JPH0620622B2 - Nozzle for continuous casting - Google Patents
Nozzle for continuous castingInfo
- Publication number
- JPH0620622B2 JPH0620622B2 JP60163997A JP16399785A JPH0620622B2 JP H0620622 B2 JPH0620622 B2 JP H0620622B2 JP 60163997 A JP60163997 A JP 60163997A JP 16399785 A JP16399785 A JP 16399785A JP H0620622 B2 JPH0620622 B2 JP H0620622B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- continuous casting
- steel
- molten steel
- present
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は連鋳用耐火物として用いられるロングノズル、
浸漬ノズル、シヨートノズル等に関する。TECHNICAL FIELD The present invention relates to a long nozzle used as a refractory for continuous casting,
The present invention relates to a dipping nozzle, a short nozzle, and the like.
従来の技術 近年高級ラインパイプ材、カラーテレビ用シヤドウ・マ
スク材、自動車用鋼板、清涼飲料またはビール缶用ブリ
キ材、海洋構造物用等に用いられる鋼に対する清浄度の
要求は増々強くなつてきており、表面欠陥あるいは内在
欠陥のより少ない均質な鋼が望まれている。2. Description of the Related Art In recent years, the demand for cleanliness has become stronger and stronger for high-grade line pipe materials, color television shear-mask materials, steel sheets for automobiles, tin materials for soft drinks or beer cans, and steel for offshore structures. Therefore, a homogeneous steel with less surface defects or internal defects is desired.
この為、溶鋼の脱ガスやタンデイツシユの堰による非金
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。特に清涼飲料またはビール缶用
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Al2O3ゾルの析出により、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
ととも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。あるいはアルミ
ナ閉塞を防止するためにArガスの吹き込みが行われてい
るが、溶鋼流の乱れによる連鋳用添加剤の巻き込み、Ar
ガスの巻き込み等により鋼の表面欠陥や内在欠陥が生じ
易く、均質で清浄な鋼の製造には種々の問題がある。こ
のアルミナによるノズル閉塞は次のように生じると考え
られる。すなわち、(1)溶鋼温度の低下に伴い発生する
遊離酸素と鋼中アルミニウムが反応しAl2O3 ゾルが析出
する、(2)このAl2O3 ゾルが拡散凝集しブラウン運動（B
rownian motion）などによりAl2O3 クラスターが形成さ
れる、(3)一方ノズルれんがの稼働面では黒鉛が消失し
表面が凹凸状となる、(4)このノズルれんがの稼働面近
傍には５０−１００μの流速０に近い層流膜が存在し、
溶鋼との比重差または物理的付着力からAl2O3 クラスタ
ーが内壁面に付着する、(5)付着したクラスター間の溶
鋼は、鋼中のガスや耐火物から起因するSiO2分解ガス等
と入替り流出する、(6)クラスター間には溶鋼中の酸化
物（Mn、Si、Ca等）の液相が付着しており、強固なAl2O
3 クラスター層が形成され、順次Al2O3 クラスター層が
厚くなり、ノズル閉塞となる。Therefore, efforts are being made to reduce the inclusions in the steel by degassing the molten steel and absorbing or floating non-metallic inclusions by the weir of the tundish. Particularly in aluminum-killed steel such as tinplate for soft drinks or beer cans, the precipitation of Al 2 O 3 sol in the steel often causes nozzle clogging of the nozzle for continuous casting, which reduces the number of continuous castings and reduces production efficiency. Disturbance of the molten steel flow occurs due to partial blockage, the nozzle is abraded, and inclusions due to the refractory material increase. Alternatively, Ar gas is blown in to prevent alumina blockage, but the inclusion of additive for continuous casting due to turbulence of molten steel flow, Ar gas
Since surface defects and internal defects of steel are likely to occur due to gas entrainment and the like, there are various problems in producing homogeneous and clean steel. It is considered that the nozzle clogging due to this alumina occurs as follows. That is, (1) free oxygen generated with the decrease of molten steel temperature reacts with aluminum in steel to precipitate Al 2 O 3 sol, (2) this Al 2 O 3 sol diffuses and agglomerates, and Brownian motion (B
Rownian motion) is Al 2 O 3 clusters due to be formed, (the surface graphite is lost an uneven shape in the running surface 3) On the other hand nozzle brick (4) is in operation the vicinity of the nozzle brick 50- There is a laminar flow film with a flow velocity close to 0 at 100μ,
Adhering the difference in specific gravity or physical adhesion between the molten steel Al 2 O 3 clusters inner wall (5) of molten steel between the deposited clusters, and SiO 2 decomposition gas or the like due from the gases and refractories in the steel The liquid phase of oxides (Mn, Si, Ca, etc.) in the molten steel adheres between the (6) clusters that are exchanged and flow out, forming a strong Al 2 O
Three cluster layers are formed, and the Al 2 O 3 cluster layer becomes thicker in sequence, resulting in nozzle clogging.
この種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５７−56377号公報には、石灰・炭素質
れんがの連続鋳造用ノズルが提案されている。この石灰
・炭素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Al2O3 ゾルと反応してCaO・Al2O3、３CaO・A
l2O3などの低融点物質となり、ノズル内壁に止まること
が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。さらに石灰クリンカーの消化防止にSi，Al，Fe，
Ni等の金属粉またはBN，B4Cといつた添加物が加えら
れ、ある程度の消化防止が可能となつている。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、通常用いられているアルミナ・グラフアイト質
のノズルと比べると保管上、使用上十分過ぎる程の注意
を払わなければならない。すなわち、石灰クリンカーの
消化によるノズルの亀裂発生を使用する現場において十
分点検することは難しく、使用時のノズル折れといつた
心配が常につきまとうことになる。さらには、石灰クリ
ンカー・炭素質のノズルにおいて炭素は熱衝撃抵抗性を
高めるが一方では熱伝導率が良く、溶鋼を冷やしやすく
溶鋼中にAl2O3 ゾルを析出させ、凝集させやすく、介在
物の発生原因となり易い欠点がある。In order to prevent the nozzle clogging of this type of continuous casting nozzle, Japanese Patent Laid-Open Nos. 56-165548, 57-38366 and 57-56377 disclose lime / carbonaceous bricks. Nozzles for continuous casting have been proposed. The lime clinker of this lime / carbonaceous continuous casting nozzle reacts with the Al 2 O 3 sol precipitated from molten steel to CaO ・ Al 2 O 3 , 3CaO ・ A
It becomes a low-melting substance such as l 2 O 3 and flows without stopping on the inner wall of the nozzle, so it is said to have the effect of preventing nozzle clogging. Furthermore, to prevent the digestion of lime clinker, Si, Al, Fe,
Metal powder such as Ni or BN, B 4 C and other additives are added, and it is possible to prevent digestion to some extent. But,
Digestion of lime clinker cannot be suppressed by using any stabilizer, and care must be exercised in terms of storage and use as compared with the commonly used nozzle of alumina graphite. That is, it is difficult to thoroughly inspect the occurrence of cracks in the nozzle due to the digestion of lime clinker in the field where the nozzle is used, and nozzle breakage and anxiety during use are always associated. Furthermore, although carbon enhances thermal shock resistance in the lime clinker / carbonaceous nozzle, on the other hand, it has good thermal conductivity, makes it easy to cool the molten steel, precipitates Al 2 O 3 sol in the molten steel, easily agglomerates, and inclusions There is a drawback that is likely to cause the occurrence of.
問題点を解決するための手段 本発明は連続鋳造用ノズルのノズル閉塞を防止し、鋼の
表面欠陥、内部欠陥を減少させ鋼の品質を向上するもの
である。Means for Solving the Problems The present invention prevents nozzle clogging of a continuous casting nozzle, reduces surface defects and internal defects of steel, and improves the quality of steel.
本発明者らは、連続鋳造用ノズルの内面に石灰石あるい
は苦灰石から作られた内部層を形成させ鋼中より析出す
るゾル状のアルミナを吸収あるいは低融点物質として流
れさせることによつてアルミナ閉塞の防止が出来ること
を見い出したものである。The present inventors formed an inner layer made of limestone or dolomite on the inner surface of a nozzle for continuous casting, and caused sol-like alumina precipitated from steel to absorb or flow as a low-melting-point substance. It has been found that blocking can be prevented.
