JPH01129921A - Steel tapping hole for converter - Google Patents
Steel tapping hole for converterInfo
- Publication number
- JPH01129921A JPH01129921A JP28713487A JP28713487A JPH01129921A JP H01129921 A JPH01129921 A JP H01129921A JP 28713487 A JP28713487 A JP 28713487A JP 28713487 A JP28713487 A JP 28713487A JP H01129921 A JPH01129921 A JP H01129921A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- converter
- inert gas
- molten steel
- tapping
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000010079 rubber tapping Methods 0.000 title abstract description 21
- 239000011261 inert gas Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、転炉の出鋼時スラグが溶鋼中に混入すること
を防止する転炉用出鋼口に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tapping port for a converter that prevents slag from being mixed into molten steel during tapping of the converter.
［従来技術］
転炉吹錬時に生成されたスラグが転炉出鋼時に取鍋内に
流出すると、取鍋の溶鋼中にスラグ中の燐が復燐したり
、取鍋内へ投入する合金鉄の歩留低下、ＡＬ等の使用量
増加、及び、取鍋内に入ったスラグによって取鍋煉瓦の
溶損等の原因となっていた。このために、従来から取鍋
内にスラグを流出しないような多くのスラグ流出防止技
術の開発、実機化等が行われてきた。[Prior art] If the slag generated during converter blowing flows into the ladle during steel tapping in the converter, the phosphorus in the slag will rephosphorize during the molten steel in the ladle, and the ferroalloy charged into the ladle may This caused a decrease in the yield of aluminum, an increase in the amount of aluminum used, and melting and damage of the ladle bricks due to the slag that entered the ladle. For this reason, many techniques for preventing slag from flowing out into the ladle have been developed and put into practical use.
転炉出鋼時のスラグの流出防止を計る方法として特開昭
６２−８３４１６号がある。第２図は従来の出鋼方法を
示す図である。転炉出鋼口３の先端に摺動可能な遮蔽板
６を有するガイドボックス７を設け、スラグ２の流出を
判定したら遮蔽板に接続された押出用アーム５およびエ
アシリンダー４を作動させてスラグをカットする方法で
ある。JP-A-62-83416 discloses a method for preventing slag from flowing out during steel tapping in a converter. FIG. 2 is a diagram showing a conventional steel tapping method. A guide box 7 having a slidable shielding plate 6 is installed at the tip of the converter tapping port 3, and when it is determined that the slag 2 has flowed out, the extrusion arm 5 and air cylinder 4 connected to the shielding plate are operated to remove the slag. This is a method of cutting.
［発明が解決しようとする問題点］
従来の方法は、出鋼の都度遮蔽板を取り替えねばならな
いので人手が多くかかり、転炉の稼働率を上げられず、
スラグを流出してから判定していたので取鍋内にスラグ
が入るという問題があった。[Problems to be solved by the invention] In the conventional method, the shielding plate had to be replaced every time steel was tapped, which required a lot of manpower, and the operating rate of the converter could not be increased.
Since the judgment was made after the slag had flowed out, there was a problem that the slag would get into the ladle.
この考案は係る事情に鑑みてなされたものであって１、
取鍋内、にスラでの流出を防止することを目的とする゛
。This idea was made in view of the circumstances, and 1.
The purpose is to prevent spillage into the ladle.
［問題点を解決するための手段］
本発明は以上のような問題を解決しようとするもので、
転炉容器の構成する耐火物壁の所定領域に形成された転
炉用出鋼口において、転炉用出鋼口の外周部に多数の細
径鋼管を耐火物中に埋設したガス吹込みプラグを設け、
前記多数の細径鋼管を耐火物中に埋設したガス吹込みプ
ラグから不活−性ガス又はＣＯ２を転炉内に吹き込むこ
とを特徴とする。[Means for Solving the Problems] The present invention aims to solve the above problems.
A gas injection plug with a large number of small-diameter steel pipes embedded in the refractory around the outer periphery of the converter tap, which is formed in a predetermined area of the refractory wall of the converter vessel. established,
The method is characterized in that an inert gas or CO2 is blown into the converter from a gas blowing plug in which the large number of small diameter steel pipes are embedded in a refractory.
［作用］
出鋼中に、溶鋼中に不活性ガスを不活性ガス吹込みプラ
グから流出させ、溶鋼中に出鋼口を囲う不活性ガスの上
昇流を生じさせると、転炉内の溶鋼の表面に浮かんだス
ラグは不活性ガスの上昇流によって出鋼口の周辺にはこ
ないので出鋼される溶鋼中にスラグは混入することが無
くなる。[Function] During tapping, if inert gas flows out from the inert gas injection plug into the molten steel and an upward flow of inert gas surrounding the tap opening is created in the molten steel, the molten steel in the converter will be The slag floating on the surface does not come to the vicinity of the tapping port due to the upward flow of inert gas, so that no slag is mixed into the molten steel being tapped.
［実施例］
本発明の実施例を図面に基づいて以下に説明する。第１
図は本発明の一実施例を示す出鋼口の断面図である。第
１図において、１５は転炉炉体外側の鉄皮であり、１４
は鉄皮の内張り煉瓦、３は出鋼口で、４は出鋼口を構成
する出鋼口煉瓦である。このような構成において本発明
の出鋼口は、出鋼口煉瓦４の外周部に細径鋼管（０，５
ｍｍ〜３ＩＩＩｌΦ）９を煉瓦中に埋設して製作した不
活性ガス吹込みプラグ８を配置し、吹込みプラグ８の底
部に風箱１０を接続し、出鋼口鉄皮の外周部に設けたヘ
ッダー管１２と風箱１０の間を連絡管１１で連絡してい
る。ヘッダー管１２には図示しない不活性ガス容器から
不活性ガスが供給されるようになっている。[Example] An example of the present invention will be described below based on the drawings. 1st
The figure is a sectional view of a tap hole showing an embodiment of the present invention. In Fig. 1, 15 is the iron shell outside the converter body, and 14
3 is the lining brick of the steel shell, 3 is the tap hole, and 4 is the tap brick that makes up the tap hole. In such a configuration, the tapping port of the present invention has a small diameter steel pipe (0,5
An inert gas blowing plug 8 made by embedding an inert gas blowing plug 8 (mm ~ 3IIIlΦ) 9 in a brick was placed, a wind box 10 was connected to the bottom of the blowing plug 8, and it was installed on the outer periphery of the steel tap shell. A connecting pipe 11 communicates between the header pipe 12 and the wind box 10. Inert gas is supplied to the header pipe 12 from an inert gas container (not shown).
次にこの一実施例の動作について説明する。Next, the operation of this embodiment will be explained.
１は溶鋼、２は溶鋼の表面に浮かんだスラグである。出
鋼時に図示しない不活性ガスの容器から不活性ガスをヘ
ッダー管１２に送り、ヘッダー管１２から連絡管１１を
介して風箱１０に送られる。風箱１０に送られた不−活
性ガスは吹込みプラグ８の細径鋼管（１關Φ）９を、通
って溶鋼中、に流出される。流出された不活性ガスは気
泡となって溶鋼中を上昇し、出鋼口１３を−囲う不活性
ガス流１３を形成する。ガス流１３は溶鋼表面に溶鋼の
湧出部１６を作り、スラグが出鋼される溶鋼に混入する
ことが防止でき′る・。この実施例、では不活性ガスで
説明したが、Ｃ０２ガスでも同様な効果が確認された。1 is molten steel, and 2 is slag floating on the surface of the molten steel. During tapping, inert gas is sent from an inert gas container (not shown) to the header pipe 12, and from the header pipe 12 to the wind box 10 via the connecting pipe 11. The inert gas sent to the wind box 10 passes through a small diameter steel pipe (1 diameter) 9 of the blow plug 8 and flows out into the molten steel. The discharged inert gas becomes bubbles and rises in the molten steel, forming an inert gas flow 13 surrounding the tap hole 13. The gas flow 13 creates a gushing part 16 of molten steel on the surface of the molten steel, which prevents slag from being mixed into the molten steel being tapped. Although this example was explained using an inert gas, similar effects were confirmed using CO2 gas.
［発明の効果］
本発明の装置は以上のように構成されているから、・従
来方法のように出鋼の都度遮蔽板を取替える必要がなく
、バルブ操作だけでよいから人手も係らないので、転炉
の稼働率を上げることができる。又、取鍋内にスラグが
混入することもなくなる。[Effects of the Invention] Since the apparatus of the present invention is configured as described above, there is no need to replace the shielding plate every time steel is tapped as in the conventional method, and there is no need for manpower as only valve operation is required. The operating rate of the converter can be increased. Also, slag will not get mixed into the ladle.
第１図は本発明の一実施例を示す出鋼口の断面図、第２
図は従来の出鋼方法を示す図である。
３・・・出鋼口、４・・・出鋼口煉瓦、８・・・吹込み
プラグ、９・・・細径鋼管、１０・・・風箱、１１・・
・連絡管、１２・・・ヘッダー管。Fig. 1 is a sectional view of a tap hole showing one embodiment of the present invention;
The figure shows a conventional steel tapping method. 3... Steel tapping port, 4... Steel tapping port brick, 8... Blow plug, 9... Small diameter steel pipe, 10... Wind box, 11...
・Connection pipe, 12...Header pipe.
Claims (1)
炉用出鋼口において、転炉用出鋼口の外周部に多数の細
径鋼管を耐火物中に埋設したガス吹込みプラグを設け、
前記多数の細径鋼管を耐火物中に埋設したガス吹込みプ
ラグから不活性ガス又はＣＯ＿２を転炉内に吹き込むこ
とを特徴とする転炉用出鋼口。A gas injection plug with a large number of small-diameter steel pipes embedded in the refractory around the outer periphery of the converter tap, which is formed in a predetermined area of the refractory wall of the converter vessel. established,
A tap port for a converter, characterized in that an inert gas or CO_2 is blown into the converter from a gas blowing plug in which the plurality of small diameter steel pipes are embedded in a refractory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28713487A JPH01129921A (en) | 1987-11-13 | 1987-11-13 | Steel tapping hole for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28713487A JPH01129921A (en) | 1987-11-13 | 1987-11-13 | Steel tapping hole for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01129921A true JPH01129921A (en) | 1989-05-23 |
Family
ID=17713507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28713487A Pending JPH01129921A (en) | 1987-11-13 | 1987-11-13 | Steel tapping hole for converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01129921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981046A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Treatment method for controlling tapping and slag discharging of high-temperature peroxidation converter |
-
1987
- 1987-11-13 JP JP28713487A patent/JPH01129921A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981046A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Treatment method for controlling tapping and slag discharging of high-temperature peroxidation converter |
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