JPH05123860A - Sliding nozzle device - Google Patents
Sliding nozzle deviceInfo
- Publication number
- JPH05123860A JPH05123860A JP31173391A JP31173391A JPH05123860A JP H05123860 A JPH05123860 A JP H05123860A JP 31173391 A JP31173391 A JP 31173391A JP 31173391 A JP31173391 A JP 31173391A JP H05123860 A JPH05123860 A JP H05123860A
- Authority
- JP
- Japan
- Prior art keywords
- sliding
- sliding nozzle
- sheet
- graphite
- nozzle
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶鋼鍋やタンディッシ
ュで通鋼量を流量制御するスライディングノズル装置に
関し、特にその摺動抵抗を低減できるスライディングノ
ズル装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding nozzle device for controlling the flow rate of steel passing through a ladle ladle or a tundish, and more particularly to a sliding nozzle device capable of reducing sliding resistance.
【０００２】[0002]
【従来の技術】スライディングノズル装置は、ノズル孔
を有する２枚または３枚のプレ−トを重ねて一定の面圧
を負荷し、ノズル孔の開度を制御できるようにしてい
る。2. Description of the Related Art In a sliding nozzle device, two or three plates each having a nozzle hole are overlapped with each other to apply a constant surface pressure so that the opening of the nozzle hole can be controlled.
【０００３】当該装置を安定して使用できる条件とし
て、特に耐火物に求められるのは、スライディングノズ
ルのノズル孔の損傷が小さいこと、スライディングノズ
ルに亀裂が大きく発生しないこと、スライディングノズ
ルの摺動面が荒れないことなどが挙げられる。そのた
め、これらについて改善することが行なわれている。特
に、前二者については、スライディングノズルの材質を
使用条件にあわせて各種変更することによって、耐用性
が改善されている。The conditions under which the apparatus can be used stably are particularly required for refractory materials: that the nozzle hole of the sliding nozzle is small in damage, that the sliding nozzle is not cracked significantly, and that the sliding surface of the sliding nozzle is not damaged. It can be said that it is not rough. Therefore, improvements are being made in these areas. Especially in the former two cases, the durability is improved by variously changing the material of the sliding nozzle according to the usage conditions.
【０００４】また、後者の摺動面の改善に関して、スラ
イディングノズルの耐火れんがの組織中に黒鉛や窒化硼
素等の潤滑性能にすぐれる材料を配合したり、耐火れん
がの中にタ−ルピッチを含浸して、使用時にそれが滲み
出すことによって潤滑性を得る等の方法が講じられてい
る。Regarding the latter improvement of the sliding surface, the structure of the refractory brick of the sliding nozzle is mixed with a material having excellent lubricating performance such as graphite or boron nitride, or the refractory brick is impregnated with a tar pitch. Then, a method of obtaining lubricity by exuding it at the time of use is taken.
【０００５】[0005]
【発明が解決しようとする課題】しかし、スライディン
グノズルのれんが組織中に黒鉛等を配合したり、タ−ル
ピッチを含浸する方法は、スライディングノズルの摺動
抵抗を低減する効果を奏するが、使用回数が多くなった
り、使用時間が長くなると、その効果は著しく低下す
る。また、特に、後者の場合、作業環境面からもあまり
好ましくない。However, the method of blending graphite or the like into the brick structure of the sliding nozzle or impregnating the tar pitch has the effect of reducing the sliding resistance of the sliding nozzle. If the amount of water is increased or the usage time is increased, the effect is significantly reduced. Further, especially in the latter case, it is not so preferable from the viewpoint of working environment.
【０００６】そこで、使用途中にスライディングノズル
の摺動面に潤滑剤を適宜塗布することも、採用されてい
る。しかし、この方法も、使用後の短時間について、効
果は認められるものの、効果を長期にわたって持続する
ことができない。Therefore, it is also adopted to appropriately apply a lubricant to the sliding surface of the sliding nozzle during use. However, even with this method, the effect is recognized for a short time after use, but the effect cannot be sustained for a long time.
【０００７】スライディングノズルの摺動抵抗が高くな
ると、スライディングノズル装置の摺動に対する駆動力
が不足して、摺動不能となる。そのため、スライディン
グノズル摺動の駆動力を過剰に設計すると、コスト面か
らも問題があるばかりでなく、使用時に摺動面に異常な
負荷が加わり、摺動面を傷つけたり、ノズル孔に付属し
た地金を摺動面に噛み込んで摺動面間から漏鋼する等の
重大な問題が発生することになる。When the sliding resistance of the sliding nozzle becomes high, the sliding nozzle device is insufficient in driving force for sliding and cannot slide. Therefore, if the sliding nozzle sliding drive force is designed excessively, not only will there be problems in terms of cost, but also an abnormal load will be applied to the sliding surface during use, causing damage to the sliding surface and attachment to the nozzle hole. If the metal is caught in the sliding surface and steel leaks from between the sliding surfaces, serious problems will occur.
【０００８】特に、スライディングノズル装置のオペレ
−タ−は、摺動抵抗の大小からスライディングノズルの
耐用限界を決定する場合があり、摺動抵抗の程度が耐用
度とできる限り正しく対応していることが望ましい。In particular, the operator of the sliding nozzle device sometimes determines the service limit of the sliding nozzle depending on the magnitude of the sliding resistance, and the degree of the sliding resistance corresponds to the serviceability as accurately as possible. Is desirable.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記のような
点に鑑みたもので、上記の課題を解決するために、溶鋼
流量制御用のスライディングノズルの摺動面に、黒鉛を
１０〜２００μｍの厚さのシ−トとして貼り付けたこと
を特徴とするスライディングノズル装置を提供すること
にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in order to solve the above-mentioned problems, graphite is added to the sliding surface of a sliding nozzle for controlling the flow rate of molten steel with 10 to 10% graphite. It is an object of the present invention to provide a sliding nozzle device characterized by being attached as a sheet having a thickness of 200 μm.
【００１０】[0010]
【作用】本発明によれば、スライディングノズルの摺動
面に貼り付けた黒鉛のシ−トによって、ノズルのプレ−
トを摺動抵抗が少なく、シ−トが摩耗するまでの長期間
にわたって円滑に駆動できる。また、スライディングノ
ズルの摺動面に黒鉛のシ−トを貼り付けるので、製造が
簡単であり、またシ−トを貼り替えることで、保守も容
易に行なえる。According to the present invention, the graphite sheet attached to the sliding surface of the sliding nozzle is used to pre-press the nozzle.
The sliding resistance of the sheet is small, and the sheet can be smoothly driven for a long period of time until the sheet is worn. Further, since the graphite sheet is attached to the sliding surface of the sliding nozzle, the production is simple, and the sheet can be replaced to facilitate maintenance.
【００１１】[0011]
【実施例】以下、本発明を実施例にもとづいて説明す
る。タンディッシュからモ−ルドへ溶鋼を流通する溶鋼
流量制御用のスライディングノズルの２枚または３枚重
ね合わせたプレ−トの摺動面に、黒鉛を１０〜２００μ
ｍの厚さのシ−ト状としてそれぞれ貼り付け、スライデ
ィングノズルの摺動抵抗を低減するものである。EXAMPLES The present invention will now be described based on examples. 10 to 200 μ of graphite is applied to the sliding surface of a plate in which two or three sliding nozzles for controlling the molten steel flow rate for flowing molten steel from the tundish to the mold are superposed.
The sheet is attached in the form of a sheet having a thickness of m to reduce the sliding resistance of the sliding nozzle.
【００１２】このシ−トの厚みは、スライディングノズ
ルの摺動プレ−トに貼り付ける際の強度、作業性、使用
時間から最低１０μｍは必要であるが、２００μｍ以上
に厚くすると、溶鋼接触部の溶損等によって地金を噛み
込むことがあり、実用上好ましくない。The thickness of this sheet is required to be at least 10 μm from the viewpoint of strength, workability, and working time when it is attached to the sliding plate of the sliding nozzle. The metal may be caught due to melting damage or the like, which is not preferable in practical use.
【００１３】黒鉛のシ−トは、鱗状黒鉛粒子をフェノ−
ルレジン、シリコ−ンレジン、エポキシレジン等の有機
バインダ−や、燐酸塩、珪酸ソ−ダ、硼珪酸ソ−ダ等の
無機バインダ−を用いて混合し、これを圧縮成形もしく
はロ−ル成形で所定の厚さとすることができる。黒鉛粒
子の粒径としては、２０μｍ以下ではシ−ト成形体中の
鱗状黒鉛の配向性が十分でなく、潤滑性が低下し、７４
μｍ以上のものを圧縮成形もしくはロ−ル成形して、配
向性よく平坦状とするのが好ましい。The graphite sheet is a graphite sheet containing scaly graphite particles.
Organic binders such as resin, silicone resin, epoxy resin, and inorganic binders such as phosphate, soda silicate, borosilicate soda are mixed, and the mixture is subjected to compression molding or roll molding. Can be of thickness. If the particle size of the graphite particles is 20 μm or less, the orientation of the scaly graphite in the sheet molding is not sufficient, and the lubricity is deteriorated.
It is preferable that the particles having a size of μm or more are compression-molded or roll-molded to have a flat shape with good orientation.
