JPH0360859A - Sliding nozzle plate - Google Patents
Sliding nozzle plateInfo
- Publication number
- JPH0360859A JPH0360859A JP1197297A JP19729789A JPH0360859A JP H0360859 A JPH0360859 A JP H0360859A JP 1197297 A JP1197297 A JP 1197297A JP 19729789 A JP19729789 A JP 19729789A JP H0360859 A JPH0360859 A JP H0360859A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle plate
- sliding nozzle
- corrosion resistance
- sliding
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 229910007948 ZrB2 Inorganic materials 0.000 abstract 1
- VWZIXVXBCBBRGP-UHFFFAOYSA-N boron;zirconium Chemical compound B#[Zr]#B VWZIXVXBCBBRGP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- 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（タンデイツシュを含む）からの溶鋼流出量を調
整する目的で、該溶鋼鍋の下側にスライディングプレー
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ビ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 the tundish), a sliding plate is disposed below the molten steel ladle. 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. In addition, 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 billing 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
てアルミナ−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
れに伴って組織が脆弱になり、物理的な磨耗も激しくな
る欠陥があった。However, in the past, only alumina-carbon materials were used for this sliding nozzle plate, so
For high-oxygen steel, the oxygen in the steel oxidizes the carbon in the material near the nozzle hole, resulting in severe chemical attack, which also causes the structure to become brittle and cause 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、スピネル、ア
ルξす又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溶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. In order to overcome these drawbacks, using a fired body mainly made of magnesia, spinel, aluminum or zirconia that does not contain carbon,
The base metal adhered to the vicinity of the nozzle hole, and as the time of use increased, there was a strong tendency for molten steel to leak from between the surfaces due to the base metal getting caught during sliding.
上記アルミナ−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
素質と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５９−１９０２５２ ）が、耐
酸化性は充分ではなかった。In addition to the above-mentioned alumina-carbonaceous materials, attempts have been made to develop a sliding nozzle plate in which a refractory material is mixed with BN and carbonaceous materials, taking advantage of BN's resistance to wetting with molten steel and good sliding properties (JP-A-Sho). 59-190252), 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、
ノズル孔付近の耐食性を高め、かつ、ストップゾーンの
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 stop 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６０〜９９％、ＺｒＢｚが０、５〜４０％、Ｂｓ
Ｃが０． １％〜ｌＯ％からなり、坑底又は不坑底とし
たものである。In order to achieve the above object, the present invention employs the following means. That is, the refractory aggregate with a Sin content of 1% or less is 60-99%, ZrBz is 0, 5-40%, Bs
C is 0. It consists of 1% to 10%, and is made into a bottom of a mine or an undone bottom.
Ｚ ｒ Ｂ ｔは溶鋼に対して濡れにくく、また酸化に
よって生威したＢ！０３が骨材であるＡｌ、０、やＺｒ
０ｚと直接反応しないのでカーボンより安定している。Z r B t is difficult to get wet with molten steel, and B! 03 is aggregate Al, 0, or Zr
It is more stable than carbon because it does not react directly with 0z.
また、上記Ｂ４Ｃはれんが組織中で酸素と反応した場合
４ＣＯが生威し、これがカーボンとして組織中に沈着し
、組織中の気孔を埋設する働きがあり、それ以上大気が
侵入するのを抑制する。In addition, when the above B4C reacts with oxygen in the brick structure, 4CO is produced, which is deposited in the structure as carbon and has the function of filling the pores in the structure, suppressing further atmospheric intrusion. .
上記ＺｒＢｚ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、４０％以上使
用するとＺｒＢ、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。If the above-mentioned ZrBz is not used in an amount of 0.5% or more, the effect of preventing the adhesion of base metal, which is the intended purpose, will be small, and if it is used in an amount of 40% or more, the structure will deteriorate significantly due to oxidation of ZrB itself, which is not preferable.
Ｂ４Ｃは０．１％以上使用しないと酸化防止効果が充分
ではなく、１０％以上使用すると８．０、の過剰生成に
よる過焼結が起こるとともに耐食性も著しく低下する。If B4C 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 due to excessive production of B4C, and the corrosion resistance will also be significantly reduced.
耐火骨材としてはＺ ｒ Ｏ！又はＡｆｆｉｘＯ＋が６
０〜９９％用いられる。この骨材中のＳｉｎ、の存在は
耐食性を低下させるので、該ＳｉＯ２の存在を極力必要
最少限に抑え、ＢｇＯａ Ｓｉ０ｇガラスの過剰生成
による耐食性の低下を回避した。As a refractory aggregate, Z r O! or AffixO+ is 6
0-99% used. Since the presence of Sin in this aggregate reduces corrosion resistance, the presence of SiO2 was minimized to the minimum necessary to avoid a reduction in corrosion resistance due to excessive production of BgOa SiOg glass.
この場合Ｓｉｎ、は１％以内がより望ましいと考えられ
る。In this case, it is considered more desirable that Sin be within 1%.
尚、この発明において、上記ｍ或のものを成形後、坑底
して使用することができるが、不坑底のまま使用しても
充分な効果が得られる。Incidentally, in this invention, after molding the above-mentioned item m, it can be used at the bottom of a pit, but sufficient effects can be obtained even if it is used as it is without the bottom of a pit.
天紅む４上
第１表は骨材として焼結アルミナを用いた場合のこの発
明の実施例を示すものである。第１表に示すように配合
した本願発明品１１ｈｌ〜６及び比較例としての従来品
を混練・成形し、１３００℃で還元焼成し、焼成後の特
性を同じく第１表に示す。Table 1 of Tenkomu 4 shows examples of the present invention in which sintered alumina is used as the aggregate. The products 11hl to 6 of the present invention, which were formulated as shown in Table 1, and the conventional product as a comparative example were kneaded and molded, and then reduced and fired at 1300°C. The properties after firing are also shown in Table 1.
この第１表によると本願発明品は気孔率、曲げ強さ、カ
サ比重とも従来とほとんど変わりないが、耐食性におい
て優れ、また、濡れ性も小さいことが理解できる。According to Table 1, the products of the present invention have almost the same porosity, bending strength, and bulk specific gravity as the conventional products, but are superior in corrosion resistance and have low wettability.
これらの内、本願発明品１１ａ１４について溶鋼鍋用ス
ライディングノズルを製造し、２５０を鍋で従来材質と
耐用性を比較した。特に、高酸素鋼である５Ｓ４１に対
して使用したところ、本願発明品は９ｃｈの耐用を示し
たのに対して、従来品は３ｃｈの耐用であった。Among these, a sliding nozzle for a ladle of molten steel was manufactured using the product 11a14 of the present invention, and the durability was compared with conventional materials using a ladle of 250. In particular, when used on 5S41, which is a high oxygen steel, the product of the present invention showed a durability of 9 channels, while the conventional product showed a durability of 3 channels.
大嵐斑主
第２表は骨材として部分安定化ジルコニアを使用した場
合の実施例を示すものである。第２表に示す原料ｍ威の
ものを混練・成形し、３００℃で加熱処理した後のこれ
らの特性を同じく第２表に示す。Table 2 shows examples in which partially stabilized zirconia was used as the aggregate. Table 2 also shows the properties of the raw materials shown in Table 2 after kneading and molding and heat-treating at 300°C.
第１表に示した実施例と同様気孔率、曲げ強さ、カサ比
重とも従来例とほとんど変わりないが、耐食性において
優れ、濡れ性も小さいことが理解できる。第２表中の本
願発明品Ｍ５についてタンデイツシュ用スライディング
ノズルを製造し、２ストランドの両サイドで従来品と本
願発明品とでその耐用性を比較した。５５４１ｍ種に対
して従来品は８ｃｈで交換を要したのに対して、本願発
明品はその倍の１５ｃｈの耐用を示した。As with the examples shown in Table 1, the porosity, bending strength, and bulk specific gravity are almost the same as in the conventional example, but it can be seen that the corrosion resistance is excellent and the wettability is low. A sliding nozzle for a tundish tissue was manufactured for the invention product M5 in Table 2, and the durability was compared between the conventional product and the invention product on both sides of the two strands. For the 5541m type, while the conventional product required replacement after 8 channels, the product of the present invention showed a service life of 15 channels, which is twice that.
尚、上記第１表に示した本願実施例は焼成しているが、
不焼成であっても同様の効果が得られる。Incidentally, although the Examples of the present application shown in Table 1 above are fired,
Similar effects can be obtained even if the material is not fired.
また、逆に、第２表の実施例においても焼成法を用いる
ことも可能である。Conversely, it is also possible to use the sintering method in the examples shown in Table 2.
以下余白
〔発明の効果〕
以上説明したように、この発明は骨材に対してＺｒＢ、
と８４Ｃを添加しているので耐食性に優れ、かつ、濡れ
性も少ないスライディングノズルプレートを提供するこ
とができ、特に、高酸素鋼ないしは極低炭鋼に対して飛
躍的に耐用性の向上が図れる。Margin below [Effects of the invention] As explained above, the present invention provides ZrB, ZrB, and
By adding 84C and 84C, it is possible to provide a sliding nozzle plate with excellent corrosion resistance and low wettability, and in particular, the durability can be dramatically improved against high oxygen steel or ultra-low carbon steel. .
Claims (1)
９９％、ＺｒＢ＿２が０．５〜４０％、Ｂ＿４Ｃが０．
１％〜１０％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６０〜
９９％、ＺｒＢ＿２が０．５〜４０％、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 a SiO_2 content of 1% or less
99%, ZrB_2 0.5-40%, B_4C 0.
Unfired sliding nozzle plate consisting of 1% to 10%. [2] Refractory aggregate with SiO_2 content of 1% or less from 60 to
99%, ZrB_2 0.5-40%, B_4C 0.
A fired sliding nozzle plate consisting of 1-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197297A JPH0360859A (en) | 1989-07-28 | 1989-07-28 | Sliding nozzle plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197297A JPH0360859A (en) | 1989-07-28 | 1989-07-28 | Sliding nozzle plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0360859A true JPH0360859A (en) | 1991-03-15 |
Family
ID=16372119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1197297A Pending JPH0360859A (en) | 1989-07-28 | 1989-07-28 | Sliding nozzle plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0360859A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10019600A1 (en) * | 2000-04-20 | 2001-10-31 | Kempten Elektroschmelz Gmbh | Refractory material with improved resistance to slag attack |
| WO2009072652A1 (en) * | 2007-12-07 | 2009-06-11 | Krosakiharima Corporation | Aluminum compound-bonded brick for furnace hearth |
-
1989
- 1989-07-28 JP JP1197297A patent/JPH0360859A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10019600A1 (en) * | 2000-04-20 | 2001-10-31 | Kempten Elektroschmelz Gmbh | Refractory material with improved resistance to slag attack |
| WO2009072652A1 (en) * | 2007-12-07 | 2009-06-11 | Krosakiharima Corporation | Aluminum compound-bonded brick for furnace hearth |
| JP5249948B2 (en) * | 2007-12-07 | 2013-07-31 | 黒崎播磨株式会社 | Blast furnace hearth |
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