WO2013108624A1 - 鋼帯の連続焼鈍炉及び連続焼鈍方法 - Google Patents

鋼帯の連続焼鈍炉及び連続焼鈍方法 Download PDF

Info

Publication number
WO2013108624A1
WO2013108624A1 PCT/JP2013/000192 JP2013000192W WO2013108624A1 WO 2013108624 A1 WO2013108624 A1 WO 2013108624A1 JP 2013000192 W JP2013000192 W JP 2013000192W WO 2013108624 A1 WO2013108624 A1 WO 2013108624A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
gas
zone
dew point
steel strip
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.)
Ceased
Application number
PCT/JP2013/000192
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
高橋　秀行
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.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to CN201380005671.0A priority Critical patent/CN104053796B/zh
Priority to KR1020147021987A priority patent/KR101644730B1/ko
Priority to EP13738991.2A priority patent/EP2806043B1/en
Priority to US14/372,649 priority patent/US9702020B2/en
Publication of WO2013108624A1 publication Critical patent/WO2013108624A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • C21D1/26—Methods of annealing
    • 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
    • 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
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
    • 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
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • 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
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224—Two or more thermal pretreatments
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • 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
    • 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
    • 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
    • F27D17/10—Arrangements for using waste heat
    • 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 continuous annealing furnace and a continuous annealing method for a steel strip.
  • a non-oxidizing gas such as an inert gas is supplied into the furnace as a replacement gas in the furnace atmosphere.
  • a method of substituting the atmosphere in the furnace with a non-oxidizing gas by exhausting the gas inside is widely performed.
  • high-tensile steel high-tensile material
  • Si is added to the steel, it may be possible to produce a high-tensile steel strip with good hole expansibility, and if it contains Si or Al, residual ⁇ is likely to form, and ductility is good.
  • the possibility that a simple steel strip can be provided is shown.
  • Si is the oxide film of SiO 2 on the steel strip surface is formed, the wettability of the steel strip and the molten plating metal significantly reduce, also, the SiO 2 oxide film during the alloying process and base iron Since it becomes a barrier for diffusion with the plated metal, the problem of hindering plating properties and alloying properties is particularly likely to occur.
  • Patent Document 1 discloses a method of controlling the soaking zone dew point to a high dew point of ⁇ 30 ° C. or higher from the latter stage of the heating zone.
  • this method can be expected to be effective to some extent and has the advantage of being industrially easy to control to a high dew point, it can be used to produce steel grades that are not desirable to operate at a high dew point (eg, Ti-IF steel).
  • a high dew point eg, Ti-IF steel.
  • this method makes the furnace atmosphere oxidizable, there is a problem that an oxide adheres to the roll in the furnace and a pick-up defect occurs if the control is wrong.
  • Another approach is to use a low oxygen potential.
  • Si, Mn, etc. are very easy to oxidize, in large continuous annealing furnaces such as those placed in CGL (continuous galvanizing line) / CAL (continuous annealing line), oxidation of Si, Mn, etc. is suppressed. It has been considered that it is very difficult to stably obtain an atmosphere having a low dew point of -40 ° C. or less which has an excellent effect of the action.
  • Patent Document 2 Techniques for efficiently obtaining an annealing atmosphere with a low dew point are disclosed in, for example, Patent Document 2 and Patent Document 3. These technologies are for relatively small-scale one-pass vertical furnaces and are not considered for application to multi-pass vertical furnaces such as CGL and CAL. The risk that the dew point cannot be lowered efficiently is very high.
  • the partition between the heating zone and the soaking zone is physically separated by providing a partition in addition to the part where the steel strip moves.
  • the heating zone and the soaking zone are not physically separated, but when there is no partition between the heating zone and the soaking zone, the flow of gas in the furnace is more freedom than when there is a partitioning. Due to the high degree and complexity of the flow, it is often difficult to reduce the dew point of the entire furnace.
  • the present invention sets the dew point of the furnace atmosphere to a steady operation prior to the steady operation in which the steel strip is continuously heat-treated or when the moisture concentration and / or oxygen concentration in the furnace atmosphere increases during the steady operation. It is an object of the present invention to provide a continuous annealing furnace for a steel strip that can be quickly reduced to a level suitable for the above. In addition, the present invention can stably obtain an atmosphere with a low dew point with less problems of pickup defects and furnace wall damage, and easily oxidizable elements such as Si and Mn in steel on the surface of the steel strip during annealing.
  • this invention provides the continuous annealing furnace arrange
  • an object of the present invention is to provide a continuous annealing method for a steel strip using the continuous annealing furnace.
  • this invention is a technique applied to the continuous annealing furnace in which the partition which physically separates the heating zone and the soaking zone of an annealing furnace does not exist, and the soaking zone and the cooling zone communicate with each other in the upper part of the furnace.
  • the inventors measured the dew point distribution in a large vertical furnace having multiple passes, and performed flow analysis based on the measurement.
  • steam H 2 O
  • the gas inside the furnace is sucked in from the upper part of the furnace and introduced into a refiner equipped with a deoxygenator and a dehumidifier to remove oxygen and moisture, lower the dew point, and return the gas with the lower dew point to a specific part in the furnace Therefore, it is possible to prevent the upper dew point of the furnace from becoming a high dew point and reduce the dew point of the furnace atmosphere to a predetermined level suitable for steady operation in a short time.
  • the means of the present invention for solving the above problems are as follows.
  • a heating zone that transports the steel strip in the vertical direction, a soaking zone, and a cooling zone are arranged in this order, and a connecting portion between the soaking zone and the cooling zone is arranged in the upper part of the furnace, and the heating zone and the soaking zone are between Is a partition wall, supplying atmospheric gas into the furnace from the outside of the furnace, discharging the furnace gas from the steel strip introduction part at the bottom of the heating zone, and sucking a part of the furnace gas and providing it outside the furnace
  • a vertical annealing furnace configured to be introduced into a refiner having a deoxygenation device and a dehumidification device to remove oxygen and moisture in the gas to lower the dew point, and to return the gas having the lowered dew point back into the furnace.
  • the gas suction port from the furnace to the refiner has a vertical distance of 6 m or less and a furnace length direction distance of 3 m or less from the lower part of the connecting part between the soaking zone and the cooling zone, and the steel strip introduction part at the lower part of the heating zone.
  • gas is discharged from the refiner into the furnace.
  • a continuous steel strip characterized in that the outlet is located in a region higher than the pass line at the junction between the soaking zone and the cooling zone, and in a region higher than a position 2 m below the center of the upper hearth roll of the heating zone.
  • the discharge width W0 of the gas outlet from the refiner arranged in the region higher than the position 2m below the center of the upper hearth roll of the heating zone into the furnace is the furnace width W of the heating zone and the soaking zone.
  • the discharge width W0 of the gas discharge port is the interval in the furnace length direction between the gas discharge port arranged at the position closest to the entry side of the heating zone and the gas discharge port arranged at the position closest to the exit side.
  • a dew point meter for measuring the dew point of the gas in the furnace in the vicinity of the gas suction port arranged in the heating zone and / or the soaking zone and arranging the gas suction port from the furnace to the refiner at a plurality of locations in the soaking zone.
  • a method of continuous annealing of a steel strip characterized by measuring a gas dew point and sucking in-furnace gas preferentially from a gas suction port arranged at a high dew point.
  • the moisture content and / or oxygen concentration in the furnace atmosphere is increased prior to or during the steady operation of continuously heat treating the steel strip.
  • the time to decrease the dew point of the furnace atmosphere to -30 ° C or lower which enables stable steel strip production, is shortened. Decline can be prevented.
  • the steel strip continuous hot dip galvanizing line is equipped with an annealing furnace upstream of the plating bath.
  • an annealing furnace a heating zone, a soaking zone, and a cooling zone are arranged in this order from upstream to downstream of the furnace.
  • a pretropical zone may be provided upstream of the heating zone.
  • the annealing furnace and the plating bath are connected via a snout, and the furnace from the heating zone to the snout is maintained in a reducing atmosphere gas or a non-oxidizing atmosphere.
  • a radiant tube (RT) the steel strip is heated indirectly.
  • the reducing atmosphere gas H 2 —N 2 gas is usually used, and is introduced into an appropriate place in the furnace from the heating zone to the snout.
  • the steel strip is heated and annealed to a specified temperature in the soaking zone, then cooled in the cooling zone, immersed in a plating bath via snout, hot dip galvanized, or further galvanized alloying treatment I do.
  • the furnace In the continuous hot dip galvanizing line (CGL), the furnace is connected to the plating bath via the snout, so the gas introduced into the furnace is from the entrance side of the furnace, except for unavoidable things such as furnace leaks.
  • the flow of the in-furnace gas is discharged from the downstream to the upstream of the furnace in the direction opposite to the steel strip traveling direction.
  • the specific gravity of water vapor (H 2 O) is lighter than that of N 2 gas, which occupies most of the atmosphere, the upper part of the vertical annealing furnace having multiple passes tends to have a high dew point.
  • Sources of water include furnace wall, steel strip, outside air inflow from the furnace inlet, inflow from cooling zone and snout, etc. May also be a source of water.
  • the influence of the dew point on the plating property is larger as the steel strip temperature is higher, and the influence is particularly great in the region of the steel strip temperature of 700 ° C. or higher where the reactivity with oxygen increases. Therefore, the latter half of the heating zone where the temperature rises and the dew point in the soaking zone will have a significant effect on the plating properties, but if there is no physical partition between the heating zone and the soaking zone (if there is no partition), Since the atmosphere of the heating zone and the soaking zone is not separated, it is necessary to efficiently reduce the dew point of the entire furnace region including the heating zone and the soaking zone.
  • the dew point it is necessary to lower the dew point to -40 ° C or below, which is excellent in suppressing the oxidation of Si, Mn, etc., but originally it is only necessary to lower the dew point only in the region where the steel plate temperature is high. In a furnace where the tropics and the soaking zone are not separated, it is difficult to lower the dew point of only the heating zone and a part of the soaking zone, so the dew point of the heating zone and the soaking zone must be lowered.
  • the lower dew point is advantageous from the viewpoint of plating properties, and it is preferable that the dew point can be lowered to -45 ° C or lower. More preferably, the temperature can be lowered to -50 ° C or lower.
  • the present invention introduces a part of the atmospheric gas in the furnace into a refiner having a deoxygenating device and a dehumidifying device provided outside the furnace, thereby reducing oxygen and moisture in the gas.
  • the dew point is reduced by removing the gas, and the gas with the lowered dew point is returned to the furnace.
  • the suction port of the furnace gas to be introduced into the refiner, the gas having the dew point returned from the refiner into the furnace Discharge ports are arranged as shown in 1) to 3) below.
  • a suction port for the gas to be introduced into the refiner is arranged at the location. This gas suction can prevent gas stagnation at the location, but the furnace pressure in the vicinity of the location may become negative, so a gas outlet that returns from the refiner is placed at the junction between the soaking zone and the cooling zone. .
  • the gas outlet is located on the furnace wall side above the pass line of the soaking zone-cooling zone connection, while the gas suction port is located at the bottom of the soaking zone and cooling zone connection.
  • the position of the gas suction port is preferably within 4 m, more preferably within 2 m from the cooling device (cooling nozzle) in the cooling zone. This is because if the distance to the cooling device becomes too long, the steel sheet is exposed to a gas with a high dew point for a long time before starting cooling, and Si, Mn, etc. may be concentrated on the steel sheet surface. Further, it is desirable that the gas suction port and the discharge port be arranged at a distance of 2 m or more.
  • the suction port is too close to the discharge port, the gas sucked from the suction port will have a lower ratio of high dew point gas (a higher ratio of low dew point gas from the refiner will be sucked), and the water removal efficiency in the furnace This is because of a decrease.
  • the gas inlet for the heating zone and the soaking zone should be placed in the place with the highest dew point.
  • the soaking zone will be Since the place with the highest dew point of fluctuates depending on operating conditions, it is not limited to a specific place. Therefore, it is preferable that the heating zone and the soaking zone gas suction ports are provided at a plurality of locations so that the gas in the furnace can be sucked from the locations, and the dew points of the furnace gas near the suction ports at the plurality of locations are further set.
  • the suction port for the gas in the furnace will be installed in the area excluding the area where the distance in the vertical direction is 6m or less and the distance in the furnace length direction is 3m or less from the steel strip introduction part at the bottom of the heating zone. If the gas suction port is placed in an area where the vertical distance is 6 m or less and the furnace length direction distance is 3 m or less from the steel strip introduction part at the bottom of the heating zone, the possibility of drawing the gas outside the furnace into the furnace increases, and the dew point This is because there is a risk of the increase.
  • the discharge width W0 of the gas discharge port arranged at the upper part of the heating zone is too narrow, the effect of eliminating gas stagnation at the upper part of the heating zone is reduced. It is preferable that W0 / W> 1/4 be satisfied with respect to the uniform tropical furnace width (total furnace width) W.
  • the discharge width W0 of the gas discharge port in the heating zone is the interval in the furnace length direction between the gas discharge port arranged on the most inlet side of the heating zone and the gas discharge port arranged on the most outlet side (see FIG. 2). ).
  • the present invention is based on such a viewpoint.
  • FIG. 1 shows an example of the configuration of a continuous hot dip galvanizing line for a steel strip provided with a vertical annealing furnace used in the practice of the present invention.
  • Fig. 1 1 is a steel strip
  • 2 is an annealing furnace
  • a heating zone 3 a soaking zone 4, and a cooling zone 5 are provided in this order in the direction of steel strip travel.
  • heating zone 3 and soaking zone 4 a plurality of upper hearth rolls 11a and lower hearth rolls 11b are arranged to form a plurality of paths for conveying steel strip 1 a plurality of times in the vertical direction, using RT as a heating means, 1 is heated indirectly.
