JPWO2017103959A1 - Bottom blow plug with improved workability - Google Patents

Bottom blow plug with improved workability Download PDF

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JPWO2017103959A1
JPWO2017103959A1 JP2017555874A JP2017555874A JPWO2017103959A1 JP WO2017103959 A1 JPWO2017103959 A1 JP WO2017103959A1 JP 2017555874 A JP2017555874 A JP 2017555874A JP 2017555874 A JP2017555874 A JP 2017555874A JP WO2017103959 A1 JPWO2017103959 A1 JP WO2017103959A1
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plug
gas supply
supply pipe
gas
pipe
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JP6563034B2 (en
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邦博 小出
邦博 小出
智裕 津田
智裕 津田
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TYK Corp
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    • 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
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/167—Introducing a fluid jet or current into the charge the fluid being a neutral gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material
    • F27D2027/002—Gas stirring

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

転炉等の炉底に容易に組み付けることができる底吹きプラグを提供すること。
プラグ本体１にガスを送るガス供給管２の一部又は全部が曲折フリー管である。To provide a bottom blow plug that can be easily assembled to the bottom of a converter or the like.
Part or all of the gas supply pipe 2 that sends gas to the plug main body 1 is a bending-free pipe.

Description

本発明は、溶湯用ガス吹込みプラグに関する。詳しくは、転炉等の金属溶湯にガスを吹き込むための転炉等の底壁に組み込まれる底吹きプラグに関する。   The present invention relates to a gas injection plug for molten metal. Specifically, the present invention relates to a bottom blowing plug incorporated in a bottom wall of a converter or the like for blowing gas into a molten metal such as a converter.

従来から転炉においては、精錬の促進或いは溶鋼の撹拌等のために転炉の底部に埋め込まれた底吹きプラグからガスを吹き込むことが行われている。   Conventionally, in a converter, gas is blown from a bottom blowing plug embedded in the bottom of the converter for promoting refining or stirring molten steel.

転炉底部の概略構造は図４の縦端面図に示すようになっている。１０は炉底部分の鉄皮であり、２０はガス吹き込み用羽口である。炉底部分の鉄皮１０の上には、永久煉瓦９が張られており、この永久煉瓦９の上にはワーク煉瓦５が積層されている。そして、上記のワーク煉瓦５は、図４のように、下層煉瓦５ｂ、上層煉瓦５ａとによって二層張りになっている場合と、上下二層の層厚分を有する長尺の煉瓦を使用して一層張りになっている場合とがある。図中、６は羽口を形成する長尺一体化煉瓦、７は炉胴部、８は出鋼口である（例えば、特許文献１参照。）。   The schematic structure of the bottom of the converter is as shown in the vertical end view of FIG. 10 is an iron skin at the bottom of the furnace, and 20 is a tuyere for gas blowing. A permanent brick 9 is stretched on the iron skin 10 at the bottom of the furnace, and a work brick 5 is laminated on the permanent brick 9. As shown in FIG. 4, the work brick 5 is composed of a two-layered structure composed of a lower brick 5b and an upper brick 5a, and a long brick having two upper and lower layer thicknesses. There are cases where it is even more tensioned. In the figure, 6 is a long integrated brick forming a tuyere, 7 is a furnace body, and 8 is a steel exit (see, for example, Patent Document 1).

特開平５−７０８１９号公報JP-A-5-70819

転炉の耐火煉瓦は、高温の溶湯に曝され侵食されるため、定期的に張り直す必要がある。転炉の耐火煉瓦を張り直す時に、煉瓦は鉄皮の所定の位置より縦方向及び横方向に又ある場合には所定の位置を中心に同軸状に、煉瓦を張ることが行われている。   Since the refractory bricks of converters are exposed to high temperature molten metal and corrode, they need to be rebuilt regularly. When the refractory brick of the converter is re-stretched, the brick is stretched coaxially around a predetermined position when the brick is in the vertical and horizontal directions from a predetermined position of the iron skin.

底吹きプラグも耐火煉瓦の張る順番により鉄皮に設けられた底吹きプラグのガス供給管を通す位置に近い所で底吹きプラグが組み込まれる。   The bottom blowing plug is also installed at a position close to the position where the gas supply pipe of the bottom blowing plug provided on the iron shell is passed in the order in which the refractory bricks are stretched.

耐火煉瓦の張り付け時に生ずる誤差で底吹きプラグのガス供給管が鉄皮のガス供給管用穴に入らない不都合が生ずる場合がある。特に内挿式の底吹きプラグの場合で複数本のプラグを施工する場合は、羽口の鉄皮の穴が小さいため（図４参照）、底吹きプラグのガス供給管が鉄皮の穴に入らない不都合が生ずる。かかる場合、耐火煉瓦を換えたり、耐火煉瓦の一部を削って底吹きプラグの位置を調整する作業がなされる。しかし、かかる作業には多大な時間を要し、転炉の補修時間を長くするなどの不都合が生ずる。There may be an inconvenience that the gas supply pipe of the bottom blowing plug does not enter the hole for the gas supply pipe of the iron skin due to an error that occurs when attaching the refractory brick. In particular, when installing multiple plugs in the case of an interpolated bottom blow plug, since the hole in the tuyere's iron skin is small (see Fig. 4), the gas supply pipe of the bottom blow plug is placed in the hole in the iron skin. Inconvenience that does not enter. In such a case, the refractory bricks conversion Etari, the task of adjusting the position of the bottom blowing plug by cutting a portion of the refractory bricks are made. However, such work requires a great amount of time and causes inconveniences such as lengthening the repair time of the converter.

本発明は上記の問題に鑑みてなされたものであり、転炉等の炉底に容易に組み込むことができる底吹きプラグを提供することを課題とする。   This invention is made | formed in view of said problem, and makes it a subject to provide the bottom blow plug which can be easily integrated in furnace bottoms, such as a converter.

課題を解決するためになされた本発明に係る底吹きプラグは、転炉等の炉底耐火物中に設けられガスを噴出するプラグ本体と該プラグ本体にガスを供給するガス供給管とを有する底吹きプラグであって、前記ガス供給管の一部又は全部が曲折フリー管である。   A bottom blow plug according to the present invention made to solve the problem has a plug main body provided in a bottom refractory such as a converter, and a gas supply pipe for supplying gas to the plug main body. It is a bottom blow plug, and a part or all of the gas supply pipe is a bending free pipe.

ガス供給管の一部又は全部が曲折フリー管であるので、ガス供給管を挿通する鉄皮の穴にガス供給管を容易に挿通させることができる。その結果、底吹きプラグを炉底に容易に組み込むことができる。   Since part or all of the gas supply pipe is a bending-free pipe, the gas supply pipe can be easily inserted into the hole in the iron skin through which the gas supply pipe is inserted. As a result, the bottom blowing plug can be easily incorporated into the furnace bottom.

上記底吹きプラグにおいて、前記曲折フリー管はフレキシブルホース及び或いはベローズであるとよい。なお、前記曲折フリー管は耐熱性、耐圧性及び気密性を有しなければならない。   In the bottom blow plug, the bent free pipe may be a flexible hose and / or a bellows. The bent free pipe must have heat resistance, pressure resistance and airtightness.

また、前記プラグ本体は、扇型の横断面形状を有するとよい。これにより、炉心を中心にして炉心を取り囲むように底吹きプラグを組み込むことが容易になる。   The plug body may have a fan-shaped cross-sectional shape. Accordingly, it becomes easy to incorporate the bottom blowing plug so as to surround the core around the core.

また、前記プラグ本体は複数の貫通孔を備えるとよい。これにより、ガスを吹き込む孔が溶湯で塞がれることがなくなる。   The plug body may include a plurality of through holes. Thereby, the hole into which the gas is blown is not blocked by the molten metal.

ガス供給管の一部又は全部が曲折フリー管であるので、ガス供給管を挿通する転炉の鉄皮の穴にガス供給管を容易に挿通することができる。   Since part or all of the gas supply pipe is a bending-free pipe, the gas supply pipe can be easily inserted into the hole in the iron shell of the converter through which the gas supply pipe is inserted.

本発明の実施形態に係る底吹きプラグの縦断面図である。It is a longitudinal cross-sectional view of the bottom blow plug which concerns on embodiment of this invention. 本発明の実施形態に係る底吹きプラグの横断面図である。It is a cross-sectional view of a bottom blow plug according to an embodiment of the present invention. 曲折フリー管の変形態様を示す部分端面視図である。It is a partial end elevation view showing a deformation mode of a bending free pipe. 転炉底部の概略構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of a converter bottom part.

以下、本発明に係る転炉等の炉底耐火物中に設けられる底吹きプラグの一実施形態について図１、２を参照して具体的に説明する。   Hereinafter, an embodiment of a bottom blowing plug provided in a bottom refractory such as a converter according to the present invention will be specifically described with reference to FIGS.

実施形態の底吹きプラグは、図１に示すように、複数の貫通孔１１をもつプラグ本体１と、プラグ本体１の下部に取り付けられた曲折フリー管２とから構成されている。   As shown in FIG. 1, the bottom blow plug of the embodiment is composed of a plug body 1 having a plurality of through holes 11 and a bent free pipe 2 attached to the lower portion of the plug body 1.

プラグ本体１は、縦断面で上側が小で下側が大の台形状をなしており、転炉の溶湯に対面する平坦な上面１３と下面１２と外周面１４とを有する。プラグ本体１の外周面１４は、図２に示すように二つの平面１４ａと曲面１４ｂ、１４ｃとからなる。曲面１４ｂは、転炉の炉芯Ｏを中心とする半径Ｒ０の円の円弧であり、曲面１４ｃはＯを中心とする半径Ｒ１（＞Ｒ０）の円の円弧である。The plug main body 1 has a trapezoidal shape in which the upper side is small and the lower side is large and has a flat upper surface 13, a lower surface 12, and an outer peripheral surface 14 facing the molten metal of the converter. As shown in FIG. 2, the outer peripheral surface 14 of the plug body 1 is composed of two flat surfaces 14a and curved surfaces 14b and 14c. The curved surface 14b is a circular arc with a radius R 0 centered on the converter core O, and the curved surface 14c is a circular arc with a radius R 1 (> R 0 ) centered on O.

プラグ本体１の下面１２にはガス室３１を形成する基部３が取着されている。プラグ本体１の下部には貫通孔１１の下部が開口するガス室３１が設けられ、ガス室３１に曲折フリー管２が連通している。   A base 3 forming a gas chamber 31 is attached to the lower surface 12 of the plug body 1. A gas chamber 31 in which a lower portion of the through hole 11 is opened is provided at the lower portion of the plug body 1, and the bending free pipe 2 communicates with the gas chamber 31.

プラグ本体１の耐火物材質は高耐用のマグネシア・カーボン質が望ましい。   The refractory material of the plug body 1 is preferably a highly durable magnesia-carbon material.

図２に示すように、貫通孔１１は横断面形状が円形に形成されているとともにプラグ本体１の軸心に沿って延設されている。そして、各貫通孔１１はプラグ本体１の上面１３で開口すると共に底面１２で開口することにより溶湯にガスを吹き込むことができる。本実施形態のプラグ本体１には、９０個の貫通孔１１が６個の同心正六角形上に等間隔に配置されている。   As shown in FIG. 2, the through hole 11 has a circular cross-sectional shape and extends along the axis of the plug body 1. Each through hole 11 opens at the upper surface 13 of the plug body 1 and also opens at the bottom surface 12, whereby gas can be blown into the molten metal. In the plug body 1 of the present embodiment, 90 through holes 11 are arranged at regular intervals on 6 concentric regular hexagons.

ガス室３１は、円筒状基部３の下部を円盤４で塞ぐことで形成される。円盤４の中心にはプラグ本体１と同軸的に配置された取付け口４１が固設されている。５はプラグ本体１の下面１２に当接する金属製円盤である。   The gas chamber 31 is formed by closing the lower part of the cylindrical base 3 with a disk 4. An attachment port 41 arranged coaxially with the plug body 1 is fixed at the center of the disk 4. Reference numeral 5 denotes a metal disk that contacts the lower surface 12 of the plug body 1.

取付け口４１には曲折フリー管２の一方の端部が連接されている。金属製の曲折フリー管２は、薄肉パイプ２１とパイプ２１の外周に螺旋状に巻き付く部材２２とからなり、耐熱性、耐圧性、気密性に優れている。螺旋状に巻き付く部材２２は、薄肉パイプ２１が曲がっても円形断面を保持する作用する。   One end of the bending free pipe 2 is connected to the attachment port 41. The metal bending free pipe 2 includes a thin-walled pipe 21 and a member 22 that spirally wraps around the outer periphery of the pipe 21, and is excellent in heat resistance, pressure resistance, and airtightness. The spirally wound member 22 acts to maintain a circular cross section even when the thin pipe 21 is bent.

曲折フリー管２は、図３に示すフレキシブルホース２Ａでもよい。フレキシブルホース２Ａはステンレス製コアチューブ２Ａ１の外周をステンレス製オーバーブレード２Ａ２で被覆して成る。２Ａ３はステンレス製エンド・コネクションである。コアチューブ２Ａ１は一種のベローズであり、オーバーブレード２Ａ２はステンレス線の編物である。   The bending free pipe 2 may be a flexible hose 2A shown in FIG. The flexible hose 2A is formed by coating the outer periphery of a stainless steel core tube 2A1 with a stainless steel overblade 2A2. 2A3 is a stainless steel end connection. The core tube 2A1 is a kind of bellows, and the overblade 2A2 is a knitted stainless steel wire.

フレキシブルホース２Ａは曲折フリー管２より曲折性、耐熱性、耐圧性、気密性に優れている。   The flexible hose 2A is superior to the bending free pipe 2 in bending property, heat resistance, pressure resistance, and airtightness.

曲折フリー管２は、ベローズでもよい。   The bend free pipe 2 may be a bellows.

本実施形態の底吹きプラグは、ガス室３１に連通するガス管２の全部が曲折フリー管であるが、一部が曲折フリー管でもよい。   In the bottom blow plug of this embodiment, all of the gas pipes 2 communicating with the gas chamber 31 are bent free pipes, but some may be bent free pipes.

実施形態の吹込みプラグは、プラグ本体１の貫通孔１１にガスを供給するガス供給管が曲折フリー管２を備えているので、ガス供給管を挿通する転炉の鉄皮の穴にガス供給管を容易に挿通することができる。   In the blow plug of the embodiment, the gas supply pipe that supplies gas to the through hole 11 of the plug body 1 includes the bending-free pipe 2, so that the gas is supplied to the hole in the iron shell of the converter that passes through the gas supply pipe. The tube can be easily inserted.

また、実施形態の吹込みプラグは、プラグ本体１の外周面１４が転炉の炉芯Ｏを中心とする半径Ｒ０の円の円弧である曲面１４ｂとＯを中心とする半径Ｒ１（＞Ｒ０）の円の円弧である曲面１４ｃとを有するので、炉心を中心にして炉心を取り囲むように底吹きプラグを組み込むことが容易になる。Further, blowing plug embodiment, the radius R 1 of the outer peripheral surface 14 of the plug main body 1 around the curved surface 14b and O is an arc of a circle with a radius R 0 centered on furnace core O of the converter (> R 0 ) and the curved surface 14c that is a circular arc of the circle, it is easy to incorporate the bottom blowing plug so as to surround the core around the core.

１・・・・・・プラグ本体
２・・・・・・曲折フリー管
２Ａ・・・・・フレキシブルホース1 ···· Plug body 2 ··· Bend free tube 2A ··· Flexible hose

【０００２】
のガス供給管を通す位置に近い所で底吹きプラグが組み込まれる。
［０００７］
耐火煉瓦の張り付け時に生ずる誤差で底吹きプラグのガス供給管が鉄皮のガス供給管用穴に入らない不都合が生ずる場合がある。特に内挿式の底吹きプラグの場合で複数本のプラグを施工する場合は、羽口の鉄皮の穴が小さいため（図４参照）、底吹きプラグのガス供給管が鉄皮の穴に入らない不都合が生ずる。かかる場合、耐火煉瓦を換えたり、耐火煉瓦の一部を削って底吹きプラグの位置を調整する作業がなされる。しかし、かかる作業には多大な時間を要し、転炉の補修時間を長くするなどの不都合が生ずる。
［０００８］
本発明は上記の問題に鑑みてなされたものであり、転炉等の炉底に容易に組み込むことができる底吹きプラグを提供することを課題とする。
［課題を解決するための手段］
［０００９］
課題を解決するためになされた本発明は、炉底が羽口を有する鉄皮と、該鉄皮の内側に設けられた炉底耐火物と、炉内の金属溶湯にガスを吹き込む底吹きプラグと、を有する転炉であって、前記底吹きプラグは、前記炉底耐火物中に設けられ、ガスを噴出するプラグ本体と、前記プラグ本体にガスを供給するガス供給管と、を有し、前記ガス供給管の一部又は全部は、曲折フリー管であり、前記曲折フリー管は、一方の端部が前記プラグ本体に連接された状態で、前記羽口に挿通されている。
［００１０］
ガス供給管の一部又は全部が曲折フリー管であるので、ガス供給管を挿通する鉄皮の穴にガス供給管を容易に挿通させることができる。その結果、底吹きプラグを炉底に容易に組み込むことができる。
［００１１］
上記底吹きプラグにおいて、前記曲折フリー管はフレキシブルホース及び或いはベローズであるとよい。なお、前記曲折フリー管は耐熱性、耐圧性及び気密性を有しなければならない。
［００１２］
また、前記プラグ本体は、扇型の横断面形状を有するとよい。これにより、炉心を中心にして炉心を取り囲むように底吹きプラグを組み込むことが容易になる。
［００１３］
また、前記プラグ本体は複数の貫通孔を備えるとよい。これにより、ガスを吹き込む孔が溶湯で塞がれることがなくなる。
［発明の効果］
［００１４］
ガス供給管の一部又は全部が曲折フリー管であるので、ガス供給管を挿通[0002]
A bottom blowing plug is incorporated at a position close to the position where the gas supply pipe is passed.
[0007]
There may be an inconvenience that the gas supply pipe of the bottom blowing plug does not enter the hole for the gas supply pipe of the iron skin due to an error that occurs when attaching the refractory brick. In particular, when installing multiple plugs in the case of an interpolated bottom blow plug, since the hole in the tuyere's iron skin is small (see Fig. 4), the gas supply pipe of the bottom blow plug is placed in the hole in the iron skin. Inconvenience that does not enter. In such a case, work to change the position of the bottom blowing plug is performed by changing the refractory brick or by cutting a part of the refractory brick. However, such work requires a great amount of time and causes inconveniences such as lengthening the repair time of the converter.
[0008]
This invention is made | formed in view of said problem, and makes it a subject to provide the bottom blow plug which can be easily integrated in furnace bottoms, such as a converter.
[Means for solving problems]
[0009]
The present invention made to solve the problem includes an iron shell having a tuyere at the furnace bottom, a furnace refractory provided inside the iron shell, and a bottom blowing plug for blowing gas into the molten metal in the furnace. The bottom blow plug is provided in the furnace bottom refractory, and has a plug main body for injecting gas, and a gas supply pipe for supplying gas to the plug main body. A part or all of the gas supply pipe is a bending free pipe, and the bending free pipe is inserted into the tuyere with one end connected to the plug body.
[0010]
Since part or all of the gas supply pipe is a bending-free pipe, the gas supply pipe can be easily inserted into the hole in the iron skin through which the gas supply pipe is inserted. As a result, the bottom blowing plug can be easily incorporated into the furnace bottom.
[0011]
In the bottom blow plug, the bent free pipe may be a flexible hose and / or a bellows. The bent free pipe must have heat resistance, pressure resistance and airtightness.
[0012]
The plug body may have a fan-shaped cross-sectional shape. Accordingly, it becomes easy to incorporate the bottom blowing plug so as to surround the core around the core.
[0013]
The plug body may include a plurality of through holes. Thereby, the hole into which the gas is blown is not blocked by the molten metal.
[Effect of the invention]
[0014]
Since part or all of the gas supply pipe is a bending-free pipe, the gas supply pipe is inserted.

Claims (2)

転炉等の炉底耐火物中に設けられガスを噴出するプラグ本体と該プラグ本体にガスを供給するガス供給管とを有する底吹きプラグであって、前記ガス供給管の一部又は全部が曲折フリー管である底吹きプラグ。   A bottom blowing plug provided in a bottom refractory such as a converter and having a plug main body for ejecting gas and a gas supply pipe for supplying gas to the plug main body, wherein a part or all of the gas supply pipe is Bottom blow plug that is a bending free tube. 前記曲折フリー管はフレキシブルホース及び或いはベローズである請求項１に記載の底吹きプラグ。   The bottom blow plug according to claim 1, wherein the bending-free pipe is a flexible hose and / or a bellows.
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Publication number Priority date Publication date Assignee Title
JP6780115B2 (en) * 2017-07-11 2020-11-04 東京窯業株式会社 Furnace and bottom blowing plug

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785940A (en) * 1980-11-14 1982-05-28 Sumitomo Metal Ind Ltd Tuyere for refining molten metal
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
JPS60135512A (en) * 1983-12-26 1985-07-18 Nippon Steel Corp Oxygen converter
CN2612676Y (en) * 2003-04-17 2004-04-21 攀枝花新钢钒股份有限公司提钒炼钢厂 Bottom gas supply device for combined blown converter
JP2007262471A (en) * 2006-03-28 2007-10-11 Tokyo Yogyo Co Ltd Gas-blowing plug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567433A (en) *
JPH0639613B2 (en) * 1989-06-22 1994-05-25 日本鋼管株式会社 Bottom blowing tuyere
JPH0941024A (en) * 1995-05-25 1997-02-10 Japan Casting & Forging Corp Gas blowing nozzle into molten metal and its using method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5785940A (en) * 1980-11-14 1982-05-28 Sumitomo Metal Ind Ltd Tuyere for refining molten metal
JPS60135512A (en) * 1983-12-26 1985-07-18 Nippon Steel Corp Oxygen converter
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
CN2612676Y (en) * 2003-04-17 2004-04-21 攀枝花新钢钒股份有限公司提钒炼钢厂 Bottom gas supply device for combined blown converter
JP2007262471A (en) * 2006-03-28 2007-10-11 Tokyo Yogyo Co Ltd Gas-blowing plug

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EP3290532B1 (en) 2020-05-06
EP3290532A1 (en) 2018-03-07
CN107109502A (en) 2017-08-29
WO2017103959A1 (en) 2017-06-22
EP3290532A4 (en) 2018-05-23

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