JPS63235420A - Device for preventing flow-out of slag - Google Patents
Device for preventing flow-out of slagInfo
- Publication number
- JPS63235420A JPS63235420A JP6911087A JP6911087A JPS63235420A JP S63235420 A JPS63235420 A JP S63235420A JP 6911087 A JP6911087 A JP 6911087A JP 6911087 A JP6911087 A JP 6911087A JP S63235420 A JPS63235420 A JP S63235420A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- stopper
- molten metal
- tap
- cylindrical member
- 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.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 84
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 238000007667 floating Methods 0.000 claims abstract description 6
- 230000002265 prevention Effects 0.000 claims description 13
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 abstract description 20
- 238000007670 refining Methods 0.000 abstract description 6
- 238000007598 dipping method Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 28
- 239000010959 steel Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、例えば転炉等の精錬炉から溶湯を出湯スる
際に出湯口からスラグが流出することを防止するスラグ
流出防止装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a slag outflow prevention device that prevents slag from flowing out from a tap opening when molten metal is tapped out of a refining furnace such as a converter.
［従来の技術］
転炉製鋼においては、溶鋼の吹錬終了後、転炉を傾動さ
せて出鋼口を下方に向け、この出鋼口から溶鋼を出鋼す
る。この場合に、転炉内の溶ｕＡｙＡ面にはスラグが浮
遊しているので、出鋼に際して溶鋼と共にスラグも流出
してしまう。このスラグは燐及び鉄等の酸化物を多量に
含有しているため、このスラグが取鍋に流出し、更に、
製品に混入した場合には、燐等の酸化物によって製品に
介在物欠陥が生じてしまう。また、このようにスラグが
流−出すると、アルミニウム等の脱酸剤の添加量を増加
せざるを得す、製品のコストが上昇すると共にこれら脱
酸剤が介在物となり製品の品質欠陥が増加してしまう。[Prior Art] In converter steelmaking, after blowing of molten steel is completed, the converter is tilted so that the tapping port faces downward, and the molten steel is tapped from the tapping port. In this case, since slag is floating on the molten uAyA surface in the converter, the slag flows out together with the molten steel during tapping. This slag contains a large amount of oxides such as phosphorus and iron, so this slag flows into the ladle, and furthermore,
If mixed into products, oxides such as phosphorus will cause inclusion defects in the products. In addition, when slag flows out in this way, it is necessary to increase the amount of deoxidizing agents such as aluminum, which increases the cost of the product and increases product quality defects as these deoxidizing agents become inclusions. Resulting in.
このため、スラグが取鍋内の溶鋼中に混入することを防
止するために、種々の方法が採用されており、このよう
な方法としてはスラグが転炉内から流出することを防止
するもの、及び、溶鋼と共に排出されたスラグを取鍋内
から除去するものがある。前者としては、スラグ及び溶
鋼の中間の比重を有するスラグストッパを溶鋼とスラグ
との間に位置させておき溶鋼が排出された時点でこのス
ラグストッパにより出鋼口を閉塞させる技術がある。一
方、後者としては、取鍋内の溶鋼に浮遊しているスラグ
を吸引除去するＶ Ｓ Ｃ（ＶａｃｕｕｍＳｌａｇ
Ｃ１ｅａｎｅｒ）と称する装置を使用する技術、及び、
ドラツガにより溶鋼表面のスラグを掻き出す技術がある
。For this reason, various methods have been adopted to prevent slag from entering the molten steel in the ladle.These methods include methods to prevent slag from flowing out from the converter; There is also a method that removes slag discharged together with molten steel from inside the ladle. As for the former, there is a technique in which a slag stopper having a specific gravity between that of slag and molten steel is positioned between molten steel and slag, and the tapping port is closed by this slag stopper when the molten steel is discharged. On the other hand, as for the latter, V SC (Vacuum Slag) is used to suction and remove the slag floating in the molten steel in the ladle.
A technique using a device called C1eaner), and
There is a technology to scrape out slag from the surface of molten steel using a dratsuga.
