JPH01309779A - Method for preventing sticking of metal to porous plug - Google Patents
Method for preventing sticking of metal to porous plugInfo
- Publication number
- JPH01309779A JPH01309779A JP13912388A JP13912388A JPH01309779A JP H01309779 A JPH01309779 A JP H01309779A JP 13912388 A JP13912388 A JP 13912388A JP 13912388 A JP13912388 A JP 13912388A JP H01309779 A JPH01309779 A JP H01309779A
- Authority
- JP
- Japan
- Prior art keywords
- porous plug
- plug
- metal
- ladle
- molten metal
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 10
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 16
- 239000012768 molten material Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000010953 base metal Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、ポーラスプラグの地金付着防止方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing base metal adhesion to a porous plug.
［従来の技術］
溶湯成分および温度の均一化や介在物分離の促進を目的
として、ポーラスプラグによる取鍋底吹きバブリングが
行われている。取鍋内溶湯のタンディツシュへの鋳造は
、溶湯表面に浮上分離したスラグが鋳造される溶湯中に
混入しないように、取鍋内溶湯のタンディツシュへの鋳
造終了時に取鍋内にスラグと溶湯を残留させる。鋳造終
了後、取鍋内に残留させたスラグおよび溶湯を排出する
が、ポーラスプラグの上表面に、凝固した溶湯が地金と
なって付着し、ポーラスプラグの通気孔を閉塞する。そ
のため、ポーラスプラグに付着した地金を除去しないと
次回のバブリングができないので、通常、ポーラスプラ
グに付着した地金を酸素洗浄により除去している。[Prior Art] Ladle bottom-blowing bubbling using a porous plug has been carried out for the purpose of homogenizing molten metal components and temperature and promoting separation of inclusions. When casting the molten metal in the ladle into the tundish, the slag and molten metal must remain in the ladle when the molten metal in the ladle is finished casting into the tundish so that the slag that has floated to the surface of the molten metal does not mix into the molten metal. let After casting is completed, the slag and molten metal remaining in the ladle are discharged, but the solidified molten metal adheres to the upper surface of the porous plug in the form of bare metal, blocking the vent hole of the porous plug. Therefore, the next bubbling cannot be performed unless the metal base attached to the porous plug is removed, so the base metal adhered to the porous plug is usually removed by oxygen cleaning.
［発明が解決しようとする課題］
しかしながら、ポーラスプラグの上表面を酸素洗浄を行
うと、付着した地金を溶解する際にポーラスプラグの上
表面が酸素洗浄−回当たり１０〜２０ｍｍ溶損する。こ
のため、約８回の受湯でポーラスプラグを交換しなけれ
ばならず、ポーラスプラグの寿命延長ができないという
問題があった。[Problems to be Solved by the Invention] However, when the upper surface of the porous plug is cleaned with oxygen, the upper surface of the porous plug is eroded by 10 to 20 mm per oxygen cleaning when the attached base metal is melted. For this reason, the porous plug had to be replaced after about eight pourings, and there was a problem in that the life of the porous plug could not be extended.
「課題を解決するための手段］
本発明は、上記のような問題点を解決しようとするもの
で、取鍋的溶湯のタンディツシュへの鋳造終了後、取鍋
底部に設置されたポーラスプラグから取鍋内に残留した
スラグ及び溶湯の溶融物にガスを吹込み、前記ポーラス
プラグ上の溶融物を飛散させ、ポーラスプラグ先端の周
囲に凝固層を形成させることを特徴とする。"Means for Solving the Problems" The present invention aims to solve the above-mentioned problems, and after the completion of casting of molten metal in a ladle into a tundish, the present invention provides a means for removing the molten metal from a porous plug installed at the bottom of the ladle. The method is characterized in that gas is blown into the molten slag and molten metal remaining in the pot to scatter the molten material on the porous plug and form a solidified layer around the tip of the porous plug.
