KR20030031239A - A flug for anti-leak of converter slag - Google Patents

A flug for anti-leak of converter slag Download PDF

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Publication number
KR20030031239A
KR20030031239A KR1020010063030A KR20010063030A KR20030031239A KR 20030031239 A KR20030031239 A KR 20030031239A KR 1020010063030 A KR1020010063030 A KR 1020010063030A KR 20010063030 A KR20010063030 A KR 20010063030A KR 20030031239 A KR20030031239 A KR 20030031239A
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KR
South Korea
Prior art keywords
molten steel
slag
plug
converter
hole
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KR1020010063030A
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Korean (ko)
Inventor
구본호
방영록
안동석
김정규
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주식회사 포스코
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Priority to KR1020010063030A priority Critical patent/KR20030031239A/en
Publication of KR20030031239A publication Critical patent/KR20030031239A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

PURPOSE: A plug for preventing outflow of converter slag is provided to prevent slag on the upper part of molten steel from overflow to the ladle along with molten steel in the process of injecting molten steel inside converter for steelmaking into a ladle. CONSTITUTION: In a plug(11) for preventing outflow of converter slag so that molten steel and slag on the upper part of molten steel are prevented from overflow into the ladle while molten steel in converter is being tapped into a ladle through tapping hole, the plug(11) for preventing outflow of converter slag comprises a plug main body(5) into the central part of the inner surface of which a through hole is penetrated in a top shape, and to the lower part of the through hole of which a female grooved part is connected; a bar member(6) connected to the female grooved part of the plug main body through the through hole by a pin(10), wherein the bar member(6) comprises a bar(6-1) having certain diameter and length, and a holder(6-2) connected to the front end part of the bar.

Description

전로 슬래그 유출방지용 플러그{A flug for anti-leak of converter slag}Converter slag leakage preventing plug {A flug for anti-leak of converter slag}

본 발명은 전로 슬래그 유출방지용 플러그에 관한 것으로, 특히 제강용 전로내의 용강을 래들에 투입하는 과정에서 상기 용강 상부의 슬래그가 용강과 함께 상기 래들로 혼입되는 것을 방지할 수 있도록 한 전로 슬래그 유출방지용 플러그에 관한 것이다.The present invention relates to a converter slag outflow prevention plug, and in particular, a converter slag outflow prevention plug which prevents the slag of the upper part of the molten steel from being mixed into the ladle together with the molten steel in the process of injecting molten steel in the steelmaking converter into the ladle. It is about.

일반적으로 전로(converter)는 산소, 공기, 혹은 가스를 노에 들어 있는 선철 용탕속 또는 표면에 불어 넣음으로써 불순 원소를 산화연소시켜서 제거하고, 그 열을 이용하면서 정련을 행하는 식의 노를 말한다.In general, a converter is a furnace in which oxygen, air, or gas are blown into a molten iron or surface in a furnace to oxidize and remove impurities, and then refine using the heat.

이러한 전로의 취련 종료 후, 래들로 용강을 출강하는 과정에서 노내반응의 부산물로 생성된 슬래그가 불가피하게 용강에 혼입될 경우 용강을 재산화시켜 강의 청정성을 약화시키는 등 용강 품질에 악영향을 미치므로 상기 슬래그의 유출을 방지할 필요가 있다.After slag termination of the converter, when slag generated as a by-product of the furnace reaction is inevitably mixed in the molten steel in the process of tapping the molten steel with ladle, the molten steel is recrystallized, thus adversely affecting the quality of the molten steel. It is necessary to prevent the outflow of slag.

종래 전로내 슬래그의 유출을 방지하기 위한 기술로서 소개된 것으로서 슬래그 체크볼(check ball)(도시되지 않음)이 있는 바, 이는 그 내부에 철이 내장되고, 외부는 내화 재질로 형성된 원형의 볼 형상을 가지며 전로내에 투입 후 출강구 상부에 위치하지 못하고 노내에서 떠돌아 다니다가 출강이 완료되는 싯점에 용강의 와류 현상에 의해 출강구쪽으로 이동되므로 출강구 폐쇄 적중율이 불량한 문제점이 있다.It is introduced as a technique for preventing the outflow of slag in the conventional converter, there is a slag check ball (not shown), which is embedded in the iron, the outside is a circular ball shape formed of a refractory material It is not located in the upper part of the exit after being put into the converter and floats in the furnace, but moves to the exit by the vortex phenomenon of the molten steel at the time of the completion of the exit, so the hitting ratio of the exit closure is poor.

또한, 상기 출강구로 용강이 유출되는 과정에서 소용돌이(vortex) 현상이 발생하여 슬래그가 용강과 함께 유출되는 바, 종래 슬래그 체크볼은 전술한 바와 같이 출강구 폐쇄율이 저조하여 슬래그 유출 방지 효과가 적게 되어 제품(용강) 품질을 저하시키는 문제점이 있다.In addition, in the process of the molten steel flows out into the tap hole vortex occurs and the slag flows out with the molten steel bar, the slag check ball is a conventional slag check ball has a low tap closure rate as described above is less effective to prevent slag outflow There is a problem that lowers the product (molten steel) quality.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 전로내의 용강을 래들내에 투입하는 과정에서 상기 전로의 출강구에 상시 위치하여 슬래그의 유출 및 용강의 소용돌이 현상을 사전에 방지함으로써 용강의 품질을 높일 수 있는 전로 슬래그 유출방지용 플러그를 제공하는 데 그 목적이 있다.The present invention has been made in order to solve the above problems of the prior art, the molten steel by always placed in the exit of the converter in the process of injecting the molten steel in the converter into the ladle to prevent the outflow of slag and swirling of the molten steel in advance The purpose of the present invention is to provide a converter slag leakage preventing plug that can improve the quality of the furnace.

도 1은 본 발명의 전로 슬래그 유출방지용 플러그를 도시한 정면도.1 is a front view showing a converter slag leakage prevention plug of the present invention.

도 2a는 본 발명의 전로 슬래그 유출방지용 플러그의 분해 사시도.Figure 2a is an exploded perspective view of the converter slag leakage prevention plug of the present invention.

도 2b는 본 발명의 전로 슬래그 유출방지용 플러그에 있어서의 플로그 본체의 평면도.Fig. 2B is a plan view of the plug body in the converter slag leakage preventing plug of the present invention.

도 3은 본 발명의 전로 슬래그 유출방지용 플러그의 사용상태를 도시한 측면도.Figure 3 is a side view showing the use state of the converter slag leakage prevention plug of the present invention.

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1 : 전로 2 : 출강구1: converter 2: exit

3 : 용강 4 : 슬래그3: molten steel 4: slag

5 : 플러그 본체 6 : 바(bar)부재5: plug body 6: bar member

6-1 : 바 6-2 : 걸이대6-1: Bar 6-2: Hanger

9 : 요홈부 10 : 핀9 groove 10: pin

상기한 과제를 실현하기 위한 본 발명에 따른 전로 슬래그 유출방지용 플러그는 전로내의 용강을 출강구를 통해 래들로 출강하는 과정에서 상기 용강과 용강 상부의 슬래그가 상기 래들로 함께 혼입되는 것을 방지하기 위한 슬래그 유출방지용 플러그에 있어서, 팽이 형상으로서 내면 중앙부에 관통공이 통공되고 상기 관통공 하부에 요홈부가 연통된 플러그 본체; 상기 플러그 본체의 요홈부와 관통공을 통해 핀결합된 바부재; 를 포함하여 구성되는 것을 특징으로 한다.Slag for preventing the converter slag outflow according to the present invention for realizing the above object is a slag for preventing the slag of the molten steel and the upper portion of the molten steel is mixed with the ladle in the process of tapping the molten steel in the converter through the ladle through the tap. A plug for preventing a leak, comprising: a plug body having a top shape having a through hole through a central portion of the inner surface thereof and a recessed portion communicating with a lower portion of the through hole; A bar member pin-coupled through a recess and a through hole of the plug body; Characterized in that comprises a.

이러한 본 발명에서 상기 바부재는 소정 직경과 길이를 갖는 바와, 상기 바의 선단부에 연결된 걸이대를 포함하는 것을 특징으로 한다.In the present invention, the bar member has a predetermined diameter and length bar, characterized in that it comprises a hook connected to the front end of the bar.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 전로 슬래그 유출방지용 플러그를 도시한 정면도이고, 도 2a는 본 발명의 전로 슬래그 유출방지용 플러그의 분해 사시도이며, 도 2b는 본 발명의 전로 슬래그 유출방지용 플러그에 있어서의 플로그 본체의 평면도이다.1 is a front view showing a converter slag leakage preventing plug of the present invention, Figure 2a is an exploded perspective view of the converter slag leakage preventing plug of the present invention, Figure 2b is a plug main body of the converter slag leakage preventing plug of the present invention. Top view.

또한, 도 3은 본 발명의 전로 슬래그 유출방지용 플러그의 사용상태를 도시한 측면도로서 이에 따른 전로 슬래그 유출방지용 플러그(11)는 크게 플러그 본체와, 상기 플러그 본체에 결합된 바부재로 이루어져 있다.In addition, Figure 3 is a side view showing the use state of the converter slag leakage prevention plug of the present invention, the converter slag leakage prevention plug 11 according to this largely consists of a plug body and a bar member coupled to the plug body.

도 1 내지 도 2b에 도시된 바와 같이, 상기 플러그 본체(5)는 정면에서 보아 대략 팽이 형상으로서 내면 중앙부에 소정 직경의 관통공(8)이 통공되고 상기 관통공(8) 하부에 대략 'ㄷ'자 형상의 단면을 갖는 요홈부(9)가 연통되어 있다.As shown in FIGS. 1 to 2B, the plug main body 5 has a top shape substantially in the shape of a top, and has a through hole 8 having a predetermined diameter in the center of the inner surface thereof, and is roughly formed under the through hole 8. The groove 9 having a 'shaped cross section' is in communication.

상기 플러그 본체(5)의 재료로서는 제강 공정에서 발생하는 부산물인 제강슬래그와, RH설비 보수재로 사용후 발생하는 폐내화재를 사용하되, 비중 조절을 위해 Cr-filler나 분철인 Chip을 첨가하고, 결합을 강화시켜주기 위해 알루미나 시멘트, 인산 알루미늄, Hot fiver, Fly ash, 비닐 Fiber등을 배합하여 팽이 형상으로 성형한다.As the material of the plug main body 5, steelmaking slag, which is a by-product generated in the steelmaking process, and waste refractories generated after use as a repair material for RH facilities are used, but a Cr-filler or a powdered iron chip is added to adjust specific gravity, Alumina cement, aluminum phosphate, hot fiver, fly ash, vinyl fiber, etc. are mixed to form a top shape to strengthen the structure.

상기 제강 슬래그는 CaO 44%, SiO211%, T.Fe 22%, MgO 8%, MnO 3%, P2O53%, Al2O32% 의 성분을 가지며, 상기 폐내화재는 MgO 77%이상, CaO 10% 이하의 성분으로서 100 ㎏/㎤ 이상의 압축강도를 가진다.The steelmaking slag has a component of 44% CaO, 11% SiO 2 , 22% T.Fe, 8% MgO, 3% MnO, 3% P 2 O 5 , 2% Al 2 O 3 , and the waste refractories are MgO It has a compressive strength of 100 kg / cm 3 or more as a component of 77% or more and CaO 10% or less.

상기 바(bar)부재(6)는 소정 직경과 길이를 갖는 바(bar)(6-1)의 선단부에 내면에 사각 형상의 개구를 갖는 즉, 액자틀 형상의 걸이대(6-2)가 연결되어 있고, 상기 바부재(6)는 상기 플러그 본체(5)의 요홈부(9)와 관통공(8)을 통해 걸이대(6-2)의 일부가 상기 플러그 본체(5)의 외부로 돌출된 후, 링 형상을 갖는 핀(10)에 의해 결합되어진다.The bar member 6 has a square-shaped opening on the inner surface of the bar 6-1 having a predetermined diameter and length, that is, a frame-shaped hanger 6-2 is connected to the bar member 6. The bar member 6 has a part of the hanger 6-2 protruding out of the plug body 5 through the recess 9 and the through hole 8 of the plug body 5. , By a pin 10 having a ring shape.

상기 걸이대(6-2)와 핀(10)과의 결합은 걸이대(6-2)의 일단부와 핀(10)의 내주면에 각각 나사산(미도시)을 형성한 후 결합시키거나 또는 핀(10)을 상기 걸이대(6-2)의 외주면 직경보다 약간 크게 하여 억지끼움 방식에 의해 결합시킬 수도 있다.The hanger 6-2 and the pin 10 are coupled to each other by forming a thread (not shown) on one end of the hanger 6-2 and the inner circumferential surface of the pin 10, respectively, or pin 10 ) May be slightly larger than the diameter of the outer circumferential surface of the hanger 6-2, and may be joined by an interference fit method.

상기와 같이 구성되는 본 실시예에 따른 전로 슬래그 유출방지용 플러그의 작용을 설명하면 다음과 같다.Referring to the operation of the converter slag leakage prevention plug according to the present embodiment configured as described above are as follows.

도 3에 도시된 바와 같이, 전로(1)내의 용강(3)을 출강구(2)를 통해 래들(미도시)로 출강하는 과정에서 본 발명의 전로 슬래그 유출방지용 플러그(11)의 걸이대(6-2)에 적당한 도구 즉, 투입기(20)를 걸어서 상기 전로(1)의 입구를 통해 그 상부에 슬래그(4)가 형성된 용강(3)을 거쳐 상기 출강구(2) 상부에 투입한다.As shown in FIG. 3, the hanger 6 of the converter slag leakage preventing plug 11 of the present invention is in the process of tapping the molten steel 3 in the converter 1 through a tap hole 2 into a ladle (not shown). A suitable tool, ie, a feeder 20, is placed in the upper part of the tap-hole 2 through a molten steel 3 having a slag 4 formed thereon through an inlet of the converter 1.

이때, 상기 플러그(11)는 그 재질상 용강(3)내에서 약 2~3분간 용손되지 않는 상태에서 상기 바(6-1)는 출강구(2) 내부에 삽입된 상태에서 그 상부에 연결된 플러그 본체(5)의 유동을 방지하고, 상기 플러그 본체는 출강구(2) 상부에 놓여진 상태에서 상기 출강구(2) 상부에서의 용강(3)의 소용돌이(vortex) 현상을 방지함으로써, 상기 용강(3)과 용강 상부의 슬래그(4)가 상기 래들로 함께 혼입되는 것을 방지하게 된다.At this time, the plug 11 is connected to the upper portion of the plug 6-1 in the state in which the molten steel 3 is not melted in the molten steel 3 for about 2 to 3 minutes while being inserted into the tap hole 2. The flow of the plug body 5 is prevented, and the plug body is prevented from vortex of the molten steel 3 in the upper part of the tap hole 2 while the plug body is placed on the tap hole 2. 3 and the slag 4 on the upper part of the molten steel are prevented from mixing together with the ladle.

상기한 바와 같은 본 발명의 전로 슬래그 유출방지용 플러그는 제강공정에서 발생되는 부산물을 재활용하여 전로의 출강 작업 도중 상기 전로내의 용강과 함께 슬래그가 래들내에 투입되는 것을 방지함으로써 제조 원가 절감과 함께 환경 오염 을 방지하고, 용강의 품질을 향상시키는 효과가 있다.The converter slag leakage preventing plug of the present invention as described above by recycling the by-products generated in the steelmaking process to prevent the slag is introduced into the ladle together with the molten steel in the converter during the tapping operation of the converter by reducing the production cost and environmental pollution It is effective in preventing and improving the quality of molten steel.

Claims (2)

전로내의 용강을 출강구를 통해 래들로 출강하는 과정에서 상기 용강과 용강 상부의 슬래그가 상기 래들로 함께 혼입되는 것을 방지하기 위한 슬래그 유출방지용 플러그에 있어서,In the slag outflow plug for preventing the slag of the molten steel and the upper portion of the molten steel is mixed together with the ladle in the process of tapping the molten steel in the converter through the tapping hole, 팽이 형상으로서 내면 중앙부에 관통공이 통공되고 상기 관통공 하부에 요홈부가 연통된 플러그 본체;A plug body having a top shape having a through hole through a central portion of the inner surface thereof, and a recessed portion communicating with a lower portion of the through hole; 상기 플러그 본체의 요홈부와 관통공을 통해 핀결합된 바부재; 를 포함하여 구성되는 것을 특징으로 하는 슬래그 유출방지용 플러그.A bar member pin-coupled through a recess and a through hole of the plug body; Slag leakage prevention plug, characterized in that comprising a. 제 1항에 있어서,The method of claim 1, 상기 바부재는 소정 직경과 길이를 갖는 바와, 상기 바의 선단부에 연결된 걸이대를 포함하는 것을 특징으로 하는 슬래그 유출방지용 플러그.The bar member is a bar having a predetermined diameter and length, the slag outflow plug, characterized in that it comprises a hook connected to the front end of the bar.
KR1020010063030A 2001-10-12 2001-10-12 A flug for anti-leak of converter slag KR20030031239A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112359166A (en) * 2020-12-03 2021-02-12 马鞍山瑞恒精密制造有限公司 Confined space converter pushing off slag device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241116A (en) * 1998-02-27 1999-09-07 Sumitomo Metal Ind Ltd Stopper for slag-cutting and converter provided with same
JP2000160225A (en) * 1998-11-20 2000-06-13 Fujikoo:Kk Tool for holding and closing slag
KR20000055654A (en) * 1999-02-09 2000-09-15 손성은 Slag dart for preventing slag overflow in steelmaking furance
KR20000055653A (en) * 1999-02-09 2000-09-15 손성은 Manipulating apparatus of slag dart arranged at the outlet of steelmaking furnace
WO2001059383A1 (en) * 2000-02-08 2001-08-16 Goricon Metallurgical Services Limited Plug members for steel furnaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11241116A (en) * 1998-02-27 1999-09-07 Sumitomo Metal Ind Ltd Stopper for slag-cutting and converter provided with same
JP2000160225A (en) * 1998-11-20 2000-06-13 Fujikoo:Kk Tool for holding and closing slag
KR20000055654A (en) * 1999-02-09 2000-09-15 손성은 Slag dart for preventing slag overflow in steelmaking furance
KR20000055653A (en) * 1999-02-09 2000-09-15 손성은 Manipulating apparatus of slag dart arranged at the outlet of steelmaking furnace
WO2001059383A1 (en) * 2000-02-08 2001-08-16 Goricon Metallurgical Services Limited Plug members for steel furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112359166A (en) * 2020-12-03 2021-02-12 马鞍山瑞恒精密制造有限公司 Confined space converter pushing off slag device

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