Project Overview
A leading Vietnamese steel products manufacturer sought to modernize its surface treatment capabilities with a fully automated, environmentally compliant hot dip galvanizing production line. The client required a turnkey solution that could deliver consistent 1,000 tons per year output while adhering to strict environmental regulations and minimizing manual labor.
Our engineering team designed and delivered a comprehensive system integrating three core subsystems: automatic hot dip galvanizing, environmental control, and logistical material handling — all built around the principles of environmental protection, energy efficiency, and manpower reduction.
Client Background
- Location: Vietnam
- Industry: General Steel Products Manufacturing
- Requirement: End-to-end automatic galvanizing line with zero-emission waste treatment
- Production Target: 1,000 tons/year, 3-shift operation (8 hours/shift, 300 working days/year)
The Complete Galvanizing Process
The production line implements a rigorous 8-stage surface treatment workflow to ensure superior coating quality:
| Stage | Process | Function |
|---|
| 1 | Raw Material Inspection | Quality gate for incoming steel products |
| 2 | Degreasing | Remove oil, grease, and surface impurities |
| 3 | Rinsing | Wash away degreasing chemical residues |
| 4 | Pickling | Eliminate rust, mill scale, and oxides |
| 5 | Rinsing | Remove iron salts and residual contaminants |
| 6 | Fluxing | Activate and wet the steel surface for uniform zinc adhesion |
| 7 | Drying | Prevent zinc splash during immersion |
| 8 | Galvanizing | Immersion in molten zinc for corrosion protection |
| 9 | Cooling | Controlled cooling to prevent ash burning |
| 10 | Passivation | Anti-white-rust surface treatment for extended durability |
Key Technology Highlights
- Fully Automatic Environmental Protection System — All waste gas is collected in a closed-loop system, centrally treated, and discharged to meet emission standards, achieving zero emission operations.
- Auto Logistical Control System — Real-time adjustment based on production rhythm, maximizing resource utilization and minimizing idle time across shifts.
- Clean Energy Furnace with Automatic Temperature Control — The zinc pot is heated electrically with precise furnace temperature regulation, extending zinc pot service life significantly.
- Waste Gas & Solid Waste Treatment — Integrated environmental protection treatment ensures healthy production conditions and full regulatory compliance.
Technical Specifications
| Parameter | Specification |
|---|
| Zinc Pot | 4 × 1 × 1 m (Ceramic Pot), Capacity ~26 tons |
| Annual Output | 1,000 tons/year |
| Heating Type | Electrical Heating (Clean Energy) |
| Work Schedule | 3 shifts/day, 8h/shift, 20h/day, 300 days/year |
| Layout | Loop shape, 6.5m span × 36.4m length |
| Max Power | ~500 kW |
| Water Consumption | ~0.01 m³/ton (pH 6.5–8) |
| Compressed Air | 0.6 MPa/cm², 6 m³/h |
Packing & Delivery
Flexible packaging solutions tailored to client needs and shipping method:
- Option A: Plastic wrap with dryer agent
- Option B: Plywood box with plastic wrap and dryer agent
- Option C: Carton with plastic wrap and dryer agent
- Shipping Modes: Sea freight, rail, or air — according to client requirements
Project Results & Value Delivered
By deploying this fully automatic hot dip galvanizing production line, the Vietnamese client achieved:
- Consistent, high-quality galvanized coatings across all general steel products with a standardized 10-stage process
- Significantly reduced manual labor requirements through automated logistical control and real-time production beat adjustment
- Full environmental compliance with closed waste gas collection, centralized treatment, and zero-emission discharge
- Extended equipment longevity thanks to the clean-energy electrical heating system with automatic furnace temperature control
- Operational flexibility with 3-shift scheduling capability, supporting 20 effective working hours per day
Conclusion
This project exemplifies our capability to deliver turnkey hot dip galvanizing solutions that balance productivity, environmental responsibility, and operational efficiency. The Vietnamese client now operates a state-of-the-art facility that meets international quality standards while contributing to sustainable manufacturing practices in Southeast Asia's rapidly growing steel processing sector.
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