JPH09255439A - Carbon-containing basic castable refractory - Google Patents
Carbon-containing basic castable refractoryInfo
- Publication number
- JPH09255439A JPH09255439A JP8093221A JP9322196A JPH09255439A JP H09255439 A JPH09255439 A JP H09255439A JP 8093221 A JP8093221 A JP 8093221A JP 9322196 A JP9322196 A JP 9322196A JP H09255439 A JPH09255439 A JP H09255439A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- magnesia
- refractory
- alumina
- containing basic
- 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
Classifications
-
- 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
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
- C04B35/6309—Aluminium phosphates
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
- C04B2111/00887—Ferrous metallurgy
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本願発明は、溶鋼取鍋や真空脱ガ
ス炉など溶融金属の内張り材および溶鋼精錬用ランスチ
ューブ等に利用するキャスタブル耐火物に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a castable refractory used for a molten metal lining material such as a molten steel ladle and a vacuum degassing furnace, and a lance tube for refining molten steel.
【０００２】[0002]
【従来の技術】取鍋や真空脱ガス炉およびランスなどに
アルミナ・スピネル質およびアルミナ・マグネシア質の
流し込み耐火物が使用されている。ところが高級鋼種が
精錬されるようになり、溶鋼温度の上昇，耐湯時間の延
長，スラグ塩基度のアップ等で操業条件が苛酷になって
きている。従来材質のものでは耐食性および耐スポーリ
ング性をはじめ熱間特性が劣るため、十分な耐用性が得
られていない。2. Description of the Related Art Casting refractories of alumina / spinel and alumina / magnesia are used in ladle, vacuum degassing furnace and lance. However, as high grade steels have been refined, the operating conditions have become severe due to such factors as rising temperature of molten steel, extension of hot water resistance and increase of slag basicity. The conventional material is inferior in hot resistance such as corrosion resistance and spalling resistance, so that sufficient durability cannot be obtained.
【０００３】そこでアルミナ・スピネル質およびアルミ
ナ・マグネシア質の流し込み耐火物において、さらに材
質の改良がおこなわれている。特開平４−５０１７８号
公報では、アルミナ・スピネルよりなる骨材にカーボン
とアルミナセメントを配合した材質，特開平５−２７０
９２９号公報ではアルミナ，スピネル，マグネシアより
選ばれる一種以上にカーボンと軽焼マグネシアを結合剤
とする材質が提案されている。Therefore, further improvements have been made to the materials of cast refractories of alumina spinel and alumina magnesia. Japanese Patent Application Laid-Open No. 4-50178 discloses a material obtained by mixing carbon and alumina cement into an aggregate made of alumina spinel, and Japanese Patent Application Laid-Open No. 5-270.
Japanese Patent No. 929 proposes a material containing carbon and light burned magnesia as a binder in one or more selected from alumina, spinel, and magnesia.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら前記の特
開平４−５０１７８号公報および特開平５−２７０９２
９号公報の材質はカーボンの含有と結合剤にアルミナセ
メントや軽焼マグネシアなどの組み合わせにより、耐ス
ポーリング性，耐Ｆｅ成分浸潤性，耐スラグ浸潤性，カ
ーボン酸化による耐食性防止などに効果があるとしてい
るが、熱間における結合剤の強度劣化をともなうことか
ら、思ったほどの酸化防止および耐食性の向上が認めら
れない。なぜなら、アルミナセメントおよび軽焼マグネ
シアを結合剤とすることで５００〜１０００℃における
水和物の熱分解により、著しく熱間の強度が低下し、組
織劣化をともなう亀裂の発生によりカーボン酸化の促進
と構造スポーリングによる剥離がおこりやすい。そこで
本願発明は、上記欠点を改善し熱間の強度が大きく、組
織劣化のおこらない材質を提供することで、さらに耐食
性を向上するものである。However, the above-mentioned JP-A-4-50178 and JP-A-5-27092.
The material of No. 9 is effective for spalling resistance, Fe component infiltration resistance, slag infiltration resistance, corrosion resistance due to carbon oxidation, etc. by combining carbon cement and a binder such as alumina cement or light burned magnesia. However, since the strength of the binder is deteriorated while hot, the antioxidant and corrosion resistance cannot be improved as much as expected. This is because when alumina cement and light burned magnesia are used as the binder, the thermal decomposition of the hydrate at 500 to 1000 ° C. significantly lowers the hot strength and promotes carbon oxidation due to the occurrence of cracks accompanied by tissue deterioration. Peeling easily occurs due to structural spalling. Therefore, the present invention improves the above-mentioned drawbacks, provides a material having a high hot strength and no deterioration of the structure, and further improves the corrosion resistance.
【０００５】[0005]
【問題を解決するための手段および作用】発明者らは従
来材質の上記問題点を解決するためにカーボン含有塩基
性キャスタブルの結合剤に従来技術にはない第一リン酸
アルミニウムを用いることが効果的であることを見いだ
し、本願発明を完成するに至ったものである。すなわち
本願発明の特長とするところは、マグネシア，スピネ
ル，アルミナより選ばれる一種以上を主材にカーボン１
〜３０重量部からなる耐火骨材１００重量部に対し、結
合剤として第一リン酸アルミニウムをＰ2Ｏ5換算で０．
０５〜６重量部を配合してなるカーボン含有塩基性キャ
スタブルである。Means and Actions for Solving the Problems In order to solve the above problems of conventional materials, the present inventors have found that it is effective to use monoaluminum phosphate, which is not available in the prior art, as a binder for carbon-containing basic castables. The present invention has been completed and the present invention has been completed. That is, the feature of the present invention is that carbon 1 is composed mainly of one or more selected from magnesia, spinel, and alumina.
To refractory aggregate 100 parts consisting of 30 parts by weight, the aluminum primary phosphate in terms of P 2 O 5 as a binder 0.
It is a carbon-containing basic castable compounded with 05 to 6 parts by weight.
【０００６】本願発明における結合剤は、第一リン酸ア
ルミニウムであり、The binder in the present invention is monoaluminum phosphate,
【表１】 に示す酸性リン酸塩やアルカノールアミンで錯体化した
リン酸塩（多木化学製：アコラーム）などが、最も有効
であることを確認し、この結合剤の添加量を適正に規制
することにより、カーボンの共存下でもセラミックボン
ドを形成し易く、発現強度が大きく、いずれの高温下に
おいても高強度を示し、耐火物の組織劣化をおこさず、
カーボンの酸化防止にも優れた効果を示す。第一リン酸
アルミニウムの使用比率はＰ2Ｏ5換算として０．０５〜
６重量部に規制されるが、これは０．０５重量部より少
ない範囲では強度発現に乏しく、また６重量部より多い
範囲では、ボンドの発現効果に差がなく、他方高温でマ
グネシアとの反応による融液生成量が多くなり、耐食性
が低下することから好ましくない。第一リン酸アルミニ
ウムの硬化剤としては、アルカリ土類金属を経時的に徐
々に溶出する物質が好ましく、マグネシア微粉やアルミ
ナセメントなどがあげられるが耐食性を考慮すると、マ
グネシア微粉が好ましい。マグネシア微粉は０．５mm以
下、特に０．０７４mm以下が０．５重量部以上あること
が望ましく、活性マグネシアや電融マグネシアのいずれ
でもよい。[Table 1] By confirming that the acidic phosphate shown in (1) and phosphate complexed with alkanolamine (manufactured by Taki Chemical Co., Ltd .: Acolarm) are the most effective, and properly controlling the addition amount of this binder, It is easy to form a ceramic bond even in the presence of carbon, has a high manifestation strength, shows high strength at any high temperature, does not cause structural deterioration of refractory,
It also has an excellent effect in preventing carbon oxidation. Using the ratio of aluminum primary phosphate is 0.05 as terms of P 2 O 5
It is regulated to 6 parts by weight, but if it is less than 0.05 parts by weight, the strength development is poor, and if it is more than 6 parts by weight, there is no difference in the bond development effect, while it reacts with magnesia at high temperatures. This is not preferable because the amount of melt produced by the increase in the amount increases the corrosion resistance. As the curing agent for monoaluminum phosphate, a substance that gradually elutes alkaline earth metal with time is preferable, and magnesia fine powder, alumina cement and the like can be mentioned, but magnesia fine powder is preferable in view of corrosion resistance. The fine powder of magnesia is preferably 0.5 mm or less, and more preferably 0.074 mm or less in an amount of 0.5 part by weight or more, and may be either active magnesia or fused magnesia.
【図１】はマグネシアを主体とする耐火原料にカーボン
８重量部を加え、結合剤に第一リン酸アルミニウム，ア
ルミナセメント，軽焼マグネシアをそれぞれに添加した
流し込み耐火物について養生後から１０００℃までの温
度範囲における曲げ強さの関係を示したグラフである。
本図から第一リン酸アルミニウムを使用した耐火物はい
ずれの温度においても高強度を示すことが認められる。[Fig. 1] shows a cast refractories obtained by adding 8 parts by weight of carbon to a magnesia-based refractory raw material and adding monoaluminum phosphate, alumina cement, and light-burning magnesia as binders to 1000 ° C after curing. 5 is a graph showing the relationship of bending strength in the temperature range of FIG.
From this figure, it is recognized that the refractory material using monobasic aluminum phosphate exhibits high strength at any temperature.
【０００７】次に本願発明のカーボン含有塩基性キャス
タブル耐火物に使用する耐火骨材およびその他添加物に
ついて説明する。まずマグネシア原料は、第一リン酸ア
ルミニウムの硬化剤に使用するマグネシア微粉以外は、
特に限定されるものではなく、海水マグネシア，電融マ
グネシア，焼成マグネサイト等のいずれでもよいが、耐
食性の面からＭｇＯ純度９７重量部以上が好ましい。ス
ピネル原料も不純物の少ないものがよく、焼結スピネ
ル，電融スピネルのいずれでもよく、その組成はＭｇＯ
・Ａｌ2Ｏ3の理論組成に限定されるものではない。好ま
しくはアルミナ７０〜９５重量部，マグネシア５〜３０
重量部の範囲のものを使用する。アルミナ原料も耐食性
の面からＡｌ2Ｏ3純度９５重量部以上の電融アルミナま
たは焼結アルミナが好ましい。また上記の耐火骨材粒度
構成は施工体の密充填組織が得られるように粗粒，中
粒，微粒に調整する他、耐食性を考慮し、各粒度におけ
る使用骨材の種類の選定は任意に定めることができる。Next, the refractory aggregate and other additives used in the carbon-containing basic castable refractory of the present invention will be described. First of all, the magnesia raw materials, except for the magnesia fine powder used for the curing agent for monoaluminum phosphate,
It is not particularly limited, and any of seawater magnesia, electrofused magnesia, calcined magnesite, etc. may be used, but MgO purity of 97 parts by weight or more is preferable from the viewpoint of corrosion resistance. The spinel raw material preferably has few impurities, and may be either sintered spinel or electrofused spinel, and its composition is MgO.
-It is not limited to the theoretical composition of Al 2 O 3 . Preferably 70-95 parts by weight of alumina, 5-30 magnesia
Use those in the range of parts by weight. From the viewpoint of corrosion resistance, the alumina raw material is also preferably fused alumina or sintered alumina having an Al 2 O 3 purity of 95 parts by weight or more. In addition to adjusting the above-mentioned refractory aggregate grain size composition to coarse, medium, and fine grains so as to obtain a densely packed structure of the construction body, considering the corrosion resistance, the type of aggregate used for each grain size can be arbitrarily selected. Can be set.
【０００８】カーボン原料としては、黒鉛，ピッチ粉，
カーボンブラック若しくは黒鉛に類する炭素化合物等の
うちから選ばれる一種以上で１mm以下の微粉状のものが
好ましい。配合は１〜３０重量部で１重量部未満ではス
ラグの浸潤防止に効果が少なく、カーボンの特性が発揮
されない。また３０重量部より多いと流動性が失われ耐
火物の組織が緻密でなく、カーボン酸化が大きく耐食性
が低下する。Carbon raw materials include graphite, pitch powder,
It is preferable that one or more kinds selected from carbon black, carbon compounds similar to graphite, etc., and fine particles of 1 mm or less. If the amount is 1 to 30 parts by weight and less than 1 part by weight, the effect of preventing slag infiltration is small and the carbon characteristics are not exhibited. If it is more than 30 parts by weight, the fluidity is lost, the structure of the refractory is not dense, carbon oxidation is large, and the corrosion resistance is lowered.
【０００９】その他の添加物としては、本発明の効果を
阻害しない範囲のもので有効に作用するものであれば、
使用可能である。例えば耐火物組織の補強や耐酸化性お
よび施工性をより向上させる目的として有機質，無機質
および金属質などの各種ファイバー，それに金属粉やＢ
4Ｃ，ＳｉＣなどの炭素化合物を利用した酸化防止剤，
施工性や組織の緻密性のために粘土，シリカ，解こう
剤，分散剤等を添加混合することもできる。Other additives may be used as long as they do not impair the effects of the present invention and are effective.
Can be used. For example, for the purpose of reinforcing the refractory structure and further improving oxidation resistance and workability, various fibers such as organic, inorganic and metallic materials, as well as metal powder and B
Antioxidants using carbon compounds such as 4 C and SiC,
Clay, silica, a deflocculant, a dispersant, etc. may be added and mixed for the workability and the denseness of the structure.
【００１０】[0010]
【表１】に本願発明の代表的な実施例と比較例に使用し
た第一リン酸アルミニウムおよびアルミナセメント，軽
焼マグネシアの特性を示す。Table 1 shows the characteristics of the monoaluminum phosphate and the alumina cement and the light burned magnesia used in the representative examples and comparative examples of the present invention.
【００１１】[0011]
【表１】[Table 1]
【００１２】[0012]
【表２】 に本願発明の代表的な実施例および比較例の配合を示
す。[Table 2] The formulations of typical examples and comparative examples of the present invention are shown in FIG.
【００１３】[0013]
【表２】[Table 2]
【００１４】[0014]
【表２】に示した本願発明の代表的な実施例および比較
例の配合にいずれも５〜９重量部の混練水量を添加し型
枠内に振動鋳込成形をおこなった後、２０℃で２４時間
養生して硬化体試料を得た。この試料をもとに１１０℃
乾燥後および１４００℃還元焼成後の物性値と酸化試験
および耐食性比較試験の結果をAfter adding a kneading water amount of 5 to 9 parts by weight to each of the formulations of the representative examples and comparative examples of the present invention shown in Table 2 and performing vibrational casting in a mold, the mixture was mixed at 20 ° C. After curing for 24 hours, a cured product sample was obtained. 110 ℃ based on this sample
The physical property values after drying and after 1400 ° C reduction firing and the results of the oxidation test and the corrosion resistance comparison test are shown.
【表３】 に示す。[Table 3] Shown in
【００１５】[0015]
【表３】[Table 3]
【００１６】次にNext,
【表３】の試験方法を示す。Table 3 shows the test method.
【００１７】 かさ比重，気孔率：ＪＩＳ−Ｒ２２０５に準じる。Bulk specific gravity and porosity: According to JIS-R2205.
【００１８】 圧縮強さ ：ＪＩＳ−Ｒ２５５３に準じる。Compressive strength: According to JIS-R2553.
【００１９】耐食性評価 ：各種試料を高周波誘導
炉にセットし、行なった。Evaluation of Corrosion Resistance: Various samples were set in a high frequency induction furnace and then evaluated.
【００２０】（鉄：スラグ＝９：１の比率） スラグ組成は下記(Iron: slag = 9: 1 ratio) The slag composition is as follows:
【表４】 に示す。[Table 4] Shown in
【００２１】試験は１６３０〜１６７０℃で３０分ごと
にスラグを入れかえて、４時間保持後溶鋼とスラグを排
出し、冷却後溶損寸法を測定した。In the test, the slag was replaced every 30 minutes at 1630 to 1670 ° C., the molten steel and the slag were discharged after being held for 4 hours, and the melt loss dimension was measured after cooling.
【００２２】酸化試験 ：大気雰囲気中で１３０
０℃×３ｈｒ焼成後脱炭層の厚みを測定した。Oxidation test: 130 in air
After firing at 0 ° C. for 3 hours, the thickness of the decarburized layer was measured.
【００２３】[0023]
【表４】[Table 4]
【００２４】[0024]
【表３】に示すように比較例に対して実施例は、特に高
温部の圧縮強さが大きく、しかも耐食性および耐酸化性
にも優れている。As shown in Table 3, in comparison with the comparative example, the example has a large compressive strength particularly in a high temperature portion, and is also excellent in corrosion resistance and oxidation resistance.
【００２５】[0025]
【発明の効果】以上の結果、本願発明のカーボン含有塩
基性キャスタブル耐火物は熱間強度が高く、耐食性およ
び耐酸化性のいずれにおいても良好な効果を示し、従来
材質に比べてその耐用性は格段に優れている。よって、
溶鋼取鍋や真空脱ガス炉などの溶融金属容器の内張り材
および溶鋼精錬用ランスチューブ等，溶鋼やスラグに接
する箇所へ応用することにより寿命延長に大きく貢献す
ることができる。As a result of the above, the carbon-containing basic castable refractory material of the present invention has a high hot strength and exhibits good effects in both corrosion resistance and oxidation resistance, and its durability is superior to that of conventional materials. Remarkably excellent. Therefore,
It can be greatly contributed to the extension of life by applying it to lining materials of molten metal containers such as molten steel ladle and vacuum degassing furnace and lance tube for molten steel refining, where it contacts molten steel and slag.
【００２６】[0026]
【図１】 アルミナ骨材を主体にマグネシアおよびカー
ボン原料を添加してなる耐火原料に結合剤として第一リ
ン酸アルミニウム，アルミナセメント，軽焼マグネシア
をそれぞれに添加した流し込み耐火物において、養生か
ら１０００℃までの温度範囲における曲げ強さの関係を
示した。FIG. 1 is a flow chart of a cast refractory material in which primary aluminum phosphate, alumina cement, and light-burning magnesia are added as binders to a refractory raw material obtained by adding magnesia and a carbon raw material mainly to an alumina aggregate. The relationship of bending strength in the temperature range up to ℃ is shown.
Claims (1)
ア，スピネル，アルミナより選ばれる一種以上を主材
に、カーボン１〜３０重量部からなる耐火骨材１００重
量部に対し、結合剤として第一リン酸アルミニウムをＰ
2Ｏ5換算で０．０５〜６重量部を配合してなるカーボン
含有塩基性キャスタブル耐火物。1. In castable refractory, one part or more selected from magnesia, spinel, and alumina is used as a main material, and 100 parts by weight of a refractory aggregate consisting of 1 to 30 parts by weight of carbon is used as a binder, and aluminum phosphate monobasic is used as a binder. To P
A basic castable refractory material containing carbon containing 0.05 to 6 parts by weight in terms of 2 O 5 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093221A JPH09255439A (en) | 1996-03-21 | 1996-03-21 | Carbon-containing basic castable refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093221A JPH09255439A (en) | 1996-03-21 | 1996-03-21 | Carbon-containing basic castable refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09255439A true JPH09255439A (en) | 1997-09-30 |
Family
ID=14076515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8093221A Pending JPH09255439A (en) | 1996-03-21 | 1996-03-21 | Carbon-containing basic castable refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09255439A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020055726A (en) * | 2018-10-04 | 2020-04-09 | 黒崎播磨株式会社 | Spinel-magnesia-carbon brick for vacuum degassing apparatus, and vacuum degassing apparatus having the same lined on sidewall of lower vessel thereof |
-
1996
- 1996-03-21 JP JP8093221A patent/JPH09255439A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020055726A (en) * | 2018-10-04 | 2020-04-09 | 黒崎播磨株式会社 | Spinel-magnesia-carbon brick for vacuum degassing apparatus, and vacuum degassing apparatus having the same lined on sidewall of lower vessel thereof |
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