JPH08232011A - Lance pipe for gas and powder injection - Google Patents
Lance pipe for gas and powder injectionInfo
- Publication number
- JPH08232011A JPH08232011A JP6186595A JP6186595A JPH08232011A JP H08232011 A JPH08232011 A JP H08232011A JP 6186595 A JP6186595 A JP 6186595A JP 6186595 A JP6186595 A JP 6186595A JP H08232011 A JPH08232011 A JP H08232011A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- refractory
- gas
- lance pipe
- slag line
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
(57)【要約】
【目的】 スラグライン部Ａの溶損が小さく、ガス導入
管の溶断あるいはガス洩れがない耐用寿命の優れたガス
吹込み用ランスパイプを提供するにある。
【構成】 スラグライン部Ａを一体物又は数分割に分割
された上端と下端を外周に対して斜めに形成し、定形耐
火物固定用金物３が上下に配設され、スラグライン部Ａ
の定形耐火物４が外周に脱落することのないように芯金
１に溶接固定されたことを特徴としている。
【効果】 定形耐火物は亀裂もなく、溶損も少ないた
め、芯金兼ガス導入管が溶断又は破裂することもなく、
耐用寿命の向上に寄与できる。(57) [Summary] [Purpose] To provide a gas injection lance pipe having a small slag line portion A, which is free from melting and gas leakage of the gas introduction pipe and has a long service life. [Structure] A slag line portion A is formed integrally or is divided into several parts, and an upper end and a lower end thereof are formed obliquely with respect to the outer circumference, and fixed refractory-fixing hardware 3 is arranged vertically.
The fixed refractory 4 is fixed to the core metal 1 by welding so as not to fall off to the outer periphery. [Effect] Since the fixed-form refractory has no cracks and little melting loss, the core metal / gas inlet pipe does not melt or burst.
It can contribute to the improvement of service life.
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶銑または溶鋼中に不活
性ガスまたは不活性ガスと粉粒状精錬剤との混合物を吹
込むためのガスおよび粉体吹込み用ランスパイプに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas and a powder injection lance pipe for injecting an inert gas or a mixture of an inert gas and a granular refining agent into hot metal or molten steel.
【０００２】[0002]
【従来の技術】従来、使用されてきたこの種のランスパ
イプ構造について図１を用いて概略説明する。通常、ラ
ンスパイプは取鍋等の容器内溶融金属浴中にガス又はガ
スと粉末の混合物（以下単にガスという）を吹込む際に
ノズル孔５よりのガス噴出時の脈動、あるいは噴出後に
生ずる溶融金属の乱還流により、ランスパイプは極めて
大きな外力を受ける。そこで、この外力に耐えるために
ガス導入管１を太くし、場合によってはリブを付ける等
の補強をし、しかる後に適宜耐火物ライニングの補強ス
タッド６を溶接し、芯金の外周に耐火キャスタブルを施
工して鋳込み成形体２としている。ランスパイプは使用
中、特にスラグによる浸食が大きいため、特にスラグラ
イン部Ａは鋳込み成形体２の外径をメタルライン部Ｂに
比べ大きく構成し、耐火物の厚みを大きくとっている。
又スラグライン部Ａの鋳込み成形体２の材質を、スラグ
に対して耐食性の高い耐火材料に変更して部分的に強化
した構成の鋳込み成形体２のランスパイプが一般的であ
る。2. Description of the Related Art A lance pipe structure of this type which has been conventionally used will be briefly described with reference to FIG. Normally, a lance pipe is pulsating at the time of ejecting gas from the nozzle hole 5 when blowing gas or a mixture of gas and powder (hereinafter simply referred to as gas) into a molten metal bath in a container such as a ladle, or melting that occurs after ejection. Due to the turbulent circulation of metal, the lance pipe receives an extremely large external force. Therefore, in order to withstand this external force, the gas introduction pipe 1 is thickened, and in some cases, reinforcement such as ribs is added. After that, the reinforcement studs 6 of the refractory lining are appropriately welded, and the refractory castable is provided on the outer periphery of the core metal. The cast molded body 2 is constructed. Since the lance pipe is particularly corroded by slag during use, the slag line portion A has a larger outer diameter than the metal line portion B particularly in the slag line portion A, and the refractory has a large thickness.
Further, a lance pipe of the cast-molded body 2 in which the material of the cast-molded body 2 in the slag line portion A is partially reinforced by changing the material of the slag to a refractory material having high corrosion resistance is generally used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら従来の構
造のガス吹込み用ランスパイプは、まだスラグライン部
Ａの溶損が大きくガス導入管１の溶断、あるいは溶損部
からのガス洩れ等によりランスパイプが使用不能とな
り、メタルライン部Ｂの耐火物（鋳込み成形体部）の残
厚がありながら、ランスパイプの寿命を律速していた。However, in the gas injection lance pipe of the conventional structure, the slag line portion A still has a large melting loss, and the lance pipe is broken due to the melting or the gas leakage from the melting portion. The pipe became unusable and the life of the lance pipe was limited while the refractory (cast molded body) in the metal line portion B remained.
【０００４】[0004]
【課題を解決するための手段】本発明は、従来の問題点
を解決するためになされたもので、従来のガス吹込み用
ランスパイプのスラグライン部Ａに対スラグ耐食性の高
い、アルミナ質材，アルミナ−マグネシア質材，アルミ
ナ−スピネル質材，アルミナ−カーボン質材，アルミナ
−マグネシア−カーボン質材，アルミナ−スピネル−カ
ーボン質材，マグネシア−カーボン質材，炭化珪素質材
等の定形耐火物４を配することを特徴とするガス吹込み
用ランスパイプである。この定形耐火物４は、スラグラ
イン部Ａを一体物又は数分割に分割された上端と下端を
外周に対して斜めに形成し、定形耐火物固定用金物３が
上下に配設され、スラグライン部Ａの定形耐火物４が外
周に脱落することのない様に芯金１に溶接固定されてい
ることを特徴としている。SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and is an alumina material having a high slag corrosion resistance in the slag line portion A of the conventional gas injection lance pipe. , Refractory materials such as alumina-magnesia material, alumina-spinel material, alumina-carbon material, alumina-magnesia-carbon material, alumina-spinel-carbon material, magnesia-carbon material, silicon carbide material 4 is a gas injection lance pipe. This fixed refractory 4 has a slag line part A formed integrally or divided into a plurality of parts so that the upper end and the lower end are formed obliquely with respect to the outer periphery, and the fixed refractory fixing metal parts 3 are arranged vertically to form a slag line. It is characterized in that the fixed refractory 4 of the portion A is welded and fixed to the core metal 1 so as not to fall off to the outer periphery.
【０００５】[0005]
【実施例】本発明の実施例について詳細に説明する。本
発明の実施例を図２に示す。スラグライン部Ａに埋設す
る定形耐火物４は図３の拡大図の様に上端と下端を斜め
構造としたあらかじめＨＩＰまたはプレキャストとして
成形した円筒状耐火物であり、Ｎ社のガス吹込み用ラン
スパイプのスラグライン部Ａに外径４５０ｍｍ高さ５０
０ｍｍの形状で芯金兼ガス導入管１のスラグライン部Ａ
に定形耐火物固定用金物３によって、定形耐火物４の
上，下端の斜め構造にした部分の上，下をガス導入管１
に溶接固定することによって、定形耐火物４が外周に脱
落することを防ぎ、その後メタルライン部Ｂおよびスプ
ラッシュ防止部の外径３００ｍｍを鋳込み成形体２によ
ってガス吹込み用ランスパイプを製作した。なお、定形
耐火物部分４が一体物形状４ａの場合と分割タイプ形状
４ｂの場合とがある。EXAMPLES Examples of the present invention will be described in detail. An embodiment of the present invention is shown in FIG. The fixed refractory 4 to be buried in the slag line A is a cylindrical refractory preformed by HIP or precast with an oblique structure at the upper and lower ends as shown in the enlarged view of FIG. Outer diameter 450 mm and height 50 at the slag line part A of the pipe
The slag line part A of the core metal and gas introduction pipe 1 with a shape of 0 mm
With the fixed refractory fixing metal 3, the upper and lower ends of the fixed refractory 4 are diagonally structured, and the gas introduction pipe 1 is provided.
The fixed refractory 4 was prevented from falling off to the outer periphery by welding and fixing it to the outer periphery, and then the metal line portion B and the splash prevention portion having an outer diameter of 300 mm were manufactured by the cast molding 2 to produce a gas injection lance pipe. There are cases where the fixed refractory portion 4 has a one-piece shape 4a and a divided type shape 4b.
【０００６】[0006]
【発明の効果】本発明によるガスおよび粉体吹込み用ラ
ンスパイプをＮ社、取鍋精錬において使用した結果、ス
ラグライン部Ａの溶損は従来品に比べ７０％程度とな
り、定形耐火物は亀裂もなく、溶損も少ないため、芯金
兼ガス導入管が溶断または破裂することもなく、平均寿
命は従来品に比べ１．８倍の耐用を得ることが可能とな
った。As a result of using the lance pipe for blowing gas and powder according to the present invention in ladle refining at Company N, the slag line portion A has a melting loss of about 70% compared to the conventional product, and the standard refractory material is Since there is no crack and there is little melting loss, the core metal / gas inlet tube does not melt or rupture, and the average life can be 1.8 times longer than that of the conventional product.
【図１】従来のガス吹込み用ランスパイプの縦断面図で
ある。FIG. 1 is a vertical cross-sectional view of a conventional gas injection lance pipe.
【図２】本発明によるガス吹込み用ランスパイプの縦断
面図である。FIG. 2 is a vertical sectional view of a gas injection lance pipe according to the present invention.
【図３】本発明による定形耐火物部分の一体物形状の場
合の斜視図である。FIG. 3 is a perspective view of a fixed refractory portion according to the present invention in the case of an integral shape.
【図４】本発明による定形耐火物部分の分割タイプ形状
の場合の斜視図である。FIG. 4 is a perspective view in the case of a split type shape of a regular refractory portion according to the present invention.
１ 芯金兼ガス及び粉体導入管 ２ 鋳込み成形体 ３ 定形耐火物固定金物 ４ 定形耐火物 ４ａ 一体物定形耐火物 ４ｂ 分割タイプ定形耐火物 ５ ノズル孔 ６ 補強スタッド Ａ スラグライン部 Ｂ メタルライン部 1 core metal and gas and powder introduction pipe 2 cast body 3 fixed refractory fixed metal 4 fixed refractory 4a integral fixed refractory 4b split type fixed refractory 5 nozzle hole 6 reinforced stud A slag line B metal line
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 毅 岐阜県多治見市市之倉町２−297 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takeshi Yoshida 2-297 Nokuramachi, Tajimi City, Gifu Prefecture
Claims (2)
てなるガスおよび粉体吹込み用ランスパイプにおいて、
定形耐火物を定形耐火物固定用金物によって、芯金、兼
ガス導入管に溶接固定することを特徴とするガスおよび
粉体吹込み用ランスパイプ。1. A lance pipe for blowing gas and powder, wherein a fixed refractory is buried in the slag line portion A,
A lance pipe for blowing gas and powder, characterized in that a fixed refractory is welded and fixed to a core metal and a gas introduction pipe by a fixed refractory fixing metal.
物によって埋設される定形耐火物の形状は一体物又は数
分割に分割された定形耐火物で構成された円筒状耐火物
であり、その上端及び下端を外周に対して斜めに形成さ
れ、定形耐火物固定金物がその上下に配設され、スラグ
ライン部Ａの定形耐火物が外周に脱落することのない様
に芯金に溶接固定されていることを特徴とする請求項１
に記載のガスおよび粉体吹込み用ランスパイプ。2. The shape of the fixed refractory to be embedded in the slag line portion A by the fixed refractory fixing metal is a cylindrical refractory formed of an integral piece or a divided piece of the fixed refractory. The upper and lower ends are formed obliquely with respect to the outer circumference, the fixed refractory fixed metal fittings are arranged above and below, and the fixed refractory material of the slag line part A is welded and fixed to the core metal so as not to fall off to the outer circumference. Claim 1 characterized by the above.
Lance pipe for blowing gas and powder according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06186595A JP3688003B2 (en) | 1995-02-23 | 1995-02-23 | Lance pipe for gas and powder injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06186595A JP3688003B2 (en) | 1995-02-23 | 1995-02-23 | Lance pipe for gas and powder injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08232011A true JPH08232011A (en) | 1996-09-10 |
| JP3688003B2 JP3688003B2 (en) | 2005-08-24 |
Family
ID=13183452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06186595A Expired - Fee Related JP3688003B2 (en) | 1995-02-23 | 1995-02-23 | Lance pipe for gas and powder injection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3688003B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014218712A (en) * | 2013-05-09 | 2014-11-20 | 新日鐵住金株式会社 | Lance pipe |
-
1995
- 1995-02-23 JP JP06186595A patent/JP3688003B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014218712A (en) * | 2013-05-09 | 2014-11-20 | 新日鐵住金株式会社 | Lance pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3688003B2 (en) | 2005-08-24 |
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