JP2018012619A - Antioxidant and construction method therefor - Google Patents

Antioxidant and construction method therefor Download PDF

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JP2018012619A
JP2018012619A JP2016142605A JP2016142605A JP2018012619A JP 2018012619 A JP2018012619 A JP 2018012619A JP 2016142605 A JP2016142605 A JP 2016142605A JP 2016142605 A JP2016142605 A JP 2016142605A JP 2018012619 A JP2018012619 A JP 2018012619A
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antioxidant
water
glass frit
frit powder
mass
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辰児 田中
Shinji Tanaka
辰児 田中
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Krosaki Harima Corp
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Priority to PCT/JP2017/025087 priority patent/WO2018016361A1/en
Priority to TW106123754A priority patent/TW201817854A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B28B11/06—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers with powdered or granular material, e.g. sanding of shaped articles
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance explosion resistance and adhesiveness in an antioxidant constructed on a surface of a refractory constructed molded body containing water and nonoxide.SOLUTION: There is provided an antioxidant constructed on a surface of a refractory constructed molded body containing water and nonoxide, containing a glass frit powder and a water soluble thickener, or the glass frit powder, the water soluble thickener and a dispersant with the content of the glass frit powder of 95 mass% or more, the content of the water soluble thickener of 0.5 mass% or more and the content other than the glass frit powder, the water soluble thickener and the dispersant of 4 mass% or less including 0 and disappearance temperature of the water soluble thickener of 350°C or less.SELECTED DRAWING: None

Description

本発明は、水及び非酸化物を含む耐火物施工成形体の表面に施工される酸化防止剤、及びその施工方法に関する。   The present invention relates to an antioxidant applied to the surface of a refractory-formed molded article containing water and a non-oxide, and a method for the same.

耐火物の技術分野において使用される酸化防止剤として特許文献１及び２に、ガラスフリット粉末を含有するものが開示されている。   Patent Documents 1 and 2 disclose antioxidants used in the technical field of refractories, which contain glass frit powder.

しかし、特許文献１及び２の酸化防止剤はいずれも、実質的に水を含まない耐火物（れんが）の表面に施工されるもので、この酸化防止剤を、水を含む耐火物施工成形体、典型的には脱枠した後の高炉樋用不定形耐火物施工成形体の表面に施工すると、その後の昇温乾燥工程において耐火物施工成形体中の水が蒸発して、その耐火物施工成形体に爆裂を生じる。また、特許文献１及び２のようなガラスフリット粉末を含有する従来の酸化防止剤では、耐火物施工成形体の表面に対する接着性が十分ではない。   However, both of the antioxidants of Patent Documents 1 and 2 are applied to the surface of a refractory (brick) that does not substantially contain water. Typically, when it is applied to the surface of an unshaped refractory construction molded body for blast furnace fire after being deframed, the water in the refractory construction molded body evaporates in the subsequent heating and drying process, and the refractory construction Explosion occurs in the compact. Moreover, in the conventional antioxidant containing glass frit powder like patent document 1 and 2, the adhesiveness with respect to the surface of a refractory construction molded object is not enough.

特開平７−２７７８５８号公報JP-A-7-277858 特開２００６−９２７４号公報JP 2006-9274 A

本発明が解決しようとする課題は、水及び非酸化物を含む耐火物施工成形体の表面に施工される酸化防止剤において、耐爆裂性及び接着性を向上することにある。   The problem to be solved by the present invention is to improve the explosion resistance and adhesiveness in an antioxidant applied to the surface of a refractory molded article containing water and a non-oxide.

本発明の一観点によれば、次の酸化防止剤が提供される。
「水及び非酸化物を含む耐火物施工成形体の表面に施工される酸化防止剤であって、
ガラスフリット粉末と水溶性の増粘剤、又はガラスフリット粉末と水溶性の増粘剤と分散剤を含み、
前記ガラスフリット粉末の含有量が９５質量％以上、前記水溶性の増粘剤の含有量が０．５質量％以上、前記ガラスフリット粉末、前記水溶性の増粘剤及び前記分散剤以外のものの含有量が４質量％以下（０を含む。）であり、
前記水溶性の増粘剤の分解消失温度が３５０℃以下である酸化防止剤。」 According to one aspect of the present invention, the following antioxidant is provided.
"An antioxidant that is applied to the surface of the refractory construction molded body containing water and non-oxide,
Glass frit powder and water-soluble thickener, or glass frit powder and water-soluble thickener and dispersant,
Content of the glass frit powder is 95% by mass or more, content of the water-soluble thickener is 0.5% by mass or more, other than the glass frit powder, the water-soluble thickener and the dispersant. The content is 4% by mass or less (including 0),
An antioxidant having a decomposition disappearance temperature of the water-soluble thickener of 350 ° C. or lower. "

本発明の他の観点によれば、本発明の酸化防止剤を、脱枠した後の高炉樋用不定形耐火物施工成形体の表面に施工する酸化防止剤の施工方法が提供される。   According to the other viewpoint of this invention, the construction method of the antioxidant which constructs the antioxidant of this invention on the surface of the unshaped refractory construction molded object for blast furnace irons after removing a frame is provided.

高炉樋用不定形耐火物施工成形体等の水及び非酸化物を含む耐火物施工成形体は、一般的に３５０℃以上に昇温して乾燥するところ、本発明の酸化防止剤は、分解消失温度が３５０℃以下である水溶性の増粘剤を含有するので、３５０℃以上での本格的な乾燥前に増粘剤が消失し、これが耐火物施工成形体に含まれる水（蒸気）の逃げ道となり、耐爆裂性を確保することができる。   Refractory construction molded products containing water and non-oxides such as irregular shaped refractory construction molded products for blast furnaces are generally heated to 350 ° C or higher and dried. The antioxidant of the present invention is decomposed. Since it contains a water-soluble thickener whose vanishing temperature is 350 ° C. or lower, the thickener disappears before full-scale drying at 350 ° C. or higher, and this is water (steam) contained in the refractory construction molded body It is possible to secure explosion resistance.

なお、特許文献１及び２の酸化防止剤は、シリカ粉末、粘土といった、本発明で使用するガラスフリット粉末、水溶性の増粘剤及び分散剤以外のもの（以下「余計なもの」という。）を多く含有するため融点が上がってしまい、酸化防止剤が収縮して剥がれやすくなる。これに対して、本発明の酸化防止剤は、ガラスフリット粉末と水溶性の増粘剤、又はガラスフリット粉末と水溶性の増粘剤と分散剤を主体とし、「余計なもの」は４質量％以下（０を含む。）であり、しかもガラスフリット粉末が９５質量％以上と酸化防止剤の大部分を占めるため、水溶性の増粘剤により前述のとおり耐爆裂性を確保することができる。   The antioxidants of Patent Documents 1 and 2 are those other than the glass frit powder, water-soluble thickener and dispersant used in the present invention, such as silica powder and clay (hereinafter referred to as “extra”). As a result, the melting point rises, and the antioxidant shrinks easily. On the other hand, the antioxidant of the present invention mainly comprises glass frit powder and a water-soluble thickener, or glass frit powder and a water-soluble thickener and a dispersant. % Or less (including 0), and the glass frit powder accounts for the majority of the antioxidant with 95% by mass or more, so that the explosion resistance can be ensured by the water-soluble thickener as described above. .

