WO2011040303A1 - 連続溶融めっき及び連続焼鈍の兼用設備 - Google Patents
連続溶融めっき及び連続焼鈍の兼用設備 Download PDFInfo
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- WO2011040303A1 WO2011040303A1 PCT/JP2010/066394 JP2010066394W WO2011040303A1 WO 2011040303 A1 WO2011040303 A1 WO 2011040303A1 JP 2010066394 W JP2010066394 W JP 2010066394W WO 2011040303 A1 WO2011040303 A1 WO 2011040303A1
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- Prior art keywords
- furnace
- annealing
- continuous
- gas
- gas discharge
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- 238000000137 annealing Methods 0.000 title claims abstract description 219
- 238000003618 dip coating Methods 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 123
- 239000000463 material Substances 0.000 claims abstract description 123
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 238000007598 dipping method Methods 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 247
- 238000007747 plating Methods 0.000 claims description 86
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 11
- 239000003517 fume Substances 0.000 claims description 9
- 238000012360 testing method Methods 0.000 description 33
- 210000004894 snout Anatomy 0.000 description 16
- 230000008859 change Effects 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010583 slow cooling Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- -1 air Chemical compound 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
- B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
- B05C3/132—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length supported on conveying means
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- 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
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- 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
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- C21D9/667—Multi-station furnaces
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- 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
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- 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
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- 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
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- C23C2/003—Apparatus
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- C—CHEMISTRY; METALLURGY
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- 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
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- C—CHEMISTRY; METALLURGY
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- 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
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- 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
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- C23C2/0224—Two or more thermal pretreatments
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- 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
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- 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
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- C23C2/40—Plates; Strips
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- 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
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- 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
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- 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
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
- F27B9/3011—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
Definitions
- the present invention relates to a continuous hot-dip plating and continuous annealing combined facility that can be switched between a continuous hot-dip plating material production line and a continuous annealing material production line.
- a dual-purpose facility that can be operated by switching between a continuous hot-dip plated material production line for plated steel sheets and a continuous annealing material production line for cold-rolled steel sheets with a single facility has been proposed.
- the steel strip when used as a continuous hot-dip plating material production line, the steel strip is immersed in a hot-dip plating bath and hot-plated to the steel belt, while when used as a continuous annealing material production line.
- the hot-dip plating bath is bypassed to prevent hot-dip plating on the steel strip.
- a steel strip carry-out port 125 for drawing the steel strip W into the outside air outside the furnace is provided on the exit side of the annealing furnace 103.
- a dual-purpose facility 101 is disclosed in which when used as a continuous annealing material production line, the steel strip W is guided outside the furnace through the steel strip carry-out port 125 so as to bypass the hot dipping bath 105.
- reference numeral 111 denotes a heating zone for heating the steel strip W
- reference numeral 112 denotes a soaking zone that holds the heated steel strip W in a temperature range within a predetermined range
- reference numerals 113 and 114 Are a slow cooling zone and a cooling zone for cooling the steel strip W, respectively.
- patent document 3 when using it as a continuous annealing material manufacturing line, it was made to bypass the hot dipping bath by tilting up and down the snout which is guiding the steel strip into the hot dipping bath. Equipment is disclosed (not shown).
- the lower end portion 121b of the snout 121 is immersed in the hot-dip plating bath 105 as shown in FIG. 8A.
- the steel strip carrying-out port 125 used in order to bypass the hot dipping bath 105 at the time of use as a continuous annealing material production line is also closed.
- the atmospheric gas in the annealing furnace 103 is directed in the direction toward the steel strip entrance 123 used to carry the steel strip W into the annealing furnace 103, that is, in the direction from the exit side to the entrance side of the annealing furnace 103. Flows along Q1.
- each band 111, 112 in the annealing furnace 103 is used when used as a continuous hot-dip plated material production line and when used as a continuous annealing material production line.
- the furnace pressure balance in 113 and 114 will change. If such a change in the furnace pressure balance occurs, outside air may enter the annealing furnace 103 immediately after line switching or the like, and as a result, the quality of the steel strip may be degraded.
- the furnace pressure balance when a change in the furnace pressure balance occurs, in order to stabilize the quality of the steel strip both when used as a continuous hot-dip plating material production line and when used as a continuous annealing material production line, It is necessary to adjust the furnace pressure balance by adjusting each of the bands 111, 112, 113, and 114.
- the ratio of the atmospheric gas supply amount supplied from the atmospheric gas supply source 115 to each of the bands 111, 112, 113, 114 is adjusted by the flow rate adjusting valve 116 for each of the bands 111, 112, 113, 114.
- a method of adjusting the total supply amount of the atmospheric gas supplied from the atmospheric gas supply source 115 is adopted.
- atmospheric gas is discharged from both the inlet side and the outlet side of the annealing furnace 103 when used as a continuous annealing material production line, whereas only the inlet side of the annealing furnace 103 is used when used as a continuous molten plating material line. Atmospheric gas will be discharged from. This is because when the pressure in the annealing furnace 103 is kept at the same pressure during both line use times, the use as a continuous annealing material production line is more than the use as a continuous hot dipping material production line. This means that it is necessary to supply the atmospheric gas, and conventionally, the atmospheric gas is excessively used.
- a sealing device as shown in Patent Document 1 is provided in the vicinity of the steel strip carry-out port 125 of the annealing furnace 103 that will communicate with the outside air when used as a continuous annealing material production line. It is conceivable that the atmosphere gas in the annealing furnace 103 is prevented from flowing out of the furnace by installing. However, even if such a means is employed, it is difficult to completely suppress the outflow of the atmospheric gas to the outside of the furnace, and the above problem cannot be effectively solved.
- the present invention has been devised in view of the above-described problems, and the object of the present invention is to be able to switch between a continuous molten material production plating line and a continuous annealing material production line, and to produce a continuous annealing material.
- problems caused by changes in the direction of atmospheric gas flow in the annealing furnace when used as both lines It is an object of the present invention to provide a combined facility for continuous hot dipping and continuous annealing that can advantageously solve the above.
- the present inventor has invented the following continuous hot dipping and continuous annealing equipment after intensive studies.
- the continuous hot-dip plating and continuous annealing facility includes a continuous hot-dip plating material production line in which a steel strip annealed in an annealing furnace is immersed in a hot-dip bath, and the hot-dip plating A gas discharge port provided on the outlet side of the annealing furnace, which is configured to be able to switch between a continuous annealing material production line that bypasses the bath and guides the steel strip from the inside of the annealing furnace to the outside air outside the furnace And a gas discharge passage for discharging the atmospheric gas in the annealing furnace to the outside of the furnace; and a passage opening / closing means for opening and closing the gas discharge passage.
- the passage opening / closing means opens the gas discharge passage when used as the continuous hot dip plating material production line, and closes the gas discharge passage when used as the continuous annealing material production line.
- the facility may be configured as follows: flow rate adjusting means disposed in the gas discharge passage; and in the annealing furnace Furnace pressure measuring means for measuring the furnace pressure, and based on the furnace pressure measured by the furnace pressure measuring means when used as the continuous annealing material production line, A discharge amount of the atmospheric gas discharged from the inside of the annealing furnace to the outside of the furnace through the gas discharge passage during use is adjusted by the flow rate adjusting means.
- the continuous hot dip plating and continuous annealing combined facility described in the above (1) or (2) is disposed in the gas discharge passage, and sucks the atmospheric gas in the annealing furnace to the outside of the furnace
- a gas suction means for discharging the gas may be further provided.
- the gas suction means may be an ejector.
- the atmosphere in the annealing furnace is based on the negative pressure generated by the non-oxidizing gas supplied to the ejector. Gas may be sucked.
- the ejector may be arranged inside the furnace in the gas discharge passage with respect to the flow rate adjusting means.
- the cyclone may be disposed inside the furnace in the gas discharge passage with respect to the gas suction means.
- the direction in which the atmospheric gas flows in the annealing furnace is the same when both the continuous hot-dip plating material production line and the continuous annealing material production line are used. Can be adjusted. Furthermore, when compared with the time of use in both the continuous hot dip plating material production line and the continuous annealing material production line, it becomes possible to bring the gas discharge amounts discharged from the outlet side of the annealing furnace closer to each other. This makes it possible to stabilize the furnace pressure balance when using both lines.
- both lines can be used even when trying to keep the inside of the annealing furnace at the same pressure between applications in both lines. Therefore, the total supply amount of the atmospheric gas to be supplied into the annealing furnace can be made closer to each other. Accordingly, wasteful supply of atmospheric gas can be suppressed.
- operations necessary for obtaining these effects can be obtained only by opening / closing the passage opening / closing means, it is possible to simplify and shorten the line switching work.
- the amount of atmospheric gas discharged outside the furnace from the outlet side of the annealing furnace can be reduced when used as a continuous hot-dip plating material production line. It becomes possible to make it the same level when used as a continuous annealing material production line. As a result, the furnace pressure balance in the annealing furnace when using both lines can be more reliably stabilized. For this reason, it is possible to make the operating conditions such as the ratio and the total supply amount of the atmospheric gas supplied into the furnace the same for both lines. As a result, it is possible to greatly simplify and shorten the line switching work, and it is possible to reduce operation condition adjustment errors and stabilize the operation. In particular, once the atmospheric gas discharge is adjusted with the flow control valve, the only operation required to stabilize the furnace pressure balance is the opening / closing operation of the passage opening / closing means. It becomes possible to simplify and shorten the work.
- the furnace pressure balance when using as a continuous hot-dip plating material production line and when using it as a continuous annealing material production line is as follows. It is possible to remove metal fume contained in the atmospheric gas flowing through the gas discharge passage while stabilizing.
- a continuous hot-dip plating material production line (hereinafter also referred to as a plating material production line) and a continuous annealing material production line (hereinafter also referred to as an annealing material production line) can be switched.
- a plating material production line a continuous annealing material production line
- an annealing material production line a continuous annealing material production line
- FIG. 1 shows a configuration when used as a plating material production line
- FIG. 2 shows annealing. The structure at the time of use as a material manufacturing line is shown.
- the combined facility 1 includes an annealing furnace 3 for annealing the steel strip W and a hot dipping bath 5 for performing hot dip galvanizing or the like on the steel strip W.
- the annealing furnace 3 includes a heating zone 11 that heats the steel strip W, a soaking zone 12 that holds the heated steel strip W in a predetermined temperature range, a slow cooling zone 13 and a cooling zone 14 that cool the steel strip W. And.
- the steel strip W is carried into the annealing furnace 3 from a steel strip carry-in port 23 provided on the entrance side of the heating zone 11, and is subjected to heat treatment under predetermined conditions in each of the zones 11, 12, 13, and 14. After being annealed, it is conveyed to the exit side of the cooling zone 14. Atmosphere gas is supplied from the atmosphere gas supply source 15 into the furnaces of the bands 11, 12, 13, and 14 of the annealing furnace 3.
- the ratio of the flow rate of the atmospheric gas supplied from the atmospheric gas supply source 15 to each of the bands 11, 12, 13, 14 of the annealing furnace 3 is adjusted by the flow rate control valve 16.
- the atmospheric gas for example, a mixed atmospheric gas in which less than 10% by volume is H 2 and the balance is N 2 is used.
- the annealing furnace 3 further includes a cylindrical snout 21 installed between the outlet side and the hot dipping bath 5.
- the snout 21 is for immersing the steel strip W in the hot dipping bath 5 from the annealing furnace 3 without touching the outside air when used as a plating material production line.
- the upper end 21 a of the snout 21 is connected to the exit side of the annealing furnace 3, and the lower end 21 b is immersed in the hot dipping bath 5 in this embodiment.
- a gas discharge port 31 is provided on the outlet wall of the annealing furnace 3.
- One end (lower end) of the gas exhaust pipe 32 is connected to the gas exhaust port 31, and the other end (upper end) of the gas exhaust pipe 32 communicates with outside air outside the furnace.
- a gas discharge passage 33 for discharging the atmospheric gas in the annealing furnace 3 from the gas discharge port 31 to the outside of the furnace is formed in the gas discharge pipe 32.
- the other end of the gas discharge pipe 32 communicates with the outdoor space 34.
- an opening / closing valve 35 which is a means for opening and closing the gas discharge passage 33, is installed.
- the on-off valve 35 When the gas discharge passage 33 is opened by the on-off valve 35, the atmospheric gas in the annealing furnace 3 is discharged outside the furnace due to the pressure difference between the internal pressure inside the furnace and the external pressure outside the furnace.
- the on-off valve 35 is controlled to be opened or closed manually or by an electric operation according to the line to be used, and details thereof will be described later.
- the combined facility 1 of this embodiment includes a bypass mechanism 27 for bypassing the hot dipping bath 5 and guiding the steel strip W from the inside of the annealing furnace 3 to the outside air outside the furnace when used as an annealing material production line. ing.
- the bypass mechanism 27 includes a steel strip carry-out port 25 provided on the exit side of the annealing furnace 3 and an open / close damper 29 that opens and closes the steel strip carry-out port 25.
- the steel strip W is immersed in the hot dipping bath 5 and hot dipping is performed. Specifically, the steel strip W passing over the plating material production line is annealed in the annealing furnace 3 and then immersed in the hot dipping bath 5 through the snout 21 from the exit side of the annealing furnace 3. After this, the direction is changed upward by the guide roll 17 in the hot dipping bath 5 and drawn out from the hot dipping bath 5. After the amount of plating is adjusted by the gas wiping device 7, the subsequent process is performed. It is conveyed to.
- the steel strip carry-out port 25 When used as a plating material production line, the steel strip carry-out port 25 is closed by an open / close damper 29.
- the hot dipping is performed by bypassing the hot dipping bath 5 and guiding the steel strip W from the annealing furnace 3 to the outside air outside the furnace. It is set not to be applied to the steel strip W.
- the steel strip W passing on the annealing material production line is annealed in the annealing furnace 3 and then turned vertically upward toward the steel strip carry-out port 25 by the guide roll 18 and is previously opened and closed damper. It is guided into the outside air outside the furnace through the steel strip outlet 25 opened by 29.
- the steel strip W after this is continuously conveyed toward a post process similarly to the steel strip W when used as a plating material production line.
- the steel strip W on the annealing material production line is shown to join the plating material production line after being guided into the outside air outside the furnace through the steel strip carry-out port 25.
- the joining position is not particularly limited.
- the combined facility 1 opens the gas discharge passage 33 by opening the on-off valve 35 when used as a plating material production line.
- the gas discharge port 31 on the exit side communicates with outside air outside the furnace.
- the atmospheric gas in the annealing furnace 3 flows in two directions, a direction Q1 toward the entry side of the annealing furnace 3 and a direction Q2 toward the exit side. This means that the flowing direction of the atmospheric gas can be adjusted to be the same in both the plating material production line and the annealing material production line.
- the dual-purpose facility 1 closes the gas discharge passage 33 by closing the on-off valve 35 when used as an annealing material production line.
- the reason for this will be described. If the gas discharge passage 33 is left open during use as an annealing material production line, the steel strip carry-out port 25 is also open, so the amount of gas discharged from the exit side of the annealing furnace 3 to the outside of the furnace is reduced. Excessive. As a result, the amount of gas discharged from the outlet side of the annealing furnace 3 differs greatly between when used as a plating material production line and when used as an annealing material production line.
- the furnace pressure balance greatly changes when both lines are used, the amount of gas discharged from the outlet side of the annealing furnace 3 when both lines are used is brought close to stabilize the furnace pressure balance. Therefore, the gas discharge passage 33 is closed when used as an annealing material production line.
- the flow direction of the atmospheric gas in the annealing furnace 3 can be adjusted to be the same when both lines are used, and further, annealing is performed when both lines are used.
- the amount of gas discharged from the exit side of the furnace 3 can be made closer to each other. This makes it possible to stabilize the furnace pressure balance when the two lines are used.
- the inside of the annealing furnace 3 is maintained at the same pressure for both line usage times.
- FIG. 4A is a plan view showing the configuration of the gas discharge port 31 and the gas discharge pipe 32 provided on the outlet side of the annealing furnace 3, and FIG. 4B is a cross-sectional view taken along the line AA in FIG. 4A.
- the gas discharge ports 31 are preferably provided in the furnace walls 20 on both sides in the width direction of the steel strip W for the reason described below.
- the atmosphere gas in the annealing furnace 3 during use as a plating material production line contains a large amount of metal fumes generated from the hot dipping bath 5. For this reason, if the gas discharge port 31 is provided at a position close to the front and back surfaces of the steel strip W, such as above the steel strip W, the gas discharge is likely to be relatively low because it is connected to the gas discharge pipe 32.
- the metal fume is concentrated and solidified, and the resulting solid phase metal is deposited on the surrounding furnace wall and the like, and then drops and adheres to the steel strip W, thereby the quality of the steel strip W. There is a risk of lowering.
- the gas discharge port 31 In order to stabilize the furnace pressure balance when the gas discharge port 31 is close to the discharge position of the atmospheric gas in the annealing furnace 3 when both lines are used and compared with the use time of both lines, It is preferably provided in the vicinity of the outlet 25. Further, the gas discharge port 31 may be provided in the snout 21.
- the gas discharge passage 33 has been described as being formed in the gas discharge pipe 32 in the above-described embodiment. For example, the gas discharge passage 33 is formed in a hole provided in the furnace shell of the annealing furnace 3. May be.
- the number of the gas exhaust ports 31 and the gas exhaust passages 33 is not particularly limited, a plurality (a pair) of gas exhaust ports 31 are provided in the furnace wall 20 on both sides in the width direction of the steel strip W as shown in FIGS. 4A and 4B. Is provided, the gas discharge pipes 32 connected to the plurality of gas discharge ports 31 merge at the center position of the interval between the gas discharge ports 31, and the pipe shape until the merge is a steel strip. It is preferable to be configured to be symmetric along the width direction of W. Thereby, when a plurality of gas discharge pipes 32 are compared, it is possible to avoid a difference in pipe pressure loss between them, and evenly from the gas discharge ports 31 provided on both sides in the width direction of the steel strip W. The advantage that the atmospheric gas can be discharged is obtained.
- FIG. 5 is a longitudinal cross-sectional view showing a schematic configuration of the combined equipment 201 for continuous hot dip plating and continuous annealing according to the present embodiment.
- the dual-purpose facility 201 is a flow rate that is arranged in the gas discharge passage 33 and adjusts the gas flow rate flowing in the gas discharge passage 33. It further includes a flow rate control valve 37 that is an adjusting means, and a plurality of pressure gauges 38 that are means for measuring the furnace pressure in the annealing furnace 3.
- the plurality of pressure gauges 38 are provided at positions in the vicinity of the steel strip carry-out port 25 and the gas discharge port 31 and at positions of the strips 11, 12, and 13 in the annealing furnace 3.
- the flow rate adjusting valve 37 adjusts the amount of atmospheric gas discharged from the inside of the annealing furnace 3 through the gas discharge passage 33 to the outside of the furnace according to the opening of the valve.
- the discharge amount of the atmospheric gas during use as the plating material production line is adjusted by the flow rate control valve 37 based on the following idea.
- the atmosphere gas is discharged from the gas discharge passage 33 when used as a plating material production line, and the atmosphere from the steel strip carry-out port 25 when used as an annealing material production line. Gas is discharged out of the furnace.
- the amount of atmospheric gas discharged outside the furnace on the outlet side of the annealing furnace 3 is controlled by the opening / closing control of the flow rate control valve 37 as described above, when used as a plating material production line and when used as an annealing material production line. Although it is close to each other, there may be some difference. For this reason, in this embodiment, it adjusts so that it may become comparable when the discharge
- the pressure gauge 38 measures the furnace pressure P1 in the annealing furnace 3 when used as an annealing material production line. Subsequently, when used as a plating material production line, the furnace pressure P2 in the annealing furnace 3 measured by the pressure gauge 38 is approximately the same as the furnace pressure P1 based on the furnace pressure P1 measured in advance. Thus, the amount of atmospheric gas discharged from the inside of the annealing furnace 3 through the gas discharge passage 33 to the outside of the furnace is adjusted by the flow rate control valve 37.
- the amount of atmospheric gas discharged outside the furnace on the exit side of the annealing furnace 3 can be made comparable between when used as a plating material production line and when used as an annealing material production line. Become. As a result, it is possible to further reliably stabilize the furnace pressure balance in the annealing furnace 3 when both lines are used. For this reason, the operating conditions such as the ratio and the total supply amount of each zone 11, 12, 13, 14 of the atmospheric gas supplied into the furnace can be made the same in both lines. As a result, it is possible to greatly simplify and shorten the line switching operation, and it is possible to stabilize operation by reducing operation condition adjustment errors.
- furnace pressure information related to the furnace pressures P1 and P2 obtained by measurement with the pressure gauge 38 is transmitted to a process computer (not shown), and the transmitted furnace
- the process computer may adjust the opening degree of the flow control valve 37 based on the pressure information.
- At least one pressure gauge 38 is provided at a position where the furnace pressure in the vicinity of the steel strip carry-out port 25 and the gas discharge port 31 can be measured. This is because the vicinity of the steel strip carry-out port 25 and the gas discharge port 31 has a very large degree of change in the furnace pressure when both lines are used, and at least the furnace pressure at the measurement point is about the same in both lines. This is because the furnace pressure balance of the entire annealing furnace 3 can be made similar in both lines.
- FIG. 6 is a longitudinal cross-sectional view showing a schematic configuration of the combined equipment 301 for continuous hot-dip plating and continuous annealing according to the present embodiment.
- the dual-purpose facility 301 is disposed in the gas discharge passage 33 and the ejector 39 disposed in the gas discharge passage 33 in addition to the components of the dual-purpose facility 1 described in the first embodiment. And a cyclone 45.
- the ejector 39 is arranged in the gas discharge passage 33 as a gas suction means for sucking the atmospheric gas in the annealing furnace 3 and discharging it toward the outside of the furnace.
- the term “ejector 39” as used herein refers to the supply of gas from the gas supply port 40a of the ejector body 40 into the tapered nozzle 40b toward the inside, and the flow of the gas ejected from the tip of the nozzle 40b. A negative pressure is generated on the downstream side.
- the ejector 39 draws the atmospheric gas from the gas inlet 40c provided on the upstream side in the ejector main body 40 based on the generated negative pressure, and the gas flow provided on the downstream side in the ejector main body 40.
- the atmospheric gas sucked through the outlet 40d can be discharged toward the outside of the furnace.
- the gas supply port 40a of the ejector body 40 is connected to the other end of a supply pipe 41 having one end connected to the ejector gas supply source 42, and is non-oxidizing such as N 2 from the ejector gas supply source 42. Gas is supplied. Further, a flow rate adjusting valve 43 is arranged in the middle of the supply pipe 41, and the suction force of the ejector 39 can be controlled by adjusting the opening degree of the flow rate adjusting valve 43.
- the ejector 39 is arranged for the following reason.
- the atmospheric gas in the annealing furnace 3 is discharged out of the furnace through the gas discharge passage 33 due to a pressure difference between the internal pressure in the furnace and the external pressure of the outside air outside the furnace. For this reason, when fluctuations in the furnace pressure or the like occur during operation of the dual-purpose facility 1, there is a possibility that the outside air flows back from the outside of the furnace into the annealing furnace 3 through the gas discharge passage 33. If the outside air flows backward, the outside air concentration increases in the vicinity of the gas outlet 31 of the annealing furnace 3, which may adversely affect the quality of the steel strip W.
- an ejector 39 that sucks the atmospheric gas in the annealing furnace 3 is disposed in order to prevent the backflow of the outside air.
- a blower, a fan, or the like can be given as a means for sucking the atmospheric gas instead of the ejector 39.
- the atmosphere gas in the annealing furnace 3 is exhausted in a large amount, and the amount of the atmosphere gas to be supplied into the annealing furnace 3 needs to be greatly increased. Therefore, it is preferable to use the ejector 39.
- the suction force can be easily adjusted by operating the flow rate adjusting valve 43, so that the adoption is also preferable from this point.
- the gas to be supplied into the ejector 39 in order to generate a negative pressure in the ejector 39 may be an oxidizing gas containing oxygen such as air, but it is a non-oxidizing gas for the following reasons. Is preferred.
- the ejector 39 used as means for sucking the atmospheric gas in the annealing furnace 3 does not have a strong suction force, so the flow rate of the gas in the gas discharge passage 33 is not so fast. For this reason, oxygen contained in the outside air outside the annealing furnace 3 may enter the annealing furnace 3 through the gas discharge passage 33 due to diffusion.
- the gas supplied into the ejector 39 is an oxidizing gas
- oxygen contained in the oxidizing gas may similarly enter the annealing furnace 3.
- the gas to be supplied into the ejector 39 is a non-oxidizing gas.
- the downstream side in the ejector body 40 is filled with a non-oxidizing gas, and the oxygen concentration in the gas discharge passage 33 is reduced, thereby suppressing oxygen from entering the annealing furnace 3 due to diffusion. As a result, deterioration of the quality of the steel strip W can be suppressed.
- the ejector 39 when supplying a non-oxidizing gas into the ejector 39, it is preferable that the ejector 39 is disposed inside the furnace in the gas discharge passage 33 rather than the flow rate control valve 37, as shown in FIG. This is because when the ejector 39 is arranged inside the furnace with respect to the flow control valve 37, the non-oxidizing gas supplied from the ejector 39 is easily filled in the gas discharge passage 33 due to resistance by the flow control valve 37. This is because it is possible to more effectively suppress oxygen from entering the annealing furnace 3 by diffusion. This is particularly effective when the supply amount of the non-oxidizing gas supplied from the ejector 39 is small.