［発明が解決しようとする問題点］
しかしながら、スラグストッパを使用する場合には、出
鋼末期に溶鋼に渦流が発生することによリスラグが溶鋼
中に混入してしまい、スラグストッパが出鋼口を閉塞す
る前に多量のスラグが流出する虞がある。また、ｖＳＣ
又はドラツガを使用する場合には、これらの作業中に溶
鋼の温度が低下するので、出鋼時の溶鋼温度を１０乃至
３０℃上昇させる必要があるが、転炉内の溶鋼温度を上
昇させると転炉耐火物の寿命が短くなり、脱燐が困難に
なって脱燐剤の量を増加せざるを得ないので、製造コス
トが上昇してしまうという問題点がある。[Problems to be Solved by the Invention] However, when using a slag stopper, slag is mixed into the molten steel due to the generation of vortices in the molten steel at the end of tapping, and the slag stopper closes the tap hole. There is a risk that a large amount of slag will flow out before the slag is blocked. Also, vSC
Or, when using a dratsuga, the temperature of the molten steel decreases during these operations, so it is necessary to raise the molten steel temperature at the time of tapping by 10 to 30 degrees Celsius, but if the molten steel temperature in the converter is increased, There are problems in that the life of the converter refractory is shortened, dephosphorization becomes difficult, and the amount of dephosphorizing agent has to be increased, leading to an increase in manufacturing costs.
この発明は斯かる事情に鑑みてなされたものであって、
取鍋へのスラグ流出を有効に防止することができ、精錬
炉内の溶湯温度を上昇させる必要がないスラグ流出防止
装置を提供することを目的とする。This invention was made in view of such circumstances, and
It is an object of the present invention to provide a slag outflow prevention device that can effectively prevent slag outflow into a ladle and does not require raising the temperature of molten metal in a refining furnace.
［問題点を解決するための手段］
この発明に係るスラグ流出防止装置は、精錬炉に形成さ
れた出湯口を下方に向けてこの出湯口から溶湯を出湯す
る際に、出湯口から溶湯上に浮遊するスラグの流出を防
止するスラグ流出防止装置であって、スラグ及びＩｍの
中間の比重を有し出湯口直上域のＷＪ濶とスラグとの間
に浮遊するストッパと、出湯口の径よりも大きな内径を
有し出湯口直上域のスラグに浸漬され出湯口を含む領域
の直上のスラグ領域を囲繞する筒状部材と、前記ストッ
パと筒状部材とを連結しストッパを出湯口の直上に保持
する連結部材とを有することを特徴とする。[Means for Solving the Problems] The slag outflow prevention device according to the present invention prevents the molten metal from flowing from the tap hole onto the molten metal when the tap hole formed in the refining furnace is directed downward and the molten metal is tapped from the tap hole. This is a slag outflow prevention device that prevents floating slag from flowing out, and includes a stopper that has a specific gravity between that of slag and Im and is suspended between the WJ water and the slag in the area directly above the tap, and a stopper that is larger than the diameter of the tap. A cylindrical member having a large inner diameter, immersed in the slag in the area directly above the tap, and surrounding the slag area directly above the area including the tap, and the stopper and the cylindrical member are connected to hold the stopper directly above the tap. It is characterized by having a connecting member.
［作用］
この発明においては、上述のように、出湯口直上域のス
ラグと溶鋼との間にストッパを浮遊させると共に、出湯
口を含む領域の直上のスラグを囲繞する状態で筒状部材
をスラグに浸漬し、更に、連結部材によりストッパを出
湯口直上域に保持するので、出湯末期に筒状部材の外側
のスラグが出湯口に流れ込むことが阻止されると共に、
ストッパが確実に出湯口を閉塞する。このため、スラグ
の流出を確実に阻止することができる。[Function] As described above, in this invention, the stopper is suspended between the slag and molten steel in the area directly above the tap, and the cylindrical member is suspended in a state surrounding the slag directly above the area including the tap. Furthermore, since the stopper is held in the area directly above the tap hole by the connecting member, the slag outside the cylindrical member is prevented from flowing into the tap hole at the end of tapping, and
The stopper reliably closes the outlet. Therefore, it is possible to reliably prevent the slag from flowing out.
［実施例１
以下、添付図面を参照してこの発明の実施例について具
体的に説明する。[Embodiment 1] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.
