0049] Since the first injector 221 supplies oxygen as a heat source, an oxidation reaction may occur around the distal end (e.g., the distal end 12A in FIGS. 2A and 2B) of the first injector 221, and the temperature in region X may range from about 1,500 degrees C to 1,600 degrees C. On the other hand, the second injector 221 may supply carbon. The second injector 221 may not supply oxygen. In this case, since no oxidation reaction occurs around the distal end 12A of the second injector 222, the temperature in region Y may range from about 1,200 degrees C to 1,300 degrees C. That is, since the temperature range of the surrounding region of the first injector 221 (e.g., region X) is higher than the temperature range of the surrounding region of the second injector 222 (e.g., region Y), wear of the distal end of the injector described above with reference to FIGS. 1 to 4 may occur relatively actively in the first injector 221. Accordingly, the insertion rate v 1 of the first injector 221 into the internal space C1 may be higher than the insertion speed v 2 of the second injector 222 into the internal space C2. For example, the first injector 221 may be inserted into the interior at a rate of 0.2 mm / hr. For example, the second injector 222 may be inserted into the interior at a rate of 0.1 mm / hr.

[0050] FIG. 6 is a flowchart of an auto-push control method S300 according to an embodiment. The auto-push control method S300 includes steps of: supplying a reactant into a reactor via an injector (S310); inserting the injector into the reactor at a constant rate (S320); measuring, by a sensor, the loss length of the injector (S330); transmitting a signal from the sensor to the controller (S340), and calculating, by a controller, an insertion length depending on a preset insertion rate of the injector and a difference in distance from a molten metal blow-in part of the injector to the position of the sensor and compensating for the insertion distance of the injector (S350).

[0051] The step of calculating, by a controller (e.g., the controller 14 in FIG. 1), the insertion length depending on the preset insertion rate of the injector (e.g., the injector 12 in FIG. 1) and a difference in distance from the molten metal blow-in part (e.g., the molten metal blow-in part 121 in FIG. 2A) of the injector 12 to the position of the sensor (e.g., the sensor 13 in FIG. 1) and compensating for the insertion distance of the injector 12 (S350) may be executed through the process described above with reference to FIGS. 2A and 2B.

[0052] Although process steps, method steps, algorithms, and the like are illustrated in a sequential order in the flow chart of FIG. 6, such processes, methods, and algorithms may be configured to operate in any suitable order. In other words, the steps of the processes, methods, and algorithms described in various embodiments of the present disclosure need not be performed in the order described in the present disclosure. In addition, although some steps are described as being performed non-simultaneously, in other embodiments, the some steps may be performed simultaneously. In addition, exemplification of a process in a drawing does not imply that the exemplified process excludes other changes and modifications thereto, that the exemplified process or any of steps thereof are essential to one or more of the various embodiments of the present disclosure, or that the exemplified process is desirable.

[0053] With the auto-push control system and auto-push control method according to the above-described embodiments, unnecessary loss of an injector (e.g., the injector 12 in FIG. 1) can be prevented, and deterioration and damage to refractory bricks (e.g., the refractory bricks 112 in FIG. 1) arranged around the injector 12 can be reduced. Furthermore, since the deterioration and damage to the refractory brick 112 are reduced, the maintenance time and cost of a reactor (e.g., the reactor 11 in FIG. 1) can be shortened, and operating productivity can be increased.

[0054] In the foregoing, the technical idea of the present disclosure has been described with reference to some embodiments and examples illustrated in the accompanying drawings. However, it is to be understood that various substitutions, modifications, and alterations may be made without departing from the technical idea and scope of the present disclosure that can be understood by a person ordinarily skilled in the technical field to which the present disclosure pertains. In addition, such substitutions, modifications, and alterations are to be considered as falling within the scope of the appended claims.

Claims

1. An auto-push control system comprising: a reactor comprising an outer wall; an injector configured to penetrate the outer wall of the reactor and be inserted into the reactor; a sensor placed in the injector; and a controller configured to control an insertion distance or an insertion rate of the injector into the reactor, wherein the controller is further configured to: calculate a loss length of the injector based on a signal from the sensor; and compensate for the insertion distance of the injector based on an insertion length depending on a preset insertion rate of the injector and the calculated loss length of the injector.

2. The auto-push control system of Claim 1, wherein the sensor comprises a first sensor and a second sensor, and distances from a distal end of the injector to positions of the first sensor and the second sensor are different.

3. The auto-push control system of Claim 2, wherein the sensor further comprises a third sensor, and wherein the first sensor, the second sensor, and the third sensor are positioned at a regular interval in a longitudinal direction of the injector.

4. The auto-push control system of Claim 3, wherein the regular interval between the positions of the first sensor, the second sensor, and the third sensor ranges between 50 mm and 150 mm.

5. The auto-push control system of Claim 1, wherein the compensation length (Lc) of the injector inserted for compensation is calculated by an equation below: L c = S - L n wherein, in the equation, S corresponds to a straight line distance from a molten metal blow-in part of the injector to the sensor, and wherein, in the equation, Ln corresponds to an auto-push insertion length derived by a product of a preset insertion rate (vn) of the injector and a time required for insertion.

6. The auto-push control system of Claim 1, wherein the outer wall of the reactor comprises a plurality of refractory bricks.

7. The auto-push control system of Claim 6, wherein the outer wall of the reactor comprises a plurality of refractory bricks, wherein the plurality of refractory bricks comprise cone-shaped bricks and square bricks, wherein the cone-shaped bricks are arranged to surround the injector, and wherein the square bricks are arranged to be spaced apart from the injector.

8. The auto-push control system of Claim 1, wherein the sensor is a thermocouple sensor.

9. The auto-push control system of Claim 1, wherein a plurality of sensors are provided and successively arranged along a longitudinal direction of the injector.

10. The auto-push control system of Claim 1, wherein the injector comprises a first injector and a second injector, wherein the first injector is configured to supply oxygen to the reactor, and wherein the second injector is configured to supply carbon to the reactor.

11. The auto-push control system of Claim 1, wherein the injector has a cylindrical shape, and wherein the sensor is placed inside the injector.

12. An auto-push control method using the auto-push control system according to claim 1, the auto-push control method comprising: supplying a reactant into the reactor via the injector; inserting the injector into the reactor at a constant rate; recognizing, by the sensor, a signal and transmitting the signal to the controller; and calculating, by the controller, a difference between the insertion length depending on the preset insertion rate of the injector and a distance from a distal end of the injector to the position of the sensor, and compensating for the insertion distance of the injector.

13. The auto-push control method of claim 12, wherein the injector comprises a first injector and a second injector, wherein the first injector is configured to supply oxygen to the reactor, wherein the second injector is configured to supply carbon to the reactor, and wherein the insertion rate of the first injector into the reactor is higher than that of the second injector.

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