Turnkey 20,000 T/Year Hot Dip Galvanizing Line with Ring Layout and Furnace Oil Heating

Galvanizing a mixed batch of workpieces — poles, frames, brackets, beams and fabricated parts of different sizes — demands a line that never fights the material flow. This 20,000 ton per year hot dip galvanizing line answers that with a ring layout inside an 81 × 15.9 m workshop, a 7.0 × 1.2 × 2.2 m zinc tank, and furnace oil burning as the heat source.

The scope is turnkey: from degreasing and pickling through fluxing, galvanizing, cooling and passivation, one supplier takes responsibility for tanks, crane, heating, control and fume treatment.

1. Degreasing — a 7.0 × 1.3 × 2.2 m tank removes oils and contamination from incoming parts.
2. Acid pickling — three 14.0 × 1.3 × 2.2 m tanks give the dwell time that mixed workpieces need for a clean surface.
3. Fluxing — a 7.5 × 1.3 × 2.2 m flux tank, with a flux de-ironing device and a flux heating system running on recovered flue waste heat.
4. Galvanizing — the 7.0 × 1.2 × 2.2 m zinc tank is heated by furnace oil with high speed pulse technology for uniform temperature across the bath.
5. Water cooling and passivation — two 7.0 × 1.3 × 2.5 m tanks finish the coating and protect the surface.
6. Ring type crane — carries workpieces around the loop so pickling, galvanizing and cooling stay in continuous rhythm.

• No backtracking: the crane travels one direction around the loop, cutting empty travel time and crane conflicts.
• Compact footprint: the complete process fits inside an 81 × 15.9 m workshop without dead zones.
• Scalable rhythm: the ring structure makes it easy to balance cycle times between the three acid tanks and the single zinc tank.
• Safer handling: predictable routes mean fewer crossovers between overhead loads and people on the floor.

Acid fumes are captured inside a closed room measuring 61.0 × 3.8 × 6.5 m and routed to a centralized treatment system, so the plant meets environmental requirements with no overflow. Industrial waste gas is closed-collected rather than diluted into the workshop. An optional fixed zinc smoke collecting and treatment unit can be added for further particulate control.

High speed pulse heating keeps the zinc bath uniform with high thermal efficiency, which translates directly into longer zinc tank life and lower fuel per ton. The new process eliminates the water-washing stage, cutting both capital investment and daily operating cost. Flue waste heat is recovered to heat the flux tank. Maximum electrical load across the line is only 230 kW, with water use of 0.01 m³ per ton.

Tell us your workshop dimensions, workpiece range and target tonnage, and we will lay out a ring-type galvanizing line sized to your plant.