JPH04119980A - Carbon-containing refractory applied with oxidation resistance - Google Patents
Carbon-containing refractory applied with oxidation resistanceInfo
- Publication number
- JPH04119980A JPH04119980A JP23912590A JP23912590A JPH04119980A JP H04119980 A JPH04119980 A JP H04119980A JP 23912590 A JP23912590 A JP 23912590A JP 23912590 A JP23912590 A JP 23912590A JP H04119980 A JPH04119980 A JP H04119980A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- glass
- refractory
- containing refractory
- alkoxide
- 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
- 230000003647 oxidation Effects 0.000 title claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 36
- 229910052799 carbon Inorganic materials 0.000 title claims description 36
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
- 150000004703 alkoxides Chemical class 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052845 zircon Inorganic materials 0.000 abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 13
- 239000011819 refractory material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 238000005470 impregnation Methods 0.000 description 10
- 238000007654 immersion Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、浸漬ノズル、ロングノズル等予熱をして使用
する製鋼用炭素含有耐火物において、予熱時の雰囲気温
度６００℃〜１４００℃の範囲で酸化による損耗をする
ことなく好適に使用しろる炭素含有耐火物に関するもの
である。Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to carbon-containing refractories for steel making that are used after preheating, such as immersion nozzles and long nozzles, and which are used at ambient temperatures in the range of 600°C to 1400°C during preheating. The present invention relates to a carbon-containing refractory that can be suitably used in industrial applications without suffering damage due to oxidation.
（従来の技術）
従来、この種の炭素含有耐火物は、鋳造初期の熱衝撃に
対するスポーリング防止として予熱されている。このた
め、予熱時の酸化防止対策には、これら耐火物の表面に
ガラスを主成分とする酸化防止剤が刷毛塗り、またはス
プレー塗布されて使用されていた。これらの酸化防止剤
の材料組成や塗布方法なども種々検討されており、例え
ば、特開昭５４−４７７１２号公報では、炭素質耐火物
表面にＳｉｎ、を主成分とする被覆層とさらにその表面
にＳｉｎ、、Ａｎ２０ａ ＋ Ｋ２０ ＋ Ｎ ８２０
１Ｂ２０、を含有する被覆層を積層させることにより、
予熱時に炭素含有耐火物表面にガラス層が被覆され、酸
素との接触が遮断される等が報告されている。(Prior Art) Conventionally, this type of carbon-containing refractory is preheated to prevent spalling against thermal shock at the initial stage of casting. Therefore, as a measure to prevent oxidation during preheating, an antioxidant containing glass as a main component has been applied by brushing or spraying onto the surface of these refractories. Various studies have been conducted on the material composition and application method of these antioxidants. For example, in Japanese Patent Application Laid-Open No. 54-47712, a coating layer containing Sin as a main component on the surface of a carbonaceous refractory and a coating layer on the surface Sin,, An20a + K20 + N 820
By laminating a coating layer containing 1B20,
It has been reported that the surface of carbon-containing refractories is coated with a glass layer during preheating, blocking contact with oxygen.
（発明が解決しようとする課題）
これらガラス系酸化防止剤は、均質に被覆が行われてい
れば効果は発揮されるが、１２００℃以上での予熱時に
炭素の濡れ性の悪さに起因するガラスの凝集等が発生す
ると被覆層が一部破れ炭素含有耐火物の局部酸化が発生
し、著しい時には実際の使用時に耐火物の剥離あるいは
破損につながる。また、浸漬ノズルにおいては酸化損耗
により生じた耐火物表面に鋼中のアルミナが付着・析出
し、ノズル内孔閉塞を起こすことがある。(Problems to be Solved by the Invention) These glass-based antioxidants are effective if coated homogeneously, but the glass-based antioxidants are effective when coated uniformly, but the glass-based antioxidants are effective when coated uniformly. When agglomeration occurs, the coating layer is partially torn and local oxidation of the carbon-containing refractory occurs, which in severe cases leads to peeling or breakage of the refractory during actual use. In addition, in a submerged nozzle, alumina in the steel may adhere and precipitate on the refractory surface caused by oxidative wear, causing nozzle inner hole clogging.
