JPH03205372A - Plastic refractory - Google Patents
Plastic refractoryInfo
- Publication number
- JPH03205372A JPH03205372A JP1344035A JP34403589A JPH03205372A JP H03205372 A JPH03205372 A JP H03205372A JP 1344035 A JP1344035 A JP 1344035A JP 34403589 A JP34403589 A JP 34403589A JP H03205372 A JPH03205372 A JP H03205372A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- weight
- raw material
- fine powder
- aluminum orthophosphate
- 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
- 239000000843 powder Substances 0.000 claims abstract description 16
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims abstract description 13
- 150000007513 acids Chemical class 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000004927 clay Substances 0.000 claims abstract description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000004327 boric acid Substances 0.000 claims abstract description 3
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 3
- 239000011819 refractory material Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000004898 kneading Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004822 Hot adhesive Substances 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- VYQNWZOUAUKGHI-UHFFFAOYSA-N monobenzone Chemical compound C1=CC(O)=CC=C1OCC1=CC=CC=C1 VYQNWZOUAUKGHI-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、プラスチック耐火物に関し、特にバインダ
ーの主或分としてオルソリン酸アルミニウムを用いたプ
ラスチック耐火物に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to plastic refractories, and particularly to plastic refractories using aluminum orthophosphate as a main portion of the binder.
従来のプラスチック耐火物には、リン酸系バインダーが
使用されていて、特に第一リン酸アルミニウムの粉末お
よび溶液が広く使用されている。Conventional plastic refractories use phosphoric acid binders, and in particular monobasic aluminum phosphate powders and solutions are widely used.
耐火骨材や耐火微粉中のアルミナ、アルカリ土類等のア
ルカリ物質との反応が活性で時間の経過とともに硬化が
進み、作業性の劣化をきたす。例えば、ある種のリン酸
系化合物を用いたバインダーを使用したプラスチック耐
火物は、耐火原料と混合した日から３０日程度経過する
と、作業性が適性値より低くなり、作業に支障をきたし
、従って、原料を大量に混合させて保管しておくことが
できず、納期払出し管理等に支障が生していた。Reactions with alkaline substances such as alumina and alkaline earth metals in refractory aggregates and refractory fine powders are active, resulting in hardening and deterioration of workability over time. For example, plastic refractories that use binders containing certain phosphoric acid compounds become less workable than the appropriate value after about 30 days from the day they are mixed with refractory raw materials, causing problems in the work process. However, it was not possible to mix and store a large amount of raw materials, which caused problems in managing delivery dates and other matters.
又、従来のリン酸系バインダーは吸湿性が大きく、さら
に分子中の末端○Ｈ基の存在により、熱間強度が小さい
等の欠点がある。Further, conventional phosphoric acid binders have drawbacks such as high hygroscopicity and low hot strength due to the presence of terminal ○H groups in the molecules.
この発明は上記従来の課題に鑑みて提案されたものであ
って、長期に亘って適性な作業性値を保つことが出来る
プラスチック耐火物を提供することを目的とするもので
ある。This invention was proposed in view of the above-mentioned conventional problems, and an object thereof is to provide a plastic refractory that can maintain appropriate workability values over a long period of time.
この発明は上記課題を解決するために以下の手段を採用
している。即ち、粒度調整された１種以上の耐火骨材５
０〜７０重量％と、粒子径７４μ以下の耐火性微粉２７
〜４２重量％と、粘土質微粉３〜８重量％とを配合した
耐火材原料に対し、バインダーとして外掛３〜８重量％
のオルソリン酸アル藁ニウムと外掛０．１〜３重量％の
一種以上の酸性化合物とを添加したものである。This invention employs the following means to solve the above problems. That is, one or more types of refractory aggregate 5 whose particle size has been adjusted
0 to 70% by weight and a refractory fine powder with a particle size of 74μ or less27
-42% by weight and 3-8% by weight of clay fine powder, and 3-8% by weight of outer layer as a binder.
of aluminum orthophosphate and 0.1 to 3% by weight of one or more acidic compounds.
