JPH0323060A - Sliding nozzle plate - Google Patents
Sliding nozzle plateInfo
- Publication number
- JPH0323060A JPH0323060A JP15639989A JP15639989A JPH0323060A JP H0323060 A JPH0323060 A JP H0323060A JP 15639989 A JP15639989 A JP 15639989A JP 15639989 A JP15639989 A JP 15639989A JP H0323060 A JPH0323060 A JP H0323060A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- sliding nozzle
- plate
- molten steel
- nozzle plate
- 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
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000004901 spalling Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 239000003575 carbonaceous material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスライディン、グノズルプレートの材質に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a material for a sliding nozzle plate.
溶鋼鍋（タンディソシュも含む）からの溶鋼流出量を調
整する目的で、該｝容鋼鍋の？容鋼流出口にスライディ
ングノズルプレートが配設される。このスライディング
ノズルプレートのノズル孔付近は開口時に直接溶鋼流が
接するために、耐熱スポーリング性が要求される他、耐
化学的侵食性や耐物理磨耗性に優れていることが要求さ
れる。また閉状態で溶融金属と接する、いわゆる、スト
ップゾーンは耐熱スポーリング性はもとより耐ピーリン
グ性と耐化学的侵食性が要求される。For the purpose of adjusting the amount of molten steel flowing out from the molten steel ladle (including Tandi Sosh), A sliding nozzle plate is disposed at the steel outlet. Since the vicinity of the nozzle hole of this sliding nozzle plate is directly contacted by the molten steel flow when it is opened, it is required to have heat spalling resistance, as well as excellent chemical erosion resistance and physical abrasion resistance. Furthermore, the so-called stop zone, which is in contact with molten metal in a closed state, is required to have not only heat spalling resistance but also peeling resistance and chemical attack resistance.
ところが従来このスライディングノズルプレートとして
アルξナーカーボン質材料のみを用いていたため、高酸
素鋼に対しては鋼中酸素によりノズル孔付近の材料中の
カーボンが酸化される化学的侵食が激しく、またそれに
伴ってＭ！ＬＩ！ｉが脆弱になり、物理的な磨耗も激し
くなる欠陥があった。However, because conventionally only alumina carbonaceous material was used for this sliding nozzle plate, chemical attack of high-oxygen steel, in which carbon in the material near the nozzle hole is oxidized by oxygen in the steel, was severe, and M with me! LI! There was a defect that made the i brittle and caused severe physical wear.
また、ストップゾーンにおいても上記同様、化学的な侵
食を受けて面荒れが生じたりする。これら欠点をカバー
するため、カーボンを含まないマグネシア、スビネル、
アルミナまたはジルコニアを主体とした焼成体を用いる
と地金がノズル孔近辺に付着し、使用時間とともに摺動
時、地金の噛み込みにより？８鋼が面間から漏れ易くな
る傾向が強かった。Furthermore, in the same manner as described above, the surface of the stop zone may become rough due to chemical erosion. To cover these drawbacks, carbon-free magnesia, subinel,
If a fired body mainly made of alumina or zirconia is used, the base metal will adhere to the vicinity of the nozzle hole, and over time the base metal will get caught during sliding. Steel No. 8 had a strong tendency to leak between surfaces.
上記アルミナーカーボン質材料に加えて、ＢＮの溶鋼濡
れ難さ、摺動特性の良さを利用して耐火材にＢＮ及び炭
素質を混合したスライディングノズルプレートの開発も
試みられている（特開昭５９１９０２５２）が耐酸化性
は十分ではなかった。In addition to the above-mentioned alumina-carbonaceous materials, attempts have been made to develop a sliding nozzle plate in which BN and carbonaceous materials are mixed with a refractory material, taking advantage of BN's difficulty in getting wet with molten steel and its good sliding properties (JP-A-Sho). 59190252), but the oxidation resistance was not sufficient.
本発明は上記問題点に鑑みて提案されたものであって、
ノズル孔付近の耐蝕性を高め、かつ、ストソプゾーンの
面荒れも生じないスライディングノズルプレートを提供
することを目的とする。The present invention has been proposed in view of the above problems, and includes:
It is an object of the present invention to provide a sliding nozzle plate that has improved corrosion resistance near a nozzle hole and does not cause surface roughness in the stroblast zone.
上記目的を達成するためにこの発明は以下の手段を採用
している。すなわち、Ｓｉｎ．含有量が１％以下の耐火
骨材を７０〜９９％、ＢＮが０．５〜３０％、Ｂ ４Ｃ
が０．１〜ｌＯ％からなる不焼成、または焼成スライデ
ィングノズルプレートとしたものである。In order to achieve the above object, the present invention employs the following means. That is, Sin. 70-99% refractory aggregate with a content of 1% or less, BN 0.5-30%, B 4C
is an unfired or fired sliding nozzle plate having a content of 0.1 to 10%.
Ｂ４ＣはＢＨに比較してれんが組織中で酸素と反応した
場合、ＣＯが生威し、これがカーボンとして組織中に沈
着する性質を有している。すなわち、この現象が組織中
の気孔を埋める働きがあり、それ以上大気が侵入するの
を抑制する。この考え方とＢＮの溶鋼に対する濡れ難さ
、さらに骨材としてのＡ ６ ．０３やＺｒＯ．はＢＮ
が酸化したＢ２０，と直接反応しないことを生かして、
ＡｆｆｚＣｈ−ＢＮ−Ｂ４Ｃ系、ＺｒＯｚ ＢＮ
ＢａＣ系を開発した。また、ＡＩ！２０，やＺ ｒ Ｏ
ｚ等の耐火骨材中のＳ ｉ Ｏ ｔの含有量は極力必
要最小限に抑え、ＢＺ Ｑ ｓ Ｓ Ｉ． Ｏ ｚガ
ラスの生戒による耐蝕性の低下を回避した。この場合Ｓ
ｉｎ２は１％以内がより望ましい。ＢＮは０．５％以上
使用しないと所期の目的である地金の付着を防止する効
果は少なく、３０％以上使用するとＢＮ自身の酸化によ
る組織の劣化が著しくなり好ましくない。Compared to BH, B4C has the property that when it reacts with oxygen in the brick structure, CO is produced and this is deposited in the structure as carbon. In other words, this phenomenon has the effect of filling the pores in the tissue, thereby suppressing further entry of air. This idea, BN's difficulty in getting wet with molten steel, and A6 as an aggregate. 03 and ZrO. is BN
Taking advantage of the fact that it does not react directly with oxidized B20,
AffzCh-BN-B4C series, ZrOz BN
Developed BaC system. Also, AI! 20, Ya Z r O
The content of S i O t in refractory aggregates such as BZ Q s I. This avoids the decrease in corrosion resistance caused by the aging of Oz glass. In this case S
More preferably, in2 is within 1%. If BN is not used in an amount of 0.5% or more, the intended effect of preventing metal adhesion will be low, and if it is used in a proportion of 30% or more, the structure will deteriorate significantly due to oxidation of the BN itself, which is not preferable.
Ｂ ａ Ｃは０．１％以上使用しないと酸化防止効果が
十分でなく、１０％以上使用すると過焼結がおこるとと
もに、耐蝕性の低下も著しくなる。If B a C is not used in an amount of 0.1% or more, the antioxidant effect will not be sufficient, and if it is used in an amount of 10% or more, oversintering will occur and the corrosion resistance will be significantly reduced.
（実施例ｌ）
第１表に示す狙１〜旭６及び従来品の原料組成のものを
混練、或形し、これを１３００℃で還元焼成した。焼戒
後の品質を同じく第１表に示す。(Example 1) The raw material compositions of Aim 1 to Asahi 6 and conventional products shown in Table 1 were kneaded and shaped, and this was reduced and fired at 1300°C. The quality after burning is also shown in Table 1.
これらの中で患４の配合について溶鋼鍋用スライディン
グノズルを製造し、従来材質と耐用性を比較した。特に
高酸素鋼であるＳＳ４１に対して使用したところ、発明
品は８チャージの耐用を示したのに対して従来品は３チ
ャージの耐用にとどまった。Among these, a sliding nozzle for a molten steel ladle was manufactured using the formulation No. 4, and its durability was compared with conventional materials. In particular, when used on SS41, which is a high-oxygen steel, the invented product showed a durability of 8 charges, while the conventional product only had a durability of 3 charges.
（実施例■）
第２表に示す原料組戒のものを混練、威形し３００℃で
加熱処理した。これらの品質を同じく第２表に示す。第
２表中のＮｌｌ３配合についてタンディソシュ用スラ・
ｆディングノズルを製造し、ＳＳ４１鋼を用いて従来材
質と耐用性を比較したところ従来材質は８チャージの耐
用にとどまったのに対して、本発明品は１６チャージの
耐用を示した．（以下余白）
〔発明の効果〕
以上説明したように、この発明はアルミナ、又はジルコ
ニア原料に対してＢＮとともに８ ４ Ｃをも合わせて
使用しているので、高酸素鋼に対しても、従来のアル５
ナーカーポン系材質に比べて飛躍的に寿命向上が果たせ
た。(Example ■) The raw material compositions shown in Table 2 were kneaded, shaped, and heat-treated at 300°C. Their quality is also shown in Table 2. Regarding the Nll3 formulation in Table 2, Sura・
When a f-ding nozzle was manufactured and its durability was compared with a conventional material using SS41 steel, the conventional material could only last for 8 charges, whereas the product of the present invention had a lifespan of 16 charges. (Blank below) [Effect of the invention] As explained above, this invention uses 84C as well as BN for alumina or zirconia raw materials, so it is better than conventional steels for high oxygen steel. Al 5
The lifespan has been dramatically improved compared to Nakarpon-based materials.
Claims (1)
９９％、ＢＮが０．５〜３０％、Ｂ＿４Ｃが０．１〜１
０％からなる不焼成スライディングノズルプレート。 〔２〕ＳｉＯ＿２含有量が１％以下の耐火骨材を７０〜
９９％、ＢＮが０．５〜３０％、Ｂ＿４Ｃが０．１％〜
１０％からなる焼成スライディングノズルプレート。[Scope of Claims] [1] Refractory aggregate with SiO_2 content of 1% or less
99%, BN 0.5-30%, B_4C 0.1-1
Unfired sliding nozzle plate consisting of 0%. [2] Refractory aggregate with SiO_2 content of 1% or less from 70 to
99%, BN 0.5-30%, B_4C 0.1%-
Fired sliding nozzle plate consisting of 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15639989A JPH0323060A (en) | 1989-06-19 | 1989-06-19 | Sliding nozzle plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15639989A JPH0323060A (en) | 1989-06-19 | 1989-06-19 | Sliding nozzle plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0323060A true JPH0323060A (en) | 1991-01-31 |
Family
ID=15626890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15639989A Pending JPH0323060A (en) | 1989-06-19 | 1989-06-19 | Sliding nozzle plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0323060A (en) |
-
1989
- 1989-06-19 JP JP15639989A patent/JPH0323060A/en active Pending
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