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JP3612975B2 - Dust collector for ladle - Google Patents
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JP3612975B2 - Dust collector for ladle - Google Patents

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Publication number
JP3612975B2
JP3612975B2 JP00152198A JP152198A JP3612975B2 JP 3612975 B2 JP3612975 B2 JP 3612975B2 JP 00152198 A JP00152198 A JP 00152198A JP 152198 A JP152198 A JP 152198A JP 3612975 B2 JP3612975 B2 JP 3612975B2
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Japan
Prior art keywords
ladle
dust
dust collecting
collecting hood
cooling
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 - Fee Related
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JP00152198A
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Japanese (ja)
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JPH1112636A (en
Inventor
崇生 弓手
朋典 神山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
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JFE Steel Corp
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Filing date
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Priority to JP00152198A priority Critical patent/JP3612975B2/en
Publication of JPH1112636A publication Critical patent/JPH1112636A/en
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  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、取鍋用集塵装置に関し、特に、使用後の取鍋の冷却に有効な取鍋用集塵装置に係わる。
【0002】
【従来の技術】
以前は、溶融金属の精錬や搬送に使用した取鍋の冷却は、大気中に該取鍋を一定時間放置することで行っていた。ところが、この方法では、冷却が遅く、取鍋に内張りされたレンガ等、耐火物の修理(交換も含む)に取りかかるまでに、かなり長い冷却時間を要し、該取鍋の回転率(同一鍋の使用率)が低下してしまう。また、その際、取鍋内に残留している金属粉、あるいは非金属の混合物が、取鍋内の上昇気流によって取鍋外へダストととして飛散する。この取鍋外へのダストの飛散を防止するために、例えば、特開平7−151473号公報及び特開平8−14773号公報は、蓋、あるいは集塵フード等で該取鍋の上部を囲い、その内部雰囲気を吸気集塵することを提案した。
【0003】
しかしながら、かかる集塵方法を用いると、取鍋内のガスの流れが自然放置の場合と異なるためか、該取鍋からの熱放散に長時間を要し、ますます冷却が遅くなるという問題があった。
【0004】
【発明が解決しようとする課題】
本発明は、かかる事情に鑑み、従来より取鍋を迅速に冷却可能な取鍋用集塵装置を提供することを目的としている。
【0005】
【課題を解決するための手段】
発明者は、前記目的を達成するため、使用後取鍋の冷却中に実施する従来の集塵方法を見直した。その結果、取鍋の上部をほぼ完全に覆う集塵フードの使用に問題があることに気がついた。つまり、低温且つ新鮮な空気の吸引が極めて少ないため、取鍋の冷却が遅いと考えた。そして、この考えに着眼し、対策の発見に鋭意努力し、本発明を完成させた。
【0006】
すなわち、本発明は、取鍋の上部を覆い、該取鍋内を吸気するために使用する集塵フードと、吸気手段とからなる取鍋用集塵装置において、前記集塵フードに、該集塵フードを貫通して取鍋内に冷却用空気を導く送風ダクトと、該冷却用空気を供給する送風ブロアとを備えたことを特徴とする取鍋用集塵装置である。
また、本発明は、前記集塵フードの位置を、取鍋の位置に応じて移動自在とする昇降手段及び旋回手段を備えたことを特徴とする取鍋用集塵装置である。
【0007】
さらに、本発明は、前記集塵フードの形状を笠型とし、該笠型の頂角(θ)を140°〜160°としてなることを特徴とする取鍋用集塵装置である。
加えて、本発明は、前記笠型の中心に吸気ダクトを設けてなることを特徴とする取鍋用集塵装置でもある。
本発明では、冷却中の取鍋内に新鮮な外気を導入し、同時に上部の集塵フードより導入した外気量以上のガス量を排気するようにしたので、取鍋から外部への発塵を防止しつつ、迅速な冷却ができるようになる。また、該集塵フードの形状を笠型とし、その頂点角を140〜160°としたので、取鍋内での空気循環、や外部への排気が円滑になり、その結果、前記冷却効果が一層促進されるようになる。
【0008】
【発明の実施の形態】
図1(a)に、本発明に係る取鍋用集塵装置の一例を縦断面で示す。
まず、それは、取鍋1の上部を覆い、該取鍋1内を吸気するために使用する集塵フード4と、吸気手段(図示しないが、例えば吸引ブロア)とで形成されている。そして、本発明のポイントは、該集塵フード4に、該集塵フード4を貫通して取鍋1内に冷却用空気を導く送風ダクト10aと、該冷却用空気を供給する送風ブロア8とを別途備えたことである。これによって、温度が室温程度で、且つ新鮮な外気11を送風ブロア8により前記ダクト10aを介して取鍋1内の底まで強制的に供給され、上昇気流となって集塵フード4から排気される。その結果、取鍋1の壁及び底部の耐火物2(レンガを含む)は、該外気11に熱が奪われ冷却が促進する。また、集塵フード4と取鍋1上部は殆ど密接しているので、ダストが外部へ逃げることもない。
【0009】
次に、本発明に係る取鍋集塵装置は、別途図2に示すように、取鍋1をクレーン(図示せず)によって冷却場に配置する際に集塵フード4を退避させるため、該集塵フード4に旋回手段5(例えば、シャフトに回転ギア)が設けられている。また、前記したように、送風ダクト10aの外気吐出口を取鍋1内にある程度深く挿入する必要があるので、図2の装置には、該集塵フード4の昇降手段6(スプライン・シャフト9方式)も設置してある。なお、この旋回に用いる駆動モーターは地上に置かれているので、該集塵フード4は、前記スプライン・シャフト9によって昇降させるようになっている。また、前記例では、旋回−昇降式集塵フード4の例であるが、本発明はこれに限るものではなく、スライド式等の集塵フード4を使用しても良い。
【0010】
さらに、発明者は、集塵フードの形状に着眼して、取鍋内での空気循環、排気を効率良く行い、上記した冷却効果をさらに促進させることを検討した。その結果、集塵フード4の形状としては、図3に示すような平型の集塵フード10bよりも、笠型の方10aが有効であることがわかった。しかも、図1(b)に示す該笠型の頂角(θ)は、140°〜160°の範囲にあることが好ましいこともわかった。160°を超えると、平型に近く空気の流れに澱みが発生し、空気の循環が円滑にならない、また140°未満では、循環より排気の流れが優先し、同様に空気の円滑な循環にならないからである。なお、吸気ダクトの笠型集塵フードへの取付け位置は、その中心とするのが好ましい。さもなくば、笠型にした冷却効果が低減していくからである。
【0011】
【実施例】
図1〜2に示した本発明に係る取鍋集塵装置を実際に操業で使用し、その結果を、取鍋1に内張りした耐火物2(レンガ)の温度推移で評価し、図4に示す。また、図4には、その使用効果を比較するため、自然放冷及び従来の集塵装置で冷却した場合(外気導入がない、特開平7−151473号公報記載のもの)の結果も同時に示した。
【0012】
図4より、自然放冷した場合に比較し、従来の集塵装置を設置した場合は、耐火物2の100℃への到達時間が約6時間も長くなっており、冷却に約30時間かかっている。これに対して、本発明に係る送風ブロア8及び送風ダクト10aを設置し、集塵フード4の前記頂角を150°とした場合は、取鍋1の冷却所要時間が約16時間となり、大幅な冷却時間の短縮が確認できた。
【0013】
また、表1に、笠型集塵フードの頂角を種々変更した場合の取鍋の冷却時間を一括してしめした。表1より、本発明に係る集塵装置のうちでも、頂角(θ)が140°〜160°のものが最も適切であることが明らかであろう。
さらに、自然放冷時には、ダストが激しく飛散していたが、本発明に係る取鍋集塵装置の使用時には、発塵がまったく観察されなかった。
【0014】
【表1】

Figure 0003612975
【0015】
【発明の効果】
以上述べたように、本発明により、溶融金属の精錬や搬送に使用した取鍋を、発塵させることなく、短時間で冷却できるようになった。その結果、取鍋の補修時間が短縮されたばかりでなく、取鍋の所謂回転率が向上し、操業コストの削減が達成された。
【図面の簡単な説明】
【図1】本発明に係る取鍋用集塵装置を示す図であり、(a)は縦断面図、(b)は笠型の頂角の説明である。
【図2】本発明に係る取鍋用集塵装置の別態様を示す縦断面図である。
【図3】集塵フードの形状を平型とした取鍋用集塵装置の縦断面図である。
【図4】本発明に係る取鍋用集塵装置の使用効果を示す図である。
【符号の説明】
1 取鍋
2 耐火物(レンガ)
3 残留物
4 集塵フード
4a 笠型の集塵フード
4b 平型の集塵フード
5 旋回装置
6 昇降手段
7 ガイド・ブッシュ
8 送風ブロア
9 旋回用スプライン・シャフト
10a 送風ダクト
10b 排気ダクト
11 空気の循環流を示す矢印[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collector for a ladle, and more particularly to a dust collector for a ladle that is effective for cooling the ladle after use.
[0002]
[Prior art]
Previously, the ladle used for refining and transporting molten metal was cooled by leaving the ladle in the atmosphere for a certain period of time. However, in this method, the cooling is slow, and it takes a considerably long cooling time to start repairing (including replacement) refractories such as bricks lining the ladle. Usage rate). At that time, the metal powder or non-metallic mixture remaining in the ladle is scattered out of the ladle as dust by the rising air current in the ladle. In order to prevent scattering of dust to the outside of the ladle, for example, JP-A-7-151473 and JP-A-8-14773 enclose the upper part of the ladle with a lid or a dust collecting hood, It was proposed that the inside atmosphere be collected by intake air.
[0003]
However, if such a dust collection method is used, the gas flow in the ladle is different from that in the case of natural storage, so it takes a long time to dissipate the heat from the ladle and the cooling becomes slower. there were.
[0004]
[Problems to be solved by the invention]
In view of such circumstances, an object of the present invention is to provide a dust collector for a ladle that can cool the ladle quickly.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the inventor has reviewed a conventional dust collection method that is performed during cooling of the ladle after use. As a result, I realized that there was a problem with the use of a dust collection hood that almost completely covered the top of the ladle. That is, it was considered that the ladle cooling was slow because the suction of low temperature and fresh air was very small. With this idea in mind, the present inventors completed the present invention by diligently discovering countermeasures.
[0006]
That is, the present invention provides a dust collecting hood for a ladle that covers an upper portion of a ladle and is used for sucking the inside of the ladle and an intake means, and the dust collecting hood includes the dust collecting hood. A dust collector for a ladle comprising a blower duct for passing cooling air into the ladle through a dust hood, and a blower blower for supplying the cooling air.
In addition, the present invention is a dust collecting apparatus for a ladle comprising a lifting and lowering means and a turning means that allow the dust collecting hood to be moved in accordance with the position of the ladle.
[0007]
Furthermore, the present invention is the dust collecting apparatus for ladle, wherein the shape of the dust collecting hood is a cap shape, and the apex angle (θ) of the cap shape is 140 ° to 160 °.
In addition, the present invention is also a dust collector for a ladle, characterized in that an intake duct is provided at the center of the shade shape.
In the present invention, fresh outside air is introduced into the cooling ladle, and at the same time, the amount of gas exceeding the amount of outside air introduced from the upper dust collecting hood is exhausted. This makes it possible to cool quickly. In addition, since the shape of the dust collecting hood is a shade shape and the apex angle is 140 to 160 °, air circulation in the ladle and exhaust to the outside become smooth, and as a result, the cooling effect is It will be further promoted.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1 (a), an example of the dust collecting apparatus for ladles which concerns on this invention is shown with a longitudinal cross section.
First, it covers the upper portion of the ladle 1 and is formed by a dust collection hood 4 used for sucking the inside of the ladle 1 and an intake means (not shown, for example, a suction blower). And the point of the present invention is that the dust collection hood 4 is blown through the dust collection hood 4 to guide the cooling air into the ladle 1 and the blower blower 8 is configured to supply the cooling air. Is provided separately. As a result, fresh outside air 11 having a temperature of about room temperature is forcibly supplied to the bottom of the ladle 1 through the duct 10a by the blower blower 8, and is exhausted from the dust collecting hood 4 as an updraft. The As a result, the refractory 2 (including bricks) on the wall and bottom of the ladle 1 is deprived of heat by the outside air 11 and promotes cooling. Moreover, since the dust collection hood 4 and the upper part of the ladle 1 are almost closely contacted, dust does not escape to the outside.
[0009]
Next, as shown in FIG. 2, the ladle dust collecting apparatus according to the present invention retracts the dust collecting hood 4 when the ladle 1 is placed in a cooling field by a crane (not shown). The dust collecting hood 4 is provided with swiveling means 5 (for example, a rotating gear on the shaft). Further, as described above, since it is necessary to insert the outside air discharge port of the air duct 10a into the pan 1 to some extent, the lifting / lowering means 6 (spline shaft 9) of the dust collecting hood 4 is included in the apparatus of FIG. System) is also installed. Since the drive motor used for the turning is placed on the ground, the dust collecting hood 4 is moved up and down by the spline shaft 9. Moreover, in the said example, although it is an example of the swivel-lifting type dust collection hood 4, this invention is not limited to this, You may use dust collection hoods 4 of a slide type.
[0010]
Furthermore, the inventor focused on the shape of the dust collecting hood, and studied to further promote the cooling effect described above by efficiently circulating and exhausting air in the ladle. As a result, it was found that the shade-shaped hood 4 is more effective as the shape of the dust-collecting hood 4 than the flat dust-collecting hood 10b as shown in FIG. Moreover, it has also been found that the apex angle (θ) of the shade shown in FIG. 1 (b) is preferably in the range of 140 ° to 160 °. If the angle exceeds 160 °, the air flow will be stagnant and the air circulation will not be smooth, and if it is less than 140 °, the exhaust flow will have priority over the circulation, and the air circulation will be smooth as well. Because it will not be. It should be noted that the attachment position of the intake duct to the shade-type dust collection hood is preferably the center. Otherwise, the cooling effect of the shade shape will decrease.
[0011]
【Example】
The ladle dust collecting apparatus according to the present invention shown in FIGS. 1 and 2 is actually used in operation, and the result is evaluated by the temperature transition of the refractory 2 (brick) lining the ladle 1, and FIG. Show. FIG. 4 also shows the results of natural cooling and cooling with a conventional dust collector (no introduction of outside air, as described in JP-A-7-151473) for comparison of the effect of use. It was.
[0012]
From FIG. 4, when the conventional dust collector is installed, it takes about 6 hours for the refractory 2 to reach 100 ° C., and it takes about 30 hours for cooling. ing. On the other hand, when the blower blower 8 and the blower duct 10a according to the present invention are installed and the apex angle of the dust collecting hood 4 is set to 150 °, the time required for cooling the ladle 1 is about 16 hours. The reduction of the cooling time was confirmed.
[0013]
Table 1 shows the cooling time of the ladle when the top angle of the shade-type dust collection hood is variously changed. From Table 1, it will be clear that among the dust collectors according to the present invention, those having an apex angle (θ) of 140 ° to 160 ° are most suitable.
In addition, dust was violently scattered during natural cooling, but no dust generation was observed when the ladle dust collecting apparatus according to the present invention was used.
[0014]
[Table 1]
Figure 0003612975
[0015]
【The invention's effect】
As described above, according to the present invention, a ladle used for refining or transporting molten metal can be cooled in a short time without generating dust. As a result, not only the ladle repair time was shortened, but also the so-called rotation rate of the ladle was improved, and the operation cost was reduced.
[Brief description of the drawings]
1A and 1B are views showing a dust collecting apparatus for a ladle according to the present invention, in which FIG. 1A is a longitudinal sectional view, and FIG.
FIG. 2 is a longitudinal sectional view showing another embodiment of the dust collecting apparatus for ladle according to the present invention.
FIG. 3 is a longitudinal sectional view of a dust collecting apparatus for a ladle in which the shape of the dust collecting hood is a flat type.
FIG. 4 is a view showing the use effect of the ladle dust collector according to the present invention.
[Explanation of symbols]
1 Ladle 2 Refractory (Brick)
3 Residue 4 Dust collection hood 4a Shade type dust collection hood 4b Flat type dust collection hood 5 Swivel device 6 Lifting means 7 Guide bush 8 Blower blower 9 Swivel spline shaft 10a Blower duct 10b Exhaust duct 11 Air circulation Flow arrows

Claims (4)

取鍋の上部を覆い、該取鍋内を吸気するために使用する集塵フードと、吸気手段とからなる取鍋用集塵装置において、
前記集塵フードに、該集塵フードを貫通して取鍋内に冷却用空気を導く送風ダクトと、該冷却用空気を供給する送風ブロアとを備えたことを特徴とする取鍋用集塵装置。
In the dust collector for the ladle, which covers the upper part of the ladle and is used for sucking the inside of the ladle and the intake means,
The dust collecting hood comprises a dust duct that passes through the dust collecting hood and guides cooling air into the ladle, and a blower blower that supplies the cooling air. apparatus.
前記集塵フードの位置を、取鍋の位置に応じて移動自在とする昇降手段及び旋回手段を備えたことを特徴とする請求項1記載の取鍋用集塵装置。The dust collecting apparatus for a ladle according to claim 1, further comprising an elevating means and a turning means for allowing the dust collecting hood to move in accordance with the position of the ladle. 前記集塵フードの形状を笠型とし、該笠型の頂角を140°〜160°としてなることを特徴とする請求項1又は2記載の取鍋用集塵装置。The dust collector for a ladle according to claim 1 or 2, wherein the shape of the dust collecting hood is a shade shape, and the top angle of the shade shape is 140 ° to 160 °. 前記笠型の中心に吸気ダクトを設けてなることを特徴とする請求項1〜3いずれかに記載の取鍋用集塵装置。The dust collector for a ladle according to any one of claims 1 to 3, wherein an air intake duct is provided at the center of the shade shape.
JP00152198A 1997-04-28 1998-01-07 Dust collector for ladle Expired - Fee Related JP3612975B2 (en)

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Application Number Priority Date Filing Date Title
JP00152198A JP3612975B2 (en) 1997-04-28 1998-01-07 Dust collector for ladle

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Application Number Priority Date Filing Date Title
JP11128797 1997-04-28
JP9-111287 1997-04-28
JP00152198A JP3612975B2 (en) 1997-04-28 1998-01-07 Dust collector for ladle

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JP3612975B2 true JP3612975B2 (en) 2005-01-26

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CN114452765A (en) * 2022-02-21 2022-05-10 宁夏参进宁宇达冶金有限公司 Silicon-manganese alloy ingot mold waste gas and foundry ladle waste gas collecting and treating process
CN114985689A (en) * 2022-05-16 2022-09-02 浙江天能电源材料有限公司 Lead ingot continuous casting machine set

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