JP2003129125A - Continuous heat treatment furnace for strip - Google Patents
Continuous heat treatment furnace for stripInfo
- Publication number
- JP2003129125A JP2003129125A JP2001317329A JP2001317329A JP2003129125A JP 2003129125 A JP2003129125 A JP 2003129125A JP 2001317329 A JP2001317329 A JP 2001317329A JP 2001317329 A JP2001317329 A JP 2001317329A JP 2003129125 A JP2003129125 A JP 2003129125A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- furnace
- seal
- dew point
- inlet
- 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.)
- Pending
Links
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は金属ストリップを炉
内搬送し雰囲気ガスの基で連続的に熱処理炉するストリ
ップ連続熱処理炉に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip continuous heat treatment furnace which conveys metal strips in a furnace and continuously heat-treats them under the atmosphere gas.
【０００２】[0002]
【従来の技術】本出願人の特許出願に係る特開平１１−
１０６８３３号公報に記載された連続熱処理炉は、金属
ストリップの入口と出口に夫々シールロールによって仕
切されたシール室が設けられ、該各シール室が一定の圧
力以上になるようにＮ２等のシールガスを供給すること
で、外気の侵入と炉内雰囲気ガスの漏洩を防ごうとする
ものである。2. Description of the Related Art Japanese Patent Application Laid-Open No. 11-
The continuous heat treatment furnace described in Japanese Patent No. 106833 is provided with a seal chamber partitioned by a seal roll at the inlet and the outlet of a metal strip, respectively, and seals each chamber with N 2 or the like so that the seal chamber has a certain pressure or more. By supplying the gas, it is intended to prevent the invasion of the outside air and the leakage of the atmosphere gas in the furnace.
【０００３】しかしながら従来の連続熱処理炉では炉内
に雰囲気ガスを常に多量に供給していないと炉内温度が
大きく変動した時にシール室からシールガスが外気をも
巻き込んで炉内に逆流することがあった。そこで炉内と
シール室との差圧を検出し雰囲気ガスの供給量を制御す
ることも検討されたが、その差圧は微小であって検出が
困難であったので、この差圧検出に基づき雰囲気ガスの
供給量を制御することも困難であった。However, in the conventional continuous heat treatment furnace, if a large amount of atmospheric gas is not always supplied into the furnace, the seal gas may also entrain the outside air from the seal chamber and flow back into the furnace when the temperature in the furnace greatly changes. there were. Therefore, it was considered to detect the differential pressure between the furnace and the seal chamber to control the supply amount of the atmospheric gas, but the differential pressure was so small that it was difficult to detect it. It was also difficult to control the supply amount of the atmospheric gas.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記問題点を
解消し、常に適切に雰囲気ガスの供給が制御され、雰囲
気ガスの消費を節減するとともに、外気の侵入と炉内雰
囲気ガスの漏洩がより確実に防止されるようにするもの
である。DISCLOSURE OF THE INVENTION The present invention solves the above problems and always controls the supply of the atmospheric gas appropriately to reduce the consumption of the atmospheric gas and to prevent the invasion of the outside air and the leakage of the atmospheric gas in the furnace. It is intended to prevent it more reliably.
【０００５】[0005]
【課題を解決するための手段】そのために本発明は、金
属ストリップの入口と出口に夫々シールロールによって
仕切されたシール室を設け、該各シール室にシールガス
を供給するとともに、炉体内に雰囲気ガスを供給し、炉
体内の入口側シール室付近から炉内ガスを強制的に吸引
し該炉内ガスを再生して炉体内に循環させる雰囲気ガス
再生装置を備えたストリップ連続熱処理炉において、雰
囲気ガス再生装置の一次側の雰囲気ガス濃度を検出する
濃度計を設け、その濃度が所定値に維持されるように前
記雰囲気ガスの供給を制御することを特徴とする。ま
た、本発明は、金属ストリップの入口と出口に夫々シー
ルロールによって仕切されたシール室を設け、該各シー
ル室にシールガスを供給するとともに、炉体内に雰囲気
ガスを供給し、炉体内の入口側シール室付近から炉内ガ
スを強制的に吸引し該炉内ガスを再生して炉体内に循環
させる雰囲気ガス再生装置を備えたストリップ連続熱処
理炉において、炉体内の冷却帯の入口付近に炉内ガスの
露点を検出する露点計を設け、その露点が所定値に維持
されるように前記雰囲気ガスの供給を制御することを特
徴とする。また、本発明は、金属ストリップの入口と出
口に夫々シールロールによって仕切されたシール室を設
け、該各シール室にシールガスを供給するとともに、炉
体内に雰囲気ガスを供給し、炉体内の入口側シール室付
近から炉内ガスを強制的に吸引し該炉内ガスを再生して
炉体内に循環させる雰囲気ガス再生装置を備えたストリ
ップ連続熱処理炉において、雰囲気ガス再生装置の一次
側の雰囲気ガス濃度を検出する濃度計を設け、炉体内の
冷却帯の入口付近に炉内ガスの露点を検出する露点計を
設け、その濃度および露点が所定値に維持されるように
雰囲気ガスの供給を制御することを特徴とする。To this end, according to the present invention, a seal chamber partitioned by a seal roll is provided at each of the inlet and the outlet of the metal strip, and a seal gas is supplied to each of the seal chambers and an atmosphere is provided in the furnace body. Atmosphere in a strip continuous heat treatment furnace equipped with a gas supply device for supplying gas, forcibly sucking in the furnace gas from the vicinity of the inlet side seal chamber in the furnace body to regenerate the furnace gas and circulate the gas in the furnace body A concentration meter for detecting the atmospheric gas concentration on the primary side of the gas regenerator is provided, and the supply of the atmospheric gas is controlled so that the concentration is maintained at a predetermined value. Further, the present invention provides a seal chamber partitioned by a seal roll at the inlet and the outlet of the metal strip respectively, and supplies a seal gas to each of the seal chambers and an atmospheric gas to the inside of the furnace, In a strip continuous heat treatment furnace equipped with an atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity of the side seal chamber to regenerate the furnace gas and circulate it in the furnace body, a furnace near the inlet of the cooling zone in the furnace body A dew point meter for detecting the dew point of the inner gas is provided, and the supply of the atmospheric gas is controlled so that the dew point is maintained at a predetermined value. Further, the present invention provides a seal chamber partitioned by a seal roll at the inlet and the outlet of the metal strip respectively, and supplies a seal gas to each of the seal chambers and an atmospheric gas to the inside of the furnace, In a strip continuous heat treatment furnace equipped with an atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity of the side seal chamber and regenerating the furnace gas to circulate in the furnace body, the atmosphere gas on the primary side of the atmosphere gas regenerator A concentration meter to detect the concentration is installed, and a dew point meter to detect the dew point of the gas in the furnace is installed near the inlet of the cooling zone in the furnace body, and the supply of atmospheric gas is controlled so that the concentration and the dew point are maintained at predetermined values. It is characterized by doing.
【０００６】[0006]
【発明の実施の形態】次に本発明の実施形態を図面に従
い説明する。図１は本発明に係るストリップ連続熱処理
炉に設けられたガス供給路の系統図である。この実施形
態に示した炉体１は、金属ストリップ２が吊下されるス
テアリングロール３およびディフェクターロール４が設
けられた逆Ｕ字形の縦型炉で、５は加熱・均熱帯、６は
冷却帯である。該炉体１の両下端部に金属ストリップ２
の入口および出口となるシール室７およびシール室８が
設けられている。９はシール室７の入口に金属ストリッ
プ２を両側から挟むように設けた一対のシールロール、
１０はシール室７と炉体１内とを仕切るように設けられ
た一対のシールロールである。１１は該シール室７の圧
力を検出する圧力計である。そして、該圧力計から圧力
指示調節計１２に検出圧力が伝達され、シール室７の圧
力が常に３０ｍｍＡｑに保たれるように該圧力指示調節
計１２が流量調節弁１３を操作しシールガスとしてのＮ
２が該シール室７に適量供給されるようにしている。ま
た、１５はシール室８の出口に金属ストリップ２を両側
から挟むように設けた一対のシールロール、１６はシー
ル室８と炉体１内とを仕切るように設けられた一対のシ
ールロール、１７はシール室８の圧力を検出する圧力計
で、シール室７と同様に該圧力計から圧力指示調節計１
８に検出圧力が伝達され、該シール室８の圧力が常に３
０ｍｍＡｑに保たれるように該圧力指示調節計１８が流
量調節弁１９を操作しＮ２を該シール室８に適量供給す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram of a gas supply path provided in a strip continuous heat treatment furnace according to the present invention. The furnace body 1 shown in this embodiment is an inverted U-shaped vertical furnace provided with a steering roll 3 on which a metal strip 2 is suspended and a deflector roll 4, and 5 is heating and soaking, 6 is cooling. It is a belt. Metal strips 2 are provided on both lower ends of the furnace body 1.
There are provided a seal chamber 7 and a seal chamber 8 which serve as an inlet and an outlet. A pair of seal rolls 9 are provided at the entrance of the seal chamber 7 so as to sandwich the metal strip 2 from both sides,
Reference numeral 10 denotes a pair of seal rolls provided so as to partition the seal chamber 7 and the furnace body 1 from each other. Reference numeral 11 is a pressure gauge for detecting the pressure in the seal chamber 7. Then, the detected pressure is transmitted from the pressure gauge to the pressure indicating controller 12, and the pressure indicating controller 12 operates the flow rate adjusting valve 13 so that the pressure in the seal chamber 7 is always maintained at 30 mmAq, and the pressure indicating controller 12 operates as a seal gas. N
2 is supplied to the seal chamber 7 in an appropriate amount. Further, 15 is a pair of seal rolls provided at the outlet of the seal chamber 8 so as to sandwich the metal strip 2 from both sides, 16 is a pair of seal rolls provided so as to partition the seal chamber 8 and the furnace body 1, 17 Is a pressure gauge for detecting the pressure in the seal chamber 8.
8, the detected pressure is transmitted, and the pressure in the seal chamber 8 is always 3
The pressure indicator controller 18 operates the flow rate control valve 19 so as to maintain 0 mmAq, and supplies an appropriate amount of N 2 to the seal chamber 8.
【０００７】２０は雰囲気ガスを炉体１の冷却帯６付近
に供給するために設けられた雰囲気ガス供給路で、該供
給路では夫々流量指示調節計２３，２４により操作され
る流量調節弁２１，２２を経ることにより、Ｈ２とＮ２
とが３：１の割合で混合されて還元性雰囲気ガスが生成
される。２５はその比率設定器、２６，２７は夫々検出
信号を該流量指示調節計２３，２４にフィードバックす
る流量計である。Reference numeral 20 is an atmosphere gas supply passage provided for supplying the atmosphere gas to the vicinity of the cooling zone 6 of the furnace body 1. In the supply passage, a flow rate adjusting valve 21 operated by flow rate indicating controllers 23 and 24, respectively. , 22 to produce H 2 and N 2
And are mixed at a ratio of 3: 1 to generate a reducing atmosphere gas. Reference numeral 25 is a ratio setting device, and reference numerals 26 and 27 are flow meters for feeding back detection signals to the flow rate indicating controllers 23 and 24, respectively.
【０００８】また、３０は炉体１内の入口側シール室７
付近から炉内ガスを強制的に吸引し炉内ガス中の水分等
を除去して冷却帯６付近に循環させる雰囲気ガス再生装
置、３１は該再生装置の一次側にて炉内の雰囲気ガス濃
度（Ｈ２濃度）を検出するために設けられた濃度計、３
２は炉内の露点を検出するために冷却帯６の入口付近に
設けられた露点計である。Further, 30 is an inlet side seal chamber 7 in the furnace body 1.
An atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity to remove water and the like in the furnace gas and circulate the gas in the vicinity of the cooling zone 6, and 31 is an atmosphere gas concentration in the furnace on the primary side of the regenerator. Densitometer provided to detect (H 2 concentration), 3
Reference numeral 2 is a dew point meter provided near the inlet of the cooling zone 6 for detecting the dew point in the furnace.
【０００９】濃度計３１と露点計３２の検出信号は夫々
濃度指示調節計３３，露点指示調節計３４に伝達され、
その偏差の比例値と積分値と微分値とを組合わせたＰＩ
Ｄ制御により操作量を夫々ハイセレクタ３５に出力す
る。ハイセレクタ３５は濃度指示調節計３３から出力さ
れた操作量と露点指示調節計３４から出力された操作量
と最小操作量設定器３６の出力操作量とを比較し、その
いずれか高い方の操作量を前記流量指示調節計２３に直
接指示するとともに比率設定器２５を介して前記流量指
示調節計２４にも指示する。ちなみに図２は、濃度指示
調節計３３から出力される操作量Ｈ２ＭＶと、露点指示
調節計３４から出力される操作量ＤＰＭＶと、最小操作
量設定器３６の出力操作量ＳＶの変動を夫々破断線で示
し、ハイセレクタ３５から出力される操作量を太線で示
したグラフである。なお、処理目的に応じて濃度指示調
節計３３にはＨ２濃度として例えば７０％が設定され、
露点指示調節計３４にはマイナス４０℃が設定される。The detection signals of the densitometer 31 and the dew point indicator 32 are transmitted to the concentration indicator controller 33 and the dew point indicator controller 34, respectively.
PI that combines the proportional value, integral value, and derivative value of the deviation
The manipulated variables are output to the high selector 35 by the D control. The high selector 35 compares the operation amount output from the concentration indicating controller 33, the operation amount output from the dew point indicating controller 34, and the output operation amount of the minimum operation amount setting device 36, and the operation whichever is higher is compared. The amount is directly instructed to the flow rate instruction controller 23 and also to the flow rate instruction controller 24 via the ratio setting device 25. By the way, FIG. 2 shows changes in the manipulated variable H 2 MV output from the concentration indicator controller 33, the manipulated variable DPMV output from the dew point indicator controller 34, and the output manipulated variable SV of the minimum manipulated variable setter 36, respectively. 9 is a graph in which a broken line is shown and an operation amount output from the high selector 35 is shown in a thick line. Note that, for example, 70% is set as the H 2 concentration in the concentration indicating controller 33 according to the processing purpose,
The dew point indicating controller 34 is set at -40 ° C.
【００１０】このため、濃度計３１の検出値が濃度指示
調節計３３の設定値である７０％を下回るとハイセレク
タ３５に図２に示したように操作量Ｈ２ＭＶが出力さ
れ、露点計３２の検出値が露点指示調節計３４の設定値
であるマイナス４０℃以上となるとハイセレクタ３５に
操作量ＤＰＭＶが出力される。そして、これらの操作量
が最小操作量設定器３６の出力操作量ＳＶを上回ると、
その大きい方の操作量が流量指示調節計２３に指示さ
れ、流量指示調節計２４にはその操作量の一定比率が指
示される。このように常に大きい方の操作量が指示され
ることにより、炉体１に必要十分な雰囲気ガスを無駄な
く供給することができる。Therefore, when the detected value of the densitometer 31 falls below 70% which is the set value of the concentration indicator controller 33, the manipulated variable H 2 MV is output to the high selector 35 as shown in FIG. When the detected value of 32 becomes equal to or higher than the set value of the dew point indicating controller 34, that is, minus 40 ° C., the manipulated variable DPMV is output to the high selector 35. When these manipulated variables exceed the output manipulated variable SV of the minimum manipulated variable setter 36,
The larger operation amount is instructed to the flow rate indicating controller 23, and the flow rate indicating controller 24 is instructed to a constant ratio of the operation amount. In this way, by always instructing the larger operation amount, the necessary and sufficient atmosphere gas can be supplied to the furnace body 1 without waste.
【００１１】なお、炉内雰囲気ガス濃度は、雰囲気ガス
再生装置３０によってシール室７付近から吸引された炉
内ガスが濃度計３１により検出されることから、金属ス
トリップ２に付随して炉内に侵入した外気に素早く反応
し、必要な雰囲気ガスが即座に供給され、酸化が防止さ
れる。The concentration of the atmospheric gas in the furnace is determined by the densitometer 31 which detects the gas in the furnace sucked from the vicinity of the seal chamber 7 by the atmosphere gas regenerator 30. It quickly reacts to the invading outside air, supplies the necessary atmospheric gas immediately, and prevents oxidation.
【００１２】また、冷却帯６の入口付近は、炉内ガス温
度が低く露点が上昇し易いうえに、金属ストリップ２の
温度が高いので、金属ストリップ２を酸化させ易い部所
であるが、ここに露点計３２を設けて露点を検出し、そ
の露点が所定値に維持されるように雰囲気ガスの供給を
制御することから炉内が恒常的に雰囲気ガス不足となる
ようなことなく、金属ストリップの酸化を一層確実に防
止する。In the vicinity of the inlet of the cooling zone 6, the gas temperature in the furnace is low, the dew point is likely to rise, and the temperature of the metal strip 2 is high, so that the metal strip 2 is easily oxidized. A dew point meter 32 is provided in the chamber to detect the dew point, and the supply of the atmospheric gas is controlled so that the dew point is maintained at a predetermined value. More reliably prevent the oxidation of.
【００１３】従って本発明では上記実施形態に示したよ
うに、炉内の雰囲気ガス濃度と露点の双方を検出するの
が望ましい。ただし、十分な安全率を見込むことによ
り、雰囲気ガス濃度と露点のいずれか一方を検出するだ
けでも、従来よりも雰囲気ガスの消費を節減しつつ金属
ストリップを光輝焼鈍し得る。Therefore, in the present invention, as shown in the above embodiment, it is desirable to detect both the atmospheric gas concentration and the dew point in the furnace. However, by considering a sufficient safety factor, the metal strip can be brightly annealed while the consumption of the atmospheric gas is reduced as compared with the conventional case, only by detecting either the atmospheric gas concentration or the dew point.
【００１４】[0014]
【発明の効果】このように本発明のストリップ連続熱処
理炉によれば、炉体内に常に必要十分な雰囲気ガスが無
駄なく供給され、外気の侵入と炉内雰囲気ガスの漏洩を
防いで金属ストリップの酸化を確実に防止できるととも
に、雰囲気ガスの消費が節減される有益な効果がある。As described above, according to the strip continuous heat treatment furnace of the present invention, the necessary and sufficient atmosphere gas is always supplied into the furnace body without waste, and the invasion of the outside air and the leakage of the atmosphere gas in the furnace are prevented and the metal strip of the metal strip is prevented. There is a beneficial effect that the oxidation can be surely prevented and the consumption of the atmospheric gas is reduced.
【図１】本発明に係るストリップ連続熱処理炉の実施形
態を示したガス供給路の系統図。FIG. 1 is a system diagram of a gas supply path showing an embodiment of a strip continuous heat treatment furnace according to the present invention.
【図２】本発明に係るストリップ連続熱処理炉にて雰囲
気ガス流量指示調節計に指示される操作量の変動を示し
たグラフ。FIG. 2 is a graph showing fluctuations in manipulated variables instructed by an atmospheric gas flow rate indicating controller in a strip continuous heat treatment furnace according to the present invention.
１ 炉体 ２ 金属ストリップ ５ 加熱・均熱帯 ６ 冷却帯 ７，８ シール室 ９，１０，１５，１６ シールロール １１，１７ 圧力計 １２，１８ 圧力指示調節計 １３，１９ 流量調節弁 ２０ 雰囲気ガス供給路 ２１，２２ 流量調節弁 ２３，２４ 流量指示調節計 ２５ 比率設定器 ２６，２７ 流量計 ３０ 雰囲気ガス再生装置 ３１ 濃度計 ３２ 露点計 ３３ 濃度指示調節計 ３４ 露点指示調節計 ３５ ハイセレクタ ３６ 最小操作量設定器 1 furnace body 2 metal strip 5 heating and soaking 6 cooling zones 7,8 sealed room 9,10,15,16 Seal roll 11,17 Pressure gauge 12,18 Pressure indicating controller 13, 19 Flow control valve 20 Atmosphere gas supply path 21,22 Flow control valve 23, 24 Flow rate indicating controller 25 Ratio setter 26,27 Flowmeter 30 Atmosphere gas regenerator 31 densitometer 32 Dew point meter 33 Concentration indicating controller 34 Dew point indicating controller 35 High Selector 36 Minimum manipulated variable setting device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ２１Ｄ 9/56 Ｃ２１Ｄ 9/56 １０１Ｊ Ｆ２７Ｄ 7/06 Ｆ２７Ｄ 7/06 Ｂ Ｃ Ｆターム(参考） 4K034 AA06 BA05 CA05 DB08 EA04 4K043 AA01 CB03 DA05 EA05 FA09 GA02 GA03 GA10 4K063 AA05 AA15 BA02 BA03 CA01 CA03 DA13 DA15 DA23 DA26 DA31 DA34 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) C21D 9/56 C21D 9/56 101J F27D 7/06 F27D 7/06 B C F term (reference) 4K034 AA06 BA05 CA05 DB08 EA04 4K043 AA01 CB03 DA05 EA05 FA09 GA02 GA03 GA10 4K063 AA05 AA15 BA02 BA03 CA01 CA03 DA13 DA15 DA23 DA26 DA31 DA34
Claims (3)
ルロールによって仕切されたシール室を設け、該各シー
ル室にシールガスを供給するとともに、炉体内に雰囲気
ガスを供給し、炉体内の入口側シール室付近から炉内ガ
スを強制的に吸引し該炉内ガスを再生して炉体内に循環
させる雰囲気ガス再生装置を備えたストリップ連続熱処
理炉において、雰囲気ガス再生装置の一次側の雰囲気ガ
ス濃度を検出する濃度計を設け、その濃度が所定値に維
持されるように前記雰囲気ガスの供給を制御することを
特徴としたストリップ連続熱処理炉。1. A seal chamber partitioned by a seal roll is provided at each of an inlet and an outlet of a metal strip, and a seal gas is supplied to each of the seal chambers and an atmosphere gas is supplied to the inlet of the furnace. In a strip continuous heat treatment furnace equipped with an atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity of the seal chamber and regenerating the furnace gas to circulate in the furnace body, the concentration of the atmosphere gas on the primary side of the atmosphere gas regenerator A continuous strip heat treatment furnace, characterized by comprising a densitometer for detecting, and controlling the supply of the atmospheric gas so that the concentration is maintained at a predetermined value.
ルロールによって仕切されたシール室を設け、該各シー
ル室にシールガスを供給するとともに、炉体内に雰囲気
ガスを供給し、炉体内の入口側シール室付近から炉内ガ
スを強制的に吸引し該炉内ガスを再生して炉体内に循環
させる雰囲気ガス再生装置を備えたストリップ連続熱処
理炉において、炉体内の冷却帯の入口付近に炉内ガスの
露点を検出する露点計を設け、その露点が所定値に維持
されるように前記雰囲気ガスの供給を制御することを特
徴としたストリップ連続熱処理炉。2. A seal chamber partitioned by a seal roll is provided at each of an inlet and an outlet of the metal strip, and a seal gas is supplied to each of the seal chambers and an atmospheric gas is supplied to the inlet of the furnace. In a strip continuous heat treatment furnace equipped with an atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity of the seal chamber to regenerate the furnace gas and circulate the gas in the furnace body, in the furnace body near the inlet of the cooling zone A strip continuous heat treatment furnace characterized in that a dew point meter for detecting the dew point of gas is provided, and the supply of the atmospheric gas is controlled so that the dew point is maintained at a predetermined value.
ルロールによって仕切されたシール室を設け、該各シー
ル室にシールガスを供給するとともに、炉体内に雰囲気
ガスを供給し、炉体内の入口側シール室付近から炉内ガ
スを強制的に吸引し該炉内ガスを再生して炉体内に循環
させる雰囲気ガス再生装置を備えたストリップ連続熱処
理炉において、雰囲気ガス再生装置の一次側の雰囲気ガ
ス濃度を検出する濃度計を設け、炉体内の冷却帯の入口
付近に炉内ガスの露点を検出する露点計を設け、その濃
度および露点が所定値に維持されるように雰囲気ガスの
供給を制御することを特徴としたストリップ連続熱処理
炉。3. A seal chamber partitioned by a seal roll is provided at each of an inlet and an outlet of the metal strip, and a seal gas is supplied to each of the seal chambers and an atmospheric gas is supplied to the inside of the furnace, and an inlet side of the furnace is provided. In a strip continuous heat treatment furnace equipped with an atmosphere gas regenerator for forcibly sucking in the furnace gas from the vicinity of the seal chamber and regenerating the furnace gas to circulate in the furnace body, the concentration of the atmosphere gas on the primary side of the atmosphere gas regenerator A dew point meter is installed near the inlet of the cooling zone inside the furnace to detect the dew point of the gas inside the furnace, and the supply of atmospheric gas is controlled so that the concentration and dew point are maintained at the specified values. A continuous strip heat treatment furnace characterized by that.
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|---|---|---|---|
| JP2001317329A JP2003129125A (en) | 2001-10-15 | 2001-10-15 | Continuous heat treatment furnace for strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001317329A JP2003129125A (en) | 2001-10-15 | 2001-10-15 | Continuous heat treatment furnace for strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003129125A true JP2003129125A (en) | 2003-05-08 |
Family
ID=19135220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001317329A Pending JP2003129125A (en) | 2001-10-15 | 2001-10-15 | Continuous heat treatment furnace for strip |
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