【００１４】[0014]
【使用例】３０μｍ以上の粒径の鱗状黒鉛１００重量部
に対してシリコ−ン樹脂を１０重量％添加して混練し、
ロ−ル成形機により２０μｍ厚さのシ−トに成形した。
そして、シ−トを２００℃で２時間加熱処理した。[Example of use] 10 parts by weight of a silicone resin was added to 100 parts by weight of scaly graphite having a particle size of 30 μm or more and kneaded,
It was molded into a sheet having a thickness of 20 μm by a roll molding machine.
Then, the sheet was heat-treated at 200 ° C. for 2 hours.
【００１５】上記シ−トをアルミナ−カ−ボン系のスラ
イディングノズルの予めシリコ−ン樹脂を塗布したプレ
−トの摺動面に全面にわたって貼り付け、２００℃で５
時間加熱処理した。The above sheet was adhered over the entire sliding surface of the plate of the alumina-carbon type sliding nozzle, which was previously coated with silicone resin, at 200 ° C. for 5 hours.
Heat treated for hours.
【００１６】本発明品を１５０トン溶鋼鍋で、従来品と
同様の条件で使用した。その結果、本発明品は、１０回
繰り返し使用しても、摺動抵抗が初期抵抗に比べて５％
程度しか高くならず、使用後の面荒れも極めて少なかっ
た。従来品では、７チャ−ジで摺動抵抗が使用限界値を
越えて使用停止しなければならず、また使用後の面荒れ
状態も凹凸が多く認められていた。したがって、本発明
品は、上記の通り格段の向上がはかれた。The product of the present invention was used in a 150 ton ladle under the same conditions as the conventional product. As a result, even if the product of the present invention is repeatedly used 10 times, the sliding resistance is 5% compared to the initial resistance.
It was only high and the surface roughness after use was extremely low. In the conventional product, the sliding resistance had to exceed the use limit value in 7 charges and the product had to be stopped, and many surface irregularities were observed after use. Therefore, the product of the present invention was remarkably improved as described above.
【００１７】なお、本発明品では、従来品に対して摺動
抵抗が約５分の１〜１０分の１に低下し、また従来品で
は使用時間が経過すると摺動面の摩耗で凹凸が生じて摺
動抵抗が急速に高まるが、本発明では黒鉛のシ−トが消
失しない限り潤滑性能を維持でき、摺動抵抗もその間ほ
とんど変化なく、スライディングノズルを円滑に操作す
ることができる。In the product of the present invention, the sliding resistance is reduced to about 1/5 to 1/10 of that of the conventional product, and in the conventional product, the sliding surface is worn and uneven due to wear on the sliding surface after the usage time. Although the sliding resistance is rapidly increased due to the occurrence, the present invention can maintain the lubricating performance as long as the graphite sheet is not lost, and the sliding resistance hardly changes during that time, and the sliding nozzle can be operated smoothly.
【００１８】上記では、タンディッシュ用のスライディ
ングノズル装置について説明したが、溶鋼鍋用のものに
ついても同様に適用できるものである。Although the sliding nozzle device for the tundish has been described above, it can be similarly applied to the one for the molten steel ladle.
【００１９】[0019]
【発明の効果】以上のように本発明にあっては、スライ
ディングノズルを摺動抵抗が少なく、黒鉛のシ−トが摩
耗するまで長期間にわたって円滑に使用できる。そのた
め、スライディングノズルの駆動力も小さくできて装置
のコトスダウンがはかれるとともに、黒鉛のシ−トを貼
り替えることで摺動面の保守も容易に行なえるなど優れ
た効果を奏する。As described above, according to the present invention, the sliding nozzle has a small sliding resistance and can be smoothly used for a long period until the graphite sheet is worn. Therefore, the driving force of the sliding nozzle can be reduced, the cost of the device can be reduced, and the sliding face can be easily maintained by replacing the graphite sheet.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小口 征男 兵庫県赤穂市中広字東沖1576番地の２ 川 崎炉材株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Oguchi 2 Kawasaki Furnace Co., Ltd. 2 at 1576, Higashi-oki, Nakahiro, Ako City, Hyogo Prefecture
Claims (1)
の摺動面に、黒鉛を１０〜２００μｍの厚さのシ−トと
して貼り付けたことを特徴とするスライディングノズル
装置。1. A sliding nozzle device in which graphite is adhered to a sliding surface of a sliding nozzle for controlling the flow rate of molten steel as a sheet having a thickness of 10 to 200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31173391A JPH05123860A (en) | 1991-10-29 | 1991-10-29 | Sliding nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31173391A JPH05123860A (en) | 1991-10-29 | 1991-10-29 | Sliding nozzle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05123860A true JPH05123860A (en) | 1993-05-21 |
Family
ID=18020822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31173391A Pending JPH05123860A (en) | 1991-10-29 | 1991-10-29 | Sliding nozzle device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05123860A (en) |
-
1991
- 1991-10-29 JP JP31173391A patent/JPH05123860A/en active Pending
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