KR100468449B1 - Tap hole mix for blast furnace - Google Patents

Tap hole mix for blast furnace Download PDF

Info

Publication number
KR100468449B1
KR100468449B1 KR10-2000-0079226A KR20000079226A KR100468449B1 KR 100468449 B1 KR100468449 B1 KR 100468449B1 KR 20000079226 A KR20000079226 A KR 20000079226A KR 100468449 B1 KR100468449 B1 KR 100468449B1
Authority
KR
South Korea
Prior art keywords
blast furnace
alumina
refractory
silicon carbide
present
Prior art date
Application number
KR10-2000-0079226A
Other languages
Korean (ko)
Other versions
KR20020049902A (en
Inventor
김효준
Original Assignee
주식회사 포스코
재단법인 포항산업과학연구원
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 주식회사 포스코, 재단법인 포항산업과학연구원 filed Critical 주식회사 포스코
Priority to KR10-2000-0079226A priority Critical patent/KR100468449B1/en
Publication of KR20020049902A publication Critical patent/KR20020049902A/en
Application granted granted Critical
Publication of KR100468449B1 publication Critical patent/KR100468449B1/en

Links

Classifications

    • 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
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures

Landscapes

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

Abstract

고로 출선구 폐쇄용 내화재 조성물이 제공된다.A blast furnace composition for blast furnace closure is provided.

본 발명의 내화재 조성물은, 중량%로, 전융질 알루미나: 25-45%, 탄화규소 : 12-25%, 코크스: 5-9%, 점토: 7-12%, 알루미나-탄화규소-탄소계 폐내화물: 10-20%, 금속실리콘: 3-7%, 질화규소철: 6-10%, 붕사: 2-5%를 포함하여 조성된다.Refractory composition of the present invention, in weight percent, all-aluminum alumina: 25-45%, silicon carbide: 12-25%, coke: 5-9%, clay: 7-12%, alumina-silicon carbide-carbon waste It comprises a refractory: 10-20%, metal silicon: 3-7%, silicon nitride: 6-10%, borax: 2-5%.

본 발명은 고온안정성 및 내침식성이 우수한 고로 출선구 폐쇄용 내화재 조성물을 제공함으로써 개공시간이 단축, 출선시간 연장등에 유용한 효과가 있다.The present invention has a useful effect in shortening the opening time, extending the departure time by providing a refractory composition for blast furnace exit closure excellent in high temperature stability and corrosion resistance.

Description

고로 출선구 폐쇄용 내화재 조성물{Tap hole mix for blast furnace}Refractory composition for blast furnace exit closure {Tap hole mix for blast furnace}

본 발명은 고로 출선구의 폐쇄에 사용되는 내화재 조성물에 관한 것으로, 보다 상세하게는, 고로 출선구의 폐쇄에 적합한 내침식성이 우수할 뿐만 아니라 고온에서 용적안정성이 우수한 고로 출선구 폐쇄용 내화재 조성물에 관한 것이다.The present invention relates to a refractory composition used to close the blast furnace outlet, and more particularly, to a blast furnace outlet closure refractory composition for excellent erosion resistance suitable for closure of the blast furnace outlet and excellent in volume stability at high temperatures. It is about.

최근에 들어 용선의 대량생산을 위한 대형고로들이 출현되고 있음과 아울러, 고온, 고압조업으로 출선량 및 출선회수도 증가되고 있는 실정이다. 이에 따라, 고로 노황유지와 출선작업부하 저감을 위해 고로로부터 용선이 수시로 배출되는 출선구측에서의 내침식성 및 개공성이 우수한 내화물 개발이 요구되고 있다.Recently, large-scale blast furnaces for mass production of molten iron have emerged, and the amount of drawing and the number of drawing are increasing due to high temperature and high pressure operation. Accordingly, in order to maintain the blast furnace rust and reduce the work load, it is required to develop a refractory having excellent corrosion resistance and openness at the exit port where molten iron is frequently discharged from the blast furnace.