上記酸性化合物としては、硼酸又はシュウ酸あるいはそ
の両者を適量ずつ加え合わせて用いると特に効果がある
。As the acidic compound, it is particularly effective to use boric acid, oxalic acid, or both in combination in appropriate amounts.
耐火骨材としては例えば粒径５ｍｍ以下に調整されたア
ル湾ナ質原料が５０重量％〜７０重量％の範囲で使用さ
れる。耐火骨材が５０重量％より少ないと粒度構或上微
粉リソチとなり、充填性が低下する。逆に、７０重量％
より多くなると粗粒リッチとなり、この場合にも充填性
のよい施工体を得ることが出来ない。As the refractory aggregate, for example, alba-based raw material adjusted to a particle size of 5 mm or less is used in a range of 50% to 70% by weight. If the amount of refractory aggregate is less than 50% by weight, the particle size structure becomes fine and the filling properties are reduced. Conversely, 70% by weight
If the amount increases, the content becomes rich in coarse grains, and in this case as well, a construction body with good filling properties cannot be obtained.
耐火微粉としては粒子径が７４μ以下の例えばアルξナ
質微粉を２７〜４２重量％用いるのが適当である。この
範囲を逸脱すると作業性を損なうことになり、また、上
記骨材との関係上、密充填の耐火物が得られない。As the refractory fine powder, it is appropriate to use, for example, alumina fine powder having a particle diameter of 74 μm or less in an amount of 27 to 42% by weight. If it deviates from this range, workability will be impaired, and due to the relationship with the above-mentioned aggregate, a densely packed refractory will not be obtained.
粘土質微粉は作業性を向上させるために３〜８重量％配
合される。この粘土質微粉が３重量％未満であると、充
分な作業性を確保することが困難であり、また、８重量
％を超えると耐蝕性が低下する。The clay fine powder is added in an amount of 3 to 8% by weight to improve workability. If the clayey fine powder is less than 3% by weight, it is difficult to ensure sufficient workability, and if it exceeds 8% by weight, corrosion resistance will be reduced.
上記骨材と、耐火性微粉と粘土質微粉の合計を１００重
量％とじ、更に、以下の組成よりなるバインダーが添加
される。The total of the above aggregate, refractory fine powder and clay fine powder is 100% by weight, and a binder having the following composition is further added.
オルソリン酸アルミニウムは熱間での接着性、強度及び
耐蝕性を付与するためにハインダーの主戒分として使用
される。このオルソリン酸アルミニウムの添加量は上記
耐火材原料に対して外掛で３〜８重量％が適量である。Aluminum orthophosphate is used as a key ingredient in the binder to provide hot adhesion, strength and corrosion resistance. The appropriate amount of aluminum orthophosphate to be added is 3 to 8% by weight based on the raw material for the refractory material.
オルソリン酸アルミニウムの添加量が３重量％未満の場
合は熱間での接着性や強度が劣り、又、８重量％を超え
ると上記接着性あるいは強度を高める効果は飽和状態と
なり、経済的にデメリットとなる。If the amount of aluminum orthophosphate added is less than 3% by weight, hot adhesion and strength will be poor, and if it exceeds 8% by weight, the effect of increasing the adhesion or strength will be saturated, which is an economic disadvantage. becomes.
また、上記オルソリン酸アルミニウムの溶解溶融を促進
する目的で、７５％リン酸水溶液を外掛で１．５〜４重
量％添加することが望ましく、この場合オルソリン酸ア
ルミニウム添加量の５０％程度の添加量が適当である。Furthermore, in order to promote the melting of the aluminum orthophosphate, it is desirable to add 1.5 to 4% by weight of a 75% phosphoric acid aqueous solution, in which case the amount added is approximately 50% of the amount of aluminum orthophosphate added. is appropriate.
上記酸性化合物は上記オルソリン酸アルミニウムによる
作業性の劣化を防止するために添加される。すなわち、
耐火骨材、耐火微粉中のアルミナ、アルカリ土類等との
反応は酸性化合物の添加によって抑えることが出来るこ
とが実験的に確認されている。この酸性化合物の添加量
は外掛０．１〜３重量％が適切である。酸性化吟物の溢
加量が０．１重量％未満である場合は１二記反応を抑え
る機能を発揮せず、３重量％を超えて添加しても、効果
は飽和状態となり、かえって経済的なデメリソトが大き
くなる。The acidic compound is added to prevent deterioration of workability caused by the aluminum orthophosphate. That is,
It has been experimentally confirmed that the reaction with alumina, alkaline earth, etc. in refractory aggregates and refractory fine powders can be suppressed by adding acidic compounds. The appropriate amount of this acidic compound to be added is 0.1 to 3% by weight. If the amount of acidifying substance added is less than 0.1% by weight, it will not function to suppress the 12th reaction, and even if it is added in excess of 3% by weight, the effect will be saturated and it will be more economical. The disadvantages of this increase.
上記のような物質を混合して施工した場合のプラスチッ
ク耐火物はＡｊ！ｚｏ３が６０〜９２重量％であり、Ｓ
ｉＯ２が５〜３７重量％である。Ａβ２０．−Ｓｔ○２
系の耐火物はＡｌ２０３の量が多い程耐蝕性に優れるが
、９２重量％を超えるとＳ ｉ Ｏ ２の量が少なくな
り焼結性に劣り、熱間での強度が低くなる。Plastic refractories constructed by mixing the above substances are Aj! zo3 is 60-92% by weight, S
iO2 is 5-37% by weight. Aβ20. -St○2
The higher the amount of Al203 in the refractory, the better the corrosion resistance, but if it exceeds 92% by weight, the amount of S i O 2 decreases, resulting in poor sinterability and low hot strength.
第１表はこの発明の実施例及び比較例の配合割合と化学
組或、品質試験値を示すものである。また、第１図はこ
の発明に係るプラスチック耐火物と従来のプラスチック
耐火物の作業性の経時変化を示したものである。Table 1 shows the compounding ratios, chemical compositions, and quality test values of Examples and Comparative Examples of the present invention. Moreover, FIG. 1 shows changes over time in workability of the plastic refractory according to the present invention and the conventional plastic refractory.
ヒ記第１表及び第１図からも明らかな如く熱間接着強さ
、熱間強度、耐蝕性等は従来と遜色ないにも拘わらず、
適性な作業性値を６０日以上保つことが出来る。As is clear from Table 1 and Figure 1, although the hot adhesive strength, hot strength, corrosion resistance, etc. are comparable to conventional ones,
Appropriate workability values can be maintained for 60 days or more.
更に、上記に実施例による混練後６０日経過したプラス
チック耐火物をＲＨ脱ガス浸漬管の補修用として使用し
たところ、作業性、及び耐用性とも問題は生じなかった
。Furthermore, when the plastic refractories 60 days after kneading according to the above examples were used for repairing RH degassing immersion pipes, no problems occurred with respect to workability or durability.
尚、第１表に於いて熱間接着強さは、ハイアルミナキャ
スタブル耐火物に本願プラスチック耐火物を接着させた
ＪＩＳに準じた大きさの試料を１５００℃×３時間熱処
理した後に測定した。In Table 1, the hot bonding strength was measured after heat-treating a JIS-compliant sample in which the plastic refractory of the present invention was adhered to a high alumina castable refractory at 1500° C. for 3 hours.
熱間強度はｌ４００℃での曲げ強さを測定した。The hot strength was determined by measuring the bending strength at 400°C.
耐蝕性試験はロータリー式耐蝕性試験方法を用いた。The rotary corrosion resistance test method was used for the corrosion resistance test.
