JP2004306060A - Powder charging device for continuous casting - Google Patents

Powder charging device for continuous casting Download PDF

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Publication number
JP2004306060A
JP2004306060A JP2003101051A JP2003101051A JP2004306060A JP 2004306060 A JP2004306060 A JP 2004306060A JP 2003101051 A JP2003101051 A JP 2003101051A JP 2003101051 A JP2003101051 A JP 2003101051A JP 2004306060 A JP2004306060 A JP 2004306060A
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JP
Japan
Prior art keywords
powder
chute
continuous casting
mold
charging
Prior art date
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JP2003101051A
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Japanese (ja)
Inventor
Sanji Asano
三司 朝野
Toshiki Yamaguchi
俊喜 山口
Takanori Zenmei
孝徳 善明
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.)
Nippon Steel Corp
Nippon Steel Metal Products Co Ltd
Original Assignee
Nippon Steel Corp
Nippon Steel Metal Products Co Ltd
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Priority to JP2003101051A priority Critical patent/JP2004306060A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder charging device for continuous casting where a working space in continuous casting operation can sufficiently be secured, and powder can be scattered over the surface of molten steel in a mold for continuous casting by the gravity of the powder. <P>SOLUTION: In the powder charging device for continuous casting, a powder charging hopper of charging powder to the surface of molten steel in a continuous casting mold is provided, and the powder in the hopper is scattered over the inside of the mold via a charging chute. A tilt obtained by slightly adding an angle to the angle of repose of the powder is applied to the powder discharging chute. Further, the lower end part of the chute is provided with a cylindrical powder retainer, and a powder sprinkler with an upward-pointed conical shape is set in the lower part thereof. The space between the lower end of the retainer and the upper face of the sprinkler is provided with a gap for the falling of the powder. The powder is fallen by gravity with the chute, and is charged to the inside of the mold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、連続鋳造作業において、パウダーの自重により連続鋳造用鋳型内溶鋼表面に、パウダーを散布できる連続鋳造用パウダー投入装置に関するものである。
【0002】
【従来の技術】