상기 내침식성 및 개공성확보을 위한 종래의 출선구 폐쇄용내화물에 관한 대표적인 예로서 일본 특허공개공보 99-29366와 특허공개공보 99-1374에 제시된 폐쇄용내화물을 들 수 있다.As a representative example of the conventional exit closure refractories for securing the erosion resistance and porosity, the closed refractory materials disclosed in Japanese Patent Application Laid-Open No. 99-29366 and Patent Publication No. 99-1374 are mentioned.

먼저, 상기 일본 특허공개공보 99-29366호에는 용선 및 슬랙에 대한 마모강도를 향상하여용적안정성과 조직 치밀화를 위하여 알루미나, 실리카, 탄화규소, 탄소, 질화물, 금속분말로 구성된 출선구폐쇄용 내화물을 제시하고 있다.First, Japanese Patent Application Laid-Open No. 99-29366 discloses a refractory for exit closure consisting of alumina, silica, silicon carbide, carbon, nitride, and metal powder in order to improve the wear strength of molten iron and slack, thereby increasing volume stability and densifying the structure. Suggesting.

그리고, 일본 특허공개공보 99-1374호는 내화골재, 탄소질원료, 점토와 바인더로서 석탄입자, 아민류 등과 같은 유기용제, 또는 석탄입자와 타르증류물로 구성된 출선구 폐쇄용내화물을 제공하여 조강성 및 내식성 향상을 꾀하고 있다.In addition, Japanese Patent Application Laid-Open No. 99-1374 provides refractory aggregates, carbonaceous raw materials, clay and binders as organic solvents such as coal particles, amines, or exit openings composed of coal particles and tar distillates. And to improve the corrosion resistance.

그러나 상기 특허공개공보에서는 종래의 출선구폐쇄용 내화물의 구비조건인 용선, 슬랙에 대한 내침식성 및 용적안정성 향상을 목적으로 하고 있으나, 고온에서의 용적안정성뿐만 아니라 출선말기에 슬랙에 의해 출선구의 확대가 일어나는 등 내침식성에 문제가 있다.However, the patent publication aims at improving the corrosion resistance and volume stability of molten iron and slag, which are the conditions for the conventional refractory closure closure, but not only the volume stability at high temperature but also the opening of the exit port due to slack at the end of the unloading. There is a problem in erosion resistance, such as enlargement.

따라서, 본 발명은 상술한 종래기술의 문제점을 해결하기 위한 것으로, 출선구 폐쇄용 내화물의 내침식성을 고려하여 침식에 강한 전융알루미나를 주원료로 하고, 여기에, 열간에서 폐쇄용 내화물의 잔존재질과 새로 충진한 재질간의 접착면에 생긴 균열부위로 용선이 침투함으로 야기되는 혈절(孔切)현상에 따른 개공성 저해문제를 해소하기 위하여 알루미나-탄화규소-카본 성분으로 구성되는 폐내화물을 첨가함으로써 고온 용적안정성이 우수할 뿐만 아니라 내침식성과 시공성도 우수한 고로 출선구 폐쇄용 내화재 조성물을 제공하는 것을 목적으로 한다.Therefore, the present invention is to solve the problems of the prior art described above, taking into account the erosion resistance of the outlet closing refractory, as the main raw material, the electrolytic alumina resistant to erosion, and the remaining material of the closing refractory in the hot In order to solve the problem of inhibition of porosity caused by the infiltration of molten iron into the crack formed on the adhesive surface between the newly filled materials, the waste refractory composed of alumina-silicon carbide-carbon component is added An object of the present invention is to provide a refractory composition for blast furnace exit closure that is excellent in volume stability as well as excellent in corrosion resistance and workability.

상기 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

중량%로, 전융질 알루미나: 25-45%, 탄화규소 : 12-25%, 코크스: 5-9%, 점토: 7-12%, 알루미나-탄화규소-탄소계 폐내화물: 10-20%, 금속실리콘: 3-7%, 질화규소철: 6-10%, 붕사: 2-5%를 포함하여 조성되는 고로 출선구 폐쇄용 내화재 조성물에 관한 것이다.In weight percent, all-fuel alumina: 25-45%, silicon carbide: 12-25%, coke: 5-9%, clay: 7-12%, alumina-silicon carbide-carbon waste refractories: 10-20%, It relates to a blast furnace opening closure composition comprising a metal silicon: 3-7%, silicon nitride: 6-10%, borax: 2-5%.

