KR20040030218A - Equipment for continuous molten metal plating - Google Patents
Equipment for continuous molten metal plating Download PDFInfo
- Publication number
- KR20040030218A KR20040030218A KR1020030035212A KR20030035212A KR20040030218A KR 20040030218 A KR20040030218 A KR 20040030218A KR 1020030035212 A KR1020030035212 A KR 1020030035212A KR 20030035212 A KR20030035212 A KR 20030035212A KR 20040030218 A KR20040030218 A KR 20040030218A
- Authority
- KR
- South Korea
- Prior art keywords
- temperature
- gas
- metal plating
- steel sheet
- strip
- Prior art date
Links
- 238000007747 plating Methods 0.000 title claims abstract description 76
- 239000002184 metal Substances 0.000 title claims abstract description 52
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 230000004044 response Effects 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- 238000001514 detection method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 210000004894 snout Anatomy 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 Zn and Al are melted Chemical class 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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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
- C23C2/02—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
-
- 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
-
- 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
- C23C2/34—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
Abstract
Description
본 발명은, 띠형상(帶形狀) 강판(鋼板)을 금속도금액에 연속적으로 침지(浸漬)시켜서 용융금속을 도금하는 연속 용융금속 도금설비에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous molten metal plating apparatus for plating molten metal by continuously immersing a strip-shaped steel sheet in a metal plating solution.
종래, 가열대, 가스 강제 대류식의 냉각대에 계속해서 설치된 연속 용융금속 도금설비가 공지되어 있다. 또한, 띠형상 강판을 연속적으로 금속도금액에 침지시키는 것에 의해 띠형상 강판에 연속 용융금속 도금을 할 경우, 금속도금액에 진입해 오는 띠형상 강판을 거의 금속도금액 온도로 정밀도 좋게 조절하는 것이 좋은 것은 주지(周知)되어 있다. 또한, 일반적으로 상기 금속도금액안에 진입해 오는 띠형상 강판의 길이방향의 온도의 불균일, 폭방향의 온도의 불균일에 대해서는, 모두 ±5℃ 정도가 금속 도금의 품질상, 온도정밀도상의 상한(上限)으로 되어 있다.Background Art Conventionally, a continuous molten metal plating facility provided continuously to a heating table and a gas forced convection cooling table is known. In addition, when continuous molten metal plating is performed on the strip-shaped steel sheet by continuously immersing the strip-shaped steel sheet in the metal plating solution, it is preferable to precisely control the strip-shaped steel sheet entering the metal plating solution to almost the metal plating temperature. The good is well known. In general, about the temperature nonuniformity of the longitudinal direction and the nonuniformity of the temperature of the width direction of the strip-shaped steel sheet which enters into the said metal plating solution, about +/- 5 degreeC is the upper limit on the quality of metal plating, and the temperature precision. It is.
상기 냉각대(冷却帶)에서는, 예를 들면, 띠형상 스텐레스 강판에 Zn 도금 할 경우, 이 동판(銅版)을 약 460℃까지 냉각하기 위해 100∼150℃의 가스가 띠형상 강판에 분사되어, 이 띠형상 강판과 분사되는 가스의 양자의 온도가 크고, 이것 때문에 띠형상 동판의 길이방향 및 폭방향에 있어서 온도의 불균일이 상기 온도정밀도상의 상한을 초과하여 발생하기 쉽다.In the cooling zone, for example, when Zn plating a strip-shaped stainless steel sheet, gas of 100 to 150 ° C is injected into the strip-shaped steel sheet to cool the copper plate to about 460 ° C. The temperature of both the strip-shaped steel sheet and the gas to be injected is large, and therefore, the temperature nonuniformity in the longitudinal direction and the width direction of the strip-shaped copper plate easily exceeds the upper limit on the temperature accuracy.
거기에서, 이와 같은 온도의 불균일을 축소하기 위해, 상기 냉각대에 계속되는 복사식(複寫式)의 판온도유지실이 설치된 연속 용융금속 도금설비가 알려져 있다.In order to reduce such a temperature nonuniformity, the continuous molten metal plating apparatus provided with the radiation type plate temperature holding chamber following the said cooling stand is known.
상기 종래의 복사식의 판온도유지실이 설치된 연속 용융금속 도금설비의 경우, 이 판온도유지실은 복사식이기 때문에, 띠형상 강판의 온도제어에 관한 응답성이 나쁘고, 또한 띠형상 강판에 대하여 소망(所望)의 온도정밀도를 달성하려고 하면, 이 판온도유지실이 지나치게 길어져, 큰 설치 스페이스를 필요로 한다고 하는 문제가 있다.In the case of the continuous molten metal plating apparatus provided with the above-described radiation type plate temperature holding chamber, since the plate temperature holding chamber is a radiation type, the response to the temperature control of the strip-shaped steel sheet is poor, and the strip-shaped steel sheet is desired. Attempting to achieve a temperature accuracy of an object has a problem that this plate temperature holding chamber becomes too long and requires a large installation space.
본 발명은, 이러한 종래의 문제를 시정하기 위한 것으로서, 짧은 길이로, 띠형상 강판의 온도제어에 관한 것으로서, 응답성을 양호하게 하고, 온도의 불균일이 적은 상태에서 띠형상 강판을 소망 온도로 유지하는 것을 가능하게 한 연속 용융금속 도금설비를 제공하려는 것을 목적으로 한다.The present invention relates to correcting such a conventional problem, and relates to temperature control of a strip-shaped steel sheet in a short length, and improves responsiveness and maintains the strip-shaped steel sheet at a desired temperature in a state where temperature unevenness is small. It is an object to provide a continuous molten metal plating facility that makes it possible to do so.
도 1은, 본 발명에 관한 연속 용융금속 도금설비의 전체 구성을 나타내는 도면.BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the whole structure of the continuous molten metal plating installation which concerns on this invention.
[도면의 주요부분에 대한 부호의 설명][Explanation of symbols on the main parts of the drawings]
1 : 연속 용융금속 도금설비11 : 판온도유지실1: Continuous molten metal plating equipment 11: Plate temperature holding room
12 : 도금욕조 도입공간부13 : 스나우트12: plating bath introduction space portion 13: snout
14 : 도금욕조21 : 노즐14 plating bath 21 nozzle
22 : 가스순환유로23 : 가열냉각부22: gas circulation flow path 23: heating cooling unit
24 : 압력제어밸브25 : 송풍기24: pressure control valve 25: blower
26 : 가열조절수단27 : 냉각조절수단26: heating control means 27: cooling control means
28 : 가이드롤29 : 도금액28: guide roll 29: plating solution
31 : 씽크롤51 : 판온도검출기31: Think 51: Plate temperature detector
52 : 도금액 온도검출기53 : 가스온도검출기52: plating liquid temperature detector 53: gas temperature detector
54 : 가스압력검출기55 : 온도지시조절계54 gas pressure detector 55 temperature indicating control system
56 : 연산기57 : 연산기56: calculator 57: calculator
58 : 연산기59 : 온도지시조절계58: calculator 59: temperature indicating controller
61 : 제어수단S : 띠형상 강판61 control means S: strip steel sheet
상기 과제를 해결하기 위해서, 본 발명은, 설정온도에 가열 유지된 금속 도금액을 수용한 도금욕조와, 용융금속 도금 가능한 온도로 냉각되어서 진입해 오는 띠형상 강판에 가스가 분사되어, 이 가스가 강제 대류시키는 분위기중을 상기 띠형상 동판이 통과되어서, 상기 금속 도금액에 연속적으로 송출됨과 동시에, 상기 분사되는 가스가, 상기 금속 도금액에 상기 띠형상 강판을 침지시켜서 용융금속 도금하는데 적합한 온도로 유지하도록 조정되는 판온도유지실을 구비한 구성으로 한다.MEANS TO SOLVE THE PROBLEM In order to solve the said subject, in this invention, gas is inject | poured into the plating bath which accommodated the metal plating liquid heated and maintained at the set temperature, and the strip-shaped steel plate which is cooled to the temperature which can be molten metal plated, and this gas is forced. During the convection atmosphere, the strip-shaped copper plate passes through and is continuously sent to the metal plating solution, and the injected gas is maintained at a temperature suitable for immersing the strip-shaped steel sheet in the metal plating solution and plating the molten metal. It is set as the structure provided with the board temperature holding chamber which becomes.
