EP1160342B1 - Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée - Google Patents
Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée Download PDFInfo
- Publication number
- EP1160342B1 EP1160342B1 EP01400953A EP01400953A EP1160342B1 EP 1160342 B1 EP1160342 B1 EP 1160342B1 EP 01400953 A EP01400953 A EP 01400953A EP 01400953 A EP01400953 A EP 01400953A EP 1160342 B1 EP1160342 B1 EP 1160342B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- atmosphere
- chamber
- installation
- rapid cooling
- zone
- 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.)
- Expired - Lifetime
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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
- 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
- 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
- C21D9/562—Details
- C21D9/565—Sealing arrangements
-
- 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
- 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
- C21D9/573—Continuous furnaces for strip or wire with cooling
Definitions
- the present invention relates to a method for securing a heat treatment chamber operating under controlled atmosphere. It aims more particularly a method of securing an enclosure of treatment operating under a high-grade atmosphere in hydrogen.
- it also relates to a heat treatment plant such as in particular speakers encountered in the field of vertical furnaces heat treatments or tape coatings continuous metal.
- Continuous heat treatment furnaces such as example the annealing or coating furnaces are composed one or more of the following zones: preheating, heating, maintaining, slow cooling and cooling fast.
- Each of these areas allows you to heat, maintain the temperature of the belt or cool it according to slopes heating and cooling and precise times defined by the metallurgical treatment cycle corresponding to the material to be treated.
- the increase in performance of the cooling zones requires the use of an atmosphere with a high hydrogen content, up to 100%, in order to achieve a large increase in exchange coefficient able to generate slopes of cooling of the order of 80 to 200 ° C / second or more for a 0.8 mm thick strip compatible with processing cycles to get at the nominal speed of the line.
- WO 99/50464 provides for balancing the pressures between the rapid cooling zone and a airlock compartment.
- a sheath can be provided between upstream and downstream parts of the rapid cooling zone. In such an installation, the flow rates of gas through sas are not well controlled.
- the method of securing a security heat treatment chamber operating under atmosphere of gas said chamber comprising a chamber of rapid cooling of a metal strip moving from an upstream chamber to a downstream chamber through a plurality of guide rollers, is characterized in that the band is confined within the enclosure of rapid cooling using at least one sheath pressure balancing device and a plurality of airlocks between the different rooms, in that we balance the pressures between the entrance and exit of the chamber of rapid cooling and in that one balances the pressures of gas atmospheres between the upstream chamber and the downstream chamber using at least one balancing sleeve of pressure, by controlling the flow rates of gas through said airlock by means of recycling conveying the atmosphere extracted from the rapid cooling chamber to a zone of rejection and / or to a dilution zone.
- An installation for the implementation of the process is characterized in that it comprises a balancing sleeve of pressure between the entrance and exit of the chamber of rapid cooling and means of recycling the atmosphere extracted from the rapid cooling chamber to a reject zone and / or to a dilution zone.
- this installation includes a vertical furnace continuous movement of a metal strip 1 running from a upstream chamber 2 to a downstream chamber 7 on rolls of guidance 3.
- a rapid cooling chamber is represented by 5, it is equipped with cooling devices by gas blowing on the tape according to the state of the art (no represented in the figure).
- the rapid cooling chamber 5 is separated from upstream and downstream chambers 7 by means of sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
- sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
- this is to confine a portion of tape that is intended to undergo a heat treatment, such as in particular a rapid cooling in a sheath 6.
- This sheath 6 is positioned within the rapid cooling chamber 5 and is filled with a controlled atmosphere with a high content of hydrogen.
- the sheath 6 located in the cooling chamber 5 also provides communication between rooms 2 and 7 to balance the pressures.
- the high hydrogen content of this leak can be diluted in the atmosphere of rooms 2 and 7 by behaving like a supplement of hydrogen for these rooms.
- the pressures and hydrogen contents of chambers 2, 5, 6 and 7 are controlled by sensors and a device regulating which adjusts the additions in atmosphere, so to maintain these pressures and the compositions of different atmospheres of different rooms to their values required.
- this installation differs from that shown in Figure 1 by the does that room 5 fast cooling and that is subjected to a gas-controlled atmosphere, incorporates into the once a strand up and a strand down the strip metallic.
- This configuration requires placing locks 4a and 4b in the same altitude so that the gas pressures upstream and downstream of the airlock, be identical (same mass of the column gas).
- the cooling equipment is spread over one or two strands or heating equipment - different or complementary cooling are implemented on the second strand of the band.
- a sheath 6 encompasses the containment chamber 5 conforming around this last an envelope, which is connected to both rooms 2 and 7. This sheath 6 thus allows the setting in communication atmospheres prevailing in these rooms and participates in the balancing of the pressures.
- Part 9 located substantially in the center of the installation and in the upper part of the sheath 8, is particularly reserved for the installation of blowing equipment on the band (ducts, control valves ). If the construction allow it, this part can be deleted, room 5 can then be performed as shown in Figure 3.
- this installation includes a vertical furnace continuous movement of a metal strip 1 running from a upstream chamber 2 to a downstream chamber 7 on rolls of guidance 3.
- a rapid cooling chamber is represented by 5, it is equipped with cooling devices by gas blowing on the tape according to the state of the art (no represented in the figure).
- the rapid cooling chamber 5 is separated from upstream and downstream chambers 7 by means of sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
- sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
- the airlock chambers 4a and 4b are arranged horizontally, respectively in upstream and downstream of the rapid cooling chamber 5, and allow to delimit in a direction substantially horizontal, a sheath 6 which puts in communication the adjacent rooms 2 and 7, thereby participating, as for the previous embodiments, to the balancing of the gas pressures prevailing in these chambers.
- the rising and falling strands of the band can to be united in a single room as represented on the figure 3.
- this installation shall include means enabling the securing the atmosphere of the cooling chamber high hydrogen content.
- this installation has three sheaths balancing the pressures between different points of the rooms of the treatment line.
- the high hydrogen content chamber 5 is equipped with a first balancing sleeve 8 in order to maintain the same pressure at the isolation locks 4a and 4b.
- a second balancing sleeve 10 makes it possible to maintain the pressures of at the same level.
- a third balancing sleeve 6 makes it possible to maintain upstream and downstream chamber pressures 2 and the same level, and allows the free movement of gas between these upstream and downstream zones without disturbing the airlock pressure and the high-grade chamber hydrogen 5.
- Atmosphere racking points may be carried out in each of the zones or in the pressure balancing sleeves, to allow the evacuation of a parasitic flow between two zones which could disrupt the atmosphere.
- the extraction of a flow of atmosphere from the chamber to high hydrogen content can be processed outside the line or be used directly in this line after nitrogen injection to recreate a low-grade atmosphere in hydrogen. This process makes it possible to limit important, the total consumption of the hydrogen line.
- this installation is similar in design to that represented in Figure 5 (it has three sheaths pressure balance), but differs in that it includes means for carrying out a recycling of the atmosphere extracted from the high-grade chamber hydrogen.
- First conduits 11a and 11b are connected to points extraction in a high hydrogen atmosphere, preferably located in the vicinity of locks 4a and 4b. of the extraction devices, for example fans 12a and 12b, convey said atmosphere and direct it through second conduits 16a and 16b, ie to a rejection zone 13a or 13b outside the facility, either to a dilution zone 14a, 14b, with a make-up gas mixture (including nitrogen), in order to obtain an atmosphere whose hydrogen content is lowered to a value corresponding to the hydrogen content of upstream 2 and downstream 7 zones, within of which these diluted gas injection points are made at 15a and 15b.
- a make-up gas mixture including nitrogen
- these gas recycling means can be adapted to collect high atmospheric flow hydrogen content at different points in chamber 5 or airlock 4a and 4b, in order to limit the exchanges of atmospheres between chamber 5 and adjacent chambers 2, 7.
- the airlock 4a and 4b and their pressure balancing sleeve 6 have been extended up to dial this equalizer room 17, the latter being, on the one hand, separated from the chamber high hydrogen content by airlock 19a and 19b, and on the other hand of the upstream chamber 2 by the airlock 18a and the downstream chamber 7 by the airlock 18b.
- a balancing sleeve of pressure 6 brings together these upstream and downstream chambers.
- the volume of the chamber 17 makes it possible to dampen the variations of pressure between the chamber 5 and the upstream and downstream chambers 2 7, and compensate for these pressure variations with the aid of a injection of atmosphere or extraction means.
- a seventh embodiment of an installation of heat treatment for carrying out the process object of the invention in the case where the chamber under atmosphere with a high concentration of hydrogen is located at the end of the line and where there is no other room downstream.
- This installation is overall similar to the sixth solution (see Figure 7) and differs from the fact that the downstream chamber is deleted, the output of band 21 is located in the enclosure 2 to keep it away from the strong zone hydrogen concentration.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Furnace Details (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0006708 | 2000-05-25 | ||
FR0006708A FR2809418B1 (fr) | 2000-05-25 | 2000-05-25 | Procede de mise en securisation d'une enceinte de traitement thermique fonctionnant sous atmosphere controlee |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1160342A1 EP1160342A1 (fr) | 2001-12-05 |
EP1160342B1 true EP1160342B1 (fr) | 2005-10-19 |
Family
ID=8850619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01400953A Expired - Lifetime EP1160342B1 (fr) | 2000-05-25 | 2001-04-12 | Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée |
Country Status (8)
Country | Link |
---|---|
US (1) | US6547898B2 (ko) |
EP (1) | EP1160342B1 (ko) |
JP (1) | JP4988096B2 (ko) |
KR (1) | KR100756589B1 (ko) |
CN (1) | CN1249256C (ko) |
DE (2) | DE60114085T2 (ko) |
ES (1) | ES2165342T3 (ko) |
FR (1) | FR2809418B1 (ko) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1014880A4 (fr) * | 2002-06-14 | 2004-05-04 | Ct Rech Metallurgiques Asbl | Gestion des flux de gaz dans une section reactive. |
FR2903122B1 (fr) * | 2006-06-30 | 2008-09-12 | Stein Heurtey | Dispositif de securisation d'un four equipe d'un chauffage et d'un refroidissement rapides fonctionnant sous atmosphere controlee. |
CN101354090B (zh) * | 2007-07-25 | 2012-08-22 | 阿旺泰克西班牙公司 | 用于液化气体调节组件的阀 |
FR3014447B1 (fr) | 2013-12-05 | 2016-02-05 | Fives Stein | Procede et installation de traitement thermique en continu d'une bande d'acier |
ES2749005T3 (es) * | 2014-03-03 | 2020-03-18 | Acciai Speciali Terni Spa | Aparato para el tratamiento de una tira de metal en una planta de recocido vertical |
KR101717960B1 (ko) | 2016-03-03 | 2017-03-20 | (주)나우이엔씨 | 강판의 연속 열처리로용 분위기 가스 실링 장치 |
BR112018070349B1 (pt) | 2016-04-05 | 2021-10-19 | Nippon Steel Corporation | Equipamento de resfriamento para um forno de recozimento contínuo |
KR102557715B1 (ko) | 2016-05-10 | 2023-07-20 | 유나이테드 스테이츠 스틸 코포레이션 | 고강도 철강 제품 및 이의 제조를 위한 소둔 공정 |
US11560606B2 (en) | 2016-05-10 | 2023-01-24 | United States Steel Corporation | Methods of producing continuously cast hot rolled high strength steel sheet products |
US11993823B2 (en) | 2016-05-10 | 2024-05-28 | United States Steel Corporation | High strength annealed steel products and annealing processes for making the same |
CN113825846A (zh) | 2019-05-07 | 2021-12-21 | 美国钢铁公司 | 生产连续铸造热轧高强度钢片产品的方法 |
BR112022001335A2 (pt) | 2019-08-07 | 2022-03-22 | United States Steel Corp | Produto de chapa de aço de têmpera e separação, e, método para produzir produto de chapa de aço de têmpera e separação |
BR112022003136A2 (pt) | 2019-08-19 | 2022-05-17 | United States Steel Corp | Produto de chapa de aço laminado de alta resistência, e, método para produzir um produto de chapa de aço laminado de alta resistência |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1987577A (en) * | 1931-11-25 | 1935-01-08 | Gen Electric | Apparatus for the thermic treatment of metal wires, filaments, bands, or the like |
US2534973A (en) * | 1949-03-02 | 1950-12-19 | Gen Electric | Cooling apparatus |
US3158507A (en) * | 1960-01-11 | 1964-11-24 | Continental Can Co | Floating roller seal |
DE3733884A1 (de) * | 1987-10-07 | 1989-04-27 | Linde Ag | Verfahren zum gluehen von metallteilen in durchlaufoefen |
JP2520507B2 (ja) * | 1990-07-12 | 1996-07-31 | 新日本製鐵株式会社 | ステンレス鋼帯の連続光輝焼鈍方法 |
FR2746112B1 (fr) * | 1996-03-13 | 1998-06-05 | Procede de traitement thermique en continu de bandes metalliques dans des atmospheres de nature differente | |
FR2769696B1 (fr) * | 1997-10-15 | 1999-12-31 | Stein Heurtey | Systeme de securite pour fours a refroidissement rapide de bandes metalliques |
JP4156065B2 (ja) * | 1998-02-24 | 2008-09-24 | 日新製鋼株式会社 | 金属帯用連続還元性雰囲気焼鈍装置および方法 |
JP3572983B2 (ja) * | 1998-03-26 | 2004-10-06 | Jfeスチール株式会社 | 連続熱処理炉ならびに連続熱処理炉における冷却方法 |
US6190164B1 (en) * | 1998-03-26 | 2001-02-20 | Kawasaki Steel Corporation | Continuous heat treating furnace and atmosphere control method and cooling method in continuous heat treating furnace |
-
2000
- 2000-05-25 FR FR0006708A patent/FR2809418B1/fr not_active Expired - Lifetime
-
2001
- 2001-04-12 ES ES01400953T patent/ES2165342T3/es not_active Expired - Lifetime
- 2001-04-12 EP EP01400953A patent/EP1160342B1/fr not_active Expired - Lifetime
- 2001-04-12 DE DE60114085T patent/DE60114085T2/de not_active Expired - Lifetime
- 2001-04-12 DE DE1160342T patent/DE1160342T1/de active Pending
- 2001-05-15 US US09/854,520 patent/US6547898B2/en not_active Expired - Lifetime
- 2001-05-24 KR KR1020010028595A patent/KR100756589B1/ko not_active IP Right Cessation
- 2001-05-25 CN CNB01118972XA patent/CN1249256C/zh not_active Expired - Fee Related
- 2001-05-25 JP JP2001156293A patent/JP4988096B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR20010107710A (ko) | 2001-12-07 |
DE60114085T2 (de) | 2006-07-13 |
CN1249256C (zh) | 2006-04-05 |
EP1160342A1 (fr) | 2001-12-05 |
ES2165342T3 (es) | 2006-03-01 |
FR2809418A1 (fr) | 2001-11-30 |
US6547898B2 (en) | 2003-04-15 |
ES2165342T1 (es) | 2002-03-16 |
JP2002003954A (ja) | 2002-01-09 |
US20010045024A1 (en) | 2001-11-29 |
JP4988096B2 (ja) | 2012-08-01 |
CN1327144A (zh) | 2001-12-19 |
DE1160342T1 (de) | 2002-05-23 |
DE60114085D1 (de) | 2005-11-24 |
KR100756589B1 (ko) | 2007-09-10 |
FR2809418B1 (fr) | 2003-05-16 |
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