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

상기 알루미나로는 전융알루미나, 소결알루미나 등과 같은 고순도의 인공 합성원료와 천연의 보키사이트등이 사용될 수 있으나, 그 중에서도 결정입자가 조대한 전융알루미나가 내침식성에 있어서 효과적이다.As the alumina, artificial synthetic raw materials of high purity such as electrolytic alumina, sintered alumina, and natural voxite may be used. Among them, electrolytic alumina having coarse crystal grains is effective in corrosion resistance.

본 발명에서는 상기 알루미나의 사용량을 중량%(이하, 단지 %라 한다)로 25~45%로 제한함이 바람직한데, 이는 그 사용량이 25%미만에서는 내침식성이 저하되며, 45%를 초과하면 내침식성은 양호하지만 재질자체의 경도가 높게되어 개공성이 불량해지기 때문이다.In the present invention, it is preferable to limit the amount of the alumina to 25% to 45% by weight (hereinafter referred to as only%), which is less than 25% of the corrosion resistance, and exceeds 45% Erosion is good, but the hardness of the material itself is high, the porosity is poor.

또한, 상기 알루미나는 5-3mm, 3-1mm, 1-0.5mm 및 0.044mm이하의 4등급의 입도분포를 갖는 원료를 사용함이 충진성을 확보함에 바람직하다.In addition, the alumina is preferably 5-4mm, 3-1mm, 1-0.5mm and using a raw material having a particle size distribution of the grade 4 or less of 0.044mm or less to ensure the filling properties.

상기 탄화규소는 슬랙에 대한 내침식성이 좋고 탄소의 산화억제효과가 있을 뿐만 아니라 내침식성 및 내마모성 증진에도 효과적이다. 그러나 그 사용량이 부족하면 탄화규소의 산화에 의하여 생성되는 산화규소의 생성량이 적어 산화억제효과가 저하되며, 과다하면 탄화규소가 자체소결성이 없으므로 강도를 저하시킬 수 있다.The silicon carbide has good corrosion resistance to slack and not only has an oxidation inhibitory effect of carbon, but also is effective in enhancing corrosion resistance and wear resistance. However, if the amount used is insufficient, the amount of silicon oxide produced by the oxidation of silicon carbide is small, and the oxidation inhibitory effect is lowered. When the amount is excessive, silicon carbide is not self-sintering and thus the strength may be reduced.

따라서, 본 발명에서는 탄화규소의 사용량을 12~25%로 제한함이 바람직하다.Therefore, in the present invention, the amount of silicon carbide used is preferably limited to 12 to 25%.

상기 코크스는 휘발분의 제거를 위한 통로로서 작용을 하며 개공이 잘 되도록 하는 역할을 한다. 본 발명에서는 그 사용량을 5~9%로 제한함이 바람직한데, 이는 5%미만에서는 기공율이 낮아 휘발분 제거의 통로로서 역할을 못하는 반면에, 9%를 초과하면 소결성이 불량하여 강도가 저하되는 문제가 있기 때문이다.The coke acts as a passage for the removal of volatiles and serves to open well. In the present invention, it is preferable to limit the amount of use to 5-9%, which is less than 5%, the porosity is low and does not act as a passage for removing volatile matters, whereas if it exceeds 9%, the sinterability is poor and the strength is lowered. Because there is.

상기 점토는 폐쇄용내화물에 가소성을 부여하기 위하여 사용되는 것으로, 본 발명에서는 그 사용량을 7~12%로 제한함이 바람직하다.The clay is used to impart plasticity to the closed refractory material, in the present invention, it is preferable to limit the amount of use to 7 to 12%.

왜냐하면 그 사용량이 7%미만에서는 가소성부족으로 작업성이 좋지 않고 충진시 균열이 생겨 용선 및 슬랙의 침투로 개공성 불량이 초래될 뿐 만 아니라 심도저하의 원인이 되며, 12%를 초과하면 슬랙과 반응하여 저융물을 다량 생성하므로 침식이 심하여 출선말기에 출선구경 확대를 초래할 수 있기 때문이다.If the amount is less than 7%, the plasticity is insufficient and the workability is poor. When filling, cracks are generated, and the penetration of molten iron and slack not only leads to poor porosity, but also causes deterioration of depth. This is because a large amount of low melt is generated by the reaction, so that erosion is severe and may lead to enlargement of the diameter at the end of the departure.

본 발명에서 상기 폐내화물은 제철설비에서 발생되는 알루미나-탄화규소-카본계 폐내화물로서, 예컨데 혼선차등의 내장벽돌 수리시 발생되는 알루미나-탄화규소-카본계 폐내화물을 들 수 있다.In the present invention, the waste refractories are alumina-silicon carbide-carbon waste refractories generated in steelmaking facilities, for example, alumina-silicon carbide-carbon waste refractories generated when repairing a built-in brick, such as crossroad cars.

즉, 본 발명에서는 상기 알루미나-탄화규소-카본계 폐내화물을 이용하여 고로 출선구 폐쇄용 내화재 조성물을 제조함을 그 특징으로 한다. 상술하면, 본 발명은 상기 폐내화물이 고로 출선구의 폐쇄용 내화물과 성분이 유사하므로 이를 이용하면 사용원료 절감효과가 있으며, 아울러 이들 폐내화물은 고온에서 장시간 사용하였기 때문에 광물상이 안정되어 있어 이를 이용하여 고로 출선구의 폐쇄용 내화물을 제조할 경우 고온 용적안정성 유지에 효과적임에 기초하여 마련된 것이다.That is, the present invention is characterized in that a refractory composition for blast furnace exit closure is prepared using the alumina-silicon carbide-carbon waste refractories. In detail, the present invention is because the waste refractories are similar to those of the closing refractory of the blast furnace outlet, and using them has the effect of reducing raw materials, and these waste refractories are stable in mineral phase because they have been used at high temperatures for a long time. In the case of manufacturing the refractory for closing the blast furnace opening was prepared based on the effective in maintaining the high temperature volumetric stability.

본 발명에서는 이러한 알루미나-탄화규소-카본계 폐내화물의 사용량을 10~20%범위로 제한함이 바람직한데, 이는 그 사용량이 10%미만에서는 전체 원료에 비해 사용량이 부족하므로 고온안정성 유지에 효과가 없으며, 20%를 초과할 경우에는 고온안정성은 유지되지만 소결이 잘 되지 않아 고온강도가 저하되기 때문이다.In the present invention, it is preferable to limit the amount of such alumina-silicon carbide-carbon waste refractories in the range of 10 to 20%, which is less effective than maintaining the high temperature stability because the amount is less than the total raw materials. If it exceeds 20%, the high temperature stability is maintained, but because the sintering is not good, the high temperature strength is lowered.

그리고 상기 폐내화물의 사용입도를 3-1mm와 0.5mm의 2종류를 사용함이 보다 바람직하다.In addition, it is more preferable to use two kinds of used particle sizes of the waste refractories, 3-1 mm and 0.5 mm.

상기 금속실리콘 및 질화규소철은 고온에서 소결을 촉진하여 고온강도를 높이는 작용을 하는 성분으로 단독으로 사용하기 보다는 병행사용이 효과적이다.The metal silicon and silicon nitride are effective in parallel use rather than being used alone as a component that promotes sintering at a high temperature to increase the high temperature strength.

본 발명에서 상기 금속실리콘과 질화규소철의 사용량이 적으면 소결촉진효과가 적어 고온강도가 크지 않은 반면에, 사용량이 과소하면 강도증진효과는 있으나 과소결로 조직이 치밀하게 되어 개공성 불량이 되기 쉽다.In the present invention, when the amount of the metal silicon and the silicon nitride is less used, the sintering promoting effect is less, and the high temperature strength is not large. On the other hand, when the amount is used too much, the strength is increased, but the structure becomes dense due to the over sintering, which leads to poor porosity.

이를 고려하여, 본 발명에서는 금속실리콘 및 질화규소철의 사용량을 3~7%, 6~10%로 각각 제한함이 바람직하다.In consideration of this, in the present invention, it is preferable to limit the amount of metal silicon and silicon nitride to 3 to 7%, 6 to 10%, respectively.

상기 붕사(Borax)는 탄화규소의 산화방지를 하고 저온과 1000℃에서 소결을 촉진하여 강도를 높이는 역할을 한다. 그러나 그 사용량이 적으면 그 원하는 역할을 기대할 수 없으며, 과다하면 산화방지 및 강도증진 효과는 있으나 저융점물질을 형성하므로 내침식성이 저하하는 문제가 있다.The borax (Borax) serves to prevent the oxidation of silicon carbide and to increase the strength by promoting sintering at low temperature and 1000 ℃. However, if the amount is small, the desired role can not be expected, and if excessive, there is a problem of preventing oxidation and increasing strength but forming a low melting point material and thus reducing corrosion resistance.

따라서, 본 발명에서는 상기 붕사의 사용량을 2~5%로 제한함이 바람직하다.Therefore, in the present invention, it is preferable to limit the amount of the borax used to 2 to 5%.

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

(실시예)(Example)

하기 표 1과 같은 조성을 갖는 고로 출선구의 폐쇄용내화물용 조성물을 각각 마련하였다. 그리고 이와 같이 마련된 각각의 조성물에 그 조성물의 전중량에 대한 중량%로 15%의 타-르를 각각 첨가한후 이를 혼련하여 40x40x160mm의 크기로 성형하였다.To prepare a composition for the closing refractory of the blast furnace outlet having the composition shown in Table 1, respectively. Then, to each composition prepared as described above, 15% of tar was added by weight to the total weight of the composition, respectively, and kneaded to form a size of 40 × 40 × 160 mm.

상기와 같이 성형된 각각의 시편에 대하여 선변화율, 곡강도, 열간강도 및 내침식성을 평가하여 그 결과를 또한 하기 표 1에 나타내었다.For each specimen molded as described above, the line change rate, bending strength, hot strength and erosion resistance were evaluated and the results are also shown in Table 1 below.

한편, 하기 표 1에서 선변화율과 소성강도는 상기 시편들을 이용하여 상온 및 1500℃에서 측정된 값을 말하며, 열간 곡강도는 환원분위기하에 1450℃에서 30분간 유지하여 측정된 결과치를 말한다.On the other hand, in Table 1, the line change rate and the plastic strength refers to the values measured at room temperature and 1500 ℃ using the specimens, the hot bending strength refers to the results measured by maintaining for 30 minutes at 1450 ℃ under a reducing atmosphere.

그리고 내침식성시험은 고주파 유도용해로에서 고로 수재를 사용하여 1550℃에서 1시간 유지한 후 출선하여 시편의 잔존두께를 측정하여 평가한 것이다.The erosion resistance test was performed by measuring the residual thickness of the specimen by holding it at 1550 ° C. for 1 hour using blast furnace wood in a high frequency induction melting furnace.

발명예Inventive Example 비교예Comparative example 종래재Conventional 1One 22 33 44 55 1One 22 33 44 55 66 77 폐쇄용 내화재조성물(중량%)Closing fireproof composition (% by weight) 전융질 알루미나Electrolytic Alumina 2525 3030 3535 4040 4545 2020 3030 2626 4040 5555 4343 2727 -- 탄화규소Silicon Carbide 2525 2222 2020 1515 1212 2020 1515 3030 1212 1010 2222 1515 1010 코크스cokes 55 55 77 77 99 88 77 55 33 66 88 66 1010 점토clay 1212 1010 88 88 77 1414 1010 55 1010 99 1010 88 77 보키사이트Boki Site -- -- -- -- -- -- -- -- -- -- -- -- 4040 납석Feldspar -- -- -- -- -- -- -- -- -- -- -- -- 2020 폐내화물Waste refractories 2020 2020 1515 1010 1010 2525 1515 1212 1717 77 55 2727 -- 금속실리콘Metal silicon 33 33 55 55 77 55 1010 77 22 33 44 66 33 질화규소철Silicon nitride 88 77 77 1010 66 88 1010 88 1212 55 66 88 1010 붕사borax 22 33 33 55 44 -- 33 77 44 55 22 33 -- 선변화율(%)Rate of change (%) 300℃×24Hr300 ℃ × 24Hr -0.03-0.03 -0.02-0.02 -0.04-0.04 -0.03-0.03 -0.02-0.02 -0.15-0.15 -0.09-0.09 -0.10-0.10 -0.20-0.20 -0.18-0.18 -0.22-0.22 -0.25-0.25 +0.20+0.20 1500℃×3Hr1500 ℃ × 3Hr +0.03+0.03 +0.07+0.07 +0.10+0.10 +0.05+0.05 +0.09+0.09 -0.20-0.20 -0.25-0.25 -0.18-0.18 -0.19-0.19 -0.05-0.05 -0.27-0.27 -0.25-0.25 +0.30+0.30 곡강도(kg/cm2)Bending strength (kg / cm 2 ) 300℃×24Hr300 ℃ × 24Hr 8585 9090 8080 9797 8787 4848 5252 5858 6060 5050 4747 4545 5353 1500℃×3Hr1500 ℃ × 3Hr 130130 125125 136136 140140 138138 7676 8080 8484 7979 8383 7272 7070 7878 열간공강도(kg/cm2)Hot pore strength (kg / cm 2 ) 8080 8585 7878 7474 7676 5050 4545 4848 5252 4949 4040 4242 4040 내침식성(침식깊이 mm)Corrosion Resistance (Erosion Depth mm) 3.23.2 3.53.5 2.82.8 2.62.6 3.03.0 5.45.4 6.56.5 5.05.0 6.36.3 5.35.3 6.86.8 7.07.0 7.87.8

상기 표 1에서 알 수 있는 바와 같이, 폐내화물등의 사용량이 적정치로 제어된 발명예(1-5)의 경우, 선변화율, 곡강도, 열간강도 및 내침식성을 측정한 결과 모두 우수한 결과를 얻을 수 있음을 알 수 있다.As can be seen from Table 1, in the case of the invention example (1-5) in which the amount of waste refractory is controlled to an appropriate value, all of the results obtained by measuring the linear change rate, bending strength, hot strength and erosion resistance are excellent. It can be seen that.

이에 반하여, 폐내화물을 이용하지 않은 종래재의 경우 뿐만 아니라 그 구성성분이 본 발명의 범위를 벗어난 비교예(1-7)도 선변화율, 소성강도, 열간강도, 내침식성이 좋지 않음을 알 수 있다.On the contrary, it can be seen that not only the conventional materials which do not use waste refractories, but also Comparative Examples (1-7) whose components are outside the scope of the present invention have poor line change rate, plastic strength, hot strength, and erosion resistance. .

상술한 바와 같이, 본 발명에서는 알루미나-탄화규소-카본계 폐내화물을 이용하여 고온안정성 및 내침식성이 우수한 고로 출선구 폐쇄용 내화재 조성물을 제공함으로써 개공시간이 단축될 뿐만 아니라 출선시간 연장 및 출선회수 저감에 그 유용한 효과가 있는 것이다.As described above, in the present invention, by using the alumina-silicon carbide-carbon waste refractories, by providing a refractory composition for closing the blast furnace exit excellent in high temperature stability and corrosion resistance, not only the opening time is shortened but also the extension time and the number of times of departure There is a useful effect on the reduction.

Claims (1)

중량%로, 전융질 알루미나: 25-45%, 탄화규소: 12-25%, 코크스: 5-9%, 점토: 7-12%, 알루미나-탄화규소-카본계 폐내화물 10-20%, 금속실리콘: 3-7%, 질화규소철: 6-10%, 붕사: 2-5%를 포함하여 조성되는 고로 출선구 폐쇄용 내화재 조성물.By weight, electrolytic alumina: 25-45%, silicon carbide: 12-25%, coke: 5-9%, clay: 7-12%, alumina-silicon carbide-carbon waste refractories 10-20%, metal Refractory composition for blast furnace exit closure composition comprising silicon: 3-7%, silicon nitride: 6-10%, borax: 2-5%.
KR10-2000-0079226A 2000-12-20 2000-12-20 Tap hole mix for blast furnace KR100468449B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2000-0079226A KR100468449B1 (en) 2000-12-20 2000-12-20 Tap hole mix for blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2000-0079226A KR100468449B1 (en) 2000-12-20 2000-12-20 Tap hole mix for blast furnace

Publications (2)

Publication Number Publication Date
KR20020049902A KR20020049902A (en) 2002-06-26
KR100468449B1 true KR100468449B1 (en) 2005-01-29

Family

ID=27683848

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-2000-0079226A KR100468449B1 (en) 2000-12-20 2000-12-20 Tap hole mix for blast furnace

Country Status (1)

Country Link
KR (1) KR100468449B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100891860B1 (en) * 2002-09-03 2009-04-08 주식회사 포스코 Taphole mix of blast furnace having high corrosion resistivity and superior adhesive property

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR850003898A (en) * 1983-10-29 1985-06-29 고준식 Blast Furnace Stamp Material
JPH0380159A (en) * 1989-08-23 1991-04-04 Kurosaki Refract Co Ltd Casting refractories for runner cover of casting bed in blast furnace
KR960011348A (en) * 1994-09-24 1996-04-20 이헌조 High internal flashing control device and method
KR960015652A (en) * 1994-10-06 1996-05-22 김광호 Device for extracting selected composite video signal from time division multiplexed video signal
KR20010017579A (en) * 1999-08-12 2001-03-05 신현준 Ramming refractories for molten trough cover of blast furnace
KR20020018244A (en) * 2000-09-01 2002-03-08 이구택 Rapidly repairing refractories for trough of blast furnace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR850003898A (en) * 1983-10-29 1985-06-29 고준식 Blast Furnace Stamp Material
JPH0380159A (en) * 1989-08-23 1991-04-04 Kurosaki Refract Co Ltd Casting refractories for runner cover of casting bed in blast furnace
KR960011348A (en) * 1994-09-24 1996-04-20 이헌조 High internal flashing control device and method
KR960015652A (en) * 1994-10-06 1996-05-22 김광호 Device for extracting selected composite video signal from time division multiplexed video signal
KR20010017579A (en) * 1999-08-12 2001-03-05 신현준 Ramming refractories for molten trough cover of blast furnace
KR20020018244A (en) * 2000-09-01 2002-03-08 이구택 Rapidly repairing refractories for trough of blast furnace

Also Published As

Publication number Publication date
KR20020049902A (en) 2002-06-26

Similar Documents

Publication Publication Date Title
US8163666B2 (en) Taphole mix
KR910001934B1 (en) Carbon containing refractory
US5411997A (en) Mud material used for iron tap hole in blast furnace
KR100468449B1 (en) Tap hole mix for blast furnace
KR100723131B1 (en) Batch composition for taphole mix of blast furnace
KR100891860B1 (en) Taphole mix of blast furnace having high corrosion resistivity and superior adhesive property
KR20020050453A (en) Tap hole mix for blast furnace
JPH07215773A (en) Silicon carbide-based casting material
JP6266968B2 (en) Blast furnace hearth lining structure
KR960015652B1 (en) Composition of mud
KR100742862B1 (en) Batch composition for tap hole of blast furnace
KR100891861B1 (en) Ceramic fiber inclusion blast furnace taphole mix
JP6583968B2 (en) Refractory brick
JP6744555B2 (en) Sliding gate type plate refractory
KR101605758B1 (en) Refractories for closing tap hole of blast furnace and closer using the same
WO2016208666A1 (en) Furnace bed bricks for molten iron production furnace
JP2009052121A (en) Closing material in molten pig iron tapping hole for blast furnaces
JP3224990B2 (en) Blast furnace taphole plugging material
KR100373702B1 (en) Block Molding Using Alumina-Spinel Waste Castable
KR100328049B1 (en) Dry ramming material refractory composition for repairing road of electric furnace
KR100723132B1 (en) Gunning refractories for trough of blast furnace
JPH0465370A (en) Casting material for molten pig iron pretreating vessel
JP6302626B2 (en) Refractory mortar
JP2521941B2 (en) Blocker for tap of metal melting furnace
JPS5849669A (en) Anticorrosive indefinite form refractories

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20100125

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee