WO2014208003A1 - Combined treatment equipment for hot dip galvanizing of steel plate and continuous annealing - Google Patents
Combined treatment equipment for hot dip galvanizing of steel plate and continuous annealing Download PDFInfo
- Publication number
- WO2014208003A1 WO2014208003A1 PCT/JP2014/002846 JP2014002846W WO2014208003A1 WO 2014208003 A1 WO2014208003 A1 WO 2014208003A1 JP 2014002846 W JP2014002846 W JP 2014002846W WO 2014208003 A1 WO2014208003 A1 WO 2014208003A1
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- WIPO (PCT)
- Prior art keywords
- continuous annealing
- dip galvanizing
- hot
- steel sheet
- annealing furnace
- Prior art date
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- 238000000137 annealing Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 238000005246 galvanizing Methods 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 17
- 239000008397 galvanized steel Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 230000035515 penetration Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 210000004894 snout Anatomy 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- C21D9/562—Details
- C21D9/565—Sealing arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
-
- 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
- C23C2/004—Snouts
-
- 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
-
- 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
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
Definitions
- the present invention relates to a combined treatment facility for hot dip galvanizing and continuous annealing of steel sheets.
- hot-dip galvanized steel sheets and cold-rolled steel sheets are each manufactured in separate lines (processing equipment).
- the hot-dip galvanized steel sheet means a steel sheet that is cold-rolled and then subjected to hot-dip galvanizing to become a product
- the cold-rolled steel sheet is a product that has not been hot-dip galvanized after being cold-rolled It means a steel plate.
- the equipment other than the hot dip galvanized steel sheet production line has hot dip galvanizing equipment and the cold rolled steel sheet production line has no hot dip galvanizing equipment. Therefore, it has been desired to manufacture a hot-dip galvanized steel sheet and a cold-rolled steel sheet in one line (combined processing facility).
- a hot dip galvanized steel sheet after annealing the steel sheet in a continuous annealing furnace, it may be passed through a hot dip galvanizing facility directly connected to the continuous annealing furnace, When manufacturing a cold-rolled steel sheet, after the steel sheet is annealed in a continuous annealing furnace, it is necessary to switch the path so as to pass a path that avoids hot dip galvanizing equipment.
- Patent Document 1 proposes a method of avoiding a galvanizing pot by extending and tilting a snout to avoid a galvanizing pot and avoiding a hot dip galvanizing facility and guiding it directly to a deflector roll.
- Patent Document 2 and Patent Document 3 propose a method of providing a bypass furnace and guiding the steel sheet to the next equipment (water quench equipment) without exposing the steel sheet to the atmosphere when avoiding hot dip galvanizing equipment. ing.
- the present invention has been made in view of the above circumstances, and as a combined treatment equipment for hot dip galvanizing and continuous annealing of steel sheets, hot dip galvanized steel sheets and cold rolling are not required without enormous equipment costs.
- An object of the present invention is to provide a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets, which can produce steel sheets with good quality.
- the present invention has the following features.
- Processing equipment for both hot dip galvanizing and continuous annealing of steel sheets comprising a continuous annealing furnace and hot dip galvanizing equipment, and a path through which the steel sheets annealed in the continuous annealing furnace are led to the hot dip galvanizing equipment and continuous annealing
- the steel plate annealed in the furnace is provided with a pass that avoids the hot dip galvanizing equipment, and the atmosphere is prevented from entering the continuous annealing furnace from the pass that avoids the hot dip galvanizing equipment at the outlet of the continuous annealing furnace.
- This is a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets in which a sealing device is installed.
- the sealing device is a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets according to [1], wherein the inside of the device is in a nitrogen gas atmosphere.
- the sealing device is a combined treatment facility for hot-dip galvanizing and continuous annealing of a steel sheet according to [2], wherein a seal roll is provided at the outlet of the device.
- the sealing apparatus is a combined treatment of hot dip galvanizing and continuous annealing of a steel sheet according to [2] or [3], wherein the pressure in the apparatus is higher than the furnace pressure and atmospheric pressure of the continuous annealing furnace. Facility.
- a hot-dip galvanized steel sheet which separately forms a hot-dip galvanized steel sheet and a cold-rolled steel sheet, using the combined treatment equipment for hot-dip galvanizing and continuous annealing of the steel sheet according to any one of [1] to [5] Cold-rolled steel sheet combined manufacturing method.
- the hot-dip galvanized steel sheet and the cold-rolled steel sheet can be manufactured with good quality as a combined treatment equipment for hot-dip galvanizing and continuous annealing of the steel sheet without requiring enormous equipment costs.
- FIG. 1 is a diagram showing an embodiment of the present invention.
- FIG. 2 is a partially enlarged view of FIG.
- FIG. 3 is a diagram for showing operating conditions of the continuous annealing furnace in one embodiment of the present invention.
- FIG. 4 is a diagram for illustrating operating conditions of the sealing device in one embodiment of the present invention.
- FIG. 5 is a diagram showing the pressure distribution in one embodiment of the present invention.
- FIG. 1 is a view showing a combined treatment facility for hot-dip galvanizing and continuous annealing of a steel sheet in one embodiment of the present invention (hereinafter also simply referred to as “combined treatment facility”), and FIG. 2 is a portion of FIG. It is an enlarged view.
- the combined treatment facility in this embodiment is directly connected to the continuous annealing furnace 10 (the non-oxidizing furnace 11, the heating zone 12, the holding zone 13, the cooling zone 14) and the continuous annealing furnace 10.
- a hot dip galvanizing facility 20 zinc plating pot 21, sink roll 22
- an alloying furnace 30 are provided.
- the steel sheet 1 annealed in the continuous annealing furnace 10 is guided to the hot dip galvanizing equipment 20 via the turn-down roll 41 and subjected to hot dip galvanizing, and then the alloying furnace via the turn-up roll 42.
- 30A (pass for manufacturing hot dip galvanized steel sheet) 1A and the steel sheet 1 annealed in the continuous annealing furnace 10 avoids the hot dip galvanizing facility and passes through the turn-up roll 42 to the alloying furnace 30 (Cold-rolled steel plate manufacturing path) 1B is set, and a path switching unit 40 for switching between a hot-dip galvanized steel plate manufacturing path 1A and a cold-rolled steel plate manufacturing path 1B is provided.
- the sealing device 50 is installed.
- This sealing device 50 has a compact two-stage seal structure, and nitrogen gas (N 2 gas) is blown into the sealing device 50 from the N 2 gas nozzle 51 as a first-stage seal, and the inside of the sealing device 50 is nitrogen gas.
- N 2 gas nitrogen gas
- a seal roll 55 is provided at the outlet of the sealing device 50 as a second-stage seal.
- the oxygen concentration in the sealing device 50 becomes 90 volume ppm or less.
- FIG. 3 shows the result of examining the atmospheric oxygen concentration (cooling zone oxygen concentration) of the cooling zone 14 and the steel plate temperature on the outlet side of the cooling zone 14 (cooling zone outlet side plate temperature) as operating conditions of the continuous annealing furnace 10. Is. As shown in FIG. 3, in the region A (region in which the cooling zone oxygen concentration is 0 to 90 ppm by volume and the cooling zone outlet side plate temperature is 0 to 168 ° C.), the steel plate does not oxidize even when it is exposed to the atmosphere (circle mark).
- region B region where the cooling zone oxygen concentration exceeds 90 ppm by volume
- region C region where the cooling zone outlet side plate temperature exceeds 168 ° C.
- the above-mentioned conditions that the cooling zone oxygen concentration is 90 volume ppm or less and the cooling zone outlet side plate temperature is 168 ° C. or less can be stably secured. That is, the pressure in the sealing device 50 is made higher than the in-furnace pressure and the atmospheric pressure of the continuous annealing furnace 10, thereby preventing air from flowing into the continuous annealing furnace 10 and the continuous annealing furnace. The hydrogen gas in 10 is prevented from leaking into the atmosphere.
- FIG 5 shows the positions of the cooling zone pressure measuring port 62 for measuring the pressure in the cooling zone 14 and the position of the sealing device pressure measuring port 61 for measuring the pressure in the sealing device 50, and cooling. The pressure distribution in the belt 14 and the sealing device 50 is shown.
- a glow heater 58 is installed in the sealing device 50 in order to prevent damage caused by hydrogen combustion when hydrogen in the continuous annealing furnace 10 leaks into the sealing device 50.
- a flame-retardant refla seal is used as the material of the seal curtain 52.
- a flame retardant silica fiber 59 is installed below the seal curtain 52.
- an emergency N 2 gas nozzle 53 is installed in the sealing device 50, and a diffusion valve 45 is attached to the cooling zone 14.
- the operating conditions that the steel plate 1 does not oxidize even when exposed to the atmosphere (cooling zone oxygen concentration 90 ppm by volume or less, cooling zone outlet side plate temperature 168 ° C. or less)
- the confidentiality of the annealing furnace 10 is improved.
- the oxidation of the steel plate 1 is prevented.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating With Molten Metal (AREA)
Abstract
A hot dip galvanized steel plate manufacturing path (1A) that guides a steel plate (1) that has been annealed in a continuous annealing furnace (10) to hot dip galvanizing equipment (20) and a cold rolled steel plate manufacturing path (1B) wherein the steel plate (1) that has been annealed in the continuous annealing furnace (10) avoids the hot dip galvanizing equipment are provided. Also provided, on an outlet of the continuous annealing furnace (10), is a sealing device (50) for preventing penetration of air from the cold rolled steel plate path (1B) into the continuous annealing furnace (10).
Description
本発明は、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備に関するものである。
The present invention relates to a combined treatment facility for hot dip galvanizing and continuous annealing of steel sheets.
通常、溶融亜鉛めっき鋼板と冷延鋼板はそれぞれ個別のライン（処理設備）で製造されている。ここで、溶融亜鉛めっき鋼板は、冷間圧延された後に溶融亜鉛めっきが施されて製品となる鋼板を意味し、冷延鋼板は、冷間圧延された後に溶融亜鉛めっきが施されずに製品となる鋼板を意味している。
Usually, hot-dip galvanized steel sheets and cold-rolled steel sheets are each manufactured in separate lines (processing equipment). Here, the hot-dip galvanized steel sheet means a steel sheet that is cold-rolled and then subjected to hot-dip galvanizing to become a product, and the cold-rolled steel sheet is a product that has not been hot-dip galvanized after being cold-rolled It means a steel plate.
しかしながら、溶融亜鉛めっき鋼板製造ラインと冷延鋼板製造ラインとでは、溶融亜鉛めっき鋼板製造ラインには溶融亜鉛めっき設備が有り、冷延鋼板製造ラインには溶融亜鉛めっき設備が無いこと以外は、設備の構成が酷似しているため、溶融亜鉛めっき鋼板と冷延鋼板をひとつのライン（兼用処理設備）で製造することが望まれていた。
However, in the hot dip galvanized steel sheet production line and the cold rolled steel sheet production line, the equipment other than the hot dip galvanized steel sheet production line has hot dip galvanizing equipment and the cold rolled steel sheet production line has no hot dip galvanizing equipment. Therefore, it has been desired to manufacture a hot-dip galvanized steel sheet and a cold-rolled steel sheet in one line (combined processing facility).
ただし、それを実現するためには、以下の問題に対処することが必要であった。
However, in order to realize it, it was necessary to deal with the following problems.
すなわち、溶融亜鉛めっき鋼板を製造する際には、鋼板を連続焼鈍炉で焼鈍した後、連続焼鈍炉に直結した溶融亜鉛めっき設備に導いて溶融亜鉛めっきを施すパスを通過させればよいが、冷延鋼板を製造する際には、鋼板を連続焼鈍炉で焼鈍した後、溶融亜鉛めっき設備を回避させるパスを通過させるように、パスを切替える必要がある。
That is, when producing a hot dip galvanized steel sheet, after annealing the steel sheet in a continuous annealing furnace, it may be passed through a hot dip galvanizing facility directly connected to the continuous annealing furnace, When manufacturing a cold-rolled steel sheet, after the steel sheet is annealed in a continuous annealing furnace, it is necessary to switch the path so as to pass a path that avoids hot dip galvanizing equipment.
その上、溶融亜鉛めっき設備を回避する際に、鋼板を高温のまま大気に触れさせると、鋼板が酸化されてしまい、表面外観や化成処理性が劣化することが問題となる。この鋼板が酸化する問題に対しては、酸洗設備を配置して、酸化膜を取り除く方法も考えられるが、設備費が膨大となるという問題がある。
In addition, when avoiding hot dip galvanizing equipment, if the steel sheet is exposed to the atmosphere at a high temperature, the steel sheet is oxidized, resulting in a problem that the surface appearance and chemical conversion treatment performance deteriorate. To solve the problem of oxidation of the steel plate, a method of removing the oxide film by arranging pickling equipment can be considered, but there is a problem that the equipment cost becomes enormous.
そこで、このような問題に対処するために、以下のような技術が提案されている。
Therefore, the following techniques have been proposed to deal with such problems.
まず、特許文献１には、溶融亜鉛めっき設備を回避する際に、スナウトを伸縮・傾動させて亜鉛めっきポットを回避し、直接デフレクターロールへ導く方法が提案されている。
First, Patent Document 1 proposes a method of avoiding a galvanizing pot by extending and tilting a snout to avoid a galvanizing pot and avoiding a hot dip galvanizing facility and guiding it directly to a deflector roll.
また、特許文献２や特許文献３には、溶融亜鉛めっき設備を回避する際に、バイパス炉を設けて、鋼板を大気に触れさせることなく、次設備（ウォータークエンチ設備）へ導く方法が提案されている。
Further, Patent Document 2 and Patent Document 3 propose a method of providing a bypass furnace and guiding the steel sheet to the next equipment (water quench equipment) without exposing the steel sheet to the atmosphere when avoiding hot dip galvanizing equipment. ing.
しかしながら、特許文献１に記載の方法の場合、パスの切替時間を短くして、亜鉛めっきポットを回避することができるが、スナウトの出側にシール装置が存在しないため、大気がスナウト内へ流入し、鋼板が酸化してしまう問題が解決できていない。
However, in the case of the method described in Patent Document 1, it is possible to shorten the path switching time and avoid the galvanizing pot. However, since there is no sealing device on the outlet side of the snout, the atmosphere flows into the snout. However, the problem that the steel plate is oxidized has not been solved.
また、特許文献２や特許文献３に記載の方法の場合、バイパス炉の新設や既存設備（合金化炉等）の移設など多額の設備費がかかることや、溶融亜鉛めっき鋼板の品質に影響を与えることが問題となる。
In addition, in the case of the methods described in Patent Document 2 and Patent Document 3, a large amount of equipment costs such as newly installing a bypass furnace and moving existing equipment (such as an alloying furnace) are required, and the quality of the hot dip galvanized steel sheet is affected. Giving is a problem.
本発明は、上記のような事情に鑑みてなされたものであり、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備として、膨大な設備費を必要とすることなく、溶融亜鉛めっき鋼板と冷延鋼板を良好な品質で製造することができる、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備を提供することを目的とするものである。
The present invention has been made in view of the above circumstances, and as a combined treatment equipment for hot dip galvanizing and continuous annealing of steel sheets, hot dip galvanized steel sheets and cold rolling are not required without enormous equipment costs. An object of the present invention is to provide a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets, which can produce steel sheets with good quality.
上記課題を解決するために、本発明は以下のような特徴を有している。
In order to solve the above problems, the present invention has the following features.
［１］鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備であって、連続焼鈍炉と溶融亜鉛めっき設備を備え、連続焼鈍炉で焼鈍された鋼板が溶融亜鉛めっき設備に導かれるパスと連続焼鈍炉で焼鈍された鋼板が溶融亜鉛めっき設備を回避するパスとが設けられているとともに、連続焼鈍炉の出口に、溶融亜鉛めっき設備を回避するパスから連続焼鈍炉に大気が侵入するのを防止するためのシール装置が設置されている、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。
[1] Processing equipment for both hot dip galvanizing and continuous annealing of steel sheets, comprising a continuous annealing furnace and hot dip galvanizing equipment, and a path through which the steel sheets annealed in the continuous annealing furnace are led to the hot dip galvanizing equipment and continuous annealing The steel plate annealed in the furnace is provided with a pass that avoids the hot dip galvanizing equipment, and the atmosphere is prevented from entering the continuous annealing furnace from the pass that avoids the hot dip galvanizing equipment at the outlet of the continuous annealing furnace. This is a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets in which a sealing device is installed.
［２］前記シール装置は、装置内が窒素ガス雰囲気になっている前記［１］に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。
[2] The sealing device is a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets according to [1], wherein the inside of the device is in a nitrogen gas atmosphere.
［３］前記シール装置は、装置の出口部にシールロールを備えている前記［２］に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。
[3] The sealing device is a combined treatment facility for hot-dip galvanizing and continuous annealing of a steel sheet according to [2], wherein a seal roll is provided at the outlet of the device.
［４］前記シール装置は、装置内の圧力が連続焼鈍炉の炉内圧力および大気圧より高くなっている前記［２］または［３］に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。
[4] The sealing apparatus is a combined treatment of hot dip galvanizing and continuous annealing of a steel sheet according to [2] or [3], wherein the pressure in the apparatus is higher than the furnace pressure and atmospheric pressure of the continuous annealing furnace. Facility.
［５］連続焼鈍炉の冷却帯の雰囲気酸素濃度が９０体積ｐｐｍ以下で、連続焼鈍炉の冷却帯出側の鋼板の温度が１６８℃以下である前記［１］～［４］のいずれかに記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。
[5] The above [1] to [4], wherein the atmospheric oxygen concentration in the cooling zone of the continuous annealing furnace is 90 ppm by volume or less, and the temperature of the steel sheet on the cooling zone exit side of the continuous annealing furnace is 168 ° C. or less. A combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets.
［６］前記［１］～［５］のいずれかに記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備を用いて、溶融亜鉛めっき鋼板と冷延鋼板を造り分ける、溶融亜鉛めっき鋼板と冷延鋼板の兼用製造方法。
[6] A hot-dip galvanized steel sheet, which separately forms a hot-dip galvanized steel sheet and a cold-rolled steel sheet, using the combined treatment equipment for hot-dip galvanizing and continuous annealing of the steel sheet according to any one of [1] to [5] Cold-rolled steel sheet combined manufacturing method.
本発明においては、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備として、膨大な設備費を必要とすることなく、溶融亜鉛めっき鋼板と冷延鋼板を良好な品質で製造することができる。
In the present invention, the hot-dip galvanized steel sheet and the cold-rolled steel sheet can be manufactured with good quality as a combined treatment equipment for hot-dip galvanizing and continuous annealing of the steel sheet without requiring enormous equipment costs.
本発明の一実施形態を図面に基づいて説明する。なお、本発明は以下の一実施形態に限定されない。
An embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following embodiment.
図１は、本発明の一実施形態における鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備（以下、単に「兼用処理設備」ともいう。）を示す図であり、図２は、図１の部分拡大図である。
FIG. 1 is a view showing a combined treatment facility for hot-dip galvanizing and continuous annealing of a steel sheet in one embodiment of the present invention (hereinafter also simply referred to as “combined treatment facility”), and FIG. 2 is a portion of FIG. It is an enlarged view.
図１、図２に示すように、この実施形態における兼用処理設備は、連続焼鈍炉１０（無酸化炉１１、加熱帯１２、保持帯１３、冷却帯１４）と、連続焼鈍炉１０に直結した溶融亜鉛めっき設備２０（亜鉛めっきポット２１、シンクロール２２）と、合金化炉３０とを備えている。
As shown in FIGS. 1 and 2, the combined treatment facility in this embodiment is directly connected to the continuous annealing furnace 10 (the non-oxidizing furnace 11, the heating zone 12, the holding zone 13, the cooling zone 14) and the continuous annealing furnace 10. A hot dip galvanizing facility 20 (zinc plating pot 21, sink roll 22) and an alloying furnace 30 are provided.
さらに、連続焼鈍炉１０で焼鈍された鋼板１がターンダウンロール４１を経由して溶融亜鉛めっき設備２０に導かれ、溶融亜鉛めっきを施された後、ターンアップロール４２を経由して合金化炉３０に至るパス（溶融亜鉛めっき鋼板製造用パス）１Ａと、連続焼鈍炉１０で焼鈍された鋼板１が溶融亜鉛めっき設備を回避し、ターンアップロール４２を経由して合金化炉３０に至るパス（冷延鋼板製造用パス）１Ｂが設定されていて、溶融亜鉛めっき鋼板製造用パス１Ａと冷延鋼板製造用パス１Ｂを切替えるパス切替部４０が設けられている。
Further, the steel sheet 1 annealed in the continuous annealing furnace 10 is guided to the hot dip galvanizing equipment 20 via the turn-down roll 41 and subjected to hot dip galvanizing, and then the alloying furnace via the turn-up roll 42. 30A (pass for manufacturing hot dip galvanized steel sheet) 1A, and the steel sheet 1 annealed in the continuous annealing furnace 10 avoids the hot dip galvanizing facility and passes through the turn-up roll 42 to the alloying furnace 30 (Cold-rolled steel plate manufacturing path) 1B is set, and a path switching unit 40 for switching between a hot-dip galvanized steel plate manufacturing path 1A and a cold-rolled steel plate manufacturing path 1B is provided.
その上で、この実施形態においては、連続焼鈍炉１０の出口に、溶融亜鉛めっき設備を回避するパス（冷延鋼板製造用パス）１Ｂから連続焼鈍炉１０に大気が侵入するのを防止するためのシール装置５０が設置されている。
In addition, in this embodiment, in order to prevent the atmosphere from entering the continuous annealing furnace 10 from the path (cold rolled steel sheet manufacturing path) 1B that avoids the hot dip galvanizing equipment at the outlet of the continuous annealing furnace 10. The sealing device 50 is installed.
このシール装置５０はコンパクトな２段シール構造となっていて、１段目シールとして、Ｎ２ガスノズル５１からシール装置５０内に窒素ガス（Ｎ２ガス）を吹込んで、シール装置５０内を窒素ガス雰囲気にしている。また、２段目シールとして、シール装置５０の出口部にシールロール５５を備えている。
This sealing device 50 has a compact two-stage seal structure, and nitrogen gas (N 2 gas) is blown into the sealing device 50 from the N 2 gas nozzle 51 as a first-stage seal, and the inside of the sealing device 50 is nitrogen gas. The atmosphere. In addition, a seal roll 55 is provided at the outlet of the sealing device 50 as a second-stage seal.
なお、シール装置５０内を窒素ガス雰囲気にする際には、シール装置５０内の酸素濃度が９０体積ｐｐｍ以下になるようにすることが好ましい。また、３０体積％以下の水素やアルゴンを混入することも可能である。
In addition, when making the inside of the sealing device 50 into nitrogen gas atmosphere, it is preferable to make it the oxygen concentration in the sealing device 50 become 90 volume ppm or less. Moreover, it is also possible to mix 30 volume% or less of hydrogen and argon.
次に、この実施形態における兼用処理設備での操業条件について述べる。
Next, the operating conditions in the combined processing facility in this embodiment will be described.
まず、図３は、連続焼鈍炉１０の操業条件として、冷却帯１４の雰囲気酸素濃度（冷却帯酸素濃度）と、冷却帯１４出側の鋼板温度（冷却帯出側板温）について検討した結果を示すものである。図３に示すように、領域Ａ（冷却帯酸素濃度が０～９０体積ｐｐｍで冷却帯出側板温が０～１６８℃の領域）では、鋼板が大気に触れても酸化することがない（○印）のに対して、領域Ｂ（冷却帯酸素濃度が９０体積ｐｐｍを超える領域）や、領域Ｃ（冷却帯出側板温が１６８℃を超える領域）では、鋼板が大気に触れると酸化してしまう（□印）ことが分かった。
First, FIG. 3 shows the result of examining the atmospheric oxygen concentration (cooling zone oxygen concentration) of the cooling zone 14 and the steel plate temperature on the outlet side of the cooling zone 14 (cooling zone outlet side plate temperature) as operating conditions of the continuous annealing furnace 10. Is. As shown in FIG. 3, in the region A (region in which the cooling zone oxygen concentration is 0 to 90 ppm by volume and the cooling zone outlet side plate temperature is 0 to 168 ° C.), the steel plate does not oxidize even when it is exposed to the atmosphere (circle mark). In contrast, in region B (region where the cooling zone oxygen concentration exceeds 90 ppm by volume) and region C (region where the cooling zone outlet side plate temperature exceeds 168 ° C.), the steel plate is oxidized when it comes into contact with the atmosphere ( □)
そこで、シール装置５０の操業条件としては、上記の冷却帯酸素濃度が９０体積ｐｐｍ以下で冷却帯出側板温が１６８℃以下という条件を安定して確保できるようにしている。すなわち、シール装置５０内の圧力が連続焼鈍炉１０の炉内圧力および大気圧よりも高くなるようにしており、それによって、大気が連続焼鈍炉１０内に流入しないようにするとともに、連続焼鈍炉１０内の水素ガスが大気に漏れないようにしている。
Therefore, as the operating conditions of the sealing device 50, the above-mentioned conditions that the cooling zone oxygen concentration is 90 volume ppm or less and the cooling zone outlet side plate temperature is 168 ° C. or less can be stably secured. That is, the pressure in the sealing device 50 is made higher than the in-furnace pressure and the atmospheric pressure of the continuous annealing furnace 10, thereby preventing air from flowing into the continuous annealing furnace 10 and the continuous annealing furnace. The hydrogen gas in 10 is prevented from leaking into the atmosphere.
図４は、シール装置５０の具体的な操業条件として、シール装置５０内の圧力（シール装置内圧力）と、Ｎ２ガスノズル５１からシール装置５０内に吹き込む窒素ガスの流量（Ｎ２流量）の関係を示すものである。図４に基づいて、シール装置内圧力が連続焼鈍炉１０内の最大圧力（最大炉内圧力＝８．２ｍｍＨ２Ｏ）以上となるように、Ｎ２流量を１１５Ｎｍ３／ｈ以上に設定している。また、シールロール５５間の隙間を狭小化することで、シール装置内圧力の保持を図っている。
FIG. 4 shows the specific operating conditions of the sealing device 50: the pressure in the sealing device 50 (pressure in the sealing device) and the flow rate of nitrogen gas blown into the sealing device 50 from the N 2 gas nozzle 51 (N 2 flow rate). It shows the relationship. Based on FIG. 4, the N 2 flow rate is set to 115 Nm 3 / h or more so that the pressure in the sealing device is equal to or greater than the maximum pressure in the continuous annealing furnace 10 (maximum furnace pressure = 8.2 mmH 2 O). Yes. In addition, the internal pressure of the sealing device is maintained by narrowing the gap between the seal rolls 55.
ちなみに、図５には、冷却帯１４の圧力を測定するための冷却帯圧力測定口６２と、シール装置５０内の圧力を測定するためのシール装置内圧力測定口６１の位置を示すとともに、冷却帯１４とシール装置５０内の圧力分布を示している。
5 shows the positions of the cooling zone pressure measuring port 62 for measuring the pressure in the cooling zone 14 and the position of the sealing device pressure measuring port 61 for measuring the pressure in the sealing device 50, and cooling. The pressure distribution in the belt 14 and the sealing device 50 is shown.
なお、図２に示しているように、もし連続焼鈍炉１０内の水素がシール装置５０に漏れた際、水素の燃焼による被害を防ぐため、シール装置５０には、グローヒータ５８が設置されているとともに、シールカーテン５２の材質として難燃性のレフラシールを使用している。また、シールカーテン５２の下方には難燃性のシリカ繊維５９が設置されている。さらに、シール装置５０には、非常用Ｎ２ガスノズル５３が設置され、冷却帯１４には放散弁４５が取り付けられている。
As shown in FIG. 2, a glow heater 58 is installed in the sealing device 50 in order to prevent damage caused by hydrogen combustion when hydrogen in the continuous annealing furnace 10 leaks into the sealing device 50. In addition, a flame-retardant refla seal is used as the material of the seal curtain 52. A flame retardant silica fiber 59 is installed below the seal curtain 52. Further, an emergency N 2 gas nozzle 53 is installed in the sealing device 50, and a diffusion valve 45 is attached to the cooling zone 14.
このようにして、この実施形態においては、焼鈍炉１０の冷却帯１４で、鋼板１が大気に触れても酸化しない操業条件（冷却帯酸素濃度９０体積ｐｐｍ以下、冷却帯出側板温１６８℃以下）で冷却するとともに、その操業条件を安定的に保持できるように、冷延鋼板製造用パス１Ｂ上の焼鈍炉１０出側にコンパクトなシール装置２０を設置することで、焼鈍炉１０の機密性を向上させることによって、鋼板１の酸化を防止するようにしている。
Thus, in this embodiment, in the cooling zone 14 of the annealing furnace 10, the operating conditions that the steel plate 1 does not oxidize even when exposed to the atmosphere (cooling zone oxygen concentration 90 ppm by volume or less, cooling zone outlet side plate temperature 168 ° C. or less) By installing a compact sealing device 20 on the exit side of the annealing furnace 10 on the cold-rolled steel sheet manufacturing pass 1B so that the operating conditions can be stably maintained, the confidentiality of the annealing furnace 10 is improved. By improving, the oxidation of the steel plate 1 is prevented.
したがって、このような鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備を用いることによって、膨大な設備費を必要とすることなく、溶融亜鉛めっき鋼板と冷延鋼板を良好な品質で造り分けることが可能になる。
Therefore, by using such hot-dip galvanizing and continuous annealing treatment equipment for steel sheets, it is possible to produce hot-dip galvanized steel sheets and cold-rolled steel sheets with good quality without requiring enormous equipment costs. It becomes possible.
１ 鋼板
１Ａ 溶融亜鉛めっき鋼板製造用パス
１Ｂ 冷延鋼板製造用パス
１０ 連続焼鈍炉
１１ 無酸化炉
１２ 加熱帯
１３ 保持帯
１４ 冷却帯
２０ 溶融亜鉛めっき設備
２１ 亜鉛めっきポット
２２ シンクロール
３０ 合金化炉
４０ パス切替部
４１ ターンダウンロール
４２ ターンアップロール
４５ 放散弁
５０ シール装置
５１ Ｎ２ガスノズル
５２ シールカーテン
５３ 非常用Ｎ２ガスノズル
５５ シールロール
５８ グローヒータ
５９ シリカ繊維
６１ シール装置内圧力測定口
６２ 冷却帯圧力測定口
DESCRIPTION OFSYMBOLS 1 Steel plate 1A Hot-dip galvanized steel plate manufacturing pass 1B Cold-rolled steel plate manufacturing pass 10 Continuous annealing furnace 11 Non-oxidizing furnace 12 Heating zone 13 Holding zone 14 Cooling zone 20 Hot-dip galvanizing equipment 21 Zinc plating pot 22 Sink roll 30 Alloying furnace 40 path switching unit 41 turn-down roll 42 turn-up roll 45 diffusion valve 50 sealing device 51 N 2 gas nozzle 52 seal curtain 53 emergency N 2 gas nozzle 55 seal roll 58 glow heater 59 silica fiber 61 pressure measuring port in sealing device 62 cooling zone pressure Measuring port
１Ａ 溶融亜鉛めっき鋼板製造用パス
１Ｂ 冷延鋼板製造用パス
１０ 連続焼鈍炉
１１ 無酸化炉
１２ 加熱帯
１３ 保持帯
１４ 冷却帯
２０ 溶融亜鉛めっき設備
２１ 亜鉛めっきポット
２２ シンクロール
３０ 合金化炉
４０ パス切替部
４１ ターンダウンロール
４２ ターンアップロール
４５ 放散弁
５０ シール装置
５１ Ｎ２ガスノズル
５２ シールカーテン
５３ 非常用Ｎ２ガスノズル
５５ シールロール
５８ グローヒータ
５９ シリカ繊維
６１ シール装置内圧力測定口
６２ 冷却帯圧力測定口
DESCRIPTION OF
Claims (6)
- 鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備であって、連続焼鈍炉と溶融亜鉛めっき設備を備え、連続焼鈍炉で焼鈍された鋼板が溶融亜鉛めっき設備に導かれるパスと連続焼鈍炉で焼鈍された鋼板が溶融亜鉛めっき設備を回避するパスとが設けられているとともに、連続焼鈍炉の出口に、溶融亜鉛めっき設備を回避するパスから連続焼鈍炉に大気が侵入するのを防止するためのシール装置が設置されている、鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。 This is a combined treatment facility for hot dip galvanizing and continuous annealing of steel sheets, which is equipped with a continuous annealing furnace and hot dip galvanizing equipment. And a path for avoiding the hot dip galvanizing equipment is provided to prevent the atmosphere from entering the continuous annealing furnace at the outlet of the continuous annealing furnace from the pass avoiding the hot dip galvanizing equipment. A combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets, where a sealing device is installed.
- 前記シール装置は、装置内が窒素ガス雰囲気になっている請求項１に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。 The said sealing apparatus is a combined treatment facility for hot dip galvanizing and continuous annealing of steel sheets according to claim 1, wherein the inside of the apparatus is in a nitrogen gas atmosphere.
- 前記シール装置は、装置の出口部にシールロールを備えている請求項２に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。 The said sealing apparatus is a combined treatment facility for hot-dip galvanizing and continuous annealing of steel sheets according to claim 2, wherein a sealing roll is provided at the outlet of the apparatus.
- 前記シール装置は、装置内の圧力が連続焼鈍炉の炉内圧力および大気圧より高くなっている請求項２または３に記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。 The combined treatment equipment for hot-dip galvanizing and continuous annealing of steel sheets according to claim 2 or 3, wherein the sealing device has a pressure in the device higher than the pressure in the continuous annealing furnace and the atmospheric pressure.
- 連続焼鈍炉の冷却帯の雰囲気酸素濃度が９０体積ｐｐｍ以下で、連続焼鈍炉の冷却帯出側の鋼板の温度が１６８℃以下である請求項１～４のいずれかに記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備。 The hot dip galvanizing of a steel sheet according to any one of claims 1 to 4, wherein the atmospheric oxygen concentration in the cooling zone of the continuous annealing furnace is 90 ppm by volume or less, and the temperature of the steel sheet on the cooling zone exit side of the continuous annealing furnace is 168 ° C or less. And continuous annealing treatment facility.
- 請求項１～５のいずれかに記載の鋼板の溶融亜鉛めっきと連続焼鈍の兼用処理設備を用いて、溶融亜鉛めっき鋼板と冷延鋼板を造り分ける、溶融亜鉛めっき鋼板と冷延鋼板の兼用製造方法。
6. Combined production of hot-dip galvanized steel sheet and cold-rolled steel sheet using the hot-dip galvanized and continuous annealing treatment facility for steel sheet according to any one of claims 1 to 5 Method.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112015032429A BR112015032429A2 (en) | 2013-06-26 | 2014-05-29 | combined treatment equipment for hot dip galvanizing of steel sheets and continuous annealing |
| JP2014543665A JP5928604B2 (en) | 2013-06-26 | 2014-05-29 | Combined treatment equipment for hot-dip galvanizing and continuous annealing of steel sheets |
| CN201480036525.9A CN105339520B (en) | 2013-06-26 | 2014-05-29 | The molten zinc plating of steel plate and the dual-purpose processing equipment of continuous annealing |
| MX2015017644A MX2015017644A (en) | 2013-06-26 | 2014-05-29 | Combined treatment equipment for hot dip galvanizing of steel plate and continuous annealing. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013133487 | 2013-06-26 | ||
| JP2013-133487 | 2013-06-26 |
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| WO2014208003A1 true WO2014208003A1 (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/002846 WO2014208003A1 (en) | 2013-06-26 | 2014-05-29 | Combined treatment equipment for hot dip galvanizing of steel plate and continuous annealing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5928604B2 (en) |
| CN (1) | CN105339520B (en) |
| BR (1) | BR112015032429A2 (en) |
| MX (1) | MX2015017644A (en) |
| WO (1) | WO2014208003A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371388A (en) * | 2016-08-27 | 2017-02-01 | 杭州新永丰钢业有限公司 | Continuous galvanized steel plate anti-strip-breaking detection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628863B (en) * | 2018-12-04 | 2023-08-29 | 苏州中门子工业炉科技有限公司 | Roller hearth furnace and process for full-hydrogen bright solid solution heat treatment of high-temperature nickel-base alloy pipe |
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- 2014-05-29 MX MX2015017644A patent/MX2015017644A/en unknown
- 2014-05-29 BR BR112015032429A patent/BR112015032429A2/en not_active Application Discontinuation
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2014208003A1 (en) | 2017-02-23 |
| CN105339520B (en) | 2017-11-17 |
| BR112015032429A2 (en) | 2017-07-25 |
| CN105339520A (en) | 2016-02-17 |
| JP5928604B2 (en) | 2016-06-01 |
| MX2015017644A (en) | 2016-04-07 |
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