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Continuous cold rolled galvanized sheet production line (GI)

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Using cold-rolled sheet as raw material, the surface of strip steel is covered with a layer of zinc or aluminum-zinc alloy by hot-dip coating. It has strong cathodic protection performance, making it widely used in various fields such as industry, agriculture and construction. Today's widely used coating products.

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Main features of the unit:

Raw material: Strip width: 600-1550mm, thickness: 0.2-1.2 (1.5) mm

cold rolled low carbon steel SPCC, SPCD, FH, in line with JISG3141

Plating type: GI, GA, GF; weight: 60-300g/m2

Product quality: In line with 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 heat recovery of exhaust gas, SUNNY patent

Continuous annealing furnace: Non-oxidizing heating (NOF) + full radiant tube heating (RTF), vertical, horizontal or L type

Fuel type: Natural gas, liquefied petroleum gas, mixed gas, coke oven gas and electricity

Welding equipment: Narrow lap seam welder

Degreasing form: Chemical degreasing + electrolytic degreasing + three-stage water rinsing, vertical or horizontal

Zinc pot type: Ceramic induction zinc pot

Air knife: SUNNY patent

Finishing machine: Four-roll wet finishing, large rolling force of 4,000KN

Pull 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 variable frequency automatic control system

Industrial automation: SIEMENS or ABB intelligent automatic control system

The main process flow of the unit:

Uncoiling→welding,→degreasing,→annealing reduction,→galvanizing,→smoothing→stretching→passivation/fingerprint resistant coating→electrostatic oiling→sub-coiling→coiling