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Continuous Hot Rolled Galvanized Sheet Production Line (HGI)

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Hot-rolled plate is used as raw material, and 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: 1.5-4.0mm, hot-rolled low carbon steel coil after pickling, no oil or less oil.

Plating type: GI, GA, GF; weight: 60-600g/m2

Product quality: In line with GB/T2518-2008

Unit speed: Inlet Max200mpm, process section, Max150mpm, outlet section Max200mpm

Annual output: 200,000-400,000tpy

Energy-saving method: Waste heat recovery of exhaust gas, SUNNY patent

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

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

Welding equipment: Double rolling lap seam welder

Degreasing form: Chemical degreasing + electrolytic degreasing + tertiary water rinsing, horizontal (can be omitted)

Zinc pot type: Ceramic induction zinc pot

Air knife: SUNNY patent

Finishing machine: Four-roll wet finishing, large rolling force of 6,000KN

Pull straightening machine: Two bends and one straightening

passivation/fingerprint resistance: Cr6+, Cr3+, inorganic passivation, roller coating

Oiling method: Electrostatic oiling

Electrical control system: SIEMENS or ABB AC frequency conversion control system

Industrial automation: SIEMENS or ABB automation control system

The main process flow of the unit:

Uncoiling→welding→degreasing (optional)→NOF reduction →galvanizing→(alloying)→smoothing→straightening→passivation/fingerprint resistance→electrostatic oiling→slitting→coiling