JP2952132B2 - Framed steel and refractories reinforced with this framed steel - Google Patents
Framed steel and refractories reinforced with this framed steelInfo
- Publication number
- JP2952132B2 JP2952132B2 JP12953393A JP12953393A JP2952132B2 JP 2952132 B2 JP2952132 B2 JP 2952132B2 JP 12953393 A JP12953393 A JP 12953393A JP 12953393 A JP12953393 A JP 12953393A JP 2952132 B2 JP2952132 B2 JP 2952132B2
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- frame
- corner portion
- curvature
- shaped steel
- 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
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、プレ−ト耐火物など
の外周に巻装される枠状鉄皮およびこの枠状鉄皮で補強
された耐火物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame-shaped steel sheath wound around an outer periphery of a plate refractory and the like, and a refractory reinforced with the frame-shaped steel sheath.
【０００２】[0002]
【従来の技術】タンディッシュや取鍋などの溶融金属の
排出装置で用いられるスライディングノズルのプレ−
ト、下部ノズルレンガなどの耐火物は、溶融金属の激し
い熱応力で亀裂が発生しやすく早期の破損を生じる。そ
の防止対策として、これらの耐火物の外周に金属の枠状
鉄皮を巻装して拘束することが広く行われている。2. Description of the Related Art A sliding nozzle press used in a device for discharging molten metal such as a tundish or a ladle.
Refractory materials such as bricks and lower nozzle bricks are prone to cracks due to severe thermal stress of the molten metal, causing early damage. As a countermeasure, it is widely practiced to wind a metal frame-shaped steel shell around the outer periphery of these refractories and restrain them.
【０００３】この方法として、薄鉄板を加熱しながらこ
れに引っ張り力を与え、この状態でこれを耐火物の外周
に巻き付け、その締め付け端を溶接して枠状鉄皮を形成
するものが公知である（特公昭５８−４８８３５号公
報）。この方法は確かに耐火物を周囲から均一に締付け
るものであるが、より大きな締付け力を得るためには、
耐火物外周面と適応する所定の締め代を有する厚さ３mm
以上の枠状鉄皮を加熱膨脹させ、前記耐火物外周に嵌め
合わせたのち冷却する焼き嵌め法が有効である。特公平
３−６９６１０号公報はこの焼き嵌め法を提案したもの
である。これによると予めル−プに形成された枠状鉄皮
の内外側に金型を配し、この金型を外方へ駆動して枠帯
状鉄皮を引き伸ばし塑性加工するものである。[0003] As this method, there is known a method in which a thin iron sheet is heated and a tensile force is applied thereto, and in this state, the sheet is wound around the outer periphery of a refractory and its fastening end is welded to form a frame-shaped iron shell. (JP-B-58-48835). Although this method certainly tightens the refractory uniformly from the surroundings, in order to obtain a larger tightening force,
3mm thick with a specified interference that matches the outer surface of the refractory
It is effective to use a shrink fitting method in which the above-mentioned frame-shaped steel is heated and expanded, fitted to the outer periphery of the refractory, and then cooled. Japanese Patent Publication No. 3-69610 proposes this shrink fitting method. According to this method, a metal mold is arranged inside and outside a frame-shaped steel shell formed in a loop in advance, and the metal mold is driven outward to stretch the frame-shaped steel shell to perform plastic working.
【０００４】しかし、この方法によって枠状鉄皮を製造
すると、加工前の形状がル−プ状であるために、これを
嵌挿する耐火物の形状に塑性加工しようとして引き伸ば
しても、耐火物の直線部分に相当する部分は真っすぐな
直線とはならず、僅かに外側にわん曲することは避けら
れない。However, when a frame-shaped iron skin is manufactured by this method, the shape before processing is loop-shaped. The portion corresponding to the straight line portion is not a straight line, and it is unavoidable to bend slightly outward.
【０００５】従って、こうした状態に塑性加工された枠
状鉄皮に耐火物の焼き嵌めを行うと、耐火物のコ−ナ−
部では枠状鉄皮に密着するが、その直線部分では密着し
なくなる。枠状鉄皮を加熱膨脹させて焼き嵌めする際
も、コ−ナ−部で枠状鉄皮の冷却、収縮による圧縮応力
を受ける。こうした圧縮応力を受けると、通常の耐火物
はこれに抗しきれずコ−ナ−部が欠けることが多い。こ
れを避けるために焼き嵌め代を小さくすることも行われ
ているが、この方法は焼き嵌めの本来的な目的からして
好ましくなかった。Therefore, when a refractory is shrink-fitted into a frame-shaped steel shell plastically worked in such a state, a corner of the refractory is formed.
At the part, it comes into close contact with the frame-shaped iron, but at the straight part, it does not come into close contact. Even when the frame-shaped steel is heated and expanded and shrink-fitted, a compressive stress due to cooling and shrinkage of the frame-shaped steel is applied at the corner. When subjected to such compressive stress, ordinary refractories cannot withstand this and often lack corner portions. In order to avoid this, the shrink fitting allowance is reduced, but this method is not preferable from the original purpose of shrink fitting.
【０００６】こうした枠状鉄皮が外周に巻装されたプレ
−ト耐火物は、また実機での使用でも耐火物が膨脹する
時の応力がコ−ナ−部に集中することになり、プレ−ト
耐火物の中央部に設けられた孔径部とこのコ−ナ−部を
結ぶ箇所に亀裂が入りやすかった。こうした亀裂が入る
と、ここを通して空気が侵入し、溶鋼の酸化発熱反応を
引起こし、この周囲の耐火物を溶損して漏鋼事故を引起
こす恐れをが生じていた。これをさらに図示して説明す
ると次の通りである。[0006] In the case of a plate refractory having such a frame-shaped iron shell wound around the outer periphery, even when the refractory is expanded in an actual machine, the stress when the refractory expands is concentrated on the corner. -A crack was easily formed in a portion connecting the hole diameter portion provided in the center portion of the refractory with the corner portion. When such cracks enter, air enters through the cracks, causing an oxidative exothermic reaction of the molten steel, causing the surrounding refractories to be melted and causing a steel leak accident. This is further illustrated and described as follows.
【０００７】図３は従来の枠状鉄皮が巻装されたプレ−
ト耐火物の正面を示す説明図である。図３で１は枠状鉄
皮、２はプレ−ト耐火物、３はプレ−ト耐火物２に穿設
された孔である。図４は、図３に示した枠状鉄皮を巻装
したプレ−ト耐火物のコ−ナ−部を拡大して示した部分
拡大説明図である。図４に示すように、従来のプレ−ト
耐火物はコ−ナ−部では枠状鉄皮に密着しているが、直
線部では僅かな隙間４が生じているために、耐火物はコ
−ナ−部で亀裂５1 が生じていた。前記の如きのプレ−
ト耐化物の亀裂５1 は、図５に示すように実機に使用さ
れると熱衝撃などで耐火物中央部の孔と結ぶ亀裂５を生
じさせることになる。FIG. 3 shows a conventional frame-shaped pre-rolled steel frame.
It is explanatory drawing which shows the front of a refractory. In FIG. 3, reference numeral 1 denotes a frame-shaped steel shell, 2 denotes a plate refractory, and 3 denotes a hole formed in the plate refractory 2. FIG. 4 is a partially enlarged explanatory view showing a corner portion of a plate refractory on which the frame-shaped iron skin shown in FIG. 3 is wound. As shown in FIG. 4, the conventional plate refractory is in close contact with the frame-shaped steel at the corner portion, but has a slight gap 4 at the straight portion, so that the refractory is - Na - crack 5 1 have occurred in parts. Play as described above
Crack 5 1 bets resistance to product would produce a crack 5 connecting the hole of the refractory central portion in thermal shock when used in actual, as shown in FIG.
【０００８】[0008]
【発明が解決しようとする課題】この発明は、枠状鉄皮
のコ−ナ−部の曲率を、この部分の耐化物の曲率よりも
小さくして、枠状鉄皮に耐火物を焼き嵌めした場合に、
コ−ナ−部に応力が集中せず、そのため耐火物のコ−ナ
−部に亀裂が発生しないようにした枠状鉄皮を得ようと
したものである。According to the present invention, the curvature of the corner portion of the frame-shaped iron shell is made smaller than the curvature of the refractory material in this portion, and the refractory is shrink-fitted into the frame-shaped iron shell. If you do
It is an object of the present invention to obtain a frame-shaped steel shell in which stress is not concentrated on the corner portion, so that a crack is not generated in the corner portion of the refractory.
【０００９】[0009]
【課題を解決するための手段】この発明は、四角形以上
の多角形の耐火物の外周に嵌挿される枠状の鉄皮で、こ
の鉄皮のコ−ナ−部の曲率が、これに嵌挿される耐火物
の対応するコ−ナ−部の曲率よりも５〜３０％小さい値
であることを特徴とする枠状鉄皮（請求項１）および四
角形以上の多角形の耐火物の外周を枠状鉄皮で補強した
もので、枠状鉄皮のコ−ナ−部の曲率が、枠状鉄皮で補
強される耐火物の対応するコ−ナ−部の曲率よりも５〜
３０％小さい値であることを特徴とする枠状鉄皮で補強
された耐火物（請求項２）である。SUMMARY OF THE INVENTION The present invention relates to a frame-shaped steel shell which is inserted around the outer periphery of a polygonal refractory having a shape of a quadrangle or more, and the curvature of a corner portion of the steel shell is fitted to the steel core. The outer periphery of the frame-shaped iron shell (claim 1) and the polygonal refractory having a square shape or more is smaller than the curvature of the corresponding corner portion of the refractory to be inserted by 5 to 30%. It is reinforced with frame-shaped steel, and the curvature of the corner of the frame-shaped steel is 5 to more than that of the corresponding corner of the refractory reinforced with the frame-shaped steel.
A refractory reinforced with a frame-shaped iron shell, wherein the value is 30% smaller.
【００１０】図１はこの発明になるプレ−ト耐火物で、
その周囲には枠状鉄皮が巻装されている。なお、図１、
図２では従来技術を示す図３と同一部材については同一
符号で示した。即ち、１が枠状鉄皮、２がプレ−ト耐火
物、３が孔である。図２は図１の破線で示す部分を拡大
して示したものである。図２に示すように、この発明で
は枠状鉄皮のコ−ナ−部の曲率を、この部分に対応する
プレ−ト耐火物のコ−ナ−部の曲率よりも小さくして、
ここに隙間４が形成されるようにする。本発明では枠状
鉄皮のコ−ナ−部の内側の曲率を、これに対応するプレ
−ト耐化物のコ−ナ−部の曲率よりも５〜３０％小さい
値とする。この値が５％未満では隙間が小さすぎ十分な
効果が期待できない。また、これが３０％を超えると焼
き嵌め後のプレ−ト耐火物のコ−ナ−部と、これに対応
する鉄皮間の間隔が大きく、実用時の亀裂拡大防止のた
めの拘束力が弱くなり好ましくない。図１、図２ではコ
−ナ−部の１か所だけについて説明したが、プレ−ト耐
火物の全てのコ−ナ−部で上記と同じように上記範囲内
で曲率の差のあることが必要である。曲率の差は上記範
囲内にあることが必要であるが、その差が全てのコ−ナ
−で常に同一である必要はなく、上記範囲内でコ−ナ−
毎に異なっていても差しつかえはない。なお、枠状鉄皮
の形状、構造などは従来のものと相違はない。また、本
発明では、耐火物はプレ−ト耐火物に限らず、立方体そ
の他任意の形状のものでもよい。FIG. 1 shows a plate refractory according to the present invention.
A frame-shaped iron skin is wound around the periphery. In addition, FIG.
2, the same members as those in FIG. 3 showing the prior art are denoted by the same reference numerals. That is, 1 is a frame-shaped iron shell, 2 is a plate refractory, and 3 is a hole. FIG. 2 is an enlarged view of a portion indicated by a broken line in FIG. As shown in FIG. 2, in the present invention, the curvature of the corner portion of the frame-shaped steel shell is made smaller than the curvature of the corner portion of the plate refractory corresponding to this portion.
Here, the gap 4 is formed. In the present invention, the curvature inside the corner portion of the frame-shaped iron shell is set to a value smaller by 5 to 30% than the curvature of the corresponding corner portion of the plate refractory. If this value is less than 5%, the gap is too small and a sufficient effect cannot be expected. On the other hand, if it exceeds 30%, the space between the corner portion of the refractory plate after shrink fitting and the corresponding steel shell is large, and the binding force for preventing crack propagation in practical use is weak. It is not preferable. Although FIGS. 1 and 2 illustrate only one corner of the plate refractory, all corners of the plate refractory have a difference in curvature within the above range in the same manner as described above. is necessary. The difference in curvature must be within the above range, but the difference need not always be the same for all corners.
There is no problem even if it is different every time. The shape, structure, etc. of the frame-shaped iron shell are not different from those of the related art. In the present invention, the refractory is not limited to a plate refractory, but may be a cube or any other shape.
【００１１】[0011]
【作用】この発明は枠状鉄皮のコ−ナ−部の曲率を、こ
れに対応する耐火物のコ−ナ−部の曲率よりも５〜３０
％小さい値にし、焼き嵌め時にコ−ナ−部に応力が集中
しないようにし、さらに耐火物のコ−ナ−部に亀裂を発
生させないような枠状鉄皮としたものである。According to the present invention, the curvature of the corner portion of the frame-like steel is 5 to 30 times smaller than that of the corresponding corner portion of the refractory.
%, So that stress is not concentrated on the corner portion at the time of shrink fitting, and furthermore, a frame-shaped iron shell is formed so as not to generate cracks at the corner portion of the refractory.
【００１２】[0012]
（実施例１〜３，比較例１〜３）厚さ６．０mm、幅４０
mmの鉄製帯条板をル−プ状に溶接した。このル−プをス
ライドゲ−トプレ−ト用耐火物のコ−ナ−部の曲率に対
し、種々の曲率をした金型を用いて枠状鉄皮を製造し、
これを加熱して焼き嵌めした。また、これらを鉄鋼用の
取鍋の流量制御用として実機に用いた。その結果を表１
に示した。(Examples 1-3, Comparative Examples 1-3) Thickness 6.0 mm, width 40
mm strip was welded in a loop. A frame-shaped iron shell was manufactured by using a mold having various curvatures with respect to the curvature of the corner portion of the refractory for a slide gate plate,
This was heated and shrink-fitted. These were used in a real machine for controlling the flow rate of a ladle for steel. Table 1 shows the results.
It was shown to.
【００１３】[0013]
【表１】 [Table 1]
【００１４】表１から明らかなように、本発明によって
得られたものは、焼き嵌めによってプレ−トコ−ナ−部
の欠けはなく、また実機使用の際でも亀裂の発生を小さ
く止めることができる。As is clear from Table 1, the steel obtained according to the present invention has no chipping of the plate corner due to shrink fitting, and can minimize the occurrence of cracks even in actual use. .
【００１５】[0015]
【発明の効果】この発明によれば、耐火物製品のコ−ナ
−部の欠けが無くなり、歩留まりを大幅に向上すること
が出来るようになった。また、実機の使用でも耐火物の
耐用に影響するような大きな亀裂の発生のない製品を製
造することが可能となった。According to the present invention, chipping of the corner portion of the refractory product is eliminated, and the yield can be greatly improved. In addition, it has become possible to manufacture a product that does not have a large crack that affects the service life of the refractory even when the actual machine is used.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の１実施例のプレ−ト耐火物の正面図FIG. 1 is a front view of a plate refractory according to one embodiment of the present invention.
【図２】図１に示すプレ−ト耐火物のコ−ナ−部の部分
拡大図FIG. 2 is a partially enlarged view of a corner portion of the plate refractory shown in FIG.
【図３】従来のプレ−ト耐火物の正面図FIG. 3 is a front view of a conventional plate refractory.
【図４】図３に示すプレ−ト耐火物のコ−ナ−部の部分
拡大図4 is a partially enlarged view of a corner portion of the plate refractory shown in FIG.
【図５】この発明の１実施例のプレ−ト耐火物を実機に
用いた際に生じる亀裂の状態を示した説明図。FIG. 5 is an explanatory view showing a state of a crack generated when the plate refractory of one embodiment of the present invention is used in an actual machine.
１…枠状鉄皮、２…プレ−ト耐火物、４…隙間、５…亀
裂、５1 …亀裂。1 ... frame-shaped iron skin, 2 ... pre - door refractories, 4 ... gap, 5 ... crack, 5 1 ... crack.
フロントページの続き (72)発明者 伊藤 和男 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (56)参考文献 特開 昭60−66086（ＪＰ，Ａ) 特開 昭52−147336（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F27D 1/04 - 1/08 Continuation of the front page (72) Inventor Kazuo Ito 1 Minamito, Ogakie-cho, Kariya-shi, Aichi Pref. Toshiba Ceramics Co., Ltd. Kariya Factory (56) References JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) F27D 1/04-1/08
Claims (2)
挿される枠状の鉄皮で、この鉄皮のコ−ナ−部の曲率
が、これに嵌挿される耐火物の対応するコ−ナ−部の曲
率よりも５〜３０％小さい値であることを特徴とする枠
状鉄皮。1. A frame-shaped steel shell fitted around the outer periphery of a quadrangle or more polygonal refractory, wherein a curvature of a corner portion of the steel shell corresponds to a corresponding core of the refractory inserted into the frame. A frame-shaped steel shell having a value which is smaller by 5 to 30% than a curvature of a corner portion;
状鉄皮で補強したもので、枠状鉄皮のコ−ナ−部の曲率
が、枠状鉄皮で補強される耐火物の対応するコ−ナ−部
の曲率よりも５〜３０％小さい値であることを特徴とす
る枠状鉄皮で補強された耐火物。2. A refractory in which the outer periphery of a quadrangle or more polygonal refractory is reinforced with a frame-shaped steel, and the curvature of the corner portion of the frame-shaped steel is reinforced with the frame-shaped steel. A refractory reinforced with a frame-shaped iron shell, wherein the value is 5 to 30% smaller than the curvature of the corresponding corner portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12953393A JP2952132B2 (en) | 1993-05-31 | 1993-05-31 | Framed steel and refractories reinforced with this framed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12953393A JP2952132B2 (en) | 1993-05-31 | 1993-05-31 | Framed steel and refractories reinforced with this framed steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06341763A JPH06341763A (en) | 1994-12-13 |
| JP2952132B2 true JP2952132B2 (en) | 1999-09-20 |
Family
ID=15011873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12953393A Expired - Fee Related JP2952132B2 (en) | 1993-05-31 | 1993-05-31 | Framed steel and refractories reinforced with this framed steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952132B2 (en) |
-
1993
- 1993-05-31 JP JP12953393A patent/JP2952132B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06341763A (en) | 1994-12-13 |
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