また、本発明の酸化防止剤は、ガラスフリット粉末を９５質量％以上と多く含有するので、ガラスフリット粉末が溶けて耐火物施工成形体の表面の凹凸にかみ込むことで接着性が向上するとともに、ガラスフリット粉末による酸化防止効果を十分に発揮する。これに対して特許文献１及び２の酸化防止剤は、ガラスフリット粉末は９５質量％未満であり、前述のとおり「余計なもの」を多く含有するため、ガラスフリット粉末が溶けて耐火物施工成形体の表面の凹凸にかみ込むという作用効果は得られない。すなわち本発明の酸化防止剤は、「余計なもの」を４質量％以下（０を含む。）に抑え、しかもガラスフリット粉末を９５質量％以上と多く含有するからこそ、ガラスフリット粉末が耐火物施工成形体の表面に万遍なく行きわたり、その表面の凹凸にかみ込むのである。さらに、特許文献１及び２の酸化防止剤は前述のとおり、「余計なもの」を多く含むため融点が上がってしまい、酸化防止剤が収縮して剥がれやすくなるが、本発明の酸化防止剤は「余計なもの」を４質量％以下（０を含む。）に抑え、ガラスフリット粉末を多量に含むので、収縮して剥がれる問題を解消することもできる。   Moreover, since the antioxidant of the present invention contains a large amount of glass frit powder of 95% by mass or more, the glass frit powder melts and bites into the irregularities on the surface of the refractory construction molded body, thereby improving the adhesiveness. The anti-oxidation effect of the glass frit powder is fully exhibited. On the other hand, in the antioxidants of Patent Documents 1 and 2, the glass frit powder is less than 95% by mass and contains a lot of “excess” as described above, so that the glass frit powder melts and forms a refractory. The effect of biting into irregularities on the surface of the body cannot be obtained. That is, the antioxidant of the present invention suppresses “excessive” to 4% by mass or less (including 0) and contains a large amount of glass frit powder of 95% by mass or more. It travels evenly on the surface of the molded object and bites into the irregularities on the surface. Furthermore, as described above, the antioxidants of Patent Documents 1 and 2 contain a lot of “excessive”, so the melting point rises and the antioxidant shrinks easily, but the antioxidant of the present invention is Since “excess” is suppressed to 4% by mass or less (including 0) and the glass frit powder is contained in a large amount, the problem of shrinkage and peeling can be solved.

本発明において「余計なもの」は含有量が少ないことが好ましく、０質量％すなわち含まないことが最も好ましい。なお、「余計なもの」としては、特許文献１、２で使用されている粘土、シリカ粉末、炭化硼素などが挙げられる。   In the present invention, the “excess” is preferably low in content, and most preferably 0% by mass, ie, not included. Examples of “extra” include clay, silica powder, boron carbide and the like used in Patent Documents 1 and 2.

以上のとおり本発明によれば、酸化防止剤の耐爆裂性及び接着性が向上し、高炉樋用不定形耐火物施工成形体等の水及び非酸化物を含む耐火物施工成形体の表面に良好に施工することができ、この不定形耐火物施工成形体中の非酸化物が乾燥時に酸化するのを防止することができる。   As described above, according to the present invention, the explosion resistance and adhesion of the antioxidant are improved, and the surface of the refractory construction molded body containing water and non-oxide, such as an amorphous refractory construction molded body for blast furnace firewood. It can be applied satisfactorily and the non-oxides in the irregular refractory molded article can be prevented from oxidizing during drying.

本発明の酸化防止剤は、水及び非酸化物を含む耐火物施工成形体の表面に施工される。すなわち、施工対象の耐火物施工成形体が水を含むから爆裂が問題となり、非酸化物を含むから酸化が問題となる。耐火物施工成形体中の水の含有量は、一般的には３質量％以上３０質量％以下である。非酸化物としては、炭素、炭化珪素、金属シリコン、金属アルミ、アルマグ合金などが挙げられる。   The antioxidant of the present invention is applied to the surface of a refractory application molded body containing water and a non-oxide. That is, explosion is a problem because the refractory-formed molded object to be constructed contains water, and oxidation is a problem because it contains non-oxides. The content of water in the refractory construction molded body is generally 3% by mass or more and 30% by mass or less. Examples of the non-oxide include carbon, silicon carbide, metal silicon, metal aluminum, and almag alloy.

