JPS606256A - Nozzle for casting - Google Patents
Nozzle for castingInfo
- Publication number
- JPS606256A JPS606256A JP11402383A JP11402383A JPS606256A JP S606256 A JPS606256 A JP S606256A JP 11402383 A JP11402383 A JP 11402383A JP 11402383 A JP11402383 A JP 11402383A JP S606256 A JPS606256 A JP S606256A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- corrosion
- refractory material
- protective layer
- slag line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B22D41/505—Rings, inserts or other means preventing external nozzle erosion by the slag
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は鋼連続鋳造用ノズル、特に取鍋用浸漬ノズルあ
るいはロングノズルに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle for continuous steel casting, particularly a submerged nozzle for ladle or a long nozzle.
従来力)ら、浸漬ノズルやロングノズルは鋼の連続鋳造
用として溶融面実質やアルミナ−黒鉛質のもの等が使わ
れている。このうち溶融面実質のものは耐スポーリング
性にすぐれているが、特に高廁鋼には耐蝕性が劣り、溶
鋼流出時間が1時間奮起える工うな場合にはほとんど使
用に耐えな刀1つた。高胤鋼に使用した場合には、特に
スラグライン及び吐出口附近が浸蝕全受は易く、従って
高Mn鋼の場合には高師なアルミナ−黒鉛質のものケ使
用せざる全得ない。Conventionally, submerged nozzles and long nozzles are used for continuous casting of steel, such as those made of melting surface or alumina-graphite. Of these, those with a solid molten surface have excellent spalling resistance, but high-strength steel in particular has poor corrosion resistance, and is hardly usable in cases where the molten steel flows out for an hour. . When used for high-grade steel, corrosion is likely to occur particularly in the vicinity of the slag line and discharge port, so in the case of high-Mn steel, a high quality alumina-graphite material must be used.
本発明は溶融石英質ノズルの特長を生刀為しつつ、その
欠点である耐蝕性の改善?討つπもので、スラグライン
部及び/又は吐出口部に無機繊維ケ含む不定形耐火物に
よって保護層?形成したものである。The present invention takes advantage of the features of fused silica nozzles while improving its corrosion resistance, which is its drawback. Is there a protective layer made of monolithic refractory material containing inorganic fibers in the slag line and/or discharge port? It was formed.
浸漬ノズルあるいはロングノズルにおいて、スラグライ
ン部の耐蝕性を改善するために高耐蝕性耐火物果アウタ
ーリング?嵌合することは、例えば実公昭46−262
41号にもあるように従来刀翫ら知られているが、従来
のアウターリングはスラグライン部に別途成形焼成した
高耐蝕性耐火物全モルタル等?使用して嵌合するもので
あるため、例えば溶融石英質本体に嵌合した場合、本体
の熱膨張とアウターリングの熱膨張が異なるため容易に
剥落奮起し易く実用に耐えない。従ってアウターリング
?固着せず浮遊状態で使用することも考えられたが、ノ
ズル本体とアウターリングの間隙にスラグパウダーが浸
入し結局浸蝕抑制の効果が得られない等の問題があった
。Highly corrosion-resistant refractory outer ring to improve corrosion resistance of slag line in immersion nozzle or long nozzle? For example, mating is defined in Japanese Utility Model Publication No. 46-262.
As stated in No. 41, the conventional outer ring is made of highly corrosion-resistant refractory mortar that is separately molded and fired at the slag line. Since it is used and fitted, for example, when it is fitted to a fused silica main body, the thermal expansion of the main body is different from that of the outer ring, so it easily peels off and is not suitable for practical use. So the outer ring? Although it was considered to use the nozzle in a floating state without being fixed, there were problems such as slag powder entering the gap between the nozzle body and the outer ring, resulting in no corrosion suppression effect.
本発明は浴融シリカ質の浸漬ノズルあるいはロングノズ
ル?使用する場会に、そのスラグライン部及び/又は吐
出口部の耐蝕性全向上するために無機繊維會配仔した不
定形耐火物によって保護するもので、その結果、熱膨張
によって剥落することもなく不定形耐火物自身の保有す
る耐蝕性の効果を充分に発揮せしめることができ、もっ
て溶融石英質のもつ特長?更に向上させり浸漬ノズルあ
るいはロングノズル?得ることができる。Is the present invention a bath-fused siliceous immersion nozzle or a long nozzle? When used, the slag line and/or discharge port are protected by monolithic refractories coated with inorganic fibers in order to improve their corrosion resistance, and as a result, they do not peel off due to thermal expansion. The corrosion resistance of the monolithic refractory itself can be fully demonstrated without any problems, and the characteristics of the fused silica material can be fully demonstrated. Further improvement: immersion nozzle or long nozzle? Obtainable.
以下に本発明の一実施例?図によって説明する。Below is an example of the present invention? This will be explained using figures.
第1図は溶融石英質ロングノズル本体1のスラグライン
部2に対応する部分に無機繊維を配合した不定形耐火物
力λらなるアウターリング3を構成せしめたもの、第2
図は第1図のものに更にその吐出口部4の円面に同材質
からなる不定形耐火物製インナーリング5會構成せしめ
たものである。FIG. 1 shows a fused silica long nozzle body 1 in which an outer ring 3 made of an amorphous refractory material λ containing inorganic fibers is constructed in a portion corresponding to the slag line portion 2;
The figure shows an inner ring 5 made of a monolithic refractory made of the same material on the circular surface of the discharge port 4 in addition to the one shown in FIG. 1.
この無機繊維ケ配合した不定形耐火物の組成は、先ず無
機繊維としては石綿あるいはセラミックファイバー等を
使用し、これ?5〜15重量%配合する。主成分?構成
する不定形耐火材はマグネシア、ジルコニア、アルミナ
等の耐熱。The composition of this monolithic refractory containing inorganic fibers is asbestos, ceramic fiber, etc. used as the inorganic fiber. It is blended in an amount of 5 to 15% by weight. Main ingredient? The constituent monolithic refractory materials are heat-resistant materials such as magnesia, zirconia, and alumina.
耐蝕性のある耐火材?使用し、これらが骨材、微粉等と
して70〜90重量%含まれるように調合し、これに例
えばプライオーフェン、アルミナセメント等の結合材を
配合する。無機繊維が均一に分散できるように適宜の有
機系分散側音使用することもできる。Corrosion-resistant fireproof material? These materials are used as aggregates, fine powders, etc. in a proportion of 70 to 90% by weight, and a binder such as plyophen or alumina cement is added thereto. Appropriate organic dispersion sidetones can also be used to uniformly disperse the inorganic fibers.
得られた不定形耐火物材料はあら刀1じめ成形焼成され
た溶融石英質ロングノズルのスラグライン部及び/又は
吐出口部に金型等を使用しであるいは他の任意の方法に
よって固着せしめる。The obtained monolithic refractory material is fixed to the slag line portion and/or discharge port portion of a fused silica long nozzle that has been preformed and fired using a mold or by any other method. .
これy150C程度に加熱乾燥することに工って成形品
とすることができる。This can be made into a molded product by heating and drying it to about y150C.
この実施例において得られた不定形耐火物部分の配分表
と化学成分及び物性?示すと次の表の通りであった。Distribution table, chemical composition and physical properties of the monolithic refractory part obtained in this example? The results are shown in the table below.
主成分としてのマグネシア、アルミナ、ジルコニア等の
骨材は耐熱、耐蝕性會保持するため(5)
に使用されるが、その配合割分は70〜90重量%であ
ることが好ましく、700重量%以下は不定形耐火物と
しての強度が期待できない。Aggregates such as magnesia, alumina, and zirconia as the main components are used for maintaining heat resistance and corrosion resistance (5), and the blending proportion thereof is preferably 70 to 90% by weight, and 700% by weight. The following cannot be expected to have the strength as a monolithic refractory.
又、無機繊維は主成分粒子に対し断熱性強度向上ば刀・
りでなく、成形体としての熱膨張?制御するために効果
があり、不定形耐火物として使用した場会、溶融石英質
ノズルの特性の一つである低熱膨張性(1000Cにお
ける線膨張率0.05%)に対し好ましい働き全発揮す
る。その配合割分は5〜15重量%が好適で、5重量%
以下では上述のような効果が発揮できず、又15重量%
以上では耐蝕性が低下する。In addition, inorganic fibers can be used to improve insulation strength compared to the main component particles.
Is it thermal expansion as a molded object? When used as a monolithic refractory, it fully exerts its favorable effect on low thermal expansion (coefficient of linear expansion 0.05% at 1000C), which is one of the characteristics of fused silica nozzles. . The blending proportion is preferably 5 to 15% by weight, and 5% by weight.
Below 15% by weight, the above-mentioned effect cannot be achieved.
If it is more than that, the corrosion resistance will decrease.
前記実施例におけるノズルkMn含有率1%の高凧鋼の
タンディツシュ用ロングノズルとして鋳込みに使用した
結果、保護層會有しないものが40分の使用で剥落した
のに対し、60分使用してもなおスラグラインにおいて
保護層の厚みが半減して5賂の肉厚で残存していた。As a result of using the nozzle in the above example as a long nozzle for a tundish of high-kite steel with a kMn content of 1% for casting, the nozzle without a protective layer peeled off after 40 minutes of use, but slag still remained after 60 minutes of use. At the line, the thickness of the protective layer was reduced by half and remained at a thickness of 5 mm.
又本発明の保護層はスラグパウダーに対してのみでなく
溶鋼によって侵蝕を受けやすい溶鋼(6)
吐出口部に内張したものも有効に機能する。Furthermore, the protective layer of the present invention functions effectively not only against slag powder but also when lined at the discharge port of molten steel (6), which is susceptible to corrosion by molten steel.
本発明は従来の予め焼成したアウターリングとは異なρ
、不焼成体であるため施工が芥易で刀・つ俗融石実質ノ
ズル本体に一体的に装着でき、しかも熱膨張2強度、耐
蝕性に何ら不都合が生ぜず、溶融石英質の持つ耐スポー
リング性等のすぐれ?C機能全有効に発揮できる効果會
有するものである。The present invention has a different ρ than the conventional pre-fired outer ring.
Since it is an unfired material, construction is easy and it can be attached integrally to the nozzle body of the sword/common fused stone.Moreover, there is no problem with thermal expansion 2 strength, corrosion resistance, and the corrosion resistance of fused silica. Excellent polling performance, etc.? It has the effect of fully demonstrating C functions effectively.
第1図及び第2図は本発明の実施例?示す概略縦断面図
である。
1・・・溶融石英質ロングノズル本体 2・・・スラグ
ライン部 3・・・アウターリング 4・・・吐出口部
5・・・インナーリング
発明者 西尾日計
発明者 向山賢−
発明者 伊藤和男
出願 人 東芝セラミックス株式会社
第1図 第2図Are Figures 1 and 2 examples of the present invention? FIG. 1...Fused silica long nozzle body 2...Slag line part 3...Outer ring 4...Discharge port part 5...Inner ring Inventor Nishio Nikkei Inventor Ken Mukaiyama Inventor Kazuo Ito Applicant Toshiba Ceramics Co., Ltd. Figure 1 Figure 2
Claims (1)
周及び又は吐出口部内周に、7マグネシア、ジルコニア
、及びアルミナの一種又は二種以上70為らなる耐火材
70〜90重量%と、無機繊維5〜15重量%及び結合
材とt含む不定形耐火物で保護層全形成してなる鋳造用
ノズル。70 to 90% by weight of a refractory material consisting of one or more of 7 magnesia, zirconia, and alumina, and inorganic fibers on the main body portion consisting of the melted surface substance, on the outer periphery of the slag line portion and/or the inner periphery of the discharge port portion. A casting nozzle in which the entire protective layer is formed of a monolithic refractory material containing 5 to 15% by weight and a binder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11402383A JPS606256A (en) | 1983-06-24 | 1983-06-24 | Nozzle for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11402383A JPS606256A (en) | 1983-06-24 | 1983-06-24 | Nozzle for casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS606256A true JPS606256A (en) | 1985-01-12 |
Family
ID=14627102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11402383A Pending JPS606256A (en) | 1983-06-24 | 1983-06-24 | Nozzle for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS606256A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
-
1983
- 1983-06-24 JP JP11402383A patent/JPS606256A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
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