Full Hydrogen Bell Annealing Furnace - China Suppliers & Factory for Enhanced Heat Treatment Efficiency
Product Introduction
The configuration ratio between the furnace and the heating cover is reduced. The traditional HNX furnace is 2:1, that is to say, 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, advanced control means, annealed steel coil will not have oxidation color.
Frequently Asked Questions
❓ What does the 1.6:1 furnace-to-heating-cover ratio mean compared to traditional HNX furnaces?
The traditional HNX furnace uses a 2:1 ratio, requiring two furnaces per heating cover. Thanks to the extremely short cooling time of the all-hydrogen furnace, the new design reduces this ratio to 1.6:1, resulting in a smaller footprint and lower overall investment costs.
❓ Why is 100% hydrogen used as a protective gas in the all-hydrogen furnace?
100% hydrogen provides superior thermal conductivity and heat transfer efficiency compared to mixed gases. Combined with the corrugated inner casing, large gas flow, and high-speed burner, it enables significantly faster heating and cooling cycles, boosting production capacity by up to 40%.
❓ How does the system prevent oxidation of the annealed steel coil?
The system achieves a reliable two PPm (parts per million) level seal, ensuring an extremely low oxygen environment inside the furnace. Combined with adequate purging time and advanced process controls, the steel coil surface remains completely free from oxidation discoloration.
❓ What cooling methods are used in the all-hydrogen furnace?
The all-hydrogen furnace employs a combined gas and water cooling system along with strong convection circulation. This dual cooling approach dramatically reduces the cooling cycle time, which is the key reason the furnace-to-cover ratio can be lowered from 2:1 to 1.6:1.
❓ What are the main advantages of switching to an all-hydrogen furnace from a traditional HNX furnace?
The key advantages include a more compact layout (1.6:1 ratio), up to 40% higher production output, elimination of surface oxidation through PPm-level sealing, and reduced capital investment due to fewer heating covers required per furnace unit.
❓ What role does the corrugated inner casing play in the furnace design?
The corrugated inner casing increases the effective surface area for heat exchange, allowing for more efficient gas flow and heat distribution around the steel coil. This structural feature directly contributes to the enhanced production rate of 30%–40% compared to conventional designs.