JPH0633179B2 - Irregular refractory for pouring - Google Patents
Irregular refractory for pouringInfo
- Publication number
- JPH0633179B2 JPH0633179B2 JP1155003A JP15500389A JPH0633179B2 JP H0633179 B2 JPH0633179 B2 JP H0633179B2 JP 1155003 A JP1155003 A JP 1155003A JP 15500389 A JP15500389 A JP 15500389A JP H0633179 B2 JPH0633179 B2 JP H0633179B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- magnesia
- clinker
- spinel
- amount
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、流し込み用不定形耐火物、とくに取鍋内張
り，ＤＨ，ＲＨ用浸漬管，タンディッシュ用母材等の流
し込み施工に好適な耐火物に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a refractory material suitable for pouring, such as casting an indefinite refractory material for pouring, particularly a ladle lining, a dipping pipe for DH and RH, a base material for a tundish, etc. Regarding things.
従来からかかる流し込み用不定形耐火物として、珪石
質，ロー石質，シャモット質，高アルミナ質，マグネシ
ア質，ロー石−ジルコン質等が使用されてきた。Hitherto, as such castable amorphous refractories, siliceous, loamy, chamotte, high alumina, magnesia, loach-zircon, etc. have been used.
近年、真空脱ガス法，連続鋳造，取鍋精錬技術の向上か
ら、高級鋼種が精錬されるようになり、溶鋼温度の上
昇、さらに滞湯時間の延長等により、処理条件はますま
す苛酷になってきており、従来の雑質のものでは耐食
性，耐スポーリング性及び容積安定性等の点で対応でき
なくなってきている。In recent years, with the improvement of vacuum degassing method, continuous casting, and ladle refining technology, high-grade steel has been refined, and the processing conditions have become more severe due to the rise of molten steel temperature and the extension of the stay time. As a result, it is becoming difficult to use conventional coarse materials in terms of corrosion resistance, spalling resistance, volume stability and the like.
このため、このような苛酷な処理条件に適用可能な耐火
物として、材質面からスピネルクリンカーを使用したス
ピネル質不定形耐火物が、特開昭６０−６０９８５号公
報，特開昭６４−８７５７７号公報等に開示されてい
る。Therefore, as a refractory that can be applied to such severe processing conditions, a spinel-shaped amorphous refractory using a spinel clinker in terms of material is disclosed in JP-A-60-60985 and JP-A-64-87577. It is disclosed in the gazette and the like.
このスピネル質不定形耐火物はスピネルクリンカーの特
性、たとえば熱膨張係数が小さいことや、スラグ浸潤抵
抗性の大きいこと等を有効に利用して、耐食性，耐スポ
ーリング性及び容積安定性等に優れ、実炉使用時の亀
裂，剥離損耗を大幅に軽減することができる。This spinel amorphous refractory is excellent in corrosion resistance, spalling resistance, volume stability, etc. by effectively utilizing the characteristics of spinel clinker, such as small thermal expansion coefficient and large slag infiltration resistance. In addition, it is possible to greatly reduce cracking and peeling wear when using an actual furnace.
とくに特開昭６０−６０９８５号公報に記載のものは、
耐火材に付与すべき膨張性を、従来の塩基性材料に見ら
れるように、ＭｇＯ−Ａｌ２Ｏ３の反応により生じるス
ピネル膨張によるものではなく、微粉部分を構成する１
０〜３５重量％含有されるアルミナと３〜１０重量％含
有されるアルミナセメント中のＣａＯとの高温での反応
によるＣａＯ・６Ａｌ２Ｏ３の形成に伴う膨張を利用し
て耐火物としての膨張性を付与したことにある。Particularly, those disclosed in JP-A-60-60985 are
The expansivity to be imparted to the refractory material is not due to spinel expansion caused by the reaction of MgO-Al 2 O 3 as seen in the conventional basic material, but constitutes the fine powder portion.
Expansion as a refractory by utilizing the expansion accompanying the formation of CaO · 6Al 2 O 3 due to the reaction of 0-35 wt% alumina and 3-10 wt% CaO in alumina cement at high temperature It is to give the sex.
しかしながら、操業条件が苛酷な場合にはその溶損量は
極端に大きくなるという欠点がある。However, there is a drawback that the amount of erosion becomes extremely large under severe operating conditions.
