Full Hydrogen Bell Annealing Furnace - High-Quality Heat Treatment by China Suppliers and Factory
Product Introduction
🔧 1.6:1
Optimized Furnace Ratio
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, saving floor area and reducing investment.
⚡ 40%
Production Increase
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%.
🛡️ PPm
Zero Oxidation Level
No oxidation phenomenon. Through reliable two PPm level (parts per million) sealing, sufficient washing time and advanced control means, annealed steel coils will not have any oxidation color.
Frequently Asked Questions
❓ What does the 1.6:1 furnace-to-heating-cover ratio mean compared to traditional systems?
Traditional HNX furnaces use a 2:1 ratio, meaning two furnaces share one heating cover. This product improves that ratio to 1.6:1, thanks to the significantly shorter cooling time of the all-hydrogen furnace — reducing space requirements and overall investment costs.
❓ Why is 100% hydrogen used as the protective gas?
100% hydrogen provides superior thermal conductivity compared to nitrogen-hydrogen mixtures, enabling faster and more uniform heating and cooling. This, combined with corrugated inner casing, high-speed burners, and combined gas/water cooling, significantly boosts production efficiency by 30–40%.
❓ How does the PPm-level sealing prevent oxidation of steel coils?
The system achieves a reliable two PPm (parts per million) seal, combined with sufficient gas flushing time and advanced control technology. This ensures that oxygen and moisture levels inside the furnace are kept at an extremely low level, completely eliminating surface oxidation on annealed steel coils.
❓ How does strong convection contribute to the performance of this furnace?
Strong convection enhances heat transfer uniformity throughout the steel coil, ensuring consistent annealing results across the entire batch. It also accelerates the cooling phase, which is a key factor in achieving the reduced 1.6:1 furnace-to-cover ratio and the overall 30–40% production increase.
❓ What types of steel products are suitable for processing with this all-hydrogen furnace?
This furnace is particularly suited for high-quality cold-rolled steel coils where surface quality is critical, such as those used in automotive, home appliance, and precision manufacturing industries. The zero-oxidation process ensures a bright, clean surface finish after annealing.
❓ Does the reduced furnace ratio affect the quality of the annealing process?
No. The optimized 1.6:1 ratio is made possible by the shorter cooling cycles enabled by all-hydrogen technology, not by compromising quality. The annealing quality remains consistent and meets the highest standards, while the reduced ratio helps lower the facility footprint and capital investment required.