WO2015020261A1 - Device for preventing slag outflow and high pressure gas injection lance used therein - Google Patents

Device for preventing slag outflow and high pressure gas injection lance used therein Download PDF

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Publication number
WO2015020261A1
WO2015020261A1 PCT/KR2013/008424 KR2013008424W WO2015020261A1 WO 2015020261 A1 WO2015020261 A1 WO 2015020261A1 KR 2013008424 W KR2013008424 W KR 2013008424W WO 2015020261 A1 WO2015020261 A1 WO 2015020261A1
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WIPO (PCT)
Prior art keywords
pressure gas
high pressure
wall
lance
injection lance
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PCT/KR2013/008424
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French (fr)
Korean (ko)
Inventor
박진철
강대운
Original Assignee
(주)우진
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)우진 filed Critical (주)우진
Priority to RU2014144902A priority Critical patent/RU2014144902A/en
Priority to EP13883844.6A priority patent/EP3031934A1/en
Priority to CN201380023895.4A priority patent/CN104540969A/en
Priority to JP2015531023A priority patent/JP5873220B2/en
Publication of WO2015020261A1 publication Critical patent/WO2015020261A1/en

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001Retaining slag during pouring molten metal
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • C21C5/4653Tapholes; Opening or plugging thereof

Definitions

  • the present invention relates to a slag outflow prevention device and a high-pressure gas injection lance used in the present invention, in particular by injecting a high-pressure inert gas to the vortex point of the upper exit port to push the slag from the exit port more easily and efficiently
  • a device for preventing slag outflow and a high pressure gas injection lance used therein is a device for preventing slag outflow and a high pressure gas injection lance used therein.
  • the molten iron manufactured in the blast furnace is transferred to the converter to perform refining operations such as oxygen scavenging and other alloying treatments, and then to the molten steel with the steel ladle seated on the steel truck.
  • refining operations such as oxygen scavenging and other alloying treatments
  • the molten steel (from the converter 100 to the steel ladle 110) as shown in FIG. 1. It is essential to separate the slag (S) from the molten steel (M) generated in the refining process during the step of tapping M) existing in the upper surface of the molten steel (M) due to the difference in specific gravity.
  • the component of the molten steel (M) that has undergone the refining process is slag (S).
  • the slag S having a specific gravity smaller than that of the molten steel M, which is generated during the refining operation of the molten steel M, is not to be mixed in the water ladle 110 so as not to be changed by the molten steel M.
  • the success of an effective tapping operation depends on how much the amount of slag (S) incorporated into the tapping ladle can be minimized.
  • the slag dart 120 having a funnel-shaped head filled with the inside of the head and a sleeve extending to the lower part of the head and inserted into the tap hole 102 is introduced into the tap hole 102 using a dart injector (not shown). By doing so, the slag S has been prevented from flowing out.
  • the conventional slag dart 120 is required to have a specific gravity of 3 to 6, which is an intermediate range of slag having a specific gravity of about 2.3 and molten steel having a specific gravity of about 7.8, but the density of the slag dart 120 is not appropriate.
  • the slag dart 120 prevents the molten steel M from completely tapping out too soon or too late, or the slag is mixed into the molten steel and spilled.
  • Patent Document 1 Registered Patent No. 882819 (announced on October 13, 2008), Name: slag dart
  • Patent Document 2 Registered Patent No. 105834 (August 24, 2011), Name: Slag dart using recovered and recycled magnesia chromium-based refractory material and method for producing same
  • the present invention has been made to solve the above-described problem, the high pressure inert gas is injected into the vortex point of the tapping outlet to push the slag from the tapping outlet slag outflow to more easily and efficiently prevent slag outflow It is an object to provide a prevention device and a high pressure gas injection lance used therein.
  • High pressure gas injection lance for preventing slag outflow is composed of a two-layered cylindrical body of the inner wall and the outer wall of which the tip is closed, the space defined by the inner wall forms a high pressure gas path And a pipe structure in which a cylindrical partition wall having a tip spaced apart from a closed tip of the inner wall and the outer wall is formed in a space between the inner wall and the outer wall to form a circulation path of cooling water; It comprises a nozzle bundle for injecting the high pressure gas downward and the adapter for connecting the injection pipe structure and the nozzle bundle so that the ejection direction of the high pressure gas is converted.
  • At least the inner wall outer circumferential surface or the partition wall outer circumferential surface is formed with a spiral guide protrusion.
  • the nozzle assembly is made of a hollow nozzle body and the needle body is inserted into the nozzle body and comprises a needle valve for injecting high pressure gas at high speed through the tip of the nozzle body, the nozzle body is a diffusion nozzle with the needle valve It is characterized by forming.
  • elevating means for elevating the needle valve with respect to the nozzle body, wherein the needle valve is formed of a hollow cylindrical body having a through end penetrating through a wall having a closed end portion having an elongated shape having a narrow cross section at the center thereof. It is possible to adjust the injection angle of the high-pressure gas by lifting the needle valve in the nozzle body by means.
  • the adapter has a hollow fitting member, one side of which is in communication with the pipe structure, and a female screw, which is screwed with a male screw formed in the nozzle body, on one side thereof, and on one side thereof, a connection portion communicating with the other side of the fitting member is formed.
  • a female screw which is screwed with a male screw formed in the nozzle body, on one side thereof, and on one side thereof, a connection portion communicating with the other side of the fitting member is formed.
  • the slag outflow prevention device includes an injection lance of one of the features described above; A high pressure gas injector for injecting high pressure gas through the injection lance; Lance inclination angle adjusting unit for adjusting the inclination angle of the injection lance; A lance forward and backward driving unit which drives the injection lance back and forth; And a control unit configured to collectively control the cooling water circulation unit for circulating the cooling water into the injection lance and the high pressure gas injection unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit, and the cooling water circulation unit.
  • the communication unit for receiving the transmission information related to the tapping from the converter control equipment via a wired / wireless communication network further comprising, the control unit based on the converter information received through the communication unit for the high-pressure gas distribution It characterized in that the control unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit and the cooling water circulation.
  • the slag outflow prevention device of the present invention by injecting a high pressure inert gas to the vortex point of the upper exit port to push the slag from the exit port more easily and efficiently to prevent slag outflow There is a number.
  • 1 is a view for explaining the problem of the conventional slag leakage prevention device.
  • Figure 2 is an overall system configuration for explaining the concept of the slag leakage prevention apparatus of the present invention.
  • Figure 3 is an electrical block diagram of the slag leakage prevention apparatus of the present invention.
  • FIG. 4A and 4B are longitudinal cross-sectional views of the high-pressure gas injection lance in Fig. 2, respectively, and a cross-sectional view taken along line A-A in Fig. 4A;
  • Figure 5 is an exploded cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention.
  • Figure 6 is a cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention.
  • FIG. 7A and 7B are cross-sectional views of the needle valves of the nozzle bundles being raised or lowered in FIG. 6, respectively.
  • Figure 8 is a flow chart for explaining the operation of the slag leakage prevention apparatus of the present invention.
  • Figures 9a to 9f are respectively showing the state of the high-pressure gas injection lance and converter according to the step-by-step operation process of the slag outflow prevention device of the present invention.
  • FIG. 2 is an overall system configuration diagram for explaining the concept of the slag leakage prevention apparatus of the present invention
  • Figure 3 is an electrical block configuration diagram of the slag leakage prevention apparatus of the present invention.
  • the slag outflow prevention device of the present invention is a high-pressure gas injection lance (hereinafter simply referred to as 'injection lance') 150 through the inlet of the converter during tilting of the converter converter 100
  • 'injection lance' high-pressure gas injection lance
  • the slag (S) flows out through the tap hole 102 by pushing the slag (S) to the outer shell of the converter tap hole 102 by injecting a high pressure gas to the vortex generation point of the converter tap hole 102 in the state in which the It is preventing it from becoming.
  • the slag outflow prevention device of the present invention is a lance inclination angle adjustment unit 210 for adjusting the inclination angle of the injection lance 150 and the injection lance 150, before and after the lance for advancing or retracting the injection lance 150 with respect to the converter inlet.
  • High pressure gas injection unit 230 for injecting high pressure gas through the jin drive unit 220, injection lance 150, cooling water circulating unit for circulating the cooling water for cooling the injection lance 150 ( 240), by communicating with a converter control facility (not shown) by wire / wireless communication network, various types of information (hereinafter referred to as 'transformer information') in accordance with the departure from the converter control facility; On the basis of the communication unit 250 and the converter information receiving the information in real time to properly control the lance inclination angle adjusting unit 210, lance forward and backward driving unit 220, high-pressure gas injection unit 230 and the coolant circulation unit 240 Catch control unit 200 And it may be made.
  • the spray lance 150 may be installed around the converter 100 of the workplace in which the converter 100 is installed, where reference numeral 130 denotes a fixed support installed on the ceiling of the workplace, and 134 denotes a spray lance 150.
  • reference numeral 130 denotes a fixed support installed on the ceiling of the workplace
  • 134 denotes a spray lance 150.
  • the rear end of the injection lance support 134 (hereinafter, the forward direction is defined as forward) may be hinged up and down to the H-beam 136 vertically extending downward from the fixed support 130. have.
  • the tip of the injection lance support 134 may be elevated by the hoist wire 132 that is wound or unwound by the hoist motor 133 installed on the fixed support 130.
  • Reference numeral 138 denotes an injection lance carrier moving forward and backward at the injection lance support 132 while supporting the injection lance 150
  • reference numeral 139 denotes a power generating means for advancing and moving the injection lance carrier 138, for example. Represents a motor.
