JPH0675766B2 - Air leak prevention method for refractories for slide gates - Google Patents
Air leak prevention method for refractories for slide gatesInfo
- Publication number
- JPH0675766B2 JPH0675766B2 JP2159871A JP15987190A JPH0675766B2 JP H0675766 B2 JPH0675766 B2 JP H0675766B2 JP 2159871 A JP2159871 A JP 2159871A JP 15987190 A JP15987190 A JP 15987190A JP H0675766 B2 JPH0675766 B2 JP H0675766B2
- Authority
- JP
- Japan
- Prior art keywords
- air leak
- refractories
- prevention method
- brick
- leak prevention
- 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 - Fee Related
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はスライドゲート（S.G）のスライドプレートダ
ボ部又はノズルに発生した亀裂からのエアーリークを防
止する方法に関する。TECHNICAL FIELD The present invention relates to a method for preventing air leakage from a crack generated in a slide plate dowel portion or a nozzle of a slide gate (SG).
従来S.G装置のプレートれんが及びノズルれんがはそれ
らの外周面を鉄皮巻き構造とし、これられんがの熱膨張
を拘束し亀裂の発生の抑制と拡大を防止する手段が行わ
れている。特に、プレートれんがではノズル孔周りのダ
ボ部（凸部）は大気に接し触易い構造となっており、亀
裂拡大防止対策として該ダボ部外周面に鉄製キャップを
かぶせる等の手段が行われている。Conventionally, a plate brick and a nozzle brick of an SG device have a structure in which their outer peripheral surfaces are wrapped with a steel skin, and means for restraining the thermal expansion of the brick and suppressing the occurrence of cracks and preventing their expansion are taken. In particular, the plate brick has a structure in which the dowel (convex) around the nozzle hole is in contact with the atmosphere and is easy to touch. As a measure for preventing crack expansion, a means such as covering the outer surface of the dowel with an iron cap is used. .
溶鋼流通孔内に空気が侵入すると、溶鋼と反応してFe及
びMn等の酸化物を生成し、これらの酸化物はれんが骨材
中のアルミナやムライトと反応して低融点化合物を生成
し、結果としてれんがを溶損することが知られている。
また、カーボン含有れんがではカーボンを酸化させるた
めに、れんがの組織及び強度を劣化させ損傷が増大する
ものであり、更に製品鋼塊中に非金属介在物を含有する
ことになり、鋼塊品質にも悪影響があることも知られて
いる。When air enters the molten steel flow holes, it reacts with molten steel to form oxides such as Fe and Mn, and these oxides react with alumina and mullite in the brick aggregate to form a low melting point compound, As a result, it is known to melt bricks.
In addition, since carbon-containing bricks oxidize carbon, the structure and strength of the bricks are deteriorated and damage is increased.In addition, non-metallic inclusions are contained in the product steel ingot, which leads to the ingot quality. Are also known to have adverse effects.
また、これら従来方式では次のような諸欠陥があること
も知られている： （１）使用する鉄皮とれんがの寸法的バラツキによって
拘束力のバラツキや偏荷重の原因となり、また、多数回
の使用によって鉄皮や前記キャップのずれが発生し、所
期の効果が不充分となる。It is also known that these conventional methods have various defects as follows: (1) Due to the dimensional variation of the iron skin and the bricks used, the variation of the restraining force and the eccentric load are caused, and many times When used, the iron skin and the cap are displaced, and the desired effect becomes insufficient.
（２）特に前記ダボ部のつけねは「Ｒ」をとった形状と
してあり、キャップと密着性が不安定となり易い。(2) In particular, the fitting of the dowel portion has a shape of "R", and the adhesiveness with the cap is likely to be unstable.
（３）前記キャップの使用はその製作コスト及びダボ部
へのセットに要するコストが高いものとなる。(3) The use of the cap increases the manufacturing cost and the cost required for setting the cap on the dowel part.
本発明者等は前述のような従来方式の諸欠点を改善する
ため、種々検討、実験の結果本発明のエアーリーク防止
方法を開発したものであり、本発明の技術的構成は前記
特許請求の範囲に明記したとおり、S.Gのプレートれん
が又はノズルれんがの外周面に、S.Gの使用温度におい
て軟化し、これられんが本体から空気の侵入は勿論、亀
裂が発生しても、これら亀裂を密封する作用を有する、
エアーリーク防止用塗布剤を塗布することによりエアー
リークを防止するものである。The present inventors have developed an air leak prevention method of the present invention as a result of various studies and experiments in order to improve various drawbacks of the above-mentioned conventional methods, and the technical configuration of the present invention has the technical features of the above claims. As specified in the scope, the SG plate brick or nozzle brick is softened at the SG operating temperature on the outer peripheral surface of the SG brick, and even if air is intruded from the brick body, even if cracks occur, it has the function of sealing these cracks. Have,
By applying an air leak preventing coating agent, air leak is prevented.
S.Gの溶鋼流通孔を流下する溶鋼温度は通常1550〜1600
℃であり、S.G装置の金属ケース又はれんがのクッショ
ン材や鉄皮で被覆されていない露出部、例えばダボ部外
面温度は500〜1000℃である（ダボ部の厚みや材質によ
って外面温度域に差がある）。The molten steel temperature flowing down the SG molten steel flow hole is usually 1550 to 1600.
The temperature of the SG device is not covered by the metal case or brick cushion material or iron skin of the SG device, for example, the outer surface temperature of the dowel part is 500 to 1000 ° C. There is).
従って、本発明に用いるエアーリーク防止用塗布剤は30
0〜800℃で軟化する性質を有する組成物が用いられ、そ
れらの代表例を第１表に記載する： 尚、S.Gは使用に当り通常プレートれんがが半絞り状態
で使用される。この場合溶鋼流は流通孔内を偏って流下
し、その際に該流通孔のプレート絞り部下方に負圧（0.
5気圧程度）域が生じ、この負圧の発生によって亀裂等
から大気を吸引することになるが、本発明方法のように
軟化状態の塗布剤を塗布しておくことによって、大気の
吸引を防止することができる。Therefore, the coating agent for preventing air leak used in the present invention is 30
Compositions having the property of softening at 0 to 800 ° C. were used, representative examples of which are listed in Table 1: In addition, SG is normally used with the plate brick half-drawn. In this case, the molten steel flow is biased downward in the flow hole, and at that time, a negative pressure (0.
(Atmospheric pressure of about 5 atm) occurs, and this negative pressure causes the air to be sucked from cracks and the like, but by applying a softening agent as in the method of the present invention, the suction of the air is prevented. can do.
プレートれんがダボ部又はノズルの外周面に本発明方法
を適用するが、その具体例を第１図及び第２図に例示す
る。The method of the present invention is applied to the outer peripheral surface of the plate brick dowel portion or the nozzle, and specific examples thereof are illustrated in FIGS. 1 and 2.
第１図は本発明を２層式S.G装置に適用した例の縦断面
図であり、S.Gは公知の機構であり、スライドプレート
（１）のダボ部（１′）の外周面で、露出部に塗布剤
（10）を塗布した例である。FIG. 1 is a vertical cross-sectional view of an example in which the present invention is applied to a two-layer SG device. SG is a known mechanism, and the exposed portion is the outer peripheral surface of the dowel part (1 ′) of the slide plate (1). This is an example in which the coating agent (10) is applied to.
同様に、第２図は３層式S.G装置に適用した例を示す縦
断面図であり、このS.Gではシールプレート（２）のダ
ボ部（２′）外周面とシュートノズル（３）の下部外周
面に塗布剤（10）を塗布した例である。Similarly, FIG. 2 is a longitudinal sectional view showing an example applied to a three-layer SG device. In this SG, the outer peripheral surface of the dowel portion (2 ′) of the seal plate (2) and the lower outer periphery of the chute nozzle (3) are shown. This is an example of applying the coating agent (10) on the surface.
尚、前記外周面とはS.G装置の各支持部材やクッション
材等により密封されていない、大気に露出している外周
面を言う。The outer peripheral surface refers to the outer peripheral surface exposed to the atmosphere, which is not sealed by the supporting members of the SG device, the cushion material, or the like.
実施例 第１表塗布剤Ｃを第１図及び第２図の如く施したS.G装
置によって溶鋼の注入を行ったところ、亀裂からのエア
ーリークが認められず、従来方式では１チャージで亀裂
からのエアーリークによる局部的な損傷が発生しこれら
れんがを交換していたが、３チャージの使用が可能であ
り、S.G用れんがの使用寿命を大幅に延命することがで
き、製品鋼品質にも何らの悪影響を与えないことが認め
られた。Example 1 When the molten steel was injected by the SG device in which the coating agent C was applied as shown in FIGS. 1 and 2, no air leak from the crack was observed, and in the conventional method, it was generated from the crack with one charge. I had to replace bricks due to local damage caused by air leaks, but I was able to use 3 charges, which greatly extended the service life of SG bricks, and did not affect the quality of the product steel. It was confirmed that there was no adverse effect.
（１）S.Gれんがからのエアーリークを完全に防止でき
る。(1) Air leaks from SG bricks can be completely prevented.
（２）施工が簡単であり、施工費も安価である。(2) The construction is simple and the construction cost is low.
（３）塗布剤組成も容易に入手し得る成分の混合物であ
る。(3) The coating composition is also a mixture of readily available components.
（４）S.Gれんがの寿命が大幅に延命できる。(4) The life of S.G bricks can be greatly extended.
（５）製品鋼品質に影響を及ぼさず、均一品質の製品が
得られる。(5) A product of uniform quality can be obtained without affecting the quality of the product steel.
第１図は本発明エアーリーク防止方法を２層式S.Gに適
用した縦断面図、第２図は３層式S.Gに適用した縦断面
図であり、図中： １……スライドプレート、１′……ダボ部、２……シー
ルプレート、２′……ダボ部、３……シュートノズル、
10……塗布剤。FIG. 1 is a vertical sectional view in which the air leak prevention method of the present invention is applied to a two-layer SG, and FIG. 2 is a vertical sectional view in which a three-layer SG is applied. ...... Dowel part, 2 ... Seal plate, 2 '... Dowel part, 3 ... Shoot nozzle,
10 …… Coating agent
Claims (1)
はノズルれんがの外周面に、軟化温度が300〜800℃のエ
アーリーク防止用塗布剤を塗布することを特徴とする、
スライドゲート用耐火物のエアーリーク防止方法。1. An air leak preventing coating material having a softening temperature of 300 to 800 ° C. is applied to the outer peripheral surface of a plate brick dowel portion or a nozzle brick of a slide gate.
Air leak prevention method for refractories for slide gates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2159871A JPH0675766B2 (en) | 1990-06-20 | 1990-06-20 | Air leak prevention method for refractories for slide gates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2159871A JPH0675766B2 (en) | 1990-06-20 | 1990-06-20 | Air leak prevention method for refractories for slide gates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452072A JPH0452072A (en) | 1992-02-20 |
| JPH0675766B2 true JPH0675766B2 (en) | 1994-09-28 |
Family
ID=15703030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2159871A Expired - Fee Related JPH0675766B2 (en) | 1990-06-20 | 1990-06-20 | Air leak prevention method for refractories for slide gates |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675766B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010023057A (en) * | 2008-07-16 | 2010-02-04 | Jfe Refractories Corp | Refractory for molten metal nozzle and method for preventing suction of air from crack part thereof |
| JP5321317B2 (en) | 2009-07-24 | 2013-10-23 | ヤマハ株式会社 | Acoustic system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51137706A (en) * | 1975-05-26 | 1976-11-27 | Kurosaki Refractories Co | Two layer processing plate brick for sliding nozzle |
| JP3007379B2 (en) * | 1990-05-17 | 2000-02-07 | 東芝セラミックス株式会社 | Sliding nozzle sealing device |
-
1990
- 1990-06-20 JP JP2159871A patent/JPH0675766B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0452072A (en) | 1992-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |