CN1231610C - Method for producing super-thin coat heat-zinc-plated product and apparatus thereof - Google Patents
Method for producing super-thin coat heat-zinc-plated product and apparatus thereof Download PDFInfo
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- CN1231610C CN1231610C CN 03117402 CN03117402A CN1231610C CN 1231610 C CN1231610 C CN 1231610C CN 03117402 CN03117402 CN 03117402 CN 03117402 A CN03117402 A CN 03117402A CN 1231610 C CN1231610 C CN 1231610C
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Abstract
The present invention relates to a manufacturing method of a hot galvanizing product with a superthin plating layer, and air blowing is used for controlling plating layer thickness; before the blowing operation is carried out, air is heated between a compressor and an air knife nozzle by a heating device. The heating device comprises a heater 23 and a temperature sensor 24, wherein the heater 23 is arranged outside or inside an air transmission pipeline, and the temperature sensor 24 is arranged in the air transmission pipeline. The present invention overcomes the defects of the excising air knife method, can easily realize the thickness reduction of the plating layer, ensures the uniformity of the plating layer thickness, and can realize the fast switchover of the normal plating layer and the superthin plating layer.
Description
Technical field
The present invention relates to a kind of superthin coated hot plating zinc product processes.
Background technology
On present wide steel strip Continuous Hot Dip Galvanizing Line, the gas blowing process is generally adopted in the control of zinc coating thickness, i.e. air knife method technology, and the attenuate of coating mainly is to realize by improving the air knife blow gas pressure.Because the winding-up air also has cooling effect to zinc liquid when having the zinc of scraping effect, along with air knife blows afloat the raising of pressure, pressurized air is accelerated the speed of cooling of zinc liquid, and on the one hand, coating uniformity control difficulty increases, the thick defective aggravation in limit; On the other hand, surpass certain pressure, the cooling effect meeting is got the upper hand, at this moment the coating phenomenon that can occur thickening on the contrary.The coating uniformly in order to obtain thin, the technical measures that adopt both at home and abroad mainly contain at present: adopt arc cutter lip, set up edge guard or limit closure assembly, employing side steps on air knife.The restraining effect of the above two opposite side lip defectives is very limited, though the latter can effectively suppress the thick generation of defects in limit, it still can't alleviate the cooling effect of winding-up air to zinc liquid, and investment is bigger.Existing wide steel strip Continuous Hot Dip Galvanizing Line is difficult to stably manufactured 100g/m
2Following superthin coated hot plating zinc product.
Concrete bibliography: the development of band steel pot galvanize, tight differential, metallurgical information guide, 1998 (4): 20～22 pages; Mechanism and prevention of adge over coatingin continous hot-dip galvanizing, Yoshiaki TAKEISHI et al.ISIJInternational, 2001 (11): 58～62; The limit portion zinc coating thickness control of hot-dip galvanized steel strip, tight light is medium, bao steel technology, 1996 (1): 16～19; Hot-dip galvanizing sheet steel production general introduction, Zhu Li, Anshan iron and steel plant technology, 1999 (4): 58～62.
Summary of the invention
The objective of the invention is, a kind of production method of superthin coated hot plating zinc product is provided, effectively control thickness of coating, guarantee that thickness of coating is even, reduce the cooling effect of gas zinc liquid.
The object of the present invention is achieved like this: the production method that a kind of superthin coated hot plating zinc product is provided, wherein, before winding-up, gas is heated, gas winding-up control thickness of coating with heating, between compressor and air knife nozzle by heating unit to gas heating, described gas is pressurized air.
Gas through described heating unit heated temperatures is: producing two-sided coating weight is 80～100g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 200～300 ℃, gas pressure intensity is 5000～6000Pa; Producing two-sided coating weight is 60～80g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 300～400 ℃, gas pressure intensity is 6000～7000Pa; Producing two-sided coating weight is 50～60g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 400～500 ℃, gas pressure intensity is 7000～8000Pa.
The present invention also provide a kind of in air knife method superthin coated hot plating zinc products production the heating unit to gas heating, it is characterized in that, comprise well heater and temperature sensor.Well heater places outside the gas pipe line or in the gas pipe line, temperature sensor places in the gas pipe line.
Described heating unit also comprises an insulation can and lagging material, and well heater and lagging material place in the insulation can.Described temperature sensor is a thermopair, and described well heater is an induction heater.
The invention has the beneficial effects as follows, overcome the defective of existing air knife method, be easy to realize the attenuate of thickness of coating, guarantee that thickness of coating is even, and can realize the quick switching of normal coating and ultra-thin coating.
Description of drawings
Fig. 1 is the inventive method synoptic diagram.
Fig. 2 is apparatus of the present invention synoptic diagram.
Embodiment
As shown in Figure 1, on the gas pipe line 4 between air compressor 1 and the air knife 3, set up an induction heating device 2, pressurized air is heated to certain temperature.
Produce two-sided coating weight 80～100g/m
2During the superthin coated hot plating zinc product, opening induction heater 23 trip switchs earlier heats, pressurized air enters induction heating device 2 through gas pipe line 4, induction heater 23 heats across 4 pairs of pressurized air of gas pipe line, when the electric thermo-couple temperature tester shows that compressed air temperature reaches 200～300 ℃, gas pressure intensity is transferred to 5000～6000Pa, and the pressurized air after the heating enters the air knife nozzle, blows to the plate face.Switch to normal coating if desired, earlier gas pressure intensity is transferred to 1000～4500Pa, turn off the induction heater switch again and stop heating.
Produce two-sided coating weight 60～80g/m
2During the superthin coated hot plating zinc product, opening induction heater 23 trip switchs earlier heats, pressurized air enters induction heating device 2 through gas pipe line 4, induction heater 23 heats across 4 pairs of pressurized air of gas pipe line, when the electric thermo-couple temperature tester shows that compressed air temperature reaches 300～400 ℃, gas pressure intensity is transferred to 6000～7000Pa, and the pressurized air after the heating enters the air knife nozzle, blows to the plate face.Switch to normal coating if desired, earlier gas pressure intensity is transferred to normal range 1000～4500Pa, turn off the induction heater switch again and stop heating.
Produce two-sided coating weight 50～60g/m
2During the superthin coated hot plating zinc product, opening induction heater 23 trip switchs earlier heats, pressurized air enters induction heating device 2 through gas pipe line 4, induction heater 23 heats across 4 pairs of pressurized air of gas pipe line, when the electric thermo-couple temperature tester shows that compressed air temperature reaches 400～500 ℃, gas pressure intensity is transferred to 7000～8000Pa, and the pressurized air after the heating enters the air knife nozzle, blows to the plate face.Switch to normal coating if desired, earlier gas pressure intensity is transferred to 1000～4500Pa, turn off the induction heater switch again and stop heating.
Heating unit comprises insulation can 21, lagging material 22 and places induction heater in the insulation can 21 that heating unit 2 is installed on gas pipe line 4 outsides as shown in Figure 2, and thermopair 24 in addition gas pipe line 4 in is used to measure compressed air temperature.
Claims (2)
1, a kind of production method of superthin coated hot plating zinc product wherein, heated gas before winding-up, and the gas winding-up control thickness of coating with heating is characterized in that, between compressor [1] and air knife nozzle by heating unit to gas heating.
2, the production method of superthin coated hot plating zinc product as claimed in claim 1 is characterized in that, gas through described heating unit heated temperatures is: producing two-sided coating weight is 80～100g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 200～300 ℃, gas pressure intensity is 5000～6000Pa; Producing two-sided coating weight is 60～80g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 300～400 ℃, gas pressure intensity is 6000～7000Pa; Producing two-sided coating weight is 50～60g/m
2Ultra-thin coating product the time, the gas temperature after the heating is 400～500 ℃, gas pressure intensity is 7000～8000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117402 CN1231610C (en) | 2003-03-06 | 2003-03-06 | Method for producing super-thin coat heat-zinc-plated product and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117402 CN1231610C (en) | 2003-03-06 | 2003-03-06 | Method for producing super-thin coat heat-zinc-plated product and apparatus thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100902083A Division CN100336933C (en) | 2003-03-06 | 2003-03-06 | Superthin coated hot plating zinc product production device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1438353A CN1438353A (en) | 2003-08-27 |
| CN1231610C true CN1231610C (en) | 2005-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03117402 Expired - Fee Related CN1231610C (en) | 2003-03-06 | 2003-03-06 | Method for producing super-thin coat heat-zinc-plated product and apparatus thereof |
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| CN (1) | CN1231610C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445900B (en) * | 2008-12-25 | 2010-06-09 | 杭州创宇金属制品科技有限公司 | Device and method for controlling thickness of hot-dipped galvanized layer or zinc alloy layer of steel wire |
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2003
- 2003-03-06 CN CN 03117402 patent/CN1231610C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1438353A (en) | 2003-08-27 |
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Granted publication date: 20051214 Termination date: 20160306 |