  • the lance inclination angle adjusting unit 210 may be implemented as an electric motor and its accompanying mechanism for reciprocating the piston of the hoist motor 133 and the hoist wire 132 or the hydraulic or pneumatic cylinder as described above, If necessary, a sensor for detecting an inclination angle may be further provided.
  • the lance forward and backward driving unit 220 may be implemented as an electric motor 139 for advancing and forwarding the injection lance carrier 138 or a compression pump (motor) for compressing hydraulic or pneumatic pressure and a solenoid valve or linear motor.
  • a sensor for detecting a forward or backward position or distance may be further provided.
  • the high pressure gas injection unit 230 may be implemented by, for example, a compression pump (motor) and a solenoid valve that compresses an inert gas such as argon (Ar) or nitrogen.
  • a compression pump motor
  • a solenoid valve that compresses an inert gas such as argon (Ar) or nitrogen.
  • Cooling water circulation unit 240 may be implemented as a circulation pump (motor).
  • the communication unit 250 may be implemented as a serial communication interface such as RS-232 or RS-485 or a local area network such as Ethernet.
  • the controller 200 may be implemented in a hardware or software manner.
  • FIG. 4A and 4B are longitudinal cross-sectional views of the high-pressure gas injection lance in FIG. 2, respectively, and a cross-sectional view taken along line A-A in FIG. 4A.
  • the injection lance 150 is applied to the slag outflow prevention device of the present invention, the inner and outer two layers, that is, the inner wall 154, the high pressure gas path 155a is formed in the center and the tip is closed.
  • a pipe structure having an outer wall 151, a nozzle bundle 158 for injecting high pressure gas downward, and an adapter 156 for connecting the injection pipe structure and the nozzle bundle 158 so that the ejection direction of the high pressure gas is changed, ( 157).
  • the cooling water for cooling the inside of the pipe structure by the separation gap is circulated, that is, the cooling water introduced into the cooling water inflow path 155b formed, for example, between the inner wall 154 and the partition wall 153, through the separation gap.
  • the coolant is circulated by the coolant outlet path 155c formed of a space between the 153 and the outer wall 151.
  • the space outside the partition 153 may be a coolant inflow path and the inner space may be a coolant outflow path.
  • spiral guide protrusions 154a and 153a may be additionally provided in the cooling water inflow path 155b and the cooling water outflow path 155c, for example, a triangular cross section. That is, a spiral guide protrusion 154a having a height of approximately 1/2 or more of the shortest distance between the inner wall 154 and the partition wall 13 is formed on the outer circumferential surface of the inner wall 154 of the pipe structure, and also on the outer circumferential surface of the partition wall 153.
  • a spiral guide protrusion 153a having a height of about 1/2 or more of the shortest distance between the partition wall 153 and the outer wall 151 is formed. Even if the cooling water introduced by the spiral guide protrusions 154a and 163a is insufficient or the injection lance is inclined, the cooling water may be lowered.
  • FIG. 5 is a separated cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention
  • Figure 6 is a combined cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention
  • 7A and 7B are cross-sectional views of the needles of the nozzle bundles respectively being raised or lowered in FIG. 6.
  • reference numeral 156 denotes a fitting member connecting the box structure 157 and the pipe structure as part of the adapter.
  • the fitting member 156 is formed with a high pressure gas flow path 156a laterally.
  • a horizontal extension portion 156b is formed which is inserted into the high pressure gas path 155a of the pipe structure, and the high pressure gas path 155a of the pipe structure is formed on the outer peripheral surface of the tip of the horizontal extension portion 156b.
  • a male screw 156c is screwed to the female screw (not shown) formed on the inner circumferential surface thereof, and is formed on the box structure 157 through a coupling through hole 157a formed at one side of the box structure 157 on the front side.
  • the male screw 156e which is screwed with the nut 157f in the inserted state is provided.
  • reference numeral 156d denotes a flange that is in contact with the tip of the pipe structure when the fitting member 156 is coupled, and the front surface of the flange 156d serves as an O-ring for preventing leakage of high pressure gas.
  • the above annular projection 156f is formed.
  • the box structure 157 is formed in a hollow box shape in which the above-described coupling through hole 157a is formed on one side and a communication hole 157b communicating with the nozzle bunch 158 is formed on the lower side.
  • the female screw 157c is formed on the circumferential wall of the communication hole 157b.
  • a lid 157d is formed on the top of the box structure 157 to allow access to the inside of the box structure 157 when opened, and the cover 157d normally closes the top of the box structure by bolts.
  • Reference numeral 157e denotes a sealing packing member
  • reference numeral 157g denotes an annular groove formed on the rear wall surface of the box structure 157 to be unevenly coupled to the annular projection 156f of the fitting member 156.
  • the nozzle bundle 158 is inserted into the hollow nozzle body 158a and the nozzle body 158a and includes a needle valve 158b for injecting high pressure gas at high speed through the tip of the nozzle body 158a.
  • the nozzle body 158a may be implemented in the form of a diffusion nozzle acting in pairs with the needle valve 158b, that is, the middle portion of the nozzle is narrowed and then widened again.
  • the free end (tip) portion of the nozzle body 158a has a cross section in which the inside thereof is widened in a fan shape, and 158a1 represents a bottleneck of the nozzle body 158a.
  • reference numeral 158a2 denotes a male screw that is formed on the upper outer circumferential surface of the nozzle body 158a and screwed to the female screw 157c formed on the lower surface of the box structure 157.
  • the needle valve 158b is formed of a hollow cylindrical body whose tip is closed, and at least one through hole 158b2 penetrates the wall of the cylindrical body in and out of the portion adjacent to the closed tip 158b3.
  • the closed tip portion 158b3 of the needle valve 18b has an elongated shape having a narrowest cross section at the center thereof, so that the injection angle of the high pressure gas is widened and narrowed as the needle valve 158b moves up and down the nozzle body 158a. do.
  • a female screw 158a3 is formed in place on the inner circumferential surface of the nozzle body 158a, and a male screw 18b5 screwed to the female screw 18a3 is formed at a corresponding portion of the outer circumferential surface of the needle valve 18b. Furthermore, at the rear end of the needle valve 158b, an operation head 18b4 which can be tightened and loosened by a tool such as a hand or a wrench is formed, for example, by turning the operation head 158b4 from side to side, the needle valve 158b can be raised and lowered inside the nozzle body 158a, and as a result, the injection angle of the high pressure gas can be appropriately adjusted. In this case, the cover 157d of the box structure 157 must be opened for access to the operation head 58b4. This structure also makes it easy to replace the nozzle bundle 158 from the spray lance.
  • FIG. 7A when the needle valve 158b is retracted into the nozzle body 158a, the gap between the outlet of the nozzle body 158a and the needle valve 158b is widened to inject the high pressure gas.
  • FIG. 7B when the needle valve 158b is advanced toward the outside of the nozzle body 158a, the gap between the outlet of the nozzle body 158a and the needle valve 158b is narrowed. The injection angle of the high pressure gas is narrowed.
  • FIG. 8 is a flowchart illustrating an operation process of the apparatus for preventing slag leakage of the present invention, which may be performed by the controller 200.
  • 9A to 9F are diagrams showing states of the high pressure gas injection lance and the converter according to the stepwise operation of the slag leakage preventing device of the present invention, respectively. As shown in FIG. 9A, before the tapping starts, the converter 100 maintains the upright position and the injection lance 150 also maintains the horizontal and retracted states.
  • step S10 a tapping start signal, which is a kind of converter information, is received from the converter control facility through the communication unit 250, and in step S20, the injection lance 150 is transferred to the converter as shown in FIGS. 9B and 9C.
  • the tip of the injection lance 150 that is, the nozzle bunch 18, is positioned at the vortex portion of the upper part of the tap hole 102 by tilting toward the entrance.
  • step S40 by injecting a high-pressure gas to the vortex portion by pushing the slag (S) suspended in the upper portion of the molten steel (M) from the vortex portion, the slag (S) flows out through the tapping hole Don't let that happen.
  • step S40 receives the converter information including the tilt angle and the degree of tapping from the converter control system in real time through the communication unit 250 while properly adjusting the inclination angle of the injection lance 150 as shown in Figure 9d and 9e. High pressure gas is injected.
  • the converter control equipment returns the converter to its original position as soon as the tapping is completed, that is, the entrance thereof faces upward.
  • step S50 it is determined whether the tapping is completed based on the converter information received from the converter control equipment. As a result of the determination in step S50, when the tapping is not completed, the process returns to step S30, whereas when the tapping is completed, the process proceeds to step S60 and the spraying lance 150 is retracted as shown in FIG. Keep the horizontal state by adjusting the angle of inclination.
  • step S70 the injection of the high pressure gas is stopped, and this step S70 may be performed before the above-described step S60.
  • the system configuration diagram of FIG. 2 is only a schematic diagram for easily explaining the present invention, and its specific configuration may be modified as much as possible.
  • the left and right inclination angle adjusting unit for adjusting the left and right inclination angle of the injection lance may be further provided, which may also be implemented using an electric motor or the like.
  • 155b cooling water inlet
  • 155c cooling water outlet
  • 158 nozzle bundle
  • 158a nozzle body
  • 210 lance inclination angle adjustment unit
  • 220 lance forward and backward drive unit
  • 230 high pressure gas injection unit
  • 240 cooling water circulation unit
  • M molten steel
  • S slag

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The present invention relates to: a device for preventing slag outflow, wherein high pressure inert gas is injected into a vortex point at the upper part of a tap hole so as to push slag from the tap hole, thereby conveniently and efficiently preventing the outflow of slag; and a high pressure gas injection lance used therein. A high pressure gas injection lance for preventing the outflow of slag according to one aspect of the present invention comprises: a pipe structure having a cylindrical body formed of two layers of an inner wall and an outer wall of which the front ends are closed, forming a high pressure gas path with the space limited by the inner wall and having a cylindrical barrier wall provided to the space between the inner wall and the outer wall at a distance from the closed front ends of the inner wall and the outer wall at the front end thereof, thereby forming a cooling water circulation path; a group of nozzles for injecting high pressure gas downward; and an adaptor for connecting the injection pipe structure and the group of nozzles so as to convert the jetting direction of the high pressure gas.

Description

슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스Slag outflow prevention device and high pressure gas injection lance used here
본 발명은 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스에 관한 것으로, 특히 고압의 불활성 가스를 출강구 상부의 소용돌이 지점에 분사하여 슬래그를 출강구로부터 밀어냄으로써 보다 간편하면서도 효율적으로 슬래그 유출을 방지할 수 있도록 한 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스에 관한 것이다.The present invention relates to a slag outflow prevention device and a high-pressure gas injection lance used in the present invention, in particular by injecting a high-pressure inert gas to the vortex point of the upper exit port to push the slag from the exit port more easily and efficiently A device for preventing slag outflow and a high pressure gas injection lance used therein.
일반적으로 용광로에서 제조된 용선을 전로(轉爐)로 옮겨 산소 취련 등의 정련 작업과 기타 합금화 처리를 행한 후 수강 대차 상에 안착된 수강 래들(ladle)로 용강을 출강하는 일관 제철소에서 뿐만 아니라 고철 등의 철원을 전기로 전로에서 아크열로 용융시켜 정련 및 합금화 처리를 행한 후 수강 래들로 용강을 출강하는 전기로업체에서는 도 1에서 도시한 바와 같이, 전로(100)로부터 수강 래들(110)로 용강(M)을 출강시키는 작업시 정련 공정에서 발생하여 용강(M)의 상부면에 비중 차이로 존재하는 슬래그(slag)(S)를 용강(M)으로부터 분리시키는 작업이 필수적이다.Generally, the molten iron manufactured in the blast furnace is transferred to the converter to perform refining operations such as oxygen scavenging and other alloying treatments, and then to the molten steel with the steel ladle seated on the steel truck. In the electric furnace company that melts the iron source of the furnace in the arc furnace in the arc heat and performs refining and alloying treatment, as shown in FIG. 1, the molten steel (from the converter 100 to the steel ladle 110) as shown in FIG. 1. It is essential to separate the slag (S) from the molten steel (M) generated in the refining process during the step of tapping M) existing in the upper surface of the molten steel (M) due to the difference in specific gravity.
즉, 전로(100)를 하방으로 경동한 상태에서 출강구(102)를 통해 용강(M)을 수강 래들(110)에 출강시키는 경우에는 정련 공정을 거친 용강(M)의 성분이 슬래그(S)에 의해 변화되지 않도록 용강(M)의 정련 작업시 발생되는, 용강(M)보다 비중이 작은 슬래그(S)가 수강 래들(110)에 혼입되지 않게 해야 한다. 결과적으로 효율적인 출강 작업의 성패는 수강 래들로 혼입되는 슬래그(S)의 양을 얼마나 최소화할 수 있는가에 달려있다.That is, when the molten steel (M) is tapped through the tapping hole 102 in the state where the converter 100 is tilted downward, the component of the molten steel (M) that has undergone the refining process is slag (S). The slag S having a specific gravity smaller than that of the molten steel M, which is generated during the refining operation of the molten steel M, is not to be mixed in the water ladle 110 so as not to be changed by the molten steel M. As a result, the success of an effective tapping operation depends on how much the amount of slag (S) incorporated into the tapping ladle can be minimized.
이를 위해 종래에는 속이 채워진 깔대기 형상의 헤드와 이러한 헤드 하부로 연장되어 출강구(102)에 삽입되는 슬리브를 갖는 슬래그 다트(120)를 다트 투입기(미도시)를 사용하여 출강구(102)에 투입함으로써 슬래그(S)가 유출되는 것을 방지하여 왔다.To this end, the slag dart 120 having a funnel-shaped head filled with the inside of the head and a sleeve extending to the lower part of the head and inserted into the tap hole 102 is introduced into the tap hole 102 using a dart injector (not shown). By doing so, the slag S has been prevented from flowing out.
한편, 종래의 슬래그 다트(120)는 비중이 대략 2.3인 슬래그와 비중이 대략 7.8인 용강의 중간 범위인 3~6의 비중을 갖는 것이 요구되는데, 슬래그 다트(120)의 비중이 적절하지 못한 경우에는 따라 슬래그 다트(120)가 너무 빨리 또는 너무 늦게 출강구(102)를 막음으로써 용강(M)이 완전히 출강되지 못하거나 또는 용강에 슬래그가 혼입되어 유출되는 문제점이 있었다.Meanwhile, the conventional slag dart 120 is required to have a specific gravity of 3 to 6, which is an intermediate range of slag having a specific gravity of about 2.3 and molten steel having a specific gravity of about 7.8, but the density of the slag dart 120 is not appropriate. As a result, the slag dart 120 prevents the molten steel M from completely tapping out too soon or too late, or the slag is mixed into the molten steel and spilled.
이외에도, 전로의 출강구(102)에서는 용강(M)이 소용돌이(vortex) 치면서 유출되기 때문에 이러한 소용돌이 지점에 슬래그 다트(120)를 정확하게 투입해야 슬래그의 유출을 효과적으로 방지할 수 있는데, 종래에는 슬래그 다트를 이러한 소용돌이 지점에 정확하게 투입하기 위해 다른 기계 장치를 사용해야 하는 등의 번거로움이 있었다.In addition, since the molten steel (M) is vortex flows out from the tap hole 102 of the converter, it is necessary to accurately input the slag dart 120 at such a vortex point to effectively prevent the outflow of slag. There was a hassle, such as the need to use different mechanisms to accurately feed these vortex points.
(특허문헌 1) 등록특허 제862819호(2008. 10. 13. 공고), 명칭 : 슬래그 다트(Patent Document 1) Registered Patent No. 882819 (announced on October 13, 2008), Name: slag dart
(특허문헌 2) 등록특허 제105834호(2011. 08. 24. 공고), 명칭 : 회수 재생된 마그네시아 크롬계 내화물을 이용한 슬래그 다트 및 그 제조방법(Patent Document 2) Registered Patent No. 105834 (August 24, 2011), Name: Slag dart using recovered and recycled magnesia chromium-based refractory material and method for producing same
본 발명은 전술한 문제점을 해결하기 위해 안출된 것으로서, 고압의 불활성 가스를 출강구 상부의 소용돌이 지점에 분사하여 슬래그를 출강구로부터 밀어냄으로써 보다 간편하면서도 효율적으로 슬래그 유출을 방지할 수 있도록 한 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스를 제공함을 목적으로 한다.The present invention has been made to solve the above-described problem, the high pressure inert gas is injected into the vortex point of the tapping outlet to push the slag from the tapping outlet slag outflow to more easily and efficiently prevent slag outflow It is an object to provide a prevention device and a high pressure gas injection lance used therein.
전술한 목적을 달성하기 위한 본 발명의 제1 특징에 따른 슬래그 유출 방지용 고압가스 분사 랜스는 선단이 폐쇄되어 있는 내벽과 외벽의 두 겹의 원통체로 이루어져서 상기 내벽으로 한정된 공간이 고압가스 경로를 형성하며, 상기 내벽과 상기 외벽 사이의 공간에는 선단이 상기 내벽과 상기 외벽의 폐쇄 선단과 이격되어 있는 원통형 격벽이 형성되어 냉각수의 순환로를 형성하는 파이프 구조체; 하방으로 고압가스를 분사하는 노즐 뭉치 및 고압가스의 분출 방향이 변환되도록 상기 분사파이프 구조체와 상기 노즐 뭉치를 연결하는 어댑터를 포함하여 이루어진다.High pressure gas injection lance for preventing slag outflow according to the first aspect of the present invention for achieving the above object is composed of a two-layered cylindrical body of the inner wall and the outer wall of which the tip is closed, the space defined by the inner wall forms a high pressure gas path And a pipe structure in which a cylindrical partition wall having a tip spaced apart from a closed tip of the inner wall and the outer wall is formed in a space between the inner wall and the outer wall to form a circulation path of cooling water; It comprises a nozzle bundle for injecting the high pressure gas downward and the adapter for connecting the injection pipe structure and the nozzle bundle so that the ejection direction of the high pressure gas is converted.
전술한 제1 특징에서, 적어도 상기 내벽 외주면 또는 상기 격벽 외주면에는 나선형 안내 돌기가 형성된 것을 특징으로 한다.In the aforementioned first feature, at least the inner wall outer circumferential surface or the partition wall outer circumferential surface is formed with a spiral guide protrusion.
상기 노즐 뭉치는 중공의 노즐 몸체와 상기 노즐 몸체 내부에 삽입되며 상기 노즐 몸체의 선단을 통해 고압가스를 고속으로 분사하는 니들 밸브를 포함하여 이루어지되, 상기 노즐 몸체는 상기 니들 밸브와 함께 확산 노즐을 형성하는 것을 특징으로 한다.The nozzle assembly is made of a hollow nozzle body and the needle body is inserted into the nozzle body and comprises a needle valve for injecting high pressure gas at high speed through the tip of the nozzle body, the nozzle body is a diffusion nozzle with the needle valve It is characterized by forming.
상기 노즐 몸체에 대해 상기 니들 밸브를 승강시키는 승강 수단을 구비하고, 상기 니들 밸브는 가운데 부위가 좁은 단면을 갖는 장구 형상으로 폐쇄된 선단부를 갖되 벽체를 관통하는 관통공이 형성된 중공의 원통체로 이루어져서 상기 승강 수단에 의해 상기 니들 밸브를 상기 노즐 몸체에서 승강시킴으로써 고압가스의 분사 각도를 조정할 수 있도록 된 것을 특징으로 한다.And elevating means for elevating the needle valve with respect to the nozzle body, wherein the needle valve is formed of a hollow cylindrical body having a through end penetrating through a wall having a closed end portion having an elongated shape having a narrow cross section at the center thereof. It is possible to adjust the injection angle of the high-pressure gas by lifting the needle valve in the nozzle body by means.
상기 어댑터는 일측이 상기 파이프 구조체와 연통되는 중공의 피팅 부재 및 하면에 상기 노즐 몸체에 형성된 수나사와 나사결합되는 암나사가 형성되어 있고 일 측면에는 상기 피팅 부재의 타측과 연통되는 연결부가 형성되어 있으며 상부는 개폐 가능한 덮개로 밀봉되어 있는 박스 구조체를 포함하여 이루어진 것을 특징으로 한다.The adapter has a hollow fitting member, one side of which is in communication with the pipe structure, and a female screw, which is screwed with a male screw formed in the nozzle body, on one side thereof, and on one side thereof, a connection portion communicating with the other side of the fitting member is formed. Is characterized in that it comprises a box structure sealed with an openable lid.
한편, 본 발명의 제2 특징에 따른 슬래그 유출 방지 장치는 전술한 특징들 중 하나의 분사 랜스; 상기 분사 랜스를 통해 고압가스를 분사하는 고압가스 분사부; 상기 분사 랜스의 경사각을 조정하는 랜스 경사각 조정부; 상기 분사 랜스를 전후진 구동하는 랜스 전후진 구동부; 상기 분사 랜스 내부로 냉각수를 순환시키는 냉각수 순환부 및 상기 고압가스 분사부, 상기 랜스 경사각 조정부, 상기 랜스 전후진 구동부 및 상기 냉각수 순환부를 총괄적으로 제어하는 제어부를 포함하여 이루어진다.On the other hand, the slag outflow prevention device according to a second aspect of the present invention includes an injection lance of one of the features described above; A high pressure gas injector for injecting high pressure gas through the injection lance; Lance inclination angle adjusting unit for adjusting the inclination angle of the injection lance; A lance forward and backward driving unit which drives the injection lance back and forth; And a control unit configured to collectively control the cooling water circulation unit for circulating the cooling water into the injection lance and the high pressure gas injection unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit, and the cooling water circulation unit.
전술한 제2 특징에서, 유/무선 통신망을 통해 전로 제어 설비로부터 출강과 관련한 전로 정보를 전달받는 통신부를 더 구비하고, 상기 제어부는 상기 통신부를 통해 전달받은 상기 전로 정보에 의거하여 상기 고압가스 분사부, 상기 랜스 경사각 조정부, 상기 랜스 전후진 구동부 및 상기 냉각수 순환부를 제어하는 것을 특징으로 한다.In the above-described second feature, the communication unit for receiving the transmission information related to the tapping from the converter control equipment via a wired / wireless communication network further comprising, the control unit based on the converter information received through the communication unit for the high-pressure gas distribution It characterized in that the control unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit and the cooling water circulation.
본 발명의 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스에 따르면, 고압의 불활성 가스를 출강구 상부의 소용돌이 지점에 분사하여 슬래그를 출강구로부터 밀어냄으로써 보다 간편하면서도 효율적으로 슬래그 유출을 방지할 수가 있다.According to the slag outflow prevention device of the present invention and the high-pressure gas injection lance used therein, by injecting a high pressure inert gas to the vortex point of the upper exit port to push the slag from the exit port more easily and efficiently to prevent slag outflow There is a number.
도 1은 종래 슬래그 유출 방지 장치의 문제점을 설명하기 위한 도.1 is a view for explaining the problem of the conventional slag leakage prevention device.
도 2는 본 발명의 슬래그 유출 방지 장치의 개념을 설명하기 위한 전체 시스템 구성도.Figure 2 is an overall system configuration for explaining the concept of the slag leakage prevention apparatus of the present invention.
도 3은 본 발명의 슬래그 유출 방지 장치의 전기적인 블록 구성도.Figure 3 is an electrical block diagram of the slag leakage prevention apparatus of the present invention.
도 4a와 도 4b는 각각 도 2에서 고압가스 분사 랜스의 종단면도와 도 4a의 A-A선 단면도.4A and 4B are longitudinal cross-sectional views of the high-pressure gas injection lance in Fig. 2, respectively, and a cross-sectional view taken along line A-A in Fig. 4A;
도 5는 본 발명의 슬래그 유출 방지 장치에서 고압가스 분사 랜스 선단부의 구조를 보인 분리 단면도.Figure 5 is an exploded cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention.
도 6은 본 발명의 슬래그 유출 방지 장치에서 고압가스 분사 랜스 선단부의 구조를 보인 결합 단면도.Figure 6 is a cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention.
도 7a 및 도 7b는 각각 도 6에서 노즐 뭉치의 니들 밸브를 상승 또는 하강시킨 상태의 단면도.7A and 7B are cross-sectional views of the needle valves of the nozzle bundles being raised or lowered in FIG. 6, respectively.
도 8은 본 발명의 슬래그 유출 방지 장치의 동작 과정을 설명하기 위한 흐름도.Figure 8 is a flow chart for explaining the operation of the slag leakage prevention apparatus of the present invention.
도 9a 내지 도 9f는 각각 본 발명의 슬래그 유출 방지 장치의 단계별 동작 과정에 따른 고압가스 분사 랜스와 전로의 상태를 보인 도.Figures 9a to 9f are respectively showing the state of the high-pressure gas injection lance and converter according to the step-by-step operation process of the slag outflow prevention device of the present invention.
이하에는 첨부한 도면을 참조하여 본 발명의 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스의 바람직한 실시예에 대해 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the slag outflow prevention device and the high-pressure gas injection lance used in the present invention.
도 2는 본 발명의 슬래그 유출 방지 장치의 개념을 설명하기 위한 전체 시스템 구성도이고, 도 3은 본 발명의 슬래그 유출 방지 장치의 전기적인 블록 구성도이다. 도 2 및 도 3에 도시한 바와 같이, 본 발명의 슬래그 유출 방지 장치는 전로의 경동시 전로의 입구를 통해 고압가스 분사 랜스(이하 간단히 '분사 랜스'라 한다)(150)를 전로(100)에 투입한 상태에서 전로 출강구(102)의 소용돌이 발생 지점에 고압가스를 분사하여 슬래그(S)를 전로 출강구(102)의 외각으로 밀어냄으로써 슬래그(S)가 출강구(102)를 통해 유출되는 것을 방지하고 있다.2 is an overall system configuration diagram for explaining the concept of the slag leakage prevention apparatus of the present invention, Figure 3 is an electrical block configuration diagram of the slag leakage prevention apparatus of the present invention. As shown in Figures 2 and 3, the slag outflow prevention device of the present invention is a high-pressure gas injection lance (hereinafter simply referred to as 'injection lance') 150 through the inlet of the converter during tilting of the converter converter 100 The slag (S) flows out through the tap hole 102 by pushing the slag (S) to the outer shell of the converter tap hole 102 by injecting a high pressure gas to the vortex generation point of the converter tap hole 102 in the state in which the It is preventing it from becoming.
이를 위해 본 발명의 슬래그 유출 방지 장치는 분사 랜스(150)와 분사 랜스(150)의 경사 각도를 조정하는 랜스 경사각 조정부(210), 전로 투입구에 대해 분사 랜스(150)를 전진 또는 후퇴시키는 랜스 전후진 구동부(220), 분사 랜스(150)를 통해 고압가스를 분사하는 고압가스 분사부(230), 분사 랜스(150)를 냉각시키기 위한 냉각수를 분사 랜스(150) 내부에서 순환시키는 냉각수 순환부(240), 유/무선 통신망에 의해 전로 제어 설비(미도시)와 통신하여 전로 제어 설비로부터 출강에 따른 각종 정보(이하 '전로 정보'라 한다), 예를 들어 전로의 경동 각도나 출강 정도 등의 정보를 실시간으로 전달받는 통신부(250) 및 전로 정보에 의거하여 랜스 경사각 조정부(210), 랜스 전후진 구동부(220), 고압가스 분사부(230) 및 냉각수 순환부(240)를 적절하게 제어하는 제어부(200)를 포함하여 이루어질 수 있다.To this end, the slag outflow prevention device of the present invention is a lance inclination angle adjustment unit 210 for adjusting the inclination angle of the injection lance 150 and the injection lance 150, before and after the lance for advancing or retracting the injection lance 150 with respect to the converter inlet. High pressure gas injection unit 230 for injecting high pressure gas through the jin drive unit 220, injection lance 150, cooling water circulating unit for circulating the cooling water for cooling the injection lance 150 ( 240), by communicating with a converter control facility (not shown) by wire / wireless communication network, various types of information (hereinafter referred to as 'transformer information') in accordance with the departure from the converter control facility; On the basis of the communication unit 250 and the converter information receiving the information in real time to properly control the lance inclination angle adjusting unit 210, lance forward and backward driving unit 220, high-pressure gas injection unit 230 and the coolant circulation unit 240 Catch control unit 200 And it may be made.
전술한 구성에서, 분사 랜스(150)는 전로(100)가 설치된 작업장의 전로(100) 주변에 설치될 수 있는데, 참조번호 130은 작업장의 천장에 설치된 고정 지지대를 나타내고, 134는 분사 랜스(150)를 이동 가능하도록 지지하는 분사랜스 지지대를 나타낸다. 예를 들어 분사랜스 지지대(134)의 후단(이하, 전로 방향을 전방으로 정의한다)은 고정 지지대(130)에서 하방으로 수직 연장된 H-빔(136)에 상하로 회동가능하도록 힌지 결합될 수 있다. 분사랜스 지지대(134)의 선단은 고정 지지대(130)에 설치된 호이스트 모터(133)에 의해 감기거나 풀리는 호이스트 와이어(132)에 의해 승강될 수 있다.In the above-described configuration, the spray lance 150 may be installed around the converter 100 of the workplace in which the converter 100 is installed, where reference numeral 130 denotes a fixed support installed on the ceiling of the workplace, and 134 denotes a spray lance 150. ) Shows a spray lance support for supporting the movable part. For example, the rear end of the injection lance support 134 (hereinafter, the forward direction is defined as forward) may be hinged up and down to the H-beam 136 vertically extending downward from the fixed support 130. have. The tip of the injection lance support 134 may be elevated by the hoist wire 132 that is wound or unwound by the hoist motor 133 installed on the fixed support 130.
결과적으로 호이스트 와이어(132)를 감으면 분사 랜스(150)의 선단이 상방을 향하는 반면에 풀면 하방을 향하게 된다. 참조번호 138은 분사 랜스(150)를 지지한 채로 분사랜스 지지대(132)에서 전후진하는 분사랜스 캐리어를 나타내고, 참조번호 139는 분사랜스 캐리어(138)를 전후진시키는 동력발생 수단, 예를 들어 모터를 나타낸다.As a result, when the hoist wire 132 is wound around, the tip of the injection lance 150 faces upward while loosened downward. Reference numeral 138 denotes an injection lance carrier moving forward and backward at the injection lance support 132 while supporting the injection lance 150, and reference numeral 139 denotes a power generating means for advancing and moving the injection lance carrier 138, for example. Represents a motor.
한편, 랜스 경사각 조정부(210)는 전술한 바와 같은 호이스트 모터(133)와 호이스트 와이어(132) 또는 유압 혹은 공압 실린더의 피스톤을 왕복 운동시키는 전기 모터와 그 부속 기구 등으로 구현될 수 있을 것인바, 필요에 따라서는 경사각을 감지하는 센서가 추가로 구비될 수 있을 것이다.On the other hand, the lance inclination angle adjusting unit 210 may be implemented as an electric motor and its accompanying mechanism for reciprocating the piston of the hoist motor 133 and the hoist wire 132 or the hydraulic or pneumatic cylinder as described above, If necessary, a sensor for detecting an inclination angle may be further provided.
랜스 전후진 구동부(220)는 분사랜스 캐리어(138)를 전후진시키기 위한 전기 모터(139)나 유압이나 공압을 압축하는 압축 펌프(모터)와 솔레노이드 밸브 또는 리니어 모터 등으로 구현될 수 있을 것인바, 전진 또는 후진 위치나 거리를 감지하는 센서가 추가로 구비될 수도 있을 것이다.The lance forward and backward driving unit 220 may be implemented as an electric motor 139 for advancing and forwarding the injection lance carrier 138 or a compression pump (motor) for compressing hydraulic or pneumatic pressure and a solenoid valve or linear motor. In addition, a sensor for detecting a forward or backward position or distance may be further provided.
고압가스 분사부(230)는, 예를 들어 아르곤(Ar)이나 질소 등의 불활성 가스를 압축하는 압축 펌프(모터)와 솔레노이드 밸브 등으로 구현될 수 있을 것이다. The high pressure gas injection unit 230 may be implemented by, for example, a compression pump (motor) and a solenoid valve that compresses an inert gas such as argon (Ar) or nitrogen.
냉각수 순환부(240)는 순환 펌프(모터)로 구현될 수 있을 것이다. 통신부(250)는 RS-232나 RS-485와 같은 직렬 통신 인터페이스 또는 이더넷과 같은 근거리 통신망으로 구현될 수 있을 것이다. 마지막으로 제어부(200)는 하드웨어 또는 소프트웨어 방식으로 구현될 수 있을 것이다.Cooling water circulation unit 240 may be implemented as a circulation pump (motor). The communication unit 250 may be implemented as a serial communication interface such as RS-232 or RS-485 or a local area network such as Ethernet. Finally, the controller 200 may be implemented in a hardware or software manner.
도 4a와 도 4b는 각각 도 2에서 고압가스 분사 랜스의 종단면도와 도 4a의 A-A선 단면도이다. 도 4에 도시한 바와 같이, 본 발명의 슬래그 유출 방지 장치에 적용되는 분사 랜스(150)는 중앙에 고압가스 경로(155a)가 형성되어 있고 선단이 폐쇄되어 있는 내외 두 겹, 즉 내벽(154)과 외벽(151)을 갖는 파이프 구조체, 하방으로 고압가스를 분사하는 노즐 뭉치(158) 및 고압가스의 분출 방향이 변환되도록 상기 분사파이프 구조체와 노즐 뭉치(158)를 연결하는 어댑터(156),(157)를 포함하여 이루어질 수 있다.4A and 4B are longitudinal cross-sectional views of the high-pressure gas injection lance in FIG. 2, respectively, and a cross-sectional view taken along line A-A in FIG. 4A. As shown in Figure 4, the injection lance 150 is applied to the slag outflow prevention device of the present invention, the inner and outer two layers, that is, the inner wall 154, the high pressure gas path 155a is formed in the center and the tip is closed. And a pipe structure having an outer wall 151, a nozzle bundle 158 for injecting high pressure gas downward, and an adapter 156 for connecting the injection pipe structure and the nozzle bundle 158 so that the ejection direction of the high pressure gas is changed, ( 157).
전술한 구성에서, 파이프 구조체의 내부에는 파이프 구조체 내부를 반분하도록 그 내벽(154)과 외벽(151) 사이의 공간에 내벽(154) 및 외벽(151)과 평행하도록 연장된 원통형 격벽(153)이 더 구비되어 있는데, 이러한 격벽(153)의 선단은 파이프 구조체의 선단으로부터 이격되어 있다. 따라서 이러한 이격 틈새로 파이프 구조체 내부를 냉각시키기 위한 냉각수가 순환, 즉 예를 들어 내벽(154)과 격벽(153) 사이의 공간으로 이루어진 냉각수 유입로(155b)로 유입된 냉각수가 이격 틈새를 통해 격벽(153)과 외벽(151) 사이의 공간으로 이루어진 냉각수 유출로(155c)로 유출됨으로써 냉각수의 순환이 이루어지게 된다. 물론 격벽(153) 외측 공간이 냉각수 유입로가 되고 내측 공간이 냉각수 유출로가 될 수도 있을 것이다.In the above-described configuration, inside the pipe structure, there is a cylindrical partition 153 extending parallel to the inner wall 154 and the outer wall 151 in the space between the inner wall 154 and the outer wall 151 so as to half the inside of the pipe structure. Further, the tip of the partition 153 is spaced apart from the tip of the pipe structure. Therefore, the cooling water for cooling the inside of the pipe structure by the separation gap is circulated, that is, the cooling water introduced into the cooling water inflow path 155b formed, for example, between the inner wall 154 and the partition wall 153, through the separation gap. The coolant is circulated by the coolant outlet path 155c formed of a space between the 153 and the outer wall 151. Of course, the space outside the partition 153 may be a coolant inflow path and the inner space may be a coolant outflow path.
한편, 냉각수 유입로(155b)를 통해 충분한 냉각수가 공급되지 않거나 분사 랜스를 기울이는 경우 등에 있어서는 냉각수가 자중에 의해 하부로 치우쳐서 분사 랜스의 내부를 고루 냉각시킬 수가 없다. 이를 방지하기 위해 냉각수 유입로(155b)와 냉각수 유출로(155c)에 각각 나선형의 안내 돌기(154a),(153a), 예를 들어 단면이 삼각형인 나선형 안내 돌기가 추가로 구비될 수 있다. 즉 파이프 구조체의 내벽(154) 외주면에는 내벽(154)과 격벽(13) 사이의 최단 거리의 대략 1/2 이상의 높이를 갖는 나선형 안내 돌기(154a)가 형성되어 있고, 격벽(153)의 외주면에도 역시 격벽(153)과 외벽(151) 사이의 최단 거리의 대략 1/2 이상의 높이를 갖는 나선형 안내 돌기(153a)가 형성되어 있다. 이러한 나선형 안내 돌기(154a),(163a)에 의해 유입되는 냉각수가 부족하거나 분사 랜스가 기울어지더라도 냉각수가 하부로 치우지는 현상을 개선할 수가 있다.On the other hand, in the case where sufficient cooling water is not supplied through the cooling water inflow path 155b, or when the injection lance is inclined, the cooling water is biased downward by its own weight so that the inside of the injection lance cannot be evenly cooled. In order to prevent this, spiral guide protrusions 154a and 153a may be additionally provided in the cooling water inflow path 155b and the cooling water outflow path 155c, for example, a triangular cross section. That is, a spiral guide protrusion 154a having a height of approximately 1/2 or more of the shortest distance between the inner wall 154 and the partition wall 13 is formed on the outer circumferential surface of the inner wall 154 of the pipe structure, and also on the outer circumferential surface of the partition wall 153. Also, a spiral guide protrusion 153a having a height of about 1/2 or more of the shortest distance between the partition wall 153 and the outer wall 151 is formed. Even if the cooling water introduced by the spiral guide protrusions 154a and 163a is insufficient or the injection lance is inclined, the cooling water may be lowered.
도 5는 본 발명의 슬래그 유출 방지 장치에서 고압가스 분사 랜스 선단부의 구조를 보인 분리 단면도이고, 도 6은 본 발명의 슬래그 유출 방지 장치에서 고압가스 분사 랜스 선단부의 구조를 보인 결합 단면도이다. 도 7a 및 도 7b는 각각 도 6에서 노즐 뭉치의 니들을 상승 또는 하강시킨 상태의 단면도이다.5 is a separated cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention, Figure 6 is a combined cross-sectional view showing the structure of the high pressure gas injection lance tip in the slag outflow prevention device of the present invention. 7A and 7B are cross-sectional views of the needles of the nozzle bundles respectively being raised or lowered in FIG. 6.
도 5 내지 도 7에 도시한 바와 같이, 본 발명의 슬래그 유출 방지 장치에서는 분사 랜스의 고압가스 경로(155a)가 수평하게 형성되어 있기 때문에 고압가스의 분사 방향을 하방으로 전환시키기 위한 방향 전환 수단이 요구된다. 도면에서 참조번호 156은 어댑터의 일부로서 박스 구조체(157)와 파이프 구조체를 연결하는 피팅 부재를 나타낸다. 이러한 피팅 부재(156)에는 횡으로 고압가스 이동로(156a)가 형성되어 있다.5 to 7, since the high pressure gas path 155a of the injection lance is formed horizontally in the slag outflow prevention device of the present invention, the direction switching means for switching the injection direction of the high pressure gas downward is provided. Required. In the drawings, reference numeral 156 denotes a fitting member connecting the box structure 157 and the pipe structure as part of the adapter. The fitting member 156 is formed with a high pressure gas flow path 156a laterally.
피팅 부재(156)의 후측에는 파이프 구조체의 고압가스 경로(155a)에 삽입되는 수평 연장부(156b)가 형성되어 있고, 이러한 수평 연장부(156b)의 선단 외주면에는 파이프 구조체의 고압가스 경로(155a)의 내주면에 형성된 암나사(미도시)와 나사결합되는 수나사(156c)가 형성되어 있으며, 전측에는 박스 구조체(157)의 일 측면에 형성된 결합용 관통공(157a)을 통해 박스 구조체(157)에 삽입된 상태로 너트(157f)와 나사 결합되는 수나사(156e)가 구비되어 있다. 도면에서 참조번호 156d는 피팅 부재(156)의 결합시 파이프 구조체의 선단과 접촉되는 플랜지를 나타내는바, 이러한 플랜지(156d)의 전면에는 고압 가스의 누출을 방지하는 O-링 용도로 작용하는, 하나 이상의 환형 돌기(156f)가 형성되어 있다. On the rear side of the fitting member 156, a horizontal extension portion 156b is formed which is inserted into the high pressure gas path 155a of the pipe structure, and the high pressure gas path 155a of the pipe structure is formed on the outer peripheral surface of the tip of the horizontal extension portion 156b. A male screw 156c is screwed to the female screw (not shown) formed on the inner circumferential surface thereof, and is formed on the box structure 157 through a coupling through hole 157a formed at one side of the box structure 157 on the front side. The male screw 156e which is screwed with the nut 157f in the inserted state is provided. In the drawings, reference numeral 156d denotes a flange that is in contact with the tip of the pipe structure when the fitting member 156 is coupled, and the front surface of the flange 156d serves as an O-ring for preventing leakage of high pressure gas. The above annular projection 156f is formed.
다음으로, 박스 구조체(157)는 일 측면에 전술한 결합용 관통공(157a)이 형성되고 하 측면에는 노즐 뭉치(158)와 연통되는 연통공(157b)이 형성되어 있는 중공의 박스 형상으로 이루어지는데, 연통공(157b)의 주벽에는 암나사(157c)가 형성되어 있다. 박스 구조체(157)의 상부에는 개방시 박스 구조체(157) 내부로의 접근을 허용하는 덮개(157d)가 형성되어 있는데, 이러한 덮개(157d)는 평상시 볼트에 의해 박스 구조체 상부를 밀폐시킨다. 참조부호 157e는 밀봉용 패킹 부재를 나타내고, 참조번호 157g는 박스 구조체(157)의 후측 벽면에 형성되어 피팅 부재(156)의 환형 돌기(156f)와 요철 결합되는 환형 요홈을 나타낸다.Next, the box structure 157 is formed in a hollow box shape in which the above-described coupling through hole 157a is formed on one side and a communication hole 157b communicating with the nozzle bunch 158 is formed on the lower side. The female screw 157c is formed on the circumferential wall of the communication hole 157b. A lid 157d is formed on the top of the box structure 157 to allow access to the inside of the box structure 157 when opened, and the cover 157d normally closes the top of the box structure by bolts. Reference numeral 157e denotes a sealing packing member, and reference numeral 157g denotes an annular groove formed on the rear wall surface of the box structure 157 to be unevenly coupled to the annular projection 156f of the fitting member 156.
다음으로, 노즐 뭉치(158)는 중공의 노즐 몸체(158a)와 노즐 몸체(158a) 내부에 삽입되며 노즐 몸체(158a)의 선단을 통해 고압가스를 고속으로 분사하는 니들 밸브(158b)를 포함하여 이루어질 수 있다. 노즐 몸체(158a)는 니들 밸브(158b)와 쌍을 이루어 작용하는 확산 노즐 형태, 즉 노즐의 중간 부위가 좁아졌다가 다시 넓어지는 형태로 구현될 수 있다. 이를 위해 노즐 몸체(158a)의 자유단(선단) 부위는 그 내부가 부채꼴 형태로 넓어지는 단면을 갖는바, 158a1은 노즐 몸체(158a)의 병목부를 나타낸다. 도면에서 참조번호 158a2는 노즐 몸체(158a)의 상단 외주면에 형성되어 박스 구조체(157)의 하면에 형성된 암나사(157c)에 나사결합하는 수나사를 나타낸다.Next, the nozzle bundle 158 is inserted into the hollow nozzle body 158a and the nozzle body 158a and includes a needle valve 158b for injecting high pressure gas at high speed through the tip of the nozzle body 158a. Can be done. The nozzle body 158a may be implemented in the form of a diffusion nozzle acting in pairs with the needle valve 158b, that is, the middle portion of the nozzle is narrowed and then widened again. To this end, the free end (tip) portion of the nozzle body 158a has a cross section in which the inside thereof is widened in a fan shape, and 158a1 represents a bottleneck of the nozzle body 158a. In the drawing, reference numeral 158a2 denotes a male screw that is formed on the upper outer circumferential surface of the nozzle body 158a and screwed to the female screw 157c formed on the lower surface of the box structure 157.
한편, 니들 밸브(158b)는 선단이 폐쇄된 중공의 원통체로 이루어지는데, 폐쇄 선단부(158b3)에 인접한 부분에는 원통체의 벽을 내외로 관통하는 하나 이상의 관통공(158b2)이 형성되어 있다. 니들 밸브(18b)의 폐쇄 선단부(158b3)는 그 가운데 부위가 가장 좁은 단면을 갖는 장구 형상으로 이루어져서 니들 밸브(158b)가 노즐 몸체(158a)에서 승강함에 따라 고압가스의 분사 각도가 넓어졌다 좁혀졌다 한다.On the other hand, the needle valve 158b is formed of a hollow cylindrical body whose tip is closed, and at least one through hole 158b2 penetrates the wall of the cylindrical body in and out of the portion adjacent to the closed tip 158b3. The closed tip portion 158b3 of the needle valve 18b has an elongated shape having a narrowest cross section at the center thereof, so that the injection angle of the high pressure gas is widened and narrowed as the needle valve 158b moves up and down the nozzle body 158a. do.
노즐 몸체(158a)의 내주면의 적소에는 암나사(158a3)가 형성되어 있고, 니들 밸브(18b)의 외주면의 대응되는 부위에는 이러한 암나사(18a3)에 나사결합되는 수나사(18b5)가 형성되어 있다. 더욱이 니들 밸브(158b)의 후단에는, 예를 들어 손이나 렌치 등의 공구에 의해 조이고 풀수 있는 조작 머리부(18b4)가 형성되어 있는바, 조작 머리부(158b4)를 좌우로 돌리는 것에 의해 니들 밸브(158b)를 노즐 몸체(158a) 내부에서 승강시킬 수가 있고, 결과적으로 고압가스의 분사 각도를 적절하게 조정할 수 있다. 이 경우에 조작 머리부(58b4)에의 접근을 위해서는 박스 구조체(157)의 덮개(157d)를 개방해야 할 것이다. 또한 이러한 구조에 의해 분사 랜스로부터 노즐 뭉치(158)를 용이하게 교체할 수 있다.A female screw 158a3 is formed in place on the inner circumferential surface of the nozzle body 158a, and a male screw 18b5 screwed to the female screw 18a3 is formed at a corresponding portion of the outer circumferential surface of the needle valve 18b. Furthermore, at the rear end of the needle valve 158b, an operation head 18b4 which can be tightened and loosened by a tool such as a hand or a wrench is formed, for example, by turning the operation head 158b4 from side to side, the needle valve 158b can be raised and lowered inside the nozzle body 158a, and as a result, the injection angle of the high pressure gas can be appropriately adjusted. In this case, the cover 157d of the box structure 157 must be opened for access to the operation head 58b4. This structure also makes it easy to replace the nozzle bundle 158 from the spray lance.
즉, 도 7a에 도시한 바와 같이 니들 밸브(158b)를 노즐 몸체(158a) 내부로 후퇴시키는 경우에는 노즐 몸체(158a)의 출구와 니들 밸브(158b) 사이의 틈새가 넓어져서 고압가스의 분사 각도가 넓어지는 반면에 도 7b에 도시한 바와 같이 니들 밸브(158b)를 노즐 몸체(158a)의 외부를 향해 전진시키는 경우에는 노즐 몸체(158a)의 출구와 니들 밸브(158b) 사이의 틈새가 좁아져서 고압가스의 분사 각도가 좁아지게 된다.That is, as shown in FIG. 7A, when the needle valve 158b is retracted into the nozzle body 158a, the gap between the outlet of the nozzle body 158a and the needle valve 158b is widened to inject the high pressure gas. On the other hand, as shown in FIG. 7B, when the needle valve 158b is advanced toward the outside of the nozzle body 158a, the gap between the outlet of the nozzle body 158a and the needle valve 158b is narrowed. The injection angle of the high pressure gas is narrowed.
도 8은 본 발명의 슬래그 유출 방지 장치의 동작 과정을 설명하기 위한 흐름도인바, 제어부(200)에 의해 수행될 수 있다. 도 9a 내지 도 9f는 각각 본 발명의 슬래그 유출 방지 장치의 단계별 동작 과정에 따른 고압가스 분사 랜스와 전로의 상태를 보인 도이다. 도 9a에 도시한 바와 같이 출강이 시작되기 전에는 전로(100)가 세워진 상태를 유지하고 분사 랜스(150)도 수평 및 후퇴 상태를 유지하게 된다.8 is a flowchart illustrating an operation process of the apparatus for preventing slag leakage of the present invention, which may be performed by the controller 200. 9A to 9F are diagrams showing states of the high pressure gas injection lance and the converter according to the stepwise operation of the slag leakage preventing device of the present invention, respectively. As shown in FIG. 9A, before the tapping starts, the converter 100 maintains the upright position and the injection lance 150 also maintains the horizontal and retracted states.
이 상태에서 출강 준비가 완료되면 전로 제어 설비에서는 도 9b에 도시한 바와 같이 전로(100)를 경동시켜서 출강을 시작하게 된다. 이러한 경동과 동시에 단계 S10에서는 통신부(250)를 통해 전로 제어 설비로부터 전로 정보의 일종인 출강 시작 신호를 전달받고, 단계 S20에서는 도 9b 및 도 9c에 도시한 바와 같이 분사 랜스(150)를 전로(100) 입구를 향해 기울이면서 전진시킴으로써 분사 랜스(150)의 선단, 즉 노즐 뭉치(18)를 출강구(102) 상부의 소용돌이 부위에 위치시킨다.In this state, when the preparation for tapping is completed, the converter control equipment starts tapping by tilting the converter 100 as shown in FIG. 9B. Simultaneously with such tilting, in step S10, a tapping start signal, which is a kind of converter information, is received from the converter control facility through the communication unit 250, and in step S20, the injection lance 150 is transferred to the converter as shown in FIGS. 9B and 9C. 100, the tip of the injection lance 150, that is, the nozzle bunch 18, is positioned at the vortex portion of the upper part of the tap hole 102 by tilting toward the entrance.
다음으로 단계 S40에서는 도 9c에 도시한 바와 같이, 소용돌이 부위에 고압가스를 분사하여 용강(M) 상부에 부유하고 있는 슬래그(S)를 소용돌이 부위로부터 밀어냄으로써 슬래그(S)가 출강구를 통해 유출되지 못하도록 한다.Next, in step S40, as shown in Figure 9c, by injecting a high-pressure gas to the vortex portion by pushing the slag (S) suspended in the upper portion of the molten steel (M) from the vortex portion, the slag (S) flows out through the tapping hole Don't let that happen.
단계 S40에서는 전로 제어 설비로부터 경동 각도나 출강 정도를 포함하는 전로 정보를 통신부(250)를 통해 실시간으로 전달받아 도 9d 및 도 9e에 도시한 바와 같이 분사 랜스(150)의 경사각을 적절하게 조정하면서 고압가스를 분사하게 된다. 다음으로 전로 제어 설비에서는 출강이 완료되는 즉시 전로를 원위치로 복귀, 즉 그 입구가 위를 향하도록 복귀시키는데, 단계 S50에서는 전로 제어 설비로부터 전달받은 전로 정보에 의거하여 출강이 완료되었는지를 판단한다. 단계 S50에서의 판단 결과, 출강이 완료되지 않은 경우에는 단계 S30으로 복귀하는 반면에 완료된 경우에는 단계 S60으로 진행하여 도 9f에 도시한 바와 같이 분사 랜스(150)를 후퇴시킴과 함께 분사 랜스150)의 경사각을 조정하여 수평 상태를 유지시킨다.In step S40 receives the converter information including the tilt angle and the degree of tapping from the converter control system in real time through the communication unit 250 while properly adjusting the inclination angle of the injection lance 150 as shown in Figure 9d and 9e. High pressure gas is injected. Next, the converter control equipment returns the converter to its original position as soon as the tapping is completed, that is, the entrance thereof faces upward. In step S50, it is determined whether the tapping is completed based on the converter information received from the converter control equipment. As a result of the determination in step S50, when the tapping is not completed, the process returns to step S30, whereas when the tapping is completed, the process proceeds to step S60 and the spraying lance 150 is retracted as shown in FIG. Keep the horizontal state by adjusting the angle of inclination.
마지막으로 단계 S70에서는 고압가스의 분사를 중지시키는데, 이 단계 S70는 전술한 단계 S60 이전에 수행될 수도 있을 것이다.Finally, in step S70, the injection of the high pressure gas is stopped, and this step S70 may be performed before the above-described step S60.
이상, 첨부한 도면을 참조하여 본 발명의 슬래그 유출 방지 장치 및 여기에 사용되는 고압가스 분사 랜스의 바람직한 실시예에 대하여 상세히 설명하였으나 이는 예시에 불과한 것이며, 본 발명의 기술적 사상의 범주 내에서 다양한 변형과 변경이 가능할 것이다. 따라서, 본 발명의 권리범위는 이하의 특허청구범위의 기재에 의하여 정해져야 할 것이다. 예를 들어, 도 2의 시스템 구성도는 단지 본 발명을 알기 쉽게 설명하기 위한 개략도로서 그 구체적인 구성은 얼마든지 변형이 가능할 것이다. 예를 들어, 분사 랜스의 좌우 경사 각도를 조정하는 랜스 좌우 경사각 조정부를 추가로 구비할 수도 있을 것인바, 이 역시 전기 모터 등을 사용하여 구현될 수 있을 것이다.As described above, the preferred embodiment of the slag outflow prevention device and the high-pressure gas injection lance used in the present invention with reference to the accompanying drawings, but this is only an example, various modifications within the scope of the technical idea of the present invention And changes will be possible. Therefore, the scope of the present invention will be defined by the description of the claims below. For example, the system configuration diagram of FIG. 2 is only a schematic diagram for easily explaining the present invention, and its specific configuration may be modified as much as possible. For example, the left and right inclination angle adjusting unit for adjusting the left and right inclination angle of the injection lance may be further provided, which may also be implemented using an electric motor or the like.
부호의 설명Explanation of the sign
100: 전로, 102: 출강구,100: converter, 102: exit,
110: 수강 래들, 120: 슬래그 다트,110: course ladle, 120: slag dart,
130: 고정 지지대, 132: 호이스트 와이어,130: fixed support, 132: hoist wire,
133: 호이스트 모터, 134: 분사랜스 지지대,133: hoist motor, 134: injection lance support,
136: H-빔, 138: 분사랜스 캐리어,136: H-beam, 138: injection lance carrier,
139: 분사랜스 전후진 모터, 150: 분사 랜스,139: injection lance forward and backward motor, 150: injection lance,
151: 외벽, 153: 격벽,151: outer wall, 153: bulkhead,
153a: 나선형 안내 돌기, 154: 내벽,153a: spiral guide protrusion, 154: inner wall,
154a: 나선형 안내 돌기, 155a: 고압가스 경로,154a: spiral guide projection, 155a: high pressure gas path,
155b: 냉각수 유입로, 155c: 냉각수 유출로,155b: cooling water inlet, 155c: cooling water outlet,
156: 피팅 부재, 157: 박스 구조체,156: fitting member, 157: box structure,
158: 노즐 뭉치, 158a: 노즐 몸체,158: nozzle bundle, 158a: nozzle body,
158b: 니들 밸브, 200: 제어부,158b: needle valve, 200: control unit,
210: 랜스 경사각 조정부, 220: 랜스 전후진 구동부,210: lance inclination angle adjustment unit, 220: lance forward and backward drive unit,
230: 고압가스 분사부, 240: 냉각수 순환부,230: high pressure gas injection unit, 240: cooling water circulation unit,
250: 통신부,250: communication unit,
M: 용강, S: 슬래그M: molten steel, S: slag

Claims (7)

  1. 선단이 폐쇄되어 있는 내벽과 외벽의 두 겹의 원통체로 이루어져서 상기 내벽으로 한정된 공간이 고압가스 경로를 형성하며, 상기 내벽과 상기 외벽 사이의 공간에는 선단이 상기 내벽과 상기 외벽의 폐쇄 선단과 이격되어 있는 원통형 격벽이 형성되어 냉각수의 순환로를 형성하는 파이프 구조체;The inner wall and outer wall of which the tip is closed are composed of two layers of cylinders, and the space defined by the inner wall forms a high-pressure gas path, and in the space between the inner wall and the outer wall, the tip is spaced apart from the closed tip of the inner wall and the outer wall. A pipe structure in which a cylindrical partition wall is formed to form a circulation path of the coolant;
    하방으로 고압가스를 분사하는 노즐 뭉치 및Nozzle bundle for injecting high pressure gas downward and
    고압가스의 분출 방향이 변환되도록 상기 분사파이프 구조체와 상기 노즐 뭉치를 연결하는 어댑터를 포함하여 이루어진 슬래그 유출 방지용 고압가스 분사 랜스.A high pressure gas injection lance for preventing slag leakage comprising an adapter for connecting the injection pipe structure and the nozzle assembly so that the direction of blowing of the high pressure gas is changed.
  2. 제 1 항에 있어서,The method of claim 1,
    적어도 상기 내벽 외주면 또는 상기 격벽 외주면에는 나선형 안내 돌기가 형성된 것을 특징으로 하는 슬래그 유출 방지용 고압가스 분사 랜스.High pressure gas injection lance for preventing slag outflow, characterized in that the spiral guide projection is formed on at least the inner wall outer peripheral surface or the partition outer peripheral surface.
  3. 제 1 항에 있어서,The method of claim 1,
    상기 노즐 뭉치는 중공의 노즐 몸체와 상기 노즐 몸체 내부에 삽입되며 상기 노즐 몸체의 선단을 통해 고압가스를 고속으로 분사하는 니들 밸브를 포함하여 이루어지되,The nozzle bundle is made of a hollow nozzle body and the inside of the nozzle body is made of a needle valve for injecting high-pressure gas at high speed through the tip of the nozzle body,
    상기 노즐 몸체는 상기 니들 밸브와 함께 확산 노즐을 형성하는 것을 특징으로 하는 슬래그 유출 방지용 고압가스 분사 랜스.The nozzle body is a high pressure gas injection lance for preventing slag outflow, characterized in that to form a diffusion nozzle together with the needle valve.
  4. 제 3 항에 있어서,The method of claim 3, wherein
    상기 노즐 몸체에 대해 상기 니들 밸브를 승강시키는 승강 수단을 구비하고,An elevating means for elevating the needle valve with respect to the nozzle body;
    상기 니들 밸브는 가운데 부위가 좁은 단면을 갖는 장구 형상으로 폐쇄된 선단부를 갖되 벽체를 관통하는 관통공이 형성된 중공의 원통체로 이루어져서 상기 승강 수단에 의해 상기 니들 밸브를 상기 노즐 몸체에서 승강시킴으로써 고압가스의 분사 각도를 조정할 수 있도록 된 것을 특징으로 하는 슬래그 유출 방지용 고압가스 분사 랜스.The needle valve is made of a hollow cylindrical body having a closed end portion in the shape of a janggu having a narrow cross section in the center portion and having a through hole penetrating a wall, thereby elevating the needle valve from the nozzle body by the elevating means to inject high pressure gas. High pressure gas injection lance for preventing slag leakage, characterized in that the angle can be adjusted.
  5. 제 3 항에 있어서,The method of claim 3, wherein
    상기 어댑터는 일측이 상기 파이프 구조체와 연통되는 중공의 피팅 부재 및The adapter is a hollow fitting member one side is in communication with the pipe structure and
    하면에 상기 노즐 몸체에 형성된 수나사와 나사결합되는 암나사가 형성되어 있고 일 측면에는 상기 피팅 부재의 타측과 연통되는 연결부가 형성되어 있으며 상부는 개폐 가능한 덮개로 밀봉되어 있는 박스 구조체를 포함하여 이루어진 것을 특징으로 하는 슬래그 유출 방지용 고압 가스 분사 랜스.A female screw threaded to a male screw formed on the nozzle body is formed on a lower surface thereof, and a connecting portion communicating with the other side of the fitting member is formed on one side thereof, and an upper portion includes a box structure sealed by an openable and open lid. High pressure gas injection lance for preventing slag spillage.
  6. 제 1 항 내지 제 5 항 중 어느 한 항의 분사 랜스;The injection lance of any one of claims 1 to 5;
    상기 분사 랜스를 통해 고압가스를 분사하는 고압가스 분사부;A high pressure gas injector for injecting high pressure gas through the injection lance;
    상기 분사 랜스의 경사각을 조정하는 랜스 경사각 조정부;Lance inclination angle adjusting unit for adjusting the inclination angle of the injection lance;
    상기 분사 랜스를 전후진 구동하는 랜스 전후진 구동부;A lance forward and backward driving unit which drives the injection lance back and forth;
    상기 분사 랜스 내부로 냉각수를 순환시키는 냉각수 순환부 및A coolant circulation unit configured to circulate the coolant into the injection lance;
    상기 고압가스 분사부, 상기 랜스 경사각 조정부, 상기 랜스 전후진 구동부 및 상기 냉각수 순환부를 총괄적으로 제어하는 제어부를 포함하여 이루어진 슬래그 유출 방지 장치.And a controller configured to collectively control the high pressure gas injection unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit, and the cooling water circulation unit.
  7. 제 6 항에 있어서,The method of claim 6,
    유/무선 통신망을 통해 전로 제어 설비로부터 출강과 관련한 전로 정보를 전달받는 통신부를 더 구비하고,It is further provided with a communication unit for receiving the transmission information related to the tapping from the converter control equipment through the wired / wireless communication network,
    상기 제어부는 상기 통신부를 통해 전달받은 상기 전로 정보에 의거하여 상기 고압가스 분사부, 상기 랜스 경사각 조정부, 상기 랜스 전후진 구동부 및 상기 냉각수 순환부를 제어하는 것을 특징으로 하는 슬래그 유출 방지 장치.And the control unit controls the high pressure gas injection unit, the lance inclination angle adjusting unit, the lance forward and backward driving unit, and the coolant circulation unit based on the converter information received through the communication unit.
PCT/KR2013/008424 2013-08-07 2013-09-17 Device for preventing slag outflow and high pressure gas injection lance used therein WO2015020261A1 (en)

Priority Applications (4)

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RU2014144902A RU2014144902A (en) 2013-08-07 2013-09-17 DEVICE FOR PREVENTION OF SLAC LEAKAGE AND A FURNACE FOR HIGH PRESSURE GAS USED IN IT
EP13883844.6A EP3031934A1 (en) 2013-08-07 2013-09-17 Device for preventing slag outflow and high pressure gas injection lance used therein
CN201380023895.4A CN104540969A (en) 2013-08-07 2013-09-17 Device for preventing slag outflow and high pressure gas injection lance used therein
JP2015531023A JP5873220B2 (en) 2013-08-07 2013-09-17 Slag outflow prevention device and its high-pressure gas injection lance

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KR10-2013-0093818 2013-08-07
KR1020130093818A KR101482510B1 (en) 2013-08-07 2013-08-07 slag out-flow prevention apparatus and high prssure gas shooting lamce therein

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KR101834958B1 (en) * 2016-12-23 2018-03-07 주식회사 포스코 Slag skimming apparatus
CN108251596B (en) * 2018-04-11 2023-08-25 北京科技大学 Fixed converter tapping hole double-nozzle structure

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EP3031934A1 (en) 2016-06-15
TWI527907B (en) 2016-04-01
TW201525148A (en) 2015-07-01
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JP5873220B2 (en) 2016-03-01
RU2014144902A (en) 2017-09-14
JP2015528067A (en) 2015-09-24

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