  • 6 is a snout
  • 7 is a plating bath
  • 8 is a gas wiping nozzle
  • 9 is a heating device for alloying the plating
  • 10 is a refiner for deoxidizing and dehumidifying the atmospheric gas sucked from the furnace.
  • the connecting portion 13 between the soaking zone 4 and the cooling zone 5 is arranged in the upper furnace portion above the cooling zone 5, and the traveling direction of the steel strip 1 derived from the soaking zone 4 is changed downward in the connecting portion 13.
  • a roll is placed.
  • the outlet of the cooling zone 5 at the bottom of the connecting part is a throat. (Structure in which the cross-sectional area of the steel strip passing plate portion is reduced, the throat portion), and the seal roll 12 is disposed in the throat portion 14.
  • the cooling zone 5 is composed of a first cooling zone 5a and a second cooling zone 5b, and the first cooling zone 5a has one steel strip path.
  • 15 is an atmospheric gas supply system for supplying atmospheric gas from outside the furnace
  • 16 is a gas introduction pipe to the refiner
  • 17 is a gas outlet pipe from the refiner 10.
  • the suction port for the gas inside the furnace to be introduced into the refiner is where the gas flow path at the lower part of the connecting part 13 of the soaking zone 4 and the cooling zone 5 becomes narrower, for example, the throat part 14 and the steel strip at the lower part of the heating zone 3 are introduced. It is arranged in the heating zone 3 and / or the soaking zone 4 except for the area (see Fig. 2) where the vertical distance from the section is 6m or less and the furnace length direction distance is 3m or less.
  • the suction ports arranged in the heating zone 3 and / or the soaking zone 4 are preferably arranged at a plurality of locations. When the seal roll is disposed in the throat portion 14, the gas flow path is further narrowed at the location, so it is more desirable to arrange a gas suction port at or near the location.
  • the gas outlets for discharging the gas whose dew point has been lowered by the refiner into the furnace are arranged in the junction 13 between the soaking zone 4 and the cooling zone 5 and the heating zone 3.
  • the gas discharge ports arranged at the connecting portion 13 between the soaking zone 4 and the cooling zone 5 are arranged at a position higher than the pass line.
  • the gas outlets arranged in the heating zone 3 are arranged in a region higher than a position 2 m below the center of the upper hearth roll of the heating zone 3 in the vertical direction. It is preferable to arrange the gas outlets of the heating zone at a plurality of locations.
  • FIG. 2 shows an arrangement example of the gas suction port to the refiner 10 and the gas discharge port from the refiner.
  • 22a to 22e are gas suction ports to the refiner
  • 23a to 23e are gas discharge ports from the refiner
  • 24 is a dew point detector.
  • the furnace width of the heating zone is 12m
  • the width of the soaking zone is 4m
  • the width of the heating zone and soaking zone is 16m.
  • the gas suction port to the refiner is ⁇ 200mm, one piece (22e) alone at the throat part at the bottom of the connecting part 13 of the soaking zone 3 and the cooling zone 4, and 1m below the hearth roll center in the soaking zone, Furnace at 1/2 the furnace height (center in the height direction), 1m above the center of the lower tropical hearth roll and at the center of the heating zone (at the center of the furnace height at the center of the furnace length)
  • a total of four sets of suction ports (22a to 22d) are arranged with two suction ports arranged at intervals of 1 m in the longitudinal direction as a set.
  • the gas outlet from the refiner is ⁇ 50mm, 1m higher than the pass line of the exit side furnace wall at the junction of the soaking zone and the cooling zone, and 1 piece (23e), 1m from the ceiling wall.
  • Four locations (23a to 23d) are arranged in the furnace length direction at intervals of 2m, starting from a position 1m from the inlet side furnace wall of the heating zone, 1m below the center of the hearth roll.
  • the dew point detection unit 24 of the dew point meter that detects the dew point of the gas in the furnace is the connection between the soaking zone and the cooling zone, the middle between the two suction ports of each set arranged in the soaking zone and the heating zone, and the entrance of the heating zone Arranged between the third and fourth discharge ports from the side furnace wall (intermediate between the discharge ports 23c and 23d).
  • the atmospheric gas suction ports are installed at multiple locations in the heating zone and the soaking zone for the following reasons. Regardless of whether or not there is a partition between the heating zone and the soaking zone, the dew point distribution in the furnace will vary greatly depending on the conditions in the furnace (for example, the RT and the breakage of the furnace seal). Since the gas flow inside is limited by the partition wall, it is easy to define the location of the gas discharge port returning from the refiner and the gas suction port to the refiner, which are necessary for efficiently reducing the dew point. On the other hand, when there is no partition wall, the gas flow in the furnace becomes complicated, so it is necessary to change the refiner suction port and discharge port according to the dew point situation.
  • the suction port is not arranged in a place with a high dew point, moisture in the furnace cannot be removed efficiently, the desired dew point cannot be reached, and the furnace equipment becomes long.
  • the atmospheric gas sucked from the gas suction port can be introduced into the refiner via the gas introduction pipes 16a to 16e and 16 to the refiner. Adjustment and stop of the suction amount of atmospheric gas in the furnace from each suction port can be individually controlled by a valve (not shown) and a flow meter (not shown) provided in the middle of each gas introduction pipe 16a to 16e.
  • the gas whose dew point has been lowered by removing oxygen and moisture with the refiner can be discharged into the furnace from the discharge ports 23a to 23e via the gas outlet pipes 17 and 17a to 17e from the refiner. Adjustment and stop of the amount of gas discharged from each discharge port into the furnace can be individually controlled by a valve (not shown) and a flow meter (not shown) provided in the middle of each gas outlet pipe 17a to 17e.
  • FIG. 3 shows a configuration example of the refiner 10.
  • 30 is a heat exchanger
  • 31 is a cooler
  • 32 is a filter
  • 33 is a blower
  • 34 is a deoxygenator
  • 35 and 36 are dehumidifiers
  • 46 and 51 are switching valves
  • 40 to 45, 47 to 50, 52 and 53 are valves.
  • the deoxygenation device 34 is a deoxygenation device using a palladium catalyst.
  • the dehumidifiers 35 and 36 are dehumidifiers using a synthetic zeolite catalyst. Two dehumidifiers 35 and 36 are arranged in parallel so that they can be operated continuously.
  • the steel strip 1 When galvanizing after annealing the steel strip in this continuous hot dip galvanizing line, the steel strip 1 is transported through the heating zone 3 and the soaking zone 4 and heated to a predetermined temperature (eg, about 800 ° C.) for annealing. After that, it is cooled to a predetermined temperature in the cooling zone 5. After cooling, it is immersed in a plating bath 7 through a snout 6 and hot dip galvanized, and after being lifted from the plating bath, the plating adhesion amount is adjusted to a desired adhesion amount by a gas wiping nozzle 8 installed on the plating bath. After adjusting the plating adhesion amount as necessary, galvanizing alloying treatment is performed using the heating equipment 9 disposed above the gas wiping nozzle 8.
  • a predetermined temperature eg, about 800 ° C.
  • the atmospheric gas is supplied from the atmospheric gas supply system 15 into the furnace.
  • the atmospheric gas species, composition, and gas supply method may be ordinary methods. Usually, H 2 -N 2 gas is used and supplied to each part in the furnace after heating zone 3, soaking zone 4 and cooling zone 5.
  • the blower 33 sucks the atmospheric gas in the throat section 14 at the bottom of the connecting section 13 of the heating zone 3, soaking zone 4, soaking zone 4 and cooling zone 5 from the gas suction ports 22a to 22e to the refiner. Then, after passing through the heat exchanger 30 and the cooler 31 in order to cool the atmospheric gas to about 40 ° C. or less and purifying the gas with the filter 32, the deoxygenating device 34 deoxygenates the atmospheric gas, dehumidifying device 35 or 36. Dehumidify the atmospheric gas with, and lower the dew point to about -60 ° C. Switching between the dehumidifying devices 35 and 36 is performed by operating the switching valves 46 and 51.
  • the gas with the dew point lowered is passed through the heat exchanger 30, the gas is discharged from the gas outlets 23 a to 23 e from the refiner to the connecting portion 13 of the heating zone 3, the soaking zone 4 and the cooling zone 5.
  • the temperature of the gas discharged into the furnace can be increased.
  • the gas in the furnace is constantly sucked from the gas suction port 22e of the throat part 14 at the lower part of the connecting part 13 of the soaking zone 4 and the cooling zone 5.
  • the gas suction ports 22a to 22d located in the heating zone 3 and the soaking zone 4 can be sucked from all the suction ports at the same time, or from two or more gas suction ports, or measured with a dew point meter. From the dew point data, one gas suction port with a high dew point can be selected and the gas at that point can be preferentially sucked.
  • Gas discharge (gas discharge from the discharge port 23e) to the junction 13 between the soaking zone 4 and the cooling zone 5 is not essential. Gas discharge to the heating zone 3 is essential.
  • the gas can be discharged from one of the gas discharge ports 23a to 23d from the refiner or can be discharged from a plurality of locations. When discharging from a plurality of locations, it is preferable to discharge the gas discharge port so that the discharge width W0 satisfies W0 / W> 1/4 with respect to the heating zone and the soaking zone furnace width W.
  • the atmospheric dew point of the soaking zone and the soaking zone and the cooling zone connection can be lowered to -40 ° C or lower, or further to -45 ° C or lower. Furthermore, it prevents atmospheric gas stagnation in the upper, middle, and lower parts of the furnace in the latter half of the heating zone. Or it can also fall below -50 degreeC.
  • dew point meters that measure the dew point of the furnace gas are installed at multiple locations to detect the dew point, and the target dew point is obtained by sucking the furnace gas preferentially from the suction port at a location with a high dew point. It is possible to reduce the flow rate of refiner introduced gas.
  • a preheating furnace is not arranged upstream of the heating zone, but a preheating furnace may be provided.
  • this invention is applicable also to the continuous annealing line (CAL) which continuously anneals a steel strip.
  • CAL continuous annealing line
  • concentration and / or oxygen concentration it is possible to shorten the time during which the dew point of the furnace atmosphere is lowered to ⁇ 30 ° C. or lower, at which steel strip production can be stably performed, and to prevent a decrease in productivity.
  • a dew point measurement test was conducted with the ART type (all radiant type) CGL shown in Fig. 1 (annealing furnace length 400m, heating zone, soaking zone furnace height 23m, heating zone furnace width 12m, soaking zone furnace width 4m). .
  • the atmospheric gas supply points from outside the furnace are 1m high from the hearth on the drive side in the soaking zone, and three in each along the length of the furnace at 10m, and the heating zone is at a height from the hearth on the drive side. There are a total of 16 locations with 8 locations each in the furnace length direction at 1 m and 10 m.
  • the dew point of the atmospheric gas supplied is -60 ° C.
  • the gas suction port to the refiner and the gas discharge port from the refiner were installed as shown in FIG. That is, the gas suction port is located at the throat part at the lower part of the connecting part between the soaking zone and the cooling zone, and 1 m below the soothing center of the upper hearth roll. 1m above the center of the tropical lower hearth roll and the center of the heating zone (center of the furnace height and the center of the furnace length direction), the heating zone and soaking zone can be selected from the dew point data.
  • the gas outlet from the refiner is 1 m from the exit wall and ceiling wall of the junction between the soaking zone and the cooling zone, and 1 m from the center of the upper hearth roll in the heating zone, and 1 m from the entrance wall.
  • the suction port was ⁇ 200mm and the distance between the two parts other than the communication part was 1m, the communication part was single, the discharge port was ⁇ 50mm, the communication part was single, and the upper part of the heating zone was a distance of 2m.
  • the distance between the discharge port arranged at the connecting part between the soaking zone and the cooling zone and the suction port arranged at the throat part below the connecting part is 4 m.
  • the refiner used synthetic zeolite for the dehumidifier and a palladium catalyst for the deoxygenator.
  • a steel strip with a thickness of 0.8 to 1.2 mm and a width of 950 to 1000 mm was used, and the test was conducted under the same conditions as much as possible at an annealing temperature of 800 ° C. and a plate speed of 100 to 120 mpm.
  • Table 1 shows the alloy components of the steel strip.
  • H 2 -N 2 gas H 2 concentration 10 vol%, dew point -60 ° C
  • base the dew point (initial dew point) of the atmosphere when the refiner is not used (-34 ° C to -36 ° C) °C)
  • the dew point after use of the refiner was investigated.
  • the dew point was measured at the center of the heating zone and the soaking zone, and the height was measured at the same height as the gas inlet or the gas outlet.
  • a dew point detector (dew point detector 25 in Fig. 2) was added to the center of the heating zone in the furnace length direction and 1m above the center of the lower hearth roll, and the dew point at the bottom of the heating zone was also measured. .
  • Table 2 shows the dew point reduction effect by the initial dew point and refiner suction position of each part of the furnace.
  • the base conditions were divided into four parts, A to D, depending on where the dew point was the highest except at the bottom of the heating zone.
  • the dew point of ⁇ 40 ° C. or lower is obtained in the example of the present invention.
  • the discharge width of the gas discharged from the refiner into the heating zone is more than 1/4 of the heating zone and the soaking zone furnace width, and the gas is discharged to the connecting portion between the soaking zone and the cooling zone. Things have a lower dew point.
  • the dew point is -50 ° C. It has decreased to the following.
  • the condition of the conventional method is that the atmospheric gas supplied to the furnace is composed of H 2 : 8 vol%, the balance is N 2 and inevitable impurities (dew point -60 ° C) supplied gas amount: 300 Nm 3 / hr, the amount of gas supplied to the soaking zone: 100 Nm 3 / hr, the amount of gas supplied to the heating zone: at 450 Nm 3 / hr, thickness 0.8 ⁇ 1.2 mm, the range of Itahaba 950 ⁇ 1000 mm Steel alloy (alloy composition of steel is the same as in Table 1), annealing temperature is 800 ° C, plate feed speed is 100-120mpm.
  • the conditions of the method of the present invention were the same conditions as described above. Further, a refiner was used, and the initial dew point was close to the A base condition of Example 1 (the highest tropical dew point was the highest). The test was performed under the conditions of No. 2 in Table 2 of Example 1 (A optimum condition). The survey results are shown in FIG. The dew point is the dew point in the upper part of the soaking zone.
  • the dew point can be lowered to -30 ° C or less in 6 hours, can be lowered to -40 ° C or less in 9 hours, and can be lowered to -50 ° C or less in 14 hours.
  • the moisture concentration and / or the oxygen concentration in the furnace atmosphere rises before or during the steady operation of continuously heat-treating the steel strip.
  • the moisture concentration and / or the oxygen concentration in the furnace atmosphere can be reduced, and the dew point of the furnace atmosphere can be lowered in a short time to ⁇ 30 ° C. or lower, at which steel strip production can be stably performed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
PCT/JP2013/000192 2012-01-17 2013-01-17 鋼帯の連続焼鈍炉及び連続焼鈍方法 Ceased WO2013108624A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201380005671.0A CN104053796B (zh) 2012-01-17 2013-01-17 钢带的连续退火炉及连续退火方法
KR1020147021987A KR101644730B1 (ko) 2012-01-17 2013-01-17 강대의 연속 어닐링로 및 연속 어닐링 방법
EP13738991.2A EP2806043B1 (en) 2012-01-17 2013-01-17 Continuous annealing furnace and continuous annealing method for steel strips
US14/372,649 US9702020B2 (en) 2012-01-17 2013-01-17 Continuous annealing furnace and continuous annealing method for steel strips

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012006994A JP5505430B2 (ja) 2012-01-17 2012-01-17 鋼帯の連続焼鈍炉及び連続焼鈍方法
JP2012-006994 2012-01-17

Publications (1)

Publication Number Publication Date
WO2013108624A1 true WO2013108624A1 (ja) 2013-07-25

Family

ID=48799055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/000192 Ceased WO2013108624A1 (ja) 2012-01-17 2013-01-17 鋼帯の連続焼鈍炉及び連続焼鈍方法

Country Status (7)

Country Link
US (1) US9702020B2 (https=)
EP (1) EP2806043B1 (https=)
JP (1) JP5505430B2 (https=)
KR (1) KR101644730B1 (https=)
CN (2) CN105671301B (https=)
TW (1) TWI488975B (https=)
WO (1) WO2013108624A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015068369A1 (ja) * 2013-11-07 2015-05-14 Ｊｆｅスチール株式会社 連続焼鈍設備および連続焼鈍方法
CN112609059A (zh) * 2020-12-10 2021-04-06 浙江海亮股份有限公司 链式退火炉及管材传送控制方法

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5982905B2 (ja) 2012-03-19 2016-08-31 Ｊｆｅスチール株式会社 高強度溶融亜鉛めっき鋼板の製造方法
US9713823B2 (en) * 2012-04-06 2017-07-25 Jfe Steel Corporation Continuous galvanizing line having an annealing furnace
US10233526B2 (en) * 2012-12-04 2019-03-19 Jfe Steel Corporation Facility having a continuous annealing furnace and a galvanization bath and method for continuously manufacturing hot-dip galvanized steel sheet
US10174411B2 (en) 2013-03-04 2019-01-08 Jfe Steel Corporation High-strength steel sheet and production method therefor and high-strength galvanized steel sheet and production method therefor (as amended)
CN103555925B (zh) * 2013-11-08 2015-04-22 中冶南方(武汉)威仕工业炉有限公司 一种用于钛板及钢带退火的立式连续退火炉
FR3014447B1 (fr) * 2013-12-05 2016-02-05 Fives Stein Procede et installation de traitement thermique en continu d'une bande d'acier
JP5884196B2 (ja) * 2014-02-18 2016-03-15 Ｊｆｅスチール株式会社 高強度溶融亜鉛めっき鋼板の製造方法
KR101639155B1 (ko) * 2015-03-25 2016-07-13 현대제철 주식회사 연속 열처리로의 이슬점 측정 장치 및 그 방법
WO2016156125A1 (en) * 2015-04-02 2016-10-06 Cockerill Maintenance & Ingénierie S.A. Method and device for reaction control
JP6237937B2 (ja) * 2016-03-11 2017-11-29 Ｊｆｅスチール株式会社 高強度溶融亜鉛めっき鋼板の製造方法
WO2017182833A1 (en) * 2016-04-19 2017-10-26 Arcelormittal Method for producing a metallic coated steel sheet
KR102231412B1 (ko) * 2016-10-25 2021-03-23 제이에프이 스틸 가부시키가이샤 고강도 용융 아연 도금 강판의 제조 방법
EP3730662B1 (en) * 2017-12-22 2021-11-17 JFE Steel Corporation Method for producing hot-dip galvanized steel sheet and continuous hot-dip galvanizing apparatus
EP3511430A1 (de) * 2018-01-12 2019-07-17 SMS Group GmbH Verfahren für eine kontinuierliche wärmebehandlung eines stahlbands, und anlage zum schmelztauchbeschichten eines stahlbands
US11713501B2 (en) * 2019-11-15 2023-08-01 Roteq Machinery Inc. Machine line and method of annealing multiple individual aluminum and copper wires in tandem with a stranding machine for continuous operation
JP2021091960A (ja) * 2019-12-09 2021-06-17 中外炉工業株式会社 熱処理装置
DE102021201616A1 (de) * 2020-05-29 2021-12-02 Sms Group Gmbh Verfahren zum rekristallisierenden Glühen eines nicht-kornorientierten Elektrobandes
CN114317942B (zh) * 2020-09-28 2024-05-10 上海梅山钢铁股份有限公司 一种热镀锌卧式炉炉内漏水判断及处理方法
CN112251698B (zh) * 2020-11-06 2022-11-18 河北海洪新材料有限公司 一种热镀锌带钢生产余热利用装置
IT202200021987A1 (it) * 2022-10-25 2024-04-25 Danieli Off Mecc Sistema di rivestimento per rivestire un nastro metallico con uno strato di metallo fuso

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08109417A (ja) * 1994-10-12 1996-04-30 Nippon Steel Corp 連続焼鈍炉の雰囲気ガス置換法
JP2567130B2 (ja) 1990-05-07 1996-12-25 日本冶金工業株式会社 光輝焼鈍炉
JP2567140B2 (ja) 1990-09-04 1996-12-25 日本冶金工業株式会社 光輝焼鈍炉
JP2003129125A (ja) * 2001-10-15 2003-05-08 Daido Steel Co Ltd ストリップ連続熱処理炉
WO2007043273A1 (ja) 2005-10-14 2007-04-19 Nippon Steel Corporation Ｓｉを含有する鋼板の連続焼鈍溶融めっき方法及び連続焼鈍溶融めっき装置
WO2012081719A1 (ja) * 2010-12-17 2012-06-21 Ｊｆｅスチール株式会社 鋼帯の連続焼鈍方法、及び、溶融亜鉛めっき方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133329A (ja) 1983-01-19 1984-07-31 Nippon Steel Corp 連続焼鈍炉における雰囲気ガス置換法
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
JPH0567140A (ja) 1991-09-09 1993-03-19 Kobe Nippon Denki Software Kk 機械翻訳装置
JPH0567130A (ja) 1991-09-09 1993-03-19 Hokkaido Oki Denki Syst:Kk 承認印付き文書フアイル化装置
JP3176843B2 (ja) * 1996-06-05 2001-06-18 川崎製鉄株式会社 溶融亜鉛めっき鋼板の製造方法および製造設備
JPH09324210A (ja) * 1996-06-07 1997-12-16 Kawasaki Steel Corp 溶融亜鉛めっき鋼板の製造方法および製造設備
SE515593C2 (sv) * 1999-03-01 2001-09-03 Avesta Sheffield Ab Apparat för värmning av ett metallband
JP2000290762A (ja) * 1999-04-07 2000-10-17 Kawasaki Steel Corp 溶融めっき鋼板の製造方法
CN100471980C (zh) * 2002-09-13 2009-03-25 杰富意钢铁株式会社 热镀金属带的制造方法和制造装置
JP4192051B2 (ja) * 2003-08-19 2008-12-03 新日本製鐵株式会社 高強度合金化溶融亜鉛めっき鋼板の製造方法と製造設備
CN201809415U (zh) * 2010-08-31 2011-04-27 吕军 连续退火炉炉内气体清洁度检测装置
JP5565485B1 (ja) * 2013-02-25 2014-08-06 Ｊｆｅスチール株式会社 鋼帯の連続焼鈍装置および連続溶融亜鉛めっき装置
JP5884748B2 (ja) * 2013-02-25 2016-03-15 Ｊｆｅスチール株式会社 鋼帯の連続焼鈍装置および連続溶融亜鉛めっき装置
KR101907476B1 (ko) * 2013-11-07 2018-10-12 제이에프이 스틸 가부시키가이샤 연속 어닐링 설비 및 연속 어닐링 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2567130B2 (ja) 1990-05-07 1996-12-25 日本冶金工業株式会社 光輝焼鈍炉
JP2567140B2 (ja) 1990-09-04 1996-12-25 日本冶金工業株式会社 光輝焼鈍炉
JPH08109417A (ja) * 1994-10-12 1996-04-30 Nippon Steel Corp 連続焼鈍炉の雰囲気ガス置換法
JP2003129125A (ja) * 2001-10-15 2003-05-08 Daido Steel Co Ltd ストリップ連続熱処理炉
WO2007043273A1 (ja) 2005-10-14 2007-04-19 Nippon Steel Corporation Ｓｉを含有する鋼板の連続焼鈍溶融めっき方法及び連続焼鈍溶融めっき装置
WO2012081719A1 (ja) * 2010-12-17 2012-06-21 Ｊｆｅスチール株式会社 鋼帯の連続焼鈍方法、及び、溶融亜鉛めっき方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015068369A1 (ja) * 2013-11-07 2015-05-14 Ｊｆｅスチール株式会社 連続焼鈍設備および連続焼鈍方法
JP5790898B1 (ja) * 2013-11-07 2015-10-07 Ｊｆｅスチール株式会社 連続焼鈍設備および連続焼鈍方法
US10415115B2 (en) 2013-11-07 2019-09-17 Jfe Steel Corporation Continuous annealing system and continuous annealing method
CN112609059A (zh) * 2020-12-10 2021-04-06 浙江海亮股份有限公司 链式退火炉及管材传送控制方法

Also Published As

Publication number Publication date
EP2806043A4 (en) 2015-06-10
JP2013147681A (ja) 2013-08-01
JP5505430B2 (ja) 2014-05-28
TW201339318A (zh) 2013-10-01
TWI488975B (zh) 2015-06-21
CN105671301B (zh) 2018-01-09
KR101644730B1 (ko) 2016-08-01
EP2806043B1 (en) 2018-07-18
CN105671301A (zh) 2016-06-15
US9702020B2 (en) 2017-07-11
CN104053796B (zh) 2016-03-16
EP2806043A1 (en) 2014-11-26
US20150013851A1 (en) 2015-01-15
KR20140119104A (ko) 2014-10-08
CN104053796A (zh) 2014-09-17

Similar Documents

Publication Publication Date Title
JP5505430B2 (ja) 鋼帯の連続焼鈍炉及び連続焼鈍方法
JP5510495B2 (ja) 鋼帯の連続焼鈍炉、連続焼鈍方法、連続溶融亜鉛めっき設備及び溶融亜鉛めっき鋼帯の製造方法
JP5071551B2 (ja) 鋼帯の連続焼鈍方法、溶融亜鉛めっき方法
JP5505461B2 (ja) 鋼帯の連続焼鈍炉、鋼帯の連続焼鈍方法、連続溶融亜鉛めっき設備及び溶融亜鉛めっき鋼帯の製造方法
CN104379776B (zh) 钢带的连续退火方法、钢带的连续退火装置、熔融镀锌钢带的制造方法以及熔融镀锌钢带的制造装置
KR101642633B1 (ko) 강대의 연속 어닐링 방법 및 용융 아연 도금 강대의 제조 방법

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201380005671.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13738991

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 14372649

Country of ref document: US

ENP Entry into the national phase

Ref document number: 20147021987

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2013738991

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE