JPH0449170Y2 - - Google Patents
Info
- Publication number
- JPH0449170Y2 JPH0449170Y2 JP19763687U JP19763687U JPH0449170Y2 JP H0449170 Y2 JPH0449170 Y2 JP H0449170Y2 JP 19763687 U JP19763687 U JP 19763687U JP 19763687 U JP19763687 U JP 19763687U JP H0449170 Y2 JPH0449170 Y2 JP H0449170Y2
- Authority
- JP
- Japan
- Prior art keywords
- tuyere
- ribs
- flow path
- gas
- 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.)
- Expired
Links
- 239000007789 gas Substances 0.000 claims description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 7
- 229910001882 dioxygen Inorganic materials 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は溶融金属浴中へその底部からガスを
吹込むための多重管羽口に関するものである。[Detailed description of the invention] (Industrial field of application) This invention relates to a multi-tube tuyere for blowing gas into a molten metal bath from the bottom thereof.
（従来の技術）
転炉製鋼法において、固体鉄源の使用量を増大
したり、或いは実質的に固体鉄源のみを使用して
これを溶解する技術は公知である。(Prior Art) In the converter steel manufacturing method, techniques for increasing the amount of solid iron source used or for melting the solid iron source by using substantially only the solid iron source are known.
この方法において使用する底吹き羽口は、限定
的には３重管よりなり、内管からN2ガスの如き
不活性ガスをキヤリヤーガスとして石炭等の含炭
物質を吹込み、内管と中間管との間のガス流路か
ら純酸素ガスの如き酸素含有ガスを吹込み、更に
中間管と外管との間からLPGの如き羽口保護ガ
スが吹込まれる。かゝる羽口においては、内管と
中間管との間に、多数本のリブを形成して管間隔
を一定に保つことが望ましい。この種のリブにつ
いては既に特開昭58−100615号公報に開示されて
いる。 The bottom blowing tuyere used in this method is limited to a triple pipe, in which a carbon-containing substance such as coal is blown into the inner pipe using an inert gas such as N2 gas as a carrier gas, and the inner pipe and the intermediate pipe are An oxygen-containing gas such as pure oxygen gas is blown into the gas passage between the intermediate tube and the outer tube, and a tuyere protective gas such as LPG is blown in between the intermediate tube and the outer tube. In such a tuyere, it is desirable to form a large number of ribs between the inner tube and the intermediate tube to maintain a constant tube spacing. This type of rib has already been disclosed in Japanese Unexamined Patent Publication No. 100615/1983.
（考案が解決しようとする問題点）
上記のリブは、羽口全長に亘つて管間隔を一定
に保つために、羽口上端まで羽口全長に亘つて形
成されるのが一般的であつた。(Problem to be solved by the invention) The above ribs were generally formed along the entire length of the tuyere, up to the upper end of the tuyere, in order to keep the tube spacing constant over the entire length of the tuyere. .
ところが、酸素含有ガスを吹込むガス通路にお
いて、リブを羽口上端まで羽口全長に亘つて形成
すると、溶融金属浴からの滴下物（火種）がリブ
の上端に付着した場合、酸素が存在しているこ
と、リブは冷却効果が小さいこと、等の理由によ
りリブが燃焼し、冷却効果の小さい内管の溶損を
速め、羽口の寿命を短命にするという問題があつ
た。 However, if ribs are formed over the entire length of the tuyere up to the upper end of the tuyere in the gas passage through which oxygen-containing gas is blown, if drippings (sparks) from the molten metal bath adhere to the upper end of the ribs, oxygen will be present. Due to the fact that the cooling effect of the ribs is small, the ribs burn out, accelerating the erosion of the inner tube, which has a small cooling effect, and shortening the life of the tuyere.
この考案は上記の問題点を解決し、羽口の長寿
命化を図つたものである。 This invention solves the above problems and extends the life of the tuyere.
（問題点を解決するための手段・作用）
この考案は、内管と外管の間に形成されたガス
流路内にリブを形成し、このリブ付きガス流路か
ら溶融金属浴中へ酸素含有ガスを吹込む、底吹き
用羽口において、上記リブの上端を羽口上端より
下に位置せしめてなる、底吹き用羽口である。(Means/effects for solving the problem) This idea forms ribs in the gas flow path formed between the inner tube and the outer tube, and allows oxygen to flow from the ribbed gas flow path into the molten metal bath. The present invention is a bottom-blowing tuyere for blowing in gas containing gas, in which the upper end of the rib is positioned below the upper end of the tuyere.
この考案ではリブ上端が羽口上端より下に位置
しているため、溶融金属浴からの滴下物が酸素ガ
ス流路内へ浸入しても、直ちにリブに付着するこ
とがなく、酸素ガスにより冷却されてからリブに
接触することになり、リブを燃焼させるおそれが
ない。 In this design, the upper end of the rib is located below the upper end of the tuyere, so even if drippings from the molten metal bath enter the oxygen gas flow path, they do not immediately adhere to the rib, and are cooled by oxygen gas. Since it comes into contact with the ribs after it has been exposed, there is no risk of burning the ribs.
（実施例）
第１図はこの考案の羽口の平面図、第２図は縦
断面図である。図中１は内管、２は中間管、３は
外管である。内管１内は第１ガス流路４、内管１
と中間管２との間は第２ガス流路５、中間管２と
外管３との間は第３ガス流路６である。内管１の
外周面には多数本のリブ７が放射状に取付けら
れ、これによつて第２ガス流路５内にリブが形成
され、内管１と中間管２の間隔が一定に保たれる
ものである。(Example) FIG. 1 is a plan view of the tuyere of this invention, and FIG. 2 is a longitudinal sectional view. In the figure, 1 is an inner tube, 2 is an intermediate tube, and 3 is an outer tube. Inside the inner tube 1 is the first gas flow path 4 and the inner tube 1
A second gas flow path 5 exists between the intermediate tube 2 and the outer tube 2, and a third gas flow path 6 exists between the intermediate tube 2 and the outer tube 3. A large number of ribs 7 are radially attached to the outer peripheral surface of the inner tube 1, thereby forming ribs in the second gas flow path 5, and maintaining a constant distance between the inner tube 1 and the intermediate tube 2. It is something that can be done.
尚、第３ガス流路６は、中間管２の表面に形成
された複数本のスリツト８によつて作られてい
る。 Note that the third gas flow path 6 is formed by a plurality of slits 8 formed on the surface of the intermediate tube 2.
上記リブ７の上端７′は、第２図からも明らか
な様に、所定長さだけ羽口の上端よりも下に位
置させるのが、この考案の特徴である。この長さ
は100〜300mm程度が好ましいものである。 As is clear from FIG. 2, the feature of this invention is that the upper end 7' of the rib 7 is positioned below the upper end of the tuyere by a predetermined length. This length is preferably about 100 to 300 mm.
尚、本羽口における吹込みガスの一例を示せ
ば、
第１ガス流路４……石炭粉＋N2ガス
第２ガス流路５（リブ７あり）……酸素ガス
第３ガス流路６……LPG
の如くである。 Examples of gases blown into the tuyere include: First gas flow path 4... Coal powder + N 2 gas Second gas flow path 5 (with ribs 7)... Oxygen gas Third gas flow path 6... ...Like LPG.
この考案の実施例は上記のとおりであり、酸素
ガス流路５内に形成したリブ７の上端７′を羽口
の上端よりも例えば100〜300mm下方に位置させ
たので、溶融金属浴からの滴下物（火種）が酸素
ガス流路５内へ落下浸入しても、直ぐにリブ７に
付着することなく酸素ガスによつて冷却後リブに
接触することになり、従つてリブを燃焼すること
はない。よつてリブ燃焼を起点とした内管１の溶
損が効果的に防止でき、羽口の寿命延長が図れる
ものである。 The embodiment of this invention is as described above, and since the upper end 7' of the rib 7 formed in the oxygen gas flow path 5 is located, for example, 100 to 300 mm below the upper end of the tuyere, the molten metal bath is removed. Even if drippings (flame) fall into the oxygen gas flow path 5, they will not immediately adhere to the ribs 7, but will come into contact with the ribs after being cooled by the oxygen gas, and therefore will not burn the ribs. do not have. Therefore, it is possible to effectively prevent erosion of the inner tube 1 caused by rib combustion, and to extend the life of the tuyere.
（考案の効果）
この考案によれば、リブを形成したガス流路か
ら酸素含有ガスを吹込むという特定の羽口におい
て、その寿命を延長するものである。(Effects of the invention) According to this invention, the life of a specific tuyere that blows oxygen-containing gas through a gas flow path formed with ribs is extended.
図面はこの考案の一例を示したもので、第１図
は羽口の平面図、第２図は羽口の縦断面図であ
る。
１……内管、２……中間管、３……外管、７…
…上端が羽口の上端よりも下に位置しているリ
ブ。
The drawings show an example of this invention; FIG. 1 is a plan view of the tuyere, and FIG. 2 is a longitudinal sectional view of the tuyere. 1... Inner tube, 2... Middle tube, 3... Outer tube, 7...
...A rib whose upper end is located below the upper end of the tuyere.
Claims (1)
を形成し、このリブ付きガス流路から溶融金属浴
中へ酸素含有ガスを吹込む、底吹き用羽口におい
て、上記リブの上端を羽口上端より下に位置せし
めてなる、底吹き用羽口。 In a bottom-blowing tuyere in which a rib is formed in a gas flow path formed between an inner tube and an outer tube, and oxygen-containing gas is blown into a molten metal bath from this ribbed gas flow path, the ribs are A bottom-blowing tuyere whose upper end is positioned below the upper end of the tuyere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19763687U JPH0449170Y2 (en) | 1987-12-28 | 1987-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19763687U JPH0449170Y2 (en) | 1987-12-28 | 1987-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01102147U JPH01102147U (en) | 1989-07-10 |
| JPH0449170Y2 true JPH0449170Y2 (en) | 1992-11-19 |
Family
ID=31488181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19763687U Expired JPH0449170Y2 (en) | 1987-12-28 | 1987-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0449170Y2 (en) |
-
1987
- 1987-12-28 JP JP19763687U patent/JPH0449170Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01102147U (en) | 1989-07-10 |
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