鋼の連続鋳造に際しては、連続鋳造モールド(以下単にモールドと呼ぶ)に注入された溶鋼表面へ、SiO 、CaO等を主成分とする連続鋳造用パウダー(以下単にパウダーと呼ぶ)を投入し、溶鋼表面の酸化防止、鋳型内溶鋼中の介在物の吸収並びに、モールド壁と溶鋼間の潤滑等を行わせている。このパウダー投入作業は、以前は人手によって行っていたが、最近はパウダー自動投入装置が開発され、機械的な投入が一般に行われている。
【0003】
従来からパウダー投入装置については種々の特許が提案されており、その例を挙げると、スクリューフィーダを鋳型長辺と直角方向から鋳型内にスプリングフィーダ、スクリューフィーダ等の吐出端を臨ませ、前記フィーダを平行に移動または旋回させることにより、パウダー投入位置を鋳型長辺方向に移動可能とした方式(例えば、特許文献1参照)。
パウダー貯蔵タンクのパウダーを先端が移動可能なパウダー投入シュートに供給機で供給し、プッシャーでモールド内に押出すことにより、溶鋼表面に均一に散布し、必要に応じ所望個所に自動的に投入するもの(例えば、特許文献2参照)。
モールド近傍までスクリューフィーダーによりパウダーを搬送し、旋回装置を介して先端ホッパー下部のプッシャーにてパウダーを押出して、パウダー散布を適切に行うもの(例えば、特許文献3参照)がある。
【0004】
【特許文献1】
実公昭51−48581号公報
【特許文献2】
特公昭60−57937号公報
【特許文献3】
特開平10−43849号公報
【0005】
【発明が解決しようとする課題】
しかして、近年の連続鋳造法における高速鋳造、高品質鋼の鋳造化に当たり、パウダーの重要性が増しており、より高品質のパウダーが使用されつつあり、同時にパウダー投入においても、溶鋼表面(以下単に湯面と呼ぶ)全域にほぼ均一な溶融パウダー層を形成させるために、より高度にかつ、パウダー効果を最大限に発揮する投入方式が要求されている。
さらに、近年鋳造作業の安定化を図るため、種々の測定器具(例えば湯面監視装置など)をモールド近傍へ設置するニーズが増してきており、該装置との干渉を避けるためのスペースを確保する必要性が求められている。
【0006】
前記パウダー投入装置においてはいずれの装置においても、モールド近傍の作業床へ該装置を設置した後、モールド内へパウダーの投入を行なわなければならず、パウダー投入のためには前記装置の移動(常時該装置を設置して置くことは不能)を要する。
従って移動のための動力とパウダー投入のための動力を必要とし、かつ作業床を占有し、他の作業を行うに当って障害となり、実用化に際しては種々の制約を受けると云う欠点を有していた。
【0007】
また、従来の水平形式の投入装置ではスクリューフィーダー等を多用しいるため、駆動装置や回転部が多く機械構造が複雑なため、保守点検に手間や費用が多くかかり、さらに、顆粒状または中空粒状パウダーを使用したときに、スクリューとの接触やパウダー同士の接触にて、パウダーが粉砕し易くなると云う欠陥を有していた。
【0008】
本発明はこれらの従来のパウダー投入設備の欠点を解決を図ると共に、作業性に優れかつ、スペース的に鋳型周辺の自由度が大きく他設備の設置に障害とならず、さらに、装置については保守点検が容易で、パウダーにおいても粉砕され難いパウダー投入装置を提供することを目的とする。
【0009】
【課題を解決するための手段】
本発明は前記した従来方法における問題点を解決するためになされたものであって、その要旨するところは、下記手段にある。
(1) 連続鋳造モールド内の溶鋼表面上に投入するパウダー投入ホッパーと、該投入ホッパー内のパウダーを投入シュートを介して前記モールド内へ散布するパウダー投入装置において、パウダー投入シュートへパウダーの安息角に若干プラスした角度を加えた傾斜を付与し、該シュートでパウダーを自重落下させて投入させる連続鋳造用パウダー投入装置。
(2) 前記パウダー投入シュートの下端部にパウダー滞留器とパウダー散布器から構成したパウダー分配用具を配設した(1)記載の連続鋳造用パウダー投入装置。
(3) 前記パウダー分配用具は、円筒体のパウダー滞留器とその下部に設置した上面円錐形のパウダー散布器からなり、該滞留器の下端と該散布器の上面間に、パウダーが落下するための間隙を設けて構成した(2)記載の連続鋳造用パウダー投入装置。
【0010】
(4) 前記パウダー滞留器は、開口部を鉛直方向とした円筒体に嵌挿管が前記パウダー投入シュートと同じ傾斜角度にて固設し、さらに、ボルト孔が開いた支持板が前記円筒体に固設しており、前記パウダー投入シュートの下端部に前記嵌挿管にて固設している(3)記載の連続鋳造用パウダー投入装置。
(5) 前記パウダー散布器は、前記上面円錐形の斜面部から鉛直方向に懸吊板が前記支持板と側面同士が合致するよう固設し、前記懸吊板にボルト孔が開いている(3)または(4)記載の連続鋳造用パウダー投入装置。
(6) 前記パウダー分配用具は、パウダー投入シュートの下端部と嵌着できる嵌挿管を有せしめた構造としたことを特徴とする(2)ないし(5)のいずれかに記載の連続鋳造用パウダー投入装置。
【0011】
【発明の実施の形態】
以下、本発明のパウダー投入装置の1例について、その構成を機能と共に図面に基づいて説明する。
図1はパウダー投入装置の全体概要を示した側面図で、例えばタンディッシューカー11の架台に設置されたパウダー貯留ホッパー12から適量切り出されたパウダーは、降下管13内を落下し、スクリューフィダーを内装した移送管14内をパウダー投入ホッパー15(以下単に投入ホッパーと呼ぶ)へ送られ、投入ホッパー15の下部からパウダー投入シュート9(以下単にシュートと呼ぶ)から落下しモールド10内へ投入される。なお、19はタンディッシュであり、17は浸漬ノズルである。