[발명의 실시의 형태][Embodiment of the Invention]
이어서, 본 발명의 실시형태를 도면에 따라서 설명한다.Next, embodiment of this invention is described according to drawing.
도 1은, 본 발명에 관한 연속 용융금속 도금설비(1)를 나타내고, 이 연속 용융금속 도금설비(1)는, 예를 들면 소둔로(燒鈍爐)의 가열대(加熱帶), 냉각대(冷却帶)에 계속해서 설치되고, 띠형상 강판(S), 예를 들면 냉간압연(冷間壓延) 강판이 연속적으로 순차 통과해가는 판온도유지실(11), 도금욕조 도입(導入)공간부(12), 스나우트(snout)(13) 및 도금욕조(14)를 구비하고 있다.1 shows a continuous molten metal plating apparatus 1 according to the present invention, and the continuous molten metal plating apparatus 1 is, for example, a heating table and a cooling table of an annealing furnace. The plate temperature holding chamber 11 and the plating bath introduction space portion, which are continuously installed in the virtue) and are continuously passed through the strip-shaped steel sheet S, for example, cold rolled steel sheet. 12, a snout 13, and a plating bath 14 are provided.
판온도유지실(11)의 내부에는, 가로방향으로 간격을 두고서 정렬 배치된 복수의 노즐(21)이, 띠형상 강판(S)에 가스분사 가능하게, 강판(S)의 상하에 2열로, 간격을 두고서 대향 배치되고, 판온도유지실(11)안에서 가스가 강제 대류되도록 되어 있다. 또한, 판온도유지실(11)에서는 가스순환유로(22)가 연장되어 있어, 이 가스순환유로(22)는, 예를 들면 가열수단으로서, 히터 또는 버너를 구비하고, 냉각수단으로서 쿨러를 구비한 가열냉각부(23), 압력제어밸브(24) 및 송풍기(25)를 지나서, 상기 노즐(21)의 각각에 접속되어 있다. 그리고, 상기 가열수단은, 예를 들면 사이리스터(thyristor)나 유량조절밸브를 이용한 가열조절수단(26)에 의해 가열강도의 조절이 실행되고, 상기 냉각수단은, 예를 들면 쿨러를 이용한 냉각조절수단(27)에 의해 냉각강도의 조절이 실행된다.In the inside of the plate temperature holding chamber 11, the plurality of nozzles 21 arranged in the horizontal direction at intervals are arranged in two rows above and below the steel sheet S to enable gas injection onto the strip-shaped steel sheet S. It is arrange | positioned at intervals and the gas is forced convection in the plate temperature holding chamber 11. In addition, in the plate temperature holding chamber 11, the gas circulation passage 22 is extended, and the gas circulation passage 22 includes, for example, a heater or a burner as a heating means, and a cooler as a cooling means. It is connected to each of the said nozzles 21 through the heating and cooling part 23, the pressure control valve 24, and the blower 25. As shown in FIG. The heating means is controlled by heating control means 26 using a thyristor or a flow control valve, for example, and the cooling means is a cooling control means using, for example, a cooler. By 27, adjustment of the cooling strength is performed.
도금욕조 도입공간부(12)는, 가이드롤(28)을 내장하고, 판온도유지실(11)로부터 진입해 온 띠형상 강판(S)을 가이드롤(28)에 의해 방향전환시켜서, 이어지는 스나우트(13)에 송출하고 있다.The plating bath introduction space part 12 incorporates the guide roll 28 and redirects the strip-shaped steel sheet S which has entered from the plate temperature holding chamber 11 by the guide roll 28, and is subsequently connected. It is sent to the naut 13.
스나우트(13)는, 그 선단부를, 예를 들면 Zn, Al등의 금속을 용융시킨 도금욕조(14)안의 금속 도금액(29)안에 위치시키고 있으며, 판온도유지실(11) 및 도금욕조 도입공간부(12)를 통과하여 온 띠형상 강판(S)을 금속 도금액(29)에 침지시키고 있다.The snout 13 has its tip portion placed in a metal plating solution 29 in a plating bath 14 in which metals such as Zn and Al are melted, and the plate temperature holding chamber 11 and the plating bath are introduced. The strip-shaped steel sheet S which has passed through the space portion 12 is immersed in the metal plating solution 29.
도금욕조(14)안에는, 씽크롤(31)이 설치되어 있어, 금속 도금액(29)에 침지(浸漬)되고, 도금 처리된 띠형상 강판(S)이 씽크롤(31)을 통해서 위쪽으로 안내되어서, 계속되는 공정으로 송출된다.In the plating bath 14, a sink roll 31 is provided, immersed in the metal plating solution 29, and the plate-shaped strip steel sheet S is guided upward through the sink roll 31, It is sent out in the subsequent process.
한편, 도금욕조 도입공간부(12)에 판온도검출기(51)를, 도금욕조(14)에 도금액 온도검출기(52)를, 가열냉각부(23)와 압력조절밸브(24)와의 사이의 가스순환유로(22) 부분에 가스온도검출기(53)를 각각 설치하였으며, 또 송풍기(25)와 판온도유지실(11)과의 사이의 가스순환유로(22) 부분에 가스압력검출기(54)를 설치하였다. 판온도검출기(5l)에 의해 금속 도금액(29)에 진입하기 직전의 띠형상 강판(S)의 온도가 검출되어, 검출된 강판온도(T1)를 나타내는 온도신호가 온도지시조절계(55)에 입력된다. 또한, 금속 도금액(29)은 도시하지 않는 도금액 가열수단에 의해 설정온도, 예를 들면 Zn 도금액의 경우는 약 450℃로 유지되어, 도금액 온도검출기(52)에 의해 그 금속 도금액(29)의 온도가 검출되고, 검출된 도금액온도(T2)를 나타내는 온도신호가 연산기(演算器)(56)에 입력된다. 상기 연산기(56)에서는 검출된 금속 도금액온도(T2)에 의거하여, 예를 들면 T2에 일정온도 20℃를 더하는 것에 의해, 금속 도금액(29)에 진입하는 띠형상 강판(S)의 바람직한 온도로서 설정판온도(T2')(＝T2+20℃)가 산출되어, 이 설정판온도(T2')를 나타내는 설정판온도신호가 온도지시조절계(55)에 입력된다.On the other hand, the plate temperature detector 51 in the plating bath introduction space 12, the plating liquid temperature detector 52 in the plating bath 14, the gas between the heating and cooling unit 23 and the pressure control valve 24 Gas temperature detectors 53 were respectively installed in the circulation passage 22, and a gas pressure detector 54 was provided in the gas circulation passage 22 between the blower 25 and the plate temperature holding chamber 11, respectively. Installed. The temperature of the strip-shaped steel sheet S immediately before entering the metal plating solution 29 is detected by the plate temperature detector 5l, and a temperature signal indicating the detected steel plate temperature T 1 is transmitted to the temperature indicating controller 55. Is entered. In addition, the metal plating liquid 29 is maintained at a set temperature, for example, about 450 ° C. in the case of a Zn plating liquid by a plating liquid heating means (not shown), and the temperature of the metal plating liquid 29 by the plating liquid temperature detector 52. Is detected, and a temperature signal indicative of the detected plating liquid temperature T 2 is input to the calculator 56. In the calculator 56, based on the detected metal plating solution temperature T 2 , for example, by adding a constant temperature of 20 ° C. to T 2 , the band-shaped steel sheet S entering the metal plating solution 29 is preferable. The set plate temperature T 2 ′ (= T 2 + 20 ° C.) is calculated as the temperature, and the set plate temperature signal indicating the set plate temperature T 2 ′ is input to the temperature indicating controller 55.
온도지시조절계(55)에서는, 강판온도(T1)와 설정판온도(T2')와의 온도차(△Ta)(＝T1-T2')를 나타내는 온도편차신호가 연산기(57 및 58)에 입력된다. 연산기(57)에서는, 온도차(△Ta)에 의거하여, 소망의 가스온도(T3)가 요구되고, 이 가스온도(T3)를 나타내는 온도신호가 온도지시조절계(59)에 입력된다. 이 온도지시조절계(59)에는, 또한 가스온도검출기(53)에 의해 검출된 가스순환유로(22)안의 가스온도(T4)를 나타내는 온도신호가 입력되어 있어, 소망의 가스온도(T3)와 검출된 가스온도(T4)와의 온도차(△Tb)(＝T3-T4)를 나타내는 온도편차신호가 제어수단(61)에 입력된다. 그리고, 상기 제어수단(61)에서, 노즐(21)로부터 분사되는 가스, 즉 가스순환유로(22)안의 가스가 가열되어야 할 것인가, 냉각되어야 할 것인가를 판단하여, 이 판단결과에 의거하여, 온도차(△Tb)를 제로로 하도록, 제어수단(61)으로부터 가열조절수단(26), 혹은 냉각조절수단(27)의 어느 하나인가에, 상기 가열수단에 의한 가열강도를 증감시키기 위한 신호, 혹은 상기 냉각수단에 의한 냉각강도를 증감시키기 위한 신호가 입력되고, 가스순환유로(22)안의 가스온도(TG)가, T2'-△T ≤TG≤T2'+△T가 성립하는 소정 범위내에, 예를 들면 T2'-15℃ ≤TG≤T2'+15℃가 되는 범위내에 유지된다.In the temperature indicating controller 55, a temperature deviation signal indicating a temperature difference ΔTa (= T 1 -T 2 ') between the steel plate temperature T 1 and the set plate temperature T 2 ' is calculated by the calculators 57 and 58. Is entered. In the calculator 57, a desired gas temperature T 3 is required based on the temperature difference ΔTa, and a temperature signal indicating the gas temperature T 3 is input to the temperature indicating controller 59. The temperature indicating controller 59 is further input with a temperature signal indicating the gas temperature T 4 in the gas circulation passage 22 detected by the gas temperature detector 53, and the desired gas temperature T 3 . And a temperature deviation signal indicating a temperature difference ΔTb (= T 3 -T 4 ) between the detected gas temperature T 4 and the control means 61. Then, in the control means 61, it is determined whether the gas injected from the nozzle 21, that is, the gas in the gas circulation passage 22 should be heated or cooled, and based on this determination result, the temperature difference A signal for increasing or decreasing the heating intensity by the heating means, to either of the heating adjusting means 26 or the cooling adjusting means 27 from the control means 61 so that (ΔTb) is zero. a signal for increasing or decreasing the cooling intensity of a cooling means is input, and the gas temperature in the gas circulating flow path (22) (T G) is, T 2 '- △ T ≤T G ≤T 2' + △ T is established for a given in the range, for example, T 2 is held in the range in which the '-15 ℃ ≤T g ≤T 2' + 15 ℃.
한편, 연산기(58)에서는, 온도차(△Ta)에 대응하는 설정압력(P0)이 구해지고, 이 설정압력(P0)을 나타내는 압력신호가 압력지시조절계(62)에 입력된다. 이 압력지시조절계(62)에는, 가스압력검출기(54)에 의해 검출된 가스순환유로(22)안의 가스압력(P1)을 나타내는 압력신호가 입력되어 있어, 설정압력(P0)과 검출된 가스압력(P1)과의 차압(差壓)(△P)(＝P0-P1)을 나타내는 압력편차신호가 제어수단(63)에 입력된다. 그리고, 상기 △P를 제로가 되도록 제어수단(63)으로부터의 제어신호에 의해 차압 압력제어밸브(24)의 열림정도 조절, 혹은 회전수 제어기(VVVF)(64)를 개재하여 송풍기(25)의 구동모터의 회전수 제어가 실행되고, 가스순환유로(22)안의 가스압력이 적정값으로 유지되어, 이 가스압력을 통해서 띠형상 강판(S)의 온도가 소망 범위내에 유지되게 되어 있다.On the other hand, in the calculator 58, the set pressure P 0 corresponding to the temperature difference ΔTa is obtained, and a pressure signal indicating the set pressure P 0 is input to the pressure indicating controller 62. The pressure indicating controller 62 is input with a pressure signal indicating the gas pressure P 1 in the gas circulation passage 22 detected by the gas pressure detector 54, and the set pressure P 0 and detected. The pressure deviation signal indicating the differential pressure DELTA P (= P 0 -P 1 ) with the gas pressure P 1 is input to the control means 63. Then, the opening degree of the differential pressure control valve 24 is adjusted by the control signal from the control means 63 so that? P becomes zero, or the blower 25 is controlled via the rotational speed controller (VVVF) 64. The rotation speed control of the drive motor is executed, and the gas pressure in the gas circulation passage 22 is maintained at an appropriate value, and the temperature of the strip-shaped steel sheet S is maintained within the desired range through this gas pressure.
더욱 상세히 설명하면, 압력제어밸브(24)의 밸브구동부의 응답속도는 송풍기(25)의 구동모터의 응답속도에 비해서 빠르고, 제어수단(63)으로부터 압력제어밸브(24) 및 송풍기(25)에 대하여 제어신호가 출력된 초기의 단계에서, 이 제어신호에 의거하여 즉시 응답하는 것은 압력제어밸브(24)만이다. 이것 때문에, 가스압력검출기(54)에 의한 검출압력이 지나치게 높을 경우는, 압력제어밸브(24)의 열림정도를 작게 하여 가는 것으로서 검출가스압력(P1)을 저하시켜 간다. 그리고, 검출가스압력(P1)이 설정압력(P0)에 도달하면, 압력제어밸브(54)의 열림정도를 기준 열림정도의 상태, 예를 들면 열림정도 약 70％의 상태로, 즉 열림방향으로 이행(移行)시킴과 동시에, 이것에 수반하는 압력변화가 발생하지 않도록 송풍기(25)의 구동모터의 회전수를 증대시켜 가며, 압력제어밸브(24)에 의한 압력변동분(壓力變動分)을 송풍기에 의해 보상한다. 이것에 대하여, 가스압력검출기(54)에 의한 검출가스압력이 너무 낮을 경우는, 압력제어밸브(24)의 열림정도를 크게 하여 가는 것으로서 검출가스압력(P1)을 상승시켜 간다. 그리고, 검출가스압력(P1)이 설정압력(P0)에 도달하면, 압력제어밸브(24)의 열림정도를 기준 열림정도의 상태, 예를 들면 열림정도 약 70％의 상태로, 즉 열림방향으로 이행시켜 가는 동시에, 이것에 따라 압력변화가 발생하지 않도록 송풍기(25)의 구동모터의 회전수를 저하(低下)시켜 가며, 압력제어밸브(24)에 의한 압력변동분을 송풍기(25)에 의해 보상한다.In more detail, the response speed of the valve driving portion of the pressure control valve 24 is faster than the response speed of the drive motor of the blower 25, and is controlled from the control means 63 to the pressure control valve 24 and the blower 25. In the initial stage at which the control signal is outputted, only the pressure control valve 24 responds immediately based on this control signal. Because of this, when the pressure detected by the gas pressure detector 54 is too high, the flow by reducing the detected gas pressure (P 1) as going to a smaller opening of the pressure control valve 24. Then, when the detection gas pressure P 1 reaches the set pressure P 0 , the opening degree of the pressure control valve 54 is set to the state of the standard opening degree, for example, the opening degree is about 70%, that is, the opening degree. The pressure fluctuation caused by the pressure control valve 24 while increasing the rotational speed of the drive motor of the blower 25 so as not to shift in the direction and to cause a pressure change accompanying the pressure change. Is compensated by the blower. On the contrary, when the detection gas pressure by the gas pressure detector 54 is too low, the detection gas pressure P 1 is raised by increasing the opening degree of the pressure control valve 24. Then, when the detection gas pressure P 1 reaches the set pressure P 0 , the opening degree of the pressure control valve 24 is set to a state of the standard opening degree, for example, the opening degree is about 70%, that is, the opening degree. Direction, and the rotation speed of the drive motor of the blower 25 is lowered so that a pressure change does not occur, and the pressure fluctuation by the pressure control valve 24 is transferred to the blower 25. Compensate by
이렇게, 압력제어밸브(24)의 열림정도를 일단 작게 혹은 크게 한 다음, 기준 열림정도의 상태로 되돌리는 것은, 그 다음, 검출압력(P1)이 변동했을 경우에, 응답성이 좋은 압력제어밸브(24)에 의해 신속하게 대응할 수 있게 해 두기 위해서다. 다시 말하면, 압력제어밸브(24)의 열림정도를 작게 한 채로 두고서, 검출가스압력(P1)이 지나치게 상승했을 경우, 혹은 상기 열림정도를 크게 한 채로 두고서, 검출가스압력(P1)이 지나치게 강하(降下)하였을 경우, 이것에 대처할 수 없게 되기 때문이다.In this way, the pressure is to return the opening of the control valve 24 to the one end a smaller or larger, then the state of the reference open degree, and then, detecting the pressure (P 1) if there is a change, response is good pressure control This is for enabling quick response by the valve 24. In other words, when the detection gas pressure P 1 rises excessively while the opening degree of the pressure control valve 24 is kept small, or the detection gas pressure P 1 is too large while the opening degree is made large. This is because when it descends, it cannot cope with this.
이제, 본 발명은, 압력제어밸브(24)와 송풍기(25)의 쌍방을 설치한 것에 한정하는 것이 아니고, 압력제어밸브(24)와 송풍기(25)안의 어느 한쪽만을 설치한 연속 용융금속 도금설비도 포함하는 것이다.Now, the present invention is not limited to providing both the pressure control valve 24 and the blower 25, but the continuous molten metal plating apparatus provided with only one of the pressure control valve 24 and the blower 25. It also includes.
이렇게, 상기 연속 용융금속 도금설비(1)에 있어서, 거의 도금액 온도로 판온도유지실(11)에 진입하여 온 강판(S)은, 노즐(21)로부터 분사되는 소정 온도의 가스압력이 조절되는 것에 의해, 강제 대류시키는 가스의 분위기 속에서 적온으로유지되어, 도금욕조 도입공간부(12) 및 스나우트(13)를 지나고, 소정 온도로 가열된 도금액(29)에 침지되어서, 용융금속 도금이 되어, 금속도금액(29)으로 계속되는 공정으로 송출된다.In this manner, in the continuous molten metal plating equipment 1, the gas pressure at a predetermined temperature injected from the nozzle 21 of the steel sheet S, which has entered the plate temperature holding chamber 11 at almost the plating liquid temperature, is controlled. Thus, the temperature is kept at a constant temperature in the atmosphere of the forced convection gas, passes through the plating bath introduction space 12 and the snout 13, and is immersed in the plating liquid 29 heated to a predetermined temperature. Then, it is sent out to the process which continues with the metal plating liquid 29. FIG.
또한, 본 발명은, 반드시 소둔로(燒鈍爐)에 부속된 설비일 필요는 없고, Zn 도금 이외에, 예를 들면 Al 도금용 설비라도 좋다.In addition, the present invention does not necessarily need to be a facility attached to the annealing furnace, and may be, for example, an Al plating facility other than Zn plating.
또한, 도 1에서는 가로형(橫型) 배치의 설비를 나타냈지만, 본 발명은 세로형(竪型) 배치의 설비도 포함하는 것이다.In addition, although the installation of a horizontal arrangement was shown in FIG. 1, this invention also includes the installation of a vertical arrangement.
또한, 본 발명에 있어서의 순환 가스의 온도, 압력제어계는 상술한 구성에 한정하는 것이 아니고, 판온도유지실내에서 가스가 강제 대류시키는 구성이면 좋다.In addition, the temperature and pressure control system of the circulating gas in the present invention are not limited to the above-described configuration, but may be configured such that gas is forced convection in the plate temperature holding chamber.
이상의 설명에 의하여 명확한 바와 같이, 본 발명에 의하면, 설정온도에 가열 유지된 금속도금액을 수용한 도금욕조와, 용융금속 도금 가능한 온도에 냉각되어서 진입해 오는 띠형상 강판에 가스가 분사되어, 이 가스가 강제 대류하게 되는 분위기중을 상기 띠형상 강판이 통과되어서, 상기 금속도금액에 연속적으로 송출됨과 동시에, 상기 분사되는 가스의 온도가 상기 금속도금액에 상기 띠형상 동판을 침지시켜서 용융금속 도금하는데 적합한 온도로 유지하도록 조정되는 판온도유지실을 구비한 구성으로 되어 있다.As apparent from the above description, according to the present invention, a gas is injected into a plating bath containing a metal plating solution heated and maintained at a set temperature, and a strip-shaped steel sheet which is cooled and entered at a temperature at which molten metal can be plated. The strip-shaped steel sheet passes through the atmosphere in which gas is forced convection and is continuously sent to the metal plating solution, and the temperature of the injected gas immerses the strip-shaped copper plate in the metal plating solution to plate the molten metal. And a plate temperature holding chamber which is adjusted to maintain a suitable temperature.
이렇게, 도금욕조의 입구쪽에 설치된 판온도유지실이 가스 강제 대류식이기 때문에, 여기에서 띠형상 강판의 온도제어에 관한 것이, 응답성이 양호하고, 판온도유지실의 전체 길이를 단축할 수 있고, 또한 온도의 불균일이 적은 상태에서 띠형상 강판을 소망 온도로 유지하여 띠형상 강판을 도금욕조에 유도하는 것이 가능하여, 금속 도금의 질을 향상시킬 수 있는 효과가 있다.Thus, since the plate temperature holding chamber provided at the inlet side of the plating bath is a gas forced convection type, the temperature control of the strip-shaped steel sheet is responsive here, and the overall length of the plate temperature holding chamber can be shortened. In addition, it is possible to guide the strip-shaped steel sheet to the plating bath by maintaining the strip-shaped steel sheet at a desired temperature in a state where the temperature nonuniformity is small, thereby improving the quality of metal plating.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2002288716A JP2004124144A (en) | 2002-10-01 | 2002-10-01 | Continuous hot-dip metal plating apparatus |
| JPJP-P-2002-00288716 | 2002-10-01 |
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| KR20040030218A true KR20040030218A (en) | 2004-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020030035212A KR20040030218A (en) | 2002-10-01 | 2003-06-02 | Equipment for continuous molten metal plating |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2004124144A (en) |
| KR (1) | KR20040030218A (en) |
| CN (1) | CN100362126C (en) |
| TW (1) | TWI274085B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5000361B2 (en) * | 2007-04-05 | 2012-08-15 | 新日本製鐵株式会社 | Method, apparatus, and computer program for controlling plate temperature in continuous processing line |
| CN105154806B (en) * | 2015-10-27 | 2017-12-15 | 中冶赛迪工程技术股份有限公司 | Temperature of steel strips homogenization precision control method and device before hot-dip |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023113A (en) * | 1988-08-29 | 1991-06-11 | Armco Steel Company, L.P. | Hot dip aluminum coated chromium alloy steel |
| WO1995000675A1 (en) * | 1993-06-25 | 1995-01-05 | Kawasaki Steel Corporation | Method of hot-dip-zinc-plating high-tension steel plate reduced in unplated portions |
| US6177140B1 (en) * | 1998-01-29 | 2001-01-23 | Ispat Inland, Inc. | Method for galvanizing and galvannealing employing a bath of zinc and aluminum |
| JP2001329253A (en) * | 2000-03-14 | 2001-11-27 | Kao Corp | Antistatic agent composition |
| JP4702974B2 (en) * | 2000-03-28 | 2011-06-15 | 日新製鋼株式会社 | Alloyed hot-dip galvanized high-tensile steel plate with excellent workability and method for producing the same |
-
2002
- 2002-10-01 JP JP2002288716A patent/JP2004124144A/en active Pending
-
2003
- 2003-05-23 TW TW092114034A patent/TWI274085B/en not_active IP Right Cessation
- 2003-06-02 KR KR1020030035212A patent/KR20040030218A/en not_active Application Discontinuation
- 2003-06-19 CN CNB031492983A patent/CN100362126C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1487113A (en) | 2004-04-07 |
| CN100362126C (en) | 2008-01-16 |
| JP2004124144A (en) | 2004-04-22 |
| TWI274085B (en) | 2007-02-21 |
| TW200405911A (en) | 2004-04-16 |
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