本発明の酸化防止剤は、ガラスフリット粉末と水溶性の増粘剤、又はガラスフリット粉末と水溶性の増粘剤と分散剤を含み、これら以外の「余計なもの」は４質量％以下（０を含む。）である。そして、ガラスフリット粉末の含有量は９５質量％以上、水溶性の増粘剤の含有量は０．５質量％以上とする。ガラスフリット粉末の含有量が９５質量％未満では、十分な接着性向上効果が得られず、酸化防止効果も不十分となる。また、水溶性の増粘剤の含有量が０．５質量％未満では、十分な耐爆裂性を確保できず、また付着性も確保できない。   The antioxidant of the present invention contains glass frit powder and a water-soluble thickener, or glass frit powder, a water-soluble thickener and a dispersant, and other “extra” is 4% by mass or less ( 0 is included.) The content of the glass frit powder is 95% by mass or more, and the content of the water-soluble thickener is 0.5% by mass or more. When the content of the glass frit powder is less than 95% by mass, a sufficient adhesion improving effect cannot be obtained, and the antioxidant effect is insufficient. In addition, when the content of the water-soluble thickener is less than 0.5% by mass, sufficient explosion resistance cannot be ensured and adhesion cannot be ensured.

前述のとおり、水及び非酸化物を含む耐火物施工成形体は、一般的に３５０℃以上に昇温して乾燥することから、本発明では乾燥時の耐爆裂性を確保するために水溶性の増粘剤として、分解消失温度が３５０℃以下のものを使用する。これにより、３５０℃以上での本格的な乾燥前に増粘剤が消失し、これが耐火物施工成形体に含まれる水（蒸気）の逃げ道となり、耐爆裂性を確保することができる。分解消失温度が３５０℃以下の水溶性の増粘剤としては、カルボキシルメチルセルロース（ＣＭＣ）、メチルセルロース（ＭＣ）、グルコース、マルトース（麦芽糖）、スクロース、ラクトース（乳糖）、セロビオースなどが挙げられ、これらから選択される１種又は２種以上の組合せを使用することができる。   As described above, since the refractory-formed molded body containing water and non-oxide is generally heated to 350 ° C. or higher and dried, the present invention is water-soluble in order to ensure explosion resistance during drying. As the thickener, one having a decomposition disappearance temperature of 350 ° C. or lower is used. As a result, the thickener disappears before full-scale drying at 350 ° C. or higher, and this serves as an escape route for water (steam) contained in the refractory construction molded body, thereby ensuring explosion resistance. Examples of the water-soluble thickener having a decomposition disappearance temperature of 350 ° C. or lower include carboxymethylcellulose (CMC), methylcellulose (MC), glucose, maltose (malt sugar), sucrose, lactose (lactose), cellobiose, and the like. One or a combination of two or more selected can be used.

