JPH02212358A - Low expansion refractory board - Google Patents
Low expansion refractory boardInfo
- Publication number
- JPH02212358A JPH02212358A JP1032769A JP3276989A JPH02212358A JP H02212358 A JPH02212358 A JP H02212358A JP 1032769 A JP1032769 A JP 1032769A JP 3276989 A JP3276989 A JP 3276989A JP H02212358 A JPH02212358 A JP H02212358A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- slurry
- firing
- low expansion
- alumina
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 9
- 239000004113 Sepiolite Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 9
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 claims abstract description 4
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000005350 fused silica glass Substances 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 229910052670 petalite Inorganic materials 0.000 claims abstract description 4
- 229910052642 spodumene Inorganic materials 0.000 claims abstract description 4
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 abstract description 17
- 230000035939 shock Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は断熱性、軽量性、強度及び耐熱衝撃性に優れた
低膨張質耐火板に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a low-expansion fireproof board that has excellent heat insulation properties, light weight, strength, and thermal shock resistance.
［従来の技術］
大形サイズの耐火板は、その必要性のある部所や経済性
のために広範囲に使用されている。しかし、大形サイズ
のため熱衝撃時の応力が大きく、アルミナセメントをバ
インダーとする耐火板では、クラックが発生しなり、付
き合わせで使用する時には熱膨張による圧縮応力のため
に破壊することがあるという欠点があった。[Prior Art] Large-sized fireproof plates are widely used because of their need and economy. However, due to its large size, the stress during thermal shock is large, and fireproof boards that use alumina cement as a binder may crack, and when used together, they may break due to compressive stress caused by thermal expansion. There was a drawback.
バインダーとしてアルミナセメントを使用する際の上述
のような欠点を解消するものとして、例えば特開昭６２
−２６５１５１号公報には、ガラス繊維０．１〜７重量
％、ワラストナイト繊維２０〜６０重量％およびアルミ
ナセメント４０〜８０重量％の混合物からなる成形材料
が開示されている。As a solution to the above-mentioned drawbacks when using alumina cement as a binder, for example, Japanese Patent Application Laid-open No. 62
Publication No. 265151 discloses a molding material consisting of a mixture of 0.1 to 7% by weight of glass fibers, 20 to 60% by weight of wollastonite fibers, and 40 to 80% by weight of alumina cement.
また、特公昭５６−４５１３号公報には、重量％で、ア
ルミナセメント１０〜５０％、低膨張粉末２０〜６０％
、５ｉＣ１５〜７０％を含み、かつ上記アルミナセメン
ト、低膨張粉末及びＳｉＣの含量が全体の５０％以上を
占めている配合割合を有してなる熱膨張率が０．６％以
下の低膨張セメント質耐火素地が開示されている。In addition, in Japanese Patent Publication No. 56-4513, in weight percent, alumina cement 10 to 50%, low expansion powder 20 to 60%
, 5iC 15 to 70%, and has a blending ratio in which the alumina cement, low expansion powder, and SiC account for 50% or more of the total content, and has a coefficient of thermal expansion of 0.6% or less. A high quality refractory substrate is disclosed.
更に、特開昭６２−４６９７３号公報には、β型の天然
つオラストナイトを１〜２０重量％含有することを特徴
とするキャスタブル耐火物が開示されている。Further, JP-A No. 62-46973 discloses a castable refractory characterized by containing 1 to 20% by weight of β-type natural auslastonite.
［発明が解決しようとする課題］
しかし、上述の公報に開示されているものはガラス繊維
を使用しているために、耐火板としの耐熱性を充分に満
足するものでなかったり、大型の耐火板を製造するため
に適したものではない。[Problems to be Solved by the Invention] However, since the material disclosed in the above-mentioned publication uses glass fiber, it does not have sufficient heat resistance as a fireproof board, and may not be suitable for large fireproof boards. Not suitable for manufacturing boards.
従って、本発明はバインダーとしてアルミナセメントを
使用する耐火板の上述のようなアルミナセメント水和物
の脱水分解による欠点を解消し、断熱性、軽量性、強度
及び耐熱性に優れた低膨張質耐火板を提供することを目
的とするものである。Therefore, the present invention solves the above-mentioned disadvantages of fireproof plates using alumina cement as a binder due to dehydration and decomposition of alumina cement hydrate, and provides low expansion fireproofing with excellent heat insulation, light weight, strength and heat resistance. The purpose is to provide boards.
［課題を解決するための手段］
即ち、本発明はアルミナセメント１０〜４０重量％、ペ
タライト、スポジュウメン及びフューズドシリカよりな
る群から選択された１種または２種以上を６０〜８０重
量％、セピオライト０〜８重量％及びセルロース繊維０
〜８重量％からなり且つセピオライトとセルロース繊維
の合計量が３〜１０重量％の範囲内にある固形分をもつ
スラリーを加圧脱水成形することにより得られる成形体
であって且つ焼成されていることを特徴とする低膨張質
耐火板に係る。[Means for Solving the Problems] That is, the present invention includes 10 to 40% by weight of alumina cement, 60 to 80% by weight of one or more selected from the group consisting of petalite, spodumene, and fused silica, and 60 to 80% by weight of sepiolite. 0-8% by weight and 0 cellulose fibers
A molded body obtained by pressure dehydration molding of a slurry having a solid content of ~8% by weight and a total amount of sepiolite and cellulose fibers in the range of 3~10% by weight, and is fired. The present invention relates to a low expansion fireproof plate characterized by the following.
［作 用］
本発明の低膨張質耐火板はアルミナセメント１０〜４０
重量％、ペタライト、スポジュウメン及びフューズドシ
リカよりなる群から選択された１種または２種以上を６
０〜８０重量％、セピオライト０〜８重量％及びセルロ
ース繊維０〜８重量％からなり且つセピオライトとセル
ロース繊維の合計量が３〜１０重量％の範囲内にある固
形分をもつスラリーを加圧脱水成形し、得られた成形体
を養生及び乾燥後、１０５０〜１２５０℃の温度で２〜
１５時間焼成することにより製造することができる。[Function] The low expansion fireproof board of the present invention has alumina cement of 10 to 40
6% by weight, one or more selected from the group consisting of petalite, spodumene, and fused silica.
A slurry having a solid content of 0 to 80% by weight, 0 to 8% by weight of sepiolite, and 0 to 8% by weight of cellulose fibers, with a total amount of sepiolite and cellulose fibers in the range of 3 to 10% by weight, is dehydrated under pressure. After curing and drying the obtained molded body, it was heated at a temperature of 1050 to 1250°C for 2 to 30 minutes.
It can be produced by firing for 15 hours.
スラリーを造るための固形分の配合において、アルミナ
セメントの配合量は１０〜４０重量％が好ましい、アル
ミナセメントの配合量が１０重量％未満であると強度か
低くなるために好ましくなく、また、該配合量が４０重
量％を超える場合には熱膨張率が大きくなり、耐熱衝撃
性が低下したり、付き合わせで使用する場合には破壊す
る場合もあるために好ましくない。In the solid content formulation for making slurry, the amount of alumina cement added is preferably 10 to 40% by weight. If the amount of alumina cement added is less than 10% by weight, the strength will be low, which is undesirable. If the blending amount exceeds 40% by weight, the coefficient of thermal expansion increases, the thermal shock resistance decreases, and when used as a companion, it may break, which is not preferable.
また、セピオライトの配合量が８重量％を超えると、焼
成時の脱水による収縮のために反りが発生し易く、焼成
後に研摩が必要となり、更に、熱膨張率が大きくなるた
めに好ましくない。Furthermore, if the amount of sepiolite exceeds 8% by weight, warping is likely to occur due to shrinkage due to dehydration during firing, polishing is required after firing, and the coefficient of thermal expansion increases, which is undesirable.
更に、セルロース繊維は焼成初期に燃焼し、空隙を造る
ため、該配合量が８重量％を超えると、焼成後期におけ
る収縮が大きくなり、反りが発生し易くなり、また、焼
成後の強度低下の原因となるために好ましくない。Furthermore, since cellulose fibers burn and create voids in the early stages of firing, if the amount exceeds 8% by weight, shrinkage will increase in the later stages of firing, making it easier to warp, and also reduce strength after firing. Undesirable because it causes
ここで、セピオライトとセルロース繊維の合計量は３〜
１０重量％の範囲内が好ましい、該合計量が３重量％未
満の場合には、スラリーの加圧脱水成形時に粉体の逃げ
が多くなるために好ましくなく、また、１０重量％を超
えると、反りが太きくなるために好ましくない。Here, the total amount of sepiolite and cellulose fiber is 3~
The total amount is preferably within the range of 10% by weight. If the total amount is less than 3% by weight, it is undesirable because more powder escapes during pressurized dehydration molding of the slurry, and if it exceeds 10% by weight, This is not preferable because the warpage becomes thicker.