従って、本発明は６００〜１４００℃の範囲で良好な耐
酸化性を付与する金属アルコキシドを含浸した高耐酸化
性炭素含有耐火物を提供することにある、
（課題を解決するための手段）
本発明は、浸漬ノズル、ロングノズル等予熱をして使用
する製鋼用炭素含有耐火物において、予熱時の雰囲気温
度６００℃〜１４００℃の範囲で好適に使用できる耐酸
化性を有する炭素含有耐火物を開発すべく、研究を進め
た結果、従来のガラスを主成分とする酸化防止剤を塗布
した炭素含有耐火物の酸化損耗メカニズムを解明し、そ
の知見に基づき、高耐酸化性の炭素含有耐火物を発明し
たものである。Therefore, the present invention is to provide a highly oxidation-resistant carbon-containing refractory impregnated with a metal alkoxide that provides good oxidation resistance in the range of 600 to 1400°C. The present invention provides carbon-containing refractories for steel manufacturing that are used after preheating, such as immersion nozzles and long nozzles, and which have oxidation resistance and can be used suitably at an ambient temperature in the range of 600°C to 1400°C during preheating. As a result of our research, we clarified the oxidation loss mechanism of conventional carbon-containing refractories coated with antioxidants mainly composed of glass, and based on that knowledge, we developed highly oxidation-resistant carbon-containing refractories. was invented.
即ち、本発明は、炭素含有耐火物への含浸剤として金属
アルコキシドを用い、含浸後の炭素含有耐火物を２００
℃以下の温度で加水分解させ、さらにその表面にガラス
系酸化防止剤を塗布したことな特徴とする耐酸化性処理
を施した炭素含有耐火物である。That is, in the present invention, a metal alkoxide is used as an impregnating agent for a carbon-containing refractory, and the carbon-containing refractory after impregnation is
It is a carbon-containing refractory that has been subjected to oxidation-resistant treatment, which is characterized by being hydrolyzed at temperatures below °C and further coated with a glass-based antioxidant.
以下に、本発明の内容について説明する。The content of the present invention will be explained below.
ＡＱ２０３−ＣやＺｒ０２−Ｃ等の炭素含有耐火物にお
いては、酸素あるいは水蒸気と４００’Ｃ以上の温度で
炭素の酸化が開始する。予熱時の酸化防止対策としては
、Ｎａ２Ｏ，に２０．ＡＱ２０３１ Ｓ ｊ○、、Ｚｒ
Ｏ２を構成成分とするガラス系酸化防止剤を塗布し、６
００℃以上でこれを溶融させ炭素含有耐火物表面を被覆
する手法がとられている。In carbon-containing refractories such as AQ203-C and Zr02-C, oxidation of carbon starts when exposed to oxygen or water vapor at a temperature of 400'C or higher. As a measure to prevent oxidation during preheating, use Na2O, 20. AQ2031 S j○,, Zr
Apply a glass-based antioxidant containing O2 as a component, and
A method has been adopted in which the carbon-containing refractory surface is coated by melting it at a temperature of 00° C. or higher.
しかし、この方法は均質にガラス被膜が形成されていれ
ば良いが、ガラスの凝集が発生するとガラス被膜が一部
破れ、局部酸化が起こり、炭素含有耐火物の剥離・破損
が生じる。However, although this method suffices as long as the glass coating is formed homogeneously, when agglomeration of the glass occurs, the glass coating partially breaks, local oxidation occurs, and the carbon-containing refractory material peels off and breaks.
このことから、酸化防止剤として必要な機能は炭素含有
耐火物との濡れ性が良いことであり、そのためには酸化
防止剤が均一に炭素含有耐火物の表面、濡れ性の悪い炭
素及び開気孔を被覆し、外部からの酸素侵入を遮断する
ことが重要である。From this, the necessary function of an antioxidant is to have good wettability with carbon-containing refractories, and for that purpose, the antioxidant must be uniformly distributed over the surface of the carbon-containing refractory, the carbon with poor wettability, and the open pores. It is important to cover the material to prevent oxygen from entering from the outside.
そこで本発明では、炭素含有耐火物とガラス系酸化防止
剤との間の濡れ性を向上させるために結合剤を設けるこ
とを考えた。この結合剤としては、炭素含有耐火物の細
気孔まで浸透し易く、−炭素含有耐火物の表面に均質な
被膜を形成するもの、高温まで熱的に安定なものが望ま
しい。Therefore, in the present invention, we considered providing a binder in order to improve the wettability between the carbon-containing refractory and the glass-based antioxidant. The binder is preferably one that easily penetrates into the pores of the carbon-containing refractory, forms a homogeneous film on the surface of the carbon-containing refractory, and is thermally stable up to high temperatures.
そこで５本発明者らは、この考えから結合剤として液体
で炭素含有耐火物に浸透し易く、かつ予熱時にセラミッ
クス被膜を形成するセラミックゾルの含浸及びアルコー
ル分散の金属アルコキシドの含浸を試みた。炭素含有耐
火物と５ｉｎ２．Ｚｒ５ｉｎ４．ＡＱ、○１．ＺｒＯ，
をそれぞれ含有するセラミックゾル、金属アルコキシド
との濡れ性（含浸性）を調べたところ、 いずれのセラ
ミックスゾルと炭素含有耐火物との接触角が６０〜７０
°であったのに対し、金属アルコキシドの場合瞬時に金
属アルコキシドは炭素含有耐火物に浸透し、炭素含有耐
火物に対して良好な濡れ性を示した。この金属アルコキ
シドの良好な濡れ性は、金属アルコキシドが炭素含有耐
火物に対して密着性が良く均一なセラミックス被膜を形
成することを意味するものである。このことから、結合
剤としては炭素含有耐火物との濡れ性が良いアルコール
分散の金属アルコキシドが好ましい。Based on this idea, the present inventors attempted impregnation with a ceramic sol and an alcohol-dispersed metal alkoxide as a binder, which easily penetrates carbon-containing refractories as a liquid and forms a ceramic film during preheating. Carbon-containing refractory and 5in2. Zr5in4. AQ, ○1. ZrO,
When we investigated the wettability (impregnability) of ceramic sol and metal alkoxide containing each of
In contrast, in the case of metal alkoxide, the metal alkoxide instantly penetrated into the carbon-containing refractory and showed good wettability to the carbon-containing refractory. This good wettability of the metal alkoxide means that the metal alkoxide forms a uniform ceramic coating with good adhesion to the carbon-containing refractory. For this reason, the binder is preferably an alcohol-dispersed metal alkoxide that has good wettability with the carbon-containing refractory.
含浸方法については、真空含浸、あるいは浸漬含浸のい
ずれでもガラス系酸化防止剤の溶融状態及び濡れ性には
問題なく、含浸方法はとくに限定しない。Regarding the impregnation method, either vacuum impregnation or immersion impregnation can be used without any problem in the melting state and wettability of the glass antioxidant, and the impregnation method is not particularly limited.
含浸後は養生することが望ましく、養生終了後２００℃
以下の温′度で熱処理を行い、金属アルコキシドの加水
分解反応を起こさせ、数ｎＩｎ程度の微細な金属水酸化
物が生成し、これが予熱時の昇温段階で酸化物系セラミ
ックス被膜となり、炭素含有耐火物とガラス系酸化防止
剤との結合剤として寄与する。ここで、加水分解の温度
が２００℃を超えると、溶液の突沸が起こり、含浸量が
低減する。従って本発明においては加水分解の温度を２
００℃以下に制限した。After impregnation, it is desirable to cure the temperature at 200°C.
Heat treatment is performed at the following temperature to cause a hydrolysis reaction of the metal alkoxide, and a fine metal hydroxide of several nIn size is generated. Contributes as a binder between the contained refractory and the glass-based antioxidant. Here, when the hydrolysis temperature exceeds 200° C., bumping of the solution occurs and the amount of impregnation is reduced. Therefore, in the present invention, the hydrolysis temperature is set to 2.
The temperature was limited to below 00°C.
ガラス系酸化防止剤の塗布については、従来の方法で良
く、とくに限定しない。本発明で使用する金属アルコキ
シド種としては、ガラス系酸化防止剤とセラミックス被
膜との濡れ性、さらには密層性を良くさせる必要性から
ガラス系酸化防止剤の構成成分であるＳｉＯ２，ＺｒＳ
ｉＯ４，ＡＱｚＯ３＋Ｚｒ○２，３ＡＱ２０３・２Ｓｉ
Ｏ２などを含むものが望ましい。The glass-based antioxidant may be applied by any conventional method and is not particularly limited. The metal alkoxide species used in the present invention include SiO2 and ZrS, which are constituent components of the glass-based antioxidant, in order to improve the wettability between the glass-based antioxidant and the ceramic film, as well as the need to improve the layer density.
iO4,AQzO3+Zr○2,3AQ203・2Si
It is preferable to use one containing O2 or the like.
（実施例）
本発明の実施例として、 ＺｒＳｉＯ４アルコキシドを
含浸したときの試験結果を以下に示す。(Example) As an example of the present invention, test results when impregnated with ZrSiO4 alkoxide are shown below.