第１図はこの実施例に係るスラグ流出防止装置を転炉内
に設置した状態を示す模式図である。転炉１は鉄皮２に
耐火物３が内張すされて構成されており、その内部に溶
鋼４を貯留している。そして更に、溶ｒｊ４４の場面上
にはスラグ５が浮遊している。この転炉１の周壁には出
鋼口６が形成されており、出鋼の際には図示するように
、この出鋼口６が真下に向くように転炉１が傾動される
。出鋼口６の直上にはスラグ流出防止装置１０が設置さ
れる。このスラグ流出防止５ｕｔｉｏは、ストッパ２０
と筒状部材３０と、ストッパ２０及び筒状部材３０を連
結する３本の鎖４０とから構成されている。ストッパ２
０は半球状をなし、鉄芯２２の外側を耐火部材２１で覆
って構成されており、溶鋼４及びスラグ５の中間の比重
を有していて、溶！ＪＡ４とスラグ５との間にその球面
を下方に向けて浮遊するようになっている。筒状部材３
ｏは、その比重がスラグ５よりも若干大きくストッパ２
０よりも小さい耐火物でつくられており、その径が出鋼
口６の径よりも大きい円筒状をなしている。この筒状部
材３０は、その内部領域にストッパを位置させた状態で
出鋼口６を含む領域の直上のスラグ領域に浸漬され、そ
の下端部が若干溶鋼４に浸漬される。鎖４０は、筒状部
材３ｏの内部？！間のほぼ中央にストッパ２ｏが位置す
るようにストッパ２０と筒状部材３ｏとを連結している
。FIG. 1 is a schematic diagram showing a state in which a slag outflow prevention device according to this embodiment is installed in a converter. The converter 1 is composed of a steel shell 2 lined with a refractory 3, and molten steel 4 is stored therein. Furthermore, slag 5 is floating on the scene of melting rj 44. A tapping port 6 is formed in the peripheral wall of the converter 1, and during tapping, the converter 1 is tilted so that the tapping port 6 faces directly below, as shown in the figure. A slag outflow prevention device 10 is installed directly above the tapping port 6. This slag outflow prevention 5utio is a stopper 20.
, a cylindrical member 30 , and three chains 40 connecting the stopper 20 and the cylindrical member 30 . Stopper 2
0 has a hemispherical shape, is constructed by covering the outside of an iron core 22 with a fireproof member 21, has a specific gravity between that of molten steel 4 and slag 5, and has a molten steel 4 and a slag 5. It is designed to float between JA4 and slug 5 with its spherical surface facing downward. Cylindrical member 3
o is a stopper 2 whose specific gravity is slightly larger than that of the slag 5.
It is made of a refractory smaller than 0, and has a cylindrical shape with a diameter larger than the diameter of the tap hole 6. This cylindrical member 30 is immersed in the slag region directly above the region including the tap hole 6 with a stopper positioned in its internal region, and its lower end is slightly immersed in the molten steel 4. Is the chain 40 inside the cylindrical member 3o? ! The stopper 20 and the cylindrical member 3o are connected such that the stopper 2o is located approximately in the center between them.
次に、この実施例の動作について説明する。先ず、転炉
吹錬が終了した時点で転炉１を傾動させて出鋼口６から
溶鋼４を流出させる。次いで、出鋼が８０％終了した時
点で出鋼口６の直上域のスラグにスラグ流出防止装置１
０を設置する。この場合に、出鋼口６の口径は例えば３
００ａ＋ａであり、ストッパ２０の直径が３００１１１
１、筒状部材３０の内径が１５０Ｏｎ＋ｍである。また
、筒状部材３０の高さはスラグ５の厚みよりも大きいこ
とが要求され、その高さは例えば３００１１１である。Next, the operation of this embodiment will be explained. First, when the converter blowing is completed, the converter 1 is tilted to cause the molten steel 4 to flow out from the tapping port 6. Next, when 80% of the steel has been tapped, a slag outflow prevention device 1 is installed on the slag in the area directly above the tap 6.
Set 0. In this case, the diameter of the tap hole 6 is, for example, 3
00a+a, and the diameter of the stopper 20 is 300111
1. The inner diameter of the cylindrical member 30 is 150 On+m. Further, the height of the cylindrical member 30 is required to be greater than the thickness of the slug 5, and the height is, for example, 300,111.
スラグ流出装置１０を設置した状態で、更に溶ｔＩｌ１
４が流出していくと、ＦｆＪ鋼濶面が低下してｉ流が発
生する高さに達する。この場合に、出鋼口６の直上域の
スラグに筒状部材３０が浸漬されているので、この筒状
部材３０の外側のスラグが出鋼口６に向かって流れ込む
ことが阻止されると共に、渦流の速度が低減される。更
に溶鋼４が流出して実質的にスラグ５のみになった時点
でストッパ２０が出鋼口６を閉塞し、爾後のスラグ５の
流出を防止する。この場合に、鎖４０によりストッパ２
０が筒状部材３０に連結されているのでストッパ２０の
位置が移動する虞が少なくなり確実に出鋼口６が閉塞さ
れる。以上のように、この実施例のスラグ流出防止装置
を使用することによりスラグ５の流出を有効に防止する
ことができる。With the slag outflow device 10 installed, the molten tIl1
As 4 flows out, the FfJ steel surface lowers and reaches a height at which i-flow occurs. In this case, since the cylindrical member 30 is immersed in the slag in the area directly above the tap hole 6, the slag outside the cylindrical member 30 is prevented from flowing toward the tap hole 6, and The velocity of the vortex is reduced. Further, when the molten steel 4 flows out and becomes substantially only the slag 5, the stopper 20 closes the tapping port 6 to prevent the slag 5 from flowing out thereafter. In this case, the chain 40 causes the stopper 2 to
0 is connected to the cylindrical member 30, there is less possibility that the position of the stopper 20 will move, and the tap hole 6 is reliably closed. As described above, by using the slag outflow prevention device of this embodiment, outflow of the slag 5 can be effectively prevented.
次に、この実施例の効果について説明する。第２図は、
横軸に取鍋内のスラグ厚みの平均値をとり、縦軸にチャ
ージ数をとって、スラグ厚みの平均値の分布を示すグラ
フ図である。ここで、白扱きのグラフは実施例を示し、
斜線を施したグラフは従来例を示す。これによれば、従
来の場合にはスラグ厚みの平均値が６０乃至７Ｑｌｌの
場合が最も頻度が高いが、実施例の場合にはスラグ厚み
２０１ｍの以下の頻度が高いことがわかる。このように
、この実施例の場合には、従来と比較してスラグ流出を
防止する効果が極めて高い。Next, the effects of this embodiment will be explained. Figure 2 shows
It is a graph diagram showing the distribution of the average value of slag thickness, with the horizontal axis representing the average value of the slag thickness in the ladle and the vertical axis representing the number of charges. Here, the white graph indicates an example,
Graphs with diagonal lines indicate conventional examples. According to this, it can be seen that in the conventional case, the average value of the slag thickness is 60 to 7 Qll most frequently, but in the case of the example, the frequency is high when the slag thickness is 201 m or less. As described above, this embodiment has an extremely high effect of preventing slag outflow compared to the conventional method.
なお、この実施例では、転炉に適用した場合を示したが
、これに限らず、例えば、ＡＯＤ炉等他の精錬炉にも適
用することができる。また、溶鋼の場合について示した
が、これに限らず、他の金属の出湯にも適用することが
できる。Although this embodiment shows a case where the present invention is applied to a converter, the present invention is not limited to this, and can be applied to other refining furnaces such as an AOD furnace. Further, although the case of molten steel has been described, the present invention is not limited to this and can be applied to tapping of other metals.
［発明の効果］
この発明によれば、出湯口直上域のスラグと溶鋼との間
にストッパを浮遊させると共に、出湯口を含む領域の直
上のスラグを囲繞する状態で筒状部材をスラグに浸漬し
、更に、連結部材によりストッパを出湯口直上域に保持
する。このため、出湯末期に筒状部材の外側のスラグが
出湯口に流れ込むことが阻止されると共に、ストッパが
確実に出湯口を閉塞するから、スラグの流出を有効に防
止することができる。また、精錬炉からのスラグの流出
を減少させるので、取鍋内でスラグを除去する必要がな
く、精錬炉内での溶場温度を上昇させる必要がない。従
って、製品歩留を向上させることができる共に、エネル
ギコストの上昇を防ぐことができる。[Effects of the Invention] According to the present invention, the stopper is suspended between the slag and molten steel in the area directly above the tap, and the cylindrical member is immersed in the slag so as to surround the slag directly above the area including the tap. Furthermore, the stopper is held in an area directly above the tap opening by the connecting member. Therefore, the slag outside the cylindrical member is prevented from flowing into the tap hole at the end of tapping, and since the stopper reliably closes the tap hole, it is possible to effectively prevent the slag from flowing out. Furthermore, since the outflow of slag from the smelting furnace is reduced, there is no need to remove slag in the ladle, and there is no need to increase the melt field temperature within the smelting furnace. Therefore, product yield can be improved and an increase in energy costs can be prevented.
第１図はこの発明の実施例に係るスラグ流出防止装置を
転炉内に設置した状態を示す模式図、第２図はこの発明
の効果を示すグラフ図である。
１；転炉、４；ＦｆＪＩ、５ニスラグ、６；出鋼口、１
０；スラグ流出防止装置、２０ニストツバ、３０：筒状
部材、４０；鎮FIG. 1 is a schematic diagram showing a state in which a slag outflow prevention device according to an embodiment of the present invention is installed in a converter, and FIG. 2 is a graph diagram showing the effects of the present invention. 1; Converter, 4; FfJI, 5 Nisslag, 6; Steel tap, 1
0; Slag outflow prevention device, 20 Nist collar, 30: Cylindrical member, 40;
Claims (1)
ら溶湯を出湯する際に、出湯口から溶湯上に浮遊するス
ラグの流出を防止するスラグ流出防止装置において、ス
ラグ及び溶湯の中間の比重を有し出湯口直上域の溶湯と
スラグとの間に浮遊するストッパと、出湯口の径よりも
大きな内径を有し出湯口直上域のスラグに浸漬され出湯
口を含む領域の直上のスラグ領域を囲繞する筒状部材と
、前記ストッパと筒状部材とを連結しストッパを出湯口
の直上に保持する連結部材とを有することを特徴とする
スラグ流出防止装置。In a slag outflow prevention device that prevents slag floating on the molten metal from flowing out from the tap hole when the tap hole formed in the smelting furnace is directed downward and the molten metal is tapped from the tap hole, a A stopper that has a specific gravity and floats between the molten metal and slag in the area directly above the tap, and a slag that has an inner diameter larger than the diameter of the tap and is immersed in the slag in the area directly above the tap and is directly above the area that includes the tap. A slag outflow prevention device comprising: a cylindrical member that surrounds a region; and a connecting member that connects the stopper and the cylindrical member and holds the stopper directly above a spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6911087A JPS63235420A (en) | 1987-03-25 | 1987-03-25 | Device for preventing flow-out of slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6911087A JPS63235420A (en) | 1987-03-25 | 1987-03-25 | Device for preventing flow-out of slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63235420A true JPS63235420A (en) | 1988-09-30 |
Family
ID=13393161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6911087A Pending JPS63235420A (en) | 1987-03-25 | 1987-03-25 | Device for preventing flow-out of slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63235420A (en) |
-
1987
- 1987-03-25 JP JP6911087A patent/JPS63235420A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5083754A (en) | Apparatus for retaining slag during the discharge of molten metal from a tundish | |
| US4462574A (en) | Method for minimizing slag carryover | |
| JPS6238405B2 (en) | ||
| JP4207820B2 (en) | How to use vacuum degassing equipment | |
| JPS63235420A (en) | Device for preventing flow-out of slag | |
| US4936553A (en) | Method for retaining slag during the discharge of molten metal from a vessel | |
| JPS62230930A (en) | Method for discharging molten metal | |
| JPS63235418A (en) | Refining furnace providing tapping hole | |
| JP2001303122A (en) | Method for preventing flow-out of slag from converter and its device | |
| US4733853A (en) | Molten metal taphole design to improve yield and cleanliness | |
| JPS62230929A (en) | Method for discharging molten metal | |
| JP4333343B2 (en) | Hot metal desiliconization sludge casting method and hot metal desiliconization method using the same | |
| JPH01100216A (en) | Ladle refining method for molten steel | |
| JPH09241720A (en) | Ladle refining apparatus | |
| KR100328938B1 (en) | Device for preventing outflow of slag in converter | |
| US327422A (en) | Converter | |
| JPS59145724A (en) | Cooling method of lance for stirring molten metal | |
| JPS62284009A (en) | Tapping method for molten metal | |
| SU933708A1 (en) | Spout lip | |
| JPH01129921A (en) | Steel tapping hole for converter | |
| JPH01201411A (en) | Method for preventing flow-out of molten slag at the time of steel tapping from refining furnace | |
| JPS59145725A (en) | Cooling method of lance for stirring molten metal | |
| JPS62235413A (en) | Method for adding flux | |
| JPS63250410A (en) | Method for refining in casting bed of blast furnace | |
| JPH0331690A (en) | Cutting of slag and molten metal vessel therefor |