JPH03265572A - Castable refractory - Google Patents
Castable refractoryInfo
- Publication number
- JPH03265572A JPH03265572A JP2064627A JP6462790A JPH03265572A JP H03265572 A JPH03265572 A JP H03265572A JP 2064627 A JP2064627 A JP 2064627A JP 6462790 A JP6462790 A JP 6462790A JP H03265572 A JPH03265572 A JP H03265572A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- water
- pva
- salt
- added
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011819 refractory material Substances 0.000 claims abstract description 18
- 150000003839 salts Chemical class 0.000 claims abstract description 18
- 238000004880 explosion Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005185 salting out Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000002166 wet spinning Methods 0.000 abstract description 3
- 239000007832 Na2SO4 Substances 0.000 abstract 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 1
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 1
- 235000011152 sodium sulphate Nutrition 0.000 abstract 1
- 238000001035 drying Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011823 monolithic refractory Substances 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229910052845 zircon Inorganic materials 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel 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〕
本発明は、流し込み不定形耐火物、特に、取鍋ＤＨＲＨ
，タンデイツシュ用として好適なキャスタブル耐火物に
関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cast monolithic refractory, particularly a ladle DHRH.
, relates to a castable refractory suitable for use in tandem.
従来からキャスタブルを初めとする不定形耐火物は、加
熱乾燥時の爆裂という大きな問題を抱えている。Monolithic refractories such as castable refractories have traditionally had the major problem of exploding when heated and dried.
爆裂現象は、乾燥中に発生する水蒸気の圧力が耐火物の
引張り強度を越えることによって生じるものであり、特
に近年のキャスタブル耐火物の緻密化指向により、乾燥
時の水蒸気圧力は非常に高くなっており、爆裂の抑制に
は細心の注意が払われている。The explosion phenomenon occurs when the pressure of the water vapor generated during drying exceeds the tensile strength of the refractory.In particular, with the recent trend toward densification of castable refractories, the water vapor pressure during drying has become extremely high. Great care is taken to prevent explosions.
材料面で爆裂を抑制する手段として、特開昭５２−６２
１３３号公報には、無機繊維を添加して施工体の通気率
を上げ、耐爆裂性を向上させる塩基性耐火物が提案され
ている。As a means of suppressing explosion from the material perspective, JP-A-52-62
Japanese Patent No. 133 proposes a basic refractory that adds inorganic fibers to increase the air permeability of the construction body and improve the explosion resistance.
また、特公昭６３−３９６号公報には、ポリエステル繊
維及び／又はビニロン繊維を添加して不定形耐火物の耐
爆裂性を改善させる手段が提案されている。Furthermore, Japanese Patent Publication No. 63-396 proposes a method for improving the explosion resistance of monolithic refractories by adding polyester fibers and/or vinylon fibers.
従来提案されている耐爆裂性の改善のために配合される
無機繊維、有機繊維共通の問題点として、■ 材料中へ
の繊維の分散性、
■ 混練水添加時の繊維の凝集、
■ 添加水分の増大
等が挙げられる。Conventionally proposed problems common to inorganic and organic fibers that are blended to improve explosion resistance include: ■ Dispersibility of fibers in the material; ■ Agglomeration of fibers when kneading water is added; ■ Added moisture. An example of this is an increase in
無機繊維に比較して有機繊維は、■の材料中への繊維の
分散性については優れているものの、■と■の１ａＭｋ
の凝集と添加水分の増大については深刻な問題であり、
とくに低水分での施工を前提とする緻密質キャスタブル
においては致命的な欠陥となる。Compared to inorganic fibers, organic fibers are superior in terms of the dispersibility of fibers into the material (■), but the 1aMk of ■ and ■
The agglomeration of water and the increase in added water are serious problems.
This is a fatal defect, especially for dense castables that are intended for construction in low moisture conditions.
すなわち、添加水分の増大は、緻密質キャスタブルの強
度特性、耐食性の大幅低下を生じせしめ、また水添加時
に繊維が部分的に凝集した場合には、乾燥時に大きな空
隙を生じることから、局部的な異常溶損の原因となる。In other words, an increase in added water causes a significant decrease in the strength properties and corrosion resistance of dense castable, and if the fibers partially aggregate when water is added, large voids are created when drying. This may cause abnormal melting.
本発明は、かかる不定形耐火物の加熱乾燥時の爆裂防止
のためのｍ維添加における問題点を解消するもので、添
加水分の増大、耐食性の低下をもたらすことな（、耐爆
裂性が改善されたキャスタブル耐火物、特に緻密質キャ
スタブルを提供するものである。The present invention solves the problems in adding m-fiber to prevent explosion during heating and drying of such monolithic refractories. The present invention provides castable refractories, especially dense castables.
