JP2000035288A - Apparatus and method for cooling furnace body - Google Patents
Apparatus and method for cooling furnace bodyInfo
- Publication number
- JP2000035288A JP2000035288A JP10213463A JP21346398A JP2000035288A JP 2000035288 A JP2000035288 A JP 2000035288A JP 10213463 A JP10213463 A JP 10213463A JP 21346398 A JP21346398 A JP 21346398A JP 2000035288 A JP2000035288 A JP 2000035288A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- water
- valve
- temperature
- gas
- 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- Withdrawn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
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄鋼製造プロセス
で用いられる転炉等の溶融金属容器を水冷する炉体冷却
装置及び冷却方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace cooling device and a cooling method for water-cooling a molten metal container such as a converter used in a steel making process.
【０００２】[0002]
【従来の技術】工業窯炉では、内張り耐火物の保護や損
耗抑制のため又は鉄皮使用寿命を延ばすために鉄皮の冷
却が行われる場合がある。冷却方法としては、一般には
空気吹き付け、鉄皮への散水、水冷パイプや水冷パネル
を鉄皮に取り付けるなどが採用されている。そして水冷
の場合には、各種安全対策が図られている。2. Description of the Related Art In an industrial kiln, a steel shell is sometimes cooled in order to protect a refractory lining or suppress abrasion or extend a service life of the steel shell. As a cooling method, generally, air blowing, water spraying on a steel shell, attaching a water-cooling pipe or a water-cooling panel to the steel shell, or the like is adopted. In the case of water cooling, various safety measures are taken.
【０００３】例えば特開平１−２２２００５号公報に
は、高炉炉体冷却設備の破損検知方法・装置として、冷
却盤の炉外排水管にガス補修器を設け、内部に電気導通
検出電極を取り付けて冷却水を満たしておき、冷却盤が
破損した時に炉内ガスがガス補修器に流入して、充満ガ
スによって電気不導通になることで破損を検知すること
が開示されている。[0003] For example, Japanese Patent Application Laid-Open No. 1-222005 discloses a method and a device for detecting damage to a blast furnace furnace body cooling system, in which a gas repair device is provided in a drain pipe outside a furnace of a cooling board, and an electric conduction detection electrode is attached inside. It is disclosed that when the cooling water is filled, the gas in the furnace flows into the gas repair device when the cooling board is broken, and the filling gas causes electrical disconnection to detect the breakage.
【０００４】また特開平５−３９５１７号公報には、炉
体水冷装置として、水冷パネル、水冷パネルからの漏水
を検出する水柱部、不活性ガス置換装置からなり、水冷
パネルが破損し漏水が発生した場合、水柱部の水面低下
を検出して、緊急に水冷パネル内を不活性ガスで置換す
ることが開示されている。Japanese Patent Application Laid-Open No. Hei 5-39517 discloses a water cooling device for a furnace, which comprises a water cooling panel, a water column for detecting water leakage from the water cooling panel, and an inert gas replacement device. In this case, it is disclosed that when the water level of the water column is lowered, the inside of the water cooling panel is urgently replaced with an inert gas.
【０００５】[0005]
【発明が解決しようとする課題】耐火物や鉄皮を保護す
るための冷却としては水冷が最も効果があるが、溶融金
属容器では水と溶融金属の接触による水蒸気爆発の危険
があるため、前記のように安全対策が必要である。Water cooling is the most effective cooling for protecting refractories and steel shells. However, in a molten metal container, there is a danger of steam explosion due to contact between water and molten metal. It is necessary to take safety measures.
【０００６】水冷パイプなどを鉄皮に設置して水冷する
場合、耐火物が損耗消失した時に、溶融金属が急速に鉄
皮を溶融し水と接触する危険が生じるが、炉内ガスの流
入など、又は耐火物温度や鉄皮の温度を監視することに
よってその兆候を察知することは従来からなされてい
る。しかしながら、兆候を察知できて冷却水を止めるこ
とはできても、水冷パイプなどには依然水が滞留してお
り、溶融金属が急速に鉄皮を溶融し水と接触する危険性
は回避できない。これに対し、水冷パネルなどの破損漏
水の検出によって、緊急に水冷パネル内を不活性ガスで
置換する方法がある。しかしながら、漏水後の検出では
緊急性に劣る。耐火物が損耗消失した後、溶融金属が鉄
皮を溶融し水と接触するまでの時間は比較的短いと思わ
れ、操業中であっても短時間の内に冷却系から水を除去
する必要がある。When a water-cooled pipe or the like is installed in a steel shell to perform water cooling, when the refractory wears out and disappears, there is a risk that the molten metal rapidly melts the steel shell and comes into contact with water. Or, by monitoring the temperature of the refractory material or the temperature of the steel shell, it is conventional to detect the sign. However, even if the signs can be detected and the cooling water can be stopped, the water still remains in the water cooling pipe and the like, and the danger that the molten metal rapidly melts the iron shell and comes into contact with the water cannot be avoided. On the other hand, there is a method of urgently replacing the inside of the water-cooled panel with an inert gas by detecting breakage water leakage from the water-cooled panel or the like. However, detection after water leakage is less urgent. It is considered that the time required for the molten metal to melt the iron shell and come into contact with water after the refractory has been worn out is relatively short, and it is necessary to remove water from the cooling system within a short time even during operation. There is.
【０００７】そこで本発明は、水冷される溶融金属容器
において、鉄皮温度を監視しつつ、水と溶融金属の接触
が予想されるほどの鉄皮温度上昇が検出された場合に、
冷却水の供給を自動停止し、かつ速やかに冷却系から水
を除去することができる炉体冷却装置及び冷却方法を提
供することを目的とする。Accordingly, the present invention provides a method for monitoring the temperature of a steel shell in a molten metal container cooled with water, and detecting an increase in the steel shell temperature such that contact between water and the molten metal is expected.
An object of the present invention is to provide a furnace body cooling device and a cooling method capable of automatically stopping supply of cooling water and quickly removing water from a cooling system.
【０００８】[0008]
【課題を解決するための手段】本発明の要旨は以下の
（１）〜（７）の通りである。The gist of the present invention is as follows (1) to (7).
【０００９】（１） 耐火物が内張りされ鉄皮を水冷す
る機構を備えた溶融金属容器において、該鉄皮の外側に
取り付けられた水冷パイプに並列にガス冷却パイプを設
置し、水冷パイプとガス冷却パイプの間が開閉弁を介し
て接続されていることを特徴とする炉体冷却装置。(1) In a molten metal container lined with refractory and provided with a mechanism for water-cooling the steel shell, a gas cooling pipe is installed in parallel with a water-cooling pipe attached outside the steel shell, and the water-cooling pipe and the gas A furnace body cooling device, wherein the cooling pipes are connected via an on-off valve.
【００１０】（２） 前記開閉弁と連動して制御される
冷却水流方向制御弁が水冷パイプの給水口及び排水口に
設けられていることを特徴とする前記（１）の炉体冷却
装置。(2) The furnace body cooling device according to (1), wherein a cooling water flow direction control valve controlled in conjunction with the on-off valve is provided at a water supply port and a drain port of a water cooling pipe.
【００１１】（３） 前記開閉弁又は開閉弁近傍の鉄皮
の外側の少なくとも１箇所に温度センサーを設置し、当
該温度センサーで検知した温度が所定の温度以上になっ
た場合に該開閉弁を開く機構を備えたことを特徴とする
前記（１）又は（２）の炉体冷却装置。(3) A temperature sensor is installed at at least one position outside the steel shell in the vicinity of the on-off valve or on-off valve, and when the temperature detected by the temperature sensor exceeds a predetermined temperature, the on-off valve is activated. The furnace body cooling device according to the above (1) or (2), further comprising an opening mechanism.
【００１２】（４） 温度センサーが光ファイバーであ
ることを特徴とする前記（３）の炉体冷却装置。(4) The furnace body cooling device according to (3), wherein the temperature sensor is an optical fiber.
【００１３】（５） 開閉弁自身が温度検知手段を備
え、所定の温度以上になったときに自動的に開閉弁が開
く機構を備えたことを特徴とする前記（１）〜（４）の
いずれかの炉体冷却装置。(5) The opening / closing valve itself has a temperature detecting means, and a mechanism for automatically opening the opening / closing valve when the temperature of the opening / closing valve reaches a predetermined temperature or higher is provided. Any furnace body cooling device.
【００１４】（６） 水冷パイプ及びガス冷却パイプが
耐火物内に配置されていることを特徴とする前記（１）
〜（５）のいずれかの炉体冷却装置。(6) The water cooling pipe and the gas cooling pipe are arranged in a refractory (1).
A furnace body cooling device according to any one of (1) to (5).
【００１５】（７） 前記（１）〜（６）のいずれかの
炉体冷却装置を用いて、前記開閉弁が設置されている場
所又はその近傍の温度が所定の温度以上になったとき、
前記開閉弁を開いてガスを水冷パイプ内に流し、水冷パ
イプ内の冷却水を冷却ガスにより水冷パイプ内から除去
することを特徴とする炉体冷却方法。(7) When the temperature of the place where the on-off valve is installed or in the vicinity thereof becomes equal to or higher than a predetermined temperature by using the furnace body cooling device of any of the above (1) to (6),
A furnace body cooling method, characterized in that the on-off valve is opened to flow gas into a water cooling pipe, and cooling water in the water cooling pipe is removed from inside the water cooling pipe by a cooling gas.
【００１６】[0016]
【発明の実施の形態】本発明の炉体冷却装置の例を図１
に示す。FIG. 1 shows an example of a furnace body cooling apparatus according to the present invention.
Shown in
【００１７】図１（ａ）に示すように、溶融金属容器
は、耐火物７が内張りされた鉄皮８を冷却するため鉄皮
８の外側に水冷パイプ３が取り付けられ、水冷パイプ３
に並列にガス冷却パイプ２が設置されている。さらに、
図１（ｂ）に鉄皮部を拡大して示すように、水冷パイプ
３とガス冷却パイプ２の間が開閉弁１を介して接続され
ている。開閉弁１は、水冷パイプ３及びガス冷却パイプ
２の全長に渡って適当な間隔、例えば１ｍ間隔で複数設
置される。好ましくは、鉄皮破損の可能性がある範囲に
おいて、鉄皮破損の前兆となる鉄皮の温度変化が検知で
きる範囲内に少なくとも１個設置される。これによって
鉄皮の全ての破損を漏れなく検知して、確実に冷却系か
ら水を除去することが可能となる。As shown in FIG. 1 (a), the molten metal container is provided with a water-cooling pipe 3 outside the steel shell 8 for cooling a steel shell 8 lined with a refractory 7, and
A gas cooling pipe 2 is installed in parallel with the gas cooling pipe 2. further,
As shown in FIG. 1 (b) in an enlarged manner, the steel shell is connected between the water cooling pipe 3 and the gas cooling pipe 2 via an on-off valve 1. A plurality of on-off valves 1 are provided at appropriate intervals, for example, at 1 m intervals over the entire length of the water cooling pipe 3 and the gas cooling pipe 2. Preferably, in a range where there is a possibility of steel breakage, at least one is installed within a range where a temperature change of the steel shell which is a precursor of the steel breakage can be detected. As a result, it is possible to detect all breaks in the steel shell without leakage and to reliably remove water from the cooling system.
【００１８】水冷パイプ３及びガス冷却パイプ２の末端
は、図２に示すように、各々冷却水給排水装置６と冷却
ガス給排気装置５に接続されている。水冷パイプ３の給
水口及び排水口に冷却水流方向制御弁９を設けておけ
ば、緊急排水の必要が発生した場合、同図（ｂ）に示す
ように、冷却水流方向制御弁９によって、開閉弁１と連
動して冷却水の流れを冷却水給排水装置６側から緊急排
水槽４側に切り替えることができる。As shown in FIG. 2, the ends of the water cooling pipe 3 and the gas cooling pipe 2 are connected to a cooling water supply / drainage device 6 and a cooling gas supply / exhaust device 5, respectively. If the cooling water flow direction control valve 9 is provided at the water supply port and the water discharge port of the water cooling pipe 3, when an emergency drainage is required, the cooling water flow direction control valve 9 opens and closes as shown in FIG. The flow of the cooling water can be switched from the cooling water supply / drainage device 6 side to the emergency drainage tank 4 side in conjunction with the valve 1.
【００１９】本発明では、図１（ｂ）に示すように、冷
却している鉄皮８の外側に温度センサー１０を開閉弁１
の位置又はその近傍に少なくとも１箇所設置し、好まし
くは図３に示すように開閉弁間隔より密に複数設置し、
鉄皮の温度を連続して監視することが望ましい。そして
いずれかの温度センサー１０に検知された鉄皮温度が鉄
皮破損の前兆となる変化を示したとき、その温度センサ
ーに最も近い開閉弁が緊急排水を行う。In the present invention, as shown in FIG. 1 (b), a temperature sensor 10
At least at one position or in the vicinity thereof, and preferably, a plurality of them are installed more densely than the opening / closing valve interval as shown in FIG.
It is desirable to continuously monitor the temperature of the skin. Then, when the temperature of the steel shell detected by any one of the temperature sensors 10 indicates a change that indicates that the steel shell is damaged, the on-off valve closest to the temperature sensor performs emergency drainage.
【００２０】図３（ａ）は、耐火物や鉄皮に異常が無
く、鉄皮温度に急激な上昇が無い正常冷却時の、開閉弁
１近傍の冷却水及び冷却ガスの流れを示す。水冷パイプ
３及びガス冷却パイプ２の中は、各々冷却水及び冷却ガ
スで満たされ、開閉弁１が閉ざされて冷却水及び冷却ガ
スは干渉せず、独立に矢印の方向に流れている。冷却水
及び冷却ガスの流れ方向は対向していてもかまわない。
また図２（ａ）は、正常冷却時における水冷パイプ３及
びガス冷却パイプ２の末端部分を示し、冷却水流方向制
御弁９は冷却水給排水装置６側に開通している。矢印は
前記同様冷却水及び冷却ガスの流れ方向を示す。FIG. 3 (a) shows the flow of cooling water and cooling gas near the on-off valve 1 during normal cooling, in which there is no abnormality in the refractory or the steel shell and there is no sharp rise in the steel shell temperature. The water cooling pipe 3 and the gas cooling pipe 2 are filled with cooling water and cooling gas, respectively, and the on-off valve 1 is closed so that the cooling water and cooling gas do not interfere with each other and flow independently in the directions of arrows. The flow directions of the cooling water and the cooling gas may be opposite.
FIG. 2A shows the end portions of the water cooling pipe 3 and the gas cooling pipe 2 during normal cooling, and the cooling water flow direction control valve 9 is open to the cooling water supply / drainage device 6 side. Arrows indicate the flow directions of the cooling water and the cooling gas as described above.
【００２１】図３（ｂ）は、緊急排水時の状態を示す。
即ち、開閉弁１又は開閉弁１近傍の温度センサー１０が
鉄皮破損の前兆となる温度変化を検知したとき、開閉弁
１は直ちに開通する。図２（ｂ）に示すように、冷却ガ
スは、この開通より若干早く冷却ガス給排気装置５によ
って矢印に示すように給気口及び排気口からの供給が始
められ、ガス冷却パイプ２内の圧力が高まる。この後開
閉弁１が開通すると、冷却ガスの圧力によって水冷パイ
プ３内の冷却水は矢印のごとく除去されていく。このと
き、冷却ガスの圧力は冷却水を速やかに除去しうる圧力
に設定される。FIG. 3B shows a state at the time of emergency drainage.
That is, when the on-off valve 1 or the temperature sensor 10 in the vicinity of the on-off valve 1 detects a temperature change which is a sign of the breakage of the steel, the on-off valve 1 is opened immediately. As shown in FIG. 2 (b), the supply of the cooling gas from the supply port and the exhaust port is started slightly earlier than the opening of the cooling gas by the cooling gas supply / exhaust device 5 as shown by arrows, and the gas in the gas cooling pipe 2 is opened. Pressure increases. Thereafter, when the on-off valve 1 is opened, the cooling water in the water cooling pipe 3 is removed as indicated by the arrow due to the pressure of the cooling gas. At this time, the pressure of the cooling gas is set to a pressure at which the cooling water can be quickly removed.
【００２２】開閉弁は温度センサーの信号を検知した制
御系からの電気信号によって作動するが、開閉は電磁弁
のような電磁気的方法、モーターなどを使った機械的方
法、又は油圧式方法等が適当である。The on-off valve is operated by an electric signal from a control system which detects the signal of the temperature sensor. The on-off valve is opened or closed by an electromagnetic method such as a solenoid valve, a mechanical method using a motor, or a hydraulic method. Appropriate.
【００２３】図２（ｂ）は緊急排水時の状態を示す。冷
却水給排水装置６は、冷却ガス給排気装置５の制御より
更に若干早く給排水を停止し、更に冷却水流方向制御弁
９は、水冷パイプ３を緊急排水槽４側に開通する。前記
一連の動作によって除去されてきた冷却水は、速やかに
緊急排水槽４に排水される。FIG. 2B shows a state at the time of emergency drainage. The cooling water supply / drainage device 6 stops the supply / drainage slightly earlier than the control of the cooling gas supply / exhaust device 5, and the cooling water flow direction control valve 9 opens the water cooling pipe 3 to the emergency drainage tank 4 side. The cooling water removed by the above series of operations is immediately drained to the emergency drain tank 4.
【００２４】本発明に用いる温度センサー及び温度測定
系は、鉄皮破損の可能性がある範囲において、鉄皮破損
の前兆となる鉄皮の温度変化を漏れなく検知できれば、
特に限定しない。例えば熱電対を鉄皮に隈無く設置して
温度変化を監視しても良い。しかしながら、より簡単に
任意の位置の温度を監視するために、本発明では光ファ
イバーを用いることが好ましい。具体的には、光ファイ
バー線を、水冷パイプ又はガス冷却パイプに沿った鉄皮
や、これらの設置されていない部分の鉄皮にも張り巡ら
せておくことによって、光ファイバー線の任意の位置の
温度監視が可能となる。例えば図３に示すような温度セ
ンサー１０用の信号線１１を光ファイバーに置き換えれ
ば、温度センサー１０を光ファイバー上の任意の位置に
無限個設置した効果がある。The temperature sensor and the temperature measuring system used in the present invention are capable of detecting a temperature change of a steel bar which is a precursor of the steel bar damage within a range where the steel bar may be damaged, without any omission.
There is no particular limitation. For example, thermocouples may be installed all over a steel shell to monitor temperature changes. However, in order to more easily monitor the temperature at an arbitrary position, it is preferable to use an optical fiber in the present invention. Specifically, by arranging the optical fiber wire around the steel shell along the water cooling pipe or gas cooling pipe, or the steel shell where these parts are not installed, the temperature of the optical fiber line at any position can be monitored. Becomes possible. For example, if the signal line 11 for the temperature sensor 10 as shown in FIG. 3 is replaced with an optical fiber, there is an effect that an infinite number of the temperature sensors 10 are installed at arbitrary positions on the optical fiber.
【００２５】本発明では、開閉弁１自身に温度検知手段
を有し、所定の温度以上になったときに自動的に開く機
構を備えたものを用いることも可能である。前記の温度
監視によって開閉弁を制御するのでは、温度監視系が不
作動となった場合、例えば熱電対や光ファイバーが断線
した場合、復帰するまでのたとえ短時間であっても安全
な冷却が行えなくなる恐れがある。従って、開閉弁自身
に温度上昇に感応して開く、例えば形状記憶材やバイメ
タルを用いることによって、より安全な冷却が可能とな
る。形状記憶材等を用いることにより、同時に自動的に
開閉弁が開く機構も実現することができる。In the present invention, it is also possible to use a valve having a temperature detecting means in the on-off valve 1 itself and having a mechanism for automatically opening when the temperature reaches a predetermined temperature or higher. By controlling the on-off valve by the temperature monitoring, when the temperature monitoring system is inoperative, for example, when a thermocouple or an optical fiber is broken, safe cooling can be performed even in a short time until recovery. There is a risk of disappearing. Therefore, safer cooling can be achieved by using, for example, a shape memory material or a bimetal for the on-off valve itself in response to a temperature rise. By using a shape memory material or the like, a mechanism for automatically opening the on-off valve at the same time can be realized.
【００２６】本発明の冷却装置は、図１に示したように
水冷パイプ及びガス冷却パイプを鉄皮表面に設置する構
造が設計や保守点検も容易である。As shown in FIG. 1, the cooling device of the present invention has a structure in which a water-cooling pipe and a gas-cooling pipe are installed on the surface of a steel shell, so that design and maintenance and inspection are easy.
【００２７】一方で、鉄皮８と耐火物７の間には隙間が
できる場合が多く、鉄皮使用寿命を延ばす点では前記構
造で十分であるが、耐火物７の保護や損耗抑制のために
は耐火物７を直接冷却することがより効果的である。ま
た、鉄皮８と耐火物７の間に隙間ができた場合、耐火物
７の異常損耗による温度上昇が即座に鉄皮８の温度上昇
に反映しない場合がある。そこで本発明では、冷却部位
によっては図４に示すように水冷パイプ３及びガス冷却
パイプ２、更には温度センサー１０を耐火物７内に埋設
させた構造を用いることもできる。On the other hand, a gap is often formed between the steel shell 8 and the refractory 7, and the above structure is sufficient in extending the service life of the steel shell. It is more effective to directly cool the refractory 7. Further, when a gap is formed between the steel 8 and the refractory 7, the temperature rise due to abnormal wear of the refractory 7 may not be immediately reflected in the temperature rise of the steel 8. Therefore, in the present invention, a structure in which the water cooling pipe 3, the gas cooling pipe 2, and the temperature sensor 10 are embedded in the refractory 7, as shown in FIG.
【００２８】本発明の冷却方法を図５に示す。正常冷却
時においては、温度センサー１０に急激な温度変化は検
知されず、開閉弁１は閉じ、冷却ガス給排気装置５は冷
却ガスパイプ２の一方から給気、他方から排気作動し、
冷却水給排水装置６は水冷パイプ３の一方から給水、他
方から排水作動し、冷却水流方向制御弁９は冷却水給排
水装置６側に開の状態にある。これをすべてＯＦＦ状態
とし、温度センサー１０に所定温度上昇が検知された時
点で緊急排水系が作動するＯＮ状態とする。この温度セ
ンサー検知に連動して、先ず冷却水給排水装置６は水冷
パイプ３への給排水動作を停止し、引き続いて冷却水流
方向制御弁９を緊急排水槽４側に開の状態にする。次
に、冷却ガス給排気装置５は冷却ガスパイプ２の給気
口、排気口を全て給気口として作動し、最後に温度上昇
を検知した温度センサー１０に最も近い開閉弁１を開に
して、冷却ガスによって冷却水を緊急排水する。FIG. 5 shows the cooling method of the present invention. During normal cooling, a rapid temperature change is not detected by the temperature sensor 10, the on-off valve 1 is closed, and the cooling gas supply / exhaust device 5 operates to supply air from one of the cooling gas pipes 2 and exhaust from the other.
The cooling water supply / drainage device 6 supplies water from one side of the water cooling pipe 3 and drains from the other, and the cooling water flow direction control valve 9 is open toward the cooling water supply / drainage device 6. These are all turned off, and the emergency drainage system is turned on when the temperature sensor 10 detects a predetermined temperature rise. In conjunction with the detection of the temperature sensor, first, the cooling water supply / drainage device 6 stops the operation of supplying / draining water to / from the water cooling pipe 3 and subsequently opens the cooling water flow direction control valve 9 to the emergency drainage tank 4 side. Next, the cooling gas supply / exhaust device 5 operates all the supply ports and exhaust ports of the cooling gas pipe 2 as supply ports, and finally opens the on-off valve 1 closest to the temperature sensor 10 that has detected a temperature rise, Emergency drainage of cooling water with cooling gas.
【００２９】尚、本発明において、冷却ガスとして空
気、不活性ガス等が用いられる。In the present invention, air, an inert gas or the like is used as the cooling gas.
【００３０】[0030]
【実施例１】実験室において、３ｍ×３ｍの仮想鉄皮の
外側に水冷パイプとガス冷却パイプを３０ｃｍ間隔で並
列して溶接設置し、パイプ１ｍ長に１個の割合でそれぞ
れのパイプを接続するように電磁式開閉弁を取り付けた
仮想溶融金属容器を作成した。また、水冷パイプに隣接
させて光ファイバーを通した金属製導管を施設した。水
冷パイプとガス冷却パイプには各々冷却水給排水装置、
冷却ガス給排気装置を接続し、電磁式冷却水流方向制御
弁を介して水冷パイプと冷却水給排水装置を接続し、緊
急排水槽に排水できるようにした。光ファイバー式温度
分布測定装置、電磁式開閉弁、冷却水給排水装置、冷却
ガス給排気装置、電磁式冷却水流方向制御弁でシーケン
ス制御系を組立て、本発明の冷却装置とした。次に、水
冷パイプに水、ガス冷却パイプに空気を流し、冷却装置
を作動させた。緊急排水作動温度として鉄皮温度９０℃
に設定した。この状態で光ファイバーによって検出され
る温度は、どの位置もほぼ水温を示した。そこで任意の
鉄皮の内側よりガスバーナーを用い局部的に加熱を行っ
たところ、加熱部位近傍の光ファイバーで検出される鉄
皮の温度が９０℃を越えた時点で緊急排水系が作動し、
冷却水は水冷パイプより完全に排出された。このとき水
冷パイプ及びガス冷却パイプには共に空気が流れている
状態となり、鉄皮は空冷状態にあるが冷却能が低下し、
引き続き加熱を行っていると鉄皮が赤熱し破損の兆候を
示したので試験を終了した。[Example 1] In a laboratory, water-cooled pipes and gas-cooled pipes were welded and installed in parallel at intervals of 30 cm outside of a 3 m x 3 m virtual steel shell, and each pipe was connected at a ratio of 1 m per pipe. A virtual molten metal container equipped with an electromagnetic on-off valve was prepared. In addition, a metal conduit through an optical fiber was installed adjacent to the water cooling pipe. The water cooling pipe and the gas cooling pipe each have a cooling water supply / drainage device,
A cooling gas supply / exhaust device was connected, and a water cooling pipe and a cooling water supply / drainage device were connected via an electromagnetic cooling water flow direction control valve so that the water could be drained to an emergency drainage tank. A sequence control system was assembled by using an optical fiber type temperature distribution measuring device, an electromagnetic on-off valve, a cooling water supply / drainage device, a cooling gas supply / exhaust device, and an electromagnetic cooling water flow direction control valve to obtain a cooling device of the present invention. Next, water was passed through the water cooling pipe and air was passed through the gas cooling pipe, and the cooling device was operated. Emergency drainage temperature is 90 ° C.
Set to. In this state, the temperature detected by the optical fiber showed almost the water temperature at every position. Therefore, when heating was performed locally using a gas burner from the inside of any steel shell, the emergency drainage system was activated when the temperature of the steel shell detected by the optical fiber near the heated part exceeded 90 ° C,
The cooling water was completely discharged from the water cooling pipe. At this time, the air is flowing through both the water cooling pipe and the gas cooling pipe, and the steel shell is in the air cooling state, but the cooling capacity is reduced,
If the heating was continued, the steel skin glowed red and showed signs of breakage, so the test was terminated.
【００３１】[0031]
【実施例２】実施例１により本発明の冷却装置の動作が
確認されたので、実炉に適用した。転炉の直胴部外鉄皮
に幅１ｍ×半周に渡って水冷パイプとガス冷却パイプを
３０ｃｍ間隔で並列に溶接設置し、パイプ１ｍ長に１個
の割合でそれぞれのパイプを接続するように電磁式開閉
弁を取り付けた。水冷パイプとガス冷却パイプには各々
冷却水給排水装置、冷却ガス給排気装置を接続し、電磁
式冷却水流方向制御弁を介して水冷パイプと冷却水給排
水装置を接続し、緊急排水槽に排水できるようにした。
また、光ファイバーを通した金属製導管を水冷パイプに
隣接させて施設した。光ファイバー式温度分布測定装
置、電磁式開閉弁、冷却水給排水装置、冷却ガス給排気
装置、電磁式冷却水流方向制御弁でシーケンス制御系を
組立て、本発明の冷却装置とした。Example 2 The operation of the cooling apparatus of the present invention was confirmed by Example 1, and the apparatus was applied to an actual furnace. Water-cooled pipes and gas-cooled pipes are welded and installed in parallel on the outer shell of the converter body at a width of 1 m x half-circle at 30 cm intervals, and each pipe is connected at a rate of one pipe per meter of pipe length. An electromagnetic on-off valve was installed. The cooling water supply / drainage device and the cooling gas supply / exhaust device are connected to the water cooling pipe and the gas cooling pipe, respectively, and the water cooling pipe and the cooling water supply / drainage device are connected via the electromagnetic cooling water flow direction control valve, and can be drained to the emergency drainage tank. I did it.
In addition, a metal conduit through an optical fiber was installed adjacent to the water cooling pipe. A sequence control system was assembled by using an optical fiber type temperature distribution measuring device, an electromagnetic on-off valve, a cooling water supply / drainage device, a cooling gas supply / exhaust device, and an electromagnetic cooling water flow direction control valve to obtain a cooling device of the present invention.
【００３２】内張り耐火物の最も薄い部分の残厚が２０
０ｍｍ以下になった時点より、光ファイバーで鉄皮温度
を測定しながら冷却装置を作動させた。緊急排水温度は
９０℃に設定した。実炉試験においては耐火物残厚管理
によって補修を行っていたので、本発明の冷却装置を使
用中に一度も緊急排水状態には至らなかった。The remaining thickness of the thinnest part of the refractory lining is 20
From the time when the temperature became 0 mm or less, the cooling device was operated while measuring the steel shell temperature with an optical fiber. The emergency drainage temperature was set at 90 ° C. In the actual furnace test, the repair was performed by the refractory residue thickness management, and thus the cooling device of the present invention did not reach the state of emergency drainage at least once during use.
【００３３】耐火物残厚管理による限界まで使用してか
ら炉止めを行い、直胴部半周の冷却側と反対の非冷却側
の残厚測定を行ったところ、平均的な残厚は各々約１０
０ｍｍ、約５０ｍｍであった。この結果冷却部位は損耗
量が少なく、炉稼働中の補修量も減っていた。After the furnace was stopped to the limit by the refractory residual thickness control, the furnace was stopped, and the residual thickness measurement was performed on the non-cooling side opposite to the cooling side of the half body of the straight body. 10
0 mm and about 50 mm. As a result, the amount of wear in the cooling part was small, and the amount of repair during furnace operation was also reduced.
【００３４】[0034]
【発明の効果】本発明により、溶融金属容器を安全に冷
却することが可能となり、溶融金属容器の寿命延長と耐
火物などの設備費の削減が可能となる。According to the present invention, the molten metal container can be cooled safely, the life of the molten metal container can be prolonged, and the cost of equipment such as refractories can be reduced.
【図１】本発明の炉体冷却装置の例を示す図である。FIG. 1 is a diagram showing an example of a furnace body cooling device of the present invention.
【図２】水冷パイプ及びガス冷却パイプの末端における
冷却ガス及び冷却水の流れを示す図である。FIG. 2 is a diagram showing flows of cooling gas and cooling water at the ends of a water cooling pipe and a gas cooling pipe.
【図３】開閉弁近傍の冷却ガス及び冷却水の流れを示す
図である。FIG. 3 is a diagram showing flows of cooling gas and cooling water near an on-off valve.
【図４】本発明の炉体冷却装置の他の例を示す図であ
る。FIG. 4 is a view showing another example of the furnace body cooling device of the present invention.
【図５】本発明の炉体冷却方法を示す図である。FIG. 5 is a view showing a furnace body cooling method of the present invention.
１ 開閉弁 ２ ガス冷却パイプ ３ 水冷パイプ ４ 緊急排水槽 ５ 冷却ガス給排気装置 ６ 冷却水給排水装置 ７ 耐火物 ８ 鉄皮 ９ 冷却水流方向制御弁 １０ 温度センサー １１ 信号線 DESCRIPTION OF SYMBOLS 1 Opening / closing valve 2 Gas cooling pipe 3 Water cooling pipe 4 Emergency drainage tank 5 Cooling gas supply / exhaust device 6 Cooling water supply / drainage device 7 Refractory 8 Steel shell 9 Cooling water flow direction control valve 10 Temperature sensor 11 Signal line
Claims (7)
を備えた溶融金属容器において、該鉄皮の外側に取り付
けられた水冷パイプに並列にガス冷却パイプを設置し、
水冷パイプとガス冷却パイプの間が開閉弁を介して接続
されていることを特徴とする炉体冷却装置。In a molten metal container provided with a refractory-lined and water-cooled steel shell, a gas cooling pipe is installed in parallel with a water-cooled pipe attached outside the steel shell,
A furnace body cooling device wherein a water cooling pipe and a gas cooling pipe are connected via an on-off valve.
流方向制御弁が水冷パイプの給水口及び排水口に設けら
れていることを特徴とする請求項１記載の炉体冷却装
置。2. The furnace body cooling device according to claim 1, wherein cooling water flow direction control valves controlled in conjunction with the on-off valve are provided at a water supply port and a drain port of a water cooling pipe.
の少なくとも１箇所に温度センサーを設置し、当該温度
センサーで検知した温度が所定の温度以上になった場合
に該開閉弁を開く機構を備えたことを特徴とする請求項
１又は２記載の炉体冷却装置。3. A temperature sensor is provided at at least one position outside the steel shell in the vicinity of the on-off valve or on-off valve, and the on-off valve is opened when the temperature detected by the temperature sensor becomes equal to or higher than a predetermined temperature. 3. The furnace body cooling device according to claim 1, further comprising a mechanism.
を特徴とする請求項３記載の炉体冷却装置。4. The furnace body cooling device according to claim 3, wherein the temperature sensor is an optical fiber.
の温度以上になったときに自動的に開閉弁が開く機構を
備えたことを特徴とする請求項１〜４のいずれか記載の
炉体冷却装置。5. The on-off valve according to claim 1, wherein the on-off valve itself has a temperature detecting means, and a mechanism for automatically opening the on-off valve when the temperature reaches a predetermined temperature or higher. Furnace body cooling device.
内に配置されていることを特徴とする請求項１〜５のい
ずれか記載の炉体冷却装置。6. The furnace body cooling device according to claim 1, wherein the water cooling pipe and the gas cooling pipe are arranged in the refractory.
装置を用いて、前記開閉弁が設置されている場所又はそ
の近傍の温度が所定の温度以上になったとき、前記開閉
弁を開いてガスを水冷パイプ内に流し、水冷パイプ内の
冷却水を冷却ガスにより水冷パイプ内から除去すること
を特徴とする炉体冷却方法。7. The on-off valve according to claim 1, wherein a temperature of a place where the on-off valve is installed or a temperature in the vicinity thereof is equal to or higher than a predetermined temperature by using the furnace body cooling device according to claim 1. Opening the gas to flow into the water cooling pipe, and removing the cooling water in the water cooling pipe from the water cooling pipe with the cooling gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10213463A JP2000035288A (en) | 1998-07-14 | 1998-07-14 | Apparatus and method for cooling furnace body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10213463A JP2000035288A (en) | 1998-07-14 | 1998-07-14 | Apparatus and method for cooling furnace body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000035288A true JP2000035288A (en) | 2000-02-02 |
Family
ID=16639634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10213463A Withdrawn JP2000035288A (en) | 1998-07-14 | 1998-07-14 | Apparatus and method for cooling furnace body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000035288A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458340C (en) * | 2002-11-28 | 2009-02-04 | 侯松发 | Electric arc furnace with cooling water circulating system |
| CN102865739A (en) * | 2012-10-13 | 2013-01-09 | 云南新立有色金属有限公司 | Method for cooling furnace body of titanium-slag smelting direct-current electric-arc furnace |
| CN104017934A (en) * | 2014-06-26 | 2014-09-03 | 中冶华天南京工程技术有限公司 | Water swivel for converter water cooling system and converter water cooling system |
| KR102474560B1 (en) * | 2022-05-09 | 2022-12-06 | 주식회사 이지에버텍 | Apparatus for preventing explosion of radioactive melting decontamination electric furnace with double cooling coil |
-
1998
- 1998-07-14 JP JP10213463A patent/JP2000035288A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458340C (en) * | 2002-11-28 | 2009-02-04 | 侯松发 | Electric arc furnace with cooling water circulating system |
| CN102865739A (en) * | 2012-10-13 | 2013-01-09 | 云南新立有色金属有限公司 | Method for cooling furnace body of titanium-slag smelting direct-current electric-arc furnace |
| CN104017934A (en) * | 2014-06-26 | 2014-09-03 | 中冶华天南京工程技术有限公司 | Water swivel for converter water cooling system and converter water cooling system |
| CN104017934B (en) * | 2014-06-26 | 2015-11-04 | 中冶华天南京工程技术有限公司 | Converter water-cooling system water swivel joint and converter water-cooling system |
| KR102474560B1 (en) * | 2022-05-09 | 2022-12-06 | 주식회사 이지에버텍 | Apparatus for preventing explosion of radioactive melting decontamination electric furnace with double cooling coil |
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