［作用コ
取鍋的溶湯の鋳造終了後にポーラスプラグからガスを吹
込むと、ポーラスプラグ上に浮遊した溶融物を吹き飛ば
し、ポーラスプラグ先端周囲の溶融物を冷却して凝固さ
せ、ポーラスプラグ先端を囲む凝固層を形成する。従っ
て、凝固層の外側の溶融物が凝固層に遮られてポーラス
プラグ先端上表面に進入できないので、ポーラスプラグ
先端上表面には地金の付着は発生しない。[Operation: When gas is blown through the porous plug after the ladle-like molten metal casting is finished, the molten material floating on the porous plug is blown away, and the molten material around the tip of the porous plug is cooled and solidified, surrounding the tip of the porous plug. Forms a coagulated layer. Therefore, since the molten material outside the solidified layer is blocked by the solidified layer and cannot enter the upper surface of the tip of the porous plug, no base metal is deposited on the upper surface of the tip of the porous plug.
［実施例］
本発明の実施例を以下に説明する６第１図はポーラスプ
ラグの先端周囲に凝固層が形成された状況を示す図であ
る。１はポーラスプラグ、２はガス吹込み管、３は取鍋
の底部レンガで、ポーラスプラグ１は取鍋の底部レンガ
３に設けられた取鍋内部に開口した取付孔７に挿入固定
されている。４は取鍋底部に残留した溶湯で、５は溶湯
４上に浮遊しているスラグである。取鍋内溶湯の鋳造終
了時には、ポーラスプラグ１上に、溶湯４およびスラグ
５の層が覆っている。[Example] An example of the present invention will be described below. Fig. 1 is a diagram showing a situation in which a solidified layer is formed around the tip of a porous plug. 1 is a porous plug, 2 is a gas blowing pipe, 3 is a bottom brick of the ladle, and the porous plug 1 is inserted and fixed into a mounting hole 7 provided in the bottom brick 3 of the ladle and opened inside the ladle. . 4 is the molten metal remaining at the bottom of the ladle, and 5 is the slag floating on the molten metal 4. At the end of casting the molten metal in the ladle, the porous plug 1 is covered with a layer of molten metal 4 and slag 5.
取鍋的溶湯の鋳造終了後、ポーラスプラグ１からガスを
溶融物内に吹込む。ポーラスプラグ１の先端上表面を覆
っている溶湯４およびスラグ５は、吹き込まれたガスに
よって飛散し、ポーラスプラグ１の先端周囲の溶融物が
ガスによって冷却され、凝固層６を形成する。この凝固
層６は、溶融物がポーラスプラグｌ上表面に流入するの
を防止する。従って、溶湯が地金となってポーラスプラ
グ上の表面を閉塞することがないから、酸素洗浄が不要
となる。第２図は、先端直径１５０ｍｍ。After the ladle-shaped molten metal is cast, gas is blown into the molten metal from the porous plug 1. The molten metal 4 and slag 5 covering the upper surface of the tip of the porous plug 1 are scattered by the blown gas, and the molten material around the tip of the porous plug 1 is cooled by the gas, forming a solidified layer 6. This solidified layer 6 prevents melt from flowing into the upper surface of the porous plug l. Therefore, since the molten metal does not turn into base metal and block the surface on the porous plug, oxygen cleaning becomes unnecessary. Figure 2 shows a tip diameter of 150 mm.
高さ３５０ｍｍのポーラスプラグについて、ガスの吹込
み開始時刻と吹込み可能流量との関係を示したグラフ図
であり、第３図は吹込み可能流量とポーラスプラグの通
気性をチエツクするチエツク通気流量との関係を示した
グラフ図である。This is a graph showing the relationship between the gas blowing start time and the blowable flow rate for a porous plug with a height of 350 mm. Figure 3 is a check ventilation flow rate for checking the blowable flow rate and the air permeability of the porous plug. FIG. 2 is a graph diagram showing the relationship between
チエツク通気流量が１００ ＩＩ ／ｗｉｎ以上である
と次回のバブリングが可能であるから、第２図、第３図
より先端径１５０ｍｍ、高さ３５０ｍｍのポーラスプラ
グについては、ガス吹き込みから３分以内に４００ρ／
ｍｉｎ以上のガスを吹き込めば、酸素洗浄することなく
次回のバブリングが可能となる。If the check ventilation flow rate is 100 II/win or more, the next bubbling is possible, so as shown in Figures 2 and 3, for a porous plug with a tip diameter of 150 mm and a height of 350 mm, 400 rho within 3 minutes after gas blowing. /
If a gas of min or more is blown, the next bubbling can be performed without oxygen cleaning.
第１表に従来法と本発明法のポーラスプラグの持続回数
の結果を示す。この表から明らかなように本発明法は従
来法に比較して持続回数は４回向上している。Table 1 shows the results of the number of times the porous plug lasted for the conventional method and the method of the present invention. As is clear from this table, the method of the present invention improves the number of times the test lasts by 4 times compared to the conventional method.
第 １ 表
［発明の効果］
本発明は、以上のように構成されているから、酸素洗浄
が不要となり、ポーラスプラグの持′続回数は４回向上
している。これにより取鍋の整備時間が短縮されるとい
う効果が得られた。Table 1 [Effects of the Invention] Since the present invention is configured as described above, oxygen cleaning is not necessary, and the number of times the porous plug can be maintained is increased by 4 times. This has the effect of shortening the ladle maintenance time.
第１図は本発明の方法によってポーラスプラグの先端周
囲に形成された凝固層を示す図、第２図はガス吹込み開
始時刻と吹込み流量の関係を示すグラフ図、第３図は吹
込み流量とチエツク通気流量の関係を示すグラフ図であ
る。
１・・・ポーラスプラグ、２・・・ガス吹込み管、３・
・・取鍋底部レンガ、４・・・溶湯、５・・・スラグ、
６・・・凝固層、７・・・取付孔。Fig. 1 is a diagram showing the solidified layer formed around the tip of the porous plug by the method of the present invention, Fig. 2 is a graph showing the relationship between the gas injection start time and the injection flow rate, and Fig. 3 is a graph showing the relationship between the gas injection start time and the injection flow rate. It is a graph diagram showing the relationship between flow rate and check ventilation flow rate. 1... Porous plug, 2... Gas blowing pipe, 3...
... ladle bottom brick, 4... molten metal, 5... slag,
6... Solidified layer, 7... Mounting hole.
Claims (1)
に設置されたポーラスプラグから取鍋内に残留したスラ
グ及び溶湯の溶融物にガスを吹込み、前記ポーラスプラ
グ上の溶融物を飛散させ、ポーラスプラグ先端の周囲に
凝固堰を形成させることを特徴とするポーラスプラグの
地金付着防止方法。After the molten metal in the ladle is cast into the tundish, gas is blown into the slag and molten metal remaining in the ladle from a porous plug installed at the bottom of the ladle, and the molten metal on the porous plug is scattered. A method for preventing metal adhesion of a porous plug, characterized by forming a solidification weir around the tip of the porous plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13912388A JPH01309779A (en) | 1988-06-06 | 1988-06-06 | Method for preventing sticking of metal to porous plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13912388A JPH01309779A (en) | 1988-06-06 | 1988-06-06 | Method for preventing sticking of metal to porous plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01309779A true JPH01309779A (en) | 1989-12-14 |
Family
ID=15238043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13912388A Pending JPH01309779A (en) | 1988-06-06 | 1988-06-06 | Method for preventing sticking of metal to porous plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01309779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122585A (en) * | 2020-09-07 | 2020-12-25 | 宁国市宏达电炉有限公司 | Bottom pouring type induction holding furnace |
-
1988
- 1988-06-06 JP JP13912388A patent/JPH01309779A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122585A (en) * | 2020-09-07 | 2020-12-25 | 宁国市宏达电炉有限公司 | Bottom pouring type induction holding furnace |
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