The hot dip galvanized steel sheet to be cleaned will be immersed in the dissolved zinc pot after reduction annealing to make the surface adhere to a layer of zinc or zinc-aluminum alloy thin steel sheet to improve the corrosion resistance of the steel sheet.Hot dip galvanized steel is mainly used in construction, home appliances, automobiles, machinery, electronics, light industry and other industries.
Line Main Properties :
1. Line Type : horizontal, vertical, combination of vertical and horizontal
2. Specification / Thickness : cold rolled strip / min. 0.12mm, max. 2.5mm
hot rolled strip / min. 1.5mm, max. 5mm
Width : min. 550mm, max. 1500mm
3. Speed in Process Section: max. 200m/min (240m/min for GL)
4. Continuous Annealing Furnace:
Furnace Type: horizontal, vertical, combination of vertical and horizontal (L type) Heating Method: Gas non-oxidation heating (NOF), Gas radiant tube heating (RTF), Electric radiant tube and electric resistance tape heating Cooling Method: Shielding gas regular air jet cooling, rich hydrogen high speed air jet cooling
5. Zinc pot: jet flow ceramic induction zinc pot (GL line with pre-melting pot)
6. Air knife: single injection advanced air knife, multi-cavity air knife
7. Skin Pass Mill: 300T-800T, 4-roll wet skin pass
8. Energy saving method: high efficiency radiant tube combustion air heat exchanger, fume duct combustion air heat exchanger, fume duct hot air and hot water heat exchanger, hot shielding gas recycle injection pre- heating strip, fume heat radiant before non-oxidation heating pre-heating strip, light fiber furnace lining
We provide hot-dip galvanizing line with American-Steel-Union process, which can produce sheet with small spangles or without spangles. The product has good performance of corrosion resistance and coating adhesion, used widely for manufacture of automobile, household electric appliance, building construction and base plate for color coating etc.
Technology Parameter
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