Full Hydrogen Bell Annealing Furnace

The full hydrogen bell annealing furnace uses hydrogen as the protective gas for heat treatment. Traditional bell furnaces use a mixture of hydrogen and nitrogen as the protective gas for annealing, while in the full hydrogen bell furnace, the medium for heat conduction is 100% hydrogen. Hydrogen is an extremely reactive gas, especially when heated at high temperatures, its flow rate is exceptionally fast. The heat conduction speