South African Client Installs Customized ISO9001 Zinc Tank for 20,000 Tons/Year Hot Dip Galvanizing Line

A prominent South African steel processing manufacturer required a large-scale, ISO9001-certified hot dip galvanizing solution to meet growing industrial demand. The client needed a customized zinc tank system capable of handling 20,000 tons per year of diverse workpiece types, all while adhering to strict environmental and energy-efficiency standards. Our team delivered a complete turnkey solution centered around a massive 7.0 * 1.2 * 2.2 m zinc kettle with advanced high-speed pulse combustion heating technology.

• Location: South Africa
• Industry: Steel Processing & Surface Treatment
• Workshop Size: 81 * 15.9 m
• Production Target: 20,000 tons/year
• Workpiece Types: Diversified steel components
• Certification Required: ISO9001

The project follows three core design principles: energy saving & environmental protection, technology leadership, and reliable quality at cost-effective pricing.

The combustion system is placed in a diagonal position within the furnace, allowing heat to continuously surround the zinc kettle from both sides. The combustion engine delivers an output power of 1170 M/sec or higher, ensuring rapid, uniform heating. This significantly improves thermal efficiency and extends the zinc tank's service life.

Thermocouples are strategically installed in the gas pass and zinc kettle, feeding real-time data to the control system as scientific parameters. The combustion engine automatically cycles on and off without manual intervention, eliminating human error and ensuring precise temperature regulation. The system provides full-process real-time data monitoring, fault diagnosis, and alarm functionality.

Advanced acid concentration testing equipment enables continuous monitoring of the acid bath state, allowing operators to adjust the production rhythm dynamically for optimal pickling performance.

All industrial waste gas is collected in a closed system and centrally treated to meet environmental discharge standards with zero overflow, ensuring full regulatory compliance.

A proprietary new process eliminates the need for intermediate water washing steps between certain stages, reducing both capital investment and ongoing operating costs.

High-efficiency zinc dust collection with minimal maintenance requirements and compact footprint — available as an optional enhancement.

Additional Equipment Included: Galvanizing tank heating & control system, ring-type crane, acid fume collection & treatment system, fixed zinc smoke collecting & treatment equipment (optional), iron removal from flux equipment, flux heating system (utilizing flue waste heat), and water cooling system.

• Maximum Electrical Power: 230 kW
• Water Consumption: 0.01 m³/ton (supply pressure min 0.2 MPa)
• Water pH Range: 6.5 – 8 (tap, river, or well water acceptable)
• Heating Fuel: Furnace Oil Burning
• Compressed Air: 0.5 MPa/cm², 3 m³/min
• Production Layout: Ring Layout

By deploying this customized ISO9001 hot dip galvanizing line, the South African client achieved:

• Massive 20,000-ton annual throughput capable of handling diversified steel workpiece types on a ring-layout production line
• Superior energy efficiency via high-speed pulse combustion heating that uniformly surrounds the zinc kettle, extending equipment life
• Fully automated temperature control with real-time thermocouple monitoring, eliminating manual operation errors
• Reduced operating costs through the water-free process technology that eliminates intermediate rinsing stages
• Complete environmental compliance with closed-loop waste gas collection and centralized treatment meeting all discharge standards
• Comprehensive service support including investment scheme planning, factory layout design, equipment foundation drawings, on-site installation & commissioning, and professional technical training for local staff

This large-scale project demonstrates our expertise in delivering ISO9001-certified, fully customized hot dip galvanizing solutions for the African industrial market. With a 7-meter zinc kettle, high-speed pulse combustion, intelligent automation, and water-free processing, the South African client is now equipped with one of the most advanced galvanizing facilities on the continent — balancing high-volume output with environmental responsibility and operational excellence.