JPH0320035Y2 - - Google Patents
Info
- Publication number
- JPH0320035Y2 JPH0320035Y2 JP17987286U JP17987286U JPH0320035Y2 JP H0320035 Y2 JPH0320035 Y2 JP H0320035Y2 JP 17987286 U JP17987286 U JP 17987286U JP 17987286 U JP17987286 U JP 17987286U JP H0320035 Y2 JPH0320035 Y2 JP H0320035Y2
- Authority
- JP
- Japan
- Prior art keywords
- cao
- discharge hole
- immersion nozzle
- molten steel
- casting
- 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
- 238000007654 immersion Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000005266 casting Methods 0.000 claims description 6
- 238000009749 continuous casting Methods 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 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
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 210000003000 inclusion body Anatomy 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、製鉄分野における連続鋳造等の鋳造
用の浸漬ノズルに関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an immersion nozzle for casting such as continuous casting in the field of iron manufacturing.
従来の技術
溶鋼をタンデイツシユからモールドに注入する
際、溶鋼の酸化防止および酸化物の混入による介
在物の発生を防止するために、モールド内の溶鋼
中に浸漬して溶鋼流を無酸化状態で注入する浸漬
ノズルが使用されて、相当の効果を挙げている。
しかし、この浸漬ノズルを使用した場合でも、ノ
ズルの吐出孔の形状によつて、製品鋳片の品質は
大きく左右され、特に鋳片がスラブ形状の場合に
著しいものであつた。そのため、溶鋼中の介在物
の浮上促進に、吐出形状が逆Ｙ型のものやウエル
タイプのもの等々種々の浸漬ノズルが提案されて
いる。Conventional technology When pouring molten steel from a tundish into a mold, in order to prevent the molten steel from oxidizing and to prevent the generation of inclusions due to the mixing of oxides, the molten steel is immersed in the molten steel in the mold and the molten steel flow is injected in a non-oxidized state. Immersion nozzles have been used with considerable success.
However, even when this immersion nozzle is used, the quality of the product slab is greatly influenced by the shape of the discharge hole of the nozzle, and this is particularly noticeable when the slab is in the form of a slab. Therefore, various immersion nozzles, such as those with an inverted Y-shaped discharge shape and well-type ones, have been proposed to promote the floating of inclusions in molten steel.
考案が解決しようとする問題点
しかし、浸漬ノズルの吐出孔が逆Ｙ型のものが
一般に使用されているが、溶鋼が乱流となるた
め、モールドパウダーを巻き込むものであつた。Problems to be Solved by the Invention However, immersion nozzles with inverted Y-shaped discharge holes are generally used, but the molten steel flows in a turbulent flow, which entrains the mold powder.
また、ウエルタイプのものは、溶鋼を整流化で
きて好ましいが、鋳込み速度が速くなるとその効
果が徐々に薄れるものであつた。 Further, the well type is preferable because it can rectify the molten steel, but its effect gradually diminishes as the casting speed increases.
問題点を解決するための手段
本考案は上記のような点に鑑みたもので、連続
鋳造のタンデイツシユ等に取着して清浄鋼を鋳造
するための浸漬ノズルの吐出孔部を側方にやや長
目に突出して形成し、この吐出孔部にCaOを主成
分とした格子状、棒状等のCaO含有体を取着した
ことを特徴とする鋳造用の浸漬ノズルを提供する
にある。Means for Solving the Problems The present invention was developed in view of the above points, and the discharge hole of the immersion nozzle, which is attached to a tundish for continuous casting and used to cast clean steel, is slightly oriented to the side. To provide a immersion nozzle for casting, which is formed in a long protruding manner and has a CaO-containing body in the shape of a grid, rod, etc. containing CaO as a main component attached to the discharge hole.
作 用
本考案によれば、浸漬ノズルを流出する溶鋼を
やや長目に側方に突き出した吐出孔によつて整流
化できるとともに、溶鋼流がCaOを主成分とする
CaO含有体の間を通過することによつて脱酸生成
物であるAl2O3と反応し、CaO−Al2O3系低融物
としてモールド内に浮上させることができて、鋼
塊中の非金属介在物の減少をはかれるものであ
る。Effects According to the present invention, the molten steel flowing out of the immersion nozzle can be rectified by the slightly elongated discharge hole protruding laterally, and the molten steel flow can be made mainly of CaO.
By passing between the CaO-containing bodies, it reacts with Al 2 O 3 , which is a deoxidation product, and can be floated into the mold as a CaO-Al 2 O 3- based low-melting substance, which is then absorbed into the steel ingot. This is intended to reduce non-metallic inclusions.
実施例 以下、本考案を実施例にもとづいて説明する。Example The present invention will be explained below based on examples.
第１図、第２図は、本考案の一実施例である。
浸漬ノズル１は、第１図のように中央の溶鋼を注
するための注入孔２をほぼ貫通状態としたやや細
長状の円筒のもので、その上端部の膨出部３を連
続鋳造装置のタンデイツシユ（図示せず）の底部
に取着し、下端部に図のように注入孔２を逆Ｙ字
状に分岐して開口した吐出孔４をやや長目にスラ
ブ形成の長辺方向の両側方にそれぞれ浸漬ノズル
本体５と一体的に突設して、タンデイツシユから
モールド（図示せず）へ所要の溶鋼を注入できる
ようにしている。そして、この吐出孔４には、第
１図、第２図のように縦横にそれぞれ所定数の小
径の挿入孔６を開口していて、CaOを主成分とす
る棒状のCaO含有体７を上記挿入孔６にそれぞれ
挿入してモルタル８等で接合し、吐出孔４部に
CaO含有体７を十字状に取着して溶鋼中の脱酸生
成物であるAl2O3と反応させ、CaO−Al2O3系低
融物としてモールド内に浮上させるようにしてい
る。上記浸漬ノズル本体５は、たとえばアルミ
ナ、黒鉛、溶融石英、炭化珪素、珪素、耐火粘土
等の粉末を配合し、バインダーとしてレゾール型
のフエノールレジンを添加して混練後、アイソス
タテイツクプレスで加圧成形し、還元焼成して仕
上加工を行つて製品化しているものである。ま
た、CaOを主成分とするCaO含有体７は、ライム
クリンカー、マグネシアクリンカー、ノボラツク
型の粉末フエノールレジンにエチレングリコール
を加えて混練後、油圧プレスで加圧して所定の角
柱や円柱の棒状体とし、焼成して、上記のように
浸漬ノズル１の吐出孔４部に装着して形成してい
るものである。 FIGS. 1 and 2 show an embodiment of the present invention.
As shown in Fig. 1, the immersion nozzle 1 is a slightly elongated cylinder with an injection hole 2 in the center almost penetrating, and the bulge 3 at its upper end is connected to the continuous casting machine. It is attached to the bottom of a tundish (not shown), and the injection hole 2 is branched into an inverted Y shape at the lower end as shown in the figure. The immersion nozzle body 5 is provided integrally with the immersion nozzle body 5, respectively, so that the required amount of molten steel can be injected from the tundish into a mold (not shown). The discharge hole 4 has a predetermined number of small-diameter insertion holes 6 opened vertically and horizontally, respectively, as shown in FIGS. Insert each into the insertion holes 6, join with mortar 8, etc., and insert into the 4 parts of the discharge hole.
The CaO-containing body 7 is attached in a cross shape and reacts with Al 2 O 3 which is a deoxidation product in the molten steel, so that it floats in the mold as a CaO-Al 2 O 3 based low melting substance. The immersion nozzle body 5 is made by blending powders such as alumina, graphite, fused silica, silicon carbide, silicon, fireclay, etc., adding resol type phenol resin as a binder, kneading, and then pressurizing with an isostatic press. It is manufactured by molding, reduction firing, and finishing processing. In addition, the CaO-containing body 7 whose main component is CaO is made by adding ethylene glycol to lime clinker, magnesia clinker, or novolac-type powdered phenol resin, kneading the mixture, and pressurizing it with a hydraulic press to form a predetermined prismatic or cylindrical rod-shaped body. , fired, and attached to the four discharge holes of the immersion nozzle 1 as described above.
使用例
本考案の具体的な使用結果は、次の通りであ
る。Usage Examples The specific results of using the present invention are as follows.
使用例 １
浸漬ノズル本体５の吐出孔４のほぼ中央部に
10.5mmの挿入孔６を各１個づつ直交状にダイヤモ
ンドドリルであけ、第１図、第２図のように10mm
径のCaO含有体７を十字状に各２本づつ挿入孔６
に差し込んで接合した浸漬ノズル１を、Ａ製鉄所
の連鋳設備のタンデイツシユに取り付け、800℃
に十分予熱した後に受鋼使用した。その件果、製
造した鋼塊中の主にAl2O3の非金属介在物は、約
15％減少していることが確認できた。Usage example 1 Almost in the center of the discharge hole 4 of the immersion nozzle body 5
Drill one 10.5 mm insertion hole 6 perpendicularly with a diamond drill, and make a 10 mm hole as shown in Figures 1 and 2.
Two CaO-containing bodies 7 of the same diameter are inserted into each insertion hole 6 in a cross shape.
The immersion nozzle 1, which was inserted into and connected to
The steel was used after being sufficiently preheated. As a result, the non-metallic inclusions, mainly Al 2 O 3 , in the produced steel ingot are approximately
A decrease of 15% was confirmed.
使用例 ２
使用例１と同様の浸漬ノズル本体５に第３図、
第４図のように吐出孔４部の内周部に半円弧状の
溝孔９をダイヤモンドドリルで穿孔し、この溝孔
９に断面が10×10mm角のCaO含有体７を十字状に
各４本づつ層状に差し込んで接合した浸漬ノズル
１を上記と同様にして使用した。その結果、製造
した鋼塊中の非金属介在物は、約20％減少してい
ることが確認できた。Usage Example 2 The same immersion nozzle body 5 as in Usage Example 1 is shown in Figure 3.
As shown in Fig. 4, a semicircular arc-shaped slot 9 is drilled in the inner circumference of the discharge hole 4 using a diamond drill, and each CaO-containing body 7 with a cross section of 10 x 10 mm is placed in the slot 9 in a cross shape. The immersion nozzles 1, in which four nozzles were inserted and joined in layers, were used in the same manner as described above. As a result, it was confirmed that non-metallic inclusions in the manufactured steel ingots were reduced by approximately 20%.
このように、浸漬ノズルに注入する溶鋼流を
CaO含有体の層状間に通すと、コロイド状の
Al2O3がCaO−Al2O3系の低融物に変わつてモー
ルド内に浮上し、上記のような良結果が得られる
もので、特にスラブ形成に好ましいものである。 In this way, the molten steel flow injected into the immersion nozzle is
When passed between the layers of a CaO-containing body, colloidal
Al 2 O 3 changes into a CaO-Al 2 O 3- based low-melting substance and floats inside the mold, yielding the above-mentioned good results, and is particularly preferable for slab formation.
以上の実施例では、CaO含有体を棒状として十
字状に配設したが、放射状や格子状等にも配設で
きるものであり、またCaO含有体を予め格子状、
メツシユ状や多数の貫通孔を穿設した筒状として
吐出孔に装着し、溶鋼を流通自在として非金属介
在物をモールド内に浮上して除去するようにもで
きるものである。 In the above embodiments, the CaO-containing bodies are arranged as rods in a cross shape, but they can also be arranged in a radial shape, a lattice shape, etc.
It can also be installed in a discharge hole in the form of a mesh or a cylinder with a large number of through holes, so that molten steel can flow freely and non-metallic inclusions can be floated into the mold and removed.
なお、CaO含有体は、吐出孔部に挿入孔や溝孔
を介して取着したが、ねじ込みやその他の適宜な
手段で取着することもでき、また必要に応じて吐
出孔部を浸漬ノズル本体とは別個に製作して、
CaO含有体を内装して螺着等によつて結合するよ
うにもでき、また吐出孔部は、上下方向に適宜に
傾けて突設することもでき、さらに本浸漬ノズル
はウエルタイプのものにも適用できるものであ
る。 Although the CaO-containing body was attached to the discharge hole through an insertion hole or a slot, it can also be attached by screwing or other appropriate means.If necessary, the CaO-containing body can be attached to the discharge hole through an immersion nozzle. Manufactured separately from the main body,
A CaO-containing body can be installed inside and connected by screwing, etc., and the discharge hole can be tilted upward and downward as appropriate and protrude.Furthermore, this immersion nozzle can be a well type. It is also applicable.
上記の浸漬ノズルは、タンデイツシユについて
説明したが、取鍋等の他の溶融金属容器について
も同様に適用できるものである。 Although the above-mentioned immersion nozzle has been described with respect to a tundish, it can be similarly applied to other molten metal containers such as ladles.
考案の効果
以上のように本考案にあつては、浸漬ノズルを
流出する溶鋼を整流化できてモールドパウダーの
巻き込みの防止がはかれるとともに、溶鋼中の脱
酸化生成物であるAl2O3と反応してCaO−Al2O3
系低融物をモールド内に浮上させることができ、
鋼塊中の非金属物の除去を一段とはかれて高品質
の鋼片を製造できるものである。Effects of the invention As described above, with the present invention, the molten steel flowing out of the immersion nozzle can be rectified, preventing the mold powder from being drawn in, and reacting with Al 2 O 3 , which is a deoxidation product in the molten steel. CaO−Al 2 O 3
The low-melting material can be floated inside the mold,
By further removing non-metallic substances from the steel ingot, high-quality steel slabs can be manufactured.
第１図は本考案の一実施例の正断面図、第２図
は同上の吐出孔部の側断面図、第３図、第４図は
同上の他の実施例の吐出孔部の正断面図および側
断面図である。
１……浸漬ノズル、４……吐出孔、７……CaO
含有体。
Fig. 1 is a front sectional view of one embodiment of the present invention, Fig. 2 is a side sectional view of the discharge hole portion of the same as above, and Figs. 3 and 4 are front cross sections of the discharge hole portion of another embodiment of the same as above. FIG. 3 is a diagram and a side sectional view. 1...Immersion nozzle, 4...Discharge hole, 7...CaO
inclusion body.
Claims (1)
鋼を鋳造するための浸漬ノズルの吐出孔部を側
方にやや長目に突出して形成し、この吐出孔部
にCaOを主成分とした格子状、棒状等のCaO含
有体を取着したことを特徴とする鋳造用の浸漬
ノズル。 (2) 吐出孔部をスラブ形成の長辺方向に突出させ
て形成したものである実用新案登録請求の範囲
第１項記載の鋳造用の浸漬ノズル。[Scope of Claim for Utility Model Registration] (1) The discharge hole of a submerged nozzle for casting clean steel by attaching it to a tundish for continuous casting, etc. is formed to protrude slightly laterally, and this discharge hole An immersion nozzle for casting, characterized in that a lattice-shaped, rod-shaped, etc. CaO-containing body containing CaO as a main component is attached to the part. (2) The immersion nozzle for casting according to claim 1, wherein the discharge hole is formed so as to protrude in the long side direction of the slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17987286U JPH0320035Y2 (en) | 1986-11-21 | 1986-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17987286U JPH0320035Y2 (en) | 1986-11-21 | 1986-11-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6385358U JPS6385358U (en) | 1988-06-03 |
| JPH0320035Y2 true JPH0320035Y2 (en) | 1991-04-30 |
Family
ID=31123320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17987286U Expired JPH0320035Y2 (en) | 1986-11-21 | 1986-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320035Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4216642B2 (en) * | 2003-05-20 | 2009-01-28 | 新日本製鐵株式会社 | Immersion nozzle and continuous casting method using the same |
-
1986
- 1986-11-21 JP JP17987286U patent/JPH0320035Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6385358U (en) | 1988-06-03 |
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