JPH0972852A - Detection method for crack of lining refractory in molten-metal receiver container and repair method for crack - Google Patents
Detection method for crack of lining refractory in molten-metal receiver container and repair method for crackInfo
- Publication number
- JPH0972852A JPH0972852A JP22674895A JP22674895A JPH0972852A JP H0972852 A JPH0972852 A JP H0972852A JP 22674895 A JP22674895 A JP 22674895A JP 22674895 A JP22674895 A JP 22674895A JP H0972852 A JPH0972852 A JP H0972852A
- Authority
- JP
- Japan
- Prior art keywords
- crack
- refractory
- lining
- cracks
- temperature
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 230000008439 repair process Effects 0.000 title claims description 32
- 239000002184 metal Substances 0.000 title claims description 22
- 229910052751 metal Inorganic materials 0.000 title claims description 22
- 238000005507 spraying Methods 0.000 claims description 23
- 239000011819 refractory material Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 238000005336 cracking Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 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
- 238000001931 thermography Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging 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
- 230000000630 rising effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、溶融金属受湯容器
の内張り耐火物の亀裂検出方法並びに亀裂の補修方法に
関し、特に、溶融金属である溶銑、溶鋼を収容する容器
の内張り耐火物の亀裂を検出して、この亀裂の箇所を赤
外線カメラで検出すると共に耐火物を吹き付けて補修す
るための新規な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting cracks in a refractory lining for a molten metal receiving container and a method for repairing the cracks, and more particularly to cracks in a refractory lining for a container containing molten metal or molten steel. The present invention relates to a new improvement for detecting a crack by an infrared camera and spraying a refractory to repair the crack.
【０００２】[0002]
【従来の技術】一般に、取鍋やタンディッシュ等は溶
銑、溶鋼をを受ける容器として広く用いられている。こ
の種の容器は外殻鉄皮の内側に耐火物が構築され、鉄皮
が溶鋼等と直接に接触することを防いでいる。また、こ
の内張り耐火物は溶融した金属と直接接触による溶損
や、注入排出による急激な温度変化によって亀裂が発生
し、発生した亀裂をそのままにして置くと溶融金属によ
って侵食され拡大して、ひいては溶融金属が直接に外殻
鉄皮に接触して、鉄皮の赤熱や金属の漏れへと繋がる恐
れがある。そのために、内張り耐火物に発生した亀裂は
常に、目視又はＣＣＤカメラによりその大きさや深さを
監視し補修又は内張り耐火物の取り替えを行っている。
この内張り耐火物の亀裂の判定は、一般に作業員の目視
の場合が殆んどで、外殻鉄皮を外側から赤外線カメラで
撮影して耐火物の損耗状況を検出する方法も特開平３−
１６９４７４号公報に開示されている。2. Description of the Related Art Generally, ladle, tundish and the like are widely used as containers for receiving hot metal and molten steel. In this type of container, a refractory is constructed inside the outer shell to prevent the steel shell from coming into direct contact with molten steel or the like. In addition, this lining refractory has cracks due to melting loss due to direct contact with the molten metal and rapid temperature change due to pouring and discharging, and if the generated crack is left as it is, it is eroded and expanded by the molten metal, and eventually, Molten metal may come into direct contact with the outer shell, leading to red heat of the shell and leakage of metal. For this reason, cracks generated in the lining refractory are constantly repaired or the lining refractory is replaced by visually observing the size or depth of the crack with a CCD camera.
This cracking of the refractory lining is generally judged by the visual inspection of a worker, and a method of detecting the wear state of the refractory by photographing the outer shell with an infrared camera from the outside is also disclosed.
It is disclosed in Japanese Patent No. 169474.
【０００３】[0003]
【発明が解決しようとする課題】従来の方法は、以上の
ように構成されていたため、次のような課題が存在して
いた。すなわち、目視による亀裂の判定では、亀裂の大
きさや深さを判別し、その亀裂の程度によって補修を促
すのには熟練を要し、漏れ等の危険を回避するため、安
全度を必要以上にとり内張り耐火物の吹き付け補修を行
っているので無駄な補修をして耐火物の原単位が上昇し
ているのが現状であった。また亀裂の発生は現状では至
近距離から作業員が目視で行うため、作業員は高熱の容
器に接近して見なければならず、高熱作業を強いられ極
めて危険であった。更に、前述した先願の方法は外殻鉄
皮からの表面温度の温度分布の測定であるので内張り耐
火物の損耗量は把握出来るが容器のどの箇所に亀裂があ
りその深さの検出まではなされていなかった。すなわ
ち、従来よりタンディッシュの内壁面には溶融金属を受
湯した際に、鉄皮を保護し溶融金属の漏鋼を防止する
為、内張り耐火物が施工されている。この内張り耐火物
は多数回使用の過程において、急激な温度変化や物理的
な衝撃を受けることにより、様々な形状の亀裂を生じ
る。そのため、このような亀裂をそのまま放置した状態
で、タンディッシュ溶融金属を受湯すると亀裂は拡大
し、最悪の場合亀裂が内張り耐火物を貫通し、溶融金属
が直接鉄皮に到達して、鉄皮を溶かし漏鋼にいたる。そ
こでこのような亀裂に対しては、例えばＭｇＯからなる
粉体状の耐火物を吹き付けることによって、亀裂部を充
填する補修を行い、亀裂の拡大及び漏鋼を防止してい
る。このような補修において、以前はその亀裂を目視に
よって発見し、亀裂の深さや幅に合わせた補修を、吹き
付け作業者が判断して行っていた為、的確な補修を行う
には熟練を要する作業であり、さらに過剰な充填補修と
なり、耐火材料の使用量が増え、経済的な効率も低下し
ていた。また、ＣＣＤカメラで観察する方法の場合も、
亀裂の位置や幅は観察できても深さが判別できないた
め、安全度を必要以上に取り内張り耐火物の吹き付け補
修を行うことになり、無駄な補修が増えて耐火物のラン
ニングコストを上昇させることになっていた。Since the conventional method is configured as described above, the following problems exist. That is, in the visual judgment of cracks, it is necessary to determine the size and depth of the cracks, to promote repair depending on the degree of the cracks, and to avoid the risk of leaks, etc. Since the lining refractory is being repaired by spraying, it was the current situation that the basic unit of refractory was rising due to unnecessary repairs. In addition, since the cracks are currently visually observed by a worker from a very short distance, the worker has to look close to a high-heat container, which is extremely dangerous because he is forced to perform high-heat work. Further, since the method of the above-mentioned prior application is the measurement of the temperature distribution of the surface temperature from the outer shell, the wear amount of the lining refractory can be grasped, but it is possible to detect the crack in any part of the container and to detect its depth. It wasn't done. That is, a refractory lining has been conventionally installed on the inner wall surface of a tundish in order to protect the steel shell and prevent steel leakage of the molten metal when receiving the molten metal. This refractory lining gives rise to cracks of various shapes due to sudden temperature changes and physical impacts in the process of being used many times. Therefore, when such a crack is left as it is, when the tundish molten metal is received, the crack expands, and in the worst case, the crack penetrates the lining refractory, the molten metal reaches the iron shell directly, and the iron Melts the skin and leads to leaking steel. Therefore, for such cracks, a powdery refractory made of MgO, for example, is sprayed to repair the cracks to prevent the cracks from expanding and steel leakage. In such repairs, before, the cracks were found visually and repairs were made by the spraying operator to make repairs according to the depth and width of the cracks, so work that requires skill to perform accurate repairs. In addition, excessive filling and repair were performed, the amount of refractory material used increased, and the economic efficiency also decreased. Also, in the case of the method of observing with a CCD camera,
The position and width of the crack can be observed, but the depth cannot be determined.Therefore, the safety level is increased more than necessary and the lining refractory is sprayed and repaired, which increases the wasteful repair and increases the running cost of the refractory. It was supposed to.
【０００４】本発明は、以上のような課題を解決するた
めになされたもので、特に、内張り耐火物に発生する亀
裂を赤外線カメラにて撮影、画像処理装置により判定
し、さらに判定した亀裂部に吹き付ける耐火物の吹き付
け量を最適に制御する。また亀裂位置信号をロボットア
ーム等の亀裂補修機械に伝送し、吹き付け補修材及び吹
き付け補修機械を同時に制御することによりタンディッ
シュ内面の亀裂補修を自動で行う事が可能となる溶融金
属受湯容器の内張り耐火物の亀裂検出方法並びに亀裂の
補修方法を提供することを目的とする。The present invention has been made to solve the above problems, and in particular, cracks generated in a refractory lining are photographed by an infrared camera, judged by an image processing device, and further judged by the crack portion. Optimum control of the amount of refractory sprayed on. In addition, by transmitting the crack position signal to a crack repair machine such as a robot arm and controlling the spray repair material and spray repair machine at the same time, it is possible to automatically repair the cracks on the inner surface of the tundish. An object of the present invention is to provide a crack detection method for a refractory lining and a crack repair method.
【０００５】[0005]
【課題を解決するための手段】本発明による溶融金属受
湯容器の内張り耐火物の亀裂検出方法は、赤外線カメラ
にて内張り耐火物の表面温度を検出し、前記表面温度を
検出した検出信号を画像処理用のモニターに取り込んで
画像として表示し、前記画像の輝度から前記内張り耐火
物の亀裂を検出する方法である。A method for detecting cracks in a refractory lining for a molten metal hot water container according to the present invention detects the surface temperature of the refractory lining in an infrared camera, and outputs a detection signal obtained by detecting the surface temperature. It is a method of capturing a monitor for image processing, displaying it as an image, and detecting cracks in the refractory lining from the brightness of the image.
【０００６】さらに詳細には、前記赤外線カメラにて内
張り耐火物の表面温度を検出する温度が３５０℃以上で
ある方法である。More specifically, it is a method in which the temperature at which the surface temperature of the refractory lining material is detected by the infrared camera is 350 ° C. or higher.
【０００７】さらに詳細には、前記画像の輝度を複数段
階の区分とし、前記区分から前記亀裂の深さと拡がりを
特定する亀裂検出情報を得る方法である。More specifically, the brightness of the image is divided into a plurality of stages, and crack detection information for specifying the depth and spread of the crack is obtained from the division.
【０００８】本発明による溶融金属受湯容器の内張り耐
火物の亀裂の補修方法は、前記亀裂検出情報に基づいて
前記内張り耐火物の補修を行うための耐火物吹き付け用
吹き付け機を制御する方法である。A method of repairing cracks in a refractory lining of a molten metal receiving container according to the present invention is a method of controlling a sprayer for spraying a refractory for repairing the refractory lining based on the crack detection information. is there.
【０００９】さらに詳細には、前記耐火物吹き付け用吹
き付け機の制御は耐火物の吹き付け厚みと拡がりについ
て行われる方法である。従って、赤外線カメラにより耐
熱容器内張り耐火物の表面亀裂を撮影し、画像処理装置
に取り込み２値化することにより亀裂部を判定する。ま
た亀裂部においても深い亀裂と浅い亀裂も段階的に２値
化することにより、亀裂の深さと拡がりの程度を判定す
ることができる。さらに、この得られた亀裂検出情報に
基づいて、亀裂をその深さの程度により耐火物吹き付け
用吹き付け機によって補修量を変えて補修する。また、
内張り耐火物の正常な表面は外気にふれると急激に温度
が低下して行き、亀裂部は内張り耐火物内面に蓄積され
ている熱エネルギーが、亀裂部を伝わって外部に放出し
ているため、赤外線カメラにて温度を検出した場合、正
常部よりも亀裂部は温度が高いと判定される。また各亀
裂においても、その深さや形状により亀裂部及びその付
近の温度分布は異なるため、その温度分布をモニターに
より赤外線カラーサーモグラフィによる温度分布画像と
したとき、それらの亀裂が画面上でどの程度の深さであ
るかを判別する。この際には、あらかじめ作成した内張
り耐火物の表面温度と深さ別の亀裂の温度との差の関係
基準指標（すなわち、少なくとも亀裂の深さ（拡がりを
入れることも可）を示す亀裂検出情報である）を用い
る。図４は溶鋼注入終了後２０分経過したタンディッシ
ュの側壁表面温度の温度分布を、正常部の温度を基準温
度とし、基準温度と各亀裂部の温度差とそれに対応する
亀裂部の深さの関係基準指標の一実施例を示す図であ
る。この関係基準指標はタンディッシュにおいて溶鋼を
全て抽出した２０分後に亀裂の発生している内張り耐火
物の表面温度を赤外線カメラにて検出し、その後内張り
耐火物に発生している亀裂の深さを実測して、内張り耐
火物の表面温度と各深さ別の亀裂の温度差の関係を求め
て得たものである。両者の間には相関関係がある。さら
にこの場合内張り耐火物の材質やライニング厚みにより
それに対応した関係基準指標も作成する。本発明はタン
ディッシュ内の内張り耐火物を赤外線カメラで撮影し、
画像処理装置に取り込み２値化し亀裂部面積を求める。
また亀裂深さは、前記した関係基準指標により求められ
るので、この結果を演算処理し亀裂部体積を求める。補
修材の密度はあらかじめ分かっているので、補修材の最
適な吹き付け量を演算により決定し、耐火物吹き付け用
吹き付け機にて熱間吹き付け補修を行うことができる。More specifically, the spraying machine for spraying the refractory material is controlled by the spraying thickness and the spread of the refractory material. Therefore, a surface crack of the refractory lining the heat-resistant container is photographed by the infrared camera, and the crack is judged by taking it into the image processing device and binarizing it. Further, deep cracks and shallow cracks are also binarized stepwise in the crack portion, so that the depth and extent of the crack can be determined. Further, based on the obtained crack detection information, the crack is repaired by changing the repair amount by the sprayer for spraying the refractory material according to the degree of the depth. Also,
The normal surface of the refractory lining suddenly drops in temperature when exposed to the outside air, and the crack portion has thermal energy accumulated on the inner surface of the refractory lining, which is released to the outside through the crack portion. When the temperature is detected by the infrared camera, it is determined that the crack portion has a higher temperature than the normal portion. Also, in each crack, the temperature distribution in the crack and its vicinity differs depending on the depth and shape, so when the temperature distribution is taken as a temperature distribution image by infrared color thermography on a monitor, how much of those cracks on the screen is displayed. Determine if it is depth. In this case, crack detection information indicating the relational reference index of the difference between the surface temperature of the refractory lining that was created in advance and the crack temperature by depth (that is, at least the depth of the crack (it is also possible to include the spread)). Is used. FIG. 4 shows the temperature distribution of the sidewall surface temperature of the tundish 20 minutes after the completion of the molten steel injection, with the temperature of the normal portion as the reference temperature and the temperature difference between the reference temperature and each crack portion and the depth of the corresponding crack portion. It is a figure which shows one Example of a relationship reference | standard index. This relational criterion is an infrared camera that detects the surface temperature of cracked lining refractories 20 minutes after extracting all the molten steel in the tundish, and then the depth of cracks generated in the lining refractory is measured. This is obtained by actually measuring and determining the relationship between the surface temperature of the refractory lining and the temperature difference of cracks at each depth. There is a correlation between the two. Further, in this case, the reference index corresponding to the material and the lining thickness of the refractory lining is also created. The present invention images the refractory lining in the tundish with an infrared camera,
It is taken into an image processing device and binarized to obtain the crack area.
Further, since the crack depth is obtained by the above-mentioned relational reference index, this result is arithmetically processed to obtain the crack portion volume. Since the density of the repair material is known in advance, the optimum spray amount of the repair material can be determined by calculation, and hot spray repair can be performed by a sprayer for spraying the refractory material.
【００１０】[0010]
【発明の実施の形態】以下、本発明による溶融金属受湯
容器の内張り耐火物の亀裂検出方法並びに亀裂の補修方
法の実施の形態を図面に基づいて説明する。図１は本発
明を構成する装置であって、タンディッシュからなる内
張り耐火物１の内壁面を赤外線カメラ２で撮影して設定
器内蔵型の画像処理用のモニター３で内張り耐火物１の
損耗や亀裂を目視で測定する構成である。すなわち、駆
動台車５上には赤外線カメラ２と亀裂補修用ランス６及
び耐火物吹き付け用吹き付け機６Ａを有する保持体８が
設けられ、赤外線カメラ２の検出信号２ａが亀裂補修制
御装置４を介して前記画像処理用のモニター３に入力さ
れる構成である。赤外線カメラ２を内張り耐火物１の内
壁面１ａと１ｂ及び１ｃを撮影できる位置に配置して撮
影して内張り耐火物１の表面温度を検出し、この表面温
度を検出した検出信号を画像処理用のモニター３に取り
込んで画像として表示し、この画像の輝度から内張り耐
火物１の亀裂を検出するために内壁面１ａ〜１ｃの温度
分布を前記画像処理用のモニター３に入力する。撮影す
る際には、赤外線カメラの位置を移動せずに内張り耐火
物１自体が回転と傾動とによって内張り耐火物の内壁面
１ａ，１ｂ，１ｃを撮影することができる。なお、長辺
部の内壁面１ａ，１ｃと底部の内壁面１ｂを３回にわけ
て測定する。内壁面１ｂは損耗が少なく補修はあまり必
要ない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a crack detecting method and a crack repairing method for a refractory lining of a molten metal receiving container according to the present invention will be described below with reference to the drawings. FIG. 1 shows an apparatus constituting the present invention, in which the inner wall surface of a refractory 1 made of tundish is photographed by an infrared camera 2 and a monitor 3 for image processing having a built-in setting device wears the refractory 1 on the inside. This is a configuration in which cracks and cracks are visually measured. That is, a holding body 8 having an infrared camera 2, a crack repair lance 6 and a spraying machine 6A for spraying refractory is provided on the drive carriage 5, and a detection signal 2a of the infrared camera 2 is transmitted via the crack repair control device 4. The configuration is input to the monitor 3 for image processing. The infrared camera 2 is arranged at a position where the inner wall surfaces 1a, 1b and 1c of the lining refractory 1 can be photographed, the surface temperature of the lining refractory 1 is detected, and the detection signal that detects the surface temperature is used for image processing. The temperature distribution of the inner wall surfaces 1a to 1c is input to the monitor 3 for image processing in order to detect the crack of the lining refractory 1 from the brightness of this image. When photographing, the inner wall surfaces 1a, 1b, 1c of the inner refractory material can be photographed by rotating and tilting the inner refractory material 1 without moving the position of the infrared camera. The inner wall surfaces 1a and 1c of the long side and the inner wall surface 1b of the bottom are divided into three times for measurement. The inner wall surface 1b has little wear and does not require much repair.
【００１１】図３は溶融金属である溶鋼を全て注入し終
えてから２０分経過したタンディッシュの内壁面１ａの
部位を赤外線カメラ２にて撮影してポイントＡの部位を
温度４３０℃を基準温度として設定し画像処理用のモニ
ター３に表示した内張り耐火物１の温度分布を示す模式
図である。このポイントＡよりも温度が６℃〜１５℃高
い温度域Ａ１と１６℃以上高い温度域Ａ２およびポイン
トＡよりも５℃以上低い温度域Ａ３にそれぞれ色別して
モニター３に表示した。モニター３に表示された内張り
耐火物１の温度分布に基づき亀裂箇所を判定すると、ポ
イントＡより６℃〜１５℃と１６℃以上高温で表示され
た箇所が亀裂の発生した箇所であった。さらに亀裂の深
さは１６℃以上の温度差の位置よりも６℃以上の温度差
の位置の亀裂の方が亀裂は深くなっており、その亀裂の
深さの平均値は温度域Ａ１で２５ｍｍ、温度域Ａ２で１
５ｍｍであった。そこでこの亀裂の深さに対応した亀裂
の吹き付け補修を行なった。なお、この場合、画像の輝
度のレベルを３段階（図３では４段階の区分）に区分し
て温度域差とし、亀裂の深さを特定する亀裂検出情報と
したが、この区分は３段階に限ることなく任意の複数段
階とすることができ、亀裂の拡がりにも応用できる。In FIG. 3, the portion of the inner wall surface 1a of the tundish 20 minutes after the completion of the injection of all the molten steel, which is the molten metal, is photographed by the infrared camera 2 and the portion of the point A has a reference temperature of 430 ° C. FIG. 4 is a schematic diagram showing the temperature distribution of the refractory lining 1 set as the above and displayed on the monitor 3 for image processing. The temperature range A1 in which the temperature is 6 ° C. to 15 ° C. higher than the point A, the temperature range A2 higher than 16 ° C. or higher and the temperature range A3 lower than the point A by 5 ° C. or higher are color-coded and displayed on the monitor 3. When the crack location was judged based on the temperature distribution of the refractory lining 1 displayed on the monitor 3, the location displayed at a high temperature of 6 ° C. to 15 ° C. and 16 ° C. or higher from the point A was the location where the crack occurred. Further, the depth of the crack is deeper at the temperature difference of 6 ° C or more than at the temperature difference of 16 ° C or more, and the average value of the depth of the crack is 25 mm in the temperature range A1. , In temperature range A2 1
It was 5 mm. Therefore, the cracks were repaired by spraying corresponding to the depth of the cracks. In this case, the brightness level of the image is divided into three stages (four stages in FIG. 3) to obtain the temperature range difference, and the crack detection information that specifies the depth of the crack is used. The number of stages is not limited to the above, and can be applied to the spread of cracks.
【００１２】この赤外線画像を画像処理装置（図示せ
ず）に取り込み２値化し、各亀裂部の幅と深さから凹部
体積を演算機（図示せず）により算出する。亀裂深さの
定量は前記した亀裂深さ別の温度差の関係基準指標を用
いて行う。吹き付け補修の密度はあらかじめ分かってい
るので、演算機により吹き付けるべき耐火物の量を計算
し、各亀裂毎に耐火物吹き付け用吹き付け機６Ａを用い
て吹き付け量を制御する。なお、亀裂の深さだけではな
く、拡がりにも用いることができる。また、前記画像処
理装置に取り込んだ２値化像より各亀裂部の亀裂域位置
座標を求め、この位置信号を亀裂補修機制御装置４に取
り込み、耐火物吹き付け用吹き付け機６Ａの制御を行
う。また、前述の吹き付け補修材制御及び耐火物吹き付
け用吹き付け機６Ａを連動させることにより、内張り耐
火物１の内面に発生する亀裂の補修が、最適に且つ自動
で可能となる。This infrared image is taken into an image processing device (not shown), binarized, and the volume of the recess is calculated from the width and depth of each crack by a computer (not shown). The crack depth is quantified by using the above-described reference index of the temperature difference for each crack depth. Since the density of the spray repair is known in advance, the amount of refractory to be sprayed is calculated by a computer, and the spray amount is controlled by using the refractory spray gun 6A for each crack. It can be used not only for the depth of cracks but also for the spread. Further, the crack area position coordinates of each crack portion are obtained from the binarized image taken into the image processing apparatus, and this position signal is taken into the crack repair machine control apparatus 4 to control the refractory blowing machine 6A. Further, by interlocking the above-mentioned spray repair material control and the spraying machine 6A for spraying the refractory, it is possible to automatically and optimally and automatically repair the cracks generated on the inner surface of the refractory lining 1.
【００１３】[0013]
【実施例】前述の本発明の方法により、タンディッシュ
に発生する内張り耐火物１の亀裂の補修すなわち、吹き
付け用の耐火物の吹き付け厚みと拡がりが遠隔操作にて
熟練を要せずとも行えるようになり、その作業性が向上
した。また作業者間での吹き付け量のバラツキが減り、
吹き付け材の原単位が従来２６８ｋｇ〜２７５ｋｇ／回
であったのが、２５０ｋｇ／回にまで低減した。また、
表面温度を検出する温度は３５０℃以上で有効であるこ
とが判明した。EXAMPLE By the above-mentioned method of the present invention, repair of cracks of the refractory lining 1 generated in the tundish, that is, spraying thickness and spread of the refractory for spraying can be performed by remote control without requiring skill. And its workability has improved. In addition, the variation in the spraying amount between workers is reduced,
The basic unit of the sprayed material was 268 kg to 275 kg / cycle, but it has been reduced to 250 kg / cycle. Also,
It has been found that the temperature for detecting the surface temperature is effective at 350 ° C. or higher.
【００１４】[0014]
【発明の効果】本発明により、赤外線カメラを用い耐熱
容器内張り耐火物の表面温度を検出し、画像処理用のモ
ニターに赤外線サーモグラフィによる温度分布を画像化
することにより、亀裂部と正常部を識別することがで
き、さらに亀裂部においても深い亀裂と浅い亀裂を、そ
の程度により段階的に色分けして検出することができ
る。また、この赤外線サーモグラフィを用いて内張り耐
火物の亀裂深さ並びに拡がりを識別し、その深さ等に合
った吹き付け量の補修をすることにより、熟練を要せず
とも無駄の少ない亀裂の補修が可能となる。According to the present invention, the surface temperature of the refractory lining the heat-resistant container is detected by using the infrared camera, and the temperature distribution by the infrared thermography is imaged on the monitor for image processing, so that the crack portion and the normal portion can be distinguished. Further, it is possible to detect deep cracks and shallow cracks even in the crack portion by color-coding in stages according to their degree. In addition, by using this infrared thermography to identify the crack depth and spread of the lining refractory, and by repairing the amount of spraying that matches the depth, etc., it is possible to repair cracks with little waste without requiring skill. It will be possible.
【図１】本発明の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
【図２】補修状態を示す説明図である。FIG. 2 is an explanatory diagram showing a repaired state.
【図３】溶融金属注入終了後２０分経過した内張り耐火
物の内壁面の赤外線サーモグラフィによる温度分布の一
実施例を示す図である。FIG. 3 is a diagram showing an example of temperature distribution by infrared thermography of the inner wall surface of the refractory lining 20 minutes after the completion of molten metal injection.
【図４】溶鋼注入終了後２０分経過した内張り耐火物の
側壁表面正常部の温度を基準温度とし、基準温度と各亀
裂部の温度差とそれに対応する亀裂部の深さの関係基準
指標の一実施例を示す図である。[Fig. 4] Fig. 4 is a graph showing the relationship between the reference temperature and the temperature difference between each crack and the depth of the crack corresponding to the reference temperature, which is the temperature of the normal side wall surface of the lining refractory 20 minutes after the completion of molten steel injection. It is a figure which shows one Example.
１ 内張り耐火物 ２ 赤外線カメラ ３ 画像処理用のモニター ４ 亀裂補修制御装置 ５ 駆動台車 ６ 亀裂補修用ランス ６Ａ 耐火物吹き付け用吹き付け機 1 Refractory lining 2 Infrared camera 3 Monitor for image processing 4 Crack repair control device 5 Drive truck 6 Crack repair lance 6A Sprayer for spraying refractory
───────────────────────────────────────────────────── フロントページの続き (72)発明者 菅野 晃由 広島県呉市昭和町11番１号 日新製鋼株式 会社呉製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akiyoshi Sugano 11-1 Showa-cho, Kure City, Hiroshima Prefecture Nisshin Steel Co., Ltd. Kure Steel Works
Claims (5)
表面温度を検出し、前記表面温度を検出した検出信号を
画像処理用のモニター(3)に取り込んで画像として表示
し、前記画像の輝度から前記内張り耐火物(1)の亀裂を
検出することを特徴とする溶融金属受湯容器の内張り耐
火物の亀裂検出方法。1. An infrared camera (2) detects the surface temperature of a refractory lining (1), and the detection signal obtained by detecting the surface temperature is captured by an image processing monitor (3) and displayed as an image. A method for detecting cracks in a refractory lining for a molten metal receiving container, characterized by detecting cracks in the refractory lining (1) from the brightness of the image.
(1)の表面温度を検出する温度が３５０℃以上であるこ
とを特徴とする請求項１記載の溶融金属受湯容器の内張
り耐火物の亀裂検出方法。2. A refractory material lined with the infrared camera (2)
The method for detecting cracks in a refractory lining for a molten metal receiving container according to claim 1, wherein the temperature for detecting the surface temperature of (1) is 350 ° C. or higher.
前記区分から少なくとも前記亀裂の深さを特定する亀裂
検出情報を得ることを特徴とする請求項１記載の溶融金
属受湯容器の内張り耐火物の亀裂検出方法。3. The brightness of the image is divided into a plurality of stages,
The crack detection information for specifying at least the depth of the crack is obtained from the section, and the crack detection method for the refractory lining of the molten metal receiving container according to claim 1.
耐火物の補修を行うための耐火物吹き付け用吹き付け機
(6A)を制御する事を特徴とする溶融金属受湯容器の内張
り耐火物の亀裂の補修方法。4. A spraying machine for spraying a refractory material for repairing the refractory material lined on the basis of the crack detection information.
A method for repairing cracks in a refractory lining on a molten metal receiving container characterized by controlling (6A).
制御は耐火物の吹き付け厚みと拡がりについて行われる
ことを特徴とする請求項４記載の溶融金属受湯容器の内
張り耐火物の亀裂の補修方法。5. The cracking of the refractory lining on the molten metal receiving container according to claim 4, wherein the spraying machine (6A) for spraying the refractory is controlled with respect to the spray thickness and spread of the refractory. Repair method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22674895A JPH0972852A (en) | 1995-09-04 | 1995-09-04 | Detection method for crack of lining refractory in molten-metal receiver container and repair method for crack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22674895A JPH0972852A (en) | 1995-09-04 | 1995-09-04 | Detection method for crack of lining refractory in molten-metal receiver container and repair method for crack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0972852A true JPH0972852A (en) | 1997-03-18 |
Family
ID=16849998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22674895A Withdrawn JPH0972852A (en) | 1995-09-04 | 1995-09-04 | Detection method for crack of lining refractory in molten-metal receiver container and repair method for crack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0972852A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100314850B1 (en) * | 1997-12-24 | 2002-06-20 | 이구택 | Method for measuring and recording thermal image of hot object |
| KR100573562B1 (en) * | 2001-12-24 | 2006-04-25 | 주식회사 포스코 | Edge crack detection device of steel plate using heating device |
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| WO2018141809A1 (en) | 2017-02-01 | 2018-08-09 | Calderys France | Damage detection system and method of use |
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-
1995
- 1995-09-04 JP JP22674895A patent/JPH0972852A/en not_active Withdrawn
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|---|---|---|---|---|
| KR100314850B1 (en) * | 1997-12-24 | 2002-06-20 | 이구택 | Method for measuring and recording thermal image of hot object |
| KR100573562B1 (en) * | 2001-12-24 | 2006-04-25 | 주식회사 포스코 | Edge crack detection device of steel plate using heating device |
| JP2008215685A (en) * | 2007-03-01 | 2008-09-18 | Nippon Steel Corp | Container wall state management method, apparatus, and computer program |
| JP2011245494A (en) * | 2010-05-24 | 2011-12-08 | Kobe Steel Ltd | Method for maintaining ladle for hot metal |
| US8958058B2 (en) | 2011-11-15 | 2015-02-17 | Process Metrix | Apparatus, process, and system for monitoring the integrity of containers |
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| WO2013074464A3 (en) * | 2011-11-15 | 2013-07-18 | Bonin Michel Pierre | Apparatus, process, and system for monitoring the integrity of containers |
| EA027851B1 (en) * | 2011-11-15 | 2017-09-29 | Проусесс Метрикс | Apparatus and process for monitoring the integrity of a container |
| JP2018526601A (en) * | 2015-07-17 | 2018-09-13 | リフラクトリー・インテレクチュアル・プロパティー・ゲーエムベーハー・ウント・コンパニ・カーゲー | Method for repairing refractory linings of metallurgical containers, especially at high temperatures |
| WO2018141809A1 (en) | 2017-02-01 | 2018-08-09 | Calderys France | Damage detection system and method of use |
| EP3575864A1 (en) * | 2018-05-30 | 2019-12-04 | SMS Group GmbH | Method and use of a mobile observation device to operate a furnace |
| EP3575866A1 (en) * | 2018-05-30 | 2019-12-04 | SMS Group GmbH | Mobile observation device for use in a furnace and control device to operate a furnace |
| CN114799145A (en) * | 2022-05-07 | 2022-07-29 | 广东韶钢松山股份有限公司 | Automatic spraying and smearing control method and system for continuous casting tundish refractory |
| CN114799145B (en) * | 2022-05-07 | 2024-10-18 | 广东韶钢松山股份有限公司 | Automatic spraying and smearing control method and system for continuous casting tundish refractory material |
| CN115684272A (en) * | 2023-01-03 | 2023-02-03 | 广州市市政工程试验检测有限公司 | A Crack Detection Method of Steel Structure Based on Infrared Camera |
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