JPH08217533A - Stopper head - Google Patents
Stopper headInfo
- Publication number
- JPH08217533A JPH08217533A JP7053753A JP5375395A JPH08217533A JP H08217533 A JPH08217533 A JP H08217533A JP 7053753 A JP7053753 A JP 7053753A JP 5375395 A JP5375395 A JP 5375395A JP H08217533 A JPH08217533 A JP H08217533A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- zirconia
- weight
- head
- graphite
- 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
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】
【目的】 本発明のヘッドの使用により、異常溶損によ
る連鋳トラブルの防止や、ヘッド表面への付着物の生成
防止による流量制御精度の向上により、安定した多連の
鋳造を可能とする。
【構成】 アルミナ，アルミナ・ジルコニア，ムライ
ト，ジルコニアムライトのうち１種又は２種以上の配合
により、アルミナ成分が８０重量％以上でシリカ成分が
１０重量％以下の黒鉛又はカーボンを含有しないことを
特徴とするストッパーヘッド。(57) [Abstract] [Purpose] By using the head of the present invention, continuous casting trouble due to abnormal melting loss is prevented, and flow rate control accuracy is improved by preventing the formation of deposits on the head surface, which enables stable multiple Enables casting. [Composition] Alumina, alumina / zirconia, mullite, and zirconia mullite are blended in one or more kinds, and the alumina component is 80% by weight or more and the silica component is 10% by weight or less and does not contain graphite or carbon. And a stopper head.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、取鍋，タンディッシュ
に使用されるストッパーヘッドに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper head used for ladle and tundish.
【０００２】[0002]
【従来の技術】鋼の連続鋳造用のストッパーヘッドに
は、電融アルミナ，ジルコニア，スピネル等の酸化物骨
材とりん状黒鉛に有機質バインダーを添加し、ラバープ
レスで成形し還元焼成されたアルミナ―黒鉛質，ジルコ
ニア―黒鉛質やスピネル―黒鉛質の材料が使用されてい
る。2. Description of the Related Art A stopper head for continuous casting of steel is prepared by adding an organic binder to oxide aggregates such as fused alumina, zirconia, and spinel and phosphorous graphite, molding them with a rubber press, and reducing and firing the alumina. -Graphite, zirconia-graphite and spinel-graphite materials are used.
【０００３】これら従来のヘッドについて、特開平４―
１５８９６１号公報等に提案されているように黒鉛量を
１５重量％未満として酸化防止と低熱伝導化し、異常溶
損防止とメタル付着防止を図っていた。Regarding these conventional heads, Japanese Patent Laid-Open No. 4-
As proposed in Japanese Patent No. 158961, the amount of graphite is less than 15% by weight to prevent oxidation and reduce thermal conductivity to prevent abnormal melting loss and metal adhesion.
【０００４】しかしこのような材質でも約１５重量％の
黒鉛及び１０〜２０重量％程度のシリカが添加されてい
る為に、予熱時に黒鉛成分が酸化し異常溶損したり、高
酸素鋼の鋳造時に黒鉛の酸化やシリカ成分と鋼中のＦｅ
Ｏ，ＭｎＯ等の成分による低融物の生成により異常溶損
する問題を有していた。However, even with such a material, since about 15% by weight of graphite and about 10 to 20% by weight of silica are added, the graphite component is oxidized during preheating and abnormally melted, or when casting high oxygen steel. Oxidation of graphite and silica component and Fe in steel
There has been a problem that abnormal melting damage occurs due to the formation of a low melt due to components such as O and MnO.
【０００５】更には、耐熱スポーリング性向上の目的で
添加されている溶融シリカ質骨材と黒鉛もしくはバイン
ダーカーボンが反応し、ＣＯ（ｇ）ガスを発生すること
により、溶鋼の汚染になったり、溶鋼中のＡｌを酸化し
てアルミナを生成し、ヘッド表面に付着する為に、溶鋼
の流量制御性が低下したりする問題も有していた。Further, the fused siliceous aggregate added for the purpose of improving the heat-resistant spalling property reacts with graphite or binder carbon to generate CO (g) gas, resulting in contamination of molten steel. There is also a problem that the flow rate controllability of the molten steel deteriorates because Al in the molten steel is oxidized to generate alumina and adheres to the head surface.
【０００６】[0006]
【発明が解決しようとする課題】本発明では、上記に示
したように黒鉛成分にもとづく酸化による異常溶損とヘ
ッドへのアルミナ付着の問題を解決するストッパーヘッ
ドを提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a stopper head which solves the problems of abnormal melting loss due to oxidation based on a graphite component and adhesion of alumina to the head as described above.
【０００７】[0007]
【課題を解決するための手段】本発明は、アルミナ，ア
ルミナ・ジルコニア，ムライト，ジルコニアムライトの
うち１種又は２種以上のクリンカーからなり、アルミナ
含有量が８０重量％以上でかつシリカ含有量が１０重量
％未満の黒鉛又はカーボンを含有しないことを特徴とす
るストッパーヘッドを提供する。The present invention comprises a clinker of one or more of alumina, alumina-zirconia, mullite and zirconia-mullite, and has an alumina content of 80% by weight or more and a silica content of Provided is a stopper head characterized by not containing less than 10% by weight of graphite or carbon.
【０００８】[0008]
【作用】以下、本発明の詳細について説明する。The details of the present invention will be described below.
【０００９】本発明のストッパーヘッドは、黒鉛又はカ
ーボンを含有しておらず、黒鉛やカーボンの酸化による
異常溶損の問題は発生しない。Since the stopper head of the present invention does not contain graphite or carbon, the problem of abnormal erosion due to oxidation of graphite or carbon does not occur.
【００１０】又、黒鉛とシリカの還元反応も発生しない
為、溶鋼汚染やアルミナ生成付着の問題もない。Further, since the reduction reaction between graphite and silica does not occur, there is no problem of molten steel contamination or alumina formation and adhesion.
【００１１】ここでアルミナ含有量が８０重量％より少
ないと耐食性が低下する。一方、シリカが１０重量％よ
り多いとメタル中含有元素と反応して〔ＳｉＯ〕のガス
化し気液反応による界面に酸化物の付着あるいは表面粘
着に起因したＡｌ2Ｏ3の付着が生じる。If the alumina content is less than 80% by weight, the corrosion resistance is lowered. On the other hand, when the amount of silica is more than 10% by weight, it reacts with the element contained in the metal to gasify [SiO], and oxides adhere to the interface due to gas-liquid reaction or Al 2 O 3 adheres due to surface adhesion.
【００１２】又、アルミナ成分の含有量を８０重量％以
上でかつシリカ成分の含有量が、１０重量％未満にする
ことにより、鋼中のＦｅＯ，ＭｎＯの化学的な侵食にも
十分耐え得る耐食性を維持することが判明した。Further, by setting the content of the alumina component to 80% by weight or more and the content of the silica component to less than 10% by weight, the corrosion resistance which can sufficiently withstand the chemical corrosion of FeO and MnO in the steel. Turned out to maintain.
【００１３】そこで残る耐熱スポーリング特性の維持方
法であるが、本発明では低膨張のアルミナ，アルミナ・
ジルコニア，ムライト，ジルコニアムライト，クリンカ
ーの１種又は２種以上のクリンカーを使用しており、従
来のラバープレスで製造された黒鉛含有のアルミナ―黒
鉛質等と第１表に示すように同等の耐熱スポーリング特
性を有した。The method of maintaining the heat-resistant spalling characteristics that remains there is, but in the present invention, low expansion alumina, alumina.
One or more clinker of zirconia, mullite, zirconia mullite, and clinker are used, and heat resistance equivalent to that of graphite-containing alumina-graphite produced by conventional rubber press, as shown in Table 1. It had spalling properties.
【００１４】これは、アルミナジルコニアクリンカーの
中のジルコニアがクリンカー中にマイクロクラックを生
成する為、煉瓦として亀裂発生と進展が抑制するためで
ある。This is because the zirconia in the alumina zirconia clinker produces microcracks in the clinker, which suppresses the generation and progress of cracks as bricks.
