KR100328048B1 - Basic dam block refractory composition - Google Patents

Basic dam block refractory composition Download PDF

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KR100328048B1
KR100328048B1 KR1019970060758A KR19970060758A KR100328048B1 KR 100328048 B1 KR100328048 B1 KR 100328048B1 KR 1019970060758 A KR1019970060758 A KR 1019970060758A KR 19970060758 A KR19970060758 A KR 19970060758A KR 100328048 B1 KR100328048 B1 KR 100328048B1
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dam block
weight
comparative example
refractory composition
porous
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KR1019970060758A
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KR19990040398A (en
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장준혁
김효준
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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
    • 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
    • C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
    • C04B35/043—Refractories from grain sized mixtures
    • 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
    • C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B2235/40—Metallic constituents or additives not added as binding phase

Abstract

PURPOSE: A basic dam block refractory composition is provided, to contain a flammable material and a foaming material into a basic dam block to make the dam block with the porous structure, thereby allowing the nonmetal contained in the molten steel to be permeated into the dam block easily and improving the nonmetal trapping property. CONSTITUTION: The basic dam block refractory composition comprises 50-60 wt% of a magnesia clinker containing 95 wt% or more of MgO; 10-25 wt% of porous magnesia; 10-20 wt% of a flammable or volatile material; 2-5 wt% of metal aluminum; 1-3 wt% of sodium hexameta phosphate; and 3-5 wt% of magnesium sulfate, magnesium chloride or their mixtures. Preferably the flammable or volatile material is selected from the group consisting of saw dust, cokes particle and naphthalene.

Description

염기성 댐블록 내화조성물Basic Damblock Refractory Composition

본 발명은 턴디쉬의 댐블록으로 사용되는 내화조성물에 관한 것으로, 보다 상세하게는 비금속 개재물의 포집능이 우수한 염기성 댐블록 내화조성물에 관한 것이다.The present invention relates to a refractory composition used as a dam block of a tundish, and more particularly to a basic dam block refractory composition having excellent capturing ability of nonmetallic inclusions.

일반적으로 턴디쉬에 설치된 댐블록은 용강중에 존재하는 개재물의 부상, 분리가 잘 되도록 용강의 흐름을 조절하는 역할을 하며, 사용되는 대표적인 재질로서는 알루미나질을 들 수 있다. 그러나, 최근에는 비금속개재물의 포집능을 높이기 위해 염기성 댐블록이 개발되어 있기도 하며, 비금속개재물의 포집능을 높이기 위해 댐블록에 여러개의 구멍을 개공하거나 또는 세라믹 필터를 설치해서 용강이 그곳을 통과하게 하여 비금속개재물과 접촉하는 면적을 최대한 넓게하는 댐블록의 형상변경도 행해지고 있기도 하다.In general, the dam block installed in the tundish serves to control the flow of the molten steel so that the inclusion and separation of the inclusions in the molten steel is well, and the representative material used may include alumina. Recently, however, basic dam blocks have been developed to increase the trapping capacity of non-metallic inclusions, and in order to increase the trapping ability of non-metallic inclusions, multiple holes are opened in the dam block or ceramic filters are installed to allow molten steel to pass therethrough. As a result, the shape of the dam block which maximizes the area of contact with the nonmetallic inclusions as much as possible is also being performed.

상기 세라믹필터에 의한 비금속개재물 제거방법에 관한 것 중에서 대표적인 것으로는 일본에서 제안된 특허공개공보(평)6-238402호 및 (평)7-90343호를 들 수 있는데, 상기 (평)6-238402호는 턴디쉬내에 설치된 2개의 내화물제질의 필터를 회전시켜서 비금속개재물을 포집하는 포집방법에 관한 것이며, 상기 (평)7-90343호는 원통관 필터를 이용하여 용강중의 비금속개재물을 제거하는 방법에 관한 것이다. 그러나, 이와같은 방법에 의하면 설치에 어려움이 있고, 또한 개재물에 의해 세라믹필터가 막히게 되는 문제가 있다Representative examples of the method for removing non-metallic inclusions by the ceramic filter include Japanese Patent Application Laid-Open Nos. 6-238402 and 7-90343 proposed in Japan. No. 7 relates to a method of collecting non-metallic inclusions by rotating two refractory-based filters installed in a tundish, and (Pyeong) 7-90343 relates to a method of removing non-metallic inclusions in molten steel using a cylindrical tube filter. It is about. However, according to such a method, installation is difficult and there is a problem that the ceramic filter is blocked by inclusions.

일반적으로, 턴디쉬용 댐블록은 내화물 조직이 치밀하기 때문에 댐블록의 표면에 비금속개재물이 부착하여 제거되는데에는 한계가 있다. 그리고, 다공체 댐블록과 세라믹필터가 설치된 댐블록은 비금속개재물의 포집능에 있어 일반 댐블록보다 효과가 높기는 하지만, 설치에 어려움이 많고 구멍이나 세라믹필터가 개재물에 의해 잘 막히기 때문에 개재물제거에 한계가 있다.In general, the tundish dam block has a limited refractory structure because the non-metallic inclusions are attached to the dam block surface to remove it. In addition, the dam block with the porous dam block and the ceramic filter is more effective than the general dam block in the capturing ability of non-metallic inclusions, but it is difficult to install and the hole or ceramic filter is well blocked by the inclusions. have.

이에 본 발명은 가연성물질과 발포성물질을 염기성 댐블록에 포함시킴으로써, 댐블록 자체가 다공성조직이 되도록 하여 강중의 비금속개재물이 댐블록 내부로 침투가 용이하게 하여 비금속개재물의 포집능을 향상시키고, 침윤층과 댐블록 원재질간의 경계면에 균열이 발생하여 침윤층이 탈락되도록 하여 비금속개재물의 포집능을 향상시킬 수 있는 턴디쉬용 댐블록 내화조성물을 제공하고자 하는데, 그 목적이 있다.Accordingly, the present invention includes the combustible material and the expandable material in the basic dam block, so that the dam block itself becomes a porous structure, so that the non-metallic inclusions in the river can easily penetrate into the dam block, thereby improving the capturing ability of the non-metallic inclusions, and infiltration. The purpose of the present invention is to provide a damblock refractory composition for tundish that can improve the trapping ability of non-metallic inclusions by causing cracks in the interface between the layer and the dam block material to eliminate the infiltrating layer.

본 발명자들은 턴디쉬용 댐블록재질로서 비금속개재물의 포집능이 우수한 댐블록 재질을 사용하면 유효할 것이라는 점을 감안하여, 연구와 실험을 거듭하고 그 결과에 근거하여 본 발명을 제안하게 되었다.The present inventors have repeatedly conducted studies and experiments in consideration of the fact that a dam block material having excellent capturing ability of non-metallic inclusions as a dam block material for tundish will be effective, and suggests the present invention based on the results.

상기한 바와같은 관점으로 부터 출발한 본 발명은 댐블록 내화조성물에 있어서, MgO성분을 95중량%이상 함유하는 마그네시아 클링커:50-60중량%, 다공성 마그네시아:10-25중량%, 가연성 또는 휘발성물질:10-20중량%, 금속 알루미늄:2-5중량%, 헥사메타인산소다:1-3중량%와 여기에, 황산마그네슘과 염화마그네슘을 단독 또는 복합으로 3-5중량% 포함시켜 조성되는 염기성 댐블록 내화조성물에 관한 것이다.Starting from the above point of view, the present invention provides a magnesia clinker containing at least 95% by weight of MgO in a damblock refractory composition: 50-60% by weight, porous magnesia: 10-25% by weight, flammable or volatile material. : 10-20% by weight, metal aluminum: 2-5% by weight, hexametaphosphate: 1-3% by weight and basic composition formed by containing 3-5% by weight of magnesium sulfate and magnesium chloride alone or in combination It relates to a dam block refractory composition.

이하, 내화조성물의 성분 한정 이유를 설명한다.Hereinafter, the reason for component limitation of a fireproof composition is demonstrated.

상기 마그네시아 클링커는 MgO성분을 95중량%이상 함유하는 것으로서, 그 함량은 50-60중량%로 한정하는 것이 바람직하다.The magnesia clinker contains 95% by weight or more of MgO component, the content is preferably limited to 50-60% by weight.

마그네시아 클링커에는 해수소결 마그네시아 클링커와 천연산 마그네시아 클링커가 있는데, 본 발명에서는 MgO성분을 95중량%이상 함유한 것이면 어느 것을 사용하더라도 무방하다. 이러한 마그네시아클링커의 함량이 50중량% 미만이 되면 융점이 저하하여 침식이 너무 심하게 되고, 60중량%를 초과하면 융점이 너무 높아서 소결이 잘 되지 않아 강도가 저하되고 침식이 심해지기도 한다.The magnesia clinker includes sea-sintered magnesia clinker and natural magnesia clinker. In the present invention, any one containing 95% by weight or more of MgO component may be used. When the content of the magnesia clinker is less than 50% by weight, the melting point is lowered and the erosion is too severe. When the content of the magnesia clinker is more than 60% by weight, the melting point is too high, so that the sintering is not good and the strength is reduced and the erosion is severe.

상기 다공성 마그네시아는 경량이면서, 원료자체가 다공체이므로 비금속개재물과 반응성이 좋고, 반응후에는 쉽게 부상, 분리가 가능한 효과를 발휘한다. 그 함유량이 10중량%미만에서는 다공성 원료의 사용량이 적으므로 비금속개재물의 포집에 효과가 없고, 25중량%를 초과하면 다공성원료의 사용이 과다하여 지나치게 강도가 저하하므로 취약해져 댐블록의 역할에 문제가 생긴다. 따라서, 본 발명에서는 다공성 마그네시아의 함량을 10-25중량%로 한정하는 것이 바람직하다.Since the porous magnesia is light and the raw material itself is a porous body, the porous magnesia exhibits good reactivity with non-metallic inclusions, and easily floats and separates after the reaction. If the content is less than 10% by weight, the amount of porous raw materials is small, which is not effective in collecting non-metallic inclusions. If the content is more than 25% by weight, the use of porous raw materials is excessive and the strength is excessively lowered. Occurs. Therefore, in the present invention, it is preferable to limit the content of the porous magnesia to 10-25% by weight.

상기 가연성 또는 휘발성 물질은 댐블록 사용중에 열에 의하여 소실되거나 휘발되어 기공을 형성하여 댐블록을 다공질화하는 역할을 한다. 그 함량이 10중량% 미만이 되면 고체량에 비하여 사용량이 부족하여 조직을 다공질화하는 효과가 적고, 20중량%를 초과하면 댐블록의 조직이 지나치게 다공질화되어 비금속개재물의 포집효과는 커지지만 강도가 저하하므로 침식이 매우 심해진다. 따라서, 본 발명에서는 가연성 또는 휘발성 물질의 함량을 10-20중량%로 한정하는 것이 바람직하다.The flammable or volatile material is lost or volatilized by heat during use of the dam block to form pores to serve to porousize the dam block. If the content is less than 10% by weight, the amount of use is insufficient compared to the amount of solids, so that the effect of porous tissue is small. If the content is more than 20% by weight, the structure of the dam block becomes too porous to increase the collection effect of nonmetallic inclusions, but the strength Erosion is very severe. Therefore, in the present invention, it is preferable to limit the content of flammable or volatile material to 10-20% by weight.

상기 가연성 또는 휘발성 물질로는 톱밥, 코크스입자, 나프탈렌 등을 들 수 있다. 이중에서 상기 코크스 입자는 사용중에 소실되어 기공을 제공하는 효과는 있으나 회분에 다량의 알카리성분을 함유하고 있으므로 댐블록의 융점을 저하시켜 침식을 촉진하므로 사용할 때 주의가 요망된다.Examples of the flammable or volatile substance include sawdust, coke particles, naphthalene, and the like. Of these, the coke particles are lost during use to provide pores, but since the ash contains a large amount of alkali components, the melting point of the dam block is lowered to promote erosion, so caution is required when using.

상기 황산마그네슘 또는 염화마그네슘은 댐블록에서 마그네시아 입자를 결합시키는 결합제로서 역할을 하며, 단독으로 사용하거나 혼합사용할 수 있다. 그 함량이 3중량% 미만에서는 첨가량이 부족하여 결합제로서의 역할을 제대로 못하고, 5중량%를 초과하면 첨가량의 과자로 댐블록의 제조과정에서 경시변화가 일어나 급속히 경화되어 버린다. 따라서, 본 발명에서는 황산마그네슘 또는 염화마그네슘의 단독 또는 복함의 함량을 3-5중량%로 한정하는 것이 바람직하다.The magnesium sulfate or magnesium chloride serves as a binder for binding the magnesia particles in the dam block, and may be used alone or in combination. If the content is less than 3% by weight, the amount of addition is insufficient to properly serve as a binder, and if the content is more than 5% by weight, the change over time occurs in the manufacturing process of the dam block with the added amount of confectionery and hardens rapidly. Therefore, in the present invention, it is preferable to limit the content of magnesium sulfate or magnesium chloride alone or complex to 3-5% by weight.

상기 금속 알루미늄은 발포성 물질로서 댐블록 제조시에 수분과 반응하여 수소가스를 방출하면서 기공을 형성하는 역할을 한다. 그 함량이 2중량%미만에서는 기공이 형성되어도 그 면적이 작아서 기공형성효과가 거의 없고, 5중량%를 초과하면 단시간에 수소가스 방출량이 많아 사용이 위험하고, 강도도 매우 작아져서 취급하기에도 부적당하고 침식이 심하므로 댐블록으로서의 역할을 하지 못한다. 따라서, 본 발명에서는 금속 알루미늄의 함량을 2-5중량%로 한정하는 것이 바람직하다.The metal aluminum is a foamable material and serves to form pores while releasing hydrogen gas by reacting with moisture during dam block manufacture. If the content is less than 2% by weight, even though the pores are formed, the area is small and there is almost no pore-forming effect. If the content is more than 5% by weight, hydrogen gas is discharged in a short time, so it is dangerous to use, and the strength is also very small. And erosion is severe, so it cannot act as a dam block. Therefore, in the present invention, it is preferable to limit the content of metal aluminum to 2-5% by weight.

상기 헥사메타인산소다는 분산제로의 역할을 한다. 그 함량이 1중량%미만에서는 원료의 분산효과가 적어 수순첨가량이 많아져 강도저하의 원인이 되며, 3중량%를 초과하면 원료의 응집현상이 발생하여 부적당하다. 따라서, 본 발명에서는 헥사메타인산소다의 함량을 1-3중량%로 한정하는 것이 바람직하다.The hexametaphosphate serves as a dispersant. If the content is less than 1% by weight, the dispersing effect of the raw material is small, and the amount of water addition is increased, which causes a decrease in strength. Therefore, in the present invention, it is preferable to limit the content of sodium hexametaphosphate to 1-3% by weight.

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 함량으로 각 성분을 평량, 혼련하여 혼합물을 제조하였다. 이들을 40×40×160mm의 크기의 형틀에 투입하여 110℃에서 24시간 건조한 후, 1450℃의 전기로에서 3시간 유지하여 시편을 제조하였다.Each component was weighed and kneaded in the same amount as in Table 1 to prepare a mixture. These were put into a mold having a size of 40 × 40 × 160 mm, dried at 110 ° C. for 24 hours, and then kept in an electric furnace at 1450 ° C. for 3 hours to prepare a specimen.

원료(wt%)시편Raw material (wt%) specimen 마그네시아클링커Magnesia clinker 다공성마그네시아Porous Magnesia 소결알루미나Sintered Alumina 납석Feldspar 알루미나시멘트Alumina cement 톱밥sawdust 금속Al분말Metal Al Powder 황산마그네슘Magnesium sulfate 헥사메타인산소다Hexametaphosphate 10-5mm10-5mm 5-3mm5-3mm 3-1mm3-1mm 1mm이하Less than 1mm 5-3mm5-3mm 3-1mm3-1mm 1mm이하Less than 1mm 발명예1Inventive Example 1 1010 1515 1313 2020 55 1010 1010 -- -- -- 1010 33 33 1One 발명예2Inventive Example 2 1010 1010 1010 2323 55 55 1010 -- -- -- 1010 33 33 1One 발명예3Inventive Example 3 1010 1515 1515 2020 55 -- 1010 -- -- -- 1515 44 44 22 발명예4Inventive Example 4 1010 1010 1515 2020 -- 1010 1010 -- -- -- 1515 44 44 22 발명예5Inventive Example 5 55 1515 1010 2020 33 66 88 -- -- -- 2020 55 55 33 발명예6Inventive Example 6 55 1515 1515 1515 33 77 77 -- -- -- 2020 55 55 33 비교예1Comparative Example 1 55 1010 1515 1515 55 1010 1010 -- -- -- 2020 33 55 22 비교예2Comparative Example 2 1515 2020 1515 2020 -- 1010 -- -- -- -- 2020 33 55 22 비교예3Comparative Example 3 55 2020 1010 2525 -- 88 -- -- -- -- 2020 55 55 22 비교예4Comparative Example 4 55 1515 1515 1515 55 1010 1515 -- -- -- 1010 55 55 22 비교예5Comparative Example 5 55 2020 1010 2525 -- 1515 1010 -- -- -- 55 33 55 22 비교예6Comparative Example 6 55 1515 1010 2020 -- 1010 -- -- -- -- 3030 33 55 22 비교예7Comparative Example 7 55 1515 1515 2525 55 1010 55 -- -- -- 1515 33 -- 22 비교예8Comparative Example 8 1010 1515 1010 2020 -- 1010 55 -- -- -- 1515 33 1010 22 비교예9Comparative Example 9 1010 2020 1010 2020 55 1010 55 -- -- -- 1515 -- 33 22 비교예10Comparative Example 10 1010 1010 2020 2020 1010 55 -- -- -- -- 1010 99 33 33 비교예11Comparative Example 11 1010 1515 1515 2020 55 55 1010 -- -- -- 1515 22 33 -- 비교예12Comparative Example 12 1010 1010 1515 2525 -- 1010 1010 -- -- -- 1010 22 33 55 종래예Conventional example -- -- -- -- -- -- -- 6060 3030 1010 -- -- -- --

상기와 같은 조성을 갖는 시편들의 선변화율, 곡강도, 부피비중, 침윤성 및 시공성을 측정하여 그 결과를 하기 표2에 나타내었다. 이때, 상기 선변화율, 곡강도 및 부피비중은 각각 110℃×24Hr의 건조후와 1450℃×3Hr의 소성후의 시편에 대해 측정한 것이다. 또한, 상기 침윤성은 비금속개재물의 포집능을 판단할 수 있는 것으로, 산소-프로판가스를 열원으로 하는 회전침식시험기를 이용하여 1600℃의 온도에서 1시간 유지하고, 슬랙을 부어낸 후에 침식깊이와 침윤층 두께를 측정한 것이다. 또한, 상기 시공성은 물과 혼련된 원료를 형틀에 투입시 유동성, 경화상태 등을 양호(○), 불량(×)으로 판단하였다.The line change rate, bending strength, volume specific gravity, invasiveness and workability of the specimens having the composition as described above are shown in Table 2 below. In this case, the linear change rate, bending strength and volume specific gravity are measured for the specimens after drying at 110 ° C × 24Hr and after firing at 1450 ° C × 3Hr, respectively. In addition, the invasiveness is to determine the trapping ability of the non-metallic inclusions, by using a rotary erosion tester using oxygen-propane gas as a heat source for 1 hour at 1600 ℃, after the slack is poured erosion depth and infiltration The layer thickness is measured. In addition, the workability was judged as good (○), poor (×) when the raw material kneaded with water into the mold, fluidity, curing state and the like.

선변화율(%)Rate of change (%) 곡강도(kg/cm2)Bending strength (kg / cm 2 ) 부피비중Volume specific gravity 침식시험Erosion Test 시공성Constructability 110℃×24Hr110 ℃ × 24Hr 1450℃×3Hr1450 ℃ × 3Hr 110℃×24Hr110 ℃ × 24Hr 1450℃×3Hr1450 ℃ × 3Hr 110℃×24Hr110 ℃ × 24Hr 1450℃×3Hr1450 ℃ × 3Hr 침식깊이(mm)Erosion Depth (mm) 침윤층(mm)Infiltration layer (mm) 발명예1Inventive Example 1 -1.10-1.10 +1.50+1.50 4242 3535 2.402.40 1.901.90 4.54.5 8.08.0 ○○ 발명예2Inventive Example 2 -1.0-1.0 +2.30+2.30 4848 4040 2.452.45 1.851.85 4.04.0 8.58.5 ○○ 발명예3Inventive Example 3 -1.25-1.25 +2.0+2.0 4646 3939 2.452.45 1.871.87 4.14.1 9.09.0 ○○ 발명예4Inventive Example 4 -1.15-1.15 +2.15+2.15 4747 3939 2.322.32 1.951.95 4.94.9 9.59.5 ○○ 발명예5Inventive Example 5 -1.20-1.20 +2.08+2.08 4545 3838 2.372.37 1.831.83 4.954.95 8.48.4 ○○ 발명예6Inventive Example 6 -1.08-1.08 +2.0+2.0 4848 4848 2.342.34 1.751.75 4.844.84 8.88.8 ○○ 비교예1Comparative Example 1 -2.0-2.0 +3.25+3.25 3030 2121 2.602.60 2.302.30 6.856.85 3.53.5 ×× 비교예2Comparative Example 2 -2.58-2.58 +2.98+2.98 3131 1919 2.652.65 2.252.25 6.576.57 4.04.0 ×× 비교예3Comparative Example 3 -2.40-2.40 +3.31+3.31 3636 2727 2.652.65 2.282.28 6.406.40 2.802.80 ○○ 비교예4Comparative Example 4 -2.36-2.36 +3.31+3.31 2929 1919 2.642.64 1.801.80 9.29.2 5.85.8 ○○ 비교예5Comparative Example 5 -2.15-2.15 +3.46+3.46 3434 2525 2.552.55 2.342.34 6.06.0 3.23.2 ○○ 비교예6Comparative Example 6 -2.34-2.34 +3.20+3.20 2626 1515 2.332.33 1.751.75 10.010.0 3.53.5 ×× 비교예7Comparative Example 7 -2.28-2.28 +3.15+3.15 2525 1818 2.632.63 2.272.27 6.326.32 4.24.2 ×× 비교예8Comparative Example 8 -2.45-2.45 +3.16+3.16 3939 2626 2.592.59 2.352.35 6.286.28 3.83.8 ×× 비교예9Comparative Example 9 -2.32-2.32 +3.18+3.18 3232 2323 2.532.53 2.302.30 6.246.24 3.03.0 ○○ 비교예10Comparative Example 10 -2.30-2.30 +3.80+3.80 2424 1616 2.322.32 1.801.80 6.326.32 3.33.3 ×× 비교예11Comparative Example 11 -2.14-2.14 +3.65+3.65 3333 2323 2.652.65 2.302.30 6.576.57 3.53.5 ×× 비교예12Comparative Example 12 -2.38-2.38 +3.54+3.54 3434 2525 2.632.63 2.372.37 6.856.85 3.63.6 ×× 종래예Conventional example -1.15-1.15 +1.25+1.25 3535 5050 2.702.70 2.552.55 5.755.75 2.82.8 ○○

상기 표2에서 알 수 있는 바와같이, 본 발명의 조건을 만족하는 발명예(1-6)은 선변화율, 곡강도, 부피비중, 침윤성 및 시공성이 종래예에 비하여 동등이상으로 우수하였다.As can be seen in Table 2, Inventive Example (1-6), which satisfies the conditions of the present invention, was excellent in line change rate, bending strength, volume specific gravity, invasiveness and workability more than equivalent to the conventional example.

이에 반하여, 마그네시아 클링커의 사용량이 본 발명의 범위보다 적은 비교예(1)은 융점이 낮고 침식이 심하였다.On the contrary, Comparative Example (1) in which the amount of magnesia clinker was less than the range of the present invention had a low melting point and severe erosion.

또한, 비교예(2)는 마그네시아 클링커의 사용량이 본 발명의 범위보다 많은 경우로, 전체적으로 볼 때 골재량이 많아서 소결이 잘 되지 않아 고온강도가 매우 작고, 침식도 심하였다.In addition, Comparative Example (2) is a case where the amount of magnesia clinker is used more than the range of the present invention, as a whole, the aggregate amount is large, the sintering is not good, so the high temperature strength is very small, and the erosion was severe.

또한, 비교예(3)은 다공성 마그네시아의 사용량이 본 발명의 범위보다 적은 경우로서, 강도는 커졌으나 댐블록 내화물조직이 치밀하여 부피비중이 컸으며 침윤층 두께도 얇았다.In addition, Comparative Example (3) is a case where the amount of porous magnesia is less than the range of the present invention, the strength is increased, but the dam block refractory structure is dense, the volume specific gravity was large, and the thickness of the infiltrating layer was also thin.

또한, 비교예(4)는 다공성 마그네시아의 사용량이 본 발명의 범위보다 많은 경우로서, 내화물조직이 다공질이기 때문에 강도가 작고, 침윤층은 두터웠으나 침식이 매우 심하여 사용이 부적당하였다.In addition, Comparative Example (4) is a case where the amount of the porous magnesia is more than the range of the present invention, the strength is small because the refractory structure is porous, the infiltration layer was thick, but the erosion was very severe, it was inappropriate to use.

또한, 비교예(5)는 톱밥의 사용량이 본 발명의 범위보다 적은 경우로서, 내화물조직이 다공성이 되지 못하고 치밀하여 부피비중이 크고, 침윤층도 얇았다.In addition, in Comparative Example (5), when the amount of sawdust used was less than the range of the present invention, the refractory structure was not porous and was dense so that the volume specific gravity was large and the infiltrating layer was also thin.

또한, 비교예(6)은 톱밥의 사용량이 본 발명의 범위보다 많은 경우로서, 내화물조직이 다공성이고 부피비중도 작아서 침윤층 두께도 두터웠으나 강도가 낮고 침식도 심하여 사용에는 부적당하였다.In addition, Comparative Example (6) is a case where the amount of sawdust is used more than the range of the present invention, the refractory structure is porous and the volume specific gravity is thick, but the thickness of the infiltrating layer is low, but the strength is low and erosion is not suitable for use.

또한, 비교예(7)은 황산마그네슘의 사용량이 본 발명의 범위보다 적은 경우로서, 골재량에 비해 결합제의 양이 소량이기 때문에 강도가 매우 작아 사용에 부적당하였다.In addition, Comparative Example (7) was used when the amount of magnesium sulfate was less than the range of the present invention, and the strength was very small because the amount of the binder was small compared to the amount of aggregate.

또한, 비교예(8)은 황산마그네슘의 사용량이 본 발명의 범위보다 많은 경우로서, 결합강도는 컸으나 댐블록의 제조과정에서 급속경화현상이 일어나기 때문에 부적당하였다.In addition, in Comparative Example (8), the amount of magnesium sulfate used was larger than the range of the present invention, and the bonding strength was large, but it was not suitable because rapid curing occurred in the manufacturing process of the dam block.

또한, 비교예(9)는 금속알루미늄의 사용량이 본 발명의 범위보다 적은 경우로서, 발포제로서 역할을 하는 금속알루미늄의 사용량이 소량이기 때문에 톱밥만으로는 충분히 다공체가 되지 못하여 사용에 부적당하였다.In addition, in Comparative Example (9), when the amount of the metal aluminum used is less than the range of the present invention, since the amount of the metal aluminum serving as the foaming agent is small, sawdust alone does not become a porous body and is not suitable for use.

또한, 비교예(10)은 금속알루미늄의 사용량이 본 발명의 범위보다 많은 경우로서, 지나체게 다공체가 되어 강도가 작고 침식이 매우 심하여 사용에 부적당하였다.In addition, Comparative Example 10 is a case where the amount of the metal aluminum used is more than the range of the present invention, it is excessively porous, small strength and very erosion was unsuitable for use.

또한, 비교예(11)은 헥사메타인산소다의 사용량이 본 발명의 범위보다 적은 경우로서, 원료의 분산이 잘 되지 않아 시공성이 불량하였다.In addition, the comparative example (11) is a case where the usage-amount of hexametha phosphate is less than the range of this invention, and dispersion | distribution of a raw material was not good, and the workability was poor.

또한, 비교예(12)는 헥사메타인산소다의 사용량이 본 발명의 범위보다 많은 경우로서, 댐블록의 제조과정에서 급속경화가 일어나 사용에 부적당하였다.In addition, Comparative Example (12) is a case where the amount of the hexametaphosphate used is more than the range of the present invention, the rapid curing occurs in the manufacturing process of the dam block was unsuitable for use.

상기한 바와같이, 본 발명은 다공성 마그네시아, 가연성물질 및 발포성물질을 댐블록 내화조성물에 적용함으로써, 경량이면서 다공체 조직으로 형성된 댐블록을 얻을 수 있고, 얻어진 댐블록은 내부로 비금속개재물의 침투를 촉진시켜 비금속개재물의 포집량을 증가시키는 효과가 있다.As described above, in the present invention, by applying porous magnesia, combustible material and foamable material to the dam block refractory composition, a dam block formed of a lightweight and porous structure can be obtained, and the obtained dam block promotes penetration of non-metallic inclusions therein. It has the effect of increasing the amount of non-metallic inclusions.

Claims (2)

댐블록 내화조성물에 있어서,In the dam block refractory composition, MgO성분을 95중량%이상 함유하는 마그네시아 클링커:50-60중량%, 다공성 마그네시아:10-25중량%, 가연성 또는 휘발성물질:10-20중량%, 금속 알루미늄:2-5중량%, 헥사메타인산소다:1-3중량%와 여기에, 황산마그네슘과 염화마그네슘을 단독 또는 복합으로 3-5중량% 포함시켜 조성되는 염기성 댐블록 내화조성물Magnesia clinker containing 95% or more by weight of MgO component: 50-60% by weight, porous magnesia: 10-25% by weight, flammable or volatile substance: 10-20% by weight, metal aluminum: 2-5% by weight, hexamethic acid Soda: 1-3 wt% and basic dam block refractory composition comprising 3-5 wt% of magnesium sulfate and magnesium chloride alone or in combination 제 1 항에 있어서,The method of claim 1, 상기 가연성 또는 휘발성물질은 톱밥, 코크스 입자, 나프탈렌 중에서 선택된 것임을 특징으로 하는 염기성 댐블록 내화조성물The flammable or volatile substance is a basic dam block refractory composition, characterized in that selected from sawdust, coke particles, naphthalene
KR1019970060758A 1997-11-18 1997-11-18 Basic dam block refractory composition KR100328048B1 (en)

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KR1019970060758A KR100328048B1 (en) 1997-11-18 1997-11-18 Basic dam block refractory composition

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WO2008091041A1 (en) 2007-01-26 2008-07-31 Wonjin Worldwide Co., Ltd. Carbon-containing refractory composition containing no resinous binder

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