KR100450438B1 - sealing material found between of lower nozzle & submerged entry nozzle for continuous casting - Google Patents

sealing material found between of lower nozzle & submerged entry nozzle for continuous casting Download PDF

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Publication number
KR100450438B1
KR100450438B1 KR10-2001-0069729A KR20010069729A KR100450438B1 KR 100450438 B1 KR100450438 B1 KR 100450438B1 KR 20010069729 A KR20010069729 A KR 20010069729A KR 100450438 B1 KR100450438 B1 KR 100450438B1
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South Korea
Prior art keywords
sealing material
nozzle
tundish
heat insulating
immersion nozzle
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KR10-2001-0069729A
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Korean (ko)
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KR20030038947A (en
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이익배
이재옥
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조선내화 주식회사
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Priority to KR10-2001-0069729A priority Critical patent/KR100450438B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/502—Connection arrangements; Sealing means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings

Abstract

본 발명은 래들 또는 턴디쉬 하부에 설치되는 하부노즐과 침지노즐 사이에 형성되는 씰링재에 대해 열간상태에서 주조시 씰링재의 폭렬방지 및 압착방지 기능 향상으로 공기 혼입 현상의 억제로 강 품질 저하 억제 및 용강의 유출 현상을 억제시키 씰링재에 관한 것이다.The present invention is the sealing material formed between the lower nozzle and the immersion nozzle to be installed in the ladle or tundish lower in the hot state during the casting of the sealing material to prevent the expansion of the sealing material and to prevent the crimping of the air due to the suppression of air mixing phenomena suppression of steel quality and molten steel It relates to a sealing material to suppress the outflow phenomenon.

이에 따른 구성은 래들(Ladle) 또는 턴디쉬(Tundish)하부에 슬라이딩 플레이트(슬라이딩 게이트 노즐)가 형성되고, 그 하부에 설치되는 하부 노즐이 씰링 (Sealing)재를 경계로 하여 침지 노즐과 결속되는 것에 있어서, 상기 씰링재의 상·하 양면에 씰링재보다 우수한 단열성을 갖는 세라믹 단열재가 부착하여 일체화 됨을 특징으로 하는 씰링재에 관한 기술이다.According to this configuration, a sliding plate (sliding gate nozzle) is formed under a ladle or a tundish, and a lower nozzle installed below is bound to the immersion nozzle with a sealing material as a boundary. In the sealing material, the sealing material is characterized in that the upper and lower surfaces of the sealing material are integrated with a ceramic heat insulating material having a better heat insulating property than the sealing material.

Description

연속주조용 하부노즐과 침지노즐 사이에 설치되는 씰링재{sealing material found between of lower nozzle ＆ submerged entry nozzle for continuous casting}Sealing material installed between lower nozzle for continuous casting and immersion nozzle {sealing material found between of lower nozzle & submerged entry nozzle for continuous casting}

본 발명은 하부 노즐과 침지 노즐 사이에 설치되는 씰링(sealing)재에 관한 것으로, 보다 상세하게는 용강을 주조하는 래들 또는 턴디쉬 하부에 설치되는 하부 노즐과 침지 노즐 사이에 형성되는 씰링재에 대해 폭렬방지 및 압착방지 기능을 갖게하는데 적합한 씰링재에 관한 것이다.The present invention relates to a sealing material provided between a lower nozzle and an immersion nozzle, and more particularly, to a sealing material formed between a lower nozzle and an immersion nozzle installed under a ladle or tundish casting a molten steel. The present invention relates to a sealing material suitable for providing a prevention and crimping prevention function.

일반적으로 래들(Ladle)및 턴디쉬(Tundish)하부에는 용강의 배출 및 배출량을 제어하기 위한 슬라이딩 플레이트가 장착된다.In general, the ladle and the tundish bottom are equipped with a sliding plate for controlling the discharge and discharge of molten steel.

즉, 도 1과 같이 상부 노즐(1)과 하부 노즐(2)이 장착되고, 그들 사이에는 내화재질로 된 상부 및 하부 슬라이딩 플레이트(3),(4)( SN: Sliding Gate Nozzle이라고 함)가 설치되고,하부 노즐(2)과 침지 노즐(5)사이에는 씰링 (Sealing)재(6)를 끼워 사용한다.That is, as shown in FIG. 1, the upper nozzle 1 and the lower nozzle 2 are mounted, and between them, the upper and lower sliding plates 3 and 4 (referred to as Sliding Gate Nozzle) made of refractory materials are provided. A sealing material 6 is inserted between the lower nozzle 2 and the immersion nozzle 5 to be used.

상기 구조에서 씰링재(6)를 사용하는 것은 품질 저하 및 트러블(trouble)에 가장 영향을 미치는 인자로 공기를 들 수 있으며, 주조시 하부 노즐(2)과 침지 노즐(5)사이로 혼입되는 공기의 혼입을 방지하기 위함이다.The use of the sealing material 6 in the above structure includes air as a factor that most affects quality deterioration and trouble, and mixing of air mixed between the lower nozzle 2 and the immersion nozzle 5 during casting. This is to prevent.

일반적으로 턴디쉬 주조 후 턴디쉬 내의 잔류 스라그를 배재 하고, 냉각상태 또는 열간상태에서 슬라이딩 플레이트 내화물(SN)을 수리하거나 교환 작업하여 턴디쉬 예열을 실시 후 주조 작업을 실시하게 된다.In general, after the tundish casting, the residual slag in the tundish is excluded, and after the tundish preheating is performed by repairing or replacing the sliding plate refractory SN in a cooling state or a hot state, casting is performed.

이때 씰링재 사용 작업 방법에 있어서는 상기한 냉간상태 또는 열간상태를 불문하고 씰링재를 동일하게 적용하므로써, 주조중 씰링성 저하에 의한 공기 혼입으로 씰링재 사용 연결부에서 폭렬(puncture)에 의한 용강 유출 사고로 주조를 중단하는 사례가 빈번하게 발생 한다.At this time, in the method of using the sealing material, regardless of the cold state or the hot state described above, the sealing material is applied in the same way, so that the casting is caused by the leakage of molten steel by the puncture at the connection part of the sealing material due to air mixing due to the deterioration of the sealing property during casting. There are frequent cases of interruption.

열간 재사용 턴디쉬 사용 작업 공정은 주조 완료 후 스라그 배재 ⇒ SN 내화물 산소로 세척 ⇒ SN 내화물 교환 ⇒ 침지노즐 예열 ⇒ 침지 노즐(5)상부에 씰링재 (6) 부착 ⇒ 하부 노즐(2)과 침지 노즐(5) 조립 ⇒ 주조 위치로 이동 ⇒ 주조 작업 실시의 공정으로 이루어진다.Work process using hot reusable tundish After slaying, slag exclusion ⇒ SN refractory oxygen cleaning ⇒ SN refractory exchange ⇒ Preheating of immersion nozzle ⇒ Sealing material (6) on top of immersion nozzle (5) ⇒ Lower nozzle (2) and immersion nozzle (5) assembly ⇒ move to casting position ⇒ casting process is carried out.

상기 공정 중 씰링재 설치 작업은 예열된 침지 노즐의 상부에 열간상태하에서 냉간의 씰링재(6)를 올려놓고 하부 노즐(2)과 접착시킬때 씰링재의 폭렬과 침지노즐 세팅(Setting) 장치의 에어 실린더(Air Cylinder)방식에 의한 지속적인 압력 작용으로 인해 접합부의 씰링성 저하로 공기가 혼입되는 현상이 발생되어 강 품질 저하 및 용강이 유출되는 문제점을 안고 있다The sealing material installation during the process is carried out by placing the cold sealing material 6 in the hot state on the upper part of the preheated immersion nozzle and bonding the lower nozzle 2 to the explosion of the sealing material and the air cylinder of the immersion nozzle setting device. Due to the continuous pressure action by the Air Cylinder method, air is mixed due to the deterioration of the sealing property of the joint, which causes problems of deterioration of steel quality and leakage of molten steel.

