JPS6313649A - Production of nozzle for continuous casting - Google Patents
Production of nozzle for continuous castingInfo
- Publication number
- JPS6313649A JPS6313649A JP15676086A JP15676086A JPS6313649A JP S6313649 A JPS6313649 A JP S6313649A JP 15676086 A JP15676086 A JP 15676086A JP 15676086 A JP15676086 A JP 15676086A JP S6313649 A JPS6313649 A JP S6313649A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- nozzle
- insulating layer
- forming
- continuous 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.)
- Granted
Links
- 238000009749 continuous casting Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- -1 B. Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (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）
この発明は、溶融金属、特に鋼の連続鋳造に用いられる
断熱性を向上させる連続鋳造用ノズルの製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a continuous casting nozzle that improves the heat insulation properties used in continuous casting of molten metal, particularly steel.
（従来の技術）
従来、鋼の連続Ｕ進用ノズル、例えばタンディツシュ内
セットノズルや浸漬ノズルなどにおいては、カーボンを
含有する材質から成っているため、鋼の鋳造中に外部か
らの冷却が大きく、これらノズル内部での溶鋼の冷却固
化に伴なう閉塞がしばしば発生することがあった。(Prior art) Conventionally, nozzles for continuous U-advance of steel, such as tundish set nozzles and immersed nozzles, are made of materials containing carbon, so cooling from the outside is large during steel casting. Blockage often occurred as the molten steel cooled and solidified inside these nozzles.
そして今まではこの問題に対しては、シ゛）連続鋳造用
ノズル（以下ノズルと呼ぶ）の外側を石綿状などの断熱
材で被う方法が採られていたが、ノズルの形状、特にタ
ンディツシュ内セットノズルでは、この方法が採れず、
断熱が不充分であシ、また浸漬ノズルにおいても環境上
、゛好ましくなかった。Until now, the solution to this problem was to cover the outside of the continuous casting nozzle (hereinafter referred to as the nozzle) with an insulating material such as asbestos, but the shape of the nozzle, especially the inside of the tundish This method cannot be used with a set nozzle,
The heat insulation was insufficient, and the submerged nozzle was also environmentally unfavorable.
そこで近時、ノズルの本体内部に断熱材を設ける方法が
採られるようになった。Therefore, in recent years, a method has been adopted in which a heat insulating material is provided inside the nozzle body.
これは、、第３．ｌ１図に示すように、円筒形状のドリ
ルの刃を用いて、予め成形しであるノズル本体／ａ上部
の側壁内に、同心的に円筒形状の空間を設け、そこに断
熱材Ｓを詰め込み、モルタル乙の充填で塞ぐ方法であっ
た。This is the third. As shown in Figure 11, a cylindrical space is created concentrically within the side wall of the upper part of the nozzle body/a, which has been previously formed, using a cylindrical drill blade, and a heat insulating material S is packed therein. The method was to fill it with mortar.
（発明が解決しようとする問題点）
しかしてこのような従来のドリルによる加工方法は、加
工に伴う欠損、空間部内側の破壊などが発生し易いため
、おのずと断熱材Ｓの充填される断熱部の長さなどに限
界制約があシ、円筒の部方向で７５０ｎ以下程度のもの
しか製作できなかった。(Problems to be Solved by the Invention) However, in the conventional machining method using a lever, chips and destruction of the inside of the space are likely to occur due to machining, so the heat insulating part filled with the heat insulating material S naturally There were limitations on the length, etc., and it was only possible to manufacture products of about 750 nm or less in the direction of the cylindrical part.
また断熱材３の充填後のモルタル乙による修正部がノズ
ルの上部ソケット部の平滑性を欠くなどの問題があった
。Further, there was a problem in that the repaired portion using the mortar B after filling the heat insulating material 3 lacked smoothness of the upper socket portion of the nozzle.
（問題点を解決するための手段）
この発明は、従来の切削加工による方法ではなく、予め
ノズルの成形時に、所定の形状の断熱材成形体を所定の
位置に埋設して成形することによる製造方法で、パラフ
ィンが含浸された断熱材成形体を用いたことが特徴であ
る１゜
（作用）
先ずパラフィン含浸断熱材成形体を作るには、予めでき
ている石綿状成形体を３０−１０００に加熱して着き、
７１０８０位で溶融させた固形パラフィン浴に数秒間浸
漬させて石綿の隙間に完全にパラフィンを行きわたらせ
る。３これを浴から取シ上げ、表面についた必要具」二
のパラフィンを流し夫。(Means for Solving the Problems) The present invention is manufactured by embedding a heat insulating material molded body of a predetermined shape in a predetermined position when molding the nozzle in advance, instead of using the conventional cutting method. The method is characterized in that it uses a paraffin-impregnated insulation molded body. Arrive heated,
The paraffin is immersed for several seconds in a bath of solid paraffin melted at about 71,080 degrees to completely spread the paraffin into the gaps between the asbestos. 3. Take it out of the bath, wash away the paraffin that is on the surface and wash it off.
る。これを室温中に放置して含浸されたパラフィンを完
全に固化させるのである。Ru. This is left at room temperature to allow the impregnated paraffin to completely solidify.
そして断熱４Ａ成形体には、パラフィンが含浸されてい
るので、ノズルの加圧成形時にほとんど圧縮されること
なく、原形を保つ、そして次の焼成過程において含浸さ
れたパラフィンは、流出揮発して除去され、断熱材の状
態は、パラフィン含浸される前の状態に戻される。Since the heat-insulating 4A molded body is impregnated with paraffin, it is hardly compressed during nozzle pressure molding and maintains its original shape. During the next firing process, the impregnated paraffin flows out and is removed by volatilization. The condition of the insulation material is returned to the state before it was impregnated with paraffin.
なお断熱層がよシ長く必要な場合には、断熱材成形体の
一部に通孔を設け、ノズル内に設けられた断熱体層の外
側と内側との間につなぎ部を作って強度を保持すること
ができる。If the heat insulating layer is required to be longer, a hole may be made in a part of the heat insulating material molded body to create a joint between the outside and inside of the heat insulating layer provided inside the nozzle to increase the strength. can be retained.
次にこの発明の実施例を図面節１，２図に基づき説明す
る。Next, an embodiment of the present invention will be described based on FIGS. 1 and 2 of the drawing section.
先ずノズル本体／側壁内に、嵩比重で０．２３〜ｏ、
３０ ｇｍｓ 、熱伝導率で０，７２ Ｋｔａｌ／ｎｈ
’ｏｃ ＩＯｄ”Ｏ）＋θ／ ｌ Ｋ”’／ｍｈＯｏ＜
／ ００００ｏ ） 、成分でｋｌ、 ｏ３ｊ／％、
５ｉｎ２１Ｉ９％から成るセラミック繊維の集合体から
成る断熱材成形体にパラフィンを含浸して作った断熱材
成形体２を埋設してラバープレスで成形した。そしてこ
れをコークスプリーズ中の非酸化性雰囲気で焼成して断
熱層３を有したノズルを得た。なおｔは断熱層３の内と
外とのつなぎ部分と成る通孔である。First, in the nozzle body/side wall, the bulk specific gravity is 0.23~0,
30 gms, thermal conductivity 0,72 Ktal/nh
'oc IOd"O)+θ/ l K"'/mhOo<
/ 0000o), component kl, o3j/%,
A heat insulating material molded body 2 made by impregnating paraffin into a heat insulating material molded body made of an aggregate of ceramic fibers consisting of 5 in 21 I 9% was embedded and molded using a rubber press. Then, this was fired in a non-oxidizing atmosphere in a coke pleat to obtain a nozzle having a heat insulating layer 3. Note that t is a through hole that connects the inside and outside of the heat insulating layer 3.
（発明の効果）
この発明にＪ：って、断熱層を配置したい所望位置に配
することができ、またより長尺の断熱層を有したノズル
を比較的自由に製造できるようになった。また従来のド
リルによる加工、断熱材詰め込みなどの工程を省くこと
ができ、作業能率の向上が得られると共に断熱層が完全
に外部から隠蔽されているため、ソケット部の平滑性も
保持され、かつノズルのシール性の問題も解消した。(Effects of the Invention) According to the present invention, the heat insulating layer can be placed at a desired position, and a nozzle having a longer heat insulating layer can be manufactured relatively freely. In addition, it is possible to omit the conventional processes such as machining with a drill and packing insulation material, improving work efficiency, and since the insulation layer is completely hidden from the outside, the smoothness of the socket part is maintained. The problem of nozzle sealing was also resolved.
Ｋ製鉄所のプルーム連続鋳造において、浸漬ノズルに厚
さ！； ’ｔ’ｔ ｒ ｆ’ｈ長３００ ｍの断熱層を
、この発明に従って設けたものを実際に使用した所、鋼
の凝固点によシ近い温度の低温連続鋳造でも＃Ｉ凝固に
よる閉塞も起こらず、約７ ｏｏｏ分の長時間に亘る安
定した鋳造に用いることができた。The thickness of the immersion nozzle in plume continuous casting at K Steel Works! When a heat insulating layer with a length of 300 m provided according to the present invention was actually used, blockage due to #I solidification did not occur even during low-temperature continuous casting at a temperature close to the freezing point of steel. First, it could be used for stable casting for a long time of about 7 ooo minutes.
第１図はこの発明の実施例によったノズルの縦断面図、
第２図は同断熱材成形体の斜視図、第３図は従来の加工
状態を示した縦断面図、第１図は同ノズルの縦断面図で
ある。
／、／ａ、、ノズル本体、２１．断熱材成形体、３１．
断熱層、４１１通孔、タ、−断熱材、乙。
、モルタル、
特許出願人 明智セラミックス株式会社第１１！１
第３１１１
第２図
第４図FIG. 1 is a longitudinal sectional view of a nozzle according to an embodiment of the invention;
FIG. 2 is a perspective view of the heat insulating material molded body, FIG. 3 is a vertical cross-sectional view showing a conventional processing state, and FIG. 1 is a vertical cross-sectional view of the nozzle. /, /a,, nozzle body, 21. Heat insulating material molded body, 31.
Heat insulation layer, 411 hole, T, -insulation material, B. , mortar, Patent applicant Akechi Ceramics Co., Ltd. No. 11!1 No. 3111 Fig. 2 Fig. 4
Claims (1)
浸された断熱材成形体を埋設して成形し、焼成すること
を特徴とする連続鋳造用ノズルの製造方法。A method for manufacturing a continuous casting nozzle, which comprises embedding a paraffin-impregnated heat insulating molded body inside the nozzle body of the continuous casting nozzle, molding and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15676086A JPS6313649A (en) | 1986-07-03 | 1986-07-03 | Production of nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15676086A JPS6313649A (en) | 1986-07-03 | 1986-07-03 | Production of nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6313649A true JPS6313649A (en) | 1988-01-20 |
| JPS6352985B2 JPS6352985B2 (en) | 1988-10-20 |
Family
ID=15634721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15676086A Granted JPS6313649A (en) | 1986-07-03 | 1986-07-03 | Production of nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6313649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284468A (en) * | 1988-05-11 | 1989-11-15 | Sumitomo Metal Ind Ltd | Submerged nozzle for continuous casting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0365883U (en) * | 1989-10-30 | 1991-06-26 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927727A (en) * | 1972-06-29 | 1974-03-12 | ||
| JPS49103829A (en) * | 1973-02-08 | 1974-10-01 | ||
| JPS5023333A (en) * | 1973-07-04 | 1975-03-13 | ||
| JPS5326206A (en) * | 1976-08-23 | 1978-03-10 | Mitsubishi Electric Corp | Starting method of ditch type induction furnace |
| JPS5466330A (en) * | 1977-11-06 | 1979-05-28 | Nippon Crucible Co | Production of dipping nozzle for continuous casting |
| JPS54152624A (en) * | 1978-05-20 | 1979-12-01 | Leco Corp | Nozzle and method of making same |
| JPS5762857A (en) * | 1980-09-29 | 1982-04-16 | Kurosaki Refract Co Ltd | Production of nozzle for casting having slit |
| JPS5935069A (en) * | 1982-08-23 | 1984-02-25 | 川崎製鉄株式会社 | Manufacture of carbon-containing refractories |
| JPS6011348A (en) * | 1983-06-20 | 1985-01-21 | ソシエテ・ナシオナ−ル・アンデユストリエル・アエロスパシイアル | Refractory composite material reinforced by refractory fiberand manufacture thereof |
| JPS61139433A (en) * | 1984-12-11 | 1986-06-26 | ニチアス株式会社 | Heat-insulating pipe body and manufacture thereof |
-
1986
- 1986-07-03 JP JP15676086A patent/JPS6313649A/en active Granted
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927727A (en) * | 1972-06-29 | 1974-03-12 | ||
| JPS49103829A (en) * | 1973-02-08 | 1974-10-01 | ||
| JPS5023333A (en) * | 1973-07-04 | 1975-03-13 | ||
| JPS5326206A (en) * | 1976-08-23 | 1978-03-10 | Mitsubishi Electric Corp | Starting method of ditch type induction furnace |
| JPS5466330A (en) * | 1977-11-06 | 1979-05-28 | Nippon Crucible Co | Production of dipping nozzle for continuous casting |
| JPS54152624A (en) * | 1978-05-20 | 1979-12-01 | Leco Corp | Nozzle and method of making same |
| JPS5762857A (en) * | 1980-09-29 | 1982-04-16 | Kurosaki Refract Co Ltd | Production of nozzle for casting having slit |
| JPS5935069A (en) * | 1982-08-23 | 1984-02-25 | 川崎製鉄株式会社 | Manufacture of carbon-containing refractories |
| JPS6011348A (en) * | 1983-06-20 | 1985-01-21 | ソシエテ・ナシオナ−ル・アンデユストリエル・アエロスパシイアル | Refractory composite material reinforced by refractory fiberand manufacture thereof |
| JPS61139433A (en) * | 1984-12-11 | 1986-06-26 | ニチアス株式会社 | Heat-insulating pipe body and manufacture thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284468A (en) * | 1988-05-11 | 1989-11-15 | Sumitomo Metal Ind Ltd | Submerged nozzle for continuous casting |
| JPH0464781B2 (en) * | 1988-05-11 | 1992-10-16 | Sumitomo Metal Ind |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6352985B2 (en) | 1988-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |