EP2826570B1 - Systeme de pre-refroidissement avec reglage interne pilote - Google Patents

Systeme de pre-refroidissement avec reglage interne pilote Download PDF

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Publication number
EP2826570B1
EP2826570B1 EP13176682.6A EP13176682A EP2826570B1 EP 2826570 B1 EP2826570 B1 EP 2826570B1 EP 13176682 A EP13176682 A EP 13176682A EP 2826570 B1 EP2826570 B1 EP 2826570B1
Authority
EP
European Patent Office
Prior art keywords
section
flow rate
strip
cooling
equipment according
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.)
Active
Application number
EP13176682.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2826570A1 (fr
Inventor
Stéphane Langevin
M. Michel Dubois
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
John Cockerill SA
Original Assignee
Cockerill Maintenance and Ingenierie SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to ES13176682.6T priority Critical patent/ES2623037T3/es
Application filed by Cockerill Maintenance and Ingenierie SA filed Critical Cockerill Maintenance and Ingenierie SA
Priority to EP13176682.6A priority patent/EP2826570B1/fr
Priority to RU2015150163A priority patent/RU2655411C2/ru
Priority to CA2907632A priority patent/CA2907632C/fr
Priority to PCT/EP2014/056523 priority patent/WO2014177337A1/fr
Priority to EP14714277.2A priority patent/EP2991782A1/fr
Priority to CN201480024344.4A priority patent/CN105339103B/zh
Priority to BR112015026569-3A priority patent/BR112015026569B1/pt
Publication of EP2826570A1 publication Critical patent/EP2826570A1/fr
Priority to US14/926,950 priority patent/US10316399B2/en
Application granted granted Critical
Publication of EP2826570B1 publication Critical patent/EP2826570B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • 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
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0005—Cooling of furnaces the cooling medium being a gas
    • F27D2009/0008—Ways to inject gases against surfaces
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0072—Cooling of charges therein the cooling medium being a gas
    • F27D2009/0075—Cooling of charges therein the cooling medium being a gas in direct contact with the charge

Definitions

  • the present invention relates to a new device in the field of pre-cooling chambers by gaseous fluid atmosphere (air, nitrogen, etc.), so-called “pre-coolers”, for example used in the cooling towers of the cooling lines.
  • hot metal coating in particular of aluzinc type (such as Galvalume®, alloy Al-Zn, composed of 55% of aluminum) and aluminized, but also of galvanized coating (galvanized).
  • this device applies to all cooling chambers blowing a gas on a continuously moving metal strip and having a liquid coating and not fixed just to be applied.
  • aluzinc, alumina or other type coatings having been applied to a continuously moving metal strip must be solidified rapidly in order to avoid intermetallic growth and to obtain a correct microstructure in order to obtain good resistance to corrosion.
  • pre-coolers or cooling units called “air cooling chambers or chillers or air ducts” are used, made by technologies and constructions of slots, nozzles or many holes.
  • cooler For simplicity, we will speak here only of "cooler". A series of coolers is usually installed above coating application equipment to the first return roller of the cooling tower.
  • the first cooling device (s) is (are) usually movable to provide the space necessary for the maintenance of the coating application equipment.
  • This (s) first cooler (s) is generally slit technology.
  • Each chiller is generally equipped with a fan operating with a variable speed motor, in order to adjust its flow and its cooling air pressure depending on the strips and coatings to be treated.
  • the document US 2010/0200126 discloses a hot dipping production facility of galvanized / annealed steel sheets under optimum production conditions at any time despite rapid changes in the type of steel, cladding and other external factors.
  • the hot dipping production unit of galvanized / annealed steel sheets is equipped with a holding / cooling furnace for the treatment of steel sheets that have left a rapid heating furnace.
  • the holding / cooling furnace is configured to allow a change in the furnace ratio of the holding zone for quenching the steel sheet by quenching means at a holding temperature of 500 to 650 ° C and the cooling zone for cooling the steel sheet by spray nozzles at an average cooling rate of 5 ° C / second or more.
  • the document US 2001/0000377 discloses a method and a cooling system of a steel strip.
  • a high volume water mist cooler and a low volume water mist cooler are sequentially disposed along the direction in which the steel strip is moving.
  • the high volume water mist cooler vaporizes a high volume water mist on the surface of the steel strip to cool the latter and then, the low volume water mist cooler vaporizes a low fog.
  • volume of water on the surface of the steel strip to cool the steel strip thereby cooling the steel strip while suppressing the influence of the transition boiling, to prevent steel strip from having a portion non-uniform temperature.
  • the document US 2011/0018178 discloses a method for acting on the temperature of a blowing strip of a gas or a water / gas mixture, wherein a plurality of gas jets or a water / gas mixture, extending towards the surface of the strip and arranged in such a way that the impacts of the jets of gas or water / gas mixture on each surface of the strip are distributed at the nodes of a two-dimensional network, are sprayed on each face of the strip.
  • the impacts of the jets on one side are not compared to the impacts of the jets on the other side, and the jets of gas or water / gas mixture from tubular nozzles which are fed by at least one distribution chamber and s' extend at a certain distance from the distribution chamber so as to leave a free space for the flow of the gas or water / gas mixture back which is parallel to the longitudinal direction of the strip and perpendicular to the longitudinal direction of the strip .
  • the document US 2011/0030820 discloses a device for blowing gas on one side of a moving strip material, comprising at least one hollow box having a wall facing the relevant face of the strip material, is equipped with a plurality of blowing holes , for directing gas towards said face of the web material.
  • the hollow box is further equipped laterally, at least on one side thereof with reference to a median plane perpendicular to the plane of the strip, of a movable closure member the function of which is to selectively obscure some of the blowing orifices in order to adapt the width of the blast zone to the width of the strip material concerned.
  • the problem to be solved is the following (see figure 1 ).
  • the non-fixed coating of the strip 2 must be cooled and solidified by the two half-air coolers 11, 12, constituting the cooler 1.
  • the half-coolers 11, 12 are connected to a supply circuit 3 supplied with air by a fan 4 powered by a motor 5.
  • the flow rate of the cooling atmosphere is regulated by a speed variator 6 of the motor 5 of the fan 4 in order to cool the strip, and therefore its coating, more or less quickly depending on the desired quality.
  • a speed variator 6 of the motor 5 of the fan 4 in order to cool the strip, and therefore its coating, more or less quickly depending on the desired quality.
  • the speed and the flow rate of the cooling air must be limited since the coating is still completely in the liquid phase, otherwise a corrugated layer and / or appearance and microstructure not in compliance with quality standards.
  • the cooling must be important in order to avoid intermetallic growth and to obtain a correct microstructure.
  • the present invention aims to overcome the disadvantages of the prior art.
  • the invention aims at adjusting the cooling gas flow rate / pressure parameter for example in the (pre) -cooling boxes or in the upper coolers located at the outlet of the liquid coating application units, depending on the types of metal strips and coatings to be treated, in order to avoid the formation of defects in the coating.
  • the invention aims to divide into several sections a single cooler to obtain multiple flow / pressure regimes over the entire height of the cooler and preferably with a single fan.
  • a second aspect of the present invention relates to a method of cooling a continuously moving metal strip and having a liquid coating to be solidified, by means of the aforementioned installation, comprising a step of modifying the gas flow rate / pressure parameter. injected by means of the internal regulating devices so that the value said injected gas flow rate / pressure parameter is different in the first section from its value in the second section.
  • the injected gas flow rate / pressure parameter is modified so that the value of said injected gas flow rate / pressure parameter is lower in the first section relative to its value in the second section.
  • the flow rate of gas injected into the first section of the cooling installation is regulated to control the front and the rate of solidification of the coating still in the liquid phase at the inlet of the first section.
  • the flow rate of gas injected into the second section of the cooling installation is regulated to be greater than the primary flow rate and compatible with predetermined cooling slopes.
  • the present invention provides a solution to the technical problem stated above (see figure 2 ).
  • internal regulation systems or equipment 7, 8 are respectively installed in the two half-air coolers 11, 12. These control systems 7, 8 are intended to modify and adjust the flow rate of cooling fluid. between the lower parts (chiller inlet) and the upper parts (middle and outlet of the cooler) while maintaining flow rate uniformity per unit area for each section.
  • the care taken to make the equipment to not disturb the flow of gas is very important for a uniform and regular cooling of the coating to be solidified.
  • these separation systems 7, 8 may be duplicated if necessary to obtain different blowing speeds between respectively the inlet, the middle and the outlet of the cooler.
  • These regulation systems 7, 8 are advantageously actuated by pneumatic or electromechanical actuators 9, 10 with the possibility of remote remote control by the operator of the line. These regulation systems 7, 8 are preferably actuated jointly as a function of the air flow rate regulated by the variator 6 of the motor 5 of the fan 4 and the quality of the coating obtained.
  • the system according to the present invention offers the following advantages.
  • the flow of gas in the first part or section of the cooler said "primary" flow can be regulated, to control the front and rate of solidification of the coating always in the liquid phase at the inlet of the cooler and therefore to obtain the better quality of coating possible.
  • Primary internal flow control systems or equipment may be remotely controlled by the operator based on a quality / cooling slope criterion.
  • the "primary" blowing speed remains therefore under control compared to a completely manual system.
  • a pyrometer or other temperature measuring system, suitable for a moving belt, can be installed just after the control systems to control the cooling slope.
  • the second parts or sections of the two half-coolers 11, 12 can then have a "secondary" cooling rate much larger and compatible with the necessary cooling slopes, or with an increase in the cooling capacity of the cooler as a whole .
  • the cooling of the two half-coolers 11, 12 will therefore be adjusted and balanced between the variable speed controller 6 and the control systems 7, 8 delimiting the cooling inlet section. This gives a great flexibility to the cooler.
  • control systems 7, 8 also allow optimum adjustment of the coating quality between the two faces of the strip 2, since they must be able to be controlled individually if necessary.
  • the flow rate of the coolant per unit area is uniform in each of the sections and this, in particular transversely.
  • Another advantage is the flexibility of the system: it will be very easy to move the control system to another position in the (pre-) cooler if the starting position is not suitable or more. For example, three different positions of the control system can be provided.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating With Molten Metal (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Coating Apparatus (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP13176682.6A 2013-04-29 2013-07-16 Systeme de pre-refroidissement avec reglage interne pilote Active EP2826570B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP13176682.6A EP2826570B1 (fr) 2013-07-16 2013-07-16 Systeme de pre-refroidissement avec reglage interne pilote
ES13176682.6T ES2623037T3 (es) 2013-07-16 2013-07-16 Sistema de pre-refrigeración con regulación interna piloto
CA2907632A CA2907632C (fr) 2013-04-29 2014-04-01 Systeme de pre-refroidissement avec reglage interne pilote
PCT/EP2014/056523 WO2014177337A1 (fr) 2013-04-29 2014-04-01 Systeme de pre-refroidissement avec reglage interne pilote
RU2015150163A RU2655411C2 (ru) 2013-04-29 2014-04-01 Система предварительного охлаждения с управляемым внутренним регулированием
EP14714277.2A EP2991782A1 (fr) 2013-04-29 2014-04-01 Systeme de pre-refroidissement avec reglage interne pilote
CN201480024344.4A CN105339103B (zh) 2013-04-29 2014-04-01 具有受控内部调节装置的预冷却***
BR112015026569-3A BR112015026569B1 (pt) 2013-04-29 2014-04-01 Instalação para o resfriamento de uma tira metálica e método de resfriamento de uma tira metálica
US14/926,950 US10316399B2 (en) 2013-04-29 2015-10-29 Pre-cooling system having controlled internal adjustment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13176682.6A EP2826570B1 (fr) 2013-07-16 2013-07-16 Systeme de pre-refroidissement avec reglage interne pilote

Publications (2)

Publication Number Publication Date
EP2826570A1 EP2826570A1 (fr) 2015-01-21
EP2826570B1 true EP2826570B1 (fr) 2017-02-01

Family

ID=48795435

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13176682.6A Active EP2826570B1 (fr) 2013-04-29 2013-07-16 Systeme de pre-refroidissement avec reglage interne pilote
EP14714277.2A Withdrawn EP2991782A1 (fr) 2013-04-29 2014-04-01 Systeme de pre-refroidissement avec reglage interne pilote

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14714277.2A Withdrawn EP2991782A1 (fr) 2013-04-29 2014-04-01 Systeme de pre-refroidissement avec reglage interne pilote

Country Status (8)

Country Link
US (1) US10316399B2 (zh)
EP (2) EP2826570B1 (zh)
CN (1) CN105339103B (zh)
BR (1) BR112015026569B1 (zh)
CA (1) CA2907632C (zh)
ES (1) ES2623037T3 (zh)
RU (1) RU2655411C2 (zh)
WO (1) WO2014177337A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018109579A1 (de) * 2018-04-20 2019-10-24 Schwartz Gmbh Temperiervorrichtung zur partiellen Kühlung eines Bauteils
KR102180809B1 (ko) * 2018-12-17 2020-11-19 주식회사 포스코 금속소재 냉각장치
EP3827903A1 (en) * 2019-11-29 2021-06-02 Cockerill Maintenance & Ingenierie S.A. Device and method for manufacturing a coated metal strip with improved appearance

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1106562A1 (ru) * 1983-03-28 1984-08-07 Институт черной металлургии Устройство дл газожидкостной обработки проката
SU1497235A1 (ru) * 1986-08-05 1989-07-30 Донецкий научно-исследовательский институт черной металлургии Устройство дл охлаждени листового проката
JP2680162B2 (ja) * 1990-04-09 1997-11-19 川崎製鉄株式会社 金属ストリップのガス冷却装置
JPH11172401A (ja) 1997-12-05 1999-06-29 Mitsubishi Heavy Ind Ltd 帯材の冷却方法及び装置
FR2796139B1 (fr) * 1999-07-06 2001-11-09 Stein Heurtey Procede et dispositif de suppression de la vibration des bandes dans des zones de soufflage de gaz, notamment des zones de refroidissement
FR2802552B1 (fr) * 1999-12-17 2002-03-29 Stein Heurtey Procede et dispositif de reduction des plis de bande dans une zone de refroidissement rapide de ligne de traitement thermique
FR2897620B1 (fr) * 2006-02-21 2008-04-04 Stein Heurtey Procede et dispositif de refroidissement et de stabilisation de bande dans une ligne continue
CA2666056C (en) 2006-10-13 2012-01-03 Nippon Steel Corporation Production facility and production process for hot dip galvannealed steel plate
ATE494968T1 (de) 2008-03-14 2011-01-15 Arcelormittal France Verfahren und vorrichtung zum blasen von gas auf ein laufendes band
FR2931165B1 (fr) 2008-05-13 2010-11-26 Cmi Thermline Services Dispositif de soufflage de gaz sur une face d'un materiau en bande en defilement
CN101993995B (zh) * 2010-11-26 2012-05-30 首钢总公司 超高强度带钢水淬冷却方法及装置
CN202595217U (zh) * 2012-02-17 2012-12-12 宝山钢铁股份有限公司 一种带钢冷却***

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
RU2015150163A (ru) 2017-06-07
CN105339103B (zh) 2017-08-08
CA2907632C (fr) 2020-04-14
BR112015026569B1 (pt) 2022-07-26
EP2991782A1 (fr) 2016-03-09
ES2623037T3 (es) 2017-07-10
BR112015026569A2 (pt) 2017-07-25
RU2655411C2 (ru) 2018-05-28
US10316399B2 (en) 2019-06-11
EP2826570A1 (fr) 2015-01-21
CN105339103A (zh) 2016-02-17
RU2015150163A3 (zh) 2018-03-13
US20180105917A9 (en) 2018-04-19
US20160047027A1 (en) 2016-02-18
WO2014177337A1 (fr) 2014-11-06
CA2907632A1 (fr) 2014-11-06

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