본 발명은 상기한 종래의 문제점을 해결하기 위해 안출한 것으로, 기존 씰링재의 상하 양면에 세라믹 단열재를 부착하고, 부착된 단열재의 내·외경을 씰링재와 다르게 접촉하게 함으로써, 중간층의 씰링재에 대해 상하 노즐 연결부에서 씰링성 향상(고온에서의 기밀성 향상 등)으로 열간 사용중 폭렬방지 및 에어 실린더에 의한 압착방지로 주조 작업시 공기 침입 억제에 따라 용강의 산화방지 및 지금침투를 억제하여 우수한 강 품질을 갖게 하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned conventional problems, by attaching a ceramic insulating material on the upper and lower sides of the existing sealing material, and by contacting the inner and outer diameter of the attached insulating material differently from the sealing material, the upper and lower nozzles to the sealing material of the intermediate layer Improved sealing property (improved airtightness at high temperature, etc.) at the connection part prevents explosion during hot use and crimping by air cylinder to prevent oxidation of molten steel and suppressing penetration of the steel according to the suppression of air intrusion during casting operation, thereby providing excellent steel quality. The purpose is.

도 1은 슬라이딩 플레이트 구조의 단면도1 is a cross-sectional view of the sliding plate structure

도 2는 본 발명에 따른 씰링재 주조를 나타낸 단면도Figure 2 is a cross-sectional view showing a sealing material casting according to the present invention

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

2: 하부 노즐 5: 침지 노즐 6a: 씰링재2: lower nozzle 5: immersion nozzle 6a: sealing material

7: 세라믹 단열재7: ceramic insulation

상기한 목적을 달성하기 위한 본 발명은 래들(Ladle) 또는 턴디쉬(Tundish)하부에 슬라이딩 플레이트(슬라이딩 게이트 노즐)가 형성되고, 그 하부에 설치되는 하부 노즐이 씰링(Sealing)재를 경계로 하여 침지 노즐과 연결되는 것에 있어서, 상기 씰링재의 상·하 양면에 씰링재보다 우수한 단열 특성을 갖는 세라믹 단열재가 부착하여 일체화 됨을 특징으로 하는 씰링재에 관한 것이다.According to the present invention for achieving the above object, a sliding plate (sliding gate nozzle) is formed under a ladle or tundish, and a lower nozzle installed under the ladle is formed on the basis of a sealing material. In connection with the immersion nozzle, it relates to a sealing material, characterized in that the ceramic insulating material having a better heat insulating property than the sealing material is attached to and integrated on both the upper and lower surfaces of the sealing material.

상기한 본 발명은 씰링재용 내화재가 열간상태에서 폭렬발생 및 압착으로 인한 씰링성 저하로 공기 혼입에 의한 용강 유출 사고 등을 방지하기 위해 씰링재의 양면에 씰링재보다 용강에 대한 내용성과 고온에서의 기밀성 및 열간 용적 안정성을 갖는 이형재로서 세라믹 단열재를 부착하여 일체화 하였다.In the present invention described above, in order to prevent the accidental leakage of molten steel due to air mixing due to the deterioration of sealing properties due to the explosion and compression in the hot state of the sealing material, the contents of the sealing material on the both sides of the sealing material and the airtightness at high temperature and As a release material having hot volume stability, ceramic insulation was attached and integrated.

상기 세라믹 단열재는 하나의 예로서 (표 1)과 같은 조성을 들수 있다.상기 조성 예에서 Al2O3는 용강에 대한 내식성을 향상시키는 것으로 양이 너무 적으면 내식성 취약으로 용강유출 가능성이 있고, 너무 많으면 과다한 팽창으로 크랙(Crack)이 발생될 염려가 있으며, SiO2는 내스폴링성 향상을 위해 사용되는 것으로 사용량이 너무 적으면 과다한 팽창에 의한 크랙이 발생하고, 너무 많으면 화학적 용손성 취약으로 용손 발생의 염려가 있다.Fe2O3 ,CaO는 불가피하게 존재하는 원료로서 Al2O3및 SiO2순도가 높을수록 적게된다.당해분야에서 사용되는 씰링재는 그 종류가 다양하기 때문에 본 발명에서 는 상기 단열재에 국한하지 않고, 씰링재보다 우수한 단열성을 갖는 단열재이면 모두 적용 가능하다.The ceramic insulator may have a composition as shown in Table 1 as an example. In the composition example, Al 2 O 3 improves corrosion resistance to molten steel. If the amount is too small, the molten steel may leak due to poor corrosion resistance. If too large, cracks may occur due to excessive expansion, and SiO 2 is used to improve spalling resistance. If the amount is too small, cracks may occur due to excessive expansion. Fe 2 O 3 and CaO are inevitably present raw materials, and the higher the purity of Al 2 O 3 and SiO 2 is, the less there is. The present invention is not limited to a heat insulating material, and any heat insulating material having better heat insulating properties than a sealing material can be applied.

도 2는 본 발명에 따른 씰링재를 나타낸 것으로, 이에 도시한 바와 같이, 씰링재(6a)의 상·하 양면에 세라믹 단열재(7)를 부착하여 일체화한다.2 shows a sealing material according to the present invention. As shown in FIG. 2, the ceramic insulating material 7 is attached to both the upper and lower surfaces of the sealing material 6a to be integrated.

상기 세라믹 단열재(7)의 내경(a)은 씰링재의 내경(b)보다 약 5mm 정도 크고, 외경(c)은 씰링재의 외경(d)보다 약 5mm 정도 작게하는 것이 바람직한 것으로, 사용중 중간층의 씰링재가 노즐 상하 연결부에서 씰링성을 향상시켜 열간상태에서 내화물 씰링용으로 우수한 성능을 발휘하게 된다.The inner diameter (a) of the ceramic heat insulating material (7) is about 5mm larger than the inner diameter (b) of the sealing material, and the outer diameter (c) is preferably about 5 mm smaller than the outer diameter (d) of the sealing material. The sealing property is improved at the top and bottom of the nozzle to show excellent performance for refractory sealing in hot state.

본 발명의 세라믹 단열재는 열간상태에 있는 침지노즐 상부에 씰링재를 올려놓고 셋팅(setting)작업시 폭렬하는 현상을 방지하여 주고 적정 두께를 유지하여 줌으로서 주조작업시 지금침투를 막아주며 침지노즐 취외시 노즐로부터의 분리성을 향상시켜 준다.The ceramic insulation of the present invention puts the sealing material on the top of the immersion nozzle in the hot state and prevents the phenomenon of explosion during the setting operation and maintains the proper thickness to prevent the current penetration during casting work and when the immersion nozzle is taken out Improves separation from the nozzle.

종래의 경우 단열재를 사용하지 않은 경우는 용강유출사고가 월 평균 3∼4건 발생하였으나, 본 발명의 단열재를 현장에서 실제 적용한 결과 단 한건의 용강 유출발생도 일어나지 않았다. In the conventional case, when the insulation is not used, molten steel outflow accidents occur on average 3-4 cases per month, but as a result of actual application of the insulation of the present invention on site, only one molten steel outflow occurred.

이상에서와 같이 본 발명은 래들 또는 턴디쉬 하부에 설치되는 하부노즐과 침지노즐 사이에 끼워지는 씰링재의 상하 양면에 용강에 대한 내용성과 고온에서의 기밀성 및 열간 용적 안정성을 갖는 이형재로서 세라믹 단열재를 부착하여 일체화함으로써, 열간상태에서 주조시 씰링재의 폭렬방지 및 압착방지 기능 향상으로 공기 혼입 현상의 억제로 강품질 저하 억제 및 용강의 유출 현상을 억제시킨다.As described above, the present invention attaches the ceramic thermal insulation material as a release material having the resistance to molten steel, airtightness at high temperature, and hot volume stability on both upper and lower surfaces of the sealing material inserted between the lower nozzle and the immersion nozzle installed under the ladle or tundish. By integrating, it is possible to suppress the deterioration of steel quality and the leakage of molten steel by suppressing the air mixing phenomenon by improving the anti-explosion and compression prevention function of the sealing material during casting in the hot state.

Claims (3)

래들(Ladle) 또는 턴디쉬(Tundish)하부에 슬라이딩 플레이트(슬라이딩 게이트 노즐)가 형성되고, 그 하부에 설치되는 하부 노즐이 씰링(Sealing)재를 경계로 하여 침지 노즐과 결속되는 것에 있어서, 상기 씰링재의 상·하 양면에 씰링재보다 우수한 단열성을 갖는 세라믹 단열재가 부착하여 일체화 됨을 특징으로 하는 씰링재.A sliding plate (sliding gate nozzle) is formed under a ladle or a tundish, and a lower nozzle installed below is bound to an immersion nozzle with a sealing material as a boundary. Sealing material, characterized in that the upper and lower sides of the ceramic insulating material having a better thermal insulation than the sealing material is attached and integrated. 삭제delete 제 1항에 있어서,The method of claim 1, 세라믹 단열재의 내경(a)이 씰링재의 내경(b)보다 크고, 세라믹 단열재의 외경(c)이 씰링재의 외경(d)보다 작은 것임을 특징으로 하는 씰링재.Sealing material, characterized in that the inner diameter (a) of the ceramic heat insulating material is larger than the inner diameter (b) of the sealing material, and the outer diameter (c) of the ceramic heat insulating material is smaller than the outer diameter (d) of the sealing material.
KR10-2001-0069729A 2001-11-09 2001-11-09 sealing material found between of lower nozzle & submerged entry nozzle for continuous casting KR100450438B1 (en)

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KR10-2001-0069729A KR100450438B1 (en) 2001-11-09 2001-11-09 sealing material found between of lower nozzle & submerged entry nozzle for continuous casting

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101455352B1 (en) * 2013-04-30 2014-10-28 현대제철 주식회사 Continuous casting method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2792433A1 (en) * 2013-04-16 2014-10-22 Refractory Intellectual Property GmbH & Co. KG A sealing system preferably in a slide gate on the spout of a metallurgical vessel and a spout casing

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS57115956A (en) * 1981-01-13 1982-07-19 Daido Steel Co Ltd Production of high nitrogen steel
JPH06297117A (en) * 1993-04-19 1994-10-25 Nippon Steel Corp Mechanism and method for jointing nozzle for continuously casting metal
US5429283A (en) * 1993-06-23 1995-07-04 Didier-Werke Ag Immersion nozzle formed of separate members
JPH08117979A (en) * 1994-10-26 1996-05-14 Toshiba Ceramics Co Ltd Refractories for controlling molten steel flow rate and their sealing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57115956A (en) * 1981-01-13 1982-07-19 Daido Steel Co Ltd Production of high nitrogen steel
JPH06297117A (en) * 1993-04-19 1994-10-25 Nippon Steel Corp Mechanism and method for jointing nozzle for continuously casting metal
US5429283A (en) * 1993-06-23 1995-07-04 Didier-Werke Ag Immersion nozzle formed of separate members
JPH08117979A (en) * 1994-10-26 1996-05-14 Toshiba Ceramics Co Ltd Refractories for controlling molten steel flow rate and their sealing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101455352B1 (en) * 2013-04-30 2014-10-28 현대제철 주식회사 Continuous casting method

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