また、特開昭６４−８７５７７号公報に記載のものは、
容積安定性を得るためにマグネシアを添加したものであ
るが、スラグの浸潤が大きく、耐スポーリング性に劣る
ことから剥離，地金差しが大きいという欠点があった。Further, those described in JP-A-64-87577 are
Magnesia was added to obtain volumetric stability, but it had the drawbacks of large slag infiltration and poor spalling resistance, resulting in large peeling and ingot insertion.
このように、上記各公報に記載の内張り耐火物は、従前
の不定形材料に比較して、耐食性，耐スポーリング性及
び容積安定性等の改善により高耐用性を得ることを可能
としたが、スラグ浸潤に伴う構造的なスポーリングを発
生しやすい欠点があり、稼働中期、末期に剥離損耗を生
じ、安定性の点から改善を望まれている。As described above, the lining refractory described in each of the above publications can achieve high durability by improving corrosion resistance, spalling resistance, volume stability, etc., as compared with conventional amorphous materials. However, there is a drawback that structural spalling is likely to occur due to slag infiltration, peeling wear occurs in the middle and end of operation, and improvement is desired from the viewpoint of stability.
本発明において解決すべき課題は、かかる従来の耐火材
料の欠点を解消することにあって、マグネシアクリンカ
ーとスピネルクリンカーを併用することによる耐食性向
上の効果を、耐スラグ浸潤性，耐スポーリング性を劣化
させることなく改善することにある。The problem to be solved in the present invention is to eliminate the drawbacks of the conventional refractory materials, and to improve the corrosion resistance by using a magnesia clinker and a spinel clinker together, to improve slag infiltration resistance and spalling resistance. It is to improve without deteriorating.
本発明の流し込み用不定形耐火物は、高純度アルミナ原
料が少なくとも５７重量％と、スピネルクリンカーが１
０〜３０重量％と、粒径０．２１ｍｍ未満のマグネシア
クリンカーが１〜１０重量％と、非晶質シリカが０．２
〜３重量％とからなる混合物に、硬化剤として活性マグ
ネシア外掛け０．２〜５重量％を配合したものである。The castable refractory material according to the present invention comprises at least 57% by weight of a high-purity alumina raw material and 1 of spinel clinker.
0 to 30% by weight, 1 to 10% by weight of magnesia clinker having a particle size of less than 0.21 mm, and 0.2% of amorphous silica.
.About.3% by weight and a mixture of 0.2 to 5% by weight of activated magnesia as a curing agent.
また、上記発明において、高純度アルミナ原料の中の１
〜２０重量％を粒径０．２１ｍｍ以上のマグネシアクリ
ンカーと置き換えることも可能である。In the above invention, one of the high-purity alumina raw materials
It is also possible to replace ˜20% by weight with a magnesia clinker having a particle size of 0.21 mm or more.
本発明に使用する高純度アルミナ原料としては、具体的
にな焼結アルミナ，電融アルミナもしくは仮焼アルミナ
をさし、スピネルクリンカーとしては、焼結スピネル，
電融スピネル，マグネシアクリンカーとしては、焼結マ
グネシア，電融マグネシア等の不純物の少ないものが使
用できる。Specific examples of the high-purity alumina raw material used in the present invention include sintered alumina, fused alumina or calcined alumina, and as spinel clinker, sintered spinel,
As the electrofused spinel and magnesia clinker, those having few impurities such as sintered magnesia and electrofused magnesia can be used.
本発明の配合組成において、アルミナ−スピネル−マグ
ネシアの使用比率は、材料の耐食性，耐スラグ浸潤性，
容積安定性から決定される。In the compounding composition of the present invention, the use ratio of alumina-spinel-magnesia depends on the corrosion resistance of the material, slag infiltration resistance,
Determined from volume stability.
本発明において配合されるマグネシアは、アルミナとス
ピネル化反応による膨張性付与及び酸化鉄含有スラグに
対する耐食性向上，スラグ浸潤抑制機能を有する。しか
しながら、１重量％より少ない範囲では材料の膨張性を
付与するのに充分ではなく、また１０重量％より多い範
囲では膨張が過度となり、使用中の組織劣化をもたら
す。The magnesia compounded in the present invention has the functions of imparting expandability by alumina and spinelization reaction, improving corrosion resistance to iron oxide-containing slag, and suppressing slag infiltration. However, a range of less than 1% by weight is not sufficient to impart the expandability of the material, and a range of more than 10% by weight causes excessive expansion, resulting in tissue deterioration during use.
１〜１０重量％配合されるマグネシアクリンカーの粒度
に関しては、耐食性，均一なスピネル化反応を起こさせ
るためには０．２１ｍｍ未満である必要がある。The particle size of the magnesia clinker blended in an amount of 1 to 10% by weight must be less than 0.21 mm in order to cause corrosion resistance and a uniform spinelization reaction.
スピネル原料の使用比率は、配合され非晶質シリカの量
による耐食性によって規制される。スピネルの使用量が
３０重量％を越える範囲では、逆にＭｇＯ−Ａｌ２Ｏ３
−ＳｉＯ２系低融物生成量増大に起因する耐食性劣化の
傾向を示す。このことからスピネルの配合量は１０〜３
０重量％に規制されるが、粒度に関してはとくに規制は
ない。The usage ratio of the spinel raw material is regulated by the corrosion resistance depending on the amount of the amorphous silica compounded. In the range where the amount of spinel used exceeds 30% by weight, conversely, MgO—Al 2 O 3
Shows a tendency of corrosion resistance deterioration due to an increase in the amount of -SiO 2 low melt formation. Therefore, the amount of spinel compounded is 10-3.
It is regulated to 0% by weight, but there is no particular regulation regarding the particle size.
また、非晶質シリカの添加は、硬化促進及び養生から乾
燥初期の強度発現を付与し、さらに材料の通気率を低レ
ベルに維持し、かつスラグの浸透の抑制効果を期待する
ことができる。Further, the addition of amorphous silica can be expected to have an effect of promoting hardening and imparting strength development from curing to early stages of drying, maintaining the air permeability of the material at a low level, and suppressing the penetration of slag.
非晶質シリカ０．２重量％より少ない範囲では強度発現
に乏しく、また３重量％より多い範囲ではＭｇＯ−Ａｌ
２Ｏ３−ＳｉＯ２系低融物生成による過焼結傾向が増大
し耐スポーリング生に劣り好ましくない。また、非晶質
シリカの粒度としては、比表面積２０〜５００ｍ２／ｇ
のものが好ましい。Amorphous silica is poor in strength development in a range of less than 0.2% by weight, and MgO-Al in a range of more than 3% by weight.
It is not preferable because the tendency of oversintering due to the formation of a 2 O 3 —SiO 2 -based low melt is increased and the spalling resistance is poor. In addition, the particle size of the amorphous silica has a specific surface area of 20 to 500 m 2 / g.
Are preferred.
本発明の高純度アルミナ原料は、上記のマグネシア，ス
ピネル，非晶質シリカの使用比率を規制することによっ
て決定され、少なくとも５７重量％の配合量となる。The high-purity alumina raw material of the present invention is determined by controlling the use ratio of the above magnesia, spinel, and amorphous silica, and has a compounding amount of at least 57% by weight.
さらに、本発明に用いる高純度アルミナ原料の一部を粒
径が０．２１ｍｍ以上のマグネシアクリンカーに置き換
えることによって耐食生の向上を計ることができる。し
かしながら、マグネシアクリンカーを２０重量％を越え
る範囲で使用すると膨張が大きくなり過ぎ、また耐スポ
ーリング生も劣化する欠点がある。そのため、その量は
１〜２０重量％の範囲に規定される。Further, the corrosion resistance can be improved by replacing a part of the high-purity alumina raw material used in the present invention with a magnesia clinker having a particle size of 0.21 mm or more. However, when the magnesia clinker is used in a range exceeding 20% by weight, there is a drawback that the expansion becomes too large and the spalling resistance is deteriorated. Therefore, the amount is specified in the range of 1 to 20% by weight.
本発明において配合される硬化剤は、活性マグネシアで
ある。従来のキャスタブル耐火物の硬化剤としてはアル
ミナセメントが一般的であったが、セメント中のＣａＯ
はＣａＯ−Ａｌ２Ｏ３−ＭｇＯ−ＳｉＯ２系低融物を生
成することから耐食性の劣化をもたらし、また過焼結に
よる耐スポーリング性の低下を生じることから好ましく
ない。本発明による活性マグネシアとは水酸化マグネシ
ウムを初めとするマグネシウム化合物を１５００℃以下
の温度で焼成して得られるもので、比表面積１０〜２０
０ｍ２／ｇの範囲が好適である。活性マグネシアは水共
存下で徐々に溶解し、非晶質シリカと反応することによ
ってキャスタブル耐火物に硬化性を付与することができ
る。アルミナセメントに比較して低融物の生成量が少な
く、キャスタブル耐火物の耐食性，耐スポーリング性を
向上させる効果が大きい。しかし、この添加量が０．２
重量％よりも少ない範囲では、施工後脱枠するまでの硬
化時間が長く、かつ強度発言に乏しく、また５重量％を
越える範囲ではＡｌ２Ｏ３−ＭｇＯのスピネル生成反応
による膨張性大により組織の劣化を誘発することから、
量的に制限されるものである。The curing agent compounded in the present invention is activated magnesia. Alumina cement was generally used as a hardener for conventional castable refractories.
Is unfavorable because it produces CaO—Al 2 O 3 —MgO—SiO 2 -based low-melting material, which leads to deterioration of corrosion resistance and deterioration of spalling resistance due to oversintering. The active magnesia according to the present invention is obtained by firing a magnesium compound such as magnesium hydroxide at a temperature of 1500 ° C. or lower, and has a specific surface area of 10 to 20.
A range of 0 m 2 / g is suitable. Activated magnesia gradually dissolves in the presence of water and reacts with the amorphous silica, so that the castable refractory can be hardened. Compared to alumina cement, it produces less low-melting material and has a great effect on improving the corrosion resistance and spalling resistance of castable refractories. However, this addition amount is 0.2
If the amount is less than 5% by weight, the hardening time until deframing after construction is long and the strength is poor, and if the amount exceeds 5% by weight, the structure is large due to the expansiveness due to the spinel formation reaction of Al 2 O 3 —MgO. From inducing deterioration of
It is limited in quantity.
また、耐火物の作業性付与のために縮合燐酸アルカリ，
ポリカルボン酸ナトリウム等の分散剤や材料特性に影響
を与えない範囲の少量の粘土、更に短時間乾燥に対する
耐爆裂性改善のために少量の金属を添加することも差し
支えない。In addition, in order to add workability to refractories, condensed alkali phosphate,
It is also possible to add a dispersant such as sodium polycarboxylate, a small amount of clay within a range that does not affect the material properties, and a small amount of metal for improving explosion resistance to short-time drying.
第１表は本発明による耐火物混合物における高純度アル
ミナ原料とマグネシアクリンカー微粉との混合割合を変
えたとき、及び高純度アルミナ原料の一部を０．２１ｍ
ｍ以上のマグネシアクリンカーに置換したときの骨材の
特性を示す。Table 1 shows that when the mixing ratio of the high-purity alumina raw material and the magnesia clinker fine powder in the refractory mixture according to the present invention was changed and a part of the high-purity alumina raw material was 0.21 m.
The characteristic of the aggregate when replaced with m or more magnesia clinker is shown.
粒度調整された焼結アルミナクリンカーと仮焼アルミナ
の混合物からなる高純度アルミナ原料に０．２１ｍｍ未
満の海水マグネシアクリンカー微粉を混合し成形したサ
ンプルを１５００℃×３時間加熱した後の残存膨張率及
び見掛け気孔率、または回転浸食法による浸食量とスラ
グ浸潤量との関係を示したものである。A high-purity alumina raw material composed of a mixture of particle size-adjusted sintered alumina clinker and calcined alumina was mixed with seawater magnesia clinker fine powder of less than 0.21 mm to form a sample, and the residual expansion coefficient after heating at 1500 ° C. for 3 hours and It shows the relationship between the apparent porosity or the erosion amount by the rotary erosion method and the slag infiltration amount.
同表から高純度アルミナ原料の浸食量とスラグ浸潤性は
０．２１ｍｍ未満のマグネシアクリンカーが略１〜１０
重量％の場合に良好な結果を示すことが判る。From the table, the erosion amount of the high-purity alumina raw material and the slag infiltrating property are about 1 to 10 for the magnesia clinker of less than 0.21 mm.
It can be seen that good results are obtained in the case of wt%.
第２表は第１表の結果を基に粒度調整された高純度アル
ミナ原料及び０．２１ｍｍ以上のマグネシアクリンカー
１５％と焼結スピネルクリンカー量比との関係につい
て、０．２１ｍｍ未満の海水マグネシアクリンカー微粉
を５重量％、非晶質シリカ１重量％及び硬化剤として比
表面積１２０ｍ２／ｇの活性マグネシアを外掛け２重量
％添加し、所定の水を添加して２０℃で２４時間養生し
たサンプルを用い、回転浸食法により浸食量、スラグ浸
潤と関係を調査したものである。Table 2 shows the relationship between the high-purity alumina raw material whose particle size was adjusted based on the results of Table 1 and the magnesia clinker 15% of 0.21 mm or more and the sintered spinel clinker amount ratio, and the seawater magnesia clinker of less than 0.21 mm. A sample that is 5% by weight of fine powder, 1% by weight of amorphous silica, and 2% by weight of activated magnesia having a specific surface area of 120 m 2 / g as a curing agent is added to the outside, and predetermined water is added to cure at 20 ° C. for 24 hours. Was used to investigate the relationship between the amount of erosion and slag infiltration by the rotational erosion method.
第２表から、耐火材混合物中におけるスピネルクリンカ
ーの配合量は１０〜３０重量％の範囲内で良好な耐溶損
性を示すことが判る。It can be seen from Table 2 that the spinel clinker content in the refractory material mixture is in the range of 10 to 30% by weight, and good erosion resistance is exhibited.
第３表は非晶質シリカ量と強度，耐溶損性の関係につい
て調査したものである。粒度調整された高純度アルミナ
原料６０重量％，０．２１ｍｍ以上のマグネシアクリン
カー１０％，スピネルクリンカー２５重量％，０．２１
ｍｍ未満の海水マグネシアクリンカー微粉５重量％と硬
化剤として比表面積１２０ｍ２／ｇの活性マグネシアを
２重量％外掛け添加した混合物に対し、非晶質シリカを
外掛け添加したときの結果を示す。Table 3 shows the relationship between the amount of amorphous silica, strength, and melt damage resistance. 60% by weight of high-purity alumina raw material whose particle size is adjusted, 10% of magnesia clinker of 0.21 mm or more, 25% by weight of spinel clinker, 0.21
The results obtained by externally adding amorphous silica to a mixture of 5% by weight of fine powder of seawater magnesia clinker less than mm and 2% by weight of active magnesia having a specific surface area of 120 m 2 / g as a curing agent are shown.
所定の水を添加し、２０℃で２４時間養生し、硬化体サ
ンプルを得た。この硬化体サンプルの１１０℃乾燥後の
強度、１５００℃で３時間焼成後の圧縮強度及び回転浸
食法により浸食量とスラグ湿潤量との関係を調査した。Predetermined water was added and cured at 20 ° C. for 24 hours to obtain a cured body sample. The relationship between the strength of this cured sample after drying at 110 ° C. and the compressive strength after firing at 1500 ° C. for 3 hours and the amount of erosion and the amount of wet slag was investigated by the rotary erosion method.
本発明の実施例であるテストＮｏ．２１〜２４は充分な
強度を有し、また高温焼成後の過焼結傾向もなく、かつ
浸食量，スラグ浸潤量及び亀裂に対しても良好な結果を
示す。Test No. which is an example of the present invention. Nos. 21 to 24 have sufficient strength, there is no tendency to oversinter after high-temperature firing, and good results are obtained with respect to erosion amount, slag infiltration amount and cracks.
第４表は、粒度調整された高純度アルミナ原料７４重量
％，燃焼スピネルクリンカー２０重量％，海水マグネシ
アクリンカー５重量％，非晶質シリカ１重量％の混合物
に硬化剤として比表面積１２０ｍ２／ｇの活性マグネシ
アを用い、その外掛け量と２０℃養生後の鋳込み体の硬
化時間及び１１０℃乾燥後の強度、１５００℃焼成後の
強度，線変化率，回転浸食テストによるスラグ浸食量，
スラグ湿潤量及びスポーリングによる亀裂程度との関係
を示す。Table 4 shows that a specific surface area of 120 m 2 / g as a curing agent in a mixture of high-purity alumina raw material whose particle size was adjusted is 74% by weight, combustion spinel clinker 20% by weight, seawater magnesia clinker 5% by weight, and amorphous silica 1% by weight. Of activated magnesia, the external coating amount, the curing time of the cast body after curing at 20 ° C, the strength after drying at 110 ° C, the strength after firing at 1500 ° C, the linear change rate, the slag erosion amount by the rotary erosion test,
The relationship between the slag wet amount and the cracking degree due to spalling is shown.
なお、鋳込み体は所定の水を添加した後に４０×４０×
１６０ｍｍの形状に鋳込み、２０℃で４８時間養生した
後、１１０℃で２４時間乾燥後、１５００℃で３時間焼
成後の品質を測定した。In addition, the cast body is 40 × 40 × after adding predetermined water.
After being cast into a shape of 160 mm, cured at 20 ° C. for 48 hours, dried at 110 ° C. for 24 hours, and calcined at 1500 ° C. for 3 hours, the quality was measured.
同表から、本発明の実施例として示すテスト資料Ｎｏ．
２９，３０は比較例に比べ、作業性においても、耐溶損
性においても、これらの全てを総合して優れた特性を有
すことが判る。From the table, the test material No. shown as an example of the present invention.
It can be seen that, in comparison with Comparative Examples, Nos. 29 and 30 have excellent properties in terms of workability and melting resistance, all of which are combined.
〔発明の効果〕 本発明の流し込み不定形耐火物によって以下の効果を奏
することができる。 [Effects of the Invention] The following effects can be achieved by the cast amorphous refractory material of the present invention.
（１）マグネシア，スピネルクリンカーの併用に際し、
非晶質シリカー効果剤の使用を制約し、過焼結防止から
耐スポーリング性の向上ができた。(1) When using magnesia and spinel clinker together,
The use of the amorphous silica-effect agent was restricted, and the spalling resistance could be improved by preventing oversintering.
（２）従来のアルミナ骨材へのマグネシアの添加は耐食
性向上に有効であった反面、過度のスピネル生成膨張か
らの組織劣化とスラグ浸潤が厚いという問題はあった
が、本発明の耐火物は効果剤として活性マグネシアを用
い、マグネシアクリンカー粒子の配合量を特定すること
によって上記の弊害は受けにくい。(2) Although the addition of magnesia to the conventional alumina aggregate was effective in improving the corrosion resistance, there was a problem that the deterioration of the structure due to excessive spinel formation expansion and the slag infiltration were thick, but the refractory material of the present invention By using active magnesia as an effect agent and specifying the blending amount of magnesia clinker particles, the above-mentioned adverse effects are less likely to occur.
（３）上記（１），（２）によってマグネシア添加によ
る耐食性は大幅に向上する。(3) Due to the above (1) and (2), the corrosion resistance due to the addition of magnesia is significantly improved.
（４）施工に際して適度な効果強度を示す。(4) It shows a moderate effect strength during construction.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 古田 和浩 福岡県北九州市八幡西区東浜町１番１号 黒崎窯業株式会社内 (72)発明者 倉田 浩輔 福岡県北九州市八幡東区枝光１丁目１番１ 号 新日本製鐵株式會社八幡製鐵所内 (72)発明者 松井 泰次郎 福岡県北九州市八幡東区枝光１丁目１番１ 号 新日本製鐵株式會社八幡製鐵所内 (72)発明者 松尾 三郎 福岡県北九州市八幡東区枝光１丁目１番１ 号 新日本製鐵株式會社八幡製鐵所内 (72)発明者 榊 澄生 福岡県北九州市八幡東区枝光１丁目１番１ 号 新日本製鐵株式會社八幡製鐵所内 (56)参考文献 特開 昭60−60986（ＪＰ，Ａ) 特開 昭59−174578（ＪＰ，Ａ) 特開 昭55−85478（ＪＰ，Ａ) 特開 平１−197371（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Furuta 1-1 Higashihama-cho, Hachimansai-ku, Kitakyushu, Fukuoka Prefecture Kurosaki Ceramics Co., Ltd. (72) Inventor Kosuke Kurata 1-1-Emitsu, Hachiman-ku, Kitakyushu, Fukuoka No. 1 Inside Nippon Steel Co., Ltd. Yawata Works (72) Inventor Taijiro Matsui 1-1-1 Edamitsu, Yahata-Higashi-ku, Kitakyushu, Kitakyushu, Fukuoka (72) Inventor Saburo Matsuo 1-1-1, Edamitsu, Yawatahigashi-ku, Kitakyushu, Fukuoka Prefecture Nippon Steel Co., Ltd. Inside Hachiman Works (72) Inventor Sumio Sakaki 1-1-1, Edamitsu, Yawatahi-ku, Kitakyushu, Kitakyushu, Fukuoka Stock of Nippon Steel Incorporated by Kaisha Yawata Works (56) Reference JP-A-60-60986 (JP, A) JP-A-59-174578 (JP, A) JP-A-55-85478 (JP, A) JP-A-1-197371 JP, A)
Claims (2)
％と、 スピネルクリンカーが１０〜３０重量％と、 粒径０．２１ｍｍ未満のマグネシアクリンカーが１〜１
０重量％と、 非晶質シリカが０．２〜３重量％とからなる混合物に、 硬化剤として活性マグネシアを外掛け０．２〜５重量％
配合した流し込み用不定形耐火物。1. A high-purity alumina raw material of at least 57% by weight, a spinel clinker of 10 to 30% by weight, and a magnesia clinker having a particle size of less than 0.21 mm of 1 to 1.
0 to 5% by weight of amorphous silica and 0.2 to 3% by weight of amorphous silica, and 0.2 to 5% by weight of active magnesia as a curing agent.
Blended amorphous refractory for pouring.
％と、 スピネルクリンカーが１０〜３０重量％と、 粒径０．２１ｍｍ以上のマグネシアクリンカーが１〜２
０重量％と、 粒径０．２１ｍｍ未満のマグネシアクリンカーが１〜１
０重量％と、 非晶質シリカが０．２〜３重量％とからなる混合物に、 硬化剤として活性マグネシアを外掛け０．２〜５重量％
配合した流し込み用不定形耐火物。2. High-purity alumina raw material is at least 37% by weight, spinel clinker is 10 to 30% by weight, and magnesia clinker having a particle size of 0.21 mm or more is 1 to 2.
0% by weight, 1 to 1 magnesia clinker having a particle size of less than 0.21 mm
0 to 5% by weight of amorphous silica and 0.2 to 3% by weight of amorphous silica, and 0.2 to 5% by weight of active magnesia as a curing agent.
Blended amorphous refractory for pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1155003A JPH0633179B2 (en) | 1989-06-17 | 1989-06-17 | Irregular refractory for pouring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1155003A JPH0633179B2 (en) | 1989-06-17 | 1989-06-17 | Irregular refractory for pouring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0323275A JPH0323275A (en) | 1991-01-31 |
| JPH0633179B2 true JPH0633179B2 (en) | 1994-05-02 |
Family
ID=15596574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1155003A Expired - Fee Related JPH0633179B2 (en) | 1989-06-17 | 1989-06-17 | Irregular refractory for pouring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633179B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2769400B2 (en) * | 1991-11-29 | 1998-06-25 | 日新製鋼株式会社 | Irregular refractories for hot metal parts |
| JP2604310B2 (en) * | 1992-12-04 | 1997-04-30 | ハリマセラミック株式会社 | Pouring refractories |
| US5681786A (en) * | 1996-10-28 | 1997-10-28 | Krosaki Corporation | Castable refractory rich with alumina coarse grains |
| US5681785A (en) * | 1996-10-28 | 1997-10-28 | Krosaki Corporation | Castable refractory containing alumina coarse grains |
| KR100332903B1 (en) * | 1997-10-06 | 2002-06-20 | 신현준 | Dry charging refractory for induction furnace |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609983B2 (en) * | 1978-12-20 | 1985-03-14 | 黒崎窯業株式会社 | Hydraulic fireproof composition |
| JPS59174578A (en) * | 1983-03-18 | 1984-10-03 | 日本鋼管株式会社 | Basic castable refractories |
| JPS6060986A (en) * | 1983-09-08 | 1985-04-08 | 新日本製鐵株式会社 | Spinel refractories for ladle lining |
| JPS61158872A (en) * | 1984-12-28 | 1986-07-18 | ハリマセラミック株式会社 | Castable refractories |
| JPS6487577A (en) * | 1987-08-29 | 1989-03-31 | Harima Ceramic Co Ltd | Monolithic alumina-spinel refractory |
| JP2872670B2 (en) * | 1988-01-29 | 1999-03-17 | 第一耐火煉瓦株式会社 | Irregular refractories for lining of molten metal containers |
-
1989
- 1989-06-17 JP JP1155003A patent/JPH0633179B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0323275A (en) | 1991-01-31 |
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