Solutions
Continuous hot-dip galvanized steel sheet production line (HGI)
Category: Solution
Using hot-rolled steel as a raw material, a layer of zinc or zinc-aluminum alloy is applied to the surface of the strip steel through hot-dip galvanizing, which has strong cathodic protection performance, making it widely used in various fields such as industry, agriculture and construction, and becoming a widely used coated product today.
Details
Main Features of the Unit:
Raw materials: Steel strip width: 600-1550mm, thickness: 1.5-4.0mm, pickled hot-rolled low-carbon steel coil, oil-free or lightly oiled.
Coating type: GI, GA, GF; Weight: 60-600g/m2
Product quality: Conforms to GB/T2518-2008
Unit speed: Inlet Max200mpm, process section, Max150mpm, outlet section Max200mpm
Annual output: 200,000-400,000tpy
Energy saving methods: Waste gas heat recovery, SUNNY patent
Continuous annealing furnace: Oxidation-free heating (NOF) + radiant tube heating (RTF), horizontal or L-shaped
Fuel type: Natural gas, liquefied petroleum gas, mixed gas, coke oven gas
Welding equipment: Double-roll lap seam welder
Degreasing method: Chemical degreasing + electrolytic degreasing + three-stage water rinsing, horizontal (can be omitted)
Zinc pot type: Ceramic induction zinc pot
Air knife: SUNNY patent
Leveler: Four-roll wet leveling, large rolling force 6,000KN
Straightening machine: Two bends and one straightening
Passivation/Fingerprint resistance: Cr6+, Cr3+, inorganic passivation, roll coating
Oiling method: Electrostatic oiling
Electrical control system: SIEMENS or ABB AC frequency control system
Industrial automation: SIEMENS or ABB automation control system
Main process flow of the unit:
Uncoiling, welding, degreasing (optional), NOF reduction, galvanizing, (alloying), leveling, straightening, passivation/fingerprint resistance, electrostatic oiling, slitting, coiling
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