KR101087203B1 - Castable for permanent lining of laddle using wasted refractory - Google Patents

Castable for permanent lining of laddle using wasted refractory Download PDF

Info

Publication number
KR101087203B1
KR101087203B1 KR20100017493A KR20100017493A KR101087203B1 KR 101087203 B1 KR101087203 B1 KR 101087203B1 KR 20100017493 A KR20100017493 A KR 20100017493A KR 20100017493 A KR20100017493 A KR 20100017493A KR 101087203 B1 KR101087203 B1 KR 101087203B1
Authority
KR
South Korea
Prior art keywords
weight
castable
waste
alumina
refractory
Prior art date
Application number
KR20100017493A
Other languages
Korean (ko)
Other versions
KR20110098069A (en
Inventor
이만식
최홍성
Original Assignee
현대제철 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대제철 주식회사 filed Critical 현대제철 주식회사
Priority to KR20100017493A priority Critical patent/KR101087203B1/en
Publication of KR20110098069A publication Critical patent/KR20110098069A/en
Application granted granted Critical
Publication of KR101087203B1 publication Critical patent/KR101087203B1/en

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • 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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5212—Organic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • 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)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

본 발명은 알루미나-탄소계 폐내화물 0 초과 90 중량% 이하와, CA-18 폐내화물 0 초과 90 중량% 이하와, 용융알루미나 5 내지 10 중량%와, 실리카 0 초과 5 중량% 이하를 포함하는, 폐내화물을 이용한 래들 영구장용 캐스타블을 제공한다. The present invention comprises alumina-carbon-based waste refractories greater than 0 and 90 wt% or less, CA-18 waste refractory greater than 0 and 90 wt% or less, fused alumina 5-10 wt% and silica greater than 0 and 5 wt% or less, It provides a ladle permanent castable using waste refractories.

Description

폐내화물을 이용한 래들 영구장용 캐스타블{CASTABLE FOR PERMANENT LINING OF LADDLE USING WASTED REFRACTORY}CASTABLE FOR PERMANENT LINING OF LADDLE USING WASTED REFRACTORY}

본 발명은 래들의 영구장에 사용하기 위하여 폐내화물을 이용하여 제조된 캐스타블에 관한 것이다.
The present invention relates to a castable made using waste refractories for use in a permanent field of ladle.

일반적으로 제철공정에서는 전로, 래들, 턴디쉬, RH설비 등과 같은 용강을 수용하는 용기들이 설치된다. 이들 용기들에는 뜨거운 용강으로부터 용기를 보호하기 위하여 내화재들이 내장된다. Generally, in the steelmaking process, vessels for receiving molten steel such as converters, ladles, tundish, and RH facilities are installed. These vessels contain refractory materials to protect the vessel from hot molten steel.

내화재로는, 통상 마그네시아-탄소(MgO-C)계 연와, 알루미나(Al203)-스피넬질 유입재, 알루미나-실리카(SiO2)질 유입재, 마그네시아계 연와, 마그네시아-산화크롬(MgO-Cr2O3)계 연와 등 각종 내화물이 사용되고 있다.Refractory materials are usually magnesia-carbon (MgO-C) -based lead, alumina (Al 2 0 3 ) -spinel inlet, alumina-silica (SiO 2 ) -inlet, magnesia-based lead, and magnesia-chromium oxide (MgO -Cr there are various refractory material being used, such as 2 O 3) based kite.

상기 내화물은 일정기간 사용하면 그 수명이 다하는 관계로 새로운 내화물로 교체를 해야 하는데, 이때 처리해야 하는 폐내화물이 다량으로 발생한다.The refractory should be replaced with a new refractory due to the end of its useful life if used for a certain period of time, a large amount of waste refractory to be processed occurs.

통상 이러한 폐내화물의 대부분은 매립장에 매립하여 처리하는 것이 일반적이다.
Usually, most of these waste refractories are disposed of in landfills and treated.

본 발명의 목적은 전로, 래들, 턴디쉬 등의 내화물 교체 시에 발생되는 폐내화물을 재활용하여 래들 영구장용으로 적합한 캐스타블을 제공하는 것이다.
It is an object of the present invention to provide a castable suitable for ladle permanent field by recycling waste refractories generated upon refractories replacement such as converters, ladles, tundishes and the like.

상기한 과제를 실현하기 위한 본 발명의 일 실시예와 관련된 폐내화물을 이용한 래들 영구장용 캐스타블은, 알루미나-탄소계 폐내화물 0 초과 90 중량% 이하와, CA-18 폐내화물 0 초과 90 중량% 이하와, 용융알루미나 5 내지 10 중량%와, 실리카 0 초과 5 중량% 이하를 포함한다.The permanent ladle castable ladle using waste refractories in accordance with an embodiment of the present invention for realizing the above problems, more than 0 to 90% by weight of alumina-carbon waste refractories, and more than 0 to 90% by weight of CA-18 waste refractories % Or less, fused alumina 5 to 10% by weight, and silica greater than 0 and 5% by weight or less.

비닐 화이바 0.1 내지 1 중량%를 더 포함될 수 있다.Vinyl fiber may further comprise 0.1 to 1% by weight.

리그닌산 0.1 내지 1 중량%를 더 포함될 수 있다.Ligninic acid may further comprise 0.1 to 1% by weight.

상기 알루미나-탄소계 폐내화물 및 상기 CA-18계 폐내화물 중 적어도 하나는 1mm 이하의 입도를 가질 수 있다.At least one of the alumina-carbon waste refractories and the CA-18 waste refractories may have a particle size of 1 mm or less.

상기 용융알루미나는 0.3mm 이하의 입도를 가질 수 있다.
The molten alumina may have a particle size of 0.3 mm or less.

상기와 같이 구성되는 본 발명에 관련된 폐내화물을 이용한 래들 영구장용 캐스타블은 버려지는 폐내화물을 재활용하여 사용할 수 있게 함으로써 자원을 절약하고 제강 공정의 경제성을 높일 수 있게 한다.The permanent ladle castable ladle using waste refractories according to the present invention configured as described above can be used by recycling the waste refractories discarded to save resources and increase the economics of the steelmaking process.

또한, 래들 영구장용 캐스타블은 용강과 직접 접촉하지 않으므로, 폐내화물을 재활용한 것으로도 요구되는 품질을 만족시킬 수 있게 된다.
In addition, since the ladle permanent castable is not in direct contact with molten steel, it is possible to satisfy the required quality even by recycling waste refractories.

도 1은 비교예와 본 발명에 따른 발명예를 흙손 시공한 상태를 보인 대비 사진이고,
도 2는 도 1의 비교예 및 발명예를 가열한 상태를 보인 대비 사진이며,
도 3은 비교예와 발명예가 각각 접착된 블록 조립체의 가열 전 모습을 보인 대비 사진이고,
도 4는 도 3의 블록 조립체에 대한 가열 후 상태를 보인 대비 사진이다.1 is a comparison picture showing a state in which the trowel construction of the invention example according to the comparative example and the present invention,
2 is a contrast photograph showing a state in which the comparative example and the invention example of FIG. 1 are heated,
Figure 3 is a comparison picture showing a state before heating the block assembly bonded to the comparative example and the invention example, respectively,
4 is a contrast picture showing a state after heating of the block assembly of FIG.

이하, 본 발명의 바람직한 실시예에 따른 폐내화물을 이용한 래들 영구장용 캐스타블에 대하여 첨부한 도면을 참조하여 상세히 설명한다. Hereinafter, with reference to the accompanying drawings for a ladle permanent long castable using waste refractory according to a preferred embodiment of the present invention will be described in detail.

내화물은 고온에 견디는 물질로, 적어도 1,000℃ 이상 고온에서 연화(軟化)하지 않고 그 강도를 충분히 유지하며, 화학적 작용 등에도 견딜 수 있는 재료이다. A refractory material is a material which withstands high temperature, it is a material which does not soften at the high temperature at least 1,000 degreeC or more, maintains its strength sufficiently, and can also resist chemical effects.