ガラスフリット粉末としては、Ｎａ２Ｏ、Ｂ２Ｏ３、Ｐ２Ｏ５、Ｋ２Ｏ、Ａｌ２Ｏ３、ＣａＯ、Ｐｂ２Ｏ３、ＳｉＯ２などの成分を含む、例えば硼珪酸ガラス、リン酸ガラス又は珪酸ガラスを使用することができる。本発明で使用するガラスフリット粉末の軟化点は、水溶性の増粘剤の分解消失温度が３５０℃以下であることとの関係から３５０℃以上であることが好ましい。すなわち、水溶性の増粘剤が確実に分解消失した後にガラスフリット粉末が軟化することで、水溶性の増粘剤により耐爆裂性を確実に確保できるとともに、接着性もより向上する。さらに、ガラスフリット粉末による酸化防止効果を早期に発揮させる点も考慮すると、ガラスフリット粉末の軟化点は３５０℃以上９５０℃以下であることが好ましく、３５０℃以上６００℃以下がより好ましい。なお、ガラスフリット粉末の粒度は適宜調整すればよく、例えば粒度１ｍｍ以下に調整する。 Examples of the glass frit powder include components such as Na 2 O, B 2 O 3 , P 2 O 5 , K 2 O, Al 2 O 3 , CaO, Pb 2 O 3 , SiO 2 , for example, borosilicate glass, phosphorus Acid glass or silicate glass can be used. The softening point of the glass frit powder used in the present invention is preferably 350 ° C. or higher in view of the fact that the decomposition disappearance temperature of the water-soluble thickener is 350 ° C. or lower. That is, the glass frit powder is softened after the water-soluble thickener is surely decomposed and disappeared, so that the explosion-proof property can be reliably ensured by the water-soluble thickener and the adhesiveness is further improved. Further, considering that the antioxidant effect of the glass frit powder is exhibited at an early stage, the softening point of the glass frit powder is preferably 350 ° C. or higher and 950 ° C. or lower, and more preferably 350 ° C. or higher and 600 ° C. or lower. In addition, what is necessary is just to adjust the particle size of glass frit powder suitably, for example, it adjusts to 1 mm or less of particle size.

本発明において分散剤は使用しなくてもよいが、酸化防止剤全体の分散性を向上し施工性を向上する点から使用することが好ましい。また、分散剤を使用すると、酸化防止剤の施工時に使用する施工水の量を低減でき、結果として付着性向上に寄与し、かつ爆裂防止や接着性向上にも寄与するので、この点からも使用することが好ましい。分散剤としては、トリポリリン酸ソーダ、ヘキサメタリン酸ソーダ、ウルトラポリリン酸ソーダ、酸性ヘキサメタリン酸ソーダ、ホウ酸ソーダ、炭酸ソーダ、ポリメタリン酸などの無機塩、クエン酸ソーダ、酒石酸ソーダ、ポリアクリル酸、ポリアクリル酸ソーダ、スルホン酸ソーダ、ポリカルボン酸塩、β−ナフタレンスルホン酸塩類、メラニンスルホン酸塩類、ナフタレンスルフォン酸などが挙げられる。分散剤の使用量は、４．５質量％未満が好ましい。   In the present invention, a dispersant may not be used, but it is preferably used from the viewpoint of improving dispersibility of the whole antioxidant and improving workability. In addition, if a dispersant is used, the amount of construction water used during the construction of the antioxidant can be reduced. As a result, it contributes to improved adhesion, and also contributes to explosion prevention and improved adhesion. It is preferable to use it. Dispersants include inorganic salts such as sodium tripolyphosphate, sodium hexametaphosphate, sodium ultrapolyphosphate, sodium acid hexametaphosphate, sodium borate, sodium carbonate, polymetaphosphoric acid, sodium citrate, sodium tartrate, polyacrylic acid, polyacrylic Examples include acid soda, sodium sulfonate, polycarboxylate, β-naphthalene sulfonate, melanin sulfonate, and naphthalene sulfonic acid. The amount of the dispersant used is preferably less than 4.5% by mass.

本発明の酸化防止剤は、適量の施工水を添加し混練したうえで、水及び非酸化物を含む耐火物施工成形体、典型的には脱枠後の高炉樋用不定形耐火物の表面に施工する。これにより、耐火物施工成形体中の非酸化物が乾燥時に酸化するのを防止することができる。また、本発明の酸化防止剤は、リシンガン、ジュラクガン又はタイルガンを用いて吹付施工することが好ましい。リシンガン、ジュラクガン及びタイルガンは、高粘性物の吹付施工に適しているからである。リシンガン、ジュラクガン、タイルガンを用いた吹付施工法自体は周知であり、それぞれ例えば、特開２０１１−２３１５８９号公報、特開２００６−９２７４号公報、特開２００９−２４８０６８号公報に記載されている。   The antioxidant of the present invention, after adding an appropriate amount of construction water and kneading, is a refractory construction molded body containing water and non-oxides, typically the surface of an unshaped refractory for blast furnace fire after deframement Install to. Thereby, it can prevent that the non-oxide in a refractory construction molded object oxidizes at the time of drying. Moreover, it is preferable that the antioxidant of the present invention is sprayed using a lysing gun, a duragan or a tile gun. This is because the lysing gun, the durack gun, and the tile gun are suitable for spraying a highly viscous material. Spraying methods using lysing guns, duragans, and tile guns are well known, and are described in, for example, Japanese Patent Application Laid-Open Nos. 2011-231589, 2006-9274, and 2009-248068.

表１に示す各例の酸化防止剤に施工水を８０質量％添加して混練後、その混練物をリシンガンを用いて、試験用耐火物施工成形体（φ１００×１００）の表面に吹付施工して供試体を得た。ここで試験用耐火物施工成形体は、脱枠した後の高炉樋用不定形耐火物施工成形体を模擬したもので、Ａｌ２Ｏ３−ＳｉＣ−Ｃ系の不定形耐火物（ＳｉＣ：１９質量％、Ｔｏｔａｌ Ｃ：３．９質量％、低セメントタイプ）の脱枠養生品（未乾燥品）で水を６質量％含有するものである。そして、得られた供試体について、耐爆裂性、接着性、付着性及び耐酸化性を以下の要領で評価した。 After adding 80% by mass of construction water to the antioxidants shown in Table 1 and kneading, the kneaded product was sprayed onto the surface of a test refractory construction molded body (φ100 × 100) using a ricin gun. A specimen was obtained. Here, the test refractory-formed molded body simulates the refractory shaped refractory-formed molded body for blast furnace fire after being deframed, and is an Al 2 O 3 —SiC—C-based amorphous refractory (SiC: 19). The unframed curing product (undried product) of 6% by mass of water (mass%, Total C: 3.9 mass%, low cement type). And about the obtained specimen, the explosion resistance, adhesiveness, adhesiveness, and oxidation resistance were evaluated in the following ways.

（１）耐爆裂性
供試体を５００〜８００℃の雰囲気内に投げ込み、その供試体の爆裂の有無で評価した。表１では爆裂なしを○、爆裂ありを×で表記した。 (1) Explosion resistance The specimen was thrown into an atmosphere of 500 to 800 ° C., and the specimen was evaluated for the presence or absence of explosion. In Table 1, “No explosion” is indicated by “◯”, and “Explosion” is indicated by “X”.

（２）接着性
供試体を昇温乾燥（１０００℃×５ｈ）した後、プラスチックハンマーで叩いて酸化防止剤が剥落したか否かで評価した。表１では剥離なしを○、わずかに剥離ありを△、顕著に剥離ありを×で表記した。 (2) Adhesiveness After the sample was dried at elevated temperature (1000 ° C. × 5 h), it was evaluated by whether the antioxidant was peeled off by hitting with a plastic hammer. In Table 1, “No peeling” is indicated by “◯”, slight peeling is indicated by “△”, and marked peeling is indicated by “X”.

（３）付着性
酸化防止剤の施工時における酸化防止剤のタレの有無で評価した。表１ではタレなしを○、わずかにタレありを△、顕著にタレありを×で表記した。 (3) Adhesiveness It evaluated by the presence or absence of the sagging of antioxidant at the time of construction of antioxidant. In Table 1, “O” indicates no sagging, “Δ” indicates slight sagging, and “x” indicates salient sagging.

（４）耐酸化性
供試体を昇温乾燥（１０００℃×５ｈ）した後、供試体をカットして、カットした断面の酸化（白色化）の有無で評価した、表１では白色でなく酸化していない場合を耐酸化性ありとして○、白色で酸化している場合を耐酸化性なしとして×で表記した。 (4) Oxidation resistance After the specimen was dried at elevated temperature (1000 ° C. × 5 h), the specimen was cut and evaluated by the presence or absence of oxidation (whitening) of the cut section. The case where it was not oxidized was indicated as “O” as having oxidation resistance, and the case where it was oxidized in white was indicated as “X” as not having oxidation resistance.