作業性値は、耐火モルタルの稠度試験方法（ＪＩ ＳＲ
２ ５ ０ ６−６ ４）に準じて行い、初期値を１０
０とし経過日数に伴う測定値を指数を表した。The workability value is based on the consistency test method for refractory mortar (JI SR
2 5 0 6-6 Perform according to 4) and set the initial value to 10
The measured value with the number of days elapsed was set to 0 and expressed as an index.
く以下余白〉
第
■
表
〔発明の効果〕
以上説明したようにこの発明はプラスチック耐火物のバ
インダーとして、オルソリン酸アルミニウム、リン酸と
一種以上の酸性化合物を添加しているので、耐火骨材、
耐火微粉中のアル果ナ、アルカリ土類等との反応による
硬化現象を抑えることが出来、プラスチック耐火物の作
業性値を長期に亘って適性値に保つことが出来、従って
、在庫管理、納期あるいは払出し管理が容易となる効果
がある。Table ■ [Effects of the Invention] As explained above, in this invention, aluminum orthophosphate, phosphoric acid, and one or more acidic compounds are added as binders for plastic refractories, so refractory aggregates,
It is possible to suppress the hardening phenomenon caused by the reaction with alkaline, alkaline earth, etc. in the refractory fine powder, and it is possible to maintain the workability value of plastic refractories at an appropriate value over a long period of time. Alternatively, it has the effect of facilitating payout management.
第１図はこの発明に係るプラスチック耐火物と従来のプ
ラスチック耐火物との作業性の経時変化を示したもので
ある。FIG. 1 shows changes in workability over time between the plastic refractory according to the present invention and the conventional plastic refractory.
Claims (2)
量％と、粒子径７４μ以下の耐火性微粉２７〜４２重量
％と、粘土質微粉３〜８重量％とを配合した耐火材原料
に対し、バインダーとして外掛３〜８重量％のオルソリ
ン酸アルミニウムと外掛０．１〜３重量％の一種以上の
酸性化合物とを添加したことを特徴とするプラスチック
耐火物。(1) Refractory material containing 50 to 70% by weight of one or more types of refractory aggregate whose particle size has been adjusted, 27 to 42% by weight of refractory fine powder with a particle size of 74μ or less, and 3 to 8% by weight of clay fine powder. 1. A plastic refractory characterized in that 3 to 8% by weight of aluminum orthophosphate and 0.1 to 3% by weight of one or more acidic compounds are added as a binder to a raw material.
請求項１に記載のプラスチック耐火物。(2) The plastic refractory according to claim 1, wherein the acidic compound is boric acid and/or oxalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344035A JPH03205372A (en) | 1989-12-29 | 1989-12-29 | Plastic refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1344035A JPH03205372A (en) | 1989-12-29 | 1989-12-29 | Plastic refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03205372A true JPH03205372A (en) | 1991-09-06 |
Family
ID=18366157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1344035A Pending JPH03205372A (en) | 1989-12-29 | 1989-12-29 | Plastic refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03205372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2550243A2 (en) | 2010-03-23 | 2013-01-30 | Stellar Materials, Inc. | Refractory composition and process for forming article therefrom |
| JP2014055093A (en) * | 2012-09-14 | 2014-03-27 | Shinagawa Refractories Co Ltd | Plastic refractory |
-
1989
- 1989-12-29 JP JP1344035A patent/JPH03205372A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2550243A2 (en) | 2010-03-23 | 2013-01-30 | Stellar Materials, Inc. | Refractory composition and process for forming article therefrom |
| US9586866B2 (en) * | 2010-03-23 | 2017-03-07 | Stellar Materials Incorporated | Refractory composition and process for forming article therefrom |
| EP2550243B1 (en) * | 2010-03-23 | 2019-12-18 | Stellar Materials, LLC | Refractory composition |
| EP3636622A1 (en) * | 2010-03-23 | 2020-04-15 | Stellar Materials, LLC | Refractory composition and process for forming article therefrom |
| JP2014055093A (en) * | 2012-09-14 | 2014-03-27 | Shinagawa Refractories Co Ltd | Plastic refractory |
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