JPS6115911A - Lance nozzle for blowing in converter - Google Patents

Lance nozzle for blowing in converter

Info

Publication number
JPS6115911A
JPS6115911A JP13606784A JP13606784A JPS6115911A JP S6115911 A JPS6115911 A JP S6115911A JP 13606784 A JP13606784 A JP 13606784A JP 13606784 A JP13606784 A JP 13606784A JP S6115911 A JPS6115911 A JP S6115911A
Authority
JP
Japan
Prior art keywords
nozzle
lance
oxygen
tip
cooling
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
Application number
JP13606784A
Other languages
Japanese (ja)
Inventor
Eizo Okazaki
岡崎　栄三
Kazuyoshi Inouchi
井内　和義
Hideo Kotani
小谷　英夫
Shigeru Enomoto
榎本　茂
Harunobu Ueno
上野　晴信
Mitsuo Okuzumi
奥住　光雄
Yasushi Muramatsu
村松　寧
Suekichi Aoki
青木　末吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GOTO GOKIN KK
Nippon Steel Corp
Original Assignee
GOTO GOKIN KK
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GOTO GOKIN KK, Nippon Steel Corp filed Critical GOTO GOKIN KK
Priority to JP13606784A priority Critical patent/JPS6115911A/en
Publication of JPS6115911A publication Critical patent/JPS6115911A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors

Abstract

PURPOSE:To prevent the melt fracture of the tip of a lance nozzle having a triply tubed structure by arranging plural water introducing holes for cooling along the outside of the tip of each oxygen nozzle so as to cool intensely the outside of the tip of the oxygen nozzle. CONSTITUTION:In a lance nozzle having a triply tubed structure, eight water introducing holes 6 for cooling are arranged along the outside of the tip 8 of each oxygen nozzle so as to cool intensely the outside of the tip 8 of the oxygen nozzle. The life of the lance nozzle is prolonged by 1.5-2 times the life of a conventional lance nozzle.

Description

【発明の詳細な説明】 （産業上の利用分野〕 本発明は、転炉吹錬用ランスノズルの構造に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a lance nozzle for converter blowing.

（従来の技術） 一般にランスノズルは、吹錬中飛散し付着した溶鋼と酸
素の反応熱、および溶鋼からの輻射熱の影響のため、酸
素ノズル先端部８（第７図）が溶損され、またこのため
に酸素ノズル形状が崩れ。(Prior art) In general, in lance nozzles, the oxygen nozzle tip 8 (Fig. 7) is melted and damaged due to the reaction heat between the molten steel and oxygen that are scattered and adhered during blowing, and the radiant heat from the molten steel. This causes the oxygen nozzle shape to collapse.

正常な送酸が行なえなくな、！ｌ）、操業に影響を及ば
ず。Normal oxygen delivery is no longer possible! l), without affecting operations.

而して、従来のランスノズルは第７図、第８図のように
三重管構造で、冷却水は第１１図に示すように内管２内
から給水され、冷却用導水口１０を通シ、外管３内を流
れて排水される。The conventional lance nozzle has a triple pipe structure as shown in FIGS. 7 and 8, and cooling water is supplied from inside the inner pipe 2 as shown in FIG. , flows through the outer tube 3 and is drained.

（発明が解決しようとする問題点） この形状のランスノズルにおいては、冷却用導水口ｌＯ
からの冷却水の流れでランスノズル全体の冷却を行なっ
ているため、冷却用導水口１０からの流速が速くなり、
第９図に示すように酸素ノズル先端前面部（ランスノズ
ルの中央部Ｃ側の部分ンの流れが酸素ノズル壁面に沿っ
て流れておらず、酸素ノズル後面部（ランスノズルの外
側の部分）は冷却水が滞流している。(Problem to be solved by the invention) In the lance nozzle of this shape, the cooling water inlet lO
Since the entire lance nozzle is cooled by the flow of cooling water from the
As shown in Figure 9, the flow at the front part of the oxygen nozzle tip (the part on the C side of the center part of the lance nozzle) does not flow along the oxygen nozzle wall, and the rear part of the oxygen nozzle (the outer part of the lance nozzle) Cooling water is stagnant.

まだ、酸素ノズル先端部８の溶損形態も、第１０図に示
すとおり酸素ノズル先端前面部１１、後面部１１′の溶
損が激しくなっておシ、この部分の冷却が不足している
のがわかる。However, as shown in Fig. 10, the shape of the oxygen nozzle tip 8 is severely eroded, and the front section 11 and rear section 11' of the oxygen nozzle tip are severely eroded, which may be due to insufficient cooling of these parts. I understand.

本発明は、ランスノズルの冷却用導水口を改良すること
によシ、酸素ノズルまわりの冷却を強化し、酸素ノズル
先端部８の溶損を防止しようとするものである。The present invention aims to strengthen cooling around the oxygen nozzle and prevent melting and damage of the oxygen nozzle tip 8 by improving the cooling water inlet of the lance nozzle.

（問題点を解決するための手段〉 本発明の要旨は、 Ａ・・・三重管構造のランスノズルにおいて、冷却用導
水口を酸素ノズル先端部の外周面に沿って複数個配設す
ることにより酸素ノズルまわりの冷却を強化したことを
特徴とする転炉吹錬用２ンスノノル、 Ｂ・・・三重管構造のランスノズルにおいて、冷却用導
水口を酸素ノズル先端部の外周面に沿って複数個配設す
ると共に受熱面への冷却用導水口を配設することによシ
酸素ノズルまわりおよび受熱面の冷却を強化したことを
特徴とする転炉吹錬用ランスノズル、および、 Ｃ・・・前記酸素ノズル先端部冷却用導水口が、酸素ノ
ズルの先端部の前後面部に、前面部は酸素ノズル円周方
向５°から３０°の範囲、後面部は酸素ノズル円周方向
３０°から１２００の範囲内に配設されている前記Ｂの
転炉吹錬用ランスノズル である。(Means for Solving the Problems) The gist of the present invention is as follows: A...In a lance nozzle with a triple pipe structure, by arranging a plurality of cooling water inlets along the outer peripheral surface of the oxygen nozzle tip. 2-sun nozzle for converter blowing characterized by enhanced cooling around the oxygen nozzle, B... A lance nozzle with triple pipe structure, with multiple cooling water inlets along the outer circumferential surface of the oxygen nozzle tip. A lance nozzle for converter blowing, characterized in that the cooling around the oxygen nozzle and the heat receiving surface is strengthened by arranging the cooling water inlet to the heat receiving surface, and C... The water inlet for cooling the tip of the oxygen nozzle is provided on the front and rear surfaces of the tip of the oxygen nozzle. This is the converter blowing lance nozzle of B, which is disposed within the range.

前記ランスノズルＡは第１図、第２図に示すように積極
的に酸素ノズル先端部８を冷却する冷却用導水口６ｆ−
酸素ノズル先端部８の外周面に沿って複数個設けたもの
である。As shown in FIGS. 1 and 2, the lance nozzle A has a cooling water inlet 6f- that actively cools the oxygen nozzle tip 8.
A plurality of them are provided along the outer peripheral surface of the oxygen nozzle tip 8.

例として今回設けた冷却用導水口６の大きさは、１つの
酸素ノズルにつき幅が８■長さが酸素ノズル円周方向約
３３°の角度を持ったものを８個設けた。As an example, the size of the cooling water inlets 6 provided this time is eight, each having a width of 8 mm and a length of about 33 degrees in the circumferential direction of the oxygen nozzle.

前記ランスノズルＢは前記ランスノズルＡを改良したも
のである。ランスノズルＡは、酸素ノズル先端部８の冷
却強化には効果が認められたが、受熱面９の部分に滞流
が発生し、この部分が溶損されるようになってしまった
。そこで、ランスノズル８は第３図、第４図に示すよう
にランスノズルＡに受熱面への冷却用導水口４を配設す
ることによってランスノズルＡで問題となっていた受熱
面の冷却を強化したものである。受熱面への冷却用導水
口４の大きさは、流れが認められる１０ｍ＋から、流量
）々う、ンスから４０簡の範囲で設定する。The lance nozzle B is an improved version of the lance nozzle A. Although the lance nozzle A was found to be effective in strengthening the cooling of the oxygen nozzle tip 8, stagnation occurred in the heat receiving surface 9, and this part became eroded. Therefore, the lance nozzle 8 solves the problem of cooling the heat receiving surface with the lance nozzle A by providing the lance nozzle A with a water inlet 4 for cooling the heat receiving surface as shown in FIGS. 3 and 4. It has been strengthened. The size of the cooling water inlet 4 to the heat-receiving surface is set within the range of 10 m+, where flow is recognized, to 40 m+, where the flow rate is recognized.

前記ランスノズルＣは第５図、第６図に示すように、酸
素ノズル先端部８において溶損の激しい部分である酸素
ノズル前面部および後面部にそれぞれ冷却用導水ロアお
よび５を配設し、更に受熱面への冷却用導水口４を配設
することによシ、酸素ノズルまわシおよび受熱面の冷却
を、強化したものである。後面部導水口５は導水口から
の流速を速くシ、なおかつ冷却範囲を広く設けることに
よシ、酸素ノズル後面の冷却を強化しようとするもので
あり、下限を効果が認められる長さ酸素ノズル円周方向
３０°から、上限°を中心部からの冷却水との干渉が発
生する直前の長さ酸素ノズル円周方向１２０°の範囲で
設ける。前面部導水ロアは、従来のランスノズルでは冷
却用導水口ｌＯからの流れで冷却していたため、前にも
述べたとおり、前面部は冷却水の流れが剥離しておシ、
これを解決するために前面部を専用に冷却する前面部導
水ロアを設けたものであシ、下限を冷却効果の表われ始
める長さ酸素ノズル円周方向５°から、上限を中心部と
の流れと干渉しない長さ酸素ノズル円周方向３０°の範
囲で設ける。受熱面導水口４は受熱−面の冷却を専用に
行うために設けたもので、下限を効果の表われる１　０
　ｍ　、上限を前面部導水ロアと後面部導水口５との流
量ノ々ランスを考慮して４０■の径の範囲で設ける。As shown in FIGS. 5 and 6, the lance nozzle C has a cooling water guide lower and 5 disposed at the front and rear surfaces of the oxygen nozzle, which are the parts that are subject to severe erosion at the oxygen nozzle tip 8, respectively. Furthermore, cooling of the oxygen nozzle and the heat receiving surface is strengthened by providing a cooling water inlet 4 to the heat receiving surface. The rear water inlet 5 is intended to strengthen the cooling of the rear face of the oxygen nozzle by increasing the flow velocity from the water inlet and providing a wide cooling range, and the lower limit is the length of the oxygen nozzle that is effective. From 30 degrees in the circumferential direction, the upper limit degree is set in a range of 120 degrees in the circumferential direction of the oxygen nozzle, which is the length immediately before interference with the cooling water from the center occurs. In the conventional lance nozzle, the lower front water guide was cooled by the flow from the cooling water inlet lO, so as mentioned earlier, the flow of cooling water separated at the front, causing the problem.
To solve this problem, we have installed a front water guide lower that exclusively cools the front part.The lower limit is set at 5° in the circumferential direction of the oxygen nozzle, at which the cooling effect begins to appear, and the upper limit is set at 5° in the circumferential direction of the oxygen nozzle. Provide the oxygen nozzle with a length that does not interfere with the flow within a range of 30° in the circumferential direction. The heat-receiving surface water inlet 4 is provided exclusively for cooling the heat-receiving surface, and the lower limit is set at 10 to 10 where the effect appears.
m, the upper limit is set within a diameter range of 40 cm, taking into account the flow rate between the front water guide lower and the rear water guide port 5.

例として、本発明のランスノズル゛Ｃについて可視化実
験等の諸検討を実施した結果、゛受熱面導水口４の径が
２０ｍ１前面部導水ロアが幅８閣、長さ３０°、後面部
導水口５が幅８１ｍ１長さ９０°が冷却効果、流量バラ
ンス、渦流、滞流の発生状況などから最も適切な大きさ
であった。As an example, as a result of conducting various studies such as visualization experiments on the lance nozzle C of the present invention, it was found that the diameter of the heat-receiving surface water inlet 4 is 20 m, the front water guide lower is 8 cm wide, the length is 30 degrees, and the rear water inlet is 20 m in diameter. 5 was found to have a width of 81 m and a length of 90°, which was the most appropriate size in terms of cooling effect, flow balance, vortex flow, and occurrence of stagnant flow.

（発明の作用） 本発明のランスノズルＡ、Ｂを使用した場合、酸素ノズ
ル外周に設けた冷却用導水口６、本発明のランスノズル
Ｃを使用した場合、前面部導水ロアと後面部導水口５か
らの冷却水の流れにより、冷却効果を向上させ、酸素ノ
ズル先、端部８の溶損を防市することが可能である。(Function of the invention) When the lance nozzles A and B of the present invention are used, the cooling water inlet 6 provided on the outer periphery of the oxygen nozzle, and when the lance nozzle C of the present invention is used, the front water guide lower and the rear water guide port are used. By the flow of cooling water from 5, it is possible to improve the cooling effect and prevent melting damage at the oxygen nozzle tip and end 8.

（発明の効果） 本発明のランスノズルについて実際にテストを実施した
ところ、従来のランスノズルの寿命に比べて、本発明の
ランスノズルＡ、Ｂについては約１．５倍、本発明のラ
ンスノズルＣについては約２倍と飛躍的に寿命を延ばす
ことができた。(Effects of the Invention) When the lance nozzle of the present invention was actually tested, it was found that the life of the lance nozzles A and B of the present invention was approximately 1.5 times longer than that of the conventional lance nozzle. For C, we were able to dramatically extend the lifespan by about twice as much.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明のランスノズルＮの断面図、第２図は第
１図のＸ−Ｘ矢視断面図、第３図は本発明のランスノズ
ルＢの断面図、第４図は第３図のＸ−Ｘ矢視断面図、第
５図は本発明のランスノズルＯの断面図、第６図は第５
図のＸ−Ｘ矢視断面図、第７図は従来のランスノズルの
断面図、第８図は第７図のＸ−Ｘ矢視断面図、第６図は
第８図Ａ−Ａ断面での冷却水の流動状況を示した図、第
１０図は酸素ノズルの溶損状況を示した図、第１１図は
ランス本体の断面図である。 ■・・・酸素管、２・・・内管、３・・・外管、４・・
・受熱面導水口、５・・・背画部導水口、６・・・酸素
ノズル外周導水口、７・・・前面部導水口、８・・・酸
素ノズル先端部、９・・・受熱面、１０・・・冷却用導
水口、１１．１１’・・・ランスノズル溶損部、１２・
・・ランスノズル。 代理人　弁理士　　秋　沢　政　光 信２名 ’：ｉ２図 才４図 １６図 才８図 才９図 第１０図 π 第１１図FIG. 1 is a sectional view of a lance nozzle N of the present invention, FIG. 2 is a sectional view taken along the line X-X in FIG. 5 is a sectional view of the lance nozzle O of the present invention, and FIG. 6 is a sectional view of the lance nozzle O of the present invention.
7 is a sectional view of a conventional lance nozzle, FIG. 8 is a sectional view taken along the X-X arrow in FIG. 7, and FIG. FIG. 10 is a diagram showing the state of erosion of the oxygen nozzle, and FIG. 11 is a sectional view of the lance body. ■...Oxygen tube, 2...Inner tube, 3...Outer tube, 4...
・Heat receiving surface water inlet, 5... Back water inlet, 6... Oxygen nozzle outer periphery water inlet, 7... Front water inlet, 8... Oxygen nozzle tip, 9... Heat receiving surface , 10... Cooling water inlet, 11.11'... Lance nozzle frayed part, 12.
...Lance nozzle. Agent Patent Attorney Masaaki Aki Sawa Mitsunobu 2 people': i2 Figure 4 Figure 16 Figure 8 Figure 9 Figure 10 Figure π Figure 11

Claims (3)

【特許請求の範囲】[Claims] （１）三重管構造のランスノズルにおいて、冷却用導水
口を酸素ノズル先端部の外周面に沿って複数個配設する
ことにより、酸素ノズルまわりの冷却を強化したことを
特徴とする転炉吹錬用ランスノズル。(1) In a lance nozzle with a triple pipe structure, cooling around the oxygen nozzle is strengthened by arranging a plurality of cooling water inlets along the outer circumferential surface of the oxygen nozzle tip. Lance nozzle for training. （２）三重管構造のランスノズルにおいて、冷却用導水
口を酸素ノズル先端部の外周面に沿って複数個配設する
と共に受熱面への冷却用導水口を配設することにより、
酸素ノズルまわりおよび受熱面の冷却を強化したことを
特徴とする転炉吹錬用ランスノズル。(2) In the triple-pipe structure lance nozzle, by arranging a plurality of cooling water inlets along the outer circumferential surface of the oxygen nozzle tip and also arranging a cooling water inlet to the heat receiving surface,
A lance nozzle for converter blowing, characterized by enhanced cooling around the oxygen nozzle and the heat receiving surface. （３）前記酸素ノズル先端部冷却用導水口が、酸素ノズ
ルの先端部の前後面部に、前面部は酸素ノズル円周方向
５°から３０°の範囲、後面部は酸素ノズル円周方向３
０°から１２０°の範囲内に配設されている特許請求の
範囲第２項記載の転炉吹錬用ランスノズル。(3) The water inlet for cooling the tip of the oxygen nozzle is provided on the front and rear surfaces of the tip of the oxygen nozzle, the front portion being in the range of 5° to 30° in the circumferential direction of the oxygen nozzle, and the rear portion being in the range of 3° in the circumferential direction of the oxygen nozzle.
A lance nozzle for converter blowing according to claim 2, which is arranged within a range of 0° to 120°.
JP13606784A 1984-06-30 1984-06-30 Lance nozzle for blowing in converter Pending JPS6115911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13606784A JPS6115911A (en) 1984-06-30 1984-06-30 Lance nozzle for blowing in converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13606784A JPS6115911A (en) 1984-06-30 1984-06-30 Lance nozzle for blowing in converter

Publications (1)

Publication Number Publication Date
JPS6115911A true JPS6115911A (en) 1986-01-24

Family

ID=15166436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13606784A Pending JPS6115911A (en) 1984-06-30 1984-06-30 Lance nozzle for blowing in converter

Country Status (1)

Country Link
JP (1) JPS6115911A (en)

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