KR20030027107A - Dual-purpose installation for continuous annealing and hot dip plating - Google Patents

Dual-purpose installation for continuous annealing and hot dip plating Download PDF

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Publication number
KR20030027107A
KR20030027107A KR10-2003-7003140A KR20037003140A KR20030027107A KR 20030027107 A KR20030027107 A KR 20030027107A KR 20037003140 A KR20037003140 A KR 20037003140A KR 20030027107 A KR20030027107 A KR 20030027107A
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South Korea
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continuous annealing
plating
steel sheet
hot dip
hot
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KR10-2003-7003140A
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Korean (ko)
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호시노마사노리
데라하라고이치
다케무라모토후미
오카다노부요시
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신닛뽄세이테쯔 카부시키카이샤
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Publication of KR20030027107A publication Critical patent/KR20030027107A/en

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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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Abstract

본 발명은, 동일 설비에서 공정 라인을 전환하여 연속 소둔 강판과 용융 도금 강판을 생산하는 연속 소둔 및 용융 도금 겸용 설비를 제공한다. 연속 소둔 및 용융 도금 겸용 설비에서 도금조, 도금 장치를 거치지 않고 연속 소둔로부터 수냉 장치까지 강판을 안내하는 바이패스 장치를 설치함으로써, 연속 소둔재 제조 시에 소둔로에서 나온 강판이 외부 대기에 노출되어 산화되는 것을 방지할 수 있고, 저렴한 연속 소둔 및 용융 도금 겸용 설비를 실현할 수 있다.The present invention provides a continuous annealing and hot-dip galvanizing plant that produces a continuous annealing steel sheet and a hot-dip steel sheet by switching a process line in the same equipment. By installing a bypass device for guiding the steel plate from the continuous annealing to the water-cooling device without passing through the plating bath and the plating apparatus in the continuous annealing and hot dip plating equipment, the steel sheet from the annealing furnace is exposed to the outside atmosphere during the continuous annealing material production. Oxidation can be prevented and inexpensive continuous annealing and hot dip plating facilities can be realized.

Description

연속 소둔 및 용융 도금 겸용 설비{DUAL-PURPOSE INSTALLATION FOR CONTINUOUS ANNEALING AND HOT DIP PLATING}Continuous Annealing & Hot Dip Plating Equipment {DUAL-PURPOSE INSTALLATION FOR CONTINUOUS ANNEALING AND HOT DIP PLATING}

지금까지는, 연속 소둔 강판과 용융 도금 강판, 특히 용융 아연 도금 강판을 각각의 용도로 설계된 별개의 설비를 사용하여 제조하는 것이 일반적이었다. 한편, 동일한 설비에서 연속 소둔 강판과 용융 도금 강판을 생산하는 연속 소둔 및 용융 도금 겸용 설비가 일본 특공소 55-6469호와 일본 특원평 11-5298호에 제안되어 있다.Until now, it has been common to manufacture continuous annealed steel sheets and hot dip galvanized steel sheets, in particular hot dip galvanized steel sheets, using separate equipment designed for each purpose. On the other hand, the continuous annealing and hot dip galvanizing plant which produces a continuous annealing steel plate and a hot-dip steel plate in the same facility is proposed by Japanese Unexamined-Japanese-Patent No. 55-6469 and 11-5298.

일본 특공소 55-6469호에는, 연속 소둔 강판 생산 시에 연속 소둔로에서 나온 강판이 도금조에 침지되지 않고 대기 중에서 냉각되는 용융 도금 라인 및 연속 소둔 라인 겸용 설비가 개시되어 있다. 그러나, 연속 소둔로를 빠져 나온 직후의 강판의 온도는 높기 때문에, 아무런 조치도 취하지 않으면 강판 표면이 산화되는 문제가 있다. 표면의 산화막을 제거하기 위한 산세 장치를 설치하는 방안이 제안되어 있으나, 이로 인하여 설비 투자액의 증가, 폐액 처리 설비를 새로이 설치할 필요성 및 조업 부하 증대를 초래한다.Japanese Unexamined Patent Application Publication No. 55-6469 discloses a hot-dip galvanizing line and a continuous annealing line combined use facility in which a steel sheet from a continuous annealing furnace is not immersed in a plating bath at the time of continuous annealing steel sheet production. However, since the temperature of the steel sheet immediately after exiting the continuous annealing furnace is high, there is a problem that the surface of the steel sheet is oxidized if no action is taken. A method of installing a pickling device for removing the oxide film on the surface has been proposed, but this leads to an increase in the investment of equipment, the necessity of installing a new waste liquid treatment facility, and an increase in the operating load.

일본 특원평 11-5298호에는, 강판이 연속 소둔로에서 나와 외부 대기에 노출되었을 때에, 강판에 산화가 발생하지 않도록 연속 소둔로 출측에서의 강판 온도를 충분히 낮추는 장치가 개시되어 있다. 그러나, 강판이 대기에 접촉하여도 산화하지 않을 온도까지 강판을 냉각시키기 위해서는, 연속 소둔로 내의 냉각 설비 증대 및 그로 인한 설비 투자액의 증가가 필요하다.Japanese Patent Application Laid-Open No. 11-5298 discloses an apparatus that sufficiently lowers the steel sheet temperature at the continuous annealing furnace exit side so that oxidation does not occur in the steel sheet when the steel sheet exits the continuous annealing furnace and is exposed to the external atmosphere. However, in order to cool the steel sheet to a temperature at which the steel sheet does not oxidize even when it comes into contact with the atmosphere, it is necessary to increase the cooling facilities in the continuous annealing furnace and thereby increase the amount of equipment investment.

본 발명은, 동일한 설비에서 공정 라인을 전환하여 연속 소둔 강판과 용융 도금 강판을 생산하는 연속 소둔 및 용융 도금 겸용 설비에 관한 것이다.The present invention relates to a combined continuous annealing and hot dip galvanizing plant that produces a continuous annealing steel sheet and a hot dip galvanized steel sheet by switching a process line in the same facility.

도 1은 본 발명을 적용한 연속 소둔 및 용융 도금 겸용 설비를 나타내는 개략도이다.1 is a schematic diagram showing a continuous annealing and hot dip plating facility to which the present invention is applied.

본 발명은, 전술한 문제점들을 해결하고, 설비 비용을 크게 증가시키지 않으면서 강판의 연속 소둔 및 용융 도금 또는 용융 아연 도금 겸용 설비를 만드는 방안을 제시한다.The present invention solves the above-mentioned problems and proposes a method for making a continuous annealing and hot dip galvanizing or hot dip galvanizing plant of a steel sheet without significantly increasing the equipment cost.

전술한 과제를 해결하기 위한 본 발명의 요지는 다음과 같다.The gist of the present invention for solving the above problems is as follows.

(1) 강판의 이동 방향을 따라서, 적어도 연속 소둔로, 도금조, 도금 장치 및 수냉 장치가 공정 라인의 형태로 배치된 연속 소둔 및 용융 도금 겸용 설비에 있어서, 강판을 외부 대기에 노출시키지 않고 연속 소둔로에서 수냉 장치까지 안내할 수 있도록 하는 바이패스 장치를 구비하고, 그 내부는 비산화성 분위기로 유지되어 있는 것을 특징으로 하는 연속 소둔 및 용융 도금 겸용 설비.(1) A continuous annealing and hot dip plating facility in which at least a continuous annealing furnace, a plating bath, a plating apparatus, and a water cooling apparatus are arranged in the form of a processing line along a moving direction of the steel sheet, without continuously exposing the steel sheet to an external atmosphere. A continuous annealing and hot dip plating facility comprising a bypass device for guiding the annealing furnace to the water cooling device, the inside of which is maintained in a non-oxidizing atmosphere.

(2) 도금조 및 도금 장치의 뒤에 합금화로(合金化爐) 또는 강판 냉각 장치, 또는 두 가지 모두를 구비하고, 상기 (1)에 기재된 바이패스 장치가 설치된 것을 특징으로 하는 연속 소둔 및 용융 도금 겸용 설비.(2) A continuous annealing and hot-dip plating comprising an alloying furnace or a steel plate cooling apparatus or both, followed by a plating apparatus and a plating apparatus, and the bypass apparatus described in (1) above. Combined equipment.

(3) 바이패스 장치의 하부에 도금조, 도금 장치 및 크레인을 설치함으로써, 도금 장치 및 도금조 내 설치 기기의 반출, 수선 및 생산 능률의 향상을 가능하게하는 상기 (1) 또는 (2)에 기재된 연속 소둔 및 용융 도금 겸용 설비.(3) In the above (1) or (2), by installing a plating bath, a plating device, and a crane in the lower part of the bypass device, the carrying out, repairing, and improvement of production efficiency of the plating device and the installation device in the plating bath can be improved. Continuous annealing and hot dip combined use described.

이하, 실시예를 토대로 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to Examples.

도 1은, 본 발명을 적용한 연속소둔 및 용융 도금 겸용 설비의 소둔로 부위를 도시한 개략도이다. 강판(1)은 연속 소둔로(2) 내에서 소둔된다. 도금재 또는 아연 도금재 제조 시에, 강판(1)은 점선으로 도시한 바와 같이 연속 소둔로(2)를 지난 후에 도금조(3)로 공급되어 도금된다. 그 후, 도금 장치(4)에서 도금 부착량의 조정이 행해진 후에 필요에 따라 합금화로(5)에서 합금화 처리가 행해지고, 강판 냉각 장치(6)에서 냉각된 다음에 수냉 장치(7)에서 대략 상온까지 냉각된다. 이러한 일련의 공정 단계는 용융 도금재 또는 용융 아연 도금재 제조를 위한 일반적인 공정 단계와 동일하다.1 is a schematic diagram showing an annealing part of a continuous annealing and hot dip plating facility to which the present invention is applied. The steel sheet 1 is annealed in the continuous annealing furnace 2. In the manufacture of the plating material or the galvanizing material, the steel sheet 1 is supplied to the plating bath 3 and plated after passing through the continuous annealing furnace 2 as shown by the dotted line. Then, after adjustment of the plating adhesion amount is performed in the plating apparatus 4, alloying process is performed in the alloying furnace 5 as needed, it cools in the steel plate cooling apparatus 6, and then to about normal temperature in the water cooling apparatus 7 Is cooled. This series of process steps is the same as the general process steps for producing hot dip galvanized or hot dip galvanized.

연속 소둔 강판 제조 시에, 강판(1)은 도금조(3), 도금 장치(4), 합금화로(5) 및 냉각 설비(6)를 거치지 않고, 수냉 장치(7)에 의해 상온 근방의 온도까지 냉각되어야 한다. 그러나, 강판(1)이 연속 소둔로(2)를 지난 후에 외부 대기에 노출되면, 강판 표면은 산화된다. 본 발명에서는, 산화를 방지하기 위하여 바이패스 장치(8)를 설치하여, 강판이 외부 대기에 노출되지 않은 채로 연속 소둔로(2)에서 수냉 장치(7)까지 바로 이동할 수 있다.In the continuous annealing steel sheet production, the steel sheet 1 is subjected to a temperature near the normal temperature by the water cooling apparatus 7 without passing through the plating bath 3, the plating apparatus 4, the alloying furnace 5, and the cooling equipment 6. Should be cooled to However, when the steel sheet 1 is exposed to the outside atmosphere after passing the continuous annealing furnace 2, the steel sheet surface is oxidized. In the present invention, in order to prevent oxidation, a bypass device 8 is provided so that the steel sheet can move directly from the continuous annealing furnace 2 to the water cooling device 7 without being exposed to the external atmosphere.

바이패스 장치(8)의 내부는, 예를 들면 연속 소둔로와 동일한 분위기인 5∼10% H₂및 95∼90%N₂의 비산화성 분위기로 유지되어 있기 때문에, 강판(1)은 산화됨이 없이 수냉 장치(7)로 이송되어 냉각될 수 있다. 또한, 바이패스 장치(8)의 하부에 도금조(3), 도금 장치(4) 및 크레인(9)을 설치함으로써, 연속 소둔재 생산 중에 도금조, 도금 장치 또는 도금조 내 설치 기기의 반출과 수선이 가능하고, 그로 인하여 생산 능률을 향상시킨다.Since the inside of the bypass apparatus 8 is maintained in the non-oxidizing atmosphere of 5-10% H2 and 95-90% N2 which is the same atmosphere as a continuous annealing furnace, the steel plate 1 is not oxidized, for example. It can be transferred to the water cooling apparatus 7 and cooled. Further, by installing the plating bath 3, the plating device 4, and the crane 9 in the lower portion of the bypass device 8, it is possible to carry out the plating bath, the plating device, or the installation device in the plating bath during continuous annealing material production. Repair is possible, thereby improving production efficiency.

전술한 바와 같이, 본 발명을 연속 소둔, 용융 도금 및 용융 아연 도금 겸용 설비에 적용함으로써, 소둔 후의 강판 표면 상의 산화막 제거를 위한 산세 처리 설비를 생략하는 것이 가능하다. 또한, 연속 소둔재 제조 중에 크레인을 사용하여 도금조, 도금 장치 및 도금조 내의 설치 기기의 반출과 수선이 가능하고, 그로 인하여 생산 능률을 향상시킨다.As described above, by applying the present invention to a continuous annealing, hot dip galvanizing and hot dip galvanizing facility, it is possible to omit the pickling treatment facility for removing the oxide film on the surface of the steel sheet after annealing. In addition, it is possible to carry out and repair the plating bath, the plating apparatus, and the installation apparatus in the plating bath by using a crane during the manufacture of the continuous annealing material, thereby improving the production efficiency.

Claims (3)

강판의 이동 방향을 따라서, 적어도 연속 소둔로, 도금조, 도금 장치 및 수냉 장치가 공정 라인의 형태로 배치된 연속 소둔 및 용융 도금 겸용 설비에 있어서,In the continuous annealing and hot dip combined use equipment in which at least the continuous annealing furnace, the plating bath, the plating apparatus, and the water cooling apparatus are arranged in the form of a processing line along the moving direction of the steel sheet, 강판을 외부 대기에 노출시키지 않고 연속 소둔로에서 수냉 장치까지 안내할 수 있도록 하는 바이패스 장치를 구비하고, 그 내부는 비산화성 분위기로 유지되어 있는 것을 특징으로 하는 연속 소둔 및 용융 도금 겸용 설비.A bypass annealing and hot dip plating facility, comprising: a bypass device for guiding the steel sheet from the continuous annealing furnace to the water cooling device without exposing the steel sheet to the outside atmosphere, wherein the inside is maintained in a non-oxidizing atmosphere. 도금조 및 도금 장치의 뒤에 합금화로(合金化爐)와 강판 냉각 장치 중 하나 또는 두 가지 모두를 구비하고, 제 1 항에 기재된 바이패스 장치가 설치된 것을 특징으로 하는 연속 소둔 및 용융 도금 겸용 설비.An apparatus for continuous annealing and hot-dip galvanizing, comprising a plating apparatus and one or both of an alloying furnace and a steel plate cooling apparatus behind the plating bath and a bypass device according to claim 1. 제 1 항 또는 제 2 항에 있어서, 바이패스 장치의 하부에 도금조, 도금 장치 및 크레인을 설치함으로써, 도금 장치 및 도금조 내 설치 기기의 반출, 수선 및 생산 능률의 향상을 가능하게 하는 연속 소둔 및 용융 도금 겸용 설비.The continuous annealing according to claim 1 or 2, wherein a plating bath, a plating device, and a crane are provided below the bypass device, thereby enabling the carrying out, repairing, and improvement of production efficiency of the plating device and the installation device in the plating bath. And hot dip plating equipment.
KR10-2003-7003140A 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating KR20030027107A (en)

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