- the gas suction means such as the ejector 39 may be disposed outside the furnace in the gas discharge passage 33 with respect to the flow rate control valve 37. Further, when supplying the non-oxidizing gas into the ejector 39, the atmospheric gas in the annealing furnace 3 may be used, and the atmospheric gas may be boosted with a blower or the like and supplied into the ejector 39.
- the cyclone 45 functions as a dust removing device that separates solid particles, liquid droplets, and the like contained in the fluid by a difference in specific gravity using a centrifugal force generated when the fluid is swirled.
- the cyclone 45 is arranged to remove the metal fume contained in the atmospheric gas flowing through the gas discharge passage 33, thereby preventing the metal fume from being scattered into the outside air and improving the environmental conservation. It becomes possible to plan.
- a filter or the like is also conceivable as a dust removing device.
- pressure loss or clogging occurs, and it becomes difficult to exhaust the atmospheric gas in the annealing furnace 3 to the outside.
- the furnace pressure balance when using the line may become unstable. Therefore, it is preferable to use the cyclone 45 as the dust removing device.
- the cyclone 45 is preferably arranged in the gas discharge passage 33 at a position close to the inside of the furnace with respect to the ejector 39 and the like that are means for sucking the atmospheric gas.
- the ejector 39 described in the present embodiment may be used.
- FIG. 7 is a side view showing a schematic configuration of the dual-purpose facility 401 according to the present embodiment.
- bypass mechanism 127 is different from the bypass mechanism 27 described in the first embodiment.
- the bypass mechanism 127 of this embodiment is provided with a snout 121 that has a fulcrum shaft (not shown) attached to its upper end 121a and can be rotated up and down around the fulcrum shaft by driving a cylinder (not shown). Yes.
- the lower end 121c of the snout 121 When used as an annealing material production line, the lower end 121c of the snout 121 is pulled up on the bath surface of the hot dipping bath 5 by rotating the snout 121 upward about the fulcrum shaft.
- the lower end 121c of the snout 121 can be used as the steel strip carry-out port 25 for guiding the steel strip W from the inside of the annealing furnace 3 into the outside air outside the furnace.
- the guide roll 19 is previously arranged on the outlet side of the hot dipping bath 5
- the steel strip W annealed in the annealing furnace 3 is passed from the outlet side of the annealing furnace 3 to the snout 121 and the lower end of the snout 121.
- the steel strip W After sequentially passing 121c, the steel strip W can be transported in the same manner as described in the first embodiment by turning the steel strip W upward by the guide roll 19. .
- the bypass mechanism 127 is particularly suitable if it can bypass the hot dipping bath 5 and guide the steel strip W from the inside of the annealing furnace 3 to the outside air outside the furnace when used as an annealing material production line.
- the structure is not limited.
- steel strips are produced on both lines using a dual-purpose facility that can be switched between a plating material production line and an annealing material production line. It was decided to conduct a test.
- Test No. 1 and No. 2 are outside the scope of the present invention.
- test No. 1 a combined facility without the gas exhaust pipe 32 or the on-off valve 35 as shown in FIGS. 8A and 8B was used.
- test No. 2 although not shown, a dual-purpose facility having only the gas discharge pipe 32 and no on-off valve 35 was used.
- Test Nos. 3 to 5 are within the scope of the present invention.
- the combined facility 1 having the gas discharge pipe 32 and the on-off valve 35 shown in FIGS. 3A and 3B was used.
- the on-off valve 35 is configured to close the gas discharge passage 33 in the gas discharge pipe 32 when used as an annealing material production line and open the gas discharge passage 33 when used as a plating material production line. Has been.
- test No. 4 in addition to the conditions of test No. 3, as shown in FIG. 5, the flow rate control valve 37 disposed in the gas discharge passage 33 and the furnace pressure in the annealing furnace 3 are measured.
- the dual-purpose equipment 201 provided with the pressure gauge 38 was used.
- the furnace pressure P ⁇ b> 2 in each of the bands 11, 12, 13 and 14 was measured with a pressure gauge 38.
- the discharge amount of the atmospheric gas through the gas discharge passage 33 is such that the furnace pressure P2 when used as a plating material production line is the same as the furnace pressure P1 when used as an annealing material production line. Is adjusted in advance.
- test No. 5 in addition to the conditions of test No. 4, it is arranged in the gas discharge passage 33 as shown in FIG. 6, and the atmospheric gas in the annealing furnace 3 is sucked and directed outside the furnace.
- the combined facility 301 provided with the ejector 39 to be discharged was used.
- N 2 As a gas supplied to generate a negative pressure to the ejector 39, N 2 which is a non-oxidizing gas was used.
- the gas discharge passage 33, the on-off valve 35, the flow rate adjustment valve 37, and the ejector 39 are indicated by a circle when the same configuration as that of the above-described embodiments is used, and the same configuration is not used. In the case, it is indicated by ⁇ .
- each zone 111, 112 when used as an annealed material production line, each zone 111, 112 is supplied from the atmospheric gas supply source 115 so that the furnace pressure P1 of each zone 111, 112, 113, 114 is 200 Pa. , 113, 114 were adjusted by the flow rate control valve 116.
- the atmosphere gas supply source is operated without operating the flow rate control valve 116 so that the furnace pressure P2 of the heating zone 111 becomes 200 Pa when switching from the annealing material production line to the plating material production line. Only the total supply amount of atmospheric gas from 115 was adjusted.
- the furnace pressure in each zone 11, 12, 13, 14 of the annealing furnace 3 measured when both lines are used, and each zone 11, 12 in the annealing furnace 3 from the atmospheric gas supply source 15 when both lines are used. , 13, and 14, and the total supply amount of the atmospheric gas supplied to the evaluation.
- the oxygen concentration in the annealing furnace 3 in a normal state when using the plating material production line is set to 10 ppm, and this is used as a reference value, and the blower rotational speed of the cooling zone 14 is changed.
- the pressure was evaluated by measuring the amount of change in the oxygen concentration changed from the reference value when the pressure was changed artificially.
- the provision of the gas discharge pipe 32 only reverses the tendency of the furnace pressure balance to change when using both lines. It was confirmed that the maximum amount of change in the furnace pressure after switching to the plating material production line was 100 Pa.
- the change amount of the furnace pressure in the slow cooling zone is about 20 Pa after switching to the plating material production line, as can be grasped by comparison with test No. 1, and the cooling zone It can be confirmed that the amount of change in the furnace pressure is greatly reduced to about 50 Pa.
- the amount of change in the furnace pressure in each zone at the time of line switching can be reduced, and as a result, the furnace pressure balance can be stabilized when both lines are used. It was confirmed that.
- Test No. 3 as can be understood from the comparison with Test No. 1, the atmosphere required for setting the furnace pressure in the heating zone 11 to 200 Pa when switching from the annealing material production line to the plating material production line It can be confirmed that the amount of change in the total gas supply amount is reduced from 1000 m 3 / h to 200 m 3 / h. Thereby, the point which can suppress the useless supply of atmospheric gas by application of this invention has been confirmed.
- the furnace pressure in the heating zone 11 is set to 200 Pa when switching from the annealing material production line to the plating material production line, as can be understood by comparison with Test No. 1 and Test No. 3.
- it is not necessary to change the total supply amount of the atmospheric gas and it can be confirmed that the furnace pressures in the bands 11, 12, 13, and 14 before and after the line switching are the same.
- the application of the flow rate control valve 37 makes it possible to further reliably stabilize the furnace pressure balance when the two lines are used, and each zone 11, 12, It was confirmed that the operating conditions such as the ratio of 13 and 14 and the total supply amount could be made the same on both lines.
- Hot dipping bath 21 Snout 23 Steel strip inlet 25 Steel strip outlet 31 Gas outlet 32 Gas outlet pipe 33 Gas outlet passage 34 Outdoor space 35 Open / Close Valve 37 Flow Control Valve 38 Pressure Gauge 39 Ejector 45 Cyclone W Steel Strip
Abstract
Description
本願は、2009年10月01日に、日本国に出願された特願2009-229519号に基づき優先権を主張し、その内容をここに援用する。
まず、本発明の連続溶融めっき及び連続焼鈍の兼用設備(以下、単に「兼用設備1」と称する)の第1実施形態を説明する。図1、図2は、本実施形態に係る兼用設備1の概略的な構成を示す縦断面図であり、図1は、めっき材製造ラインとしての使用時の構成を示し、図2は、焼鈍材製造ラインとしての使用時の構成を示している。
次に、本発明に係る連続溶融めっき及び連続焼鈍の兼用設備の第2実施形態について説明する。なお、上記第1実施形態で説明したものと同一の構成要素については、同一の符号を付すことによって以下での説明を省略する。
本発明に係る連続溶融めっき及び連続焼鈍の兼用設備の第3実施形態について説明する。なお、上記第1実施形態で説明したものと同一の構成要素については、同一の符号を付すことによって以下での説明を省略する。
図6は、本実施形態に係る連続溶融めっき及び連続焼鈍の兼用設備301の概略的な構成を示す縦断面図である。
本発明に係る連続溶融めっき及び連続焼鈍の兼用設備の第4実施形態について説明する。なお、上記第1実施形態で説明したものと同一の構成要素については、同一の符号を付すことによって以下での説明を省略する。
図7は、本実施形態に係る兼用設備401の概略的な構成を示す側面図である。
3 焼鈍炉
5 溶融めっき浴
21 スナウト
23 鋼帯搬入口
25 鋼帯搬出口
31 ガス排出口
32 ガス排出管
33 ガス排出通路
34 屋外空間
35 開閉弁
37 流量調節弁
38 圧力計
39 エジェクター
45 サイクロン
W 鋼帯
Claims (8)
- 焼鈍炉内で焼鈍された鋼帯を溶融めっき浴内に浸漬させる連続溶融めっき材製造ラインと、前記溶融めっき浴を迂回させて前記鋼帯を前記焼鈍炉内から炉外の外気中に案内させる連続焼鈍材製造ラインとを切り替え可能に構成された連続溶融めっき及び連続焼鈍の兼用設備であって、
前記焼鈍炉の出側に設けられたガス排出口から、この焼鈍炉内の雰囲気ガスを前記炉外に排出するガス排出通路と;
このガス排出通路を開閉する通路開閉手段と;
を備え、
前記通路開閉手段が、前記連続溶融めっき材製造ラインとしての使用時には前記ガス排出通路を開き、前記連続焼鈍材製造ラインとしての使用時には前記ガス排出通路を閉じる
ことを特徴とする連続溶融めっき及び連続焼鈍の兼用設備。 - 前記ガス排出通路中に配置された流量調節手段と;
前記焼鈍炉内の炉圧を測定する炉圧測定手段と;を更に備え、
前記連続焼鈍材製造ラインとしての使用時に前記炉圧測定手段により測定された前記炉圧に基づいて、
前記連続溶融めっき材製造ラインとしての使用時に前記ガス排出通路を通して前記焼鈍炉内から前記炉外に排出される前記雰囲気ガスの排出量が、前記流量調節手段により調節される
ことを特徴とする請求項1に記載の連続溶融めっき及び連続焼鈍の兼用設備。 - 前記ガス排出通路中に配置され、前記焼鈍炉内の前記雰囲気ガスを吸引して前記炉外に排出するガス吸引手段を更に備えることを特徴とする請求項1又は2に記載の連続溶融めっき及び連続焼鈍の兼用設備。
- 前記ガス吸引手段がエジェクターであることを特徴とする請求項3に記載の連続溶融めっき及び連続焼鈍の兼用設備。
- 前記エジェクターが、その内部に供給された非酸化性ガスにより発生した負圧に基づき、前記焼鈍炉内の前記雰囲気ガスを吸引することを特徴とする請求項4に記載の連続溶融めっき及び連続焼鈍の兼用設備。
- 前記エジェクターが、前記ガス排出通路中の、前記流量調節手段よりも炉内側に配置されていることを特徴とする請求項5に記載の連続溶融めっき及び連続焼鈍の兼用設備。
- 前記ガス排出通路中に配置され、前記雰囲気ガスを旋回流としてこの雰囲気ガス中に含まれる金属ヒュームを除去するサイクロンを更に備えることを特徴とする請求項1に記載の連続溶融めっき及び連続焼鈍の兼用設備。
- 前記サイクロンが、前記ガス排出通路中の、前記ガス吸引手段よりも炉内側に配置されていることを特徴とする請求項7に記載の連続溶融めっき及び連続焼鈍の兼用設備。
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KR1020127008145A KR101324899B1 (ko) | 2009-10-01 | 2010-09-22 | 연속 용융 도금 및 연속 어닐링의 겸용 설비 |
BR112012006970-5A BR112012006970B1 (pt) | 2009-10-01 | 2010-09-22 | Equipamento de duplo propósito de revestimento contínuo por imersão a quente e recozimento contínuo |
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US13/498,461 US8714104B2 (en) | 2009-10-01 | 2010-09-22 | Dual-purpose facility of continuous hot-dip coating and continuous annealing |
MX2012003819A MX2012003819A (es) | 2009-10-01 | 2010-09-22 | Instalacion de doble proposito de revestimiento continuo por inmersion en caliente y recocido continuo. |
US14/098,245 US9127339B2 (en) | 2009-10-01 | 2013-12-05 | Dual-purpose facility of continuous hot-dip coating and continuous annealing |
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CN105312359A (zh) * | 2014-07-16 | 2016-02-10 | 上海梅山钢铁股份有限公司 | 低温退火带钢的板形控制方法 |
JP7444642B2 (ja) | 2020-03-05 | 2024-03-06 | 日鉄鋼板株式会社 | ヒューム除去装置 |
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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 |
FR3014447B1 (fr) * | 2013-12-05 | 2016-02-05 | Fives Stein | Procede et installation de traitement thermique en continu d'une bande d'acier |
JP6451138B2 (ja) * | 2014-08-11 | 2019-01-16 | Jfeスチール株式会社 | 鋼帯の製造方法 |
WO2017187226A1 (fr) * | 2016-04-26 | 2017-11-02 | Arcelormittal | Installation de revêtement au trempé à chaud et en continu d'une bande métallique et procédé associé |
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US10385419B2 (en) | 2016-05-10 | 2019-08-20 | United States Steel Corporation | High strength steel products and annealing processes for making the same |
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US20120180721A1 (en) | 2012-07-19 |
US20140090595A1 (en) | 2014-04-03 |
BR112012006970B1 (pt) | 2018-04-17 |
BR112012006970A2 (pt) | 2016-08-23 |
JPWO2011040303A1 (ja) | 2013-02-28 |
CN102656286B (zh) | 2013-09-04 |
KR20120062850A (ko) | 2012-06-14 |
JP5099265B2 (ja) | 2012-12-19 |
US8714104B2 (en) | 2014-05-06 |
MX2012003819A (es) | 2012-05-08 |
KR101324899B1 (ko) | 2013-11-04 |
US9127339B2 (en) | 2015-09-08 |
CN102656286A (zh) | 2012-09-05 |
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