JPH05148042A - Monolithic refractory for casting - Google Patents
Monolithic refractory for castingInfo
- Publication number
- JPH05148042A JPH05148042A JP3335452A JP33545291A JPH05148042A JP H05148042 A JPH05148042 A JP H05148042A JP 3335452 A JP3335452 A JP 3335452A JP 33545291 A JP33545291 A JP 33545291A JP H05148042 A JPH05148042 A JP H05148042A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- zirconium oxide
- corrosion resistance
- refractory
- casting
- 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.)
- Withdrawn
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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、取鍋、真空脱ガス装
置、タンディッシュなどに使用される耐火物として好適
な流し込み用不定形耐火物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a castable refractory material suitable as a refractory material used for ladle, vacuum degassing device, tundish and the like.
【０００２】[0002]
【従来の技術】従来の流し込み施工用不定形耐火物（以
下、流し込み材）の材質は、シャモット質、高アルミナ
質、マグネシア質、アルミナ−マグネシア質などが一般
的である。最近では、例えば特開昭６４−８７５７７号
公報、特開平３−２３２７５号公報に見られるように、
アルミナ−スピネル質も提案されている。アルミナ−ス
ピネル質は、アルミナがもつ耐食性および容積安定性と
スピネルの耐スラグ浸透性の相乗効果によって、優れた
耐用性を示す。2. Description of the Related Art Conventional castable refractory for casting (hereinafter referred to as casting material) is generally made of chamotte, high alumina, magnesia, alumina-magnesia. Recently, as seen, for example, in Japanese Patent Laid-Open Nos. 64-87577 and 3-23275,
Alumina-spinel materials have also been proposed. Alumina-spinel material exhibits excellent durability due to the synergistic effect of the corrosion resistance and volume stability of alumina and the slag penetration resistance of spinel.
【０００３】[0003]
【発明が解決しようとする課題】近年、高級鋼種が精錬
されるようになり、これに伴って溶鋼の処理温度の上
昇、容器内での滞留時間の延長などの使用条件の過酷化
から、従来材質の流し込み材では十分に対応できなくな
ってきている。アルミナ−スピネル質も含め、従来の流
し込み材に使用される結合剤は、アルミナセメントが主
流である。アルミナセメントは施工体の強度付与に優れ
る反面、その成分中のＣａＯが骨材成分あるいはスラグ
と反応し、低融物を生成して耐食性、耐スラグ浸透性の
低下、過焼結による構造的スポーリングなどを招く。本
発明は上記材質の欠点を解決した流し込み材を提供する
ことを目的とする。In recent years, high-grade steel grades have been refined, and along with this, due to the severer operating conditions such as an increase in the processing temperature of molten steel and an extension of the residence time in the container, It is becoming difficult to use the pouring material. Alumina cement is the predominant binder used in conventional casting materials, including alumina-spinel materials. Alumina cement is excellent in imparting strength to the construction work, but CaO in the component reacts with the aggregate component or slag to form a low melt, which results in corrosion resistance, deterioration of slag penetration resistance, and structural sintering due to oversintering. Invite polls. It is an object of the present invention to provide a casting material that solves the above-mentioned drawbacks of the materials.
【０００４】[0004]
【課題を解決するための手段】本発明は、アルミナおよ
び／またはＭｇＯ・Ａｌ2Ｏ3系スピネルを主材とした配
合組成物に、平均粒径が１５０μｍ以下の酸化ジルコニ
ウムを外掛け０．３〜５重量％およびマグネシア結合剤
を外掛け１〜１０重量％添加したことを特徴とする流し
込み用不定形耐火物である。According to the present invention, zirconium oxide having an average particle size of 150 μm or less is externally applied to a compounded composition containing alumina and / or MgO.Al 2 O 3 type spinel as a main material. It is an amorphous refractory for pouring, characterized in that .about.5% by weight and 1 to 10% by weight of a magnesia binder are added to the outside.
【０００５】アルミナ−スピネル質の流し込み材におい
てマグネシア結合剤を使用することは前記した特開平３
−２３２７５号公報で既に公知である。マグネシア結合
剤は耐食性低下の原因となるＣａＯを殆ど含んでいない
ために、アルミナセメントを使用した材質に比べて耐食
性に優れている。しかし、近年の使用条件の過酷化は、
それでもなお十分なものではなく、さらに耐食性に優れ
た材質が強く望まれている。The use of a magnesia binder in an alumina-spinel cast material is described in the above-mentioned JP-A-3.
It is already known from Japanese Patent No. 23275. Since the magnesia binder contains almost no CaO, which causes a decrease in corrosion resistance, it is superior in corrosion resistance to a material using alumina cement. However, the severer usage conditions in recent years are
Still, it is not enough, and a material having excellent corrosion resistance is strongly desired.
【０００６】そこで本発明者らは検討を重ねた結果、マ
グネシア結合剤と共に、酸化ジルコニウムを特定の粒度
と割合で配合すると耐食性向上に顕著な効果が得られる
ことを知り、本願発明を完成するに至ったものである。
本発明で使用する酸化ジルコニウム（ＺｒＯ2）は、天
然、人工のいずれでもよい。不純物が少なく、しかもＹ
2Ｏ3、ＭｇＯ、ＣａＯなどを添加して安定化させたタイ
プのものが好ましい。ＺｒＯ2純度は例えば８０重量％
以上、好ましくは９０重量％以上のものを使用する。平
均粒径は１００μｍ以下とする。As a result of extensive studies, the present inventors have found that the addition of zirconium oxide together with a magnesia binder in a specific particle size and ratio has a remarkable effect on the improvement of corrosion resistance. It has come.
The zirconium oxide (ZrO 2 ) used in the present invention may be natural or artificial. Fewer impurities, yet Y
A type in which 2 O 3 , MgO, CaO or the like is added and stabilized is preferable. ZrO 2 purity is, for example, 80% by weight
Above, preferably 90% by weight or more is used. The average particle size is 100 μm or less.
【０００７】図１は、アルミナ質流し込み材において、
平均粒径１４μｍの酸化ジルコニウムの添加割合と耐食
性の関係をグラフ化したものである。グラフ中、Ａはア
ルミナセメントを外掛け５重量％添加したアルミナ質流
し込み材、Ｂはマグネシア結合剤を外掛け３．５重量％
添加したアルミナ質流し込み材である。FIG. 1 shows an alumina cast material,
2 is a graph showing the relationship between the addition ratio of zirconium oxide having an average particle size of 14 μm and corrosion resistance. In the graph, A is an alumina-based casting material to which 5% by weight of alumina cement is added, and B is 3.5% by weight of a magnesia binder.
It is the added alumina-based casting material.
【０００８】図１のとおり、Ａのアルミナセメントを結
合剤とした材質は酸化ジルコニウムの添加で耐食性の向
上は認められるが、顕著なものではない。これに対し、
Ｂのマグネシア結合剤を使用した材質は、酸化ジルコニ
ウムの添加で耐食性が著しく向上することが確認され
る。酸化ジルコニウムの割合は、０．３重量％未満では
耐食性が従来材質と大差がない。５重量％を超えると耐
食性では問題ないが、過焼結となって耐スポ−リング性
が低下する。さらに好ましい割合は、０．５〜３重量％
である。As shown in FIG. 1, the material having the alumina cement of A as the binder shows improved corrosion resistance by the addition of zirconium oxide, but this is not remarkable. In contrast,
It is confirmed that the material using the B magnesia binder has a significantly improved corrosion resistance when zirconium oxide is added. If the proportion of zirconium oxide is less than 0.3% by weight, the corrosion resistance is not so different from that of conventional materials. If it exceeds 5% by weight, there is no problem in corrosion resistance, but oversintering causes deterioration of sponging resistance. A more desirable ratio is 0.5 to 3% by weight.
Is.
【０００９】本発明の流し込み材は、マグネシア結合剤
と酸化ジルコニウムの併用添加によって初めて耐食性お
よび熱間強度に優れた結果が得られる。これは、酸化ジ
ルコニウムは骨材のアルミナとは固溶しないのに対し、
マグネシア結合剤とは反応性が高く、焼結し、耐火物組
織を緻密化するためと考えられる。The casting material of the present invention can be excellent in corrosion resistance and hot strength only when the magnesia binder and zirconium oxide are added in combination. This is because zirconium oxide does not form a solid solution with aggregate alumina.
It is considered that it is highly reactive with the magnesia binder and sinters to densify the refractory structure.
【００１０】図２は、アルミナ骨材に酸化ジルコニウム
を外掛け３重量％およびマグネシア結合剤を外掛け５重
量％添加した流し込み材において、耐食性と酸化ジルコ
ニウムの平均粒径との関係をグラフ化したものである。
酸化ジルコニウムは平均粒径が大きいとマグネシア結合
剤との反応性に劣るためか、平均粒径が１５０μｍを超
えると流し込み材の耐食性が不十分である。平均粒径の
下限は特に限定されるものではないが、極微粉は製造コ
ストが高いので、経済面からして平均粒径が１μｍ未満
の使用は好ましくない。FIG. 2 is a graph showing the relationship between the corrosion resistance and the average particle size of zirconium oxide in a cast material obtained by adding 3% by weight of zirconium oxide to an alumina aggregate and 5% by weight of a magnesia binder. It is a thing.
If the average particle size of zirconium oxide exceeds 150 μm, the corrosion resistance of the casting material is insufficient, because the reactivity of the zirconium oxide with the magnesia binder is poor when the average particle size is large. Although the lower limit of the average particle size is not particularly limited, it is not preferable to use the ultrafine powder having an average particle size of less than 1 μm from the economical point of view because the production cost is high.
【００１１】骨材としてのアルミナは、焼結品、電融品
のいずれでもよい。その一部に仮焼アルミナを使用して
もよい。純度はＡｌ2Ｏ3含有量９７重量％以上のものが
好ましい。骨材は、前記のアルミナの他、ＭｇＯ・Ａｌ
2Ｏ3系スピネル（以下、単にスピネルと称する）使用し
てもよい。スピネルは耐食性、耐スラグ浸透性に優れ効
果をもつ。スピネルは骨材として使用した場合、アルミ
ナと同様、酸化ジルコニウムとほとんど固溶しない。Alumina as the aggregate may be either a sintered product or an electromelted product. Calcination alumina may be used for a part thereof. The purity of Al 2 O 3 is preferably 97% by weight or more. Aggregates are MgO / Al in addition to the above-mentioned alumina
2 O 3 -based spinel (hereinafter, simply referred to as spinel) may be used. Spinel has excellent effects on corrosion resistance and slag penetration resistance. When used as an aggregate, spinel, like alumina, hardly forms a solid solution with zirconium oxide.
【００１２】スピネルについても焼結品、電融品、仮焼
品のいずれを使用してもよい。スピネルを構成するＭｇ
Ｏ・Ａｌ2Ｏ3の各成分の比は、必ずしも理論組成のもの
でなくてもよい。例えばモル比でＭｇＯ・Ａｌ2Ｏ3が
０.４〜１.１：１.１〜０.４の範囲であればよい。骨材
粒度は従来の流し込み材と特に変わりなく、施工時の流
動性および充填性などを考慮して、粗粒・中粒・微粒に
調整される。骨材のアルミナおよび／またはスピネルに
対し、その一部をマグネシア、アルミナ−シリカ、ムラ
イト、ジルコン、炭素、炭化物、窒化物で置き換えるこ
ともできる。As the spinel, any of a sintered product, an electromelted product and a calcined product may be used. Mg that constitutes spinel
The ratio of each component of O.Al 2 O 3 does not necessarily have to be the theoretical composition. For example, the molar ratio of MgO.Al 2 O 3 may be 0.4 to 1.1: 1.1 to 0.4. The particle size of aggregate is not particularly different from that of conventional pouring materials, and is adjusted to coarse particles, medium particles, and fine particles in consideration of fluidity and filling property during construction. For the aggregate alumina and / or spinel, some of them may be replaced with magnesia, alumina-silica, mullite, zircon, carbon, carbide, nitride.
【００１３】マグネシア結合剤は従来材質と同様に、平
均粒径４０〜３００μｍの活性なものを使用する。その
割合は、外掛けで０．１重量％未満では施工体強度に劣
る。１０重量％を超えると高温下での異常膨張で施工体
組織をぜい弱化させる。施工時の流動性を付与する分散
剤の添加は従来材質と同様である。添加量は外掛け０．
０１〜５ｗｔ％が好ましい。具体的材質は、例えばヘキ
サメタりん酸ソーダ、トリポリりん酸ソーダ、ポリアク
リル酸ソーダなどである。また、流し込み材の添加物と
して従来公知のファイバー類、金属粉、発泡剤、シリカ
フラワ−、粘土などを適量添加してもよいことはもちろ
んである。As the magnesia binder, an active one having an average particle diameter of 40 to 300 μm is used as in the conventional material. If the ratio is less than 0.1% by weight on the outside, the strength of the construction body is poor. If it exceeds 10% by weight, the structure of the construction body is weakened due to abnormal expansion at high temperature. The addition of a dispersant that imparts fluidity during construction is the same as in conventional materials. The amount added is 0.
01-5 wt% is preferable. Specific materials are, for example, sodium hexametaphosphate, sodium tripolyphosphate, sodium polyacrylate and the like. It is needless to say that conventionally known fibers, metal powder, foaming agent, silica flour, clay, etc. may be added in appropriate amounts as additives for the casting material.
【００１４】マグネシア結合剤を添加する本発明の材質
に、さらにアルミナセメントを添加することは好ましく
ない。微量添加では問題ないが、アルミナセメントの併
用添加は、施工後の加熱乾燥時にマグネシア結合剤中の
結晶水とアルミナセメント中の結晶水の蒸発温度が異な
るためか、水蒸気圧によって施工体組織の一部が崩壊す
る。It is not preferable to further add alumina cement to the material of the present invention to which the magnesia binder is added. Although it is not a problem to add a small amount, the combined use of alumina cement does not depend on the water vapor pressure because of the difference in the evaporation temperature of the crystallization water in the magnesia binder and the crystallization water in the alumina cement during heating and drying after construction. The department collapses.
【００１５】施工は常法どおり、流し込み材全体に対す
るに外掛けで４〜１０ｗｔ％程度の水分を添加し、型枠
を用いて鋳込み成形される。鋳込みの際に充填性を向上
させるため、一般には型枠にバイブレーターを取付ける
か、あるいは流し込み材中に棒状バイブレーターを挿入
する。施工対象は、例えば取鍋・真空脱ガス装置・タン
ディッシュなどの内張り、真空脱ガス装置浸漬管・溶鋼
浸漬型ガス吹き込み用ランス・溶鋼浸漬型フリーボード
などの耐火物被覆などである。The construction is carried out in the usual manner by adding about 4 to 10 wt% of water to the entire casting material by external casting, and casting is performed using a mold. In order to improve the filling property at the time of casting, a vibrator is generally attached to the mold, or a rod-shaped vibrator is inserted in the casting material. The construction target is, for example, a lining of a ladle, a vacuum degassing device, a tundish, a vacuum degassing device dip tube, a molten steel dipping type gas injection lance, a refractory coating such as a molten steel dipping freeboard.
【００１６】[0016]
【実施例】以下に、本発明の実施例とその比較例を示
す。表１は、各例で使用したマグネシア微粉と酸化ジル
コニウムの化学分析値および平均粒径である。表２は、
各例の配合組成と試験結果である。各例はいずれも施工
性に見合った適量の水分を添加し、型枠内に振動鋳込み
成形した。成形後は４８時間養生させ、さらに２００℃
×１６時間加熱乾燥したものを試験片とした。EXAMPLES Examples of the present invention and comparative examples are shown below. Table 1 shows the chemical analysis values and the average particle size of the magnesia fine powder and zirconium oxide used in each example. Table 2 shows
It is a compounding composition and a test result of each example. In each case, an appropriate amount of water suitable for workability was added, and vibration casting was performed in the mold. After molding, cure for 48 hours and then 200 ℃
The test piece was heat dried for 16 hours.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２Ａ】 [Table 2A]
【００１９】[0019]
【表２Ｂ】 [Table 2B]
【００２０】試験方法は以下のとおり 曲げ強度；ＪＩＳ−Ｒ２５５３に準じる。 気孔率；ＪＩＳ−Ｒ２２０５に準じる。 耐スポーリング性；５５×５５×２３０ｍｍの試験片
を、加熱（１４００℃）←→空冷をくり返し、そのキレ
ツ発生状況から耐スポーリング性について大、中、小の
三段階に評価した。 回転侵食；鋼片：転炉スラグ＝６０：４０（重量比）を
溶剤とし、１７００℃×３ｈｒ回転侵食し、溶損寸法と
スラグ浸透寸法を測定した。 実機試験；真空脱ガス装置の内張りに使用し、耐用チャ
ージ数を求めた。空欄の箇所は試験しなかったものであ
る。The test method is as follows: Flexural strength; conforms to JIS-R2553. Porosity: According to JIS-R2205. Resistance to spalling: A test piece of 55 × 55 × 230 mm was repeatedly heated (1400 ° C.) ← → air cooling, and the spalling resistance was evaluated in three grades from large, medium, and small from the state of crevice generation. Rotational erosion: Steel slab: converter slag = 60:40 (weight ratio) was used as a solvent, and rotational erosion was performed at 1700 ° C for 3 hours, and a melt loss dimension and a slag infiltration dimension were measured. Actual machine test: Used for lining a vacuum degassing device, and determined the number of durable charges. The blank areas are not tested.
【００２１】表２の結果から、本発明の実施例はいずれ
も耐食性に優れた結果を示し、施工強度にも問題がな
い。比較例１はマグネシア結合剤を使用しているが、本
発明のように酸化ジルコニウムを併用していないために
耐食性に劣る。比較例２はアルミナセメントを結合剤と
した従来最も一般的な材質であり、本発明実施例に比べ
て耐食性に劣る。From the results shown in Table 2, all the examples of the present invention have excellent corrosion resistance, and there is no problem in working strength. Comparative Example 1 uses a magnesia binder, but has poor corrosion resistance because it does not use zirconium oxide as in the present invention. Comparative Example 2 is the most general conventional material using alumina cement as a binder, and is inferior in corrosion resistance to the inventive examples.
【００２２】マグネシア結合剤、酸化ジルコニウムのそ
れぞれの添加量が多すぎる比較例５、比較例３はいずれ
も耐食性、耐スラグ浸透性に劣る。平均粒径の大きい酸
化ジルコニウムを使用した比較例４は、マグネシア結合
剤との反応性に劣るためか耐食性の効果がない。比較例
９は酸化ジルコニウムを添加しているが、結合剤がアル
ミナセメントであり、耐食性向上の効果が不十分であ
る。酸化ジルコニウム、マグネシア結合剤とアルミナセ
メントを併用した比較例７は、施工体強度および耐食性
に劣る。また、実機試験でも本発明実施例の材質は比較
例に比べていずれも好結果が得られている。Comparative Examples 5 and 3 in which the amounts of the magnesia binder and zirconium oxide added are too large are inferior in corrosion resistance and slag penetration resistance. Comparative Example 4, which uses zirconium oxide having a large average particle size, does not have the effect of corrosion resistance, probably because the reactivity with the magnesia binder is poor. In Comparative Example 9, zirconium oxide is added, but the binder is alumina cement and the effect of improving corrosion resistance is insufficient. Comparative Example 7 in which zirconium oxide, a magnesia binder, and alumina cement were used in combination was inferior in strength and corrosion resistance of the construction body. Also, in the actual machine test, good results were obtained for the materials of the examples of the present invention as compared with the comparative examples.
【００２３】[0023]
【発明の効果】本発明は以上の実施例の結果からも明ら
かなように、アルミナ質、スピネル質またはアルミナ−
スピネル質の流し込み材において、耐食性が格段に向上
し、しかも耐スポーリング性などについて従来材質と比
べて遜色がない。その結果、実機試験では従来材質に相
当する比較例１および比較例２に比べ １.４倍以上の耐
用性を示す。近年の炉操業は苛酷化の一途をたどり、し
かも耐火物原単位の低減を強く求められる中で、耐食性
に優れた本発明の流し込み材質の工業的価値はきわめて
高い。As is clear from the results of the above examples, the present invention is based on alumina, spinel or alumina.
Corrosion resistance of spinel cast material is remarkably improved, and spalling resistance is comparable to conventional materials. As a result, in the actual machine test, the durability is 1.4 times or more that of Comparative Examples 1 and 2 corresponding to the conventional material. In recent years, furnace operations have become more and more severe, and while it is strongly demanded to reduce the basic unit of refractory, the casting material of the present invention having excellent corrosion resistance has an extremely high industrial value.
【図１】アルミナ質流し込み材において、酸化ジルコニ
ウムの添加割合と耐食性の関係をグラフ化したものであ
る。FIG. 1 is a graph showing the relationship between the addition ratio of zirconium oxide and corrosion resistance in an alumina casting material.
【図２】耐食性と酸化ジルコニウムの平均粒径との関係
をグラフ化したものである。FIG. 2 is a graph showing the relationship between corrosion resistance and the average particle size of zirconium oxide.
フロントページの続き (72)発明者 細川 清弘 兵庫県高砂市荒井町新浜１−３−１ ハリ マセラミツク株式会社内 (72)発明者 西脇 均 兵庫県高砂市荒井町新浜１−３−１ ハリ マセラミツク株式会社内 (72)発明者 西 浩一 兵庫県高砂市荒井町新浜１−３−１ ハリ マセラミツク株式会社内Front Page Continuation (72) Inventor Kiyohiro Hosokawa 1-3-1 Niihama, Arai-cho, Takasago, Hyogo Prefecture Harima Maseramic Co., Ltd. (72) Inventor Hitoshi Nishiwaki 1-3-1 Niihama, Arai-cho, Takasago, Hyogo Harima Maseramic Co., Ltd. (72) Inventor Koichi Nishi 1-3-1 Niihama, Arai-cho, Takasago-shi, Hyogo Harima Maseramic Co., Ltd.
Claims (1)
Ｏ3系スピネルを主材とした配合組成物に、平均粒径が
１５０μｍ以下の酸化ジルコニウムを外掛け０．３〜５
重量％およびマグネシア結合剤を外掛け１〜１０重量％
添加したことを特徴とする流し込み用不定形耐火物。1. Alumina and / or MgO.Al 2
Zirconium oxide having an average particle size of 150 μm or less is externally coated on a compounded composition containing O 3 -based spinel as a main component to 0.3 to 5
Wt% and magnesia binder applied 1-10 wt%
A castable amorphous refractory characterized by being added.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3335452A JPH05148042A (en) | 1991-11-26 | 1991-11-26 | Monolithic refractory for casting |
| US07/977,247 US5283215A (en) | 1991-11-26 | 1992-11-16 | Refractories for casting process |
| GB9224925A GB2262522B (en) | 1991-11-26 | 1992-11-26 | Refractories for use in casting processes |
| KR1019920022484A KR930009958A (en) | 1991-11-26 | 1992-11-26 | Injection Molding Refractories |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3335452A JPH05148042A (en) | 1991-11-26 | 1991-11-26 | Monolithic refractory for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05148042A true JPH05148042A (en) | 1993-06-15 |
Family
ID=18288718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3335452A Withdrawn JPH05148042A (en) | 1991-11-26 | 1991-11-26 | Monolithic refractory for casting |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH05148042A (en) |
| KR (1) | KR930009958A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309410A (en) * | 2017-06-07 | 2017-11-03 | 唐山钢铁集团有限责任公司 | The continuous cast method of steel for resisting sulfuric acid dew point corrosion |
| CN113173780A (en) * | 2021-04-26 | 2021-07-27 | 郑州大学 | Magnesia-bonded refractory castable containing in-situ spinel and preparation method thereof |
| CN117362008A (en) * | 2023-10-13 | 2024-01-09 | 郑州金河源耐火材料有限公司 | Periclase-spinel and hollow sphere composite brick and preparation method thereof |
-
1991
- 1991-11-26 JP JP3335452A patent/JPH05148042A/en not_active Withdrawn
-
1992
- 1992-11-26 KR KR1019920022484A patent/KR930009958A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309410A (en) * | 2017-06-07 | 2017-11-03 | 唐山钢铁集团有限责任公司 | The continuous cast method of steel for resisting sulfuric acid dew point corrosion |
| CN113173780A (en) * | 2021-04-26 | 2021-07-27 | 郑州大学 | Magnesia-bonded refractory castable containing in-situ spinel and preparation method thereof |
| CN117362008A (en) * | 2023-10-13 | 2024-01-09 | 郑州金河源耐火材料有限公司 | Periclase-spinel and hollow sphere composite brick and preparation method thereof |
| CN117362008B (en) * | 2023-10-13 | 2024-04-26 | 郑州金河源耐火材料有限公司 | Periclase-spinel and hollow sphere composite brick and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR930009958A (en) | 1993-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990204 |