本発明は、水−塩析性を有する塩−ＰＶＡからなる含水
、含塩のＰＶＡ繊維を耐火材１００重量％に対して０．
０５〜０．５重量％添加することによって上記課題を解
決した。The present invention uses water-containing, salt-containing PVA fibers made of salt-PVA having water-salting-out properties at 0.0% by weight based on 100% by weight of the refractory material.
The above problem was solved by adding 0.05 to 0.5% by weight.
キャスタブル耐火材に添加して耐火材の耐爆裂性の向上
と添加水分の増大抑制を両立させた有機繊維としては、
親水性に優れたものである必要がある。Organic fibers that can be added to castable refractories to improve the explosion resistance of the refractories and suppress the increase in added moisture are:
It must have excellent hydrophilicity.
本発明は、親水性に優れた繊維について種々検討した結
果、水−塩析性を有する塩−ＰＶＡからなる含水、含塩
のＰＶＡ繊維が優れており、この特性を有するＰＶＡ繊
維の適量添加により、優れた耐爆裂性の向上と添加水分
の増大抑制を両立させる特性が得られることを見い出し
、完成したものである。As a result of various studies on fibers with excellent hydrophilicity, the present invention found that water- and salt-containing PVA fibers made of salt-PVA with water-salting-out properties are excellent. , they discovered that it was possible to obtain properties that both improved explosion resistance and suppressed the increase in added moisture.
親水性の尺度は、繊維の含水率で判断することができる
が、ポリエチレン、ポリエステル、ポリ塩化ビニル等は
０〜数％、通常のＰＶＡ繊維では数％の含水率であり、
通常のＰＶＡ繊維そのものが特に親水性に優れたものと
は言えない。The measure of hydrophilicity can be determined by the moisture content of the fiber, which is 0 to several percent for polyethylene, polyester, polyvinyl chloride, etc., and several percent for ordinary PVA fiber.
Ordinary PVA fiber itself cannot be said to have particularly excellent hydrophilicity.
本発明において耐火材に添加されるＰＶＡ繊維としては
湿式紡糸法の過程で得られたものが適しており、ＰＶＡ
と水の比率はほぼ１：１の組成からなり極めて親水性に
富むものである。In the present invention, the PVA fibers added to the refractory material are suitably those obtained in the process of wet spinning.
The ratio of water to water is approximately 1:1, making it extremely hydrophilic.
このＰＶＡ固形分維はキャスタブル耐火物に使用した際
に、添加水分の増大を抑制し、特に緻密質キャスタブル
に対し有効である。When this PVA solid fiber is used in castable refractories, it suppresses the increase in added moisture, and is particularly effective for dense castables.
本発明において添加される有機１７ａ維は、さらに繊維
間に塩析効果を有する塩類、すなわち、電解質塩類の存
在が不可欠である。この塩析効果を有する塩類はキャス
タブル耐火物に水を添加した際の繊維の凝集抑制に効果
的である。繊維間に電解質塩類が存在した場合、繊維の
水素結合を抑制し、凝集を抑えるものと推察される。こ
の点から、塩類は繊維表面に均一に存在する必要があり
、ＰＶＡ１ＥＮ維紡糸過程で使用する１ｌａ２ｓＯ４等
の塩析効果を有するものが適している。The organic 17a fiber added in the present invention further requires the presence of salts having a salting-out effect between the fibers, that is, electrolyte salts. Salts having this salting-out effect are effective in suppressing fiber aggregation when water is added to castable refractories. It is presumed that when electrolyte salts exist between the fibers, they suppress the hydrogen bonding of the fibers and suppress agglomeration. From this point of view, the salt must be present uniformly on the fiber surface, and a salt having a salting-out effect, such as 1la2sO4 used in the PVA1EN fiber spinning process, is suitable.
Ｎａ２５Ｌ等の塩の含有量は、紡糸洛中の塩濃度によっ
て決定するが、ＰＶＡ固形分に対して２０重量％程度が
繊維の水中での凝集抑制という点で良好である。The content of salt such as Na25L is determined by the salt concentration in the spinning solution, but a content of about 20% by weight based on the PVA solid content is good in terms of suppressing aggregation of fibers in water.
