Project Name: 1.0-2.5×400mm Continuous Galvanizing Production Line  

Client Name: Tianjin Qiyi Industry and Trade Co., Ltd.  

Project Nature: New Construction Project  

Undertaking Method: General Contracting by Jingjie Ruisi  

Signing Date: October 19, 2012  

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), low-calorific-value gas radiant tube heating furnace (ZL2009202466829), 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 ∮800-1700mm  

Coil Weight: Max 8000 Kg  

Strip Dimensions: Thickness 1.0-2.5mm, Width 230-450mm  

III. Raw Material Specifications  

Material: Q235, Q195, Q215, 08AL  

Thickness: 1.0-2.5mm  

Width: Max 450mm  

Coil Weight: Max 8000 Kg  

Inner Diameter: ∮508mm  

Outer Diameter: ∮800-1700mm  

IV. Production Line Process Parameters  

Process Speed: 36~90m/min (Transmission Speed: 100 m/min), TV value is 85  

Looper Filling Speed: 130% of the process speed  

Power Configuration of Transmission System: AC variable frequency speed regulation  

Zinc Coating Thickness Adjustment Range: 35~200g/㎡ (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 left to right (viewed from the operation side)  

V. Main Equipment Arrangement According to Process Flow:  

1#, 2# Feeding Car → 1#, 2# Uncoiler → 1#, 2# Uncoiling Knife → 1#, 2# Uncoiling Pinch Roll → Hydraulic Cross Cut Shear → Welding Platform → Tension Machine 1 → Entry Looper (two sets of single-roll manual centering) → 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 → Cooling Tower Deflector Roll → Quenching Tank → Squeegee Roll → 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) → 1#, 2# Coiler (EPC) → 1#, 2# Discharging Car  

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