JP2002327218A - Tuyere structure for blowing gas into molten metal vessel - Google Patents
Tuyere structure for blowing gas into molten metal vesselInfo
- Publication number
- JP2002327218A JP2002327218A JP2001128717A JP2001128717A JP2002327218A JP 2002327218 A JP2002327218 A JP 2002327218A JP 2001128717 A JP2001128717 A JP 2001128717A JP 2001128717 A JP2001128717 A JP 2001128717A JP 2002327218 A JP2002327218 A JP 2002327218A
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- molten metal
- tuyere
- mgo
- outer tube
- 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.)
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- Manufacture And Refinement Of Metals (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は耐用性に優れた溶融
金属容器用のガス吹き込み羽口構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas blowing tuyere structure for a molten metal container having excellent durability.
【０００２】[0002]
【従来の技術】溶融金属を精錬する際、溶融金属容器の
炉底に配置した羽口から酸素あるいは不活性ガス等を吹
き込み攪拌すると精錬効果が向上することが知られてい
る。しかし、溶融金属を攪拌するための精錬ガスは、通
常室温でありこれは溶融金属の温度に対し極めて低いこ
とによる熱衝撃、且つ流速が大きいことによる高温流体
磨耗等により、ガス流通部のポーラス耐火物およびそれ
を保持するスリーブ耐火物の損耗が大きくなる。羽口寿
命が溶融金属容器の寿命を律しているため、従来より羽
口及びその周辺耐火物の損耗を抑制し、寿命延長化が試
みられてきた。2. Description of the Related Art It is known that when refining a molten metal, oxygen or an inert gas or the like is blown in from a tuyere arranged at the furnace bottom of a molten metal container and stirred to improve the refining effect. However, the refining gas for stirring the molten metal is usually room temperature, which is extremely low with respect to the temperature of the molten metal, and the high temperature fluid abrasion due to the high flow velocity causes the porous refractory gas in the gas flow section. The wear of the object and the sleeve refractory that holds it increases. Since the tuyere life governs the life of the molten metal container, attempts have been made to suppress the wear of the tuyere and its surrounding refractories and extend the life.
【０００３】例えば、特開平６−２５７９４８号公報
は、羽口とその周辺の構造を上段部（稼働面側）と下段
部の２段構造とし、損耗される上段部のみを補修し、耐
用寿命を延ばすことを目的とした。しかし、単に補修回
数を増やして溶融金属容器の耐用寿命を増やしたにすぎ
ず、実質的な羽口の寿命延長化とは言えない。また、熱
応力の軽減化を目的として羽口スリーブの分割構造があ
る。例えば、特開平８−２４６０２３号公報は、羽口ス
リーブの少なくとも厚さ方向の１／２は円周方向におい
て分割されており、その分割数が少なくとも２以上であ
るスリーブ構造をとる構造である。だが、この分割構造
だと稼働初期のスリーブ損傷には効果が認められるが、
長時間使用する場合は分割目地部に溶融金属が侵入しや
すく、これによりスリーブの脱落や溶融金属漏れ等の発
生する危険度が高かった。さらに、特開平１０−２９０
５６号公報は、羽口スリーブをれんがとしているため、
製造上の制約から大型の羽口に適用するのが困難であっ
た。For example, Japanese Patent Application Laid-Open No. 6-257948 discloses a tuyere and its surrounding structure having a two-stage structure of an upper portion (operating surface side) and a lower portion, and repairing only the upper portion which is worn away, and having a service life of less than 100%. The aim was to prolong. However, the service life of the molten metal container is simply increased by increasing the number of repairs, and it cannot be said that the life of the tuyere is substantially extended. There is also a split structure of the tuyere sleeve for the purpose of reducing thermal stress. For example, Japanese Unexamined Patent Publication No. Hei 8-24623 discloses a structure in which at least one half of the tuyere sleeve in the thickness direction is divided in the circumferential direction, and the number of divisions is at least two or more. However, this split structure is effective for sleeve damage at the beginning of operation,
When used for a long time, the molten metal easily penetrates into the joint joints, thereby increasing the risk of falling off the sleeve and leaking the molten metal. Further, JP-A-10-290
No. 56 discloses that the tuyere sleeve is made of brick,
It was difficult to apply to large tuyeres due to manufacturing restrictions.
【０００４】[0004]
【発明が解決すべき課題】上記従来技術では解決できな
い問題点を解明するため、稼働中の羽口（ポーラス、ス
リーブ耐火物）および羽口周辺の耐火物等の残厚測定か
らの損耗速度、そして使用後の各耐火物から損傷状態を
確認した。羽口（ポーラスとスリーブ耐火物）の損耗速
度は、稼働開始から約１５回位までの初期は１０〜２０
mm／回と高い溶損速度だが、約１５回を越えると２〜５
mm／回と低い損耗速度を示す傾向を把握した。損耗状態
の観察より、スリーブ耐火物からポーラス耐火物にかけ
て凹状にへこむ損耗が観察された。前者の凹状のへこみ
は熱衝撃による損傷が主原因と推定され、特に稼働初期
（開始から約１５回の間）に起こることが羽口損耗速度
測定から確認された。稼働中期以降（約１５回以降）に
なると凹状にへこんだポーラス耐火物から噴出するガス
による周囲耐火物への摩耗（バックアタック）による損
耗が推測された。In order to clarify the problems that cannot be solved by the prior art, the wear rate from the measurement of the remaining thickness of the tuyere (porous, sleeve refractory) in operation and the refractory around the tuyere, The damaged state was confirmed from each refractory after use. The wear rate of tuyeres (porous and sleeve refractories) is 10-20 in the initial period from the start of operation to about 15 times.
Although the rate of erosion is as high as 1 mm / time, 2-5
The tendency to show a low wear rate of mm / cycle was grasped. From the observation of the worn state, it was observed that the wear was dented from the sleeve refractory to the porous refractory. The former concave dent was presumed to be mainly caused by damage due to thermal shock, and it was confirmed from the measurement of the tuyere abrasion rate that it occurred particularly in the early stage of operation (between about 15 times from the start). After the middle stage of operation (after about 15 times), it was estimated that the gas ejected from the concave refractory having a concave shape caused abrasion (back attack) to the surrounding refractory due to gas.
【０００５】そこで、本発明は、スリーブおよびポーラ
ス耐火物のへこみ損耗と周囲耐火物のバックアタック摩
耗を低減することが可能な溶融金属容器用のガス吹き込
み羽口構造を提供することを目的とする。Accordingly, an object of the present invention is to provide a gas injection tuyere structure for a molten metal container capable of reducing dent wear of a sleeve and a porous refractory and back attack wear of a surrounding refractory. .
【０００６】[0006]
【課題を解決するための手段】本発明の羽口構造は、か
かる状況に鑑みなされたものである。その要旨とすると
ころは、ガス流通部の多孔質（ポーラス）耐火物ａとそ
れを保持するスリーブ耐火物ｂとから構成される溶融金
属容器のガス吹き込み羽口において、スリーブ耐火物が
多孔質耐火物に接する内側管ｃと前記内側管の周囲に外
側管ｄを有する多重管からなり、前記内側管ｃの厚みが
ポーラス耐火物の全厚より薄く、前記内側管ｃの下部を
前記外側管ｄが抱え込む形状となっていることを特徴と
する羽口構造である。さらに、内側管ｃがＭｇＯ−Ｃ
質、Ａｌ2 Ｏ3 −Ｃ質、Ａｌ2 Ｏ3−ＭｇＯ−Ｃ質の何
れか１つからなり、耐熱性モルタル耐火物を介して前記
外側管ｄはＡｌ2 Ｏ3 −ＭｇＯ質、Ａｌ2 Ｏ3 −スピネ
ル質、Ａｌ2 Ｏ3 −スピネル−ＭｇＯ質のいずれか１つ
からなることを特徴とする。これらの構造と材料を基
に、前記外側管の１番外側の管が円周方向に４〜８分割
された羽口構造である。SUMMARY OF THE INVENTION The tuyere structure of the present invention has been made in view of such a situation. The point is that the sleeve refractory is made of a porous refractory at a gas injection tuyere of a molten metal container composed of a porous refractory a in a gas flow portion and a sleeve refractory b holding the refractory. An inner tube c in contact with an object and a multi-layered tube having an outer tube d around the inner tube, wherein the thickness of the inner tube c is smaller than the total thickness of the porous refractory, and the lower portion of the inner tube c is formed by the outer tube d. The tuyere structure is characterized in that the tuyere has a shape to be held. Further, the inner tube c is made of MgO-C
Material, Al 2 O 3 —C material, or Al 2 O 3 —MgO—C material, and the outer tube d is made of Al 2 O 3 —MgO material, Al 2 O 3 - spinel, Al 2 O 3 -, characterized in that comprise any one of spinel -MgO quality. Based on these structures and materials, a tuyere structure in which the outermost tube of the outer tube is divided into four to eight in the circumferential direction.
【０００７】[0007]
【発明の実施の形態】本発明の特徴の１つである円筒形
状をなすスリーブ耐火物を多重管構造にするとは、例え
ば図１および２に示す羽口断面のように、ポーラス耐火
物ａに接する内側管ｃと外側管ｄから構成することを意
味する。外側管ｄは使用条件・用途に応じて２重以上で
も構わないが、スリーブ耐火物全体の直径寸法や施工等
を考え合わせると、内側管ｃと１重か２重の外側管ｄが
好ましい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One of the features of the present invention is that a cylindrical sleeve refractory has a multi-tube structure. For example, as shown in the tuyere cross-section shown in FIGS. This means that the inner pipe c and the outer pipe d are in contact with each other. The outer pipe d may be double or more depending on the use conditions and applications. However, considering the diameter of the entire sleeve refractory and the construction, the outer pipe d is preferably one or two times the inner pipe c.
【０００８】図３に示す羽口断面図は、厚さ方向でスリ
ーブ耐火物の内側管ｃをポーラス耐火物ａの全厚より薄
くして、その下部を外側管ｄが抱え込む構造を示す。こ
の構造は内側管ｃと外側管ｄが１重の場合であるが、外
側管を２重以上とする場合も、外側管ｄのうち、内側管
ｃに接する側の管が内側管ｃの下部を前記外側管が抱え
込み、その外側管の下部を更に外側管ｄにて順次受ける
構造とすれば良い（図４）。外側管が内側管の下部を抱
え込む構造をとるのは、多重管構造のそれぞれの管の間
にある目地部から溶融金属が差し込んだ場合に、最短に
鉄皮側へ流れ込むのを防ぐ目的のものである。The tuyere sectional view shown in FIG. 3 shows a structure in which the inner tube c of the sleeve refractory is made thinner than the entire thickness of the porous refractory a in the thickness direction, and the lower portion is held by the outer tube d. This structure is a case where the inner pipe c and the outer pipe d are single. However, when the outer pipe is doubled or more, the side of the outer pipe d which is in contact with the inner pipe c is a lower part of the inner pipe c. May be held by the outer tube, and the lower portion of the outer tube may be sequentially received by the outer tube d (FIG. 4). The outer pipe holds the lower part of the inner pipe to prevent the molten metal from flowing into the steel shell in the shortest time when the molten metal is inserted from the joint between the pipes in the multiple pipe structure. It is.
【０００９】次に、内側管と外側管の材質については、
従来の羽口の損耗状況観察結果から材質を決める。例え
ば、スリーブ耐火物の内側管ｃは、ポーラス耐火物を流
通するガス温度と溶融金属の影響で熱スポールを受けや
すい箇所であり、且つ攪拌された溶融金属が接触する箇
所でもある。このことから内側管ｃの材質として耐スポ
ーリング性を有するＭｇＯ−Ｃ質、Ａｌ2 Ｏ3 −Ｃ質、
Ａｌ2 Ｏ3 −ＭｇＯ−Ｃ質等が選定されることが好まし
い。しかも高温流体による磨耗を考慮して、上述材質の
不定形耐火物を常圧下でプレキャストブロックとするば
かりでなく緻密化した材料構造であっても良い。例え
ば、減圧下あるいはプレス等により作製したプレキャス
トブロックでも構わない。Next, regarding the materials of the inner tube and the outer tube,
The material is determined from the result of the conventional tuyere wear state observation. For example, the inner tube c of the sleeve refractory is a location that is susceptible to thermal spall due to the influence of the gas temperature and the molten metal flowing through the porous refractory, and is also a location where the agitated molten metal comes into contact. MgO-C protein having spalling resistance as the material of the inner tube c Therefore, Al 2 O 3 -C quality,
It is preferable to select an Al 2 O 3 —MgO—C material or the like. In addition, in consideration of the wear due to the high-temperature fluid, not only the refractory made of the above-mentioned material but also a precast block under normal pressure may be used as well as a dense material structure. For example, a precast block manufactured under reduced pressure or by pressing may be used.
【００１０】外側部のスリーブ耐火物は、その損耗状況
観察よりスリーブ耐火物自身および周囲の一般敷耐火物
等の熱膨張で発生する熱応力と流動する溶融金属やスラ
グによる反応・浸透が起こりやすい箇所である。このた
め、外側管には熱応力を吸収しやすく、且つ耐溶融金属
反応性を有する材質であるＡｌ2 Ｏ3 −ＭｇＯ質、Ａｌ
2 Ｏ3 −スピネル質あるいはＡｌ2 Ｏ3 −スピネル−Ｍ
ｇＯ質が好ましい。外側管を２重にした場合は、熱間で
低弾性率で熱応力を吸収しやすい材質のＡｌ2Ｏ3 −Ｍ
ｇＯ質を内側管に、耐溶融金属反応性を有するＡｌ2 Ｏ
3 −スピネル質を外側管にする構造で、より不定形耐火
物の機能を使いわけても良い。From the observation of the state of wear of the outer sleeve refractory, thermal stress generated by thermal expansion of the sleeve refractory itself and surrounding general-purpose refractory, and reaction and permeation by flowing molten metal or slag easily occur. Part. Therefore, the outer tube is made of Al 2 O 3 —MgO, which is a material that easily absorbs thermal stress and has a resistance to molten metal,
2 O 3 -spinel or Al 2 O 3 -spinel-M
gO quality is preferred. When the outer tube is doubled, Al 2 O 3 -M made of a material that has a low elastic modulus and is easy to absorb thermal stress
Al 2 O with resistance to molten metal
3- A structure in which spinel material is used as the outer tube, and the function of a more irregular shaped refractory may be used.
【００１１】次に、羽口周囲の一般敷耐火物の材質（熱
膨張係数、弾性率等）や溶融金属容器の寸法形状等の影
響で、稼働時に羽口全体に対して大きな熱応力が加わる
ことが推定される場合は、外側管の内、１番外側の管を
円周方向に４〜８分割することが好ましい。この分割
は、分割された耐火物の変形能（動き易さ）の作用で、
羽口に集中する熱応力を分散させる効果がある。分割数
を４〜８にする理由は、分割数を４より少なくすると分
割された耐火物が変形しずらく、分割数を８より多くす
ると、分割された耐火物間の目地数が多くなり、目地の
溶損による溶融金属の侵入を引き起こしやすくなるため
である。Next, a large thermal stress is applied to the entire tuyere during operation due to the material (thermal expansion coefficient, elastic modulus, etc.) of the general refractory surrounding the tuyere and the size and shape of the molten metal container. When it is presumed that the outermost tube of the outer tubes is preferably divided into four to eight in the circumferential direction. This division is a function of the deformability (movability) of the divided refractory,
This has the effect of dispersing the thermal stress concentrated at the tuyere. The reason for setting the number of divisions to 4 to 8 is that if the number of divisions is less than 4, the divided refractories are difficult to deform, and if the number of divisions is more than 8, the number of joints between the divided refractories increases, This is because it is easy to cause intrusion of molten metal due to erosion of the joint.
【００１２】[0012]
【実施例】［実施例１］スリーブ耐火物構造を図１に示
すように、内側管と１重の外側管として羽口の耐用性試
験を溶鋼鍋の羽口にて実施した。内側管ｃの耐火物に
は、いずれも減圧鋳込み乾燥したプレキャストブロック
のＭｇＯ−Ｃ質、Ａｌ2 Ｏ3 −ＭｇＯ−Ｃ質そしてＡｌ
2 Ｏ3 −Ｃ質不定形耐火物の３種を準備した。そして外
側管ｄの耐火物には、流し込み成形・乾燥したプレキャ
ストブロックのＡｌ2 Ｏ3 −ＭｇＯ質、Ａｌ2 Ｏ3 −ス
ピネル−ＭｇＯ質そしてＡｌ2 Ｏ3 −スピネル質不定形
耐火物の３種とした。内側管の材質は、外側管のそれに
比べいずれも緻密で耐スポーリング性を有する。実機試
験にはおのおのの耐火物を表１に示す組み合わせで試験
し、羽口補修を必要とするまでの溶融金属を受けた回数
を寿命とした。比較として従来使用されているスリーブ
耐火物材質のＡｌ2 Ｏ3 −ＭｇＯ質不定形耐火物だけを
用いて、図５に示す従来構造に組み試験した。EXAMPLES Example 1 As shown in FIG. 1, a sleeve refractory structure was used as an inner tube and a single outer tube, and a tuyere durability test was conducted at a tuyere of a molten steel pot. The refractories of the inner pipe c are all MgO-C, Al 2 O 3 -MgO-C, and Al 2 O 3 -MgO-C of a precast block dried under reduced pressure.
Three types of 2 O 3 -C amorphous refractories were prepared. And the refractory of the outer tube d, Al 2 O 3 -MgO quality of casting, dry precast blocks, Al 2 O 3 - spinel -MgO electrolyte and Al 2 O 3 - 3 kinds of spinel monolithic refractories And The material of the inner tube is denser and more resistant to spalling than that of the outer tube. In the actual machine test, each refractory was tested in the combinations shown in Table 1, and the number of times the molten metal was received until tuyere repair was required was defined as the life. As a comparison, a test was conducted by assembling the conventional structure shown in FIG. 5 using only the Al 2 O 3 —MgO amorphous refractory material of the sleeve refractory material conventionally used.
【００１３】その結果、各組み合わせとも従来構造のＡ
ｌ2 Ｏ3 −ＭｇＯ質不定形耐火物だけの構造よりも長寿
命であることを示した。内側管耐火物に発生している亀
裂の数は、従来構造のそれよりも少ないことから、耐ス
ポーリング性を確認するとともに、外側管においても溶
損等は従来のそれよりも小さかった。特に、内側管をＭ
ｇＯ質、外側管をＡｌ2 Ｏ3 −スピネル−ＭｇＯ質ある
いはＡｌ2 Ｏ3 −ＭｇＯ質不定形耐火物が長寿命であっ
た。As a result, each of the combinations has the A
than the structure of only l 2 O 3 -MgO quality monolithic refractories have shown that a long life. Since the number of cracks generated in the inner tube refractory was smaller than that of the conventional structure, the spalling resistance was confirmed, and the outer tube also had smaller erosion and the like than the conventional structure. In particular, the inner tube
gO quality, the Al 2 O 3 outer tube - spinel -MgO protein or Al 2 O 3 -MgO quality monolithic refractories were long life.
【００１４】[0014]
【表１】 [Table 1]
【００１５】［実施例２］スリーブ耐火物構造を図２に
示すように、内側管ｃと２重管からなる外側管ｄにし、
１番外側は円周方向に１／４づつ分割する構造とした。
内側管ｃの耐火物には、減圧鋳込み・乾燥したプレキャ
ストブロックのＭｇＯ−Ｃ質不定形耐火物を、外側管の
内側にはＡｌ2 Ｏ3 −スピネル−ＭｇＯ質、１番外側に
はＡｌ2 Ｏ 3 −ＭｇＯ質不定形耐火物の流し込み成形・
乾燥したプレキャストブロックを準備し、溶鋼鍋羽口に
て試験した。比較例は実施例１と同様の組成・構造とし
た。試験の結果この構造の寿命は、１１２回と従来の７
０回に比べ大幅な羽口寿命の延長を示した。また、２重
の外側管ｄ間の目地に湯差しを観察したが、外側管下部
で内側管を受ける構造の箇所で湯が止まっていることを
確認した。[Embodiment 2] FIG. 2 shows a refractory structure of a sleeve.
As shown, an outer tube d consisting of an inner tube c and a double tube,
The outermost portion is divided into quarters in the circumferential direction.
For the refractory of the inner pipe c, vacuum cast and dried pre-
The MgO-C amorphous refractory of the strobing block is
Al insideTwoOThree-Spinel-MgO material, outermost
Is AlTwoO Three-Casting of MgO amorphous refractories
Prepare a dried precast block and place it in the tuyere
Tested. The comparative example has the same composition and structure as in Example 1.
Was. Test results show that the life of this structure is 112 times, which is
The tuyere life was significantly prolonged compared to zero times. Also double
Observation of a jug at the joint between the outer pipes d
That the hot water stops at the point where the inner tube is received
confirmed.
【００１６】[0016]
【発明の効果】以上説明したように、本発明による溶融
金属容器の羽口構造によれば、羽口の各部特有の損耗に
耐えられる性質の耐火物材種を選定・使用することで損
耗抑制を可能にした。さらに、スリーブ耐火物構造を内
側管、外側管に分けても内側管を外側管下部で受ける構
造を有することで、溶融金属の漏れ防止を可能とするこ
とが確認できたとともに、外側管の１番外側を分割する
ことで寿命を大幅に延ばす効果があった。As described above, according to the tuyere structure of a molten metal container according to the present invention, wear is suppressed by selecting and using a refractory material having a property capable of withstanding the wear specific to each part of the tuyere. Enabled. Further, it has been confirmed that, even if the sleeve refractory structure is divided into an inner tube and an outer tube, the structure in which the inner tube is received at the lower portion of the outer tube makes it possible to prevent molten metal from leaking. Dividing the outermost portion has the effect of greatly extending the life.
【図１】本発明の羽口構造の断面概略図。（外側管ｄが
１重の場合）FIG. 1 is a schematic sectional view of a tuyere structure according to the present invention. (When outer tube d is single)
【図２】本発明の羽口構造の断面概略図。（外側管ｄが
２重の場合）FIG. 2 is a schematic sectional view of the tuyere structure of the present invention. (When the outer tube d is double)
【図３】外側管が内側管の下部を抱え込む形状のスリー
ブ耐火物断面構造。FIG. 3 is a cross-sectional structure of a sleeve refractory in which an outer tube holds a lower portion of an inner tube.
【図４】外側管が２重管となる場合のスリーブ耐火物の
断面構造。FIG. 4 is a cross-sectional structure of a sleeve refractory when the outer tube is a double tube.
【図５】従来の羽口構造の断面概略図。FIG. 5 is a schematic sectional view of a conventional tuyere structure.
ａ…多孔質（ポーラス）耐火物 ｂ…スリーブ耐火物 ｃ…内側管 ｄ…外側管 a: porous refractory b: sleeve refractory c: inner tube d: outer tube
Claims (3)
（ａ）とそれを保持するスリーブ耐火物（ｂ）とから構
成される溶融金属容器のガス吹き込み羽口において、ス
リーブ耐火物が多孔質耐火物に接する内側管（ｃ）と前
記内側管の周囲に外側管（ｄ）を有する多重管からな
り、前記内側管（ｃ）の厚みがポーラス耐火物の全厚よ
り薄く、前記内側管（ｃ）の下部を前記外側管（ｄ）が
抱え込む形状となっていることを特徴とする溶融金属容
器用のガス吹き込み羽口構造。In a gas blowing tuyere of a molten metal container comprising a porous refractory (a) in a gas flow portion and a sleeve refractory (b) holding the refractory, the sleeve refractory is made of a porous material. An inner pipe (c) in contact with a high quality refractory, and a multi-layer pipe having an outer pipe (d) around the inner pipe, wherein the thickness of the inner pipe (c) is smaller than the total thickness of the porous refractory; A gas injection tuyere structure for a molten metal container, wherein a lower portion of (c) is held by the outer tube (d).
3 −Ｃ質、Ａｌ2 Ｏ 3 −ＭｇＯ−Ｃ質の何れか１つから
なり、耐熱性モルタル耐火物を介して前記外側管（ｄ）
はＡｌ2 Ｏ3 −ＭｇＯ質、Ａｌ2 Ｏ3 −スピネル質、Ａ
ｌ2 Ｏ3 −スピネル−ＭｇＯ質のいずれか１つからなる
ことを特徴とする請求項１に記載の溶融金属容器用のガ
ス吹き込み羽口構造。2. The inner tube (c) is made of MgO—C, AlTwoO
Three-C quality, AlTwoO Three-From any one of the MgO-C materials
The outer tube (d) through a heat-resistant mortar refractory
Is AlTwoOThree-MgO, AlTwoOThree-Spinel, A
lTwoOThree-Made of any one of spinel-MgO material
The gas for a molten metal container according to claim 1, wherein
Squirt tuyere structure.
方向に４〜８分割されていすることを特徴とする請求項
１又は２に記載の溶融金属容器用のガス吹き込み羽口構
造。3. The gas blowing blade for a molten metal container according to claim 1, wherein the outermost tube of the outer tube (d) is divided into four to eight parts in a circumferential direction. Mouth structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001128717A JP2002327218A (en) | 2001-04-26 | 2001-04-26 | Tuyere structure for blowing gas into molten metal vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001128717A JP2002327218A (en) | 2001-04-26 | 2001-04-26 | Tuyere structure for blowing gas into molten metal vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002327218A true JP2002327218A (en) | 2002-11-15 |
Family
ID=18977374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001128717A Withdrawn JP2002327218A (en) | 2001-04-26 | 2001-04-26 | Tuyere structure for blowing gas into molten metal vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002327218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009156011A1 (en) * | 2008-06-26 | 2009-12-30 | Refractory Intellectual Property Gmbh & Co. Kg | Fireproof ceramic gas cleaning stone |
-
2001
- 2001-04-26 JP JP2001128717A patent/JP2002327218A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009156011A1 (en) * | 2008-06-26 | 2009-12-30 | Refractory Intellectual Property Gmbh & Co. Kg | Fireproof ceramic gas cleaning stone |
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