전기로나 래들, 턴디쉬 등에 사용되는 내화물은 영구장과 소모장으로 구분된다. 소모장은 내장내화물(Working lining)이라고도 하며, 용강과 집접 접촉하도록 로의 내부 표면에 부착된다. 영구장(Permanent lining)은 소모장에 의해 보호되거나 그렇지 않더라도 용강과 접촉되지는 않는 위치에 부착된다. 따라서, 영구장에 대해 요구되는 성능은 소모장에 대한 요구만큼 엄격하지 않으며, 소모장 보다 오래도록 사용될 수 있다.Refractories used in electric furnaces, ladles, tundish, etc. are divided into permanent and consumption fields. Consumables are also called working linings and are attached to the inner surface of the furnace in direct contact with molten steel. Permanent linings are attached to positions that are either protected by the spent field or otherwise not in contact with the molten steel. Therefore, the performance required for permanent fields is not as stringent as the demand for waste fields, and can be used longer than the waste fields.

캐스타블은 내화성 골재와 수경 시멘트 또는 화학적 결합재를 혼합한 내화물로서, 유입 시공후 일정시간 경과 후 경화하여 구조물을 형성하는 내화물이다.Castable is a refractory material that mixes a refractory aggregate and hydraulic cement or a chemical binder, and is a refractory that cures after a predetermined time after the inlet construction to form a structure.

본 발명의 일 실시예에 따른 폐내화물을 이용한 래들 영구장용 캐스타블은 알루미나-탄소계 폐내화물과, CA-18 폐내화물과, 용융알루미나와, 실리카를 포함한다.The permanent ladle castable ladle using waste refractories according to an embodiment of the present invention includes alumina-carbon waste refractories, CA-18 waste refractories, fused alumina, and silica.

상기 알루미나-탄소계 폐내화물은 구성 성분은 사용 전의 내화물 구성에 따라 다소 변동될 수 있다. 또한, 폐내화물의 기존 특성에 따라 분쇄될 때의 입도를 달리 결정하게 된다. 그에 따라, 알루미나-탄소계 폐내화물은 대체로 입도 1mm 이상의 경우에 알루미나(Al2O3) 83중량%, 실리카(SiO2) 8.4중량%, 마그네시아(MgO) 0.7중량%, 산화칼슘(CaO) 0.8중량%, 삼이산화철(Fe203) 0.8중량% 등을 함유한다. 입도가 1mm 이하이면, 알루미나-탄소계 폐내화물은 대체로 알루미나 78중량%, 실리카 11중량%, 마그네시아 1.6중량%, 산화칼슘 1.1중량%, 삼이산화철 1.0중량% 등을 함유한다.The alumina-carbon waste refractories may vary somewhat depending on the composition of the refractory before use. In addition, the particle size at the time of grinding is determined differently according to the existing characteristics of the waste refractory. Accordingly, alumina-carbon waste refractories are generally 83% by weight of alumina (Al 2 O 3 ), 8.4% by weight of silica (SiO 2 ), 0.7% by weight of magnesia (MgO), and calcium oxide (CaO) at a particle size of 1 mm or more. % By weight, 0.8% by weight of iron trioxide (Fe 2 O 3 ), and the like. If the particle size is 1 mm or less, the alumina-carbon waste refractory generally contains 78% by weight of alumina, 11% by weight of silica, 1.6% by weight of magnesia, 1.1% by weight of calcium oxide, 1.0% by weight of trioxide, and the like.

상기 CA-18 폐내화물은 입도 1mm 이상의 경우에 대체로 알루미나 87중량%, 실리카 6.1중량%, 마그네시아 0.6중량%, 산화칼슘 2.5중량%, 삼이산화철 0.4중량% 등을 함유한다. 입도가 1mm 이하이면, 대체로 알루미나 86.4중량%, 실리카 6.2중량%, 마그네시아 0.8중량%, 산화칼슘 3.5중량%, 삼이산화철 0.6중량% 등을 함유한다.The CA-18 waste refractories generally contain 87% by weight of alumina, 6.1% by weight of silica, 0.6% by weight of magnesia, 2.5% by weight of calcium oxide, 0.4% by weight of trioxide, and the like when the particle size is 1 mm or more. When the particle size is 1 mm or less, it generally contains 86.4% by weight of alumina, 6.2% by weight of silica, 0.8% by weight of magnesia, 3.5% by weight of calcium oxide, 0.6% by weight of iron trioxide, and the like.

알루미나-탄소계 폐내화물과 CA-18 폐내화물의 함량은 제강 공정에서 발생되는 양에 따라 달라질 수 있다. 구체적으로, 알루미나-탄소계 폐내화물은 0 초과 90 중량% 이하로 포함되고, CA-18 폐내화물 0 초과 90 중량% 이하로 포함될 수 있다. 상기 알루미나-탄소계 폐내화물과 상기 CA-18 폐내화물은 본 발명에 따른 캐스타블의 대부분을 차지하는 성분으로서, 그 합이 90 중량% 수준에까지 이르게 된다. The content of alumina-carbon waste refractories and CA-18 waste refractories may vary depending on the amount generated in the steelmaking process. Specifically, the alumina-carbon waste refractories may be included in an amount of more than 0 and 90 wt% or less, and in the CA-18 waste refractories and more than 0 and 90 wt% or less. The alumina-carbon waste refractories and the CA-18 waste refractories constitute the majority of the castable according to the present invention, and the sum thereof reaches 90% by weight.

상기 용융알루미나는 캐스타블의 내화도를 유지하기 위하여 첨가된다. 구체적으로, 상기 용융알루미나는 5 내지 10 중량% 수준에서 첨가될 수 있다. 상기 용융알루미나가 10 중량% 이상 첨가되면, 캐스타블의 내화도나 내침식성이 비례하여 향상된다. 그러나, 본 발명에 따른 캐스타블이 래드 영구장용으로 사용될 것임을 감안하면, 상기 용융알루미나가 10 중량% 이상 첨가되는 것은 큰 의미가 없으며 경제성만 나쁘게 한다.The molten alumina is added to maintain the fire resistance of the castable. Specifically, the molten alumina may be added at a level of 5 to 10% by weight. When the molten alumina is added at least 10% by weight, the fire resistance and erosion resistance of the castable are improved in proportion. However, considering that the castable according to the present invention will be used for a permanent rod, it is not significant that the molten alumina is added in an amount of 10% by weight or more, and the economic efficiency is bad.

상기 실리카는 부착력을 증대시키고 강도를 유지하기 위해 사용된다. 구체적으로, 상기 실리카는 0 초과 5 중량% 이하로 포함된다. 상기 실리카가 5 중량% 이상이면 오히려 작업성이 저하되고 융점이 낮아지는 문제가 있다.The silica is used to increase adhesion and maintain strength. Specifically, the silica is included in more than 0 5% by weight or less. If the silica is 5% by weight or more, there is a problem that the workability is lowered and the melting point is lowered.

상기 알루미나-탄소계 폐내화물 및 상기 CA-18계 폐내화물 중 적어도 하나는 1mm 이하의 입도를 가질 수 있다. 상기 용융알루미나는 0.3mm 이하의 입도를 가질 수 있다. 입도가 높으면 내침식성은 향상되나, 기계적 강도는 저하될 수 있다. 따라서, 캐스타블이 사용될 환경을 고려하여 폐내화물의 입도를 결정할 수 있다. At least one of the alumina-carbon waste refractories and the CA-18 waste refractories may have a particle size of 1 mm or less. The molten alumina may have a particle size of 0.3 mm or less. Higher particle sizes improve erosion resistance, but may lower mechanical strength. Thus, the particle size of the waste refractory can be determined in consideration of the environment in which the castable is to be used.

상기 래들 영구장용 캐스타블은 비닐 화이바 0.1 내지 1 중량%와, 리그닌산 0.1 내지 1 중량%를 더 포함할 수 있다. 비닐 화이바는 캐스타블 내에서 수분기로를 확보하게 하며, 폭열을 방지하고 단열성을 높인다. 상기 비닐 화이바는 1 중량% 이상이면 내침식성 및 부착성을 저하시키는 문제가 있다. 상기 리그닌산은 점성제로서 추가되며, 1 중량% 이상이면 캐스타블의 경화가 너무 빨리 진행되게 하는 문제가 있다.The ladle permanent castable may further include 0.1 to 1% by weight of vinyl fiber and 0.1 to 1% by weight of lignin acid. The vinyl fiber ensures moisture in the castable, prevents thermal expansion and improves thermal insulation. If the vinyl fiber is 1% by weight or more, there is a problem of lowering erosion resistance and adhesion. The lignic acid is added as a viscous agent, if there is more than 1% by weight there is a problem that the curing of the castable proceeds too fast.

다음으로 본 발명자가 발명예를 비교예와 대비하여 시험한 결과에 대하여 설명하기로 한다.Next, the result of the inventor testing the invention example in comparison with the comparative example will be described.

비교예는 마그네시아로 이루어진 캐스타블이고, 발명예는 알루미나-탄소계 폐내화물이 50 중량%와 CA-18 폐내화물 40 중량%를 포함한다. 발명예는 용융 알루미나 7 중량%와, 실리카 2 중량%, 비닐 화이바 0.5 중량%, 그리고 리그닌산 0.5 중량%를 포함한다. A comparative example is a castable made of magnesia, and the invention includes 50 wt% of alumina-carbon waste refractory and 40 wt% of CA-18 waste refractory. Examples include 7% by weight of fused alumina, 2% by weight of silica, 0.5% by weight of vinyl fiber, and 0.5% by weight of lignic acid.

먼저, 시공성 면에서, 발명예와 비교예를 도 1 및 도 2를 참조하여 대비 설명한다.First, in terms of workability, the invention and the comparative example will be described with reference to FIGS. 1 and 2.

도 1은 비교예와 본 발명에 따른 발명예를 흙손 시공한 상태를 보인 대비 사진이고, 도 2는 도 1의 비교예 및 발명예를 가열한 상태를 보인 대비 사진이다. 1 is a contrast picture showing a state in which the trowel construction of the comparative example and the invention example according to the present invention, Figure 2 is a contrast picture showing a heating state of the comparative example and the invention example of FIG.

도 1 및 2를 참조하면, 비교예 및 발명예에 따른 캐스타블은 혼련 후 래들의 벽체에 일정량 흙손으로 아래에서 위로 부착된다. 그리고, 시공한 부분에 가해진 열에 의해 1200℃로 가열된다. 1 and 2, the castable according to the comparative example and the invention is attached from the bottom up with a certain amount of trowel to the wall of the ladle after kneading. And it heats to 1200 degreeC by the heat added to the constructed part.

이러한 시험 후의 표면 상태를 살펴보면, 첨가수분은 비교예가 22%임에 비하여 발명예에서는 24%로 2% 가량 증가함을 알 수 있었다. 그러나, 본 발명에 따른 캐스타블이 용강과 접촉하는 곳에 사용되는 것이 아니므로, 약간의 수분 증가가 큰 문제가 되는 것은 아니다.Looking at the surface state after such a test, it can be seen that the added moisture is increased by about 2% to 24% in the invention example, while the comparative example is 22%. However, since the castable according to the present invention is not used in contact with molten steel, slight increase in moisture is not a big problem.

가사시간(경화시간)은 비교예가 2시간이나 발명예는 1.5 시간으로 측정된다. 이로부터 발명예에 의한 캐스타블은 비교예에 대비하여 25% 정도의 경화 시간 단축을 달성할 수 있게 함을 알 수 있다.Pot life (curing time) is measured for 2 hours in the comparative example but 1.5 hours in the invention. From this it can be seen that the castable according to the invention example can achieve a reduction in curing time of about 25% compared to the comparative example.

전반적으로 발명예는, 시공성 면에서, 현재 사용되고 있는 비교예에 비하여 동등한 성능을 발휘하고 있음을 알 수 있다.In general, it can be seen that the invention example exhibits the same performance as the comparative example currently used in view of workability.

도 3 및 도 4를 참조하여서 접착성에 대하여 비교예와 발명예를 대비해 본다. 도 3은 비교예와 발명예가 각각 접착된 블록 조립체의 가열 전 모습을 보인 대비 사진이고, 도 4는 도 3의 블록 조립체에 대한 가열 후 상태를 보인 대비 사진이다.With reference to FIGS. 3 and 4 contrast with respect to the comparative example and the invention example. 3 is a contrast picture showing the comparative example and the invention example before the heating of the bonded block assembly, respectively, Figure 4 is a contrast picture showing a state after heating for the block assembly of FIG.

도 3을 참조하면, 블록들 사이에는 각각 비교예와 발명예에 따른 캐스타블이 접착된다. 블록 조립체는 1200℃까지 가열된 후에 냉각된다.Referring to FIG. 3, castables according to Comparative Examples and Inventive Examples are bonded between blocks. The block assembly is heated to 1200 ° C. and then cooled.

