Solutions
Continuous cold-rolled galvanized steel production line (GI)
Category: Solution
Using cold-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: Coil width: 600-1550mm, thickness: 0.2-1.2 (1.5) mm
Cold-rolled low-carbon steel SPCC, SPCD, FH, conforming to JISG3141
Coating type: GI, GA, GF; weight: 60-300g/m2
Product quality: Conforms to GB/T2518-2008
Unit speed: Inlet 0-320mpm, process section 0-240mpm, outlet section 0-320mpm
Annual output: 100,000-400,000tpy
Energy-saving method: Comprehensive utilization of waste gas heat recovery, SUNNY patent
Continuous annealing furnace: Oxidation-free heating (NOF) + full radiant tube heating (RTF), vertical, horizontal or L-shaped
Fuel type: Natural gas, liquefied petroleum gas, mixed gas, coke oven gas and electricity
Welding equipment: Narrow lap seam welder
Degreasing method: Chemical degreasing + electrolytic degreasing + three-stage water rinsing, vertical or horizontal
Zinc pot type: Ceramic induction zinc pot
Air knife: SUNNY patent
Leveler: Four-roll wet leveling, large rolling force 4,000KN
Straightening machine: Two bends and two straightening
Passivation/fingerprint resistance: Cr6+, Cr3+, organic coating, roller coating
Oiling method: Electrostatic oiling
Electrical control system: SIEMENS or ABB AC frequency conversion automatic control system
Industrial automation: SIEMENS or ABB intelligent automatic control system
Main process flow of the unit:

Uncoiling, welding, degreasing, annealing reduction, galvanizing, leveling, straightening, passivation/fingerprint coating, electrostatic oiling, slitting, coiling