【００１５】又、ムライトやジルコニア・ムライトの使
用により熱膨張係数の低下が図れる。Further, the coefficient of thermal expansion can be lowered by using mullite or zirconia mullite.
【００１６】使用される骨材は焼結品でも電融品でも良
いが高耐食性が必要な場合には、電融品が望ましい。The aggregate used may be a sintered product or an electromelted product, but if high corrosion resistance is required, the electromelted product is preferred.
【００１７】又、結合材としては粘土等が望ましいが、
リン酸塩，ケイ酸塩等の結合材も可能である。Clay or the like is desirable as the binder,
Binders such as phosphates and silicates are also possible.
【００１８】[0018]
【実施例】第１表に本発明のヘッド及び比較例として、
従来のヘッドを使用した場合の耐熱スポーリング特性，
耐食性及び表面への付着物の厚みを測定した結果を示
す。EXAMPLES Table 1 shows the head of the present invention and a comparative example.
Heat-resistant spalling characteristics when using a conventional head,
The result of having measured the corrosion resistance and the thickness of the deposit on the surface is shown.
【００１９】なお付着物厚みについては、３５０ｔ／ｃ
ｈの溶鋼を４５ｔタンディッシュで３３０分間で３ヒー
ト鋳造した際に使用したヘッドを回収調査して表面付着
物を測定したものである。The deposit thickness is 350 t / c.
The head used when the molten steel of h was cast by heat in 45 t tundish for 330 minutes for 3 minutes was collected and investigated to measure surface deposits.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】本発明のヘッドの使用により、異常溶損
による連鋳トラブルの防止や、ヘッド表面への付着物の
生成防止による流量制御精度の向上により、安定した多
連の鋳造が可能となった。EFFECTS OF THE INVENTION By using the head of the present invention, continuous casting trouble due to abnormal melting loss can be prevented, and the flow control accuracy can be improved by preventing the generation of deposits on the head surface, which enables stable multiple casting. became.
Claims (1)
イト，ジルコニアムライトのうち１種又は２種以上の配
合により、アルミナ成分が８０重量％以上でシリカ成分
が１０重量％以下の黒鉛又はカーボンを含有しないこと
を特徴とするストッパーヘッド。1. A mixture of one or more of alumina, alumina-zirconia, mullite, and zirconia-mullite does not contain graphite or carbon containing 80% by weight or more of alumina component and 10% by weight or less of silica component. Stopper head characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7053753A JPH08217533A (en) | 1995-02-20 | 1995-02-20 | Stopper head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7053753A JPH08217533A (en) | 1995-02-20 | 1995-02-20 | Stopper head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08217533A true JPH08217533A (en) | 1996-08-27 |
Family
ID=12951580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7053753A Pending JPH08217533A (en) | 1995-02-20 | 1995-02-20 | Stopper head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08217533A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015038031A (en) * | 2005-09-26 | 2015-02-26 | サン−ゴバン セントレ デ レシェルシェ エト デチュード ユーロピーン | Sintered refractory product exhibiting enhanced thermal shock resistance |
| CN107365159A (en) * | 2017-06-23 | 2017-11-21 | 鞍山市和丰耐火材料有限公司 | A kind of long production method for pouring time integral column of sagger of smelting suprelow carbon steel tundish |
-
1995
- 1995-02-20 JP JP7053753A patent/JPH08217533A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015038031A (en) * | 2005-09-26 | 2015-02-26 | サン−ゴバン セントレ デ レシェルシェ エト デチュード ユーロピーン | Sintered refractory product exhibiting enhanced thermal shock resistance |
| CN107365159A (en) * | 2017-06-23 | 2017-11-21 | 鞍山市和丰耐火材料有限公司 | A kind of long production method for pouring time integral column of sagger of smelting suprelow carbon steel tundish |
| CN107365159B (en) * | 2017-06-23 | 2020-09-08 | 鞍山市和丰耐火材料有限公司 | Production method of long-pouring-time integral stopper rod for smelting ultra-low carbon steel tundish |
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