JPH01289549A - Nozzle for continuous casting of steel - Google Patents
Nozzle for continuous casting of steelInfo
- Publication number
- JPH01289549A JPH01289549A JP11887288A JP11887288A JPH01289549A JP H01289549 A JPH01289549 A JP H01289549A JP 11887288 A JP11887288 A JP 11887288A JP 11887288 A JP11887288 A JP 11887288A JP H01289549 A JPH01289549 A JP H01289549A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- cao
- mgo
- lining layer
- 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 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 238000009749 continuous casting Methods 0.000 title claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 8
- 239000000376 reactant Substances 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 239000000395 magnesium oxide Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004901 spalling Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は針の連続鋳造に用いられるノズル、さらに評言
すると、溶綱鍋とタンデイツシュをつなぐ上ノズル、中
間ノズル、下部ノズル、ロングノズル等のほか、タンデ
イツシュとモールドをつなぐタンデイツシュノズル、浸
漬ノズル等のノズルに関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a nozzle used for continuous casting of needles, and more specifically, to a nozzle for connecting a melt ladle and a tundish. In addition, the present invention relates to nozzles such as tundish nozzles, immersion nozzles, etc. that connect tundish nozzles and molds.
鋼の連続鋳造工程においては、図２に示すように、上ノ
ズル１１スライデイングプレート２（本発明ではスライ
ディングプレートもノズルの一種として扱う）、中間ノ
ズル３、下部ノズル４、ロングノズル５、上ノズル６、
スライディングプレート７、下部ノズル８及び浸漬ノズ
ル９の如き種々のノズルを組み合わせて、溶鋼を取鍋１
００からタンデイツシュ２００を経てモールド３００へ
導く。ここに使われるノズル材料には、耐スポーリング
性や耐食性に優れるタール含浸アルミナ質、焼成耐火物
、アルミナカーボン質耐火物等がある。In the continuous steel casting process, as shown in FIG. 6,
By combining various nozzles such as sliding plate 7, lower nozzle 8 and immersion nozzle 9, molten steel ladle 1
It leads from 00 to mold 300 via tandaitsu 200. Nozzle materials used here include tar-impregnated alumina, fired refractories, and alumina-carbon refractories, which have excellent spalling and corrosion resistance.
［発明が解決しようとする課題］
しかしながら、鋼の連続鋳造においては、溶鋼中の脱酸
生成物のアルミナ、それに伴う高融点、高粘性の溶鋼が
、図２の１〜９のノズルにおける溶鋼が通過する内孔の
壁に付着し、鋼品質の低下を招くばかりか、さらには、
内孔を閉塞して鋳造を不能にし、操業上大きい損害を与
える。[Problems to be Solved by the Invention] However, in continuous casting of steel, alumina, which is a deoxidation product in molten steel, and the associated high melting point and high viscosity molten steel are Not only does it adhere to the wall of the inner hole through which it passes, reducing the quality of the steel, but also
It clogs the inner hole, making casting impossible and causing major operational damage.
そこで本発明は、綱の連続鋳造用ノズルにして鋼中の脱
酸生成物であるアルミナやそれに伴う高融点、高粘性の
溶鋼が内孔壁に付着しないか、または付着しにくく、ノ
ズル閉塞を起こすおそれのないノズルを提供することを
目的とする。Therefore, the present invention is a nozzle for continuous casting of steel, which prevents alumina, which is a deoxidation product in steel, and the accompanying high melting point, high viscosity molten steel from adhering to the inner hole wall, or which prevents nozzle clogging. The purpose of the present invention is to provide a nozzle that is free from the risk of causing damage.
本発明者は、前記目的を達成すべく鋭意研究の結果、ノ
ズル内孔壁面にＣａＯを存在せしめれば、鋼中脱酸生成
物であるアルミナがノズル内孔壁に付着したとき、この
ＣａＯがこれを吸着し、Ｃａ０−Ａ１．Ｏ，系の低融点
、低粘性の液相が生成され、これが流出してアルミナの
付着が防止され、また、鋳込み初期の熱衝撃によるスポ
ーリングの発生も防止でき、また、耐食性も維持できる
ことを見出し、本発明を完成した。As a result of intensive research to achieve the above object, the present inventor has found that if CaO is present on the wall surface of the nozzle inner hole, when alumina, which is a deoxidation product in steel, adheres to the nozzle inner hole wall, this CaO will be removed. This is adsorbed and Ca0-A1. A low melting point, low viscosity liquid phase of the O, system is generated, which flows out and prevents the adhesion of alumina, and also prevents the occurrence of spalling due to thermal shock at the initial stage of casting, and also maintains corrosion resistance. The present invention has been completed.
すなわち本発明は、ノズル内孔に４０〜９０重量％のＣ
ａ０，０〜５０重景％のＭｇＯ及び０〜２０重量％のＣ
を含む組成物にてライニング層を形成したことを特徴と
する溶鋼の連続鋳造用ノズルを提供するものである。That is, in the present invention, 40 to 90% by weight of C is added to the nozzle inner hole.
a0, 0-50 weight% MgO and 0-20 weight% C
The present invention provides a nozzle for continuous casting of molten steel, characterized in that a lining layer is formed with a composition containing the following.
前記ＭｇＯは加えなくてもよいが、これを加えると前記
ライニング組成物の強度が増す。特に、組成物を構成す
る微粉部にＣａＯを使用したときには消化しやすくなる
ので、このＭｇＯ添加により微粉部を補填することが望
ましい。Although the MgO may not be added, its addition increases the strength of the lining composition. In particular, when CaO is used in the fine powder part of the composition, it becomes easier to digest, so it is desirable to supplement the fine part by adding MgO.
ＭｇＯを加える場合、その量が５０重量％を超えると、
ＣａＯの効果を期待できなくなるばかりか、耐スポーリ
ング性に劣るようになる。従って、ＭｇＯを加える場合
、その量は１０〜５０重量％が望ましい。When adding MgO, if the amount exceeds 50% by weight,
Not only can the effects of CaO no longer be expected, but the spalling resistance becomes inferior. Therefore, when adding MgO, the amount is preferably 10 to 50% by weight.
ＭｇＯ添加のときには、微粉、好ましくは４４μｍ以下
の粒度のものを用いる。When adding MgO, a fine powder, preferably one with a particle size of 44 μm or less, is used.
また、前記Ｃも加えなくてもよいが、適量のＣはライニ
ング組成物と溶鋼との濡れ性を低下させ、ＦｅＯ等の浸
潤による溶損を抑制するので、必要に応じて加えればよ
い。Further, although the above-mentioned C does not need to be added, an appropriate amount of C reduces the wettability between the lining composition and molten steel and suppresses melt loss due to infiltration of FeO, etc., so it may be added as necessary.
Ｃを添加する場合、その量としては、２０％を超えると
かえって酸化による溶損が大きくなるので、３〜２０％
が望ましい。When adding C, the amount should be 3 to 20%, since if it exceeds 20%, the loss due to oxidation will increase.
is desirable.
Ｃ源としては、各種炭素、黒鉛原料のほがフェノールレ
ジン、タールピッチも例示することができる。Examples of the C source include various types of carbon, graphite raw materials, phenol resin, and tar pitch.
なお、前記ライニング層を形成するためのノズル本体材
質としては、第１表にその組成を示すハイアルミナ質、
マグネシア質、ジルコン質、ジルコニア質の耐火物及び
これらにタールを含浸した耐火物を例示することができ
るが、このほかにもノズル材料となり得る適当な材料を
使用することができる。The nozzle body material for forming the lining layer includes high alumina, whose composition is shown in Table 1.
Examples include magnesia-based, zircon-based, and zirconia-based refractories, and refractories impregnated with tar, but other appropriate materials that can be used as nozzle materials can also be used.
第１表
前記ライニング層を形成する方法としては、ノズル内孔
に鋳込み、スタンプ等の方法によって充填し、脱型後１
５０ ’Ｃ以上で熱処理を行う方法を例示することがで
き、この方法によると、経済的であり、ＣａＯの消化の
問題もおこらない。Table 1 The method for forming the lining layer is to fill the inner hole of the nozzle by casting, stamping, etc., and after removing the mold,
A method of heat treatment at 50'C or higher can be exemplified, and this method is economical and does not cause the problem of CaO digestion.
（作 用］
本発明ノズルによると、前記ノズル内孔に形成したライ
ニング層のＣａＯがＡｌｚＯ＊を吸収してＣａ０−Ａｌ
□０３系の反応物を生成し、Ａｌ２Ｏ，の吸着量の増加
とともに該反応物はその融点及び粘性が低下し、流出す
る。(Function) According to the nozzle of the present invention, CaO in the lining layer formed in the nozzle inner hole absorbs AlzO* and forms Ca0-Al.
A □03-based reactant is produced, and as the adsorption amount of Al2O increases, the melting point and viscosity of the reactant decrease, and the reactant flows out.
以下、本発明の実施例を第１図及び第２図を参照しつつ
説明する。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本発明を適用した中間ノズルの断面を示してい
る。FIG. 1 shows a cross section of an intermediate nozzle to which the present invention is applied.
該中間ノズル１０はその内孔２０周壁にライニング層３
０が形成されている。該ライニング層の厚さは約８ｍｌ
１１である。The intermediate nozzle 10 has a lining layer 3 on the circumferential wall of the inner hole 20.
0 is formed. The thickness of the lining layer is approximately 8ml
It is 11.
該ライニング層を形成する組成物の組成は第２表に示す
とおりである。The composition of the composition forming the lining layer is shown in Table 2.
なお、第２表には従来比較品ノズル（ハイアルミナ質タ
ール含浸材料からなり、ライニング層を形成していない
中間ノズル）の組成も示されている。Table 2 also shows the composition of a conventional comparative nozzle (an intermediate nozzle made of a high alumina tar-impregnated material and without a lining layer).
第２表
前記実施例ノズル及び比較品ノズルを用いて鋼連続鋳造
を行ったところ、比較品は使用開始後５０分の時点で地
金主体のノズル内孔閉塞を起こしたのに対し、実施例ノ
ズルでは何ら閉塞なく円滑に鋳込みを行うことができた
。Table 2 When continuous steel casting was carried out using the above-mentioned example nozzle and comparative nozzle, the nozzle inner hole of the comparative product became clogged mainly by the bare metal 50 minutes after the start of use, whereas the example nozzle The nozzle was able to perform smooth casting without any blockages.
該実施測高を使用後に切断して内孔を観察したところ、
比較品に見られるような付着物は見られなかった。When the actual height measurement was cut after use and the inner hole was observed,
No deposits were observed as seen in comparative products.
本発明によると、鋼の連続鋳造用ノズルにして、ノズル
閉塞を起こさずに安定操業ができ、また、ＣａＯの吸着
作用により、鋼中の脱酸生成物であるＡ１．Ｏ，が低減
され、清浄鋼による鋳込みが可能となるノズルを提供す
ることができる。According to the present invention, a nozzle for continuous casting of steel can be operated stably without causing nozzle clogging, and due to the adsorption effect of CaO, A1. It is possible to provide a nozzle that reduces O, and enables casting with clean steel.
第１図は本発明の一実施例の断面図、第２図は鋼の連続
鋳造に用いられる各種ノズルの説明図である。
１０・・・中間ノズル、
２０・・・内孔、
３０・・・ライニング層。FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of various nozzles used for continuous casting of steel. 10... Intermediate nozzle, 20... Inner hole, 30... Lining layer.
Claims (1)
０重量％のＭｇＯ及び０〜２０重量％のＣを含む組成物
にてライニング層を形成したことを特徴とする溶鋼の連
続鋳造用ノズル。(1) 40-90% by weight of CaO in the nozzle inner hole, 0-5
1. A nozzle for continuous casting of molten steel, characterized in that a lining layer is formed of a composition containing 0% by weight of MgO and 0 to 20% by weight of C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11887288A JPH01289549A (en) | 1988-05-16 | 1988-05-16 | Nozzle for continuous casting of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11887288A JPH01289549A (en) | 1988-05-16 | 1988-05-16 | Nozzle for continuous casting of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01289549A true JPH01289549A (en) | 1989-11-21 |
Family
ID=14747207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11887288A Pending JPH01289549A (en) | 1988-05-16 | 1988-05-16 | Nozzle for continuous casting of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01289549A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005060128A (en) * | 2003-08-19 | 2005-03-10 | Nippon Steel Corp | Refractory |
| EP1541260A1 (en) * | 2002-08-22 | 2005-06-15 | Krosakiharima Corporation | Method for continuous casting of molten steel for thin sheet |
| JP2006068799A (en) * | 2004-09-06 | 2006-03-16 | Kurosaki Harima Corp | Hardly adhesive continuous casting nozzle |
| US7172013B2 (en) * | 2002-04-02 | 2007-02-06 | Krosakiharima Corporation | Binding structure of refractory sleeve for inner hole of nozzle for continuous casting |
| US7275584B2 (en) * | 2003-08-22 | 2007-10-02 | Krosakiharima Corporation | Immersion nozzle for continuous casting of steel and continuous steel casting method using same |
| WO2011138831A1 (en) | 2010-05-07 | 2011-11-10 | 黒崎播磨株式会社 | Refractory, continuous casting nozzle comprising the refractory, process for production of continuous casting nozzle, and continuous casting method using the continuous casting nozzle |
| US8251129B2 (en) | 2010-05-13 | 2012-08-28 | Krosakiharima Corporation | Refractory material, continuous casting nozzle using the refractory material, production methods for the continuous casting nozzle, and continuous casting methods using the continuous casting nozzle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6153150A (en) * | 1984-08-24 | 1986-03-17 | ハリマセラミック株式会社 | Nozzle for molten steel casting |
| JPS63104761A (en) * | 1986-10-21 | 1988-05-10 | Tokyo Yogyo Co Ltd | Nozzle for continuous casting |
-
1988
- 1988-05-16 JP JP11887288A patent/JPH01289549A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6153150A (en) * | 1984-08-24 | 1986-03-17 | ハリマセラミック株式会社 | Nozzle for molten steel casting |
| JPS63104761A (en) * | 1986-10-21 | 1988-05-10 | Tokyo Yogyo Co Ltd | Nozzle for continuous casting |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7172013B2 (en) * | 2002-04-02 | 2007-02-06 | Krosakiharima Corporation | Binding structure of refractory sleeve for inner hole of nozzle for continuous casting |
| EP1541260A1 (en) * | 2002-08-22 | 2005-06-15 | Krosakiharima Corporation | Method for continuous casting of molten steel for thin sheet |
| EP1541260A4 (en) * | 2002-08-22 | 2006-05-17 | Krosakiharima Corp | Method for continuous casting of molten steel for thin sheet |
| JP2005060128A (en) * | 2003-08-19 | 2005-03-10 | Nippon Steel Corp | Refractory |
| JP4580155B2 (en) * | 2003-08-19 | 2010-11-10 | 新日本製鐵株式会社 | Continuous casting nozzle |
| US7275584B2 (en) * | 2003-08-22 | 2007-10-02 | Krosakiharima Corporation | Immersion nozzle for continuous casting of steel and continuous steel casting method using same |
| JP2006068799A (en) * | 2004-09-06 | 2006-03-16 | Kurosaki Harima Corp | Hardly adhesive continuous casting nozzle |
| JP4533052B2 (en) * | 2004-09-06 | 2010-08-25 | 黒崎播磨株式会社 | Non-adhesive continuous casting nozzle |
| WO2011138831A1 (en) | 2010-05-07 | 2011-11-10 | 黒崎播磨株式会社 | Refractory, continuous casting nozzle comprising the refractory, process for production of continuous casting nozzle, and continuous casting method using the continuous casting nozzle |
| US8251129B2 (en) | 2010-05-13 | 2012-08-28 | Krosakiharima Corporation | Refractory material, continuous casting nozzle using the refractory material, production methods for the continuous casting nozzle, and continuous casting methods using the continuous casting nozzle |
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