KR100821190B1 - Sliding plate refractories for flow controling of molten metal - Google Patents

Sliding plate refractories for flow controling of molten metal Download PDF

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KR100821190B1
KR100821190B1 KR1020060127764A KR20060127764A KR100821190B1 KR 100821190 B1 KR100821190 B1 KR 100821190B1 KR 1020060127764 A KR1020060127764 A KR 1020060127764A KR 20060127764 A KR20060127764 A KR 20060127764A KR 100821190 B1 KR100821190 B1 KR 100821190B1
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weight
alumina
sliding plate
parts
particle size
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KR1020060127764A
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Korean (ko)
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나용한
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조선내화 주식회사
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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
    • B22D41/14—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
    • B22D41/28—Plates therefor
    • B22D41/30—Manufacturing or repairing thereof
    • B22D41/32—Manufacturing or repairing thereof characterised by the materials used therefor
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A sliding plate refractory is provided to extend a life span of a sliding plate by improving mechanical strength, thermal shock resistance and erosion-resistant characteristics of the sliding plate. A sliding plate refractory comprises 15 to 35 weight percent of alumina or sintered alumina having a grain size of 4 to 1mm, 15 to 40 weight percent of alumina or sintered alumina having a grain size of 1 to 0.2mm, 20 to 40 weight percent of alumina or sintered alumina having a grain size of 0.2mm or less, 5 to 15 weight percent of alumina or sintered alumina having a grain size of 0.4mm or less, 1 to 10 weight percent of carbon having a grain size of 0.2mm or less, and 1 to 8 weight percent of metal. The metal includes at least one of Al, Mg, Si, Al, and Al-Si.

Description

용융금속 흐름제어용 슬라이딩플레이트 내화재{sliding plate refractories for flow controling of molten metal}Sliding plate refractories for flow controling of molten metal}

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

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

3: 상부 슬라이딩플레이트 4: 하부 슬라이딩플레이트3: upper sliding plate 4: lower sliding plate

본 발명은 용융금속의 흐름을 제어하는 장치에 이용되는 슬라이딩플레이트(Sliding Plate)내화재에 관한 것으로, 보다 상세하게는 용강류 및 비금속산화물에 대한 내용손 및 산화에 따른 균열을 방지하는데 적합한 용융금속 흐름제어용 슬라이딩플레이트 내화재에 관한 것이다.The present invention relates to a sliding plate refractory material used in a device for controlling the flow of molten metal, and more particularly, to a molten metal flow suitable for preventing cracking due to loss of contents and oxidation of molten steel and nonmetal oxides. It relates to a sliding plate refractory material for control.

일반적으로 레들(Ladle) 및 턴디쉬(Tundish)하부에는 용강의 배출 및 그 배출량을 제어하기 위한 슬라이딩플레이트가 장착된다.In general, the ladle and the tundish lower portion is equipped with a sliding plate for controlling the discharge of the molten steel and its discharge.

도 1은 슬라이딩플레이트 구조의 단면도를 나타낸 것으로, 상부노즐(1)과 하부노즐(2)이 장착되고 그들 사이에는 내화재질로 된 상부 슬라이딩플레이트(3)와 하부 슬라이딩플레이트(4)가 설치된다.1 shows a cross-sectional view of a sliding plate structure, in which an upper nozzle 1 and a lower nozzle 2 are mounted, and an upper sliding plate 3 and a lower sliding plate 4 made of refractory material are installed therebetween.

슬라이딩플레이트 내화재는 그 사용 횟수의 중가, 주조시간의 증가와 조업 주조회수, 주조후 산소세척, 강종, 슬라이딩플레이트 재질 및 형상 등에 다라서 그 수명이 결정되게 된다.The sliding plate refractory material is determined by the increase in the number of times of use, the increase in the casting time and the number of times of operation casting, the post-casting oxygen washing, the steel grade, the sliding plate material and shape, and the like.

이들 내화재질은 주조초 열충격과 슬라이딩플레이트가 장착되는 메카, 레들 또는 턴디쉬의 바닥 평탄도에 따라 구속응력의 편차가 발생되어 균열이 발생되게 된다. 균열이 발생되면 용강류에 질소나 산소의 유입을 초래하여 용강의 품질을 저하시키기도 하며 사용중 슬라이딩플레이트 내화재의 탈락까지 야기하며 제강, 연속주조 조업시 용강유출의 문제점을 야기시 킬 수 있다.These refractory materials are cracked due to the deviation of restraint stress according to the casting flat thermal shock and the bottom flatness of the mecha, ladle or tundish on which the sliding plate is mounted. If a crack occurs, it may cause nitrogen or oxygen to flow into the molten steel, thereby degrading the quality of the molten steel, causing the sliding plate to fall out of the refractory material, and causing a problem of molten steel during steelmaking and continuous casting operation.

이러한 문제점을 개선하기 위해서는 내화재의 미세구조와 화학조성을 제어해야 한다. 특히 최근에는 내화재 사용량 절감과 재조경비 절감을 위해서는 다회 사용에도 문제가 없도록 재질의 개선이 요구되고 있다.   In order to solve this problem, it is necessary to control the microstructure and chemical composition of the refractory material. In particular, in recent years, in order to reduce the amount of refractory materials and to reduce re-expenses, the improvement of materials is required so that there is no problem even in the use of multiple times.

일반적으로 슬라이딩플레이트의 사용중 발생되는 문제점과 이에 대한 개선방법은 크게 4가지로 분류될 수 있다.In general, the problems occurring during the use of the sliding plate and how to improve it can be classified into four categories.

첫번째로 균열 및 용강류에 의한 마모, 산화 및 황폐화, 용강성분이나 비금속산화물에 의한 화학적 용손으로 그 사용수명이 제한되고 있다.First, its service life is limited due to abrasion, oxidation and deterioration due to cracks and molten steel, and chemical melting caused by molten steel or nonmetal oxides.

균열의 원인은 주조초 열충격과 카세트 변형, 면압유지불량, 슬라이딩플레이트의 지지방식, 형상 등에 의해 이루어지고 있으며 이를 개선하기 위해서는 내화 구성재질의 열팽창계수를 낮추고, 열전도율을 높이는 방안과 미세조직제어, 카세트 관리강화, 슬라이딩플레이트의 메탈밴드 체결상태의 개선이 요망된다.The cause of the crack is caused by the thermal shock and deformation of the cassette, the failure of the surface pressure, the support method of the sliding plate, the shape, and the like. To improve this problem, the thermal expansion coefficient of the refractory materials is lowered, the thermal conductivity is increased, the microstructure control, the cassette Improved management and improvement of metal band fastening state of sliding plate are needed.

용강류에 의한 마모나 비금속산화물에 의한 내용선 개선을 위해서는 용강류 마모에 대한 저항성 높은 탄소의 첨가와 미세조직의 제어로 기계적강도, 기공율, 기공경 제어로 가능하고, 강종에 따라서는 별도의 조성을 갖는 내화조성의 재질의 적용이 요구된다.In order to improve wear of molten steel or the content line by non-metal oxides, it is possible to control mechanical strength, porosity, and pore size by adding carbon with high resistance to molten steel wear and controlling microstructures. Application of the material of fire resistance which has is required.

강종에 고산소상이나 Mn, Ca함량이 높은 경우는 이들 성본에 의해 슬라이딩플레이트 구성성분이 환원되거나 화학적 반응에 의한 저융물 형성과 탈탄에 의해 화학적 내용성이 현저히 저하하게 된다. 따라서 이들 강종에 적합한 내화조성이 요구된다.In the case of high oxygen content, high Mn, and Ca content in steel grades, the sliding plate constituents are reduced by these properties, or the chemical contents are significantly reduced by low melt formation and decarburization by chemical reaction. Therefore, fire resistance suited for these steel grades is required.

산화 및 황폐화 현상은 슬라이딩플레이트의 내용성 향상을 위해 첨가한 탄소가 사용중 산화에 의해 탈탄되므로서 이들 성분에 의한 조직결합력이 약화되고 이에 따른 공극형성과 비금속산화물에 의한 부착이 용이하게 이루어져 슬라이딩 되는 부위의 내화재 구성성분 일부가 용손되게 된다. Oxidation and deterioration phenomenon is because the carbon added to improve the contents of the sliding plate is decarburized by oxidation during use, which weakens the tissue binding force due to these components and thus makes it easier to form pores and adhere by non-metal oxides. Some of the refractory materials of the components are dissolved.

이를 개선하기 위해서는 저온 및 고온에서 산화방지가 가능한 카바이드(Carbides), 보라이드(Borides), 옥시나이트라이드(Oxynitrides), 글라스(Glass)상 형성이 가능한 화학조성의 첨가제나 SiO2 계, B2O3 계, P2O3계, V2O5계의 산화물 및 비산화물계, 금속류(Al, Mg, Si, Al,Al-Si등)와 Nitrides(BN,ZrN, AlON)와 표면코팅(Sol-Gel)에 의한 산화물코팅, 산화방지 조성의 코팅액에 의한 스프레이(Spray), dip coating방법에 의해 개선이 가능하다. 마지막으로 지금침투에 따른 조직의 황폐화현상은 용강과의 젖음성이 낮은 성분의 첨가로 이의 개선이 가능하다. 또한 용강의 침윤과 부착지금에 대한 저항성을 높이기 위해서는 극초미분에 의 한 미세조직의 개선이 가능하다.In order to improve this, additives of chemical composition capable of forming carbides, borides, oxynitrides and glass phases which can be prevented from oxidation at low and high temperatures or SiO 2 Oxides and non-oxides, metals (Al, Mg, Si, Al, Al-Si, etc.) and Nitrides (BN, ZrN, AlON), B 2 O 3 , P 2 O 3 and V 2 O 5 And it can be improved by the oxide coating by the surface coating (Sol-Gel), spray (spray) by the coating liquid of the antioxidant composition, dip coating method. Lastly, the tissue degradation caused by the current penetration can be improved by the addition of a low wettability component with molten steel. Also, in order to increase resistance to infiltration and adhesion of molten steel, it is possible to improve the microstructure by ultrafine powder.

탄소함량의 증가시 부착은 현저히 저하될 수 있으나 첨가된 탄소가 산화될 경우 오히려 조직황폐화 현상이 가속화될 수 있으므로 이에 대한 배려가 필요하다. 따라서 적정량의 탄소와 내용성 개선을 위한 입도 개선으로 문제의 개선이 이루어져야 한다.When carbon content is increased, adhesion may be significantly lowered, but when the added carbon is oxidized, tissue deterioration may be accelerated. Therefore, the problem should be improved by improving the appropriate amount of carbon and particle size for improving the content.

상기의 문제점과 개선방안을 위한 종래의 특허(한국등록10-0318494호)에서는 Ca처리를 행하는 특수 강종에 대한 내용성 개선을 위하여 소결, 전융MgO 60∼90중량부, 가소마그네시아 5∼20중량부, 금속알루미늄화이버 또는 분말 2∼30중량부, 탄소 1∼8중량부, 산화방지제 0.5∼4중량부로 이루어져 있다.In the conventional patent (Korean Patent Registration No. 10-0318494) for the above problems and improvement measures, 60 to 90 parts by weight of sintered, molten MgO, and 5 to 20 parts by weight of magnesia for improvement in the contents of special steels subjected to Ca treatment. 2 to 30 parts by weight of metal aluminum fiber or powder, 1 to 8 parts by weight of carbon, and 0.5 to 4 parts by weight of antioxidant.

그러나 상기 특허는 사용중 간헐적으로 발생되는 균열로 인하여 고수명화용으로는 미흡하므로서 균열개선과 내용성 개선이 요구되고 있다. However, since the patent is insufficient for high service life due to intermittent cracking during use, crack improvement and durability improvement are required.

본 발명은 상기한 종래의 문제점을 개선하기 위한 것으로, 극초미분 첨가에 따른 미세조직의 개선으로 기계적강도 등의 물성을 향상시킴과 함께 내열충격성 및 내식성개선으로 사용수명이 증진된 슬라이딩플레이트 내화재를 제공하고자 하는데 그 목적이 있다.The present invention is to improve the conventional problems described above, by improving the microstructure according to the addition of ultra-fine powder, while improving the physical properties such as mechanical strength and provide a sliding plate fireproof material with improved service life by improving the thermal shock resistance and corrosion resistance There is a purpose.

상기한 목적 달성을 위한 본 발명은 4∼1mm 입도를 갖는 소결 또는 전융알루미나(Al2O3) 15∼35중량부, 1∼0.2mm 입도를 갖는 소결 또는 전융알루미나 15∼40중 량부, 0.2mm 이하 입도를 갖는 소결 또는 전용알루미나 20∼40중량부, 0.04mm 이하 입도를 갖는 소결 또는 전융알루미나 5∼15중량부, 50㎛ 이하 입도를 갖는 가소알루미나 5∼20중량부, 0.2mm 이하 입도를 갖는 탄소(C) 1∼10중량부, 금속류(Al, Mg, Si, Al,Al-Si 중 적어도 1종) 1∼8중량부, 필요에 따라 산화방지제 0.5∼4중량부 배합하여서 됨을 특징으로 하는 용융금속 흐름제어용 슬라이딩플레이트 내화재 조성물로 이루어진다.The present invention for achieving the above object is 15 to 35 parts by weight of sintered or electrolytic alumina (Al 2 O 3 ) having a particle size of 4 ~ 1mm, 15 to 40 parts by weight of sintered or electrolytic alumina having a particle size of 1 ~ 0.2mm, 0.2mm 20 to 40 parts by weight of sintered or dedicated alumina having a particle size of less than or equal to 0.04 mm, 5 to 15 parts by weight of sintered or electrolytic alumina having a particle size of less than or equal to 50 μm, 5 to 20 parts by weight of plasticized alumina having a particle size of less than or equal to 50 μm, 1 to 10 parts by weight of carbon (C), 1 to 8 parts by weight of metals (at least one of Al, Mg, Si, Al, and Al-Si), and 0.5 to 4 parts by weight of an antioxidant if necessary. It consists of a sliding plate refractory composition for molten metal flow control.

본 발명은 상기 원료의 배합 및 소성공정을 통하여 최종적으로 나타나는 화학성분비는 알루미나(Al2O3)가 73∼92중량%, 탄소(C)가 6∼13중량%, 탄화규소(SiC)가 2∼6중량%로 이루어진다.In the present invention, the chemical composition ratio finally obtained through the mixing and firing process of the raw material is 73 to 92% by weight of alumina (Al 2 O 3 ), 6 to 13% by weight of carbon (C), silicon carbide (SiC) is 2 It consists of-6 weight%.

본 발명은 소결 또는 전융알루미나에 대해 입도별로 구분화함과 함께 0.2mm이하 입도의 배합량을 증량하고 또한 가소알루미나에 대해 극초미분 함량을 증량시키므로서 내식성 개선 및 기계적강도 등의 물성을 현저히 개선할 수 있다.The present invention can distinguish the sintered or molten alumina by particle size and increase the blending amount of the particle size of 0.2mm or less, and also increase the ultra fine content of the plastic alumina, thereby significantly improving the corrosion resistance and mechanical properties such as mechanical strength. .

본 발명은 소결 또는 전융알루미나는 순도가 95% 이상이고, 가소알루미나는 알루미나가 99%이상 이고 50㎛ 이하가 바람직하다. 가소알루미나를 배합함에 있어 그 사용량이 5중량부 이하일 경우는 강도 개선효과가 미흡하고, 20중량부 이상일 경우는 내스폴링성이 저하되는 문제점이 있다.In the present invention, the sintered or molten alumina has a purity of 95% or more, and the plastic alumina has alumina of 99% or more and preferably 50 μm or less. In the case of blending the plastic alumina, when the amount thereof is 5 parts by weight or less, the effect of improving strength is insufficient, and when it is 20 parts by weight or more, the spalling resistance is deteriorated.

탄소(C)가 6중량부 이하일 경우는 내스폴링성이 저하되고, 13중량부 이상은 강도저하와 내산화성이 저하되는 문제점이 있다.When the carbon (C) is 6 parts by weight or less, spalling resistance is lowered, and at least 13 parts by weight has a problem of lowering strength and oxidation resistance.

상기한 탄소는 함침 이외 배합상 첨가되고 광물형태는 무정형(Carbon black, 무연탄 등(이나 결정형(흑연)을 첨가하고 경우에 따라서는 0.2mm 이하 정도 크기의 입도를 적용할 수 있다.The above-mentioned carbon is added in addition to the impregnation, and the mineral form may be amorphous (carbon black, anthracite, or the like (or crystalline (graphite)) is added, and in some cases, a particle size of about 0.2 mm or less may be applied.

산화방지제는 소량 첨가되는 것으로 그 범위는 0.5∼4중량부 범위이고, 첨가성분은 Carbides, Bordes, Nitrides, Oxynitrides, Oxycarbides 등이 1종 이상 배합될 수 있다.A small amount of antioxidant is added, and the range thereof is 0.5 to 4 parts by weight, and the additive component may include one or more of Carbides, Bordes, Nitrides, Oxynitrides, Oxycarbides, and the like.

금속규소(Si)등은 첨가량이 증가되면 강도는 증가되지만 많은량은 내열스폴링성을 저하시키므로 5중량부 이하가 바람직하다.Metal silicon (Si), etc., the strength is increased when the addition amount is increased, but a large amount is preferably 5 parts by weight or less because it lowers the heat spalling resistance.

본 발명은 내화재를 제조함에 있어서는 상기 배합량에 따라 배합하여 환원분위기 하에서 1250℃∼1550로 소성하거나 함침에 의해 조직을 치밀화한다. In the present invention, in the production of a refractory material, it is blended according to the above blended amount, and calcined at 1250 ° C to 1550 under reducing atmosphere or densified structure by impregnation.

한편 상기 배합 혼련시에 사용되는 유기바인더는 Rosol형이나 Novolac형의 Resin이 이용되고 경우에 따라서는 Silicon Resin과 Furan변형수지를 이용할 수 있다. On the other hand, the organic binder used in the kneading kneading may be used a Rosol type or Novolac type Resin, and in some cases Silicon Resin and Furan strain resin.

다음은 실시예에 따라 설명한다.The following is described according to the embodiment.

원료    Raw material 입도   Granularity 종래   Conventional 본 발명의 실시예            Embodiment of the present invention 1    One 2  2 3  3 4  4 5  5 6  6 배 합 원 료   Compound raw materials 소결또는 전융 Al2O3 Sintered or Electrolytic Al 2 O 3 4∼1mm4 to 1 mm 소결 또는 전융 MgO 60∼90 Sintered or Electrolytic MgO 60 ~ 90 20   20 20  20 20  20 25  25 30  30 30  30 1∼ 0.2mm1 to 0.2mm 34    34 22   22 23   23 27   27 18   18 17   17 -0.2mm-0.2mm 25   25 22  22 24  24 31  31 34  34 20  20 -0.04mm-0.04mm 9.5   9.5 10  10 10  10 7   7 6   6 8   8 가소알루미나 Plastic alumina -50㎛ -50㎛ 가소MgO 5∼20Plastic MgO 5-20 5     5 15   15 10   10 8   8 8   8 8    8 금속SiMetal Si -0.02mm-0.02mm Al2∼30Al2-30 2    2 3   3 3   3 3  3 1  One 5   5 탄소carbon -0.2mm-0.2mm 1∼8 1 to 8 4    4 6   6 8   8 5  5 2  2 8   8 산화방지제Antioxidant 0.5∼4 0.5 to 4 0.5   0.5 2   2 2   2 2  2 1  One 4   4 물 성  Properties 기공율(%)Porosity (%) 7∼13 7-13 5.0   5.0 4.5  4.5 6.3  6.3 5.7  5.7 6.1 6.1 5.8  5.8 부피비중 Volume specific gravity 3∼3.2 3 to 3.2 3.15  3.15 3.2 3.2 3.21 3.21 3.26 3.26 3.22 3.22 3.28 3.28 압축강도(kg/cm2)Compressive strength (kg / cm 2 ) 1200 ∼17001200-1700 2150  2150 2870  2870 1600  1600 2300  2300 1780  1780 2100  2100 최종 화학성분 (%)Final Chemical Composition (%) 구성광물상  Construction 페리클레 이즈 금속 Al, CPericles Metal Al, C 코런덤 β-SiCCorundum β-SiC 좌 동 Left east 좌 동 Left east 좌 동 Left east 좌 동 Left east 좌 동 Left east Al2O3 Al 2 O 3 MgO60∼90MgO60 to 90 91.2 91.2 88.8 88.8 84.6 84.6 88.7 88.7 90 90 79 79 SiC  SiC -   - 2.8  2.8 4  4 4.4  4.4 4.3  4.3 2  2 6  6 C   C 6∼8  6 to 8 6  6 8  8 12  12 7  7 5  5 6  6 내침식성(%) Corrosion Resistance (%) 100   100 70  70 75 75 65  65 86 86 95 95 90 90 내열충격성 Thermal shock resistance 균열   crack 양호  Good 양호 Good 양호 Good 양호 Good 양호 Good 양호 Good

※ 내침식성: 고주파유도로에서 1650℃×3시간※ Corrosion resistance: 1650 ℃ × 3 hours at high frequency induction

※ 내열충격성: 1200℃ 버너로 1분 가열※ Thermal shock resistance: 1 minute heating with 1200 ℃ burner

상기 실시예( 1∼6)에서 알 수 있는 바와 같이 기존의 MgO-C 질에 대한 내열충격성 개선목적으로 MgO보다 내열충격성이 우수한 알루미나 원료 특히 0.2mm 이하 입도량을 증량시키므로서 미세조직의 개선으로 기공율 및 강도의 향상이 가능함을 알 수 있다. As can be seen in the above Examples (1 to 6) to improve the thermal shock resistance of the existing MgO-C quality by improving the microstructure by increasing the particle size of the alumina material, especially 0.2mm or less excellent thermal shock resistance than MgO It can be seen that the porosity and strength can be improved.

실시예 2는 미세조직 강화를 위해 초미분 가소알루미나를 증량한 것으로 기계적강도 향상이 이루어지고, 실시예 3의 경우는 내용성 즉, 내열충격성의 향상과 화학적 내용성향상을 위해 탄소를 증량한 것임을 알 수 있다.Example 2 is an increase in ultra fine plastic alumina to strengthen the microstructure, and mechanical strength is improved. In Example 3, carbon is increased to improve solvent resistance, that is, thermal shock resistance and chemical resistance. Able to know.

또한 실시예 공히 ZrO2 와 SiO2 를 극소화 함으로써 강종중 환원성 강종인 스테인레스강과 일반강종 고Mn 강종에 대해 적합하도록 한 재질이다.In addition, by minimizing ZrO 2 and SiO 2 in the embodiment, it is a material that is suitable for stainless steel and general Mn high Mn steel, which are reducing steels among steel grades.

실시예 공히 산화방지제 및 금속Si 첨가에 따른 SiC화합물에 의한 내산화성 개선을 위한 것이다.Example is to improve the oxidation resistance by the SiC compound according to the addition of antioxidant and metal Si.

본 발명은 Ca처리 강종에 대하여 화학적 내용성 향상을 위해 정련을 위해 첨가된 Ca Powder가 탈산, 탈류에 의해 형성된 화합물이 플레이트 내화재와 반응시 저융점화합물인 CaO-Al2O3계 광물을 형성하여도 CaO-SiO2-ZrO2-Al2O3 계의 저융물을 형성하지 않는 Al2O3계이고, 첨가 원료중 SiO2가 없는 내화재로 이루어진 특수용도의 화학조성을 갖는 내화재이다.The present invention forms CaO-Al 2 O 3 mineral, which is a low melting point compound when Ca powder added for refining to improve chemical content of Ca-treated steel species is reacted with plate refractory material by deoxidation and dehydration. FIG refractory material having a CaO-SiO 2 -ZrO 2 -Al 2 O 3 and based low yungmul not forming Al 2 O 3 of the type, the chemical composition of the raw material added for special purposes consisting of a refractory material with no SiO 2.

이상에서와 같이 본 발명은 초미분 알루미나원료의 증량함과 함께 입도분포의 적절한 배합에 따른 미세조직의 개선으로 기계적강도 등의 물성을 향상시킴과 함께 내열충격성 및 내식성개선으로 사용수명이 증진된 슬라이딩플레이트 내화재를 얻게 된다.As described above, the present invention increases the service life by improving the thermal shock resistance and corrosion resistance while improving physical properties such as mechanical strength and the like by increasing the finely divided alumina raw material and improving the microstructure according to the appropriate mixing of the particle size distribution. Plate refractory material is obtained.

Claims (3)

4∼1mm 입도를 갖는 소결 또는 전융알루미나(Al2O3) 15∼35중량부, 1∼0.2mm 입도를 갖는 소결 또는 전융알루미나 15∼40중량부, 0.2mm 이하 입도를 갖는 소결 또는 전용알루미나 20∼40중량부, 0.04mm 이하 입도를 갖는 소결 또는 전융알루미나 5∼15중량부, 50㎛ 이하 입도를 갖는 가소알루미나 5∼20중량부, 0.2mm 이하 입도를 갖는 탄소(C) 1∼10중량부, 금속류(Al, Mg, Si, Al,Al-Si 중 적어도 1종) 1∼8중량부 배합하여서 됨을 특징으로 하는 용융금속 흐름제어용 슬라이딩플레이트 내화재.15 to 35 parts by weight of sintered or electrolytic alumina (Al 2 O 3 ) having a particle size of 4 to 1 mm, 15 to 40 parts by weight of sintered or electrolytic alumina having a particle size of 1 to 0.2 mm, sintered or dedicated alumina having a particle size of 0.2 mm or less 20 5-40 parts by weight of sintered or electrolytic alumina having a particle size of 0.04 mm or less, 5-20 parts by weight of plastic alumina having a particle size of 50 μm or less, 1-10 parts by weight of carbon (C) having a particle size of 0.2 mm or less , 1 to 8 parts by weight of metals (at least one of Al, Mg, Si, Al, and Al-Si) are blended, and the sliding plate refractory material for molten metal flow control. 제 1항에 있어서,The method of claim 1, 상기 원료의 배합에 이어서 소성공정을 통하여 최종적으로 나타나는 화학성분비가 알루미나(Al2O3) 73∼92중량%, 탄소(C) 6∼13중량%, 탄화규소(SiC) 2∼6중량이고, 나머지는 기타 불순물로 조성됨을 특징으로 하는 용융금속 흐름제어용 슬라이딩플레이트 내화재Subsequent to the blending of the raw materials, the chemical component ratio finally obtained through the firing process is 73 to 92% by weight of alumina (Al 2 O 3 ), 6 to 13% by weight of carbon (C), and 2 to 6% by weight of silicon carbide (SiC), Refractory sliding plate for molten metal flow, characterized in that the rest is composed of other impurities 제 1항에 있어서,The method of claim 1, 상기 원료에 Carbides, Bordes, Nitrides, Oxynitrides, Oxycarbides 중 적어도 1종의 산화방지제가 0.5∼4중량부 배합하여서 됨을 특징으로 하는 용융금속 흐름제어용 슬라이딩플레이트 내화재At least one antioxidant of Carbides, Bordes, Nitrides, Oxynitrides, Oxycarbides to the raw material is 0.5 to 4 parts by weight of a sliding plate refractory material for molten metal flow control, characterized in that
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100983374B1 (en) 2008-05-27 2010-09-24 주식회사 포스코 Apparatus for throwing refinery melted iron into ladle
CN115947591A (en) * 2022-08-15 2023-04-11 河北国亮新材料股份有限公司 Medium-temperature sintered metal-bonded aluminum-zirconium-carbon sliding plate brick with high carbon content and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890014193A (en) * 1988-03-30 1989-10-23 원본미기재 Lower fixing plate of sliding gate valve for metallurgy vessel
KR930702248A (en) * 1990-10-11 1993-09-08 Refractory parts of devices for controlling or stopping jets of steel with high alumina content containing sialon binders
KR930702249A (en) * 1990-10-24 1993-09-08 미첼 웰터 Refractory material combined with sialon matrix and preparation method thereof
KR20040001602A (en) * 2002-06-28 2004-01-07 주식회사 포스코 HEAT INSULATING MATERIAL FOR TUNDISH COMPRISING MgO

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890014193A (en) * 1988-03-30 1989-10-23 원본미기재 Lower fixing plate of sliding gate valve for metallurgy vessel
KR930702248A (en) * 1990-10-11 1993-09-08 Refractory parts of devices for controlling or stopping jets of steel with high alumina content containing sialon binders
KR930702249A (en) * 1990-10-24 1993-09-08 미첼 웰터 Refractory material combined with sialon matrix and preparation method thereof
KR20040001602A (en) * 2002-06-28 2004-01-07 주식회사 포스코 HEAT INSULATING MATERIAL FOR TUNDISH COMPRISING MgO

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100983374B1 (en) 2008-05-27 2010-09-24 주식회사 포스코 Apparatus for throwing refinery melted iron into ladle
CN115947591A (en) * 2022-08-15 2023-04-11 河北国亮新材料股份有限公司 Medium-temperature sintered metal-bonded aluminum-zirconium-carbon sliding plate brick with high carbon content and preparation method thereof

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