４− ＯＸ ４０ Ｘ １６０ ａｎで嵩密度２．２４
、気孔率１５．５％のＡＱ２０．−Ｃ質耐火物に、 Ｚ
ｒＳｉＯ４アルコキシドを減圧下（５ｍｎＨｇ）で３０
分間真空含浸し１５０℃で２４時間熱処理したＡＱ２０
、−Ｃ質耐火物に、 さらにガラス系酸化防止剤を吹き
付は塗布したもの（実施例１）、 ｚｒＳｉＯ。4- Bulk density 2.24 at OX 40 x 160 an
, AQ20. with a porosity of 15.5%. -C grade refractories, Z
rSiO4 alkoxide under reduced pressure (5 mnHg) for 30 min.
AQ20 vacuum impregnated for minutes and heat treated at 150℃ for 24 hours
, -C grade refractory further coated with a glass-based antioxidant (Example 1), zrSiO.
アルコキシドを室温で１０分間浸漬含浸し１５０℃で２
４時間熱処理したＡＱ、０３−Ｃ質耐火物に、さらにガ
ラス系酸化防止剤を吹き付は塗布したもの（実施例２）
、直接ガラス系酸化防止剤を吹き付は塗布したもの（従
来例１）を、それぞれ１４００℃、３時間、大気中で暴
露試験を実施した。The alkoxide was immersed for 10 minutes at room temperature and then heated to 150℃ for 2 hours.
AQ, 03-C refractories heat-treated for 4 hours and further sprayed with a glass-based antioxidant (Example 2)
and those to which a glass-based antioxidant was directly sprayed (Conventional Example 1) were subjected to an exposure test in the atmosphere at 1400° C. for 3 hours.
ここで、ｚｒＳｉＯ，アルコキシドとはイソプロパツー
ル溶液中に１０％Ｚｒ５ｉ（ＯＣ，Ｈ，、）４金属アル
コキシドを含有しさらに外掛け０．０３ 重量％の水分
を添加した溶液である。Here, zrSiO, alkoxide is a solution containing 10% Zr5i(OC,H,,)4 metal alkoxide in an isopropanol solution and further adding 0.03% by weight of water.
暴露試験前後の各試験片の室温三点曲げ強度の比（強度
低下率）の測定結果を第１図に示す。暴露試験後の各試
験片の酸化層の厚みを測定結果を第２図に示す。 これ
らの結果から、ＺｒＳｉＯ４アルコキシドを真空含浸し
たもの（実施例１）及び浸漬含浸したもの（実施例２）
は、ガラス系酸化防止剤のみを塗布したもの（従来例１
）に比べて強度はほとんど低下せず材料の強度が維持さ
れていた。本発明の実施例１，２の酸化層の厚みは小さ
く、それは０．５ｎｎ以下であった。また、第３〜５図
に実施例１，２、従来例１の暴露試験後の断面ミクロ写
真の写生図をそれぞれ示す。実施例１（第３図）、２（
第４図）についてはガラス層２はＡｌ２Ｏ２−Ｃ質耐火
物１に良く濡れており、はぼ均一なガラス層２が形成さ
れていた。以上の結果から、炭素含有耐火物に金属アル
コキシドを真空含浸あるいは浸漬含浸し、さらにその表
面にガラス系酸化防止剤を塗布することにより、炭素含
有耐火物の酸化進行を防止し耐火物の強度を維持できる
ことが判明した。一方、従来例１（第５図）については
、ガラス層２の形成がｗｌ察されたが濡れ性の悪さに起
因するガラス層２の縦亀裂あるいはピンホールから侵入
した酸素による脱炭層３が認められた。Figure 1 shows the measurement results of the ratio of three-point bending strength at room temperature (strength reduction rate) of each test piece before and after the exposure test. Figure 2 shows the results of measuring the thickness of the oxidized layer of each test piece after the exposure test. From these results, it was found that ZrSiO4 alkoxide was vacuum impregnated (Example 1) and immersion impregnated (Example 2).
is the one coated with only glass-based antioxidant (conventional example 1)
), the strength of the material was maintained with almost no decrease. The thickness of the oxide layer in Examples 1 and 2 of the present invention was small, and was 0.5 nn or less. Further, Figs. 3 to 5 show cross-sectional microphotographs of Examples 1 and 2 and Conventional Example 1 after the exposure test, respectively. Examples 1 (Figure 3), 2 (
In FIG. 4), the glass layer 2 was well wetted with the Al2O2-C refractory 1, and a fairly uniform glass layer 2 was formed. From the above results, we found that vacuum impregnation or immersion impregnation of a metal alkoxide into a carbon-containing refractory and further coating the surface with a glass-based antioxidant prevents the progress of oxidation of the carbon-containing refractory and increases the strength of the refractory. It turned out that it was possible to maintain it. On the other hand, regarding Conventional Example 1 (Fig. 5), the formation of the glass layer 2 was observed, but a decarburized layer 3 was observed due to vertical cracks in the glass layer 2 due to poor wettability or oxygen that entered through pinholes. It was done.
（発明の効果）
上記の結果から明らかなごとく、金属アルコキシドを炭
素含有耐火物に真空含浸あるいは浸漬含浸しさらにガラ
ス系酸化防止剤を塗布することにより、炭素含有耐火物
とガラス系酸化防止剤との濡れ性を良くし、均一なガラ
ス層を形成させ、予熱時の炭素含有耐火物の局部酸化を
防止できることが可能となった。(Effect of the invention) As is clear from the above results, by vacuum impregnating or immersion impregnating a carbon-containing refractory with a metal alkoxide and further applying a glass-based antioxidant, the carbon-containing refractory and the glass-based antioxidant can be separated. It has become possible to improve the wettability of the glass, form a uniform glass layer, and prevent local oxidation of the carbon-containing refractory during preheating.
図面は本発明および従来例の実施例の結果を示し、第１
図は実施例および従来例の暴露試験後の強度低下率、第
２図は実施例および従来例の暴露試験後の酸化層の厚み
、第３，４図は実施例の暴露試験後の断面ミクロ写真の
写生図である。第５図は従来例の暴露試験後の断面ミク
ロ写真の写生図である。
１・・・Ａｆｌ、Ｏ，−Ｃ質耐火物
２・・・ガラス層
３・・・脱炭層
第
図
第
図
第
図
１００μｍ
１゜
ＡｌｔｏＪ−ｃ★市ヰ火↑勿
ス。
〃゛ヲス
ク
峡大・り
第
図
１００μｍThe drawings show the results of the present invention and the conventional example, and the first
The figure shows the strength reduction rate after the exposure test of the example and the conventional example. Figure 2 shows the thickness of the oxide layer after the exposure test of the example and the conventional example. Figures 3 and 4 show the cross-sectional micrograph after the exposure test of the example. This is a sketch of a photograph. FIG. 5 is a sketch of a cross-sectional microphotograph of a conventional example after an exposure test. 1...Afl, O, -C refractory 2...Glass layer 3...Decarburized layer 100μm 1゜AltoJ-c★City fire↑Of course. 〃゛Wosuku Gorge Diagram 100μm
Claims (1)
００℃以下の温度で加水分解させ、さらにその表面にガ
ラス系酸化防止剤を塗布したことを特徴とする耐酸化性
処理を施こした炭素含有耐火物。Impregnating the surface of the carbon-containing refractory with metal alkoxide,
A carbon-containing refractory that has been subjected to oxidation-resistant treatment, characterized in that it is hydrolyzed at a temperature of 00°C or lower and further coated with a glass-based antioxidant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23912590A JPH04119980A (en) | 1990-09-11 | 1990-09-11 | Carbon-containing refractory applied with oxidation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23912590A JPH04119980A (en) | 1990-09-11 | 1990-09-11 | Carbon-containing refractory applied with oxidation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04119980A true JPH04119980A (en) | 1992-04-21 |
Family
ID=17040162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23912590A Pending JPH04119980A (en) | 1990-09-11 | 1990-09-11 | Carbon-containing refractory applied with oxidation resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04119980A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003031374A1 (en) * | 2001-10-04 | 2003-04-17 | Kitakyushu Foundation For The Advancement Of Industry, Science And Technology | Refractory for furnace and furnace and method for surface treating furnace wall |
| JP2013100966A (en) * | 2011-11-09 | 2013-05-23 | Tokyo Yogyo Co Ltd | Regenerative burner heat reservoir, and method for manufacturing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4926308A (en) * | 1972-07-05 | 1974-03-08 | ||
| JPS6483584A (en) * | 1987-09-24 | 1989-03-29 | Toshiba Ceramics Co | Production of oxidation-resistant nonoxide based ceramics |
-
1990
- 1990-09-11 JP JP23912590A patent/JPH04119980A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4926308A (en) * | 1972-07-05 | 1974-03-08 | ||
| JPS6483584A (en) * | 1987-09-24 | 1989-03-29 | Toshiba Ceramics Co | Production of oxidation-resistant nonoxide based ceramics |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003031374A1 (en) * | 2001-10-04 | 2003-04-17 | Kitakyushu Foundation For The Advancement Of Industry, Science And Technology | Refractory for furnace and furnace and method for surface treating furnace wall |
| JP2013100966A (en) * | 2011-11-09 | 2013-05-23 | Tokyo Yogyo Co Ltd | Regenerative burner heat reservoir, and method for manufacturing the same |
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