도 4를 참조하면, 블록 조립체를 이루는 두 개의 벽돌들이 서로에 대하여 분리된다. 각 벽돌의 표면에 남아 있는 비교예와 발명예의 접착 상태를 비교한다.Referring to FIG. 4, two bricks forming the block assembly are separated with respect to each other. The adhesion state of the comparative example and the invention example which remain on the surface of each brick is compared.

블록 조립체를 분리하는 중에 비교예와 발명예를 사용한 경우들에서의 분리성은 거의 동등했다. 또한 발명예에서 과소결 현상은 없었으며, 블록과의 접착 상태는 비교예와 동등한 수준이였다.
The separability in the cases of using the comparative example and the invention example during the separation of the block assembly was almost equivalent. Moreover, there was no oversintering phenomenon in the invention example, and the adhesive state with the block was the same level as the comparative example.

이하 표 1을 참조하여 비교예와 발명예의 대표적인 주요 성분과 정량적인 특징에 대하여 살펴본다.Below with reference to Table 1 looks at the representative main components and quantitative characteristics of Comparative Examples and Examples.

비교예Comparative example 발명예Inventive Example
화학 성분
(중량%)
Chemical composition
(weight%) MgOMgO 8282 -- Al2O3 Al 2 O 3 -- 62.462.4 SiO2 SiO 2 66 26.426.4 선변화율(%)Rate of change (%) 1200℃1200 ℃ -1.2-1.2 -0.5-0.5 곡강도
(kg/㎠)Bending strength
(kg / ㎠) 110℃110 ℃ 33 55 1200℃1200 ℃ 88 1414 압축강도
(kg/㎠)Compressive strength
(kg / ㎠) 110℃110 ℃ 1010 1818 1200℃1200 ℃ 3030 4242

위 표에서 알 수 있는 바와 같이, 현재 사용되는 비교예는 마그네시아가 주 성분이나, 발명예는 알루미나와 실리카가 주성분을 이룬다.As can be seen from the above table, the comparative example currently used is magnesia as the main component, but the invention example is composed of alumina and silica as the main component.

발명예의 선변화율은 비교예의 선변화율보다 크다. 곡강도의 면에서, 발명예의 강도가 비교예의 강도 보다 높다. 이는 저온(110℃)과 고온(1200℃) 모두에서 동일하다. 압축 강도 역시 발명예의 것이 비교예 보다 30~40% 가량 향상된 값임을 알 수 있다.The line change rate of the invention example is larger than the line change rate of the comparative example. In terms of bending strength, the strength of the invention example is higher than that of the comparative example. This is the same at both low temperature (110 ° C.) and high temperature (1200 ° C.). Compressive strength can also be seen that the value of the invention of about 30 to 40% improved than the comparative example.

상기와 같은 폐내화물을 이용한 래들 영구장용 캐스타블은 위에서 설명된 실시예들의 구성과 작동 방식에 한정되는 것이 아니다. 상기 실시예들은 각 실시예들의 전부 또는 일부가 선택적으로 조합되어 다양한 변형이 이루어질 수 있도록 구성될 수도 있다. The ladle permanent field castable using the above-described waste refractories is not limited to the configuration and operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

Claims (5)

알루미나-탄소계 폐내화물 0 초과 90 중량% 이하와, CA-18 폐내화물 0 초과 90 중량% 이하와, 용융알루미나 5 내지 10 중량%와, 실리카 0 초과 5 중량% 이하를 포함하는, 폐내화물을 이용한 래들 영구장용 캐스타블.
Waste refractory materials comprising alumina-carbon based waste refractories greater than 0 and 90% by weight, CA-18 waste refractory greater than 0 and 90% by weight, molten alumina 5 to 10% by weight and silica greater than 0 and 5% by weight. Castable ladle permanent use.
제1항에 있어서,
비닐 화이바 0.1 내지 1 중량%를 더 포함하는, 폐내화물을 이용한 래들 영구장용 캐스타블.
The method of claim 1,
Permanent castable ladle using waste refractories, further comprising 0.1 to 1% by weight of vinyl fiber.
제1항에 있어서,
리그닌산 0.1 내지 1 중량%를 더 포함하는, 폐내화물을 이용한 래들 영구장용 캐스타블.
The method of claim 1,
The ladle for long lasting castables using waste refractories, further comprising 0.1 to 1% by weight lignin acid.
제1항에 있어서,
상기 알루미나-탄소계 폐내화물 및 상기 CA-18계 폐내화물 중 적어도 하나는 1mm 이하의 입도를 갖는, 폐내화물을 이용한 래들 영구장용 캐스타블.The method of claim 1,
At least one of the alumina-carbon waste refractories and the CA-18 waste refractories has a particle size of less than 1mm, permanent ladle castable ladle using waste refractories. 제1항에 있어서,
상기 용융알루미나는 0.3mm 이하의 입도를 갖는, 폐내화물을 이용한 래들 영구장용 캐스타블.The method of claim 1,
The molten alumina has a particle size of less than 0.3mm, castable for permanent ladle using waste refractory.
KR20100017493A 2010-02-26 2010-02-26 Castable for permanent lining of laddle using wasted refractory KR101087203B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20100017493A KR101087203B1 (en) 2010-02-26 2010-02-26 Castable for permanent lining of laddle using wasted refractory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20100017493A KR101087203B1 (en) 2010-02-26 2010-02-26 Castable for permanent lining of laddle using wasted refractory

Publications (2)

Publication Number Publication Date
KR20110098069A KR20110098069A (en) 2011-09-01
KR101087203B1 true KR101087203B1 (en) 2011-11-29

Family

ID=44951661

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20100017493A KR101087203B1 (en) 2010-02-26 2010-02-26 Castable for permanent lining of laddle using wasted refractory

Country Status (1)

Country Link
KR (1) KR101087203B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003137665A (en) 2001-11-02 2003-05-14 Toshiba Ceramics Co Ltd Method of producing castable refractory
KR100478141B1 (en) 2000-12-20 2005-03-22 재단법인 포항산업과학연구원 Injection repair composition for blast furnace by using spent refractories
JP2005179130A (en) 2003-12-19 2005-07-07 Kurosaki Harima Corp Monolithic refractory for wet spraying blended with used refractory

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100478141B1 (en) 2000-12-20 2005-03-22 재단법인 포항산업과학연구원 Injection repair composition for blast furnace by using spent refractories
JP2003137665A (en) 2001-11-02 2003-05-14 Toshiba Ceramics Co Ltd Method of producing castable refractory
JP2005179130A (en) 2003-12-19 2005-07-07 Kurosaki Harima Corp Monolithic refractory for wet spraying blended with used refractory

Also Published As

Publication number Publication date
KR20110098069A (en) 2011-09-01

Similar Documents

Publication Publication Date Title
CA2515337C (en) Crack-resistant dry refractory
JP6499464B2 (en) Insulated refractory
CN105801137B (en) A kind of melting reduction iron-making furnace Al2O3-Cr2O3Refractory material
JP5361795B2 (en) Lined casting material
KR101100269B1 (en) General castable for turn-dish using wasted refractory
CA2706152C (en) Fireproof ceramic mix, fireproof ceramic molded body formed of said mix and use thereof
JP2010280540A (en) Chromia-enriched castable refractory substance, and precast block using the same
KR100936163B1 (en) Refractories for industrial iron and steel
JP5712888B2 (en) Lined lining structure for steelmaking containers
JP6823042B2 (en) Precast block refractory for coke oven
KR101087203B1 (en) Castable for permanent lining of laddle using wasted refractory
CN114478031A (en) Production process of unburned aluminum-magnesia-carbon brick for electric furnace steel ladle
US10093576B2 (en) Unshaped refractory material
JP2014047128A (en) Monolithic refractory
JP4408552B2 (en) Alumina-magnesia castable refractories using magnesium carbonate as a magnesia source
KR100628972B1 (en) Refractory mending materials of Fused Silica
KR100373702B1 (en) Block Molding Using Alumina-Spinel Waste Castable
KR930011274B1 (en) Unshaped refractories of alumina-spinel
JP4811866B2 (en) Ramming material for inductor-type inductors in which a core is installed and sintered
JP6219764B2 (en) Lined casting material
JP2003002754A (en) Heat insulating castable refractory
JP2816585B2 (en) Method for producing refractory material containing magnesia
JP2016069219A (en) Alumina-magnesia casting material
JP2024011190A (en) Refractory brick and molten-metal container using the same
JP2013231592A (en) Construction method of monolithic refractory

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee