JPH05154628A - Nozzle inner hole body for continuous casting - Google Patents
Nozzle inner hole body for continuous castingInfo
- Publication number
- JPH05154628A JPH05154628A JP3323458A JP32345891A JPH05154628A JP H05154628 A JPH05154628 A JP H05154628A JP 3323458 A JP3323458 A JP 3323458A JP 32345891 A JP32345891 A JP 32345891A JP H05154628 A JPH05154628 A JP H05154628A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- nozzle
- steel
- inner hole
- carbon
- 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.)
- Granted
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、鋼の連続鋳造におい
て、取鍋,タンディッシュ等に取付けて使用される連続
鋳造用ノズルの孔部に内挿する内孔体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal hole body which is inserted into a hole portion of a continuous casting nozzle which is used by being attached to a ladle, a tundish or the like in the continuous casting of steel.
【0002】[0002]
【従来の技術】連続鋳造では取鍋からタンディッシュ
へ、あるいはタンディッシュからモールドへロングノズ
ル、タンディッシュノズル、あるいは浸漬ノズル等のノ
ズルを介して溶鋼を移送する。2. Description of the Related Art In continuous casting, molten steel is transferred from a ladle to a tundish or from a tundish to a mold through a nozzle such as a long nozzle, a tundish nozzle or a dipping nozzle.
【0003】このノズルには耐食性,耐スポーリング性
に優れているアルミナ・グラファイト質耐火物が使用さ
れている。An alumina / graphite refractory having excellent corrosion resistance and spalling resistance is used for this nozzle.
【0004】近年、自動車用鋼板を初めとする鋼の加工
性向上の要求に伴う高純化並びにDI缶用ブリキ,シャ
ドーマスク材等に対する介在物のない高清浄化の要求は
ますます強くなっており、連鋳工程におけるカーボンピ
ックアップの防止ならびに表面欠陥と内部欠陥のより少
ない鋼の製造が望まれている。In recent years, there has been an increasing demand for a high degree of purification with the demand for improving the workability of steels such as steel sheets for automobiles, and a high degree of cleanliness without inclusions for tins for DI cans, shadow mask materials, etc. It is desired to prevent carbon pickup in the continuous casting process and to manufacture steel with less surface defects and internal defects.
【0005】このカーボンピックアップ防止対策とし
て、タンディッシュコーティング材のカーボン含有量の
低減や、連鋳用フラックスのカーボン含有量の低減等の
技術開発が行われている。As a measure for preventing this carbon pickup, technical developments such as reduction of carbon content of tundish coating material and reduction of carbon content of continuous casting flux have been carried out.
【0006】また、介在物対策として、溶鋼の脱ガスや
タンディッシュの堰による非金属介在物の吸収、あるい
は浮上等により鋼中介在物の減少の努力が行われてい
る。[0006] As measures against inclusions, efforts are being made to reduce inclusions in steel by degassing molten steel, absorbing nonmetallic inclusions by a tundish weir, or floating.
【0007】ところが、現状のアルミナ・グラファイト
質のノズルでは、鋳造時の稼動面の損傷箇所から鋼中に
カーボンの流出が生じ、カーボンピックアップによる製
品の安定した加工性が得難い欠点がある。また、各種缶
用ブリキ材等のアルミキルド鋼においては、しばしば鋼
中のアルミナの析出により連続鋳造用ノズルのノズル閉
塞が生じ、連続鋳造回数が少なく、生産効率が落ちると
共に、一部閉塞による溶鋼流の乱れが生じノズルを摩耗
し、耐火物による介在物が増加する。However, in the current alumina / graphite nozzle, carbon has a drawback that it is difficult to obtain stable workability of the product by the carbon pickup due to the outflow of carbon from the damaged portion of the operating surface during casting. Also, in aluminum killed steel such as tin materials for various cans, nozzle clogging of the nozzle for continuous casting often occurs due to precipitation of alumina in the steel, the number of continuous casting is small, production efficiency decreases, and molten steel flow due to partial clogging Turbulence occurs, the nozzle is worn, and the inclusion of refractory increases.
【0008】このアルミナによるノズル閉塞を防止する
ためにArガスの吹込みが行われているが、溶鋼流の乱
れによる連鋳用フラックスの巻き込み、Arガスの巻き
込み等により鋼の表面欠陥や介在物の捕捉が生じ、均質
で清浄な鋼の製造には種々の問題がある。Ar gas is blown in to prevent the nozzle from being clogged by alumina, but the surface defects and inclusions of steel are caused by the inclusion of continuous casting flux due to the turbulence of the molten steel flow, the inclusion of Ar gas, and the like. Are trapped, and there are various problems in producing a homogeneous and clean steel.
【0009】このアルミナによるノズル閉塞は、次のよ
うにして生じると考えられる。It is considered that the clogging of the nozzle due to this alumina occurs as follows.
【0010】(1)鋼中のアルミニウムの空気による酸
化と、耐火物中のシリカとカーボンの反応により発生す
る酸素による二次酸化によってアルミナが生成する。(1) Alumina is produced by the oxidation of aluminum in steel by air and the secondary oxidation by oxygen generated by the reaction between silica and carbon in the refractory.
【0011】(2)このアルミナの拡散凝集によってア
ルミナクラスターが形成する。(2) Alumina clusters are formed by the diffusion and aggregation of this alumina.
【0012】(3)ノズルの稼動表面でのカーボンの消
失によって表面が凹凸状になる。(3) Due to the disappearance of carbon on the operating surface of the nozzle, the surface becomes uneven.
【0013】(4)このノズルの稼動表面近傍の50〜
100μm厚には流速0に近い層流域が存在し、この層
流域において溶鋼との比重差又は物理的付着力からアル
ミナクラスターが内壁面に付着する。(4) 50 to 50 near the working surface of this nozzle
There is a laminar flow region with a flow velocity close to 0 at a thickness of 100 μm, and alumina clusters adhere to the inner wall surface in this laminar flow region due to the difference in specific gravity with the molten steel or the physical adhesive force.
【0014】(5)クラスター間には溶鋼中のMn,S
i,Ca,Mg等の酸化物の液相が付着しており、強固
なアルミナクラスター層が形成され、順次アルミナクラ
スター層が厚くなりノズル閉塞となる。(5) Mn and S in molten steel between the clusters
A liquid phase of oxides such as i, Ca, and Mg is attached, a strong alumina cluster layer is formed, and the alumina cluster layer is gradually thickened to cause nozzle clogging.
【0015】このような連続鋳造用ノズルのノズル閉塞
を防止するために、特開昭56−165548号公報,
特開昭57−38366号公報及び特開昭57−563
77号公報には、石灰・カーボン質れんがを使用した連
続鋳造用ノズルが提案されている。In order to prevent such a nozzle clogging of the continuous casting nozzle, Japanese Patent Laid-Open No. 165548/56,
JP-A-57-38366 and JP-A-57-563
No. 77 discloses a nozzle for continuous casting using lime / carbonaceous brick.
【0016】この石灰・カーボン質の連続鋳造用ノズル
の石灰クリンカーは、溶鋼中から析出するアルミナと反
応してCaO・Al2 O3 ,3CaO・Al2 O3 等の
低融点物質となり、ノズル内壁に留まることなく流れる
ので、ノズル閉塞の防止効果があるとされている。更
に、この石灰を形成する石灰クリンカーの消化防止にS
i,Al,Fe,Ni等の金属粉又はBN,B4 C等の
安定剤を加えることによって、ある程度までの消化防止
が可能となっている。しかし、いかなる安定剤を用いて
も石灰クリンカーの消化は抑制できず、アルミナ・グラ
ファイト質のノズルと比較して使用と管理の面で種々の
制限を受ける。The lime clinker of the lime / carbonaceous continuous casting nozzle reacts with the alumina precipitated from the molten steel to become a low melting point substance such as CaO.Al 2 O 3 , 3CaO.Al 2 O 3 and the inner wall of the nozzle. It is said that it has an effect of preventing nozzle clogging because it flows without staying in the nozzle. Furthermore, S is used to prevent digestion of the lime clinker that forms this lime.
By adding metal powders such as i, Al, Fe and Ni or stabilizers such as BN and B 4 C, it is possible to prevent digestion to some extent. However, even if any stabilizer is used, the digestion of lime clinker cannot be suppressed, and there are various restrictions in terms of use and control as compared with the alumina / graphite nozzle.
【0017】つまり、石灰クリンカーの消化によるノズ
ルの亀裂発生を使用現場において充分に点検することは
非常に困難であり、使用上のノズル折れの恐れが常につ
きまとう結果になる。更には、石灰・グラファイト質の
ノズルにおいてカーボンは熱衝撃抵抗性を高めるが、一
方では熱伝導率がよく溶鋼を冷却し易いと共にアルミナ
生成のための酸素供給源となり介在物の発生原因となる
欠点がある。That is, it is very difficult to sufficiently check the occurrence of cracks in the nozzle due to the digestion of lime clinker at the site of use, and the risk of nozzle breakage during use is always present. Furthermore, although carbon enhances thermal shock resistance in lime / graphite nozzles, on the other hand, it has a high thermal conductivity, facilitates cooling of molten steel, and serves as an oxygen supply source for alumina generation, causing the generation of inclusions. There is.
【0018】[0018]
【発明が解決しようとする課題】本発明の目的は、溶鋼
のカーボンピックアップを低減し、鋼中のアルミナの生
成,付着を防止できるアルミナ質ノズルの内孔体を提供
することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an inner hole body of an alumina nozzle capable of reducing carbon pickup of molten steel and preventing generation and adhesion of alumina in steel.
【0019】[0019]
【課題を解決するための手段】本発明の連続鋳造用ノズ
ル内孔体は、アルミナ含有量99重量%以上のアルミナ
クリンカーを主成分とし、アルミナ含有量が70重量%
以上、カーボン含有量が1重量%未満、シリカ含有量が
1重量%未満の耐火物組成を有し、かつ、0.21mm
以下の粒度が20〜70%を占める粒度構成を有するこ
とによってその目的を達成した。The nozzle inner bore for continuous casting according to the present invention comprises an alumina clinker having an alumina content of 99% by weight or more as a main component and an alumina content of 70% by weight.
As described above, the refractory composition has a carbon content of less than 1% by weight and a silica content of less than 1% by weight, and is 0.21 mm.
The object was achieved by having a particle size composition in which the following particle sizes account for 20-70%.
【0020】本発明の内孔体に用いるアルミナ原料は、
電融あるいは焼結クリンカーを使用することができ、組
成的にはAl2 O3 含有量が99重量%以上である。The alumina raw material used for the inner pores of the present invention is
An electromelted or sintered clinker can be used, and in terms of composition, the Al 2 O 3 content is 99% by weight or more.
【0021】上記耐火物組成として、その基地強化のた
めに金属ファイバーを添加することもできる。その材質
は耐食性,構造面からステンレス鋼が最も好ましいが、
これに限らず、たとえば、鉄,炭素鋼やNi−Cr鋼,
Cr−Mo鋼,Cr鋼,Cr−V鋼,Al,Al合金等
の非鉄金属でも構わない。金属ファイバーとしては、形
状はびびり振動切削法により作成されたφ30〜100
μm×2〜20mmが最も好ましいが、ストレート,曲
線,山型,並型形状等のいずれでもよい。金属ファイバ
ーの添加量は5重量%以下の範囲で、各ファイバーの比
重等に合わせて適宜決定する。ごく少ない割合でも効果
が認められるが、金属ファイバーは低融点物質でもあ
り、過剰添加になれば添加水分の増加から耐食性の劣化
を招き、本発明の効果が得られない。更に、好ましい添
加量は0.1〜3重量%である。Metal fibers may be added to the refractory composition to strengthen the matrix. The most preferred material is stainless steel from the viewpoint of corrosion resistance and structure,
Not limited to this, for example, iron, carbon steel or Ni-Cr steel,
Non-ferrous metals such as Cr-Mo steel, Cr steel, Cr-V steel, Al and Al alloys may be used. As the metal fiber, the shape is φ30 to 100 created by the chatter vibration cutting method.
The most preferable is μm × 2 to 20 mm, but any of straight, curved, mountain-shaped, and parallel-shaped shapes may be used. The amount of metal fibers added is in the range of 5% by weight or less, and is appropriately determined according to the specific gravity of each fiber. Although the effect is recognized even with a very small proportion, the metal fiber is also a low melting point substance, and if added excessively, the corrosion resistance is deteriorated due to an increase in added water, and the effect of the present invention cannot be obtained. Further, the preferable addition amount is 0.1 to 3% by weight.
【0022】本発明の連続鋳造用ノズル内孔体を成形す
るに際しては、アルミナ・グラファイト質ロングノズ
ル、浸漬ノズルに内装充填させ、同時に成形する方法
と、あるいは、金枠等に流し込み、あるいは加圧形成
し、内孔体作成後アルミナ・グラファイト質ノズルに内
挿充填する方法のいずれでもよい。In forming the continuous casting nozzle inner hole body of the present invention, the alumina / graphite long nozzle and the dipping nozzle are internally filled and simultaneously formed, or by pouring into a metal frame or the like, or by pressing. Any method may be used in which the inner hole is formed and then the alumina / graphite nozzle is inserted and filled.
【0023】その成形に際しては、水硬性バインダーを
使用し、たとえば、アルミナセメントを使用することも
できる。アルミナセメントはCaO量0.5〜5重量%
の範囲で充分な強度を発現させることが必要であり、低
CaO量で強度発現性の良好な高アルミナセメント,ス
ーパー高アルミナセメントが適する。微粉のアルミナ原
料とアルミナセメントの使用比率は、材料の生成鉱物と
してアルミナセメント中のCaOとアルミナ微粉が反応
し、CaO・6Al2 O3 の生成により膨張性を付与さ
せていることから、CaO量に対し1:6重量%以上の
Al2 O3 が必要である。In the molding, a hydraulic binder may be used, for example, alumina cement may be used. Alumina cement has CaO content of 0.5-5% by weight
It is necessary to develop sufficient strength in the range of, and high-alumina cement and super-high-alumina cement having a low CaO content and good strength development are suitable. The use ratio of the alumina raw material of the fine powder and the alumina cement is the amount of CaO because the CaO in the alumina cement and the fine alumina powder react as the production minerals of the material and CaO · 6Al 2 O 3 is formed to give the expandability. On the other hand, 1: 6 wt% or more of Al 2 O 3 is required.
【0024】[0024]
【作用】本発明は、耐火物中シリカ量の低減、稼動
表面粗度の平滑化、低通気化すなわち緻密化、断熱
効果の向上、カーボンの流出抑制の5つの要素から検
討し、この結果、溶鋼のカーボンピックアップを低減
し、鋼中のアルミナの生成と付着を防止するアルミナ・
グラファイト質ノズルの内孔体を得た。The present invention has been studied from the five factors of reducing the amount of silica in the refractory, smoothing the operating surface roughness, lowering air permeability, that is, densifying, improving the heat insulating effect, and suppressing the outflow of carbon. Alumina that reduces carbon pickup in molten steel and prevents the formation and adhesion of alumina in the steel.
An inner hole of a graphite nozzle was obtained.
【0025】アルミナ含有量を70重量%以上としたの
は、高酸素鋼や弱脱酸鋼等を鋳造する際に、鋼中のFe
O,MnO濃度が高いため、アルミナ含有量が70重量
%未満であると、溶損が大きく内孔体の機能を発現する
ことができないためである。The alumina content of 70% by weight or more means that Fe in the high-oxygen steel or weakly deoxidized steel is cast in the steel.
This is because the O and MnO concentrations are high, and if the alumina content is less than 70% by weight, the melting loss is large and the function of the inner pore body cannot be exhibited.
【0026】また、高酸素鋼や弱脱酸鋼等の特殊鋼以外
の一般鋼についても、溶損速度のレベルは異なるものの
傾向は同一であるため、ノズル内孔体の耐用面及び鋼の
高清浄化の観点からアルミナ含有量としては70重量%
以上が必要である。Also, general steels other than special steels such as high-oxygen steels and weakly deoxidized steels have the same tendency although the levels of erosion rates are different. From the viewpoint of purification, the alumina content is 70% by weight
The above is necessary.
【0027】使用粒度構成として、0.21mm以下が
20重量%未満であると、最密充填組成から外れるた
め、組織の緻密化、通気率の上昇及び表面粗度の関係か
ら、本発明の効果が期待されない。また、70重量%超
であると微粉過多となり、容積安定性の問題が生じる。When the particle size composition of 0.21 mm or less is less than 20% by weight, the composition is out of the close-packed composition, so that the effect of the present invention can be obtained from the relations of structure densification, increase in air permeability and surface roughness. Is not expected. On the other hand, if it exceeds 70% by weight, the amount of fine powder becomes excessive, which causes a problem of volume stability.
【0028】[0028]
【実施例】図1〜図8は本発明を適用したノズルの例を
示すもので、図1〜図4は浸漬ノズルの例を示し、図5
〜図8はロングノズルの例を示す。これらの図におい
て、1はアルミナ−グラファイト質耐火物、2は本発明
に係るノズル内孔体の配置を示すもので、内孔体2の厚
みよりもアルミナ−グラファイト質耐火物1の厚みを厚
く形成している。図4、図6および図8に内孔体の背面
に膨張吸収機能を有するアルミナ質モルタル層3を設け
た例を示す。1 to 8 show examples of nozzles to which the present invention is applied, FIGS. 1 to 4 show examples of immersion nozzles, and FIG.
8 shows an example of a long nozzle. In these figures, 1 is an alumina-graphite refractory material, 2 is the arrangement of the nozzle inner hole body according to the present invention, and the thickness of the alumina-graphite refractory material 1 is made larger than the thickness of the inner hole body 2. Is forming. 4, 6 and 8 show an example in which an alumina mortar layer 3 having an expansion absorbing function is provided on the back surface of the inner hole body.
【0029】実施例1 アルミナ99重量%以上を有する耐火骨材で、0.21
mm径以上の粒子を45重量%、0.21mm径未満の
粒子を40重量%に、スーパー高アルミナセメント15
重量%の耐火物を得た。これの組成を表1に示す。この
耐火物に90μm×6mmのSUSからなるメタルファ
イバーを外掛けで2%添加した。この特性を同じく表1
に示す。比較のために、表1の比較品の組成と従来のア
ルミナ−グラファイト耐火物を調製した。Example 1 A refractory aggregate having 99% by weight or more of alumina, 0.21
45% by weight of particles with a diameter of mm or more, 40% by weight of particles with a diameter of less than 0.21 mm, super high alumina cement 15
A weight percent refractory material was obtained. The composition of this is shown in Table 1. To this refractory, 2% of a metal fiber made of SUS having a size of 90 μm × 6 mm was externally added. This characteristic is also shown in Table 1.
Shown in. For comparison, the comparative composition of Table 1 and a conventional alumina-graphite refractory were prepared.
【0030】[0030]
【表1】 これらの耐火物から連続鋳造用ノズル内孔体をロングノ
ズル及び浸漬ノズル内孔に内張りし、図4と図8に示す
ノズルを得た。極低炭素鋼の連続鋳造におけるカーボン
ピックアップ防止対策として実機テストに供した。[Table 1] From these refractories, a continuous casting nozzle inner hole was lined in the long nozzle and the immersion nozzle inner hole to obtain the nozzle shown in FIGS. 4 and 8. As a measure to prevent carbon pickup in continuous casting of ultra-low carbon steel, it was subjected to an actual machine test.
【0031】テストの結果、従来のアルミナグラファイ
ト質ノズルを使用した場合に比較して図9のようにカー
ボンピックアップの低減効果が見られた。また、ロング
ノズル,浸漬ノズルの内孔体、母材ともに亀裂の発生は
なく、内孔体の溶損は図10に示すようにアルミナグラ
ファイト質に比べて非常に軽微であり、ロングノズルに
ついては再使用も可能であった。As a result of the test, as compared with the case where the conventional alumina graphite material nozzle is used, the effect of reducing the carbon pickup is seen as shown in FIG. In addition, no cracks were formed in the inner nozzles of the long nozzles and the immersion nozzles, and the base material, and the melting loss of the inner nozzles was much smaller than that of alumina graphite as shown in FIG. 10. It could be reused.
【0032】実施例2 表1に示すアルミナ99重量%以上を有する耐火骨材
で、0.21mm以上の径を有する粒子が50重量%、
0.21mm未満の径を有する粒子が50重量%の粒度
構成を有し、同表の特性を有する耐火物から図3に示す
ノズルを作成し実機テストに供した。Example 2 A refractory aggregate having 99% by weight or more of alumina shown in Table 1 and 50% by weight of particles having a diameter of 0.21 mm or more,
Particles having a diameter of less than 0.21 mm had a particle size constitution of 50% by weight, and a nozzle shown in FIG. 3 was prepared from a refractory material having the characteristics shown in the table and subjected to an actual machine test.
