KR101066575B1 - Batch composition of thermal insulation packing materials - Google Patents

Batch composition of thermal insulation packing materials Download PDF

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KR101066575B1
KR101066575B1 KR1020040073141A KR20040073141A KR101066575B1 KR 101066575 B1 KR101066575 B1 KR 101066575B1 KR 1020040073141 A KR1020040073141 A KR 1020040073141A KR 20040073141 A KR20040073141 A KR 20040073141A KR 101066575 B1 KR101066575 B1 KR 101066575B1
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refractory
weight
filler composition
alumina
fiber
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KR1020040073141A
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KR20060024248A (en
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김효준
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재단법인 포항산업과학연구원
주식회사 포스코
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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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/303—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
    • 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

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

Abstract

본 발명은 일반 가열로, 코크스로 등 각종 고온 로 설비에서 철피와 내화물간의 틈(gap)사이에 충진하여 사용하는 내화단열 충진재 조성물에 관한 것으로, 그 구성은 중량%로 기화이버 45-65%, 활석 5-10%, 초미분실리카 4-7%, 하소알루미나 10-15%, 실리카졸 : 16-23%로 조성된다.The present invention relates to a refractory insulation filler composition used by filling between the gap between the shell and the refractory in various high temperature furnace equipment such as a general heating furnace, coke oven, the composition is 45% to 65% by weight of vaporized fiber, Talc 5-10%, ultra fine silica 4-7%, calcined alumina 10-15%, silica sol: 16-23%.

상기의 구성을 갖는 본 발명에 따른 내화단열 충진재 조성물은 충진성 및 단열성이 우수하여 고온 로 설비에서 철피와 내화물간의 열 차단효과를 높이므로 열 손실 저감 및 철피 보호에 매우 효과적이다.The refractory insulation filler composition according to the present invention having the above structure has excellent filling properties and heat insulating properties, and thus is highly effective in reducing heat loss and protecting the sheaths by increasing the heat shielding effect between the sheaths and the refractory in a high-temperature furnace facility.

무기화이버, 열차단성, 충진재, 철피 보호Inorganic fibers, thermal insulation, fillers, shield protection

Description

내화단열 충진재 조성물{Batch composition of thermal insulation packing materials}Batch composition of thermal insulation packing materials

본 발명은 내화단열 충진재 조성물에 관한 것으로서, 더욱 상세하게는 일반 가열로, 코크스로 등 각종 고온 로 설비에서 철피와 내화물간의 틈(gap)사이에 충진하여 열 손실 저감 및 철피를 보호하도록 한 내화단열 충진재 조성물에 관한 것이다.The present invention relates to a refractory insulation filler composition, and more particularly, to refractory insulation that is filled between gaps between a shell and a refractory in various high temperature furnace facilities such as a general furnace and a coke furnace to reduce heat loss and protect the shell. It relates to a filler composition.

일반적으로 고온에서 사용되는 로 설비는 철피와 내장 내화물간의 틈 사이에서 열 손실이 많이 발생함으로 그 열 손실을 줄이기 위하여 철피와 내장 내화물의 틈 사이에 열 차단효과와 아울러 철피를 보호하기 위하여 충진재를 채워 넣고 있는 바, 그 충진재로는 작업성이 좋고 충진두께가 얇으면서도 열 차단효과가 우수한 재질이 이여야 한다.In general, the furnace equipment used at high temperature generates a lot of heat loss between the gap between the shell and the internal refractories, so as to reduce the heat loss, the filler is filled with a heat shielding effect between the gap between the shell and the internal refractory. As a filler, the filler should be made of a material that has good workability and a thin filling thickness and excellent heat shielding effect.

종래의 철피와 내장 내화물간의 틈 사이에 충진되는 충진재는 일본국 특허공개공보 (평)6-279129호 및 특허공개공보 (평)9-142944호 있으며, 상기 일본국 특허공개공보 (평)6-279129호는 용융금속용기에 사용되는 것으로, 고 열팽창성 연와를 사용하여 축조하는 경우에 사용하는 몰탈로서, 마그네슘, 알루미늄등의 탄산염이나 수산화물의 1종 또는 2종이상의 분말 10중량%이상과 내화분말로 된 내화몰탈이다.Fillers filled between the gap between conventional bark and internal refractories are Japanese Patent Laid-Open No. 6-279129 and Japanese Patent Laid-Open No. 9-142944, and the Japanese Patent Laid-Open No. No. 279129 is used for molten metal containers. It is a mortar used for the construction using high thermally expansible soft wires. It contains at least 10% by weight of powders of one or two or more kinds of carbonates and hydroxides such as magnesium and aluminum and refractory powders. It is fireproof mortar.

그리고, 상기 일본국 특허공개공보 (평)9-142944호는 공업로의 철피와 내장내화물간 또는 내화물 상호간의 틈새에 압입하는 압입보수재로서, 분말골재와 방향족 탄화수소 수지액과의 혼합물로 구성되고, 200oC에서 24시간 유지후의 체적감소율이 2.0%이하이고 열 경화하지 않는 것이다.In addition, the Japanese Patent Application Laid-Open No. 9-142944 is a press-fitting repair material press-fitted into a gap between the steel bar and internal refractories or between the refractory materials of an industrial furnace, and is composed of a mixture of powdered aggregate and aromatic hydrocarbon resin solution, After 24 hours of storage at 200 o C, the volume reduction rate is less than 2.0% and is not thermally cured.

그러나, 이들은 모두 장기간 사용되는 용융금속용기 및 공업로의 보수에 사용되는 내화물에 관한 것으로서, 내화벽돌에 의한 팽창을 억제하기에는 강도가 약하고 열 차단효과 또한 약함으로 사용상의 제한을 받고있다.However, these are all related to refractory materials used for repairing molten metal containers and industrial furnaces that are used for a long time, and are limited in use due to their low strength and low thermal barrier effect to suppress expansion by refractory bricks.

본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 그 목적은 열 손실 저감 및 철피를 보호하도록 하는 무기화이버, 활석, 초미분실리카, 하소알루미나와 고온에서의 접착강도를 높이는 실리카졸을 적정비율로 혼합하여 된 고온에서 사용되는 로 설비의 철피와 내장 내화물간의 틈 사이에 충진하여 사용하는 내화단열 충진재 조성물을 제공함에 있다.The present invention has been invented to solve the above problems, the object is to titrate the silica sol to increase the adhesive strength at high temperatures with inorganic fibers, talc, ultra fine silica, calcined alumina to reduce heat loss and protect the shell. It is to provide a refractory insulation filler composition used by filling between the gap between the shell of the furnace equipment and the internal refractories used at a high temperature mixed at a ratio.

상기 목적을 달성하기 위한 본 발명의 특징적인 기술적 구성은, 중량%로 무기화이버 45-65%, 활석 5-10%, 초미분실리카 4-7%, 하소알루미나 10-15%, 실리카졸 : 16-23%로 조성하여 된 것이다.Characteristic technical features of the present invention for achieving the above object, by weight% inorganic fiber 45-65%, talc 5-10%, ultra fine silica 4-7%, calcined alumina 10-15%, silica sol: 16 It was made at -23%.

그리고, 상기 무기화이버는 알루미나-실리카성분계로서, 알루미나 함량이 30-60중량%의 것이며, 섬유길이는 1-5mm의 것이다.In addition, the inorganic fiber is an alumina-silica component system, the alumina content is 30-60% by weight, the fiber length is 1-5mm.

상기와 같은 특징을 갖는 본 발명의 내화단열 충진재 조성물에서 각 원료의 역할 및 사용량에 대하여 설명하면 다음과 같다.Referring to the role and the amount of each raw material used in the refractory insulation filler composition of the present invention having the characteristics as described above are as follows.

첫째, 무기화이버(Inorganic fiber)는 탄력성이 좋으므로 충진효과를 높이고, 무기화이버끼리 엉켜서 미세기공을 형성하므로 공기를 외부와 차단하여 단열효과를 높이는 역할을 한다.First, the inorganic fiber (Inorganic fiber) has a good elasticity to increase the filling effect, the inorganic fibers intertwine to form micropores, thereby blocking the air from the outside to increase the insulation effect.

상기와 같은 역할을 하는 무기화이버는 성분에 따라서 여러 종류가 있으나 본 발명에서는 알루미나-실리카성분계를 사용하였고, 상기 무기화이버에 함유된 알루미나 함량은 30-60중량%의 범위에 있는 것을 사용하였으며, 섬유길이는 1-5mm의 것을 사용하였다.There are various kinds of inorganic fibers to play the role as described above, but in the present invention, the alumina-silica component system was used, and the alumina content contained in the inorganic fiber was used in the range of 30-60% by weight, and the fiber The length was 1-5 mm.

상기와 같이 본 발명에서 사용되는 알루미나-실리카성분계의 무기화이버 사용량은 전체사용량대비 중량%로 45-65%인데, 그 45-65중량%를 사용하는 이유는 450중량%이하에서는 화이버량이 적어서 열 차단효과가 약하므로 부적합하였고, 65중량%이상에서는 열 차단효과는 좋으나 화이버량이 많아서 화이버끼리 서로 얽혀 잘 풀어지지 않아 미세기공 형성에는 부적합하다. 따라서 무기화이버의 바람직한 사용량은 45-65중량% 이다.As described above, the amount of inorganic fiber used in the alumina-silica component used in the present invention is 45-65% by weight relative to the total amount used, and the reason for using the 45-65% by weight is less than 450% by weight due to the thermal cutoff. The effect was inadequate due to its weakness, and the heat shielding effect was good at more than 65% by weight, but the amount of fibers was large, so that the fibers were not entangled with each other and thus not suitable for forming micropores. Therefore, the preferred amount of inorganic fiber is 45-65% by weight.

한편, 상기 본 발명에서 사용되는 무기화이버는 알루미나-실리카성분계로서, 상기 무기화이버에 함유된 알루미나 함량은 30-60중량%인데, 그 이유는, 알루미나 함량이 30중량%이하에서는 화이버의 내열온도가 낮아서 고온에서 사용하기에 부적 합하고, 60중량%이상에서는 알루미나 함량이 과다하여 1200oC이상의 사용온도에서 소결이 어려우므로 접착성이 좋지 않다. 따라서, 무기화이버에 함유된 알루미나 함량은 30-60중량%의 것이 바람직하다.On the other hand, the inorganic fiber used in the present invention is an alumina-silica component system, the alumina content contained in the inorganic fiber is 30-60% by weight, because the heat resistance temperature of the fiber is less than 30% by weight It is low and unsuitable for use at high temperatures, and over 60% by weight of alumina content is excessive, sintering is difficult at the operating temperature of more than 1200 o C, poor adhesion. Therefore, the alumina content contained in the inorganic fiber is preferably 30 to 60% by weight.

그리고, 섬유의 길이는 1-5mm인 것을 사용하는데, 그 이유는 1mm이하에서는 너무 미세하여 충진 효과가 약하므로 효과적이지 못하고, 5mm이상에서는 섬유끼리 얽혀서 잘 풀어지지 않아 혼련이 잘 되지 않을 뿐 만 아니라 작업성이 저하되고 충진재의 조직이 불규칙하여 단열효과가 저하된다. 따라서, 섬유의 길이는 1-5mm인 것을 사용함이 바람직하다.And, the length of the fiber is used 1-5mm, the reason is that it is not effective because the filling effect is weak at 1mm or less, and not more than 5mm because the fibers are entangled and do not loosen well, The workability is reduced and the structure of the filler is irregular, which lowers the insulation effect. Therefore, it is preferable to use the length of the fiber 1-5mm.

둘째, 활석(talc, 3MgO.2SiO2.H2O)은 충진재에서 충진효과를 나타내는 역할을하는 것으로 그 사용량은 전체량 대비 중량%로 5-10%인 바, 그 이유는, 활석의 사용량이 5중량%이하에서는 충진효과가 적고, 10중량%이상에서는 과량이 되어 충진성이 저하되므로 사용에 부적합하다. 따라서 활석의 적당한 사용량은 5-10중량% 이다.Secondly, talc (talc, 3MgO.2SiO 2 .H 2 O) plays a role in filling the fillers, and the amount of talc is 5-10% by weight of the total amount. Less than 5% by weight of the filling effect is less, more than 10% by weight is excessive, the filling properties are unsuitable for use. Therefore, a suitable amount of talc is 5-10% by weight.

셋째, 초미분실리카는 입도가 0.043mm이하로서 분산효과를 높여서 수분량을 저감시키는 역할을 하는 것으로, 입도가 0.043mm이상에서는 입도가 커서 분산효과가 저하되므로 수분량 저감효과가 없으며, 입도가 0.043mm이하에서는 미세할수록 분산효과가 크므로 사용에는 문제가 없다. Third, ultra fine silica has a particle size of 0.043mm or less, which increases the dispersing effect and reduces the amount of water.At the particle size of 0.043mm or more, the particle size is large and the dispersing effect is reduced, so the particle size is less than 0.043mm. The finer is, the greater the dispersing effect, so there is no problem in use.

그 사용량은 전체량 대비 4-7중량%인 바, 그 이유는 4중량%이하에서는 사용량이 적어서 분산효과가 부족하여 부적합하였고, 7중량%이상에서는 원료자체의 체 적이 크서 분말량이 많아지므로 분산효과가 오히려 저하된다. 따라서 초미분실리카의 적당한 사용량은 4-7중량% 이다. The amount used is 4-7% by weight of the total amount. The reason is that the amount is less than 4% by weight, which is insufficient due to the lack of dispersing effect. Rather deteriorates. Therefore, the appropriate amount of ultra fine silica is 4-7% by weight.

넷째, 하소알루미나는 반응성이 좋으므로 충진재의 소결성을 좋게하여 부착강도를 높이는 역할을 하는 것으로, 그 사용량은 전체량 대비 10-15중량%인바, 그 이유는 10중량%이하에서는 사용량 부족으로 소결성이 저하되고, 15중량%이상에서는 과소결로 인하여 수축이 심하게 일어난다. 따라서 하소알루미나의 적당한 사용량은 10-15중량% 이다. Fourth, because calcined alumina has good reactivity, it improves adhesion strength by improving the sinterability of fillers, and its amount is 10-15% by weight relative to the total amount. It is lowered and shrinkage occurs severely due to oversintering at 15% by weight or more. Therefore, a suitable amount of calcined alumina is 10-15% by weight.

다섯째, 실리카 졸은 실링재의 점성을 높이고 경화를 촉진시키는 역할을 하는 것으로, 그 사용량은 전체량 대비 16-23중량%인 바, 그 이유는, 16중량%이하에서는 혼련성이 좋지 않고 경화속도도 느리므로 부적합하며, 23중량%이상에서는 혼련성은 좋으나 경화속도가 빨라서 사용에 부적합하다. 따라서 실리카 졸의 적당한 사용량은 16-23중량% 이다.Fifth, the silica sol increases the viscosity of the sealing material and promotes hardening. The amount of the silica sol is 16-23% by weight relative to the total amount. It is unsuitable because it is slow, and the kneading property is good at more than 23% by weight, but it is not suitable for use due to the fast curing speed. Thus, a suitable amount of silica sol is 16-23% by weight.

이하, 본 발명을 실시예를 통하여 보다 구체적으로 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to Examples.

[실시예][Example]

하기 표1와 같은 조성비를 가진 충진재를 제조하기 위해서는 만능 혼련기에서 분말 원료를 미리 투입하여 건식혼련한 후에 실리카 졸과 물을 첨가하여 균일하게 혼련이 되도록 하였고, 작업성은 충진재의 혼련상태 및 손에 부착되는 접착력으로 판단하였다. 이와 같이 하여 제조된 시료를 40x40x160mm의 형틀을 사용하여 수작업으로 성형한 후, 105℃를 유지하는 건조기에서 48시간 건조한 후 탈형하여 1300℃에서 3시간 소성한 후에 선변화율, 곡강도, 비중, 기공율을 측정하고 그 결 과를 나타내었다.In order to prepare the filler having the composition ratio as shown in Table 1, the powder raw material was added in advance in the universal kneader to dry kneading, and then added to the silica sol and water to be uniformly kneaded. Judging by the adhesive force to be attached. The samples prepared in this way were molded by hand using a mold of 40x40x160mm, dried for 48 hours in a dryer maintaining 105 ° C, demolded and calcined at 1300 ° C for 3 hours, and then the linear change rate, bending strength, specific gravity, and porosity were measured. The results are shown.

한편, 부착성시험은 샤모트질벽돌에 폭 5mm, 깊이 10mm의 홈을 파서 제조된 실링재를 충진한 후, 600℃ 전기로에서 가열하여 부착정도를 판단하였다. On the other hand, in the adhesion test, after filling the sealing material manufactured by digging a groove of 5mm width and 10mm depth in chamotte brick, it was heated in 600 ℃ electric furnace to determine the degree of adhesion.

하기 표 1에서 알 수 있는 바와 같이, 본 발명의 범위를 만족하는 발명예(1-5)는 비교예 (1-4) 및 종래재와 비교하여 선변화율이 비교적 작고, 소성강도가 크며, 비중이 작으므로 충진성이 우수함을 알 수 있었다. As can be seen in Table 1, Inventive Example (1-5), which satisfies the scope of the present invention, has a relatively small line change rate, a large plastic strength, and a specific gravity compared to Comparative Example (1-4) and conventional materials. Since it was small, it turned out that filling property is excellent.

〔표 1〕Table 1

구분division 발명예Inventive Example 비교예Comparative example 종래재Conventional 1One 22 33 44 55 1One 22 33 44 무기 화이버Weapon fiber 5050 5454 5757 6060 6565 4747 6868 5656 6060 4343 활석talc 99 77 55 66 55 1010 55 77 44 -- 실리카 초미분Ultrafine Silica Powder 44 66 55 44 44 77 33 88 55 -- 하소알루미나Calcined alumina 1515 1414 1313 1111 1010 1313 99 1616 1212 -- 실리카졸Silica sol 2222 1919 2020 1919 1616 2323 1515 1313 1919 -- 보키사이트Boki Site -- -- -- -- -- -- -- -- -- 2020 납석Feldspar -- -- -- -- -- -- -- -- -- 2020 점토clay -- -- -- -- -- -- -- -- -- 1515 PVAPVA -- -- -- -- -- -- -- -- -- 22 작업성Workability ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ XX XX XX XX △△ 선변화율(%)Rate of change (%) -1.25-1.25 -1.27-1.27 -1.30-1.30 -1.29-1.29 -1.31-1.31 -1.43-1.43 -1.47-1.47 -1.49-1.49 -1.40-1.40 -1.74-1.74 곡강도(kg/cm2)Bending strength (kg / cm 2 ) 15.415.4 15.815.8 16.316.3 16.016.0 15.915.9 11.211.2 12.512.5 11.811.8 12.812.8 8.38.3 비중importance 0.880.88 0.870.87 0.920.92 0.910.91 0.860.86 0.720.72 0.700.70 0.740.74 0.750.75 0.920.92 기공율(%)Porosity (%) 6363 6565 5454 5757 6161 7676 7979 7070 7272 7070 부착성Adhesion ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ △△ XX XX △△ XX ◎: 양호 X 불량 △: 보통◎: good X bad △: normal

상술한 바와 같은 본 발명에 따른 내화단열 충진재 조성물은 충진성 및 단열성이 우수하여 고온 로 설비에서 철피와 내화물간의 열 차단효과를 높이므로 열 손실 저감 및 철피 보호에 매우 효과적이다.As described above, the refractory insulation filler composition according to the present invention has excellent filling properties and heat insulation, and thus is highly effective in reducing heat loss and protecting the sheaths by increasing the heat shielding effect between the sheaths and the refractory materials in a high-temperature furnace facility.

Claims (4)

중량%로 무기화이버 45-65%, 활석 5-10%, 초미분실리카 4-7%, 하소알루미나 10-15%, 실리카졸 : 16-23%로 조성된 내화단열 충진재 조성물.Refractory insulation filler composition composed of inorganic fiber 45-65%, talc 5-10%, ultra fine powder 4-7%, calcined alumina 10-15%, silica sol: 16-23% by weight. 제1항에 있어서, 상기 무기화이버는 알루미나-실리카성분계임을 특징으로 하는 내화단열 충진재 조성물.The fire retardant filler composition according to claim 1, wherein the inorganic fiber is alumina-silica component-based. 제2항에 있어서, 상기 알루미나-실리카성분계의 무기화이버에서 알루미나 함량은 30-60중량%인 것임을 특징으로 하는 내화단열 충진재 조성물.The refractory insulation filler composition according to claim 2, wherein the alumina content is 30-60 wt% in the alumina-based inorganic fiber. 제1항에 있어서, 상기 무기화이버에서 섬유길이는 1-5mm인 것임을 특징으로 하는 내화단열 충진재 조성물.The fire-resistant insulation filler composition according to claim 1, wherein the inorganic fiber has a fiber length of 1-5 mm.
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US5332432A (en) 1989-08-14 1994-07-26 Nissan Chemical Industries, Ltd. Inorganic adhesive composition
JPH09263465A (en) * 1996-03-29 1997-10-07 Nagano Pref Gov Lightweight refractory and its production
KR19990067878A (en) * 1998-01-14 1999-08-25 차알즈엠하아트 Ceramic fiber insulation material

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Publication number Priority date Publication date Assignee Title
US5332432A (en) 1989-08-14 1994-07-26 Nissan Chemical Industries, Ltd. Inorganic adhesive composition
JPH09263465A (en) * 1996-03-29 1997-10-07 Nagano Pref Gov Lightweight refractory and its production
KR19990067878A (en) * 1998-01-14 1999-08-25 차알즈엠하아트 Ceramic fiber insulation material

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