WO2014115190A1 - 連続熱処理炉の炉内雰囲気調整方法 - Google Patents
連続熱処理炉の炉内雰囲気調整方法 Download PDFInfo
- Publication number
- WO2014115190A1 WO2014115190A1 PCT/JP2013/000435 JP2013000435W WO2014115190A1 WO 2014115190 A1 WO2014115190 A1 WO 2014115190A1 JP 2013000435 W JP2013000435 W JP 2013000435W WO 2014115190 A1 WO2014115190 A1 WO 2014115190A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- furnace
- gas
- atmosphere
- temperature
- refiner
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
Definitions
- the present invention relates to a method for adjusting the in-furnace atmosphere of a continuous heat treatment furnace. More specifically, the present invention relates to a continuous heat treatment furnace for reducing the dew point of the in-furnace atmosphere gas of a continuous annealing furnace and advantageously producing a steel sheet with good plating adhesion. The present invention relates to a furnace atmosphere adjustment method.
- the dew point of the atmosphere gas in the furnace is to improve the chemical conversion of the steel sheets after heat treatment and the plating properties of high-tensile steel sheets. It is known that the target is ⁇ 45 ° C. or lower.
- the interior of the furnace when the furnace is started up is filled with an atmospheric atmosphere, and moisture in the atmosphere permeates into the furnace and the inside of the furnace wall refractory. Such moisture is gradually removed by operating the furnace, but it takes 10 to several hours for the inside of the furnace to reach the dew point range where the steel sheet can be manufactured, which is inefficient.
- gas that is part of the high-temperature atmosphere in the furnace is taken into a refiner that is a dehumidifying / deoxidizing device, and dehumidified / deoxidized.
- a refiner that is a dehumidifying / deoxidizing device, and dehumidified / deoxidized.
- the present invention provides a refiner after dehumidifying and deoxidizing a gas, which is part of the furnace atmosphere, into a refiner provided outside the furnace in order to reduce the dew point in the furnace atmosphere of a continuous annealing furnace.
- the dehumidified and deoxidized gas that has been discharged from the furnace is subjected to heat exchange with the gas taken into the refiner using a heat exchanger provided outside the furnace, and then the atmosphere inside the furnace using the furnace heat exchanger provided inside the furnace.
- the furnace atmosphere adjustment method for the continuous annealing furnace is characterized by blowing into the furnace again.
- the gas dehumidified and deoxidized by the refiner is heated by exchanging heat with the gas taken into the refiner by a heat exchanger provided outside the furnace, and then the furnace heat provided in the furnace. Since the heat was exchanged with the furnace atmosphere in the exchanger and the temperature was further raised and then blown into the furnace, the gas temperature in the furnace could be brought close to the furnace temperature without additional input of heat. Thus, it is possible to reduce the dew point of the furnace atmosphere while suppressing local decrease in the furnace temperature.
- FIG. 1 is a schematic diagram showing an embodiment of the present invention.
- FIG. 1 is a schematic view showing an embodiment of the present invention, in which 1 is a steel plate, 2 is an annealing furnace first heating zone, 3 is an annealing furnace second heating zone, 4 is an in-furnace roll, Is a take-out pipe, 6 is a blower, 7 is a heat exchanger, 8 is a refiner (dehumidification / deoxidation device), 9 is a heat exchanger connection pipe, 10 is a heat exchanger supply pipe in the furnace, and 11 is heat in the furnace An exchanger 12 is a blowing pipe.
- the second heating zone is used.
- a gas which is a part of the furnace atmosphere is taken out from 3 through a take-out pipe 5.
- the extracted gas is sent to the heat exchanger 7 by the blower 6, used as the high temperature side heat medium of the heat exchanger 7, and removed by heat exchange with the low temperature side heat medium of the heat exchanger 7. 8 is cooled to near normal temperature in the refiner 8 and dehumidified and deoxidized.
- the gas close to room temperature exiting the refiner 8 is taken as the low temperature side heat medium of the heat exchanger 7 via the heat exchanger connecting pipe 9 and is taken out as the high temperature side heat medium of the heat exchanger 7. It is heated by heat exchange with the gas, and becomes a gas whose temperature has been raised to an intermediate temperature between the two.
- the gas exiting the heat exchanger 7 is guided to the in-furnace heat exchanger 11 via the in-furnace heat exchanger supply pipe 10 and is used as a low-temperature heat medium for the in-furnace heat exchanger 11.
- the in-furnace heat exchanger 11 is installed in the first heating zone 2, and the high temperature side heat medium is the in-furnace atmosphere of the first heating zone 2. Therefore, the gas exiting the heat exchanger 7 is heated by heat exchange with the furnace atmosphere in the furnace heat exchanger 11 and becomes a gas heated to a temperature closer to the furnace atmosphere temperature, and the blow pipe 12 It is blown into the second heating zone 3 via.
- the location where the in-furnace heat exchanger 11 is installed as in this example, the location away from the blowing location (second heating zone 3 in this example) and the location where there is no problem even if the furnace temperature drops somewhat, that is, the furnace It is preferable from the viewpoint of better suppressing the local decrease in the furnace temperature to select a portion having sufficient heating capacity (first heating zone 2 in this example).
- the process gas of the refiner 8 is maintained under the condition that the load conditions of the combustion devices in the first heating zone 2 and the second heating zone 3 are kept constant and the furnace temperature is set to 800 ° C.
- the furnace temperature of the subsequent second heating zone 3 (abbreviated as “second heating zone furnace temperature after blowing”) was measured.
- the gas heated in the heat exchanger 7 was directly blown into the second heating zone 3, and other than this, the same as in the present invention example, Similar measurements were made. The results are shown in Table 1.
- the blowing gas temperature is much higher than that of the comparative example, and the furnace temperature of the second heating zone 3 after blowing is much higher than that of the comparative example, and the set furnace temperature (800 ° C.).
- the temperature drop from can be greatly reduced.
Abstract
Description
連続焼鈍炉において、炉立上げ時の炉内は大気雰囲気で充満されており、炉内および炉壁耐火物内部には、大気中の水分が浸透している。かかる水分は炉を運転することによって徐々に除去されていくが、炉内が鋼板製造可能な露点範囲になるには十数時間から数日の運転が必要であり、これは非効率的である。この理由としては、炉立上げ後、耐火物内部に浸透していた水分が徐々に炉内へ供給されることによって炉内の露点が下がるまでに時間を要するということが挙げられる。従来の炉内雰囲気調整方法の一つとして特許文献1のように炉内空間に直接雰囲気ガスを供給するとともに、炉壁耐火物の最外面側から炉内空間に向けて50℃~120℃の低温の雰囲気ガスを送給する方法が知られている。
つまり、従来、リファイナーで連続焼鈍炉の炉内低露点化を図る場合、熱量の追加投入無しでは炉内温度の局所的低下を防ぎ得ないという課題があった。
即ち、本発明は、連続焼鈍炉の炉内雰囲気の低露点化の為に前記炉内雰囲気の一部であるガスを炉外に設けたリファイナーに取り込んで脱湿・脱酸した後、前記リファイナーを出た脱湿・脱酸後のガスを、炉外に設けた熱交換器にて前記リファイナーに取り込むガスと熱交換させ、次いで、炉内に設けた炉内熱交換器にて炉内雰囲気と熱交換させた後、再び炉内へ吹き込むことを特徴とする連続焼鈍炉の炉内雰囲気調整方法である。
図示の様に、第1加熱帯2と第2加熱帯3とに分けられた連続焼鈍炉において、鋼板1が炉内ロール4にて連続通板されつつ連続焼鈍される場合、第2加熱帯3から取り出し配管5を介して炉内雰囲気の一部であるガスが取り出される。該取り出されたガスは送風機6により熱交換器7へ送られ、熱交換器7の高温側熱媒とされ、熱交換器7の低温側熱媒との熱交換により抜熱された後、リファイナー8へ導かれ、リファイナー8内で常温近くまで冷却され、脱湿・脱酸される。リファイナー8を出た常温に近いガスは、熱交換器繋ぎ込み配管9を経由して熱交換器7の低温側熱媒とされ、熱交換器7の高温側熱媒とされた前記取り出されたガスとの熱交換により加熱されて、両者の温度の中間程度の温度に昇温されたガスとなる。
2 焼鈍炉第1加熱帯
3 焼鈍炉第2加熱帯
4 炉内ロール
5 取り出し配管
6 送風機
7 熱交換器
8 脱湿・脱酸装置(リファイナー)
9 熱交換器繋ぎ込み配管
10 炉内熱交換器供給配管
11 炉内熱交換器
12 吹き込み配管
Claims (1)
- 連続焼鈍炉の炉内雰囲気の低露点化の為に前記炉内雰囲気の一部であるガスを炉外に設けたリファイナーに取り込んで脱湿・脱酸した後、前記リファイナーを出た脱湿・脱酸後のガスを、炉外に設けた熱交換器にて前記リファイナーに取り込むガスと熱交換させ、次いで、炉内に設けた炉内熱交換器にて炉内雰囲気と熱交換させた後、再び炉内へ吹き込むことを特徴とする連続焼鈍炉の炉内雰囲気調整方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13872371.3A EP2942407B1 (en) | 2013-01-28 | 2013-01-28 | Method for adjusting in-furnace atmosphere of continuous heat-treating furnace |
CN201380071511.6A CN104955966B (zh) | 2013-01-28 | 2013-01-28 | 连续热处理炉的炉内气氛调节方法 |
US14/763,901 US20150322539A1 (en) | 2013-01-28 | 2013-01-28 | Method for adjusting furnace atmosphere in continuous annealing furnace (as amended) |
PCT/JP2013/000435 WO2014115190A1 (ja) | 2013-01-28 | 2013-01-28 | 連続熱処理炉の炉内雰囲気調整方法 |
MX2015009510A MX2015009510A (es) | 2013-01-28 | 2013-01-28 | Metodo para ajustar una atmosfera de horno en un horno de recocido continuo. |
BR112015017639A BR112015017639A2 (pt) | 2013-01-28 | 2013-01-28 | método para ajustar a atmosfera interior de forno em um forno de têmpera contínuo |
KR1020157023056A KR101704503B1 (ko) | 2013-01-28 | 2013-01-28 | 연속 열처리로의 로 내 분위기 조정 방법 |
Applications Claiming Priority (1)
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PCT/JP2013/000435 WO2014115190A1 (ja) | 2013-01-28 | 2013-01-28 | 連続熱処理炉の炉内雰囲気調整方法 |
Publications (1)
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WO2014115190A1 true WO2014115190A1 (ja) | 2014-07-31 |
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PCT/JP2013/000435 WO2014115190A1 (ja) | 2013-01-28 | 2013-01-28 | 連続熱処理炉の炉内雰囲気調整方法 |
Country Status (7)
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US (1) | US20150322539A1 (ja) |
EP (1) | EP2942407B1 (ja) |
KR (1) | KR101704503B1 (ja) |
CN (1) | CN104955966B (ja) |
BR (1) | BR112015017639A2 (ja) |
MX (1) | MX2015009510A (ja) |
WO (1) | WO2014115190A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI698533B (zh) * | 2019-10-27 | 2020-07-11 | 協鋐機電有限公司 | 退火爐 |
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KR102122143B1 (ko) * | 2016-01-28 | 2020-06-11 | 제이에프이 스틸 가부시키가이샤 | 강판의 온도 제어 장치 및 온도 제어 방법 |
CN106282518B (zh) * | 2016-09-21 | 2018-10-26 | 北京科技大学 | 对轧钢加热炉用煤气进行冷冻脱湿的设备及方法 |
SE541228C2 (en) * | 2017-11-16 | 2019-05-07 | Swerim Ab | High temperature furnace |
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JPH04325632A (ja) * | 1991-04-26 | 1992-11-16 | Kawasaki Steel Corp | 連続焼鈍炉の炉内圧力維持方法及び装置 |
JPH07173526A (ja) | 1993-12-17 | 1995-07-11 | Nkk Corp | 雰囲気熱処理炉の操業方法 |
JP2000309826A (ja) * | 1999-04-22 | 2000-11-07 | Nippon Steel Weld Prod & Eng Co Ltd | 溶接用鋼ワイヤの連続焼鈍炉 |
JP2012111995A (ja) * | 2010-11-25 | 2012-06-14 | Jfe Steel Corp | 連続焼鈍炉の炉内雰囲気調整方法 |
JP2012126983A (ja) * | 2010-12-17 | 2012-07-05 | Jfe Steel Corp | 鋼帯の連続焼鈍方法、溶融亜鉛めっき方法 |
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JP2670134B2 (ja) * | 1989-03-08 | 1997-10-29 | 川崎製鉄株式会社 | ステンレス鋼帯の竪型連続光輝焼鈍炉における雰囲気ガス制御方法 |
TW436526B (en) * | 1998-07-28 | 2001-05-28 | Kawasaki Steel Co | Box annealing furnace, method for annealing metal sheet using the same, and annealed metal sheet |
FR2799828B1 (fr) * | 1999-09-09 | 2001-11-23 | Lorraine Laminage | Installation de controle de l'etancheite d'echangeurs de chaleur eau-gaz pour fours industriels |
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-
2013
- 2013-01-28 WO PCT/JP2013/000435 patent/WO2014115190A1/ja active Application Filing
- 2013-01-28 CN CN201380071511.6A patent/CN104955966B/zh active Active
- 2013-01-28 EP EP13872371.3A patent/EP2942407B1/en not_active Not-in-force
- 2013-01-28 KR KR1020157023056A patent/KR101704503B1/ko active IP Right Grant
- 2013-01-28 MX MX2015009510A patent/MX2015009510A/es unknown
- 2013-01-28 BR BR112015017639A patent/BR112015017639A2/pt not_active IP Right Cessation
- 2013-01-28 US US14/763,901 patent/US20150322539A1/en not_active Abandoned
Patent Citations (6)
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JPH04325632A (ja) * | 1991-04-26 | 1992-11-16 | Kawasaki Steel Corp | 連続焼鈍炉の炉内圧力維持方法及び装置 |
JPH07173526A (ja) | 1993-12-17 | 1995-07-11 | Nkk Corp | 雰囲気熱処理炉の操業方法 |
JP2000309826A (ja) * | 1999-04-22 | 2000-11-07 | Nippon Steel Weld Prod & Eng Co Ltd | 溶接用鋼ワイヤの連続焼鈍炉 |
JP2012111995A (ja) * | 2010-11-25 | 2012-06-14 | Jfe Steel Corp | 連続焼鈍炉の炉内雰囲気調整方法 |
JP2012126983A (ja) * | 2010-12-17 | 2012-07-05 | Jfe Steel Corp | 鋼帯の連続焼鈍方法、溶融亜鉛めっき方法 |
JP2013060610A (ja) * | 2011-09-12 | 2013-04-04 | Jfe Steel Corp | 連続熱処理炉の炉内雰囲気調整方法 |
Non-Patent Citations (1)
Title |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI698533B (zh) * | 2019-10-27 | 2020-07-11 | 協鋐機電有限公司 | 退火爐 |
Also Published As
Publication number | Publication date |
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KR20150110759A (ko) | 2015-10-02 |
US20150322539A1 (en) | 2015-11-12 |
MX2015009510A (es) | 2015-11-16 |
BR112015017639A2 (pt) | 2017-07-11 |
EP2942407A4 (en) | 2016-01-27 |
EP2942407B1 (en) | 2017-04-05 |
EP2942407A1 (en) | 2015-11-11 |
CN104955966B (zh) | 2017-09-26 |
CN104955966A (zh) | 2015-09-30 |
KR101704503B1 (ko) | 2017-02-08 |
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