【0012】
しかして、投入ホッパー15の下部に取り付けられるシュート9は、パウダーを自重落下させることを狙いとしているので、シュート9の傾斜角αはパウダーの安息角に若干の角度を付加した傾斜を持つ設計を執っており、パウダーは投入ホッパー15から排出されると自然にシュート9内を落下していく。
本発明におけるシュート9の傾斜角αは、シュート9近傍に存在する他の設備との兼ね合いもあるが、前記したパウダーの安息角にプラス1〜8°の角度を付加することにより、パウダーをスムーズにモールド10内へ投入することができる。
【0013】
さらに、パウダーが投入されるモールド10が偏平型の場合は、モールド10の長辺に沿ってパウダーを投入してやらなければならないので、シュート9がモールド10長辺方向に移動(旋回)可能な構造にしている。このため投入ホッパー15の上方には旋回モータ16が装備されており、該モータ16を可動することにより投入ホッパー15を旋回させ、投入ホッパー15の下部に固着されたシュート9も同時に投入ホッパー15中心を軸芯として旋回する。
前記パウダー移送管14と投入ホッパー15とは固定されておらず、該移送管14側の投入ホッパー15の側壁は、旋回代に応じて開口された構造となっており、旋回時に支障となることはない。
【0014】
さらに、図2に示した平面図のように、前記図1のパウダー貯留ホッパー12下部の降下管13以降の装置をモールド10の長辺側に、タンディッシュの浸漬ノズル17を境にして2個設置すると、パウダー投入に当ってシュート9の旋回範囲を少なくできると共に、パウダー投入量が多くなっても時間的に投入時期を失する惧れが少なく望ましい。なお、18は投入ホッパー15を移動するための走行装置である。また、長辺が短いモールドの場合は、シュートが1台であってもパウダーを供給することも可能である。
【0015】
図3はパウダーをモールド10内へ投入(散布)を行うために開発したパウダー分配用具1についてその全体を斜視図で示したもので、パウダー滞留器2(以下単に滞留器と呼ぶ)とパウダー散布器3(以下単に散布器と呼ぶ)から構成されている。該分配用具1はシュート9の先端部に取り付けられるものであり、シュート9(管状体で構成されている)に嵌着する嵌挿管4を滞留器2の片側に固着した構造を有しており、かつ該嵌挿管4はシュート9の傾斜角αと同一角度を持たせている。図4は前記図3について、その平面図(a)と側面図(b)を示したものである。
【0016】
図5,6は前記図3,4の組立て前の滞留器2と散布器3をそれぞれ単体で示したもので、(a)は平面図,(b)は側面図である。しかして、滞留器2は散布器3の形状に合わせて設計されるものであるが、散布器3の上部形状が円錐面体を有している場合は円筒体が適しており、滞留器2の中心と散布器3の中心が合致するよう組立てる。組立に際しては、滞留器2のシュート9側を除いた3方向(角度90°間隔)に、散布器3を支持するための支持板5が滞留器2の外側に固設される。
【0017】
一方、散布器3の上面には前記滞留器2の支持板5に側面同士が合致する懸吊板6が固設されている。しかして、前記支持板5と懸吊板6はボルト・ナット7で固定するが、散布器3の高さ(滞留器2の下端部と散布器3の上面部との間隙t)調整のために、支持板5と懸吊板6にはボルト孔8が高さ方向に長孔が設けられている。
【0018】
前記ボルト孔8に通したボルトの上・下位置を調整することにより、滞留器2と散布器3との間隙tを調整し、パウダーの投入散布量を適切な量とすることができる。また、散布するパウダーはモールド10内湯面上において均一に分布するのが好ましいので、パウダーが滞留器2内において滞留する状態を形成できるようシュート9から落下してくるパウダーの供給量を調整するか、前記滞留器2と散布器3の間隙tを調整することにより、目的を達成することができる。
【0019】
若し、パウダーが滞留器2内に滞留しない状態であると、シュート9内を落下して来たパウダーは、滞留器2のシュート9に近い側から落下する割合が多くなり、パウダーの散布に偏りを生じ均一分布を損ねる。パウダーを散布器3上面から均等に分配させるためには、滞留器2の円筒体の長さを大きくする方が好ましい。また、モールド10内へのパウダー投入は偏平モールド10においては、前記したと同様に旋回モータの旋回力により行うことができる。
【0020】
パウダーの落下を容易とするためには、散布器3の上面の傾斜角はシュート9の傾斜角と略同一またはそれより大きく設定するのが望ましい。また、散布器3の大きさ(円錐面体における仮想低面の直径)は、当然パウダーを投入するモールド10の短辺長さより小さく、パウダーが散布器3上面より落下した時にモールド10外に零れない寸法とする必要がある。
【0021】
シュート9を旋回させながらパウダーをモールド10内湯面へ散布するに当たり、パウダーの均一散布がよりスムーズに行われるようにするためには、図7に平面図で示したように、散布器の形状をモールドの長手方向に沿って長くした楕円錐形としたり、図8に同様に平面図で示したように、滞留器の形状をモールドの長手方向に沿って短くした楕円筒形としたりすることにより、パウダーの落下をスムーズにできる。また図示しないが滞留器の円筒下端部を円弧状に切欠くことによっても同様の効果が得られる。
【0022】
シュートについては通常の形状としては、円筒形が製作上から好ましいが、その他の筒体(例えば角筒)であっても差し支えな。また、材質としては特に拘わらないが、シュートを支持する支持体を有していない(作業スペースを確保するため)のと、高熱雰囲気での使用となるので耐食性、耐熱性を有するもの、またパウダーに対しては滑りが良好で付着し難いもの、例えばステンレス製の管などを用いるとよい。また、長いシュートを必要とする場合には、接手を用いて途中で分割でき、使用時に簡単に接続できるような構成を執ることが望ましい。
【0023】
さらに、パウダー分配用具についてはシュート先端部での取り外しが容易で、シュートの先端部に簡易に取り付けるように構成することによって、モールドサイズが異なった場合、例えば偏平モールドの短辺幅に大幅に差が生じたとき、または、ブルームを鋳造するためのモールドのときなど、それに適合した滞留器、散布器で組立てられたパウダー分配用具に取り替えることにより、パウダー投入作業を支障なく行うことができ、パウダー投入のための作業準備時間の短縮が図られる。
【0024】
【発明の効果】
本発明のパウダー投入装置によれば、従来の水平形式の投入装置に比べ、パウダー移送のための設備費が低廉で済み、また、パウダー供給ホッパーやパウダー移送装置がモールド前面に設置されていないため、モールド周辺の作業床のスペースを充分に確保でき、鋳造作業において他の設備を設置するに当たって妨げとならない。さらに、駆動装置や回転部が少なく機械構造が単純なため、保守点検に手間や費用が少なくて済み、顆粒状や中空粒状パウダーを使用したときにも、パウダーが粉砕し難く、それによりもたらせられる効果は大きい。
【図面の簡単な説明】
【図1】本発明のパウダー投入装置の一実施例を示した概略側面図
【図2】本発明のパウダー投入装置を扁平モールドに適用した場合を示した平面図
【図3】シュートの先端部に取り付けるパウダー分配用具の例を示した斜視図
【図4】図3における平面図と側面図を示した図
【図5】パウダー分配用具を構成する滞留器を単体で示した図
【図6】パウダー分配用具を構成する散布器を単体で示した図
【図7】パウダー分配用具において円筒体滞留器と楕円錐体散布器とを組合せた例を示す図
【図8】パウダー分配用具において楕円筒体滞留器と円錐体散布器とを組合せた例を示す図
【符号の説明】
1 パウダー分配用具
2 パウダー滞留器
3 パウダー散布器
4 嵌挿管
5 支持板
6 懸吊板
7 ボルト・ナット
8 ボルト孔
9 パウダーシュート
10 モールド
11 タンディッシュ架台
12 パウダー貯留ホッパー
13 降下管
14 パウダー移送管
15 パウダー投入ホッパー
16 旋回モータ
17 浸漬ノズル
18 走行装置
19 タンディッシュ
[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting powder feeding apparatus capable of spraying powder on the surface of molten steel in a continuous casting mold by the weight of the powder in the continuous casting operation.
[0002]
[Prior art]
At the time of continuous casting of steel, a powder for continuous casting (hereinafter, simply referred to as powder) containing SiO 2 , CaO, etc. as a main component is poured into the surface of molten steel poured into a continuous casting mold (hereinafter, simply referred to as mold), It prevents oxidation of the molten steel surface, absorbs inclusions in the molten steel in the mold, and lubricates between the mold wall and the molten steel. In the past, this powder inputting work had been performed manually, but recently an automatic powder inputting apparatus has been developed, and mechanical inputting is generally performed.
[0003]
Conventionally, various patents have been proposed for a powder feeding device.For example, a screw feeder faces a discharge end of a spring feeder, a screw feeder, or the like into a mold from a direction perpendicular to a long side of the mold, and the feeder is fed. Are moved in parallel or swiveled so that the powder input position can be moved in the long side direction of the mold (for example, see Patent Document 1).
The powder in the powder storage tank is supplied to a powder input chute with a movable tip by a feeder, and is extruded into a mold with a pusher, so that the powder is evenly distributed on the surface of the molten steel and automatically injected into the desired location as needed. (For example, see Patent Document 2).
There is a method in which powder is conveyed to a vicinity of a mold by a screw feeder, and the powder is extruded by a pusher at a lower portion of a tip hopper through a turning device to appropriately perform powder dispersion (for example, see Patent Document 3).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 51-48581 [Patent Document 2]
Japanese Patent Publication No. 60-57937 [Patent Document 3]
JP-A-10-43849
[Problems to be solved by the invention]
In recent years, the importance of powder has been increasing in high-speed casting and casting of high-quality steel in continuous casting, and higher quality powder is being used. In order to form a substantially uniform molten powder layer over the entire area (hereinafter simply referred to as a molten metal surface), there is a demand for a more advanced feeding method that maximizes the powder effect.
Further, in recent years, in order to stabilize the casting operation, there is an increasing need to install various measuring instruments (for example, a liquid level monitoring device) near the mold, and secure a space for avoiding interference with the device. There is a need.
[0006]
In any of the above-mentioned powder feeding devices, in any device, after installing the device on the work floor near the mold, the powder must be charged into the mold. It is impossible to install and place the device).
Therefore, it has the drawbacks that it requires power for movement and power for powder input, occupies the work floor, hinders other work, and is subject to various restrictions in practical use. I was
[0007]
In addition, since the conventional horizontal type feeding device often uses a screw feeder, etc., there are many driving devices and rotating parts and the mechanical structure is complicated, so maintenance and inspection are troublesome and costly. When a powder was used, it had a defect that the powder was easily crushed by contact with the screw or contact between the powders.
[0008]
The present invention solves these drawbacks of the conventional powder dosing equipment, is excellent in workability, has a large degree of freedom around the mold in terms of space, does not hinder the installation of other equipment, and furthermore, the equipment is maintained. An object of the present invention is to provide a powder charging device that is easy to check and hardly crushed even in powder.
[0009]
[Means for Solving the Problems]
The present invention has been made to solve the problems in the above-mentioned conventional method, and the gist of the invention lies in the following means.
(1) In a powder charging hopper for charging the molten steel surface in the continuous casting mold and a powder charging device for spraying the powder in the charging hopper into the mold via a charging chute, a repose angle of the powder to the powder charging chute. A powder inputting device for continuous casting, in which a slant is added by adding a slight angle to the powder, and the chute is used to drop the powder by its own weight and input the powder.
(2) The powder casting apparatus for continuous casting according to (1), wherein a powder distributing tool including a powder staying device and a powder spreader is disposed at a lower end portion of the powder feeding chute.
(3) The powder dispensing tool is composed of a powder accumulator having a cylindrical shape and a powder disperser having an upper conical shape installed at a lower portion thereof. The powder falls between the lower end of the accumulator and the upper surface of the disperser. The powder feeding device for continuous casting according to (2), wherein the gap is provided.
[0010]
(4) In the powder accumulator, an insertion tube is fixed to a cylindrical body having an opening portion in a vertical direction at the same inclination angle as the powder input chute, and a support plate having a bolt hole is provided on the cylindrical body. The powder casting apparatus for continuous casting according to (3), wherein the powder casting chute is fixed and fixed to the lower end of the powder feeding chute by the fitting tube.
(5) In the powder spreader, a suspension plate is fixed in a vertical direction from the slope of the upper surface conical shape so that the side surfaces thereof coincide with the support plate, and a bolt hole is formed in the suspension plate ( 3) or the powder input device for continuous casting according to (4).
(6) The powder for continuous casting according to any one of (2) to (5), wherein the powder dispensing tool has a structure in which a fitting intubation that can be fitted to a lower end of a powder input chute is provided. Input device.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of the powder dosing device of the present invention will be described with reference to the drawings, together with the functions thereof.
FIG. 1 is a side view showing the overall outline of the powder feeding device. For example, an appropriate amount of powder cut out from a powder storage hopper 12 installed on a gantry of a tundish shaker 11 falls in a downcomer pipe 13 and is fed into a screw feeder. Is transferred to a powder input hopper 15 (hereinafter simply referred to as an input hopper), dropped from a lower portion of the input hopper 15 from a powder input chute 9 (hereinafter simply referred to as a chute), and injected into the mold 10. You. In addition, 19 is a tundish and 17 is a dipping nozzle.
[0012]
However, since the chute 9 attached to the lower part of the input hopper 15 aims to drop the powder by its own weight, the inclination angle α of the chute 9 is designed to have a slight angle of addition to the angle of repose of the powder. When the powder is discharged from the input hopper 15, the powder naturally falls in the chute 9.
Although the inclination angle α of the chute 9 in the present invention has a balance with other equipment existing in the vicinity of the chute 9, by adding an angle of 1 to 8 ° to the angle of repose of the powder, the powder can be smoothed. Into the mold 10.
[0013]
Further, when the mold 10 into which the powder is to be injected is of a flat type, the powder must be injected along the long side of the mold 10, so that the chute 9 can be moved (turned) in the long side direction of the mold 10. ing. For this reason, a turning motor 16 is provided above the charging hopper 15, and the motor 16 is moved to rotate the charging hopper 15, and the chute 9 fixed to the lower portion of the charging hopper 15 is also moved to the center of the charging hopper 15. Turns around the axis.
The powder transfer pipe 14 and the charging hopper 15 are not fixed, and the side wall of the charging hopper 15 on the side of the transfer pipe 14 has a structure that is opened according to a turning margin, which may be an obstacle during turning. There is no.
[0014]
Further, as shown in the plan view of FIG. 2, the apparatus after the downcomer 13 at the lower part of the powder storage hopper 12 of FIG. When installed, it is desirable that the turning range of the chute 9 can be reduced when powder is introduced, and that there is no risk of losing the timing in terms of time even if the amount of powder input increases. Reference numeral 18 denotes a traveling device for moving the charging hopper 15. In the case of a mold having a short long side, powder can be supplied even with a single chute.
[0015]
FIG. 3 is a perspective view showing the whole of a powder dispensing tool 1 developed for putting (spraying) powder into the mold 10, and includes a powder accumulator 2 (hereinafter simply referred to as accumulator) and a powder disperser. 3 (hereinafter simply referred to as a sprayer). The dispensing tool 1 is attached to the tip of the chute 9 and has a structure in which a fitting tube 4 fitted to the chute 9 (constituted of a tubular body) is fixed to one side of the stay 2. The fitting tube 4 has the same angle as the inclination angle α of the chute 9. FIG. 4 is a plan view (a) and a side view (b) of FIG.
[0016]
FIGS. 5 and 6 respectively show the staying device 2 and the sprayer 3 before assembly of FIGS. 3 and 4 as a single unit, where (a) is a plan view and (b) is a side view. Thus, the staying device 2 is designed in accordance with the shape of the sprayer 3, but when the upper shape of the sprayer 3 has a conical surface, a cylindrical body is suitable, and Assemble so that the center and the center of the spreader 3 match. At the time of assembling, support plates 5 for supporting the spreader 3 are fixed to the outside of the staying device 2 in three directions (at 90 ° intervals) except for the chute 9 side of the staying device 2.
[0017]
On the other hand, a suspension plate 6 whose side faces coincide with the support plate 5 of the staying device 2 is fixed on the upper surface of the sprayer 3. The support plate 5 and the suspension plate 6 are fixed with bolts and nuts 7 to adjust the height of the spreader 3 (the gap t between the lower end of the staying device 2 and the upper surface of the spreader 3). In addition, the support plate 5 and the suspension plate 6 are provided with bolt holes 8 which are elongated in the height direction.
[0018]
By adjusting the upper and lower positions of the bolts passed through the bolt holes 8, the gap t between the staying device 2 and the sprayer 3 can be adjusted, and the amount of powder to be sprayed can be made an appropriate amount. Further, since it is preferable that the powder to be sprayed is uniformly distributed on the surface of the molten metal in the mold 10, the supply amount of the powder falling from the chute 9 should be adjusted so that the powder stays in the staying device 2. The purpose can be achieved by adjusting the gap t between the staying device 2 and the sprayer 3.
[0019]
If the powder does not stay in the staying device 2, the rate of the powder falling in the chute 9 from the side near the chute 9 of the staying device 2 increases, and the powder is sprayed. It causes bias and impairs uniform distribution. In order to evenly distribute the powder from the upper surface of the sprayer 3, it is preferable to increase the length of the cylindrical body of the staying device 2. In the flat mold 10, the powder can be injected into the mold 10 by the turning force of the turning motor in the same manner as described above.
[0020]
In order to make the powder fall easily, it is desirable to set the inclination angle of the upper surface of the sprayer 3 to be substantially the same as or larger than the inclination angle of the chute 9. Also, the size of the sprayer 3 (the diameter of the hypothetical low surface in the conical surface) is naturally smaller than the length of the short side of the mold 10 into which the powder is charged, and does not fall out of the mold 10 when the powder falls from the upper surface of the sprayer 3. Must be dimensions.
[0021]
When the powder is sprayed onto the surface of the mold 10 while rotating the chute 9, the shape of the sprayer is changed as shown in the plan view of FIG. By making the shape of the elliptical cone longer along the longitudinal direction of the mold, or by making the shape of the accumulator shorter in the longitudinal direction of the mold as shown in a plan view in FIG. , Make the powder fall smoothly. Although not shown, the same effect can be obtained by notching the lower end of the cylinder of the accumulator in an arc shape.
[0022]
As for the chute, as a usual shape, a cylindrical shape is preferable in terms of production, but other cylindrical bodies (for example, square cylinders) may be used. Although the material is not particularly limited, it does not have a support for supporting the chute (to secure a working space), and because it is used in a high-temperature atmosphere, it has corrosion resistance and heat resistance, and powder. It is good to use what has good slippage and does not adhere easily, for example, a stainless steel tube. When a long chute is required, it is desirable to adopt a configuration that can be divided on the way using a joint and can be easily connected at the time of use.
[0023]
Furthermore, the powder dispensing tool is configured to be easily detached at the tip of the chute and easily attached to the tip of the chute, so that when the mold size differs, for example, the short side width of the flat mold is greatly reduced. When powder occurs, or when molding a bloom, for example, by replacing the powder dispensing tool assembled with a stagnant device and a sprayer suitable for it, it is possible to perform the powder input work without any trouble. The work preparation time for inputting can be reduced.
[0024]
【The invention's effect】
According to the powder dosing device of the present invention, compared to the conventional horizontal dosing device, the equipment cost for powder transfer is low, and the powder supply hopper and the powder transferring device are not installed on the front of the mold. In addition, the work floor space around the mold can be sufficiently ensured, and it does not hinder installation of other equipment in the casting operation. Furthermore, since there are few drive units and rotating parts and the mechanical structure is simple, maintenance work and costs are reduced, and even when granular or hollow granular powder is used, the powder is hard to be crushed. The effect is great.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an embodiment of a powder feeding device of the present invention. FIG. 2 is a plan view showing a case where the powder feeding device of the present invention is applied to a flat mold. FIG. FIG. 4 is a perspective view showing an example of a powder dispensing tool attached to the apparatus. FIG. 4 is a plan view and a side view of FIG. 3; FIG. FIG. 7 is a diagram showing an example of a disperser constituting a powder dispensing device alone. FIG. 7 is a diagram showing an example in which a cylindrical staying device and an elliptical cone disperser are combined in the powder dispensing device. FIG. 8 is an elliptic cylinder in the powder dispensing device. The figure which shows the example which combined the body staying device and the cone sprayer.
REFERENCE SIGNS LIST 1 powder dispensing tool 2 powder accumulator 3 powder disperser 4 fitting / intubation 5 support plate 6 suspension plate 7 bolt / nut 8 bolt hole 9 powder chute 10 mold 11 tundish gantry 12 powder storage hopper 13 downcomer 14 powder transfer tube 15 Powder input hopper 16 Rotating motor 17 Immersion nozzle 18 Traveling device 19 Tundish

Claims (6)

連続鋳造モールド内の溶鋼表面上に投入するパウダー投入ホッパーと、該投入ホッパー内のパウダーを投入シュートを介して前記モールド内へ散布するパウダー投入装置において、パウダー投入シュートへパウダーの安息角に若干プラスした角度を加えた傾斜を付与し、該シュートでパウダーを自重落下させて投入させることを特徴とする連続鋳造用パウダー投入装置。In a powder charging hopper for charging the molten steel surface in the continuous casting mold and a powder charging device for dispersing the powder in the charging hopper into the mold via a charging chute, the angle of repose of the powder is slightly added to the powder charging chute. A powder which is dropped by its own weight with the chute and is thrown in by the chute. 前記パウダー投入シュートの下端部にパウダー滞留器とパウダー散布器から構成したパウダー分配用具を配設したことを特徴とする請求項1記載の連続鋳造用パウダー投入装置。2. The powder casting apparatus for continuous casting according to claim 1, wherein a powder dispensing tool comprising a powder staying device and a powder spreader is disposed at a lower end portion of said powder feeding chute. 前記パウダー分配用具は、円筒体のパウダー滞留器とその下部に設置した上面円錐形のパウダー散布器からなり、該滞留器の下端と該散布器の上面間に、パウダーが落下するための間隙を設けて構成したことを特徴とする請求項2記載の連続鋳造用パウダー投入装置。The powder dispensing tool comprises a powder accumulator having a cylindrical shape and a powder disperser having a conical upper surface installed at a lower portion thereof. 3. The powder feeding device for continuous casting according to claim 2, wherein the powder feeding device is provided. 前記パウダー滞留器は、開口部を鉛直方向とした円筒体に嵌挿管が前記パウダー投入シュートと同じ傾斜角度にて固設し、さらに、ボルト孔が開いた支持板が前記円筒体に固設しており、前記パウダー投入シュートの下端部に前記嵌挿管にて固設していることを特徴とする請求項3記載の連続鋳造用パウダー投入装置。In the powder accumulator, an insertion tube is fixed to a cylindrical body having an opening portion in a vertical direction at the same inclination angle as the powder input chute, and a support plate having a bolt hole is fixed to the cylindrical body. The powder casting apparatus for continuous casting according to claim 3, wherein the fitting pipe is fixed to a lower end of the powder feeding chute by the fitting tube. 前記パウダー散布器は、前記上面円錐形の斜面部から鉛直方向に懸吊板が前記支持板と側面同士が合致するよう固設し、前記懸吊板にボルト孔が開いていることを特徴とする請求項3または4記載の連続鋳造用パウダー投入装置。The powder sprayer is characterized in that a suspension plate is fixed vertically from the slope of the upper surface conical shape so that the side surfaces thereof coincide with the support plate, and a bolt hole is opened in the suspension plate. The powder feeding device for continuous casting according to claim 3 or 4, wherein 前記パウダー分配用具は、パウダー投入シュートの下端部と嵌着できる嵌挿管を有せしめた構造としたことを特徴とする請求項2ないし5のいずれかに記載の連続鋳造用パウダー投入装置。6. The powder casting apparatus for continuous casting according to claim 2, wherein the powder dispensing tool has a structure in which a fitting intubation that can be fitted to a lower end of the powder loading chute is provided.
JP2003101051A 2003-04-04 2003-04-04 Powder charging device for continuous casting Withdrawn JP2004306060A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008154810A1 (en) * 2007-06-16 2008-12-24 Zhiheng Tian Automatic powder feeding apparatus for large sectional crystallizer
JP2010269354A (en) * 2009-05-22 2010-12-02 Nippon Steel Corp Method for preventing pulverization of mold powder for continuous casting
WO2011145145A1 (en) * 2010-05-20 2011-11-24 新日本製鐵株式会社 Flux loading device, continuous casting device, flux loading method, and continuous casting method
CN103464703A (en) * 2013-08-15 2013-12-25 浙江金磊高温材料股份有限公司 Casting powder automatic feeding device of continuous casting machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008154810A1 (en) * 2007-06-16 2008-12-24 Zhiheng Tian Automatic powder feeding apparatus for large sectional crystallizer
JP2010269354A (en) * 2009-05-22 2010-12-02 Nippon Steel Corp Method for preventing pulverization of mold powder for continuous casting
WO2011145145A1 (en) * 2010-05-20 2011-11-24 新日本製鐵株式会社 Flux loading device, continuous casting device, flux loading method, and continuous casting method
JP4920801B2 (en) * 2010-05-20 2012-04-18 新日本製鐵株式会社 Flux feeding apparatus, continuous casting equipment, flux feeding method, and continuous casting method
CN102883837A (en) * 2010-05-20 2013-01-16 新日铁住金株式会社 Flux loading device, continuous casting device, flux loading method, and continuous casting method
CN102883837B (en) * 2010-05-20 2015-03-18 新日铁住金株式会社 Flux loading device, continuous casting device, flux loading method, and continuous casting method
CN103464703A (en) * 2013-08-15 2013-12-25 浙江金磊高温材料股份有限公司 Casting powder automatic feeding device of continuous casting machine

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