【0033】アルミキルド鋼を鋳造し、従来のアルミナ
グラファイト質ノズルと比較したところ、図11,12
に示すように、本発明品は介在物の付着がほとんどな
く、鋳片の非金属介在物数並びに表面欠陥,内部欠陥は
共に少なくなり、良好な結果を示した。When aluminum-killed steel was cast and compared with a conventional alumina-graphite nozzle, FIGS.
As shown in Table 1, the product of the present invention showed almost no inclusions, and the number of non-metallic inclusions in the slab and the number of surface defects and internal defects were small, showing good results.
【0034】また、保熱効果により、本発明品の内孔体
の稼動表面への地金の付着は全く見られなかった。Further, due to the heat retaining effect, no metal adhesion was observed on the operating surface of the inner hole body of the present invention.
【0035】[0035]
【発明の効果】本発明の連続鋳造用ノズル内孔体を使用
することにより、極低炭素鋼鋳造におけるカーボンピッ
クアップを低減し、また、連続鋳造用ノズルのアルミナ
クラスター層の形成によるノズル閉塞を防止し、鋼中の
非金属介在物及び表面欠陥,内部欠陥を減少させること
ができる。EFFECTS OF THE INVENTION By using the continuous casting nozzle inner hole body of the present invention, carbon pickup in extremely low carbon steel casting is reduced, and nozzle clogging due to formation of the alumina cluster layer of the continuous casting nozzle is prevented. However, it is possible to reduce non-metallic inclusions, surface defects and internal defects in the steel.
【0036】したがって、鋼に対する高純化,清浄化に
対して充分に貢献するものであり、鋼の品質を大きく向
上させ得るものである。Therefore, it contributes sufficiently to high purification and cleaning of steel, and can greatly improve the quality of steel.
【図1】 本発明の適用ノズルの例としての浸漬ノズル
を示す。FIG. 1 shows an immersion nozzle as an example of an application nozzle of the present invention.
【図2】 浸漬ノズルの他の例を示す。FIG. 2 shows another example of the immersion nozzle.
【図3】 浸漬ノズルの他の例を示す。FIG. 3 shows another example of the immersion nozzle.
【図4】 浸漬ノズルの他の例を示す。FIG. 4 shows another example of the immersion nozzle.
【図5】 本発明の適用ノズルの例としてのロングノズ
ルを示す。FIG. 5 shows a long nozzle as an example of an applicable nozzle of the present invention.
【図6】 ロングノズルの他の例を示す。FIG. 6 shows another example of a long nozzle.
【図7】 ロングノズルの他の例を示す。FIG. 7 shows another example of a long nozzle.
【図8】 ロングノズルの他の例を示す。FIG. 8 shows another example of a long nozzle.
【図9】 本発明の実施例と比較例との実施効果として
Cのピックアップの状態の比較を示す。FIG. 9 shows a comparison of the states of the pickup of C as the effects of the embodiment of the present invention and the comparative example.
【図10】 内孔部での溶損量の比較を示す。FIG. 10 shows a comparison of the amount of erosion loss in the inner hole portion.
【図11】 介在物付着の厚みの比較を示す。FIG. 11 shows a comparison of the thickness of inclusions.
【図12】 製品不合格発生率の比較を示す。FIG. 12 shows a comparison of product failure occurrence rates.
1 アルミナ−グラファイト質耐火物 2 内孔体 3 アルミナ質モルタル層 1 Alumina-graphite refractory 2 Inner pore 3 Alumina mortar layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西 敬 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 松井 泰次郎 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 西原 良治 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 福永 新一 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kei Nishi Nishi 1-1, Higashihama-cho, Hachiman-nishi-ku, Kitakyushu, Fukuoka Prefecture Kurosaki Ceramics Co., Ltd. Inside Nippon Steel Co., Ltd. Yawata Works (72) Inventor Ryoji Nishihara No. 1 Tobahata-cho, Tobata-ku, Kitakyushu City, Kitakyushu, Fukuoka Prefecture (72) Inventor Shinichi Fukunaga Kitakyushu, Fukuoka Prefecture No. 1-1 Toibata-cho, Tobata-ku, Shizuoka Inside the Yawata Works, Nippon Steel Corporation
Claims (1)
ナクリンカーを主成分とし、アルミナ含有量が70重量
%以上、カーボン含有量が1重量%未満、シリカ含有量
が1重量%未満の耐火物組成を有し、かつ、0.21m
m以下の粒度が20〜70%を占める粒度構成を有する
連続鋳造用ノズル内孔体。1. A refractory composition containing, as a main component, an alumina clinker having an alumina content of 99% by weight or more, an alumina content of 70% by weight or more, a carbon content of less than 1% by weight, and a silica content of less than 1% by weight. And has 0.21 m
A nozzle inner hole body for continuous casting having a particle size constitution in which a particle size of m or less accounts for 20 to 70%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3323458A JP2781483B2 (en) | 1991-12-06 | 1991-12-06 | Nozzle for continuous casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3323458A JP2781483B2 (en) | 1991-12-06 | 1991-12-06 | Nozzle for continuous casting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05154628A true JPH05154628A (en) | 1993-06-22 |
JP2781483B2 JP2781483B2 (en) | 1998-07-30 |
Family
ID=18154904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3323458A Expired - Lifetime JP2781483B2 (en) | 1991-12-06 | 1991-12-06 | Nozzle for continuous casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2781483B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995034395A1 (en) * | 1994-06-15 | 1995-12-21 | Vesuvius France S.A. | Casting part comprising an external layer appropriate to form a gas impervious layer, and implementation process |
US5681499A (en) * | 1994-06-15 | 1997-10-28 | Vesuvius Crucible Company | Method and compositions for making refractory shapes having dense, carbon free surfaces and shapes made therefrom |
US5691061A (en) * | 1994-06-15 | 1997-11-25 | Vesuvius Crucible Company | Refractory shape having an external layer capable of forming a layer impermeable to gases and process for its preparation |
EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
EP0885674A1 (en) * | 1996-11-18 | 1998-12-23 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
WO2005087406A1 (en) * | 2004-03-15 | 2005-09-22 | Krosakiharima Corporation | Nozzle for use in continuous casting |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63112057A (en) * | 1986-10-29 | 1988-05-17 | Nippon Steel Corp | Submerged nozzle for continuous casting |
JPH03243258A (en) * | 1990-02-20 | 1991-10-30 | Nisshin Steel Co Ltd | Nozzle for continuous casting |
-
1991
- 1991-12-06 JP JP3323458A patent/JP2781483B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63112057A (en) * | 1986-10-29 | 1988-05-17 | Nippon Steel Corp | Submerged nozzle for continuous casting |
JPH03243258A (en) * | 1990-02-20 | 1991-10-30 | Nisshin Steel Co Ltd | Nozzle for continuous casting |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995034395A1 (en) * | 1994-06-15 | 1995-12-21 | Vesuvius France S.A. | Casting part comprising an external layer appropriate to form a gas impervious layer, and implementation process |
FR2721241A1 (en) * | 1994-06-15 | 1995-12-22 | Vesuvius France Sa | Casting nozzle comprising an internal jacket capable of forming a gas-impermeable layer and method of implementation. |
US5681499A (en) * | 1994-06-15 | 1997-10-28 | Vesuvius Crucible Company | Method and compositions for making refractory shapes having dense, carbon free surfaces and shapes made therefrom |
US5691061A (en) * | 1994-06-15 | 1997-11-25 | Vesuvius Crucible Company | Refractory shape having an external layer capable of forming a layer impermeable to gases and process for its preparation |
EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
US5908577A (en) * | 1996-08-26 | 1999-06-01 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
EP0885674A1 (en) * | 1996-11-18 | 1998-12-23 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
EP0885674A4 (en) * | 1996-11-18 | 1998-12-30 | ||
US5979720A (en) * | 1996-11-18 | 1999-11-09 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
WO2005087406A1 (en) * | 2004-03-15 | 2005-09-22 | Krosakiharima Corporation | Nozzle for use in continuous casting |
US7591976B2 (en) | 2004-03-15 | 2009-09-22 | Krosakiharima Corporation | Nozzle for use in continuous casting |
Also Published As
Publication number | Publication date |
---|---|
JP2781483B2 (en) | 1998-07-30 |
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