KR20030000240A - Slag out-flow prevention dart guide method - Google Patents

Slag out-flow prevention dart guide method Download PDF

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Publication number
KR20030000240A
KR20030000240A KR1020010035919A KR20010035919A KR20030000240A KR 20030000240 A KR20030000240 A KR 20030000240A KR 1020010035919 A KR1020010035919 A KR 1020010035919A KR 20010035919 A KR20010035919 A KR 20010035919A KR 20030000240 A KR20030000240 A KR 20030000240A
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South Korea
Prior art keywords
mold
round bar
dart
refractory
guide
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KR1020010035919A
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Korean (ko)
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배복순
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배복순
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Priority to KR1020010035919A priority Critical patent/KR20030000240A/en
Publication of KR20030000240A publication Critical patent/KR20030000240A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/18—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/90—Methods or apparatus for demoulding or discharging after shaping
    • 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

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

Abstract

PURPOSE: A manufacturing method of a dart guide for preventing slag outflow is provided to greatly reduce manufacture cost by inputting a round bar composing the dart guide and a refractory material kneaded with water into a mold to integrally mold the materials into a fireproof green compact, thereby forming the dart guide. CONSTITUTION: The manufacturing method of a dart guide(10) for preventing slag outflow comprises the processes of fixing the round bar thereto after positioning a round bar(12) having a diameter of 10 to 20 mm in the center of a pipe type mold having a diameter of 30 to 60 mm; inputting a paste shaped refractory composition prepared by kneading a refractory material with water into the mold so that a fireproof green compact(14) is integrally molded onto the round bar; and manufacturing a dart guide for preventing slag outflow by demolding the resulting material from the mold after curing and drying the fireproof green compact(14) integrally molded onto the round bar in the air at an ordinary temperature, wherein the method further comprises the process of applying vibration to the mold during molding so that the fireproof green compact is elaborately and evenly molded when molding the refractory composition by inputting it into the mold.

Description

슬래그 유출방지용 다트 가이드의 제조방법{Slag out-flow prevention dart guide method}Slag out-flow prevention dart guide method

본 발명은 제강공정에서 용강으로 정련하는 전로에서 전로 내의 용강을 래들로 용출시키는 일련의 출강작업시 출강구로 용강만 유출되고 취련중 발생된 슬래그(slag)가 출강구를 통하여 래들로 유출되지 못하도록 하는데 사용되는 슬래그 유출방지용 다트에 관한 것으로, 특히 다트를 구성하는 다트 가이드를 환봉에 내화재료를 불소성으로 일체화시켜 제조함으로서 제조비용을 대폭 절감할 수 있도록 하는 슬래그 유출방지용 다트 가이드의 제조방법에 관한 것이다.In the present invention, in the steelmaking process, only the molten steel is discharged to the tap and the slag generated during the drilling is not discharged to the ladle through the tap during the series of tapping work to elute the molten steel in the converter into the ladle. The present invention relates to a slag outflow preventing dart used, and more particularly, to a method of manufacturing a slag outflow prevention dart guide that significantly reduces manufacturing cost by manufacturing a dart guide constituting the dart by integrating a refractory material into a round bar with fluorine. .

일반적으로 용선을 용강으로 정련하는 전로작업 공정은 고철슈트의 고철과 용선장입 래들의 용선을 전로에 장입한 후 산소랜드를 이용하여 전로 노내에 산소를 취입하여 산화 및 탈탄 반응을 통하여 용선을 용강으로 정련하는 취련작업과 취련작업이 완료된 상태에서 전로 노내에 정련된 용강을 출강구를 통하여 래들로 유출시키는 출강작업 그리고 출강 완료후 노내에 잔류되어 있는 슬래그를 배재하는 배재작업이 이루어진다.In general, the converter work process for refining molten iron into molten steel is carried out by charging molten iron of the iron chute and the molten iron of the molten iron into the converter, and then injecting oxygen into the furnace using an oxygen land to oxidize and decarburize the molten iron into molten steel. After the refining work is completed, the tapping work is carried out to let the molten steel refined in the converter furnace into the ladle through the tapping hole, and the excavation work to exclude the slag remaining in the furnace after tapping is completed.

상기와 같은 작업공정중 출강작업시에 전로 노내의 용강이 출강구를 통하여 래들로 유출되는 출강작업중 슬래그와 용강과의 비중차를 이용하여 용강이 출강구를 통하여 유출된 후 슬래그가 출강구로 유입되려는 순간 출강구를 막아줌으로서 불순물이 래들로 유입되지 못하도록 다트를 사용하고 있다.During the tapping operation, the molten steel in the converter furnace flows into the ladle through the tapping hole, and the slag flows out through the tapping hole by using the specific gravity difference between the slag and the molten steel. Darts are used to prevent impurities from entering the ladle by blocking the instant exit.

즉, 도 1에 도시된 바와 같이 전로(100)의 노내에서 출강이 진행되는 일정한 지점에 다트(50)를 투입하는 투입기를 이용하여 출강구(110)의 상부에 다트(50)를 투입한다. 이후에 타트(50)를 구성하는 다트 가이드(52)가 출강구(110)에 꽂혀지고, 결국 출강이 완료되는 시점에 다트(50)를 구성하는 내화성헤드(54)가 출강구 (110)를 막아주게 된다. 이로 인하여 래들(120)로 슬래그가 유입되는 것을 방지하게 된다.That is, as shown in FIG. 1, the dart 50 is introduced into the upper portion of the tap hole 110 by using an injector for inserting the dart 50 at a predetermined point where tapping is performed in the furnace of the converter 100. Thereafter, the dart guide 52 constituting the tart 50 is inserted into the tap hole 110, and at the point when the tapping is completed, the fire resistant head 54 constituting the dart 50 ends the tap hole 110. Will be prevented. This prevents the slag from flowing into the ladle 120.

상기와 같이 다트(50)를 출강구(110)에 꽂혀지게 하여 내화성헤드(54)를 출강구(110)로 안내하는 종래의 다트 가이드(52)가 도 2에 도시된다.As shown in FIG. 2, a conventional dart guide 52 which guides the fire resistant head 54 to the tap hole 110 by inserting the dart 50 into the tap hole 110 as described above.

도시된 바와 같이 가압 성형하여 소성된 여러 개의 독립된 짧은 내화소성체(52a)를 환봉(52b)에 조립하고 환봉(52b)에 조립된 소성체(52a) 사이에 무기바인더 (52c)를 사용하여 접착하고 상기 환봉(52b)과 소성체(52a)가 서로 고정되어 있지 않기 때문에 환봉(52b)의 단부에 고정링(52d)을 용접하여 다트 가이드(52)를 구성하게 된다.As shown, a plurality of independent short refractory bodies 52a fired by press molding are assembled to the round bar 52b, and then bonded using an inorganic binder 52c between the fired bodies 52a assembled to the round bar 52b. Since the round bar 52b and the fired body 52a are not fixed to each other, the fixing ring 52d is welded to the end of the round bar 52b to configure the dart guide 52.

성기와 같이 구성된 다트 가이드(52)는 내화소성체(52a)가 환봉(52b)에 4-5개로 하여 약 1미터 길이로 조립하여 사용하게 되는 바, 이는 1미터 정도의 성형체를 제조하기 위해서는 대형 프레스와 같은 고가의 장비를 필요로 하고 제조에도 어려운 문제점이 있다.The dart guide 52 configured as a penis is used by assembling about 1-meter lengths of 4-5 pieces of refractory bodies 52a in the round bar 52b. There is a problem that requires expensive equipment such as presses and is difficult to manufacture.

