KR20000039372A - Refractory composition for side dam of strip casting apparatus - Google Patents

Refractory composition for side dam of strip casting apparatus Download PDF

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KR20000039372A
KR20000039372A KR1019980054691A KR19980054691A KR20000039372A KR 20000039372 A KR20000039372 A KR 20000039372A KR 1019980054691 A KR1019980054691 A KR 1019980054691A KR 19980054691 A KR19980054691 A KR 19980054691A KR 20000039372 A KR20000039372 A KR 20000039372A
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alumina
refractory composition
refractory
casting apparatus
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KR1019980054691A
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KR100395112B1 (en
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이철규
정한남
추동균
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이구택
포항종합제철 주식회사
신현준
재단법인 포항산업과학연구원
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302—Water reducers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)

Abstract

PURPOSE: A refractory composition is provided, which is used in the side dam of a strip casting apparatus and is improved in the strength and the durability. CONSTITUTION: A refractory composition comprises 5 wt% or less of silimanite; 53-57 wt% of alumina clinker; 25-30 wt% of fire extinguishing-resistant calcia clinker; 4-9 wt% of graphite powder; 2 wt% or less of stainless steel fiber; 5-8 wt% of alumina cement being a binding material; and 1 wt% or less of naphthalene sodium sulfonate and/or calcium hydroxide.

Description

스트립 캐스팅 주조장치의 사이드댐용 내화조성물Refractory Composition for Side Dam of Strip Casting Casting Equipment

본 발명은 두 개의 롤을 이용한 스트립 캐스팅장치에 있어서 롤 양끝 부위를 막아주는 사이드댐중 롤과 접촉이 없고 용강과 접촉하는 베이스 내화물에 관한 것이다.The present invention relates to a base refractories in contact with molten steel without contacting the rolls of the side dams that block both ends of the rolls in a strip casting apparatus using two rolls.

일반적으로 트윈롤(twin-roll) 식 스트립 캐스팅 장치를 사용한 연속주조공정에 있어서는 도 1에 나타낸 바와같이 회전하는 두 개의 냉각롤(1)(2)의 양단면에 접하게 되는 사이드댐(3)에 의해 형성된 이동주형 내에 용강풀(pool)(4)을 만들면서 냉각롤의 냉각에 의하여 용강의 응고가 일어나며 두 개의 롤 간격 사이로 스트립을 형성하게 된다.In general, in the continuous casting process using a twin-roll strip casting apparatus, as shown in FIG. 1, the side dams 3 which come into contact with both end faces of two cooling rolls 1 and 2 that rotate. The molten steel is solidified by the cooling of the cooling roll while forming the molten steel pool 4 in the movable mold formed by the molten steel, thereby forming a strip between two roll gaps.

이러한 공정에 소요되는 사이드댐용 내화물은 예열중 산화, 변형이 없어야 하며, 급속가열에 견디어야 할 뿐만 아니라 주조시간 동안 강의 청정도 유지를 위하여 용강과 반응이 적어야 하고, 구동되는 두 개의 롤 사이에서 응고되어 압착되는 위치에서 받게되는 압축응력을 지탱하여야 하며, 정밀한 장치에 설치되어야 하기 때문에 표면과 외관이 미려하여야 하는 특성을 지녀야 한다.Refractories for side dams required for this process must be free from oxidation and deformation during preheating, must not only withstand rapid heating, but also must be less reactive with molten steel to maintain steel cleanliness during casting time, and solidify between the two rolls driven. It must be able to support the compressive stress received in the compressed position and must be installed in a precise device so that the surface and appearance must be beautiful.

종래에 사이드댐용 내화물로써는 열충격저항성이 우수하며 구조적으로 안정하고 단시간 동안에는 용강과 반응이 거의 없는 용융실리카 소결체가 베이스 재질로 주로 사용되어 왔으나, 고온에서 소성한 실리카질 내화물은 장시간 동안 용강과 접촉시 화학적으로 불안정하며, 재질이 강하여 표면을 미려하게 관리하는데에 어려움이 많으며, 제조가격이 비싼 단점이 있다.Conventionally, as a refractory for side dams, a molten silica sintered body which has excellent thermal shock resistance, is structurally stable, and hardly reacts with molten steel has been mainly used as a base material. It is unstable, and the material is strong, it is difficult to manage the surface beautifully, there is a disadvantage that the manufacturing price is expensive.

이러한 실리카의 단점을 보완하여 알루미나계 소결체를 사이드 댐의 베이스 재질로 적용하기도 하였으나, 알루미나 소결체는 실리카보다 화학적으로는 안정하지만 열충격에 약하고 스컬(skull)의 발생이 심하며, 난가공성 재질이어서 사용에 큰 제한을 받고 있다.Although the alumina-based sintered body was applied to the side dam base material to compensate for the disadvantage of silica, the alumina sintered body was chemically more stable than silica, but weak in thermal shock, severely generated scull, and difficult to use because it is difficult to use. It is restricted.

따라서, 최근에는 이러한 화학적, 기계적, 열적, 가격적 단점을 보완한 알루미나계 부정형 혹은 불소성 내화물이 사이드댐용 베이스 내화물로 개발중에 있는 추세이다.Therefore, in recent years, alumina-based amorphous or fluorinated refractory materials, which are supplemented with such chemical, mechanical, thermal and cost disadvantages, are being developed as a base refractory for side dams.

그 대표적인 예로 일본의 특개평 7-68353호를 들 수 있으나, 여기서 보이는 재질은 카본의 함유량이 높아 사용중 주위환경과 예열중 산화등 여러 가지 제약을 받게 되었으며 알루미나 성분이 높아 용강의 청정도 측면에서 개선의 여지를 지니고 있다.A typical example is Japanese Patent Application Laid-open No. Hei 7-68353. However, the material shown here is high in carbon and is subject to various restrictions such as ambient environment and preheating during use, and its high alumina content improves the cleanliness of molten steel. Has room.

이에 본 발명자들은 보다 물성이 우수한 사이드댐용 내화물을 얻기 위해 연구와 실험을 거듭하고 그 결과에 근거하여 본 발명을 제안하게 된 것으로, 본 발명은 화학적·열적 안정성이 우수한 알루미나, 내화성과 용강의 청정도 향상에 우수한 칼시아클린커, 파괴인성과 열충격 저항성을 향상시키는 흑연분말과 스틸섬유, 및 고성능 감수제와 알루미나시멘트를 적정량으로 포함시켜 내화물을 구성함으로서, 고강도 고내구성의 사이드댐용 부정형 내화물을 제공하고자 하는데, 그 목적이 있다.Accordingly, the present inventors have repeatedly studied and experimented to obtain a refractory for side dams having excellent physical properties, and proposed the present invention based on the results, and the present invention provides excellent alumina, fire resistance and cleanliness of molten steel with excellent chemical and thermal stability. It is intended to provide a high-strength, high-durability, amorphous refractory for side dams by forming a refractory containing an appropriate amount of calcia clinker, graphite powder and steel fiber, which improves fracture toughness and thermal shock resistance, and a high performance water-reducing agent and alumina cement. , Its purpose is.

도 1(a)는 스트립 캐스터에 있어서 롤과 사이드댐의 배치를 보이는 개략도Figure 1 (a) is a schematic diagram showing the arrangement of the roll and side dam in the strip caster

(b)는 사이드 댐의 부분 정면도(b) is a partial front view of the side dam

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1,2 ... 냉각롤(roll) 3 ..... 사이드 댐 내화물1,2 ... cooling roll 3 ..... side dam refractory

4 ..... 용탕이 머무는 풀(pool) 5 ..... 용탕접촉부(베이스 재질)4 ..... Pool where molten metal stays 5 ..... Melt contact part (base material)

6 ..... 롤 접촉부 7 ..... 금속케이스6 ..... Roll Contact 7 ..... Metal Case

8 ..... 응고주편의 압착점8 ..... Crimping point of solidification cast

상기 목적을 달성하기 위한 본 발명은 두 개의 냉각롤의 양단면에 접하는 금속박판 연속주조장치의 사이드댐에 있어 용탕과 접촉하는 부분에 사용되는 부정형 내화조성물에 있어서, 실리마나이트:5중량%이하, 알루미나 클린커:53-57중량%, 내소화성 칼시아 클린커:25-30중량%, 흑연분말:4-9중량%, 스테인레스강섬유:2중량%이하로 구성되고, 여기에 결합재로 알루미나시멘트:5-8중량%, 감수제로 나프탈렌 술폰산나트륨과 수산화칼슘을 단독 또는 복합으로 1중량%이하로 함유시키는 것을 특징으로 하는 스트립 캐스팅 주조장치의 사이드댐용 내화조성물에 관한 것이다.In order to achieve the above object, the present invention provides an amorphous refractory composition for use in a portion in contact with a molten metal in a side dam of a metal sheet continuous casting apparatus in contact with both end faces of two cooling rolls. , Alumina Clinker: 53-57% by weight, Fire Resistant Calcia Cliner: 25-30% by weight, Graphite Powder: 4-9% by weight, Stainless Steel Fiber: 2% by weight or less. It relates to a refractory composition for a side dam of a strip casting casting apparatus characterized by containing less than 1% by weight of 5-8% by weight of sodium naphthalene sulfonate and calcium hydroxide alone or in combination as a water reducing agent.

이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.

본 발명에서는 일반적으로 알루미나계 부정형 내화물의 단점인 열간 선 수축율을 개선하기 위하여 알루미나 공급원으로는 가열시 부피팽창이 일어나는 실리마나이트를 소량 첨가하여 고온에서 수축율을 안정화시켰으며 열충격에 의한 균열을 방지하기 위하여 흑연분말과 스테인레스강 섬유(예를들면: 직경 0.5mm, 길이 40mm)를 첨가하여 내화물의 인성을 증진시켰다.In the present invention, in order to improve hot line shrinkage, which is a disadvantage of alumina-based amorphous refractory materials, a small amount of alumina source is added with a small amount of silimite, which causes volume expansion during heating, to stabilize the shrinkage at high temperatures, and to prevent cracking due to thermal shock. In order to improve the toughness of the refractory, graphite powder and stainless steel fibers (for example: 0.5 mm in diameter and 40 mm in length) were added.

또한, 시멘트와 골재로 이루어진 결합구조는 혼련시 필요한 수분량이 수화에 소요될 수분량보다 많으므로 과잉첨가된 수분이 건조과정중 이탈하며 내화물에 기포로 남게 되어 보통의 시멘트경화체의 표면은 매끄럽지 못하다. 그러나 본 발명에서는 계면활성작용 및 다가이온(ion) 용출억제작용이 있는 나프탈렌 술폰산나트륨계 고성능 감수제와 미세입자인 수산화칼슘 슬러리를 혼합하여 첨가하므로써 혼련수분양을 대폭 줄일 수 있다.In addition, the bonded structure composed of cement and aggregate is more than the amount of water required for hydration, so that the excess water is released during the drying process and remains as bubbles in the refractory, the surface of the normal cement hardening body is not smooth. However, in the present invention, the amount of kneaded water can be drastically reduced by adding a mixture of sodium phthalene sulfonate-based high performance sensitizer having a surfactant action and polyion dissolution inhibiting action and a calcium hydroxide slurry as a fine particle.

상기 실리마나이트는 고온에서 수축율을 안정화시키기 위해 첨가하는 것으로, 이 같은 효과를 얻기 위해서는 함량을 5중량%이하로 첨가하는 것이 바람직하다.The silimite is added to stabilize the shrinkage at a high temperature, and in order to obtain such an effect, it is preferable to add a content of 5 wt% or less.

상기 알루미나 클린커는 화학적, 열적 안정성을 우수하게 하는 것으로, 이 같은 효과를 얻기 위해서는 함량를 53-57%로 하는 것이 바람직하다.The alumina clinker is excellent in chemical and thermal stability, in order to obtain such an effect, the content is preferably 53-57%.

상기 내소화성 칼시아 클린커는 내화성과 용강의 청정도를 향상시키는 것으로, 이 같은 효과를 얻기 위해서는 함량을 25-30%로 하는 것이 바람직하다.The fire resistant calcia clinker improves the fire resistance and the cleanliness of molten steel, and in order to obtain such an effect, the content is preferably set to 25-30%.

상기 흑연분말과 상기 스테인레스강 섬유는 파괴인성과 열충격 저항성을 향상시키는 것으로, 이같은 효과를 얻기 위해서는 흑연분말의 함량을 4-9%로 하고, 스테인레스강 섬유의 함량을 2%이하로 하는 것이 바람직하다.The graphite powder and the stainless steel fiber improve the fracture toughness and thermal shock resistance. In order to obtain such effects, the graphite powder is preferably 4-9% and the stainless steel fiber is 2% or less. .

상기 알루미나시멘트는 결합재로서 첨가하는 것으로, 그 함량을 5-8% 첨가하여 결합재로서의 효과를 얻는 것이 바람직하다.The alumina cement is added as a binder, it is preferable to add the content of 5-8% to obtain the effect as a binder.

상기 나프탈린 술폰산나트륨과 수산화칼슘은 단독 또는 복합으로 첨가할 수 있으며, 감수제로서 첨가된다. 감수제로의 적절한 역할을 하기 위해서는 함량을 1%이하로 하는 것이 바람직하다.The sodium naphthalin sulfonate and calcium hydroxide can be added alone or in combination, and are added as a water reducing agent. In order to play an appropriate role as a water reducing agent, the content is preferably 1% or less.

상술한 바와같은 조성을 갖는 본 발명의 내화물은 평균조도가 0.2㎛ 이하인 평활한 성형틀을 이용하면 표면이 미려한 부정형 내화물로 제조가 가능하다. 성형의 구체적인 일예를 들면, 상기 성형틀에서 진동성형한 후 24시간 동안 자연건조, 탈형후 72시간 양생을 행하는 것을 들 수 있는데, 이같이 하여 얻어진 내화물은 표면이 미려하고 강도가 큰 부정형 내화물이 얻어진다.The refractory material of the present invention having the composition as described above can be produced into an amorphous refractory with a beautiful surface by using a smooth molding mold having an average roughness of 0.2 μm or less. As a specific example of the molding, it may be natural drying for 24 hours after the vibration molding in the mold, and curing for 72 hours after demolding, the refractory obtained in this way is obtained in the form of an amorphous refractory with a beautiful surface and high strength. .

이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

실시예Example

하기 표1과 같은 조성으로 부정형 내화물을 제조하였는데, 발명예는 본 발명의 조건에 부합된 부정형 내화물의 화학적 조성이고, 비교예는 본 발명의 조건에 부합되지 않는 부정형 내화물의 화학적 조성이고, 종래예는 일본 특개평 7-68353호에 제시된 바와 같은 재질이었다. 하기 표1에서 기타는 결합재 및 감수재이다.To prepare a refractory refractory with the composition shown in Table 1, the invention example is the chemical composition of the amorphous refractory meeting the conditions of the present invention, the comparative example is the chemical composition of the amorphous refractory does not meet the conditions of the present invention, the conventional example Was the material as shown in Japanese Patent Laid-Open No. 7-68353. In Table 1, others are binders and water-reducing materials.

내화물로의 제조는 통상의 조건으로 행하여, 4가지 종류의 시편으로 제조하였다.The refractory material was prepared under the usual conditions, and prepared into four kinds of specimens.

종래예Conventional example 발명예Inventive Example 비교예Comparative example 비교예 1Comparative Example 1 비교예 2Comparative Example 2 화학성분Chemical composition 함량content 화학성분Chemical composition 함량content 화학성분Chemical composition 함량content 함량content Al2O3SiCC기타Al 2 O 3 SiCC Other 72%14%8%6%72% 14% 8% 6% Al2O3실리마나이트칼시아흑연금속섬유기타Al 2 O 3 Silymanite Calcia Graphite Metal Fiber Others 55%5%26%7%1%6%55% 5% 26% 7% 1% 6% Al2O3실리마나이트칼시아흑연금속섬유기타Al 2 O 3 Silymanite Calcia Graphite Metal Fiber Others 50%5%30%9%1%5%50% 5% 30% 9% 1% 5% 63%5%17%9%1%5%63% 5% 17% 9% 1% 5%

상기한 바와같은 조성을 갖는 시편들을 1350℃에서 예열하여 각 시편의 물성을 측정하고 그 결과를 하기 표2에 나타내었다.Specimens having the composition as described above was preheated at 1350 ℃ to measure the physical properties of each specimen and the results are shown in Table 2 below.

종래예Conventional example 발명예Inventive Example 비교예 1Comparative Example 1 비교예 2Comparative Example 2 예열온도(℃)예열중 변형예열중 균열예열중 감량침식저항성용강젖음성Preheating temperature (℃) Deformation during preheating Crack during preheating Weight loss erosion resistance Molten steel Wetting 13500.2mm없음2wt%보통양호1350 0.2mm None 2wt% 13500.1mm없음1wt%보통양호1350 0.1mm None 1wt% Normal 13500.15mm발생2wt%보통양호13500.15mm Occurrence 2wt% 13500.2mm발생2wt%양호보통13500.2mm Occurrence 2wt%

상기 표2에 나타낸 바와같이, 비교예 1은 알루미나 첨가량이 중량비 50%로써, 본 발명에 부합되는 알루미나의 함량에 비해 상대적으로 밀도가 낮은 흑연이 과다하여 성형체의 결합강도가 낮았으며 이로 인하여 예열도중에 균열현상이 발생하였다. 또한, 비교예 2는 알루미나의 함량이 중량비 63%로서, 용강에 대한 침식에는 강한면을 보였으나 예열중 흑연의 산화로 조직이 약화되어 균열현상을 보였다.As shown in Table 2, in Comparative Example 1, the amount of alumina added was 50% by weight, and the graphite had a relatively low density compared to the content of alumina in accordance with the present invention, resulting in a low bond strength of the molded body. Cracking phenomenon occurred. In addition, in Comparative Example 2, the content of alumina was 63% by weight, showing a strong surface against erosion of molten steel, but the structure was weakened by oxidation of graphite during preheating, resulting in cracking.

또한, 종래예는 카본의 함유량이 높아 사용중 주위환경과 예열중 산화등 여러 가지 제약을 받게 되었으며 알루미나 성분이 높아 용강의 청정도 측면에서 바람직하지 못하였다.In addition, the prior art has been subjected to various restrictions such as oxidation during the preheating environment and the use of high carbon content, and high alumina component was not preferable in terms of cleanliness of molten steel.

이에 반하여, 본 발명의 조건을 만족하는 발명예는 종래예 대비 우수한 물성을 보였다.On the contrary, the invention examples satisfying the conditions of the present invention showed superior physical properties compared to the conventional examples.

상술한 바와같이, 본 발명에 따라 알루미나, 칼시아클린커, 흑연분말과 스틸섬유, 결합재 및 감수재로 구성되는 내화물을 스트립 캐스팅장치의 사이드댐용 내화물로 적용함으로서, 스트립개스팅장치를 사용한 연속주조공정에 있어, 화학적·열적 안정성이 우수하고, 내화성과 용강의 청정도에 우수한 성질을 보이는 효과가 얻어진다.As described above, according to the present invention by applying a refractory consisting of alumina, calcia clinker, graphite powder and steel fibers, binders and water-reducing materials as a refractory for the side dam of the strip casting device, continuous casting using a strip casting device In the process, an effect is obtained which is excellent in chemical and thermal stability and excellent in fire resistance and cleanliness of molten steel.

Claims (1)

두 개의 냉각롤의 양단면에 접하는 금속박판 연속주조장치의 사이드댐에 있어 용탕과 접촉하는 부분에 사용되는 부정형 내화조성물에 있어서,In the amorphous refractory composition used for the part which contacts the molten metal in the side dam of the metal sheet continuous casting apparatus which contact | connects the both ends of two cooling rolls, 실리마나이트:5중량%이하, 알루미나 클린커:53-57중량%, 내소화성 칼시아 클린커:25-30중량%, 흑연분말:4-9중량%, 스테인레스강섬유:2중량%이하로 구성되고, 여기에 결합재로 알루미나시멘트:5-8중량%, 감수제로 나프탈렌 술폰산나트륨과 수산화칼슘을 단독 또는 복합으로 1중량%이하로 함유시키는 것을 특징으로 하는 스트립 캐스팅 주조장치의 사이드댐용 내화조성물Silymanite: 5 wt% or less, Alumina clincher: 53-57 wt%, Fire-resistant calcia clincher: 25-30 wt%, Graphite powder: 4-9 wt%, Stainless steel fiber: 2 wt% or less And alumina cement as a binder: 5-8% by weight, and sodium phthalene sulfonate and calcium hydroxide as a water reducing agent alone or in combination of 1% by weight or less, characterized in that the refractory composition for side dams of the strip casting casting apparatus
KR10-1998-0054691A 1998-12-12 1998-12-12 Refractory materials for producing side dam in strip caster KR100395112B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100977448B1 (en) * 2010-05-12 2010-08-24 (주) 화인테크 A base plate composition for side dam in twin-roll strip caster
KR101132670B1 (en) * 2006-12-26 2012-04-03 재단법인 포항산업과학연구원 A composition for repairing edge dam
CN116854476A (en) * 2023-07-17 2023-10-10 中钢集团洛阳耐火材料研究院有限公司 Titanium carbide aluminum-based ceramic side sealing plate for thin strip continuous casting and preparation method thereof

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JPS60111747A (en) * 1983-11-21 1985-06-18 Harima Refract Co Ltd Nozzle for casting molten steel and its production
FR2671991A1 (en) * 1991-01-25 1992-07-31 Usinor Sacilor REFRACTORY MATERIAL FOR SMALL-SIDE OF A CONTINUOUS CASTING PLANT OF METALS BETWEEN CYCLINDERS, AND SMALL FACE SO REALIZED.
KR940005081B1 (en) * 1991-08-12 1994-06-10 조선내화화학공업 주식회사 Composition of nozzle used casting
JPH09155509A (en) * 1995-12-01 1997-06-17 Toshiba Ceramics Co Ltd Twin roll type strip casting side dam
KR100209064B1 (en) * 1996-12-31 1999-07-15 한종웅 Refractory composition for forming inner-wall in furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101132670B1 (en) * 2006-12-26 2012-04-03 재단법인 포항산업과학연구원 A composition for repairing edge dam
KR100977448B1 (en) * 2010-05-12 2010-08-24 (주) 화인테크 A base plate composition for side dam in twin-roll strip caster
CN116854476A (en) * 2023-07-17 2023-10-10 中钢集团洛阳耐火材料研究院有限公司 Titanium carbide aluminum-based ceramic side sealing plate for thin strip continuous casting and preparation method thereof

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