JPS636189Y2 - - Google Patents
Info
- Publication number
- JPS636189Y2 JPS636189Y2 JP3165284U JP3165284U JPS636189Y2 JP S636189 Y2 JPS636189 Y2 JP S636189Y2 JP 3165284 U JP3165284 U JP 3165284U JP 3165284 U JP3165284 U JP 3165284U JP S636189 Y2 JPS636189 Y2 JP S636189Y2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- lance
- pipe
- secondary combustion
- converter
- 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
- 239000001301 oxygen Substances 0.000 claims description 58
- 229910052760 oxygen Inorganic materials 0.000 claims description 58
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 57
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 description 8
- 238000007670 refining Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000009841 combustion method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【考案の詳細な説明】
この考案は転炉ランスに関し、転炉精錬時の熱
付加を効率的に行うことを目的とする。[Detailed description of the invention] This invention relates to a converter lance and aims to efficiently add heat during converter refining.
転炉精錬に際しての熱付加は、溶銑使用比率を
減少させスクラツプの使用を多くする所謂高スク
ラツプ操業や、ステンレス鋼等高合金鋼の溶製時
の熱余裕或いは鉄鉱石、マンガン鉱石等酸化物の
還元量の増大等の点から近年益々その重要性が増
しており、これに関する種々の提案がなされ実施
されている。 Heat addition during converter refining is caused by so-called high scrap operation that reduces the proportion of hot metal used and increases the use of scrap, by the heat margin during the melting of high alloy steel such as stainless steel, or by the heating of oxides such as iron ore and manganese ore. It has become increasingly important in recent years in view of the increase in the amount of reduction, and various proposals regarding this have been made and implemented.
このような熱付加技術の代表的なものを挙げれ
ば、コークスや石炭或いはFSi合金等の発熱剤を
転炉の中へ投入するか又は上吹き酸素ランスを通
して鋼浴内に吹き込み、温度を上昇させる方法
と、上吹き酸素の一部により転炉内で発生する
COガスを転炉内で燃焼させ発生する熱を利用す
る方法がある。 A typical example of such heat addition technology is to raise the temperature by injecting a heat generating agent such as coke, coal, or FSi alloy into the converter or by blowing it into the steel bath through a top-blown oxygen lance. method, and some of the top-blown oxygen is generated in the converter.
There is a method that uses the heat generated by burning CO gas in a converter.
後者のCOガスを燃焼する方法は２次燃焼法と
して我国において一般的に実施されている。 The latter method of burning CO gas is commonly practiced in Japan as a secondary combustion method.
第１図にこの２次燃焼法の概略を示す。１が転
炉、２が上吹きランスであり、このランス２から
溶鋼Ｘに向けて精錬用酸素ジエツトを吹き込みＣ
＋１／２O2→COの反応を行わせる。同時にランス
２の下端側部から２次燃焼用酸素を吹込み、上記
反応により発生した転炉ガス（CO）をCO＋１／２
O2→CO2の反応により燃焼させ、この反応熱によ
り熱付加を行なうものである。 Figure 1 shows an outline of this secondary combustion method. 1 is a converter, 2 is a top blowing lance, and a refining oxygen jet is blown from this lance 2 toward molten steel
+1/2O 2 →CO reaction is carried out. At the same time, oxygen for secondary combustion is injected from the lower end side of the lance 2, and the converter gas (CO) generated by the above reaction is combusted by the reaction CO + 1/2 O 2 → CO 2 , and the heat of this reaction is used to add heat. It is something to do.
第２図はこの２次燃焼法に用いるランス下端部
の拡大図であり、酸素供給用の酸素管５とその外
側に設けられた冷却水通路６から成る３重管構造
となつている。そしてこの３重管構造の下端部
に、精錬用の酸素吹出し孔３が形成され、側部に
は斜め下方に伸びる２次燃焼用酸素の吹出し孔４
が形成されている。これらの孔３，４は、ランス
先端部を鋳込む時酸素管から冷却水通路６まで通
じるむくの部分を作り、ここに穴をあけることに
より形成される。 FIG. 2 is an enlarged view of the lower end of the lance used in this secondary combustion method, and has a triple-pipe structure consisting of an oxygen pipe 5 for supplying oxygen and a cooling water passage 6 provided outside of the oxygen pipe 5. An oxygen blow-off hole 3 for refining is formed at the lower end of this triple-pipe structure, and a blow-off hole 4 for secondary combustion oxygen extends diagonally downward on the side.
is formed. These holes 3 and 4 are formed by creating a bare part leading from the oxygen pipe to the cooling water passage 6 when casting the lance tip and drilling holes there.
このような２次燃焼用酸素吹出し孔４は周方向
に多数設けるのが好ましく、孔数を増すことによ
り水平方向の酸素供給の均一化及び酸素噴流の噴
流境界面積の増大を図れ、２次燃焼による熱付加
効率の向上を図れる。 It is preferable to provide a large number of such oxygen blow-off holes 4 for secondary combustion in the circumferential direction.By increasing the number of holes, it is possible to equalize the oxygen supply in the horizontal direction and increase the jet boundary area of the oxygen jet. The heat addition efficiency can be improved by
しかし、上記した従来のランスでは、孔数を増
すと冷却水通路の流路面積を減少させるため、作
れる孔数に限界があつた。そのため孔の径を大き
くして、必要な酸素噴出量を維持しているが、酸
素供給が不均一になり、また噴流境界面積が減少
する欠点に加えて、孔径を大きくすることにより
酸素噴流の減衰が遅くなり炉壁に未反応の酸素が
致達して炉壁寿命を短くする欠点があつた。 However, in the conventional lance described above, increasing the number of holes reduces the flow area of the cooling water passage, so there is a limit to the number of holes that can be made. Therefore, the diameter of the hole is increased to maintain the required amount of oxygen jet. However, in addition to the drawbacks of non-uniform oxygen supply and a decrease in the jet boundary area, increasing the hole diameter also reduces the oxygen jet flow. This had the disadvantage that the decay was slow and unreacted oxygen reached the furnace wall, shortening the life of the furnace wall.
本考案は上記した従来のランスの欠点を改善す
るためになされたもので、ランス下端近傍にラン
ス外周に沿つて設けられた環状の２次燃焼用酸素
管と、該酸素管の外周に設けられた複数の酸素噴
出孔と、前記２次燃焼用酸素管とランスの酸素管
とを連通する酸素導入管とを有することを基本的
な特徴とするものである。 The present invention was made to improve the drawbacks of the conventional lance described above, and includes an annular secondary combustion oxygen pipe provided along the outer periphery of the lance near the lower end of the lance, and an annular oxygen pipe provided around the outer periphery of the oxygen pipe. The basic feature is that it has a plurality of oxygen injection holes, and an oxygen introduction pipe that communicates the secondary combustion oxygen pipe with the oxygen pipe of the lance.
第３図は本考案によるランスの一実施例を示す
もので下端部の拡大図である。１０がランス本
体、１１が酸素供給用の酸素管であり、この周囲
に冷却水通路１２，１３が２重に巻かれ３重管構
造となつている。このランス１０の底面には精錬
用の酸素吹出し孔１４が形成されている。この実
施例では孔１４を底面周方向均等に３ケ所形成し
てある。 Fig. 3 shows an embodiment of the lance according to the present invention, with an enlarged view of the lower end. 10 is the lance body, 11 is an oxygen pipe for supplying oxygen, and cooling water passages 12 and 13 are wound twice around the lance body to form a triple pipe structure. The bottom surface of the lance 10 is provided with oxygen blowing holes 14 for refining. In this embodiment, three holes 14 are formed at equal intervals around the bottom surface.
ランス１０の下端の上方に、ランスの外周に沿
つて環状の２次燃焼用酸素管２０が水平方向に設
置されている。この実施例では酸素管２０はラン
ス１０の周側面から半径方向に若干突出させてい
るが、必ずしもこのように突出させる必要はな
く、ランス１０内に収めても良い。 An annular secondary combustion oxygen pipe 20 is installed horizontally above the lower end of the lance 10 along the outer periphery of the lance. In this embodiment, the oxygen tube 20 projects slightly from the circumferential surface of the lance 10 in the radial direction, but it does not necessarily have to project in this way and may be housed within the lance 10.
この酸素管２０は酸素導入管２２によりランス
１０の酸素管１１と連通している。酸素導入管２
２はこの実施例では水平断面十字状に配設された
４本の管から成つており、各管は酸素管１１から
冷却水通路１２，１３を貫通して酸素管２０に接
続している。 This oxygen tube 20 communicates with the oxygen tube 11 of the lance 10 through an oxygen introduction tube 22. Oxygen introduction tube 2
In this embodiment, 2 consists of four pipes arranged in a cross-shaped horizontal section, each pipe passing from an oxygen pipe 11 through cooling water passages 12 and 13 and connected to an oxygen pipe 20.
酸素管２０の外周には複数の酸素噴出孔２１が
形成されている。この噴出孔２１の孔径、数、ピ
ツチ等は必要に応じて適宜決めれば良い。この例
では、周方向所定の間隔をあけて合計28個の噴出
孔２１を設けている。なお酸素管２０の肉厚を10
mm程度とすれば噴出孔２１をあける方向を調整す
れば噴射方向をかえることが可能である。 A plurality of oxygen injection holes 21 are formed on the outer periphery of the oxygen tube 20 . The diameter, number, pitch, etc. of the ejection holes 21 may be determined as necessary. In this example, a total of 28 ejection holes 21 are provided at predetermined intervals in the circumferential direction. Note that the wall thickness of the oxygen tube 20 is 10
If it is about mm, it is possible to change the injection direction by adjusting the direction in which the injection holes 21 are formed.
なお、ランスに２次燃焼用の酸素管を別途設け
て、４重管構造としても良い。 Note that the lance may be provided with a separate oxygen pipe for secondary combustion to form a quadruple pipe structure.
以上の構成において、酸素管１１を通る酸素の
一部は酸素導入管２２を通つて環状の酸素管２０
に至り、ここから噴出孔２１を通つて転炉内の浴
鋼直上に供給され、２次燃焼に供される。 In the above configuration, a part of the oxygen passing through the oxygen pipe 11 passes through the oxygen introduction pipe 22 to the annular oxygen pipe 20.
From there, it is supplied directly above the bath steel in the converter through the jet hole 21 and subjected to secondary combustion.
噴出孔２１の数は周方向に任意に増せるから、
酸素の供給は均一化され、また噴流境界面積の増
大を図れ、その結果、熱付加効率の向上を図れ
る。また冷却水通路１２，１３を貫通するのは酸
素導入管２２だけであるから、冷却水の流通を妨
げることもない。 Since the number of ejection holes 21 can be increased arbitrarily in the circumferential direction,
The supply of oxygen is made uniform, and the boundary area of the jet stream can be increased, and as a result, the heat addition efficiency can be improved. Further, since only the oxygen introduction pipe 22 penetrates the cooling water passages 12 and 13, the flow of the cooling water is not obstructed.
以上述べたように本考案のランスによれば、２
次燃焼用酸素の均一な供給と酸素噴流の噴流境界
面積の増大を図れ、その結果２次燃焼による熱付
加効率の向上を実現できる効果がある。 As mentioned above, according to the lance of the present invention, 2
It is possible to uniformly supply oxygen for secondary combustion and increase the jet boundary area of the oxygen jet, and as a result, there is an effect that the heat addition efficiency by secondary combustion can be improved.
第１図は２次燃焼法の説明図、第２図は従来の
ランスの構造説明図、第３図は本考案によるラン
スの一実施例を示す正断面図、第４図はその水平
断面図である。
図中、１０……ランス、１１……酸素管、１２
と１３……冷却水通路、１４……酸素吹出し孔、
２０……２次燃焼用酸素管、２１……酸素噴出
孔、２２……酸素導入管。
Fig. 1 is an explanatory diagram of the secondary combustion method, Fig. 2 is an explanatory diagram of the structure of a conventional lance, Fig. 3 is a front sectional view showing an embodiment of the lance according to the present invention, and Fig. 4 is a horizontal sectional view thereof. It is. In the figure, 10...Lance, 11...Oxygen tube, 12
and 13...cooling water passage, 14...oxygen outlet,
20... Oxygen pipe for secondary combustion, 21... Oxygen injection hole, 22... Oxygen introduction pipe.
Claims (1)
た環状の２次燃焼用酸素管と、該酸素管の外周に
設けられた複数の酸素噴出孔と、前記２次燃焼用
酸素管とランスの酸素管とを連通する酸素導入管
とを有することを特徴とする転炉ランス。 An annular secondary combustion oxygen pipe provided along the outer periphery of the lance near the lower end of the lance, a plurality of oxygen injection holes provided on the outer periphery of the oxygen pipe, the secondary combustion oxygen pipe and the oxygen pipe of the lance. A converter lance characterized by having an oxygen introduction pipe communicating with the converter lance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3165284U JPS60143761U (en) | 1984-03-07 | 1984-03-07 | converter lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3165284U JPS60143761U (en) | 1984-03-07 | 1984-03-07 | converter lance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60143761U JPS60143761U (en) | 1985-09-24 |
| JPS636189Y2 true JPS636189Y2 (en) | 1988-02-22 |
Family
ID=30532443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3165284U Granted JPS60143761U (en) | 1984-03-07 | 1984-03-07 | converter lance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60143761U (en) |
-
1984
- 1984-03-07 JP JP3165284U patent/JPS60143761U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60143761U (en) | 1985-09-24 |
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