또한 상기 내화소성체(52a)는 가압 성형된 성형체를 건조 소성하여 제조함으로서 제조공정이 복잡하고 고가의 설비를 필요로 하여 제조시간이 많이 소요된다. 특히 이렇게 제조된 내화소성체(52a)를 조립함에 있어서 각 내화소성체(52a)를 연결시키기 위한 무기바인더(52c), 조립된 내화소성체(52a)를 환봉(52b)에서 빠지지 않게 하기 위한 고정링(52d)의 용접 등이 필요하여 취급시 파손의 위험이 높고, 고온의 용강에 투입되었을 때 환봉(52b) 끝의 철재 고정링(52d)이 녹는 경우 조립된 내화소성체가 분리되어 가이드로서의 역할을 상실하게 될 위험이 있다.In addition, since the fire-resistant body 52a is manufactured by drying and firing the press-molded molded body, the manufacturing process is complicated and requires expensive equipment, which requires a lot of manufacturing time. In particular, in assembling the manufactured fire-resistant body 52a, the inorganic binder 52c for connecting each of the fire-resistant bodies 52a and the fixing for preventing the assembled fire-resistant body 52a from falling off the round bar 52b. When welding the ring 52d, etc. is required, the risk of damage during handling is high, and when the steel fixing ring 52d at the end of the round bar 52b melts when it is injected into hot molten steel, the assembled flame resistant body is separated and used as a guide. There is a risk of losing the role.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위해 창안된 것으로, 다트 가이드를 구성하는 환봉에 물과 혼련한 내화재료를 몰드에 유입 성형시켜 일체형의 내화성형체로 하여 다트가이드를 형성함으로서 소성공정이 필요 없는 불소성품으로 제조가 간단하여 제조원가를 크게 절감하여서 가격 경쟁력을 가질 수 있도록 하는 슬래그 유출방지용 다트 가이드의 제조방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the problems of the prior art as described above, by injecting the refractory material kneaded with water in the round bar constituting the dart guide into the mold to form a dart guide by forming the dart guide as an integral refractory molded body It is an object of the present invention to provide a method for manufacturing a slag outflow dart guide, which is simple to manufacture with no fluorine-free product, thereby greatly reducing the manufacturing cost and thus having a competitive price.

상기의 목적을 달성하기 위해 본 발명은,The present invention to achieve the above object,

10-20㎜의 직경을 가진 환봉을 30-60㎜의 직경을 갖는 파이프형 몰드의 중앙에 위치시키고 고정한 후, 내화재료를 물과 혼련하여 반죽 형태의 내화조성물을 상기 몰드에 유입시켜 상기 환봉에 내화성형체를 일체로 성형하고 공기중 상온에서 양생 건조시켜 몰드로부터 탈형하여 제조하는 것을 특징으로 한다.After placing and fixing a round bar having a diameter of 10-20 mm at the center of the pipe-shaped mold having a diameter of 30-60 mm, and fixing the refractory material with water, a refractory composition in the form of a dough is introduced into the mold. It is characterized in that the refractory molded body is molded integrally and cured and dried at room temperature in air to be demolded from the mold.

상기 내화조성물을 몰드에 유입하여 성형시에 내화성형체가 치밀하고 균일한 성형이 이루어지도록 상기 몰드에 진동을 가하여 성형하는 것을 특징으로 한다.The refractory composition is introduced into the mold and molded by applying vibration to the mold so that the refractory molded body is compact and uniform during molding.

도 1은 종래 슬래그 유출방지를 위한 다트의 사용예시도.1 is an exemplary view of the use of darts for preventing the conventional slag outflow.

도 2는 종래 다트의 정면도.2 is a front view of a conventional dart.

도 3은 본 발명으로 제조된 다트 가이드의 정면도.Figure 3 is a front view of the dart guide produced by the present invention.

도 4는 본 발명의 다트 가이드를 이용한 다트의 정면도.4 is a front view of the dart using the dart guide of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 다트 가이드12 : 환봉10 darts guide 12 round bar

14 : 내화성형체14: fire-resistant molded body

이하에서 본 발명의 바람직한 실시 예를 첨부된 도면에 의거 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 일체형 다트 가이드(10)가 도 3에 도시되어 있다.An integrated dart guide 10 according to the invention is shown in FIG. 3.

상기 다트 가이드(10)는 10-20㎜의 직경을 갖는 환봉(12)을 30-60㎜의 파이프형 몰드(도시생략)의 중앙으로 위치하도록 고정시킨 다음, 내화재료를 물과 혼련하여 반죽 형태로 준비한 내화조성물을 상기 몰드에 유입시켜 상기 환봉(12)에 내화성형체(14)를 일체로 성형하고 공기중 상온에서 양생, 건조시킨 후 몰드로부터 탈형시켜 제조를 완료한다.The dart guide 10 is fixed to position the round bar 12 having a diameter of 10-20mm to the center of the pipe mold (not shown) of 30-60mm, and then kneading the refractory material with water to form a dough The refractory composition prepared as described above is introduced into the mold, and the refractory molded body 14 is integrally formed on the round bar 12, cured and dried at room temperature in air, and then demolded from the mold to complete the manufacture.

상기에서 환봉(12)이 파이프형 몰드의 중심에 위치시키기 위해 몰드의 양 끝에 고정핀을 설치하는 것이 바람직하고, 몰드로 유입된 내화조성물이 몰드 밖으로흘러나오지 않도록 몰드를 밀봉 처리하는 것이 바람직하다.In order to place the round bar 12 in the center of the pipe mold, it is preferable to install fixing pins at both ends of the mold, and it is preferable to seal the mold so that the refractory composition introduced into the mold does not flow out of the mold.

또한 상기 내화조성물을 몰드에 유입하여 성형시에 몰드에 진동을 가함으로서 치밀하고 균일한 내화성형체(14)를 얻을 수 있는 것이다.In addition, the refractory composition is introduced into the mold to vibrate the mold during molding, thereby obtaining a compact and uniform refractory molded body 14.

상기와 같이 제조된 일체형 다트 가이드(10)는 상온에서 양생, 건조시킨 후 소성과정 없이 사용할 수 있는데, 이는 자체의 강도보다는 내열충격성이 크게 요구되는 다트의 사용상 특성 때문이다.The integrated dart guide 10 manufactured as described above may be used without curing after curing and drying at room temperature, which is due to the use characteristics of the dart, which requires thermal shock resistance rather than its own strength.

상기와 같이 제조된 다트 가이드(10)는 약 1600?? 이상의 용강에 예열과정 없이 직접 투입하여 약 5분 정도의 시간만 형상을 유지한 채 기능을 발휘하면 되기 때문에 자체의 강도보다는 높은 내열충격성이 요구된다. 따라서 취급상의 문제가 없을 정도의 강도만 발휘된다면 보다 기공율이 높고 치밀하지 않아 높은 내열충격성을 가지는 것이 좋다.The dart guide 10 manufactured as described above is about 1600 °. It is required to have higher thermal shock resistance than its own strength because it only needs to maintain the shape for about 5 minutes by directly injecting the molten steel without preheating. Therefore, if the strength is exerted to the extent that there is no problem in handling, it is better to have higher thermal shock resistance because the porosity is higher and not dense.

상기와 같이 제조된 다트 가이드(10)는 도 3에 도시된 바와 같이 환봉(12)에 내화성형체(14)가 일체로 형성되어 구성된다.As shown in FIG. 3, the dart guide 10 manufactured as described above is configured by forming a refractory molded body 14 integrally with the round bar 12.

상기와 같이 구성된 다트 가이드(10)는 도 4에 도시된 바와 같이 환봉(12)의 상부로 고내용성(잘 녹지 않는 성질)을 갖는 내화성헤드(54)가 삽입 고정되어 비로소 다트(20)를 구성하게 되는 것이다.As shown in FIG. 4, the dart guide 10 configured as described above is inserted into and fixed to the upper portion of the round bar 12 such that a fire resistant head 54 having high resistance (not easily melted) is inserted into the dart 20. It is to construct.

상기와 같이 구성된 다트(20)는, 내화성헤드(54)가 슬래그와 용강의 경계 면에 위치하여 용강이 모두 출강된 후 출강구를 막아 슬래그의 유출을 방지하는 역할을 하게 되고, 다트 가이드(10)가 상기 내화성헤드(54)를 출강구로 인도하는 역할과 출강구를 막는 상기 내화성헤드(54)가 분리되는 것을 방지하는 역할을 한다.In the dart 20 configured as described above, the fire resistant head 54 is positioned at the interface between the slag and the molten steel, and serves to prevent the outflow of the slag by blocking the tap hole after all the molten steel is tapped out. ) Serves to guide the fire resistant head 54 to the tap hole and prevents the fire resistant head 54 from blocking the tap.