Figure 2018012619
Figure 2018012619

表１に示すように、分散剤を含有し、「余計なもの」を含有しない本発明の実施例１〜３は、耐爆裂性、接着性、付着性及び耐酸化性のいずれも良好な結果が得られた。分散剤を含有しない本発明の実施例４では付着性、「余計なもの」として粘土を４質量％含有する実施例５では接着性がやや劣化したものの実用上問題ないレベルであった。   As shown in Table 1, Examples 1 to 3 of the present invention containing a dispersant and not containing "extra" are good results in all of explosion resistance, adhesion, adhesion and oxidation resistance. was gotten. In Example 4 of the present invention which did not contain a dispersant, adhesion was "extra", and in Example 5 which contained 4% by mass of clay, the adhesiveness was slightly degraded, but it was at a level that was not a problem in practice.

一方、比較例１は、「余計なもの」として粘土を７質量％含有し、ガラスフリット粉末の含有量が少ない例で、接着性及び耐酸化性が悪かった。また、比較例２は水溶性の増粘剤の含有量が少ない例で、付着性が悪く、その後の評価に耐える供試体が得られなかった。したがって、比較例２については、耐爆裂性、接着性及び耐酸化性の評価はできなかった。   On the other hand, Comparative Example 1 contained 7% by mass of clay as “excessive” and had a low content of glass frit powder, and had poor adhesion and oxidation resistance. Further, Comparative Example 2 is an example in which the content of the water-soluble thickener is small, and the adhesion was poor, and a specimen that could withstand subsequent evaluation was not obtained. Therefore, Comparative Example 2 could not be evaluated for explosion resistance, adhesion and oxidation resistance.

Claims (4)

水及び非酸化物を含む耐火物施工成形体の表面に施工される酸化防止剤であって、
ガラスフリット粉末と水溶性の増粘剤、又はガラスフリット粉末と水溶性の増粘剤と分散剤を含み、
前記ガラスフリット粉末の含有量が９５質量％以上、前記水溶性の増粘剤の含有量が０．５質量％以上、前記ガラスフリット粉末、前記水溶性の増粘剤及び前記分散剤以外のものの含有量が４質量％以下（０を含む。）であり、
前記水溶性の増粘剤の分解消失温度が３５０℃以下である酸化防止剤。 It is an antioxidant applied to the surface of a refractory construction molded body containing water and non-oxide,
Glass frit powder and water-soluble thickener, or glass frit powder and water-soluble thickener and dispersant,
Content of the glass frit powder is 95% by mass or more, content of the water-soluble thickener is 0.5% by mass or more, other than the glass frit powder, the water-soluble thickener and the dispersant. The content is 4% by mass or less (including 0),
An antioxidant having a decomposition disappearance temperature of the water-soluble thickener of 350 ° C. or lower. 前記ガラスフリット粉末の軟化点が３５０℃以上９５０℃以下である請求項１に記載の酸化防止剤。   The antioxidant of Claim 1 whose softening point of the said glass frit powder is 350 degreeC or more and 950 degrees C or less. 請求項１又は２に記載の酸化防止剤を、脱枠した後の高炉樋用不定形耐火物施工成形体の表面に施工する酸化防止剤の施工方法。   The construction method of the antioxidant which constructs the antioxidant of Claim 1 or 2 on the surface of the unshaped refractory construction molded object for blast furnace irons after removing the frame. リシンガン、ジュラクガン又はタイルガンを用いて、前記酸化防止剤を吹付施工する請求項３に記載の酸化防止剤の施工方法。   The construction method of antioxidant of Claim 3 which sprays and constructs the said antioxidant using a lisin gun, a duragan, or a tile gun.
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