Full Hydrogen Bell Annealing Furnace from China Suppliers - High Efficiency Factory Equipment for Heat Treatment
Product Introduction
1.6 : 1
Furnace-to-Cover 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. Due to the extremely short cooling time of the all-hydrogen furnace, this ratio is reduced to 1.6:1, saving floor area and reducing investment.
40%
Production Increase
The use of 100% hydrogen as a protective gas, combined with a corrugated inner casing, large gas flow, high-speed burner, combined gas/water cooling, and strong convection can increase production by 30% to 40%.
PPm
Oxidation-Free Sealing
No oxidation phenomenon — achieved through reliable dual PPm-level (parts per million) sealing, sufficient purging time, and advanced control systems. Annealed steel coils will not exhibit any oxidation discoloration.
Frequently Asked Questions
What does a 1.6:1 furnace-to-heating-cover ratio mean?
A 1.6:1 ratio means that for every 1.6 furnaces, only one heating cover is required. Compared to the traditional 2:1 ratio used by standard HNX furnaces, this optimized ratio is made possible by the significantly shorter cooling time of the all-hydrogen furnace, reducing both footprint and capital investment.
Why is 100% hydrogen used as a protective gas in the all-hydrogen furnace?
100% hydrogen provides superior thermal conductivity compared to mixed gases, enabling faster and more uniform heating and cooling of steel coils. This directly contributes to the 30%–40% increase in production efficiency while maintaining high-quality annealing results.
How does the corrugated inner casing improve furnace performance?
The corrugated inner casing increases the surface area inside the furnace, promoting better gas circulation and heat transfer. Combined with large gas flow and high-speed burners, it enables strong convection that significantly boosts heating and cooling efficiency.
What is PPm-level sealing and why is it important?
PPm (parts per million) level sealing refers to an extremely tight sealing standard that limits oxygen or moisture ingress to just a few millionths. This dual PPm-level seal ensures a fully controlled atmosphere inside the furnace, preventing any oxidation or discoloration on the surface of annealed steel coils.
How is oxidation prevented during the annealing process?
Oxidation is prevented through a combination of reliable PPm-level dual sealing, sufficient hydrogen purging time before heating begins, and advanced process control systems. These measures ensure the internal atmosphere remains free of oxygen throughout the entire annealing cycle.
What are the main advantages of the all-hydrogen furnace over traditional HNX furnaces?
The all-hydrogen furnace offers several key advantages: a reduced furnace-to-cover ratio (1.6:1 vs. 2:1) that lowers space and cost requirements, a 30%–40% improvement in production capacity, and a fully oxidation-free annealing process thanks to PPm-level sealing and 100% hydrogen atmosphere control.