JPH06159951A - Monitoring method for transfer of molten metal between containers - Google Patents
Monitoring method for transfer of molten metal between containersInfo
- Publication number
- JPH06159951A JPH06159951A JP31905792A JP31905792A JPH06159951A JP H06159951 A JPH06159951 A JP H06159951A JP 31905792 A JP31905792 A JP 31905792A JP 31905792 A JP31905792 A JP 31905792A JP H06159951 A JPH06159951 A JP H06159951A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- flux
- container
- containers
- upper container
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融金属の容器間移し
替えを自動的に行う際の溶融金属流の監視方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for monitoring a molten metal flow when automatically transferring molten metal between containers.
【０００２】[0002]
【従来の技術】溶融金属を加工して金属製品を製造する
場合、例えば製鉄業であると、溶銑を溶鋼に精錬し鋳造
するまでの過程において、出銑樋から取鍋あるいはトピ
ードカーへ、取鍋あるいはトピードカーから取鍋へ、取
鍋から転炉へ、転炉から取鍋へ、取鍋からタンデイシュ
へと溶融金属が移し替えされる。2. Description of the Related Art In the case of manufacturing a metal product by processing molten metal, for example, in the iron making industry, in the process of refining hot metal into molten steel and casting it, a ladle to ladle or tope car Alternatively, molten metal is transferred from the toped car to the ladle, from the ladle to the converter, from the converter to the ladle, and from the ladle to the tundish.
【０００３】かかる上位容器から下位容器への溶融金属
の移し替えに際して、例えば下位容器の設置，上位容器
の傾動操作は、操作者が経験と目視判断で行っているの
が現状である。この人的操作を自動操作で行う手段とし
て、例えば実開昭６２−１４４９６６号公報の装置が提
案されている。これは、転炉を傾動して取鍋に自動出鋼
する手段として、溶鋼落下軌跡を撮像し、この画像信号
を処理して落下流の上下２点を演算して落下点を求め、
この落下点に副原料を投入するシュートを制御すること
を開示している。In transferring the molten metal from the upper container to the lower container, for example, the installation of the lower container and the tilting operation of the upper container are currently performed by an operator based on experience and visual judgment. As a means for performing this manual operation by an automatic operation, for example, a device disclosed in Japanese Utility Model Laid-Open No. 62-144966 is proposed. This is a means for tilting the converter and automatically tapping the molten steel onto the ladle, imaging the molten steel drop trajectory, processing this image signal, computing the upper and lower two points of the drop flow, and obtaining the drop point.
It is disclosed to control the chute for feeding the auxiliary raw material to this drop point.
【０００４】ところが、図４に示すように、かかる上位
容器１から下位容器２への溶融金属の移し替えに際して
は、溶融金属流束３が常に正常な流束で自由落下してい
るとは限らず、まず、流出開始から定常流になるまで、
あるいは定常流から流出終了になるまでは不安定な流れ
となったりする。また上位容器１の流出口部から該容器
側面に沿って流れる垂れ１３を発生し、下位容器２に収
容されないこともある。 また、図３に示すように、溶
融金属の流出口部に地金とか滓１４が付着していると、
該付着物１４に衝突した溶融金属流束３は分流３’とな
って自由落下し、上位容器１の傾動度合いに応じて分流
角度が広がり、一部の分流３’は下位容器２に収容され
なかったりする。また上記付着物１４に衝突した溶融金
属が分流しなかったとしても、図示していないが、自由
落下流束が乱れた分散流となって、下位容器２の周辺に
溶融金属粒子が飛散するというトラブルを発生する。However, as shown in FIG. 4, when the molten metal is transferred from the upper container 1 to the lower container 2, the molten metal flux 3 is not always free-falling at a normal flux. First, from the start of outflow to the steady flow,
Or, the flow becomes unstable from the steady flow to the end of the outflow. In addition, there may be a case in which a sag 13 that flows along the side surface of the container from the outlet of the upper container 1 is generated and is not accommodated in the lower container 2. In addition, as shown in FIG. 3, when the metal or the slag 14 adheres to the molten metal outlet,
The molten metal flux 3 that collides with the deposit 14 becomes a shunt 3 ′ and falls freely, the shunt angle widens according to the degree of tilt of the upper container 1, and a part of the shunt 3 ′ is accommodated in the lower container 2. There are none. Even if the molten metal colliding with the deposit 14 is not split, although not shown, the free-falling flux becomes a disturbed dispersed flow, and the molten metal particles are scattered around the lower container 2. Cause trouble.
【０００５】[0005]
【発明が解決しようとする課題】上記したような溶融金
属流の垂れ，分流あるいは飛散流は、作業者が常時監視
している場合において発見でき、必要な操作が採れる
が、熟練と人手を要する。また上記実開昭６２−１４４
９６６号公報の装置では最早監視できない。The above-mentioned dripping, splitting, or scattered flow of the molten metal flow can be found when the operator is constantly monitoring it, and the required operation can be taken, but skill and manpower are required. . In addition, the above-mentioned actual development 62-144
The device of the '966 publication can no longer be monitored.
【０００６】本発明は、上記溶融金属流の垂れ，分流あ
るいは飛散流等の溶融金属の流束を的確に監視把握し、
その監視結果にもとづいて最適な操作を選択実施する方
法を提供するものである。The present invention accurately monitors and grasps the flux of the molten metal such as the dripping, splitting or scattered flow of the molten metal flow,
It is intended to provide a method for selecting and executing an optimum operation based on the monitoring result.
【０００７】[0007]
【課題を解決するための手段】本発明は、上位容器から
下位容器に溶融金属を移し替える際に、上位容器から自
由落下する容融金属流束を二方面から各撮像機を用いて
所定視野範囲を撮像し、該撮像信号から溶融金属流束の
位置，形状を画像処理を用いて計測し、該計測結果と溶
融金属の設定流束の全容と比較演算することを特徴とす
る溶融金属の容器間移し替え監視方法である。According to the present invention, when a molten metal is transferred from an upper container to a lower container, a molten metal flux that freely falls from the upper container is viewed from two directions with a predetermined field of view using each imager. A range is imaged, the position and shape of the molten metal flux are measured from the imaged signal using image processing, and the measurement result and the total volume of the set flux of the molten metal are compared and calculated. This is a method of monitoring the transfer between containers.
【０００８】また、本発明の好ましい使用態様では、上
記溶融金属の位置，形状の測定結果と溶融金属の設定流
束の全容との比較演算結果にもとづいて上記上位容器，
下位容器の少なくとも一つを駆動制御する。Further, in a preferred mode of use of the present invention, the above-mentioned upper container, based on the result of comparison calculation between the measurement result of the position and shape of the molten metal and the total volume of the set flux of the molten metal,
Drive and control at least one of the sub-containers.
【０００９】[0009]
【作用】本発明は、上位容器から自由落下する溶融金属
流束を、例えば、溶融金属流束の正面と側面あるいは溶
融金属流束の上面と側面という二方面から各撮像機を用
いて計測し、該計測結果と溶融金属の設定流束の全容と
比較演算して監視するので、溶融金属の流出開始から流
出終了までの間の溶融金属流束の上位容器の前後方向や
左右方向などへの流れをリアルタイムに監視できる。According to the present invention, the molten metal flux that freely falls from the upper container is measured by using each imager from two sides, that is, the front and side surfaces of the molten metal flux or the upper and side surfaces of the molten metal flux. Since the measurement result and the total flow of the set flux of the molten metal are compared and calculated and monitored, the upper and lower directions of the upper container of the molten metal flux from the start of the outflow of the molten metal to the end of the outflow are The flow can be monitored in real time.
【００１０】また、上記溶融金属流束の位置，形状の計
測結果と溶融金属の設定流束の全容との比較演算結果に
もとづいて上記上位容器，下位容器の少なくとも一つを
駆動制御するので、溶融金属の流出中止とか容器からの
流出量制御とかにより金属流の位置が変わっても、これ
に対応して容器位置が自動調節され、上位容器，下位容
器間の溶融金属の移し替えが格別なトラブルなく実現
し、溶融金属の移し替えの省力化，自動化を図ることが
できる。Further, at least one of the upper vessel and the lower vessel is driven and controlled based on the result of the comparison calculation between the measurement result of the position and shape of the molten metal flux and the total volume of the set flux of molten metal. Even if the position of the metal flow changes due to the stoppage of molten metal outflow or the control of the outflow amount from the container, the container position is automatically adjusted in response to this, and the transfer of molten metal between the upper container and the lower container is special. It can be realized without trouble, and labor saving and automation of molten metal transfer can be achieved.
【００１１】[0011]
【実施例】以下、図面を参照して本発明の実施例を詳細
に説明する。図１は本発明に従って上位容器１から下位
容器２への溶融金属の移し替えを監視し、しかも、溶融
金属流束の位置検出に基づいて、溶融金属流束の実質上
すべてを漏れなく下位容器２に受けるように上位容器１
の傾斜角および下位容器２の位置を制御する制御装置の
概要を示す。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 monitors the transfer of molten metal from the upper vessel 1 to the lower vessel 2 in accordance with the present invention, yet based on the position detection of the molten metal flux, substantially all of the molten metal flux is leaked to the lower vessel. Upper container 1 to receive 2
2 shows an outline of a control device that controls the inclination angle and the position of the lower container 2.
【００１２】図１において、上位容器１を傾斜駆動する
と該容器１中の溶融金属は流出し、下位容器２に収容さ
れる。この溶融金属流束３の全容を、この実施例では、
溶融金属流束３の正面と側面に配置した撮像器４ａ，４
ｂが、二方面（流束の正面と側面）から撮像する。正面
に配置した撮像器４ａは、高さ方向は上位容器１の溶融
金属の流出部から下位容器２の流入部まで、幅方向は溶
融金属の自由落下流束が何らかの形で分散して広がる可
能性がある範囲まで撮影する。なお、必ずしも真正面で
ある必要はない。また、側面に配置した撮像器４ｂは、
上記同様の範囲に加えて上位容器１の傾動側容器下端部
が視野範囲に入るように配置されている。傾動側容器下
端部の溶融金属の垂れを正確に把握するために、若干正
面よりの側面に配置されている。In FIG. 1, when the upper container 1 is tilted, the molten metal in the container 1 flows out and is contained in the lower container 2. In this embodiment, the total volume of the molten metal flux 3 is
Imagers 4a, 4 arranged on the front and side of the molten metal flux 3
b images from two directions (front and side of the flux). The imager 4a arranged on the front side can spread in the height direction from the molten metal outflow portion of the upper container 1 to the inflow portion of the lower container 2 and in the width direction the free-falling flux of the molten metal can be dispersed in some form. Take a picture up to the range where there is nature. It is not always necessary to be directly in front. Further, the image pickup device 4b arranged on the side surface is
In addition to the above range, the lower end of the tilting side container of the upper container 1 is arranged so as to be within the visual field range. In order to accurately grasp the dripping of the molten metal at the lower end of the tilting side container, it is arranged slightly on the side surface from the front.
【００１３】上記溶融金属流束３を二方面から撮像する
においては、上述の態様の他に、図示していないが、例
えば上記上位容器１を傾動することで流出する溶融金属
流束の上方と側面にそれぞれ撮像器を配置するなど、各
種の態様を採用しうる。In imaging the molten metal flux 3 from two directions, although not shown, in addition to the above-mentioned aspect, for example, above the molten metal flux which flows out by tilting the upper vessel 1. Various modes can be adopted, such as disposing an image pickup device on each side surface.
【００１４】また、上記溶融金属流束３を撮像する撮像
器４ａ，４ｂ以外に、該撮像器４ａ，４ｂで捕捉されて
いない他の視野範囲を撮像する別の撮像器（図示せず）
を設けることもできる。具体的には、下位容器２外に逸
流した溶融金属の異常の状態を撮像・監視できる視野範
囲を一つあるいはそれ以上の撮像器で撮像し、上記上位
容器１から下位容器２への溶融金属３の移し替えの監視
・応答制御した後の、上記撮像器４ａ，４ｂで捕捉して
いない逸流した溶融金属の異常状態を監視，確認するこ
とができる。Further, in addition to the image pickup devices 4a and 4b for picking up the molten metal flux 3, another image pickup device (not shown) for picking up a visual field range not captured by the image pickup devices 4a and 4b.
Can be provided. Specifically, one or more image capturing devices are used to image and monitor the abnormal state of the molten metal that has flown out of the lower container 2, and the melting from the upper container 1 to the lower container 2 is performed. After monitoring and response control of the transfer of the metal 3, it is possible to monitor and confirm the abnormal state of the released molten metal which is not captured by the image pickup devices 4a and 4b.
【００１５】図１に示す撮像器４ａ，４ｂの映像信号は
画像処理装置５に入力され、画像処理装置５が、映像信
号の画像処理により撮影画面上の溶融金属流束を把握す
る。具体的には、できるだけ短い周期で連続してサンプ
リングを行うために、溶融金属流束３が流れる方向と実
質上直交する複数のサンプリングラインを撮影画面上に
設け、そのライン上に並ぶ画素データのみを取り込み、
溶融金属流束解析の対象とする。The image signals of the image pickup devices 4a and 4b shown in FIG. 1 are input to the image processing device 5, and the image processing device 5 grasps the molten metal flux on the photographing screen by image processing of the image signal. Specifically, in order to perform continuous sampling at the shortest possible period, a plurality of sampling lines that are substantially orthogonal to the flowing direction of the molten metal flux 3 are provided on the photographing screen, and only the pixel data lined up on the lines are provided. Take in,
It is the target of molten metal flux analysis.
【００１６】図２に、撮像器４ａ，４ｂの映像信号によ
って表わされる画面とその上に設定したサンプリングラ
イン、ならびに１つのサンプリングライン上の映像信号
を示す。画像処理装置５は、溶融金属流束３の正面に配
置した撮像器４ａで撮像された画面６には、平行にサン
プリングラインＹ１ａ〜Ｙ５ａを定めてこれらのライン
上の映像信号を取り込んで、その輝度レベルから各ライ
ン上の溶融金属流束３の位置および幅（広がり）を算出
する。尚、上記サンプリングラインの本数および分布は
上位容器１と下位容器２との落差に応じて設定される。FIG. 2 shows a screen represented by video signals of the image pickup devices 4a and 4b, a sampling line set on the screen, and a video signal on one sampling line. The image processing device 5 defines sampling lines Y1a to Y5a in parallel on the screen 6 imaged by the image pickup device 4a arranged in front of the molten metal flux 3 and takes in video signals on these lines, The position and width (spread) of the molten metal flux 3 on each line are calculated from the brightness level. The number and distribution of the sampling lines are set according to the difference between the upper container 1 and the lower container 2.
【００１７】同様に、溶融金属流束３の側面に配置した
撮像器４ｂで撮像された画面にも平行にサンプリングラ
インＹ１ｂ〜Ｙ５ｂを定めて、これらのライン上の映像
信号を取り込んで、その輝度レベルから各ライン上の溶
融金属流束３の位置および幅（厚み）を算出する。画像
処理装置５は、撮像器４ａの映像信号に基づいて算出し
た位置および広がりと、撮像器４ｂの映像信号に基づい
て算出した位置および厚みより、３次元空間における溶
融金属流束３の位置および形状を算出し、これらを表わ
すデ−タ（数値）と形態（溶融金属流束像）をモニタ−
６に表示し、デ−タ（数値）を統括演算処理装置７に与
える。なお、溶融金属流束３の形状からその断面が近似
計算できるので、単位時間当たりの量を概算することも
できる。統括演算処理装置７は、溶融金属流束３の位置
および形状を表わすデ−タに基づいて、撮像器４ａ，４
ｂの配置位置と視野より求まる下位容器２の上開口領域
に対する溶融金属流束３の位置（開口通過位置）を算出
して、容器２の上開口領域内の適正範囲Ａ内を通過して
いるかを判定する。図３および図４に示すように、溶融
金属流束３が分流したり、垂れている場合は、統括演算
処理装置７は溶融金属が適正位置を流下していないと判
定し、警報出力装置８から警報を発生する。この警報に
もとづいて、操作者は後述する統括演算処理装置７の実
施する自動制御に介して手動操作を付加することもでき
る。また統括演算処理装置７は、溶融金属流束３の流れ
位置，形状から例えば溶融金属流束３が分流したり、分
散したり、垂れている場合は、異常判定すると共に直ち
に上位容器１の傾動角制御装置９に駆動信号を出力し、
傾動角センサー１０からの傾動角を見ながら該容器１を
起こし、流出を中断する操作を指示する。Similarly, sampling lines Y1b to Y5b are defined in parallel also on the screen imaged by the image pickup device 4b arranged on the side surface of the molten metal flux 3, and the video signals on these lines are taken in and the brightness thereof is taken. The position and width (thickness) of the molten metal flux 3 on each line are calculated from the level. The image processing device 5 determines the position and the spread of the molten metal flux 3 in the three-dimensional space from the position and the spread calculated based on the video signal of the image pickup device 4a and the position and the thickness calculated based on the video signal of the image pickup device 4b. Calculate the shape and monitor the data (numerical value) and the morphology (molten metal flux image) that represent them.
6, and the data (numerical value) is given to the central processing unit 7. Since the cross-section can be approximately calculated from the shape of the molten metal flux 3, the amount per unit time can also be roughly calculated. The central processing unit 7 is based on data representing the position and shape of the molten metal flux 3 and image pickup devices 4a and 4a.
Is the position of the molten metal flux 3 with respect to the upper opening region of the lower container 2 (opening passage position) obtained from the arrangement position of b and the visual field calculated (aperture passage position), and whether the molten metal flux 3 has passed within the proper range A in the upper opening region of the container To judge. As shown in FIGS. 3 and 4, when the molten metal flux 3 is diverted or droops, the overall arithmetic processing unit 7 determines that the molten metal is not flowing down the proper position, and the alarm output device 8 Generate an alarm from. Based on this alarm, the operator can also add a manual operation through automatic control performed by the overall arithmetic processing unit 7 described later. Further, when the molten metal flux 3 is diverted, dispersed, or drips from the flow position and shape of the molten metal flux 3, the central processing unit 7 determines an abnormality and immediately tilts the upper container 1. The drive signal is output to the angle control device 9,
While watching the tilt angle from the tilt angle sensor 10, the container 1 is raised to instruct the operation of interrupting the outflow.
【００１８】また、溶融金属流束３の流れ位置が適正位
置の座標からずれていると、統括演算処理装置７は、下
位容器２の台車位置制御装置１１に駆動信号を出力し、
位置センサー１２からの位置を見ながら適正位置範囲に
修正する。また、溶融金属の流出開始後とか流出終了前
の不安定流束の場合は上位容器１の傾動角を調節して流
出量を制御する。When the flow position of the molten metal flux 3 is deviated from the coordinate of the proper position, the overall arithmetic processing unit 7 outputs a drive signal to the carriage position control unit 11 of the lower container 2,
While looking at the position from the position sensor 12, the position is corrected within the proper position range. Further, in the case of an unstable flux after the outflow of molten metal or before the outflow of molten metal, the outflow amount is controlled by adjusting the tilt angle of the upper container 1.
【００１９】[0019]
【発明の効果】本発明によれば、溶融金属の容器間の移
し替え時における溶融金属流束の全容を監視するので、
溶融金属の自由落下流に発生する如何なる状態でも監視
でき、溶融金属の容器間移し替えの自動化を図ることが
できる。According to the present invention, since the total volume of molten metal flux at the time of transferring molten metal between containers is monitored,
Any condition that occurs in the free-falling flow of molten metal can be monitored, and the transfer of molten metal between containers can be automated.
【図１】 本発明を一態様で実施する装置構成の概要を
示すブロック図である。FIG. 1 is a block diagram showing an outline of a device configuration for implementing the present invention in one aspect.
【図２】 図１に示す撮像器４ａ，４ｂの撮影画像と該
画像を表わす１ライン分の映像信号を示す平面図（画像
６）およびグラフ（映像信号の輝度レベル）である。2A and 2B are a plan view (image 6) and a graph (luminance level of a video signal) showing a captured image of the image pickup devices 4a and 4b shown in FIG. 1 and a video signal for one line representing the image.
【図３】 容器流出部の付着物による溶融金属流束の分
流を示す撮影画像と映像信号を示す平面図（画像）およ
びグラフ（映像信号の輝度レベル）である。3A and 3B are a plan view (image) and a graph (brightness level of a video signal) showing a photographed image and a video signal showing a split flow of a molten metal flux due to a deposit on a container outlet.
【図４】 上位容器１の流出部から該容器側面に沿って
流れる垂れ１３を示す平面図である。FIG. 4 is a plan view showing a sag 13 which flows from the outflow portion of the upper container 1 along the side surface of the container.
【符号の説明】 １：上位容器 ２：下位容器 ３：溶融金属流束 ３’：溶融金属
の分流 ４：複数配置する撮像器 ５：画像処理
装置 ６：モニター ７：統括演算
処理装置 ８：警報出力装置 ９：傾動角制
御装置 １０：傾動角センサー １１：台車位
置制御装置 １２：位置センサー １３：溶融金
属の垂れ １４：地金、滓等の付着物 Ａ：適正位
置範囲 Ｙ１ａ〜Ｙ５ａ，Ｙ１ｂ〜Ｙ５ｂ：サンプリングライン[Explanation of Codes] 1: Upper container 2: Lower container 3: Molten metal flux 3 ': Molten metal shunting 4: Multiple imaging devices 5: Image processing device 6: Monitor 7: Integrated processing device 8: Alarm Output device 9: Tilt angle control device 10: Tilt angle sensor 11: Bogie position control device 12: Position sensor 13: Dripping of molten metal 14: Deposits such as metal and slag A: Proper position range Y1a to Y5a, Y1b to Y5b: Sampling line
Claims (2)
える際に、上位容器から自由落下する溶融金属流束を二
方面から各撮像機を用いて所定視野範囲を撮像し、該撮
像信号から溶融金属流束の位置，形状を画像処理を用い
て計測し、該計測結果と溶融金属の設定流束の全容と比
較演算することを特徴とする溶融金属の容器間移し替え
監視方法。1. When the molten metal is transferred from the upper container to the lower container, the molten metal flux that freely falls from the upper container is imaged in a predetermined visual field range from each of the two sides by using each image pickup device, and from the image pickup signal, A method for monitoring the transfer of molten metal between containers, wherein the position and shape of the molten metal flux are measured using image processing, and the measurement result is compared with the total volume of the set flux of molten metal.
融金属の設定流束の全容との比較演算結果にもとづいて
上記上位容器，下位容器の少なくとも一つを駆動制御す
ることを特徴とする請求項１記載の溶融金属の容器間移
し替え監視方法。2. The driving control of at least one of the upper container and the lower container based on a comparison calculation result of the measurement result of the position and shape of the molten metal and the total volume of the set flux of the molten metal. The method for monitoring transfer of molten metal between containers according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31905792A JPH06159951A (en) | 1992-11-27 | 1992-11-27 | Monitoring method for transfer of molten metal between containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31905792A JPH06159951A (en) | 1992-11-27 | 1992-11-27 | Monitoring method for transfer of molten metal between containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06159951A true JPH06159951A (en) | 1994-06-07 |
Family
ID=18106023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31905792A Withdrawn JPH06159951A (en) | 1992-11-27 | 1992-11-27 | Monitoring method for transfer of molten metal between containers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06159951A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005147592A (en) * | 2003-11-18 | 2005-06-09 | Ebara Corp | Molten matter discharge method for waste melting furnace, molten matter discharge device and waste melting treatment facility |
| CN105420652A (en) * | 2015-12-01 | 2016-03-23 | 江苏大力神科技股份有限公司 | Zinc melt transfer device |
-
1992
- 1992-11-27 JP JP31905792A patent/JPH06159951A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005147592A (en) * | 2003-11-18 | 2005-06-09 | Ebara Corp | Molten matter discharge method for waste melting furnace, molten matter discharge device and waste melting treatment facility |
| CN105420652A (en) * | 2015-12-01 | 2016-03-23 | 江苏大力神科技股份有限公司 | Zinc melt transfer device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000201 |