NKK- HITACHI Continuous Galvanizing Line with Skin Pass Mill

The Continuous Galvanizing Line No. 3, built in 1983 by NKK-Hitachi, offers a production capacity of 300,000 tons per year, processing low carbon steel coils with widths ranging from 610 to 1,300 mm and thicknesses of 0.27 to 2.3 mm. The line operated until March 2019.

This left-hand line includes advanced features such as a high-capacity furnace, air knife wiping system, and a skin pass mill for superior surface quality. The line's equipment is designed for maximum coil weights of 45,500 kg and speeds up to 200 mpm. Its robust configuration, including multiple bridle rolls, deflector rolls, and chemical treatment tanks, ensures efficient galvanizing.

The line's modern furnace output reaches up to 50 tons per hour, making it a high-performance solution for large-scale steel galvanizing operations.

Make: NKK-HITACHI
Year of manufacture: 1983
Mothballed since: Ceased production in March 2019
Production capacity: 300,000 tons per year
Line length: 235 meters approximately
Line direction: Left to right (left-hand line)
Processed material: Carbon steel
Strip width: 610 – 1,300 mm
Strip thickness: 0.27 – 2.3 mm
Strip length: 1,200 meters
Coil weight: max. 45,500 kg
Line speed: up to 200 mpm
Furnace output: max. 50 tph
Zinc pot: 2,600 x 5,850 mm liquid level
4,071 mm depth

Air knife (wiping) system:
Fixed nozzle gap
0 to 10° (downward) nozzle angle
1,500 mm nozzle effective width
0 – 80 mm nozzle opening/closing
2 mm/sec opening/closing speed
10 mm/sec lifting speed
45-100% airflow adjustment
20 - 250 g/m² per side zinc coating weight
7,000 Nm3/h blower capacity
2 kg/cm² pressure
Coke oven gas combustion exhaust injection gas

Skin pass: 4-Hi non-reversible
500 tons rolling force

Tension reel: Carrousel type

***A more detailed description of the line and scope list is available on demand.