JPS6046060B2 - air seal pipe - Google Patents
air seal pipeInfo
- Publication number
- JPS6046060B2 JPS6046060B2 JP52092796A JP9279677A JPS6046060B2 JP S6046060 B2 JPS6046060 B2 JP S6046060B2 JP 52092796 A JP52092796 A JP 52092796A JP 9279677 A JP9279677 A JP 9279677A JP S6046060 B2 JPS6046060 B2 JP S6046060B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- vibe
- seal
- air seal
- molten metal
- 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
Links
- 239000002184 metal Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 15
- 239000000843 powder Substances 0.000 description 8
- 239000002893 slag Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000004901 spalling Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は連続鋳造法に使用されるエアーシールパイプ
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in air seal pipes used in continuous casting methods.
周知の如く、エアーシールパイプは取鍋の底部に固定
治具等により連結され、かつ下端部をタンデイツシユ内
の溶融金属中に浸して、該取鍋の溶融金属を酸化させる
ことなくタンデイツシユ内に流出させる場合に用いられ
ている。As is well known, the air seal pipe is connected to the bottom of the ladle with a fixing jig or the like, and its lower end is immersed in the molten metal in the tundish so that the molten metal in the ladle flows out into the tundish without oxidizing it. It is used when
しかしながら、従来のエアーシールパイプは全体が同一
材料で構成されているため、周囲の異なつた状況下にみ
あつた性能を共有することはほとんど不可能で あつた
。すなわち、エアーシールパイプは溶融金属及びタンデ
イツシユの溶融金属上面に浮遊するスラグパウダーによ
る浸蝕を考慮して耐蝕性の材料で構成されているが、耐
スポーリング性、熱間強度が劣るため、外気と接触する
部分が熱衝撃により亀裂を生じたり、タンデイツシユ内
の溶融金属の流動によるエアーシールパイプの横振れに
より、エアーシールパイプにおける取鍋との連結部が折
れる問題があつた。 本発明は上記欠点を解消するため
になされたもので、上下に２分域化して各部分を周囲の
状況に適合した材料で構成することによつて、鋳込時の
熱影響による亀裂を阻止し、同時にタンデイツシユ内の
溶融金属及びスラグパウダーと接触する部分の浸蝕を防
止したエアーシールパイプを提供しようとするものであ
る。However, since conventional air seal pipes are entirely made of the same material, it has been almost impossible to share performance under different surrounding conditions. In other words, the air seal pipe is made of a corrosion-resistant material in consideration of corrosion caused by molten metal and slag powder floating on the top surface of the molten metal in the tundish. There have been problems in which cracks occur in the contacting parts due to thermal shock, and the connection part of the air seal pipe with the ladle breaks due to lateral vibration of the air seal pipe due to the flow of molten metal in the tundish. The present invention was made in order to eliminate the above-mentioned drawbacks, and by dividing the area into upper and lower halves and composing each part with a material suitable for the surrounding conditions, cracks caused by heat effects during casting can be prevented. At the same time, it is an object of the present invention to provide an air seal pipe that prevents corrosion of the portion that comes into contact with the molten metal and slag powder in the tundish.
以下、本発明を図面を参照して詳細に説明する。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
図中１は溶融金属２を入れる取鍋で、この取鍋・１底
部の内張レンガ３及び鉄皮４に、エアーシールパイプ５
を該鉄皮４に取付けられた固定治具６を介して連結され
ている。In the figure, 1 is a ladle into which molten metal 2 is placed, and an air seal pipe 5 is attached to the lining brick 3 and iron skin 4 at the bottom of the ladle 1.
are connected via a fixing jig 6 attached to the iron skin 4.
このエアーシールバイブ５の下端部はタンデイツシユ７
内の溶融金属２″及びこの溶融金属２″上面に浮遊する
スラグパウダー８中に浸漬している。なお、タンデイツ
シユ７底部には、鋳造鋳型（図示せず）に溶融金属２″
を鋳込む浸漬ノズル９が連結されている。そして、本発
明においては上記エアーシールバイブ５が略中央で上下
に２分域化され、アルミナ、黒鉛、シリカ及び金属シリ
コンからなる上部シールバイブ５ａと、アルミナ、黒鉛
及び金属シリコンからなる下部シールバイブ５ｂと、か
ら構成されている。本発明における上部シールバイブ５
ａの各成分割合は、アルミナ４０〜５５重量％、黒鉛１
０〜３５重量％、シリカ５〜１５重量％及び金属シリコ
ン３〜１０重量％とすることが望ましい。The lower end of this air seal vibe 5 is connected to the tandate 7.
It is immersed in the molten metal 2'' inside and the slag powder 8 floating on the upper surface of the molten metal 2''. In addition, at the bottom of the tundish 7, a molten metal 2" is placed in a casting mold (not shown).
An immersion nozzle 9 for casting is connected. In the present invention, the air seal vibe 5 is divided into upper and lower sections approximately in the center, with an upper seal vibe 5a made of alumina, graphite, silica, and metal silicon, and a lower seal vibe 5a made of alumina, graphite, and metal silicon. 5b. Upper seal vibe 5 in the present invention
The proportions of each component in a are 40 to 55% by weight of alumina, 1% of graphite
Preferably, the content is 0 to 35% by weight, 5 to 15% by weight of silica, and 3 to 10% by weight of metallic silicon.
この理由は上部シールバイブ中のアルミナ量を７鍾量％
未満すると、耐蝕性が低下して溶融金属の流出時に口径
拡大を招き、かといつて５５重量％を超えると耐スポー
リング性が低下して溶融金属の熱影響により亀−裂を生
じるからである。また、上部シールバイブ中の黒鉛量を
ｗ重量％未満にすると、耐スポーリング性の改善化及び
剥離防止の効果が期待できず、一方その量が３５重量％
を越えると酸化消失劣化が顕在化して耐蝕性が低下する
ばかりか、熱伝，導率が高くなり閉塞を起し易くなるか
らである。さらに、上部シールバイブ中のシリカ量を５
重量％未満にすると、耐スポーリング性、熱間強度の改
善化効果が期待できず、一方その量が１５重量％を越え
ると、耐蝕性か低下し口径拡大を誘引する．からである
。さらにまた、上部シールバイブ中の金属シリコン量を
３重量％未満にすると、アルミナ粒界の結合性を十分高
められず、その結果機械的強度、粒界の耐蝕性の向上化
を達成てきない。かといつて、金属シリコン量が１唾量
％を越える５と、金属シリコン自体の欠点である浸蝕さ
れ易い性質が顕在化して好ましくない。本発明における
上部シールバイブ５ｂの各成分割合はシリカを用いずに
アルミナ６０〜８０重量％、黒鉛５〜３鍾量％及び金属
シリコン３〜Ｗ重量％クとすることが望ましい。The reason for this is that the amount of alumina in the upper seal vibe is 7%.
If it is less than 55% by weight, the corrosion resistance will decrease and the diameter will expand when the molten metal flows out, whereas if it exceeds 55% by weight, the spalling resistance will decrease and cracks will occur due to the thermal influence of the molten metal. . Furthermore, if the amount of graphite in the upper seal vibe is less than w% by weight, the effect of improving spalling resistance and preventing peeling cannot be expected;
This is because, if it exceeds 100%, oxidative loss and deterioration becomes obvious and corrosion resistance decreases, and heat transfer and conductivity increase, making it easier to cause blockage. Furthermore, the amount of silica in the upper seal vibe was increased by 5.
If the amount is less than 15% by weight, no improvement in spalling resistance or hot strength can be expected, while if the amount exceeds 15% by weight, the corrosion resistance will decrease and the diameter will increase. It is from. Furthermore, if the amount of metallic silicon in the upper seal vibe is less than 3% by weight, the bonding properties of alumina grain boundaries cannot be sufficiently increased, and as a result, improvements in mechanical strength and corrosion resistance of grain boundaries cannot be achieved. On the other hand, if the amount of metal silicon exceeds 1% by weight, the corrosion susceptibility, which is a drawback of metal silicon itself, becomes apparent, which is not preferable. The proportions of each component of the upper seal vibe 5b in the present invention are desirably 60 to 80% by weight of alumina, 5 to 3% by weight of graphite, and 3 to 3% by weight of metal silicon, without using silica.
この理由は下部シールバイブ中のアルミナ量を６踵量％
未満にすると、スラグパウダーに対する耐蝕性が低下し
て外径浸蝕を招き、かといつて８鍾量％を越えると、耐
スポーリング性、結合強度が低下するため好ましくない
。また、下部シールバイブ中の黒鉛量を５重量％未満に
すると、耐スポーリング性の改善化及び剥離防止の効果
が期待できず、一方その量が３鍾量％を越えると、酸化
消失劣化が顕在化し、とりわけスラグパウダーに対する
耐蝕性が低下するばかりか、熱伝導率が高くなり閉塞を
起し易くなる。さらに、下部シールバイブ中の金属シリ
コン量を３重量％未満にすると、アルミナ粒界の結合・
性を十分高められす、その結果機械的強度、粒界の耐蝕
性の向上化を達成できない。かといつて、金属シリコン
量が１鍾量％を越えると、金属シリコン自体の欠点であ
る浸蝕され易い性質が顕在化して好ましくない。次に、
上記エアーシールバイブをうるための製造方法を一例を
示して説明する。The reason for this is that the amount of alumina in the lower seal vibe is 6%.
If it is less than 8%, the corrosion resistance against slag powder will decrease, leading to outer diameter corrosion, and if it exceeds 8%, spalling resistance and bonding strength will decrease, which is undesirable. Furthermore, if the amount of graphite in the lower seal vibe is less than 5% by weight, it cannot be expected to improve spalling resistance or prevent peeling, while if the amount exceeds 3% by weight, oxidation loss and deterioration will occur. This not only deteriorates the corrosion resistance especially against slag powder, but also increases the thermal conductivity and makes clogging more likely. Furthermore, if the amount of metallic silicon in the lower seal vibe is less than 3% by weight, the bonding of alumina grain boundaries and
As a result, improvements in mechanical strength and grain boundary corrosion resistance cannot be achieved. On the other hand, if the amount of metal silicon exceeds 1% by weight, the disadvantage of metal silicon itself, which is that it is easily corroded, becomes apparent, which is not preferable. next,
A manufacturing method for obtaining the above air seal vibe will be explained by showing an example.
（１）予めアルミナ、黒鉛、シリカ及び金属シリコンか
らなる耐火物原料、並びにアルミナ、黒鉛及び金属シリ
コンからなる耐火物原料を、夫夫成形、焼成して一端に
オスネジ部を有する上部シールバイブ、一端にメスネジ
部を有する下部シールバイブとし、これらのオスネジ部
とメスネジ部とを螺着接合してエアーシールバイブを造
る。(1) An upper sealing vibrator having a male threaded portion at one end formed by molding and firing refractory raw materials consisting of alumina, graphite, silica, and metallic silicon, and refractory raw materials consisting of alumina, graphite, and metallic silicon in advance; A lower seal vibrator has a female threaded portion on the bottom, and the male threaded portion and female threaded portion are screwed together to form an air seal vibe.
（２）ラバープレス等に、アルミナ、黒鉛、シリカ及び
金属シリコンからなる耐火物原料と、アルミナ、黒鉛及
び金属シリコンからなる耐火物原料とを順次充填して成
形した後、複合成形体をラバープレスから取り出し焼成
せしめてエアーシールバイブを造る。(2) A rubber press or the like is filled with a refractory raw material consisting of alumina, graphite, silica, and metal silicon, and a refractory raw material consisting of alumina, graphite, and metal silicon are sequentially filled and formed, and then the composite molded body is rubber pressed. Take it out and bake it to make an air seal vibe.
なお、上記（１）の方法でエアーシールバイブを造れば
、作業性が簡便になるばかりでなく、下部シールバイブ
が浸蝕されて使用不可能となつても、未だ上部シールバ
イブが使用できる場合、下部シールバイブのみを容易に
交替できるため、原料の有効利用を図ることができる。In addition, if the air seal vibrator is made using the method (1) above, it will not only be easier to work with, but also if the lower seal vibrator is eroded and becomes unusable, the upper seal vibrator can still be used. Since only the lower seal vibrator can be easily replaced, raw materials can be used more effectively.
しかして、本発明によれば取鍋１内の溶融金属２をエア
ーシールバイブ５からタンデイツシユ７内に流出させる
場合、上記エアーシールバイブ５は上下に２分域化され
、上部シールバイブ５ａはアルミナ、黒鉛、シリカ及び
金属シリコンから形成され、とくにシリカが配合されて
いるので熱間強度が優れ、一方下部シールバイブ５ｂは
アルミナ、黒鉛及び金属シリコンから形成され、つまり
シリカが配合されない組成であるので、優れた耐蝕性を
有する特長を発揮できる。したがつて、外気と溶融金属
との間の著しい温度差による熱衝撃により上部シールバ
イブ５ａに亀裂を生じたり、タンデイツシユ７内の溶融
金属２″の流動によるエアーシールバイブ５の横振れに
より上部シールバイブ５ａの取鍋１との連結部が折損し
たりするのを防止でき、同時にタンデイツシユ７内の溶
融金属２″及びスラグパウダー８により下部シールバイ
ブ５ｂが外径浸蝕されるのを防止できる。次に、本発明
の実施例を説明する。実施例
まず、アルミナ５唾量部、黒鉛３踵量部、シリカ１鍾量
部及び金属シリコン５重量部からなる耐火物原料を成形
し、１０００℃で焼成せしめて一端にオスネジ部を有す
る上部シールバイブを製作した。According to the present invention, when the molten metal 2 in the ladle 1 flows out from the air seal vibrator 5 into the tundish 7, the air seal vibrator 5 is divided into upper and lower halves, and the upper seal vibrator 5a is made of alumina. , is formed from graphite, silica, and metal silicon, and has excellent hot strength because silica is especially blended.On the other hand, the lower seal vibe 5b is formed from alumina, graphite, and metal silicon, that is, the composition does not contain silica. , it can exhibit the feature of excellent corrosion resistance. Therefore, cracks may occur in the upper sealing vibrator 5a due to thermal shock caused by a significant temperature difference between the outside air and the molten metal, and the upper sealing vibrator 5a may crack due to lateral vibration of the air sealing vibrator 5 due to the flow of the molten metal 2'' in the tundish 7. It is possible to prevent the connecting portion of the vibrator 5a to the ladle 1 from breaking, and at the same time, it is possible to prevent the outer diameter of the lower seal vibrator 5b from being corroded by the molten metal 2'' in the tundish 7 and the slag powder 8. Next, examples of the present invention will be described. Example First, a refractory raw material consisting of 5 parts by weight of alumina, 3 parts by weight of graphite, 1 part by weight of silica, and 5 parts by weight of metal silicon was molded and fired at 1000°C to form an upper seal having a male thread at one end. I made a vibe.
また、アルミナ６５重量部、黒鉛２踵量部及び金属シリ
コン５重量部からなる耐火物原料を成形し、約１０００
℃て焼成せしめて一端にメスネジ部を有する下部シール
バイブを製作した。次いで、上記上部シールバイブのオ
スネジ部と下部シールバイブのメスネジ部とを螺着一体
化してエアーシールバイブを得た。しかして、得られた
エアーシールバイブを容量１００ｔ０ｎの取鍋底部に連
結し、かつ下端部をタンデイツシユの溶融金属中に浸漬
し、該取鍋内の溶融金属をタンデイツシユ内に全量流出
した後のエアーシールバイブの状態を調べた。In addition, a refractory raw material consisting of 65 parts by weight of alumina, 2 parts by weight of graphite and 5 parts by weight of metal silicon was molded and
A lower seal vibrator having a female threaded portion at one end was manufactured by firing at ℃. Next, the male threaded portion of the upper sealing vibe and the female threaded portion of the lower sealing vibe were screwed together to obtain an air sealing vibe. The air seal vibrator thus obtained was connected to the bottom of a ladle with a capacity of 100 tons, and its lower end was immersed in the molten metal of the tundish. I checked the condition of the seal vibe.
その結果、本発明のエアーシールバイブは外気と接触す
る上部シールバイブの亀裂発生、取鍋との連結部の折損
発生は全く認められなかつた。また、タンデイツシユ内
の溶融金属及びスラグパウグーと接触する部分の局部浸
蝕も全く認められなかつた。以上詳述した如く、本発明
によれは溶融金属による口径拡大、熱衝撃による亀裂発
生、溶融金属の流動による取鍋との連結部の折損発生、
並びにスラグパウダーによる局部的な浸蝕、を極力阻止
して著しく耐用寿命を延長でき、もつて鋳造物の生産性
を著しく向上てきる等顕著な効果を有するエアーシール
バイブを提供できるものである。As a result, in the air seal vibrator of the present invention, no cracks were observed in the upper seal vibrator that came into contact with the outside air, and no breakage occurred in the connection portion with the ladle. Furthermore, no local corrosion was observed at the portions of the tundish that came into contact with the molten metal and the slag powder. As detailed above, according to the present invention, the diameter is enlarged due to molten metal, cracks occur due to thermal shock, and breakage of the connection part with the ladle due to flow of molten metal.
In addition, it is possible to provide an air seal vibrator which has remarkable effects such as significantly extending the service life by preventing local corrosion caused by slag powder as much as possible, and thereby significantly improving the productivity of castings.
図は本発明のエアーシールバイブを取鍋、タンデイツシ
ユ間に取付けた状態を示す断面図である。
１・・・・・・取鍋、２，２″・・・・・・溶融金属、
５・・・・・・エアーシールバイブ、５ａ・・・・・・
上部シールバイブ、５ｂ・・・・・・下部シールバイブ
、７・・・・・・タンデイツシユ。The figure is a sectional view showing the air seal vibe of the present invention installed between a ladle and a tundish. 1... Ladle, 2,2''... Molten metal,
5... Air seal vibe, 5a...
Upper seal vibe, 5b...Lower seal vibe, 7...Tanditudinal.
Claims (1)
シールパイプにおいて、上記エアーシールパイプの上部
と下部の材質を変え、上部シールパイプをアルミナ４０
〜５５重量％、黒鉛１０〜３５重量％、シリカ５〜１５
重量％及び金属シリコン３〜１０重量％の組成とし、か
つ下部シールパイプをアルミナ６０〜８０重量％、黒鉛
５〜３０重量％及び金属シリコン３〜１０重量％の組成
としたことを特徴とするエアーシールパイプ。1. In the air seal pipe that casts the molten metal in the ladle into the tundish, the materials of the upper and lower parts of the air seal pipe are changed, and the upper seal pipe is made of alumina 40.
~55% by weight, graphite 10-35% by weight, silica 5-15
% by weight and a composition of 3-10% by weight of metallic silicon, and the lower seal pipe has a composition of 60-80% by weight of alumina, 5-30% by weight of graphite, and 3-10% by weight of metallic silicon. seal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52092796A JPS6046060B2 (en) | 1977-08-02 | 1977-08-02 | air seal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52092796A JPS6046060B2 (en) | 1977-08-02 | 1977-08-02 | air seal pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5426925A JPS5426925A (en) | 1979-02-28 |
| JPS6046060B2 true JPS6046060B2 (en) | 1985-10-14 |
Family
ID=14064375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52092796A Expired JPS6046060B2 (en) | 1977-08-02 | 1977-08-02 | air seal pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046060B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5742573A (en) * | 1980-08-26 | 1982-03-10 | Shinagawa Refractories Co | Graphitic nozzle for continuous casting |
| JPS60127261A (en) * | 1983-12-12 | 1985-07-06 | ハリマセラミック株式会社 | Nozzle for molten steel casting |
| JPH03114639A (en) * | 1990-08-17 | 1991-05-15 | Harima Ceramic Co Ltd | Nozzle for casting molten steel |
-
1977
- 1977-08-02 JP JP52092796A patent/JPS6046060B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5426925A (en) | 1979-02-28 |
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