本発明の低膨張質耐火板を製造する際のスラリーは上述
のような配合の固形分濃度が２０〜４０重量％程度のも
のが好ましい。The slurry used for manufacturing the low expansion fireproof plate of the present invention preferably has a solid content concentration of about 20 to 40% by weight as described above.
次に、得られたスラリーを加圧脱水成形し、所望の形状
の成形体を得、該成形体を養生及び乾燥した後に焼成す
る。１０５０〜１２００℃の範囲内の温度で焼成するこ
とが好ましい、焼成温度が１０５０℃未満では焼成が不
充分で強度が低くなるために好ましくなく、また、１２
５０℃を超えると、焼成エネルギーが掛かり、炉の損傷
が進むなど、焼成コストが高くなるために好ましくない
。Next, the obtained slurry is dehydrated under pressure to obtain a molded body of a desired shape, which is cured and dried, and then fired. It is preferable to sinter at a temperature within the range of 1050 to 1200°C. If the sintering temperature is less than 1050°C, the sintering will be insufficient and the strength will be low, so it is not preferable.
If the temperature exceeds 50° C., it is not preferable because firing energy is required and the furnace is damaged, which increases the firing cost.
焼成温度は１１００〜１２００℃の範囲内が最適である
。The optimal firing temperature is within the range of 1100 to 1200°C.
また、焼成時間は２〜１５時間程度が好ましい。Further, the firing time is preferably about 2 to 15 hours.
焼成時間が２時間未満では焼成が不充分であり、１５時
間を超えると焼成コストの増加を招くために好ましくな
い、３〜８時間程度の焼成時間が最適である。If the firing time is less than 2 hours, the firing will be insufficient, and if it exceeds 15 hours, the firing cost will increase, which is undesirable.A firing time of about 3 to 8 hours is optimal.
本発明の低膨張質耐火板には、更にアルミナ−シリカ系
ファイバーを１０重量％まで配合することができる。ア
ルミナ−シリカ系ファイバーを本発明の耐火板に配合す
ることにより耐熱衝撃性の付与等の効果を発揮すること
ができる。アルミナ−シリカ系ファイバーとしては直径
５〜２０μ―、長さ４〜２０＋ｅｍ程度のものを使用す
ることが好ましい、なお、該配合量が１０重量％を超え
ると、ファイバーの分散が悪くなり、強度の低下や焼成
時に反りが発生し易くなるために好ましくない。The low expansion fireproof plate of the present invention may further contain up to 10% by weight of alumina-silica fiber. By blending alumina-silica fiber into the fireproof plate of the present invention, effects such as imparting thermal shock resistance can be exhibited. It is preferable to use alumina-silica fibers with a diameter of 5 to 20μ and a length of 4 to 20+em.If the blending amount exceeds 10% by weight, fiber dispersion will deteriorate and the strength will decrease. This is not preferable because it tends to deteriorate and warp during firing.
また、アルミナ−シリカ系ファイバーを配合する場合に
は、ファイバーの耐熱温度以下で焼成することが望まし
い。Furthermore, when blending alumina-silica fibers, it is desirable to sinter at a temperature below the heat resistant temperature of the fibers.
［実 施 例］
以下に実施例を挙げて本発明の低膨張質耐火板を更に説
明する。[Example] The low expansion fireproof plate of the present invention will be further explained with reference to Examples below.
幻１よ
下記の第１表に記載する成分を含有してなる濃度３０％
のスラリーを造り、該スラリーを３６ｋｇ／ ｃ、 ２
の圧力で８０ｍｍＸ １５０ｍｍＸ ２５ｍｍ及び９０
０ｍａＸ２４００ｍｍＸ２５−輪の形状に加圧成形し、
得られた成形体を温度２５℃、相対湿度９０％の条件下
で３日間養生し、更に、１０５℃の温度で 時間乾燥す
ることにより成形体を得た０次に、得られた成形体を１
０００〜１１５０℃で０．５〜５時間焼成することによ
り供試体を得た。Phantom 1, a concentration of 30% containing the ingredients listed in Table 1 below.
A slurry of 36 kg/c, 2
80mm x 150mm x 25mm and 90mm at the pressure of
Pressure molded into a ring shape of 0 ma x 2400 mm x 25 mm,
The obtained molded body was cured for 3 days at a temperature of 25°C and a relative humidity of 90%, and then dried at a temperature of 105°C for an hour to obtain a molded body. 1
A specimen was obtained by firing at 000 to 1150°C for 0.5 to 5 hours.
得られた供試体の緒特性を第１表に併記する。The properties of the obtained specimens are also listed in Table 1.
［発明の効果］
本発明による低膨張質耐火板は比較品に比べ耐熱衝撃性
に優れており、熱衝撃の応力によるクラックの発生が起
こり難い。[Effects of the Invention] The low-expansion fireproof plate according to the present invention has superior thermal shock resistance compared to comparative products, and is less likely to generate cracks due to stress due to thermal shock.
Claims (2)
、スポジュウメン及びフューズドシリカよりなる群から
選択された１種または２種以上を６０〜８０重量％、セ
ピオライト０〜８重量％及びセルロース繊維０〜８重量
％からなり且つセピオライトとセルロース繊維の合計量
が３〜１０重量％の範囲内にある固形分をもつスラリー
を加圧脱水成形することにより得られる成形体であって
且つ焼成されていることを特徴とする低膨張質耐火板。1. 10 to 40% by weight of alumina cement, 60 to 80% by weight of one or more selected from the group consisting of petalite, spodumene, and fused silica, 0 to 8% by weight of sepiolite, and 0 to 8% by weight of cellulose fiber. A molded product obtained by pressure dehydration molding of a slurry having a solid content in which the total amount of sepiolite and cellulose fibers is in the range of 3 to 10% by weight, and is characterized by being fired. Low expansion fireproof board.
する請求項１記載の低膨張質耐火板。2. The low expansion fireproof board according to claim 1, wherein up to 10% of alumina-silica fiber is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1032769A JPH02212358A (en) | 1989-02-14 | 1989-02-14 | Low expansion refractory board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1032769A JPH02212358A (en) | 1989-02-14 | 1989-02-14 | Low expansion refractory board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02212358A true JPH02212358A (en) | 1990-08-23 |
Family
ID=12368049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1032769A Pending JPH02212358A (en) | 1989-02-14 | 1989-02-14 | Low expansion refractory board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02212358A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997006117A1 (en) * | 1995-08-04 | 1997-02-20 | Cosmo Clay & Ceramics Co., Ltd. | Synthetic clay for ceramics and process for preparing the same |
| US5656075A (en) * | 1995-05-10 | 1997-08-12 | W. R. Grace & Co.-Conn. | Control of expansion in concrete due to alkali silica reaction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4891114A (en) * | 1972-01-27 | 1973-11-27 | ||
| JPS5233906A (en) * | 1975-09-12 | 1977-03-15 | Fuoseko Japan Rimitetsudo Yuug | Manufacture of nonnburned magnesia refractory heattinsulating moldings |
| JPS5722191A (en) * | 1980-07-17 | 1982-02-05 | Shinagawa Refractories Co | Refractory heat-insulating board |
| JPS63265857A (en) * | 1987-04-24 | 1988-11-02 | Toppan Printing Co Ltd | Production of low expansion substrate |
-
1989
- 1989-02-14 JP JP1032769A patent/JPH02212358A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4891114A (en) * | 1972-01-27 | 1973-11-27 | ||
| JPS5233906A (en) * | 1975-09-12 | 1977-03-15 | Fuoseko Japan Rimitetsudo Yuug | Manufacture of nonnburned magnesia refractory heattinsulating moldings |
| JPS5722191A (en) * | 1980-07-17 | 1982-02-05 | Shinagawa Refractories Co | Refractory heat-insulating board |
| JPS63265857A (en) * | 1987-04-24 | 1988-11-02 | Toppan Printing Co Ltd | Production of low expansion substrate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5656075A (en) * | 1995-05-10 | 1997-08-12 | W. R. Grace & Co.-Conn. | Control of expansion in concrete due to alkali silica reaction |
| WO1997006117A1 (en) * | 1995-08-04 | 1997-02-20 | Cosmo Clay & Ceramics Co., Ltd. | Synthetic clay for ceramics and process for preparing the same |
| US5763345A (en) * | 1995-08-04 | 1998-06-09 | Cosmo Clay & Ceramics Co., Ltd. | Synthetic clay for ceramics and process for production thereof |
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