JPS64634B2 - - Google Patents
Info
- Publication number
- JPS64634B2 JPS64634B2 JP1819882A JP1819882A JPS64634B2 JP S64634 B2 JPS64634 B2 JP S64634B2 JP 1819882 A JP1819882 A JP 1819882A JP 1819882 A JP1819882 A JP 1819882A JP S64634 B2 JPS64634 B2 JP S64634B2
- Authority
- JP
- Japan
- Prior art keywords
- formwork
- coating layer
- opening
- lance
- present
- 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
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
本発明は製鉄用の溶銑脱硫ランスや溶鋼温度調
整用ランス等のように溶融金属に浸漬して使用す
るガス吹込みランスに耐火材を施した溶融金属処
理用ガス吹込みランスの被覆層成形装置に関す
る。
従来から使用されているガス吹込みランスは被
覆層形成材料を充填することにより形成される
が、充填したのち、振動機を用いて振動したり、
棒状加振機を挿入し振動したりして充填をよくし
ようとしているのが一般にとられている方式であ
るが、このような振動充填手段では、型枠で粗粒
の分離が進行し、偏在するため、組織にムラが出
来易く、ランスが使用されたときに溶融金属によ
り侵蝕され易く、又、スポーリングを起して割れ
易いという欠点があつた。
本発明は、上記のような欠点を解消し、均質な
ランスパイプの被覆層形成を容易にしたもので、
本発明の被覆層成形装置の構成は前記特許請求の
範囲に明記したとおりである。
本発明方法の具体的数例を示す添付図面に基い
て詳細に説明する。
第１図及び第２図は本発明成形装置の横断面図
及び縦断面図であり、１は断面円形の横長の２分
割型型枠で、該型枠の軸方向に沿つて全長に亘つ
て上部に開口６を有し、下方端面に成形品の外周
曲率に等しい凹部を有する前記開口全長に圧入し
うる加圧具５とからなり、前記型枠１を振動テー
ブル７上に固定した、ランスパイプ被覆層成形装
置である。
本発明装置による被覆層の成形に当つては、ラ
ンスパイプの被覆層の外径及び長さに応じて製作
された型枠１の中央に、溶融金属処理用ガス導入
鋼鉄芯管２をセツトし、被覆層を形成するための
耐火材３を開口６から鋳込みにより振動をかけ乍
ら充填する。充填終了後、開口６から加圧具５を
油圧装置その他の方法により圧入する。加圧する
ことにより、耐火材料粒子間の接触が容易にな
り、組織が緻密となり、単に加振した場合と異な
り、均一な組織が得られ、耐スポーリング性も向
上することが認められる。
以上の成形法に用いる鋳込用耐火物は水分を３
〜10重量％、一般には4.5〜6.0重量％含有する湿
潤状の組成物である。
１例として、加圧しない場合と、加圧した場合
についての品質を表１に示す。
The present invention is a coating layer forming apparatus for a gas injection lance for processing molten metal, in which a refractory material is applied to a gas injection lance that is used by being immersed in molten metal, such as a hot metal desulfurization lance for iron manufacturing or a lance for adjusting the temperature of molten steel. Regarding. Conventionally used gas blowing lances are formed by filling the coating layer forming material, but after filling it, it is vibrated using a vibrator,
The commonly used method is to insert a rod-shaped vibrator and vibrate to improve the filling, but with such vibratory filling means, the separation of coarse particles progresses in the formwork, causing uneven distribution. As a result, the structure tends to be uneven, and when the lance is used, it is easily corroded by molten metal, and it is also prone to spalling and cracking. The present invention eliminates the above-mentioned drawbacks and facilitates the formation of a homogeneous lance pipe coating layer.
The structure of the coating layer forming apparatus of the present invention is as specified in the claims. DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be explained in detail with reference to the accompanying drawings showing several specific examples of the method of the present invention. 1 and 2 are a cross-sectional view and a vertical cross-sectional view of the molding apparatus of the present invention, in which 1 is a horizontally elongated two-part formwork with a circular cross section, and the formwork is formed along the entire length along the axial direction of the formwork. A lance, which has an opening 6 in its upper part and a pressurizing tool 5 which can be press-fitted into the entire length of the opening and has a recessed part equal to the outer circumferential curvature of the molded product in its lower end face, and the formwork 1 is fixed on a vibration table 7. This is a pipe coating layer forming device. When forming the coating layer using the apparatus of the present invention, a steel core tube 2 for introducing gas for molten metal processing is set in the center of a formwork 1 manufactured according to the outer diameter and length of the coating layer of the lance pipe. Then, the refractory material 3 for forming the coating layer is filled through the opening 6 by casting while applying vibration. After the filling is completed, the pressurizing tool 5 is press-fitted through the opening 6 using a hydraulic device or other method. It is recognized that by pressurizing, contact between particles of the refractory material becomes easier, the structure becomes denser, a uniform structure is obtained, and spalling resistance is improved, unlike when simply shaking. The refractory for casting used in the above forming method has a moisture content of 3
It is a wet composition containing ~10% by weight, typically 4.5-6.0% by weight. As an example, Table 1 shows the quality in the case of no pressurization and the case of pressurization.
【表】
上記の如く、本発明装置によればすべての点に
おいて品質の向上が認められた。[Table] As described above, with the apparatus of the present invention, improvement in quality was observed in all respects.
第１図及び第２図は本発明成形装置の一例を示
す横断面図及び縦断面図であり、図中、１は型
枠、２はガス吹込管、３は被覆耐火物、４は加圧
用シリンダー、５は加圧具、６は開口、７は振動
テーブルである。
1 and 2 are a cross-sectional view and a vertical cross-sectional view showing an example of the molding apparatus of the present invention, in which 1 is a formwork, 2 is a gas blowing pipe, 3 is a coated refractory, and 4 is for pressurization. 5 is a cylinder, 5 is a pressurizing tool, 6 is an opening, and 7 is a vibration table.
Claims (1)
軸方向に沿つて全長に亘つて上部に開口を有し、
下方端面に成形品の外周曲率に等しい凹部を有す
る前記開口全長に圧入しうる加圧具とからなり、
前記型枠を振動テーブル上に固定した、ランスパ
イプ被覆層成形装置。1 A horizontally long two-part formwork with a circular cross section, having an opening at the top along the entire length of the formwork,
a pressurizing tool that can be press-fitted into the entire length of the opening and has a concave portion on the lower end surface that is equal to the outer circumferential curvature of the molded product;
A lance pipe coating layer forming apparatus in which the formwork is fixed on a vibrating table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1819882A JPS58136977A (en) | 1982-02-09 | 1982-02-09 | Method of forming coating layer of lance pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1819882A JPS58136977A (en) | 1982-02-09 | 1982-02-09 | Method of forming coating layer of lance pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58136977A JPS58136977A (en) | 1983-08-15 |
| JPS64634B2 true JPS64634B2 (en) | 1989-01-09 |
Family
ID=11964927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1819882A Granted JPS58136977A (en) | 1982-02-09 | 1982-02-09 | Method of forming coating layer of lance pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58136977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0318238U (en) * | 1989-07-05 | 1991-02-22 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5227U (en) * | 1975-06-18 | 1977-01-05 |
-
1982
- 1982-02-09 JP JP1819882A patent/JPS58136977A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0318238U (en) * | 1989-07-05 | 1991-02-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58136977A (en) | 1983-08-15 |
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