WO2017103959A1 - Bottom-blowing plug with improved workability - Google Patents
Bottom-blowing plug with improved workability Download PDFInfo
- Publication number
- WO2017103959A1 WO2017103959A1 PCT/JP2015/006284 JP2015006284W WO2017103959A1 WO 2017103959 A1 WO2017103959 A1 WO 2017103959A1 JP 2015006284 W JP2015006284 W JP 2015006284W WO 2017103959 A1 WO2017103959 A1 WO 2017103959A1
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- WO
- WIPO (PCT)
- Prior art keywords
- plug
- gas
- converter
- blowing
- pipe
- Prior art date
Links
- 238000007664 blowing Methods 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000011449 brick Substances 0.000 description 16
- 238000005452 bending Methods 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
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
- C21C5/48—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
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- 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; Electric arc furnaces ; Tank furnaces
- F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for 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
Definitions
- the present invention relates to a gas injection plug for molten metal. Specifically, the present invention relates to a bottom-blowing plug incorporated in the bottom wall of a converter or the like for blowing gas into molten metal such as a converter.
- the bend free tube 2 may be a bellows.
Landscapes
- 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
The purpose of the present invention is to provide a bottom-blowing plug which can be easily mounted to the bottom of a furnace such as a converter. A part or the whole of a gas supply tube 2 for supplying gas to a plug main body 1 is a flexibly bendable tube.
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 the bottom wall of a converter or the like for blowing gas into 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。
2. Description of the Related Art Conventionally, in a converter, it has been practiced to blow gas 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 shell of the furnace bottom portion, and 20 is a gas blowing tuyere. A permanent brick 9 is stretched on the iron shell 10 of the hearth portion, and a work brick 5 is stacked on the permanent brick 9. And as above-mentioned work brick 5 uses the case where it has become two layer covering by lower layer brick 5b and upper layer brick 5a like FIG. 4, and the long brick which has the layer thickness of upper and lower two layers In some cases, it is even more tense. In the figure, 6 is a long integrated brick which forms a tuyere, 7 is a furnace body, and 8 is a steel outlet (for example, refer to patent documents 1.).
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。
The converter's refractory bricks are exposed to high-temperature molten metal and corroded, so they need to be periodically rebuilt. When the refractory bricks of the converter are re-stretched, the bricks are stretched in a longitudinal direction and a lateral direction from the predetermined position of the iron shell, and if the bricks are coaxially centered at the predetermined position if they are in position.
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 incorporated into the bottom-blowing plug near the position where it passes through the gas feed pipe of the bottom-blowing plug provided on the iron shell 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。
An error that occurs when the refractory bricks are attached may cause the gas supply pipe of the bottom blow plug not to enter the hole for the gas supply pipe of the shell. In particular, when installing multiple plugs in the case of the bottom blow plug of the interpolation type, the gas feed pipe of the bottom blow plug is in the hole of the iron skin because the hole of the iron skin of the tuyere is small (see FIG. 4) The inconvenience that it does not enter occurs. 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 an operation requires a great deal of time and causes inconveniences such as prolonging 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。
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a bottom-blowing plug that can be easily incorporated into the bottom of a converter or the like.
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-blown plug according to the present invention made to solve the problem has a plug body provided in a furnace bottom refractory such as a converter for spouting gas, and a gas supply pipe for supplying gas to the plug body. It is a bottom blowing plug, A part or all of the said 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 a part or all of the gas supply pipe is a bending free pipe, the gas supply pipe can be easily inserted into the hole of the iron shell which is inserted through the gas supply pipe. 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 above-mentioned bottom blow plug, the bent free pipe may be a flexible hose and / or a bellows. In addition, the said bending 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. This facilitates the incorporation of the bottom-blown plug around 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。
Further, the plug body may include a plurality of through holes. As a result, the hole for blowing the gas 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 a part or all of the gas supply pipe is a bending free pipe, the gas supply pipe can be easily inserted into the hole of the iron shell of the converter through which the gas supply pipe is inserted.
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, one embodiment of a bottom blowing plug provided in a furnace 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-blown plug according to the embodiment is composed of a plug body 1 having a plurality of through holes 11 and a bend free tube 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 body 1 has a vertical cross section with a small upper side and a large lower trapezoidal shape, and has a flat upper surface 13, a lower surface 12 and an outer peripheral surface 14 facing the molten metal of the converter. The outer peripheral surface 14 of the plug body 1 is composed of two flat surfaces 14a and curved surfaces 14b and 14c as shown in FIG. The curved surface 14 b is an arc of a circle of radius R 0 centered on the furnace core O of the converter, and the curved surface 14 c is an arc of a circle of 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 the lower part of the through hole 11 is opened is provided in the lower part 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 main body 1 is preferably magnesia-carbon having a high durability.
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 axial center of the plug body 1. Each through hole 11 is opened at the upper surface 13 of the plug body 1 and is opened at the bottom surface 12 so that gas can be blown into the molten metal. In the plug body 1 of the present embodiment, 90 through holes 11 are arranged at equal intervals on six 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 portion of the cylindrical base 3 with the disk 4. An attachment port 41 coaxially disposed with the plug body 1 is fixed at the center of the disc 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 mounting port 41. The metal bending and freeing pipe 2 is composed of a thin-walled pipe 21 and a member 22 spirally wound 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-walled 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 bend free tube 2 may be a flexible hose 2A shown in FIG. The flexible hose 2A is formed by covering 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 over blade 2A2 is a 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 more excellent in bending property, heat resistance, pressure resistance and air tightness than the bending free pipe 2.
曲折フリー管２は、ベローズでもよい。
The bend free tube 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-blowing plug of the present embodiment, all of the gas pipes 2 communicating with the gas chamber 31 are bent free pipes, but a part 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-in plug according to the embodiment, the gas supply pipe for supplying gas to the through hole 11 of the plug body 1 is provided with the bending free pipe 2, so that gas is supplied to the hole of the iron shell of the converter inserted 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 (> Since it has a curved surface 14c which is a circular arc of a circle of R 0 ), it becomes easy to incorporate a bottom-blowing plug so as to surround the core centering on 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
２・・・・・・曲折フリー管
２Ａ・・・・・フレキシブルホース 1 ······
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 having a plug body provided in a furnace bottom refractory such as a converter for spouting gas and a gas supply pipe for supplying gas to the plug body, wherein a part or all of the gas supply pipe is Bottom blow plug that is a bend 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 bent free pipe is a flexible hose and / or a bellows.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/006284 WO2017103959A1 (en) | 2015-12-17 | 2015-12-17 | Bottom-blowing plug with improved workability |
| EP15910651.7A EP3290532B1 (en) | 2015-12-17 | 2015-12-17 | Converter furnace with bottom-blowing plug with improved workability |
| JP2017555874A JP6563034B2 (en) | 2015-12-17 | 2015-12-17 | Bottom blow plug with improved workability |
| CN201580001389.4A CN107109502A (en) | 2015-12-17 | 2015-12-17 | The bottom blowing connector of lifting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/006284 WO2017103959A1 (en) | 2015-12-17 | 2015-12-17 | Bottom-blowing plug with improved workability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017103959A1 true WO2017103959A1 (en) | 2017-06-22 |
Family
ID=59056488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/006284 WO2017103959A1 (en) | 2015-12-17 | 2015-12-17 | Bottom-blowing plug with improved workability |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3290532B1 (en) |
| JP (1) | JP6563034B2 (en) |
| CN (1) | CN107109502A (en) |
| WO (1) | WO2017103959A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019012601A1 (en) * | 2017-07-11 | 2019-01-17 | 東京窯業株式会社 | Furnace body and bottom-blowing plug |
Citations (4)
| 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 |
| 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 of combined blown converter |
| JP2007262471A (en) * | 2006-03-28 | 2007-10-11 | Tokyo Yogyo Co Ltd | Gas-blowing plug |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE567433A (en) * | ||||
| JPS60135512A (en) * | 1983-12-26 | 1985-07-18 | Nippon Steel Corp | Oxygen converter |
| 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 |
-
2015
- 2015-12-17 WO PCT/JP2015/006284 patent/WO2017103959A1/en active Application Filing
- 2015-12-17 CN CN201580001389.4A patent/CN107109502A/en active Pending
- 2015-12-17 JP JP2017555874A patent/JP6563034B2/en active Active
- 2015-12-17 EP EP15910651.7A patent/EP3290532B1/en active Active
Patent Citations (4)
| 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 |
| 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 of combined blown converter |
| JP2007262471A (en) * | 2006-03-28 | 2007-10-11 | Tokyo Yogyo Co Ltd | Gas-blowing plug |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3290532A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019012601A1 (en) * | 2017-07-11 | 2019-01-17 | 東京窯業株式会社 | Furnace body and bottom-blowing plug |
| JPWO2019012601A1 (en) * | 2017-07-11 | 2019-12-19 | 東京窯業株式会社 | Furnace body and bottom blow plug |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6563034B2 (en) | 2019-09-04 |
| EP3290532A1 (en) | 2018-03-07 |
| CN107109502A (en) | 2017-08-29 |
| EP3290532B1 (en) | 2020-05-06 |
| JPWO2017103959A1 (en) | 2018-09-20 |
| EP3290532A4 (en) | 2018-05-23 |
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