本発明で使用される繊維は含水、含塩のＰＶＡ繊維であ
ること以外は、格別限定されるものではないが、キャス
タブル耐火材料への分散性及び耐爆裂性向上効果の点か
らは、ｍ維径ＩＤ（デニール）、繊維長さ３〜５士程度
が好ましい。The fibers used in the present invention are not particularly limited except that they are water-containing and salt-containing PVA fibers, but from the viewpoint of dispersibility in castable refractory materials and the effect of improving explosion resistance, m-fibers are preferred. The diameter ID (denier) and fiber length are preferably about 3 to 5 mm.
添加量に関しては、耐火材１００重量％に対して０．０
５〜０．５重量％に限定されるが、これは０．０５重量
％より少ない範囲では耐爆裂性の向上効果に乏しく、ま
た０、５重量％より多い範囲ではいかに含水、含塩ＰＶ
Ａ繊維といえども、キャスタフル耐火物の添加水分が多
くなることから不適である。Regarding the amount added, it is 0.0% based on 100% by weight of the refractory material.
It is limited to 5 to 0.5% by weight, but if it is less than 0.05% by weight, it will have a poor effect on improving the explosion resistance, and if it is more than 0.5% by weight, it will not be possible to improve water-containing or salt-containing PV.
Although A fiber is used, it is unsuitable because it increases the amount of water added to Castaful refractories.
本発明に使用する骨材及びバインダーは、特に限定され
るものではなく、アルミナ、ボーキサイト、シャモット
、珪石、ロー石、ジルコン、マグネジ乙 スピネル、ク
ロム鉱等の一般耐火物原槻として公知のものは使用する
ことが可能であり、バインダー類についても同様である
。The aggregates and binders used in the present invention are not particularly limited, and include those known as general refractory materials such as alumina, bauxite, chamotte, silica, lowite, zircon, magnetic screw spinel, and chromite. The same applies to binders.
第１表は試験に用いたジルコン質キャスタブルの配合構
成である。Table 1 shows the composition of the zircon castable used in the test.
第２表は種々の繊維を第１表のキャスタブルに添加し、
耐爆裂性、耐食性を調査した結果である。Table 2 shows that various fibers are added to the castables of Table 1,
This is the result of investigating explosion resistance and corrosion resistance.
繊維の径及び長さはそれぞれＩＤ（デニール）、３闘で
共通である。実施例１，２及び比較例６゜７に使用のも
のは、含水、含塩のＰＶＡ繊維であり、水／ Ｎａ２Ｓ
Ｏ４／ Ｐ Ｖ Ａの比率は４０ ／２０ ／４０であ
る。The diameter and length of the fibers are ID (denier) and the same for all three types. The fibers used in Examples 1 and 2 and Comparative Examples 6 and 7 were water-containing and salt-containing PVA fibers, with water/Na2S
The O4/PVA ratio is 40/20/40.
実施例１．２は本発明によるキャスタブル耐火物であり
、比較例１の繊維無添加品に比較して、耐爆裂性は明ら
かに改善され、添加水分の増大。Example 1.2 is a castable refractory according to the present invention, and compared to the product of Comparative Example 1 without fiber addition, the explosion resistance is clearly improved and the amount of added water is increased.
耐食性の低下もほとんどＢ２６られない。比較例２〜５
は代表的な繊維の試験結果であるが、いずれも添加水分
の増大をもたらし、耐食性の低下を生じることから不適
である。There is almost no decrease in corrosion resistance. Comparative examples 2 to 5
These are the test results for typical fibers, but all of them are unsuitable because they result in an increase in added moisture and a decrease in corrosion resistance.
また、７００℃急加熱という条件では爆裂を生じている
が、これは、水添加時に繊維が部分的に凝集し、繊維の
均一分散という点で劣り、繊維添加の効果が充分でない
たｔと考えられる。この点から、本発明の塩析の効果が
認められる。In addition, explosions occurred under the condition of rapid heating at 700℃, but this is thought to be due to the fibers partially coagulating when water was added, resulting in poor uniform dispersion of the fibers, and the effect of adding fibers was not sufficient. It will be done. From this point of view, the effect of salting out according to the present invention is recognized.
比較例６．７は本発明の範囲外の繊維添加量であり、耐
爆裂性向上効果と耐食性低下抑制を両立させることがで
きず不適である。Comparative Examples 6 and 7 have fiber addition amounts outside the range of the present invention, and are unsuitable because they cannot achieve both the effect of improving explosion resistance and suppressing the decrease in corrosion resistance.
以上のように、本発明による効果は絶大であり、各工業
炉の安定稼動を可能にし、また乾燥時間の短縮によるメ
リットも得られた。As described above, the effects of the present invention are tremendous, enabling stable operation of various industrial furnaces, and also providing the advantage of shortening drying time.
第１表 ジルコン質キャスタブルの配合構成（以下、こ
の頁余白）
〔発胡の効果〕
本発明によって以下の効果を奏することができる。Table 1 Blend composition of zircon castable (hereinafter referred to as the margin of this page) [Effects of hatching] The following effects can be achieved by the present invention.
（１）急加熱乾燥時の爆裂を防止し、かつ添加繊維の分
散性の向上からキャスタブル耐火物の耐食性。(1) Corrosion resistance of castable refractories due to prevention of explosion during rapid heating and drying and improved dispersibility of added fibers.
強度等が向上する。Improves strength etc.
（２）耐火骨材の基本組成に回答影響を与えない。(2) Does not affect the basic composition of refractory aggregate.
（３）施工後の乾燥時間を短縮することができ、全体の
施工能率が上がる。(3) Drying time after construction can be shortened, increasing overall construction efficiency.
（４）施工後の工業炉の長期安定操業が可能となる。(4) Long-term stable operation of the industrial furnace after construction is possible.
Claims (1)
のＰＶＡ繊維を耐火材１００重量％に対して、０．０５
〜０．５重量％添加してなるキャスタブル耐火物。1. Water-salt having salt-out property-PVA water-containing, salt-containing PVA fiber is added to 100% by weight of the refractory material at 0.05% by weight.
A castable refractory made by adding ~0.5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2064627A JP2849154B2 (en) | 1990-03-14 | 1990-03-14 | Castable refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2064627A JP2849154B2 (en) | 1990-03-14 | 1990-03-14 | Castable refractories |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03265572A true JPH03265572A (en) | 1991-11-26 |
| JP2849154B2 JP2849154B2 (en) | 1999-01-20 |
Family
ID=13263684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2064627A Expired - Fee Related JP2849154B2 (en) | 1990-03-14 | 1990-03-14 | Castable refractories |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2849154B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081373A1 (en) * | 2010-12-15 | 2012-06-21 | 黒崎播磨株式会社 | Castable refractory |
| JP2021066620A (en) * | 2019-10-18 | 2021-04-30 | 日本製鉄株式会社 | Method for producing castable refractory |
| CN113248854A (en) * | 2021-05-21 | 2021-08-13 | 暨南大学 | Complex/PVA composite material and preparation method and application thereof |
-
1990
- 1990-03-14 JP JP2064627A patent/JP2849154B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081373A1 (en) * | 2010-12-15 | 2012-06-21 | 黒崎播磨株式会社 | Castable refractory |
| JP2021066620A (en) * | 2019-10-18 | 2021-04-30 | 日本製鉄株式会社 | Method for producing castable refractory |
| CN113248854A (en) * | 2021-05-21 | 2021-08-13 | 暨南大学 | Complex/PVA composite material and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2849154B2 (en) | 1999-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0026666B1 (en) | Method of producing sintered zirconia article | |
| EP0522722A1 (en) | Inorganic ceramic papers | |
| CN112341161B (en) | Anti-stripping unburned magnesium-calcium-carbon brick and preparation method thereof | |
| JPH03265572A (en) | Castable refractory | |
| CA1202332A (en) | Unburned magnesia-carbon refractory | |
| JPH0236547B2 (en) | ||
| US5635120A (en) | Process for forming a mullite-zirconia engine part | |
| JPH0446065A (en) | Castable refractories | |
| JP2004505877A (en) | Bonded fiber material | |
| JPH06316467A (en) | Production of incombustible molding | |
| JPH02225380A (en) | Water-hardening amorphous refractory | |
| JPS6031796B2 (en) | Zirconia sintered body | |
| JP2872670B2 (en) | Irregular refractories for lining of molten metal containers | |
| JPH03229785A (en) | High-temperature gasket and its manufacture | |
| JP2001278676A (en) | Inorganic fiber reinforced article | |
| JPH0794347B2 (en) | Insulation | |
| KR100213319B1 (en) | Refractory composition | |
| JPH07284916A (en) | Upper nozzle brick for sliding gate | |
| JPH10158072A (en) | Magnesia-carbon castable refractory and its applied body | |
| JPH03247556A (en) | High-temperature burning jig | |
| JPH02212369A (en) | Refractory board | |
| RU2040510C1 (en) | Mullite-romeite refractory material | |
| JPH0226867A (en) | Production of graphite electrode material | |
| JPH03234890A (en) | Sheet for high-temperature use | |
| JPH0455360A (en) | Magnesia-based superhigh temperature refractory |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081106 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091106 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |