Full Hydrogen Bell Annealing Furnace - High Efficiency Heat Treatment by Leading China Suppliers and Factory
Product Introduction
The configuration ratio between the furnace and the heating cover is reduced. The traditional HNX furnace is 2:1 — two HNX furnaces equipped with one heating cover. The ratio is reduced to 1.6:1 due to the extremely short cooling time of the all-hydrogen furnace, which saves floor area and reduces investment.
The use of 100% hydrogen as a protective gas, corrugated inner casing, large gas flow and high-speed burner, combined gas/water cooling and strong convection can increase production by 30% to 40%.
No oxidation phenomenon — due to the realization of reliable two PPm level (millionth) sealing, sufficient washing time and advanced control means, annealed steel coils will not exhibit any oxidation color.
FAQ
❓ What does the 1.6:1 furnace-to-heating-cover ratio mean?
It means that for every 1.6 furnaces, only one heating cover is required. Compared to the traditional 2:1 ratio used in HNX furnaces, this improvement reduces floor space requirements and lowers overall investment costs.
❓ Why is 100% hydrogen used as a protective gas?
100% hydrogen provides superior thermal conductivity and a highly reducing atmosphere, which accelerates heating and cooling cycles while preventing surface oxidation of the steel coils during the annealing process.
❓ How does the all-hydrogen furnace achieve a 30–40% production increase?
The combination of a corrugated inner casing, high-speed burners, large gas flow, and combined gas/water cooling with strong convection significantly shortens the heating and cooling cycle, enabling higher throughput per unit of time.
❓ What is PPm-level sealing and why does it matter?
PPm (parts per million) level sealing refers to an extremely tight sealing standard that limits oxygen ingress to just a few parts per million. This ensures a virtually oxygen-free environment inside the furnace, preventing any oxidation or discoloration on the steel coil surface.
❓ What is the role of the corrugated inner casing in the furnace?
The corrugated inner casing increases the surface area for gas contact, promoting more uniform heat distribution and enhancing convection efficiency. This contributes to faster and more consistent annealing results across the entire steel coil.
❓ Is the all-hydrogen bell-type furnace suitable for high-volume production environments?
Yes. The optimized 1.6:1 furnace-to-cover ratio, combined with shorter cooling times and higher production rates, makes this furnace highly suitable for large-scale, continuous steel coil annealing operations with reduced capital and operational costs.