本発明は石灰石あるいは苦灰石の１種又は２種の１００
重量部とハロゲン化化合物あるいはアルカリ金属の無機
化合物あるいは有機化合物の１種以上を０．１〜２０重
量部添加して出来る耐火物をアルミナ・グラフアイト質
のノズルの内側の溶鋼の通過箇所１〜１５mmの厚みの層
を形成させあるいは挿入してなるものである。The present invention is one or two kinds of limestone or dolomite.
1 part by weight and 0.1-20 parts by weight of one or more kinds of halogenated compounds or inorganic compounds or organic compounds of alkali metals is added to the refractory material, and molten steel passes through the inside of the nozzle of alumina-grafite 1- It is formed by forming or inserting a layer having a thickness of 15 mm.
第１図に本発明の浸漬ノズルの模式図を示す。FIG. 1 shows a schematic view of the immersion nozzle of the present invention.
本発明に用いる石灰石あるいは苦灰石は特に限定するも
のでなく、通常製鋼用石灰の原料として用いられている
石灰石あるいは耐火物用ドロマイトクリンカーとして用
いられている苦灰石で良い。粒度は通常耐火物に用いら
れている粒度が適用出来る。The limestone or dolomite used in the present invention is not particularly limited, and may be limestone usually used as a raw material of lime for steelmaking or dolomite clinker for refractory. As the particle size, the particle size commonly used for refractories can be applied.
結合剤としてはハロゲン化化合物あるいはアルカリ金属
の無機化合物又は有機化合物が用いられる。これ以外の
化合物では石灰石及び苦灰石は予熱時あるいは鋼注入時
に収縮をひきおこし剥離してしまい使用出来ない。すな
わち、ハロゲン化化合物あるいはアルカリ金属の無機化
合物又は有機化合物を添加した石灰石、苦灰石の焼成後
の収縮率は０〜２％程度でおさまるのに対し、その他の
化合物を用いた場合１０％以上の収縮率を示す。これは
とりもなおさず熱間の容積安定性が欠除していることを
示すものである。本発明の結合剤の添加量は０．１〜２
０重量部が望ましく、０．１重量部未満では1400℃での
熱間曲げ強度が５kg／cm2以下となり結合力が不足し、
溶鋼の流速による摩耗に弱く、また２０重量部を超える
と、1400℃での熱間曲げ強度が５kg／cm2以下となつて
結合力が低下するため好ましくない。結合力の点から本
発明の結合剤の添加量は３〜１０重量部が1400℃の熱間
曲げ強度が３０kg／cm2以上となり好ましい。具体的に
用いる化合物の例をあげると塩化ナトリウム、塩化カル
シウム、塩化マグネシウム、フツ化リチウム等のハロゲ
ン化化合物や、ヘキサメタリン酸ナトリウム、リン酸１
カリウム等のアルカリリン酸塩、３号珪酸ソーダ、珪酸
リチウム等のアルカリ珪酸塩、硼砂等のアルカリ硼酸
塩、アルミン酸ソーダ等のアルカリアルミン酸塩、炭酸
ソーダ等のアルカリ炭酸塩、あるいはクエン酸ソーダ等
のアルカリ有機化合物を使用することができる。これら
の化合物は１種または２種以上を用いることにより熱間
の容積安定性を確保するとともに、熱間強度を発現させ
る等の調整が出来る。As the binder, a halogenated compound or an inorganic or organic compound of an alkali metal is used. With other compounds, limestone and dolomite cannot be used because they cause contraction during preheating or during steel injection and peel off. That is, the shrinkage rate of limestone and dolomite added with a halogenated compound or an inorganic compound or organic compound of an alkali metal is about 0 to 2%, whereas when other compounds are used, it is 10% or more. The shrinkage ratio of This shows that the volume stability of heat is lacking. The addition amount of the binder of the present invention is 0.1 to 2
0 parts by weight is desirable, and if less than 0.1 parts by weight, the hot bending strength at 1400 ° C is 5 kg / cm 2 or less, and the bonding strength is insufficient,
It is unfavorable because it is weak against wear due to the flow rate of molten steel, and when it exceeds 20 parts by weight, the hot bending strength at 1400 ° C. becomes 5 kg / cm 2 or less and the bonding strength decreases. From the viewpoint of bonding strength, the amount of the binder of the present invention added is preferably 3 to 10 parts by weight because the hot bending strength at 1400 ° C. is 30 kg / cm 2 or more. Specific examples of the compound used include halogenated compounds such as sodium chloride, calcium chloride, magnesium chloride and lithium fluoride, sodium hexametaphosphate and phosphoric acid 1
Alkali phosphate such as potassium, sodium silicate No. 3, alkali silicate such as lithium silicate, alkali borate such as borax, alkali aluminate such as sodium aluminate, alkali carbonate such as sodium carbonate, or sodium citrate. Alkali organic compounds such as By using one kind or two or more kinds of these compounds, it is possible to ensure the volume stability during heat and make adjustments such as expressing hot strength.
以上の石灰質耐火物を水あるいはアクリル系共重合樹脂
エマルジヨン等を数％添加し混練する。すなわち、生角
強度が得られがたい時には、水のかわりにアクリル系共
重合樹脂エマルジヨン等の有機系糊剤も使用することが
できる。The above calcareous refractory is kneaded by adding a few% of water or acrylic copolymer emulsion. That is, when it is difficult to obtain green horn strength, an organic sizing agent such as an acrylic copolymer resin emulsion can be used instead of water.
このような石灰石あるいは苦灰石からなる石灰質耐火物
をアルミナ・グラフアイト質のノズルの内面に形成する
か、あるいはパイプ状のものを挿入する。石灰質耐火物
の肉厚は１〜１５mmが望ましく１mm未満では断熱効果及
びアルミナ吸収効果が低く好ましくない、１５mmを超え
ても効果はほとんど変わりなく、ノズル肉厚化となるだ
けであり、実用的効果はない。A calcareous refractory made of such limestone or dolomite is formed on the inner surface of an alumina-graphite nozzle, or a pipe-shaped one is inserted. The thickness of the calcareous refractory is preferably 1 to 15 mm, and if it is less than 1 mm, the heat insulating effect and the alumina absorbing effect are low, which is not preferable. If it exceeds 15 mm, the effect is almost the same and only the thickness of the nozzle is increased. There is no.
本発明の連続鋳造用ノズルは、使用までにあたつて何ら
石灰の消化を心配する必要がなく長期の保存が可能であ
る。The continuous casting nozzle of the present invention does not need to worry about digestion of lime before use and can be stored for a long period of time.
使用にあたつては通常連続鋳造用ノズルは予熱される
が、この時本発明品は1000℃以上で充分に加熱し、石灰
石あるいは苦灰石の炭酸ガスを解離させ、気孔率６０％
以上の多孔生のCaOを形成させる。この多孔性のCaO層の
熱伝導率は1200℃で０．３Kcal／m.hr.℃と低くすぐれ
た断熱性を有するので溶鋼の冷却を防ぎAl2O3 ゾルの析
出と凝集を防止できる。かつ、活性なCaO層はAl2O3 ゾ
ルと反応し、吸収する特徴を有する。また万一Al2O3 ゾ
ルが凝集しCaO層表面にAl2O3クラスター層が形成されて
も、CaOとAl2O3 の反応生成物はAl2O3 リツチになるに
従つて低融点化するため、Al2O3 クラスター層が形成さ
れても容易に流出するためノズル閉塞はおこりがたい。
また、Al2O3・グラフアイト質ノズルのグラフアイトの
酸化を防止できるのでノズルの酸化に起因するAl2O3の
大型介在物を減少することが出来る。In use, the nozzle for continuous casting is usually preheated, but at this time, the product of the present invention is sufficiently heated at 1000 ° C. or more to dissociate carbon dioxide gas of limestone or dolomite, and the porosity is 60%.
The above porous CaO is formed. The thermal conductivity of this porous CaO layer is as low as 0.3 Kcal / m.hr. ° C. at 1200 ° C., and it has excellent heat insulating properties, so that cooling of molten steel can be prevented and precipitation and aggregation of Al 2 O 3 sol can be prevented. In addition, the active CaO layer has a characteristic that it reacts with and absorbs Al 2 O 3 sol. Even if the Al 2 O 3 sol aggregates and an Al 2 O 3 cluster layer is formed on the surface of the CaO layer, the reaction product of CaO and Al 2 O 3 has a low melting point as it becomes an Al 2 O 3 latch. Therefore, even if an Al 2 O 3 cluster layer is formed, it easily flows out, and nozzle clogging is unlikely to occur.
Further, since the oxidation of the graphite of the Al 2 O 3 · graphite type nozzle can be prevented, large inclusions of Al 2 O 3 caused by the oxidation of the nozzle can be reduced.
連続鋳造用ノズルでスラグあるいは連鋳用添加剤と接触
する部分にはZrO2・グラフアイト質で補強することもで
きる。The part of the continuous casting nozzle that comes into contact with the slag or the additive for continuous casting can be reinforced with ZrO 2 · graphite.
以下に実施例を述べる。Examples will be described below.
実施例１ 表１に本発明に用いたAl2O3・グラフアイト質ノズルの品
質を示す。Example 1 Table 1 shows the quality of the Al 2 O 3 · graphite nozzle used in the present invention.
本発明の２層構成の浸漬ノズルの構成の一部である石灰
質耐火物の品質を表２に示す。Table 2 shows the quality of the calcareous refractory which is a part of the structure of the two-layer immersion nozzle of the present invention.
本発明品のＩ〜IIIはAl2O3・グラフアイト質と同時にラ
バープレスを実施し、８００℃にて還元焼成して得たも
のである。また、本発明品IV、Ｖは出来あがつたAl2O3・
グラフアイト質のノズルを施削加工して、あらかじめラ
バープレスで成形した不焼成の石灰質耐火物の円筒状の
ものを挿入したものである。成形圧はいずれも１トン／
cm2である。The products I to III of the present invention were obtained by performing rubber pressing simultaneously with Al 2 O 3 · graphite and reducing and firing at 800 ° C. The products IV and V of the present invention are the finished Al 2 O 3
This is a cylinder-shaped unfired calcareous refractory that is preliminarily molded by a rubber press and is machined by a graphitized nozzle. Molding pressure is 1 ton /
It is cm 2 .
実施例２ 表２に示した本発明品の浸漬ノズルをＡ社３５トン タ
ンデイツシユに用いた。鋼種はアルミキルド鋼であり、
従来のAl2O3・グラフアイト浸漬ノズルとの比較を行つ
た。石灰質耐火物を内装した本発明品の浸漬ノズルはア
ルゴン・ガスの吹き込みはせず、従来のAl2O3・グラフア
イト質浸漬ノズルは５／分のアルゴン・ガスを吹き込
んだ、この結果、本発明品のAl2O3 付着はほとんどな
く、鋼片の表面欠陥率及び非金属介在物数ともに少なく
良好な性状を示した。この結果を表３に示す。 Example 2 The immersion nozzle of the product of the present invention shown in Table 2 was used for a 35 ton tundish of Company A. The steel type is aluminum killed steel,
A comparison was made with the conventional Al 2 O 3 · grafite immersion nozzle. The immersion nozzle of the present invention containing the calcareous refractory did not blow argon gas, and the conventional Al 2 O 3 · graphite immersion nozzle blows 5 minutes of argon gas. The invention product showed almost no adhesion of Al 2 O 3 , and both the surface defect rate of the steel slab and the number of non-metallic inclusions were small, showing good properties. The results are shown in Table 3.
発明の効果 以上の如く本発明の連続鋳造用ノズルはすぐれた断熱
性、Al2O3 吸収性等を示し、このためAl2O3ゾルの付着
によノズル閉塞がなくなり、安定した操業が出来るとと
もに鋼の品質も向上した。 EFFECTS OF THE INVENTION As described above, the continuous casting nozzle of the present invention exhibits excellent heat insulation properties, Al 2 O 3 absorption properties, etc. Therefore, nozzle clogging due to adhesion of Al 2 O 3 sol is eliminated and stable operation is possible. At the same time, the quality of steel has improved.
本発明による効果を要約すれば次のとおりである。The effects of the present invention can be summarized as follows.
1) 本発明の石灰質内部層は使用時点までなんら消化の
心配がなく簡便な取り扱いが出来る。1) The calcareous inner layer of the present invention can be easily handled without any worry of digestion until the time of use.
2) 使用時の予熱により見掛気孔率６０％前後の多孔の
断熱層を形成し溶鋼の冷却を防止し、アルミナゾルの発
生凝集を抑制する。2) By preheating during use, a porous heat insulating layer with an apparent porosity of about 60% is formed to prevent cooling of molten steel and suppress the generation and aggregation of alumina sol.
3) 予熱後は活性なCaOとなるため鋼中のアルミナを吸
収できる。あるいは低融物を形成させてノズル内壁にと
どまらせることなく流出することができる。3) It becomes active CaO after preheating and can absorb alumina in steel. Alternatively, a low melt can be formed and flow out without remaining on the inner wall of the nozzle.
4) アルミナ−グラフアイト質ノズルの酸化を防止出
来、ノズルに起因する大型介在物を防止出来る。4) Alumina-Graphite nozzle can be prevented from oxidizing and large inclusions caused by the nozzle can be prevented.
第１図〜第５図は本発明ノズルの実施例のうち、表３に
示すＩ〜Ｖのノズルの縦断面図、第６図は本発明ノズル
の他の例を示す縦断面図であり、図中１はAl2O3・グラ
フアイト質耐火物、２はZrO2・グラフアイト質耐火物、
３は石灰質耐火物層を示す。1 to 5 are vertical sectional views of nozzles I to V shown in Table 3 among embodiments of the nozzle of the present invention, and FIG. 6 is a vertical sectional view showing another example of the nozzle of the present invention, In the figure, 1 is Al 2 O 3 · Graphite refractory, 2 is ZrO 2 · Graphite refractory,
3 indicates a calcareous refractory layer.
Claims (2)
００重量部にハロゲン化化合物あるいはアルカリ金属の
無機化合物または有機化合物の１種以上を０．１〜２０
重量部添加してなる石灰質耐火物の１〜１５mm厚の層
を、連続鋳造用ノズルの溶鋼吐出口内側に配設したこと
を特徴とする連続鋳造用ノズル。1. A type 1 or type 2 of limestone or dolomite 1.
0.1 to 20 parts by weight of one or more halogenated compounds or inorganic or organic compounds of alkali metals are added to 100 parts by weight.
A continuous casting nozzle, characterized in that a 1 to 15 mm thick layer of calcareous refractory made by adding parts by weight is arranged inside the molten steel discharge port of the continuous casting nozzle.
物層を同時成形し、または前記溶鋼吐出口内側を旋削加
工后に挿入、配設してなる特許請求の範囲第１項記載の
連続鋳造用ノズル。2. The method according to claim 1, wherein the calcareous refractory layer disposed inside the molten steel discharge port is formed simultaneously, or the inside of the molten steel discharge port is inserted and disposed after turning. Nozzle for continuous casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60163997A JPH0620622B2 (en) | 1985-07-26 | 1985-07-26 | Nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60163997A JPH0620622B2 (en) | 1985-07-26 | 1985-07-26 | Nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6224846A JPS6224846A (en) | 1987-02-02 |
| JPH0620622B2 true JPH0620622B2 (en) | 1994-03-23 |
Family
ID=15784795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60163997A Expired - Lifetime JPH0620622B2 (en) | 1985-07-26 | 1985-07-26 | Nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620622B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192875A (en) * | 1987-02-06 | 1988-08-10 | Electroplating Eng Of Japan Co | Production of metal coated film |
| JPH0454550U (en) * | 1990-08-31 | 1992-05-11 | ||
| EP1493516B1 (en) | 2002-04-02 | 2007-04-25 | Krosakiharima Corporation | Binding structure of refractory sleeve for inner hole of nozzle for continuous casting |
| JP5426431B2 (en) | 2009-06-30 | 2014-02-26 | 株式会社ショーワ | Hydraulic shock absorber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738366A (en) * | 1980-08-13 | 1982-03-03 | Harima Refractories Co Ltd | Manufacture of nozzle for carbon-containing limy continuous casting |
-
1985
- 1985-07-26 JP JP60163997A patent/JPH0620622B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738366A (en) * | 1980-08-13 | 1982-03-03 | Harima Refractories Co Ltd | Manufacture of nozzle for carbon-containing limy continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6224846A (en) | 1987-02-02 |
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