이상에서 설명한 바와 같이 본 발명에 의한 불소성 일체형 다트 가이드는 환봉이 위치된 몰드에 내화재료를 물과 혼합한 다음 이를 몰드에 유입 성형하여 양생, 건조만으로 제조하고 이에 내화성헤드를 설치하여 사용하기 때문에 종래처럼 소성체를 환봉에 설치하기 위한 별도의 공정이 필요 없어 제조공정이 단순화되고 제조시간을 크게 단축시킬 수 있으며, 특히 본 발명에 의한 일체로 다트 가이드는 소성공정이 필요 없는 불소성품이므로 제조원가를 크게 절감할 수 있어 띄어난 가격 경쟁력을 확보할 수 있는 효과를 갖는다.As described above, the fluorine-integrated dart guide according to the present invention mixes refractory material with water in a mold in which a round bar is placed, and then flows it into a mold to prepare curing and drying, and to install and use a refractory head. There is no need for a separate process for installing a fired body in a round bar as in the prior art, which simplifies the manufacturing process and greatly shortens the manufacturing time. In particular, the integrated dart guide according to the present invention is a fluorine-free product that does not require a firing process, thereby reducing manufacturing costs. As it can be greatly reduced, it has the effect of securing outstanding price competitiveness.

Claims (2)

10-20㎜의 직경을 가진 환봉을 30-60㎜의 직경을 갖는 파이프형 몰드의 중앙에 위치시키고 고정한 후, 내화재료를 물과 혼련하여 반죽 형태의 내화조성물을 상기 몰드에 유입시켜 상기 환봉에 내화성형체를 일체로 성형하고 공기중 상온에서 양생 건조시켜 몰드로부터 탈형하여 제조하는 것을 특징으로 하는 슬래그 유출방지용 다트 가이드의 제조방법.After placing and fixing a round bar having a diameter of 10-20 mm at the center of the pipe-shaped mold having a diameter of 30-60 mm, and fixing the refractory material with water, a refractory composition in the form of a dough is introduced into the mold. A method of manufacturing a slag outflow prevention dart guide, wherein the refractory molded body is integrally formed and cured and dried at room temperature in air to be demolded from the mold. 제 1항에 있어서, 상기 내화조성물을 몰드에 유입하여 성형시에 내화성형체가 치밀하고 균일한 성형이 이루어지도록 상기 몰드에 진동을 가하여 성형하는 것을 특징으로 하는 슬래그 유출방지용 다트 가이드의 제조방법.The method of claim 1, wherein the refractory composition is introduced into a mold and molded by applying vibration to the mold so that the refractory molded body is compact and uniform during molding.
KR1020010035919A 2001-06-22 2001-06-22 Slag out-flow prevention dart guide method KR20030000240A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100732251B1 (en) * 2006-03-14 2007-07-06 삼삼환경(주) Coarse gravel sorting device
KR101441962B1 (en) * 2013-04-25 2014-09-24 포항세라믹(주) Slag dart manufacturing methods
KR20160097790A (en) 2015-02-10 2016-08-18 포항세라믹(주) The manufacturing device of the Slag dart head and this manufacturing method
KR20160126517A (en) * 2015-04-24 2016-11-02 포항세라믹(주) Stem of slag dart Molding equipment and a fixing unit of the method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993006957A1 (en) * 1991-09-28 1993-04-15 Monocon International Limited Slag retaining device
JPH116007A (en) * 1997-06-18 1999-01-12 Shinko Sogo Service Kk Refractory excellent in refractoriness and formability for converter slag cutting and dart for slag cutting using this refractory
KR20000074948A (en) * 1999-05-27 2000-12-15 이구택 A tool for preventing outflow of a slag
KR200238013Y1 (en) * 2001-04-17 2001-10-26 주식회사 대진공업 Slag dart

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993006957A1 (en) * 1991-09-28 1993-04-15 Monocon International Limited Slag retaining device
JPH116007A (en) * 1997-06-18 1999-01-12 Shinko Sogo Service Kk Refractory excellent in refractoriness and formability for converter slag cutting and dart for slag cutting using this refractory
KR20000074948A (en) * 1999-05-27 2000-12-15 이구택 A tool for preventing outflow of a slag
KR200238013Y1 (en) * 2001-04-17 2001-10-26 주식회사 대진공업 Slag dart

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100732251B1 (en) * 2006-03-14 2007-07-06 삼삼환경(주) Coarse gravel sorting device
KR101441962B1 (en) * 2013-04-25 2014-09-24 포항세라믹(주) Slag dart manufacturing methods
KR20160097790A (en) 2015-02-10 2016-08-18 포항세라믹(주) The manufacturing device of the Slag dart head and this manufacturing method
KR20160126517A (en) * 2015-04-24 2016-11-02 포항세라믹(주) Stem of slag dart Molding equipment and a fixing unit of the method

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