Project Name: 0.3-0.8×650mm Continuous Galvanizing Production Line  

Client Name: Zhejiang Xinhe Pipe Industry Co., Ltd.  

Project Nature: New Construction Project  

Undertaking Method: General Contracting by Jingjie Ruisi  

Signing Date: April 26, 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, 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 (blast furnace 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 ∮800-1800mm  

Coil Weight: Max 10000Kg  

Strip Dimensions:  

- Thickness: 0.3-0.8mm  

- Width: Max 650mm  

III. Raw Material Specifications  

Material: Q235, Q195, Q215, 08AL  

Thickness: 0.3-0.8mm  

Width: Max 650mm  

Coil Weight: Max 12000Kg  

Inner Diameter: ∮508mm  

Outer Diameter: ∮800-1800mm  

Unit Direction: Left-in and right-out  

IV. Production Line Process Parameters  

Process Speed: 30~150m/min  

Looper Filling Speed: 130% of the process speed  

Power Configuration of Transmission System: AC variable frequency speed regulation  

Zinc Coating Thickness Adjustment Range: 60~280g/m² (double-sided) adjusted by air knife  

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

Passivation Method: Dip coating passivation  

Product Quality Standard: GB2518-2008  

V. Description of Process and Equipment Functions  

The main equipment is arranged according to the process flow as follows:  

1#, 2# Feeding Car → 1#, 2# Uncoiler → 1#, 2# Uncoiling Knife → 1#, 2# Uncoiling Pinch Roll → Hydraulic Cross Cut Shear → Automatic Welder → Pinch Machine → Tension Machine 1 → Entry Horizontal Looper → Double Roll Centering (CPC) → Tension Machine 2 → Pretreatment → Tension Machine 3 → Single Roll Centering Machine → Roller Table → Single Roll Centering (CPC) → Tension Machine 4 → Tension Meter → Pre-furnace Support Roll → Annealing Furnace → Hot Tension Roll → Furnace Nose → Zinc Pot → Three-roll Six-arm Device → Air Knife → Cooling Fan → Cooling Tower Centering (Single Roll) → Cooling Tower Deflector Roll → Quenching Tank → Squeegee Roll → Double Roll Centering (CPC) → Tension Machine 5 → Reserved Skin Pass Mill → Tension Leveler → Tension Machine 6 → Dip Coating Passivation → Hot Air Drying → Exit Looper → Double Roll Centering (CPC) → Tension Machine 7 → Hydraulic Cross Cut Shear → 1# Coiling Pinch Roll (Guide Plate) → 1# Coiler (EPC) → 1# Coil Assist Device (Vertical) → 1# Discharging Car → 2# Coiling Pinch Roll (Guide Plate) → 2# Coiler (EPC) → 2# Coil Assist Device (Vertical) → 2# Discharging Car  

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