Project Name: 1.5-3.0×500mm Continuous Galvanizing Production Line  

Client Name: Shandong Hengji New Materials Co., Ltd.  

Project Nature: New Construction Project  

Undertaking Method: General Contracting by Jingjie Ruisi  

Signing Date: April 20, 2013  

Commissioning Status: Under Construction  

Operation Status: Good  

I. Basis for Technical Scheme  

This technology is based on the internationally popular Sendzimir method "principle of continuous hot-dip galvanizing for steel strips". Combining our company's past successful experience in the hot-dip galvanizing field and successful galvanizing cases using blast furnace gas, it adopts a combination of multiple mature patented technologies independently developed by our company, including regenerative non-oxidation technology (Patent No. ZL2009202466509), energy-saving radiant tube technology (Patent No. ZL2010205353153), process heat energy recovery technology (Patent No. ZL2009202466617), and energy-saving furnace rolls (Patent No. ZL2010205353007). It is designed in accordance with the user's actual situation and the principles of economy, reliability, and maintainability.  

II. Product Specifications  

Steel Grade: Ordinary Carbon Structural Steel  

Material: Q235, Q195, Q215, 08AL  

Steel Coil: Inner Diameter ∮508mm, Outer Diameter ∮800-1800mm  

Coil Weight: Max 7000 Kg  

Strip Dimensions: Thickness 1.5-3.0mm, Width 280-500mm  

III. Raw Material Specifications  

Material: Q235, Q195, Q215, 08AL  

Thickness: 1.5-3.0mm  

Width: Max 500mm  

Coil Weight: Max 7000 Kg  

Inner Diameter: ∮508mm  

Outer Diameter: ∮800-1700mm  

IV. Production Line Process Parameters  

Process Speed: 26~53m/min, TV value is 80  

Looper Filling Speed: 150% of the process speed  

Power Configuration of Transmission System: AC variable frequency speed regulation  

Zinc Coating Thickness Adjustment Range: 40~200g/㎡ (double-sided) adjusted by air knife  

Zinc Coating Status: Regular spangle, small spangle, spangle-free  

Passivation Method: Dip coating passivation  

Product Quality Standard: GB/T2518-2008  

Production Line Direction: From right to left (viewed from the operation side)  

 V. Main Equipment Arrangement According to Process Flow:  

1#, 2# Feeding Car → 1#, 2# Uncoiler → 1#, 2# Uncoiling Knife → Uncoiling Pinch Roll → Five-roll Straightener → Hydraulic Cross Cut Shear → Welding Platform → Tension Machine 1 → Entry Looper → Tension Machine 2 → Double Roll Centering (CPC) → Dancing Roll → Annealing Furnace → Furnace Nose → Zinc Pot → Sink Roll → Air Knife → Cooling Fan → High Tower Centering Machine → High Tower Deflector Roll → Quenching Tank → Quenching Squeezer → Double Roll Centering (CPC) → Tension Machine 3 → Leveler → Tension Machine 4 → Dip Coating Passivation → Hot Air Drying → Exit Looper → Tension Machine 5 → Hydraulic Cross Cut Shear → Coiling Pinch Roll (Guide Plate) → Coiler (EPC) → Discharging Car (Weighing position reserved)  

Continuous operation is realized through the electronic control system, hydraulic system, pneumatic system and auxiliary equipment.