Hot-dip Galvalume Line
Galvalume strip (GL) is made by cold rolling strip after hot-dip plating. This kind of strip has excellent corrosion resistance and it is used widely in the world, it replace galvanized strip. Aluminum strip has merits of corrosion resistance of air and oxidation resistance, the galvanized strip has the merits of electrochemical protection. GL strip has merits of aluminum strip and galvanized strip.
Process flow of hot-dip galvalume line:
Coil loading car →pay-off reelⅠ,Ⅱ→5-roll tension levelerⅠ→shear 1 →5-roll tension levelerⅡ→ shear 2 →2-roll pinch deviceⅠ→welding machine →2-roll pinch device Ⅱ→bridle rollⅠ→electrolytic degreasing section →steam drying deviceⅠ→bridle rollⅡ→rectifying roll (1# CPC) →vertical storing loopⅠ→rectifying roll (2# CPC) →bridle roll Ⅲ→tension measuring roller →heating furnace →soaking furnace →furnace throat →cooling furnace →temperature equalization furnace →thermal tension roller →furnace nose →zinc pot →sank roller →air knife →cooling tower →vertical air cooling unit 1#, 2#, 3# →Turning and rectifying roll(3#CPC)→horizontal air cooling unit →turning roll→vertical air cooling unit 1#, 2#, 3#→quenching tank →heat air blowing dry →double-roll rectifying roll(with 4#CPC)→bridle roll Ⅳ→wet skin pass mill →tension leveler →bridle roll V →spraying type passivity →steam drying deviceⅡ→rectifying roll (5# CPC) →storing loopⅡ→rectifying roll (6# CPC) →bridle rollⅥ→Inspection platform →electrostatic oil coater →2-roll pinch device Ⅲ→shear →2-roller pinch deviceⅣ→tension reel →coil unloading car
Technical parameter
|
Material |
Strip thickness |
Strip width |
Process speed |
Coating layer weight |
Energy |
|
Hot rolled and pickled or full hard |
0.25-2.5mm |
350-1530mm |
40-180m/min. |
25-180g/m2 (double sides) |
Electricity and gas | |