Full Hydrogen Bell Annealing Furnace: Leading Technology from China Suppliers & Factory for Heat Treatment Solutions
Product Introduction
The configuration ratio between the furnace and the heating cover is reduced. The traditional HNX furnace is 2:1 — two HNX furnaces are equipped with one heating cover. The ratio of the furnace cover is reduced to 1.6:1 due to the extremely short cooling time of the all-hydrogen furnace, which saves the floor area and reduces the 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) of the seal, enough washing time, and advanced control means, annealed steel coil will not have oxidation color.
Frequently Asked Questions (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. This is an improvement over the traditional 2:1 ratio, reducing both the floor space needed and the capital investment required for the system.
❓ Why is 100% hydrogen used as the protective gas?
100% hydrogen provides superior thermal conductivity and a highly reducing atmosphere, which enables faster heating and cooling cycles, prevents oxidation, and significantly boosts overall production efficiency compared to mixed gas alternatives.
❓ How does the system achieve a PPm-level seal?
The system uses advanced sealing technology combined with sufficient purging (washing) time and precise control mechanisms to achieve a seal at the parts-per-million (PPm) level, ensuring virtually no oxygen or moisture enters the furnace atmosphere.
❓ What role does the corrugated inner casing play?
The corrugated inner casing increases the surface area for gas flow, promoting more uniform heat distribution and stronger convection throughout the furnace. This directly contributes to the 30%–40% increase in production capacity.
❓ Will the annealed steel coil show any discoloration or oxidation marks?
No. Thanks to the PPm-level sealing, controlled purging time, and advanced process controls, the annealed steel coil will exhibit no oxidation color or surface discoloration after the annealing process.
❓ How does combined gas/water cooling improve the process?
Combined gas and water cooling allows for significantly faster and more controlled cooling rates after annealing. This reduces the overall cycle time, which is the primary reason the furnace-to-cover ratio can be lowered from 2:1 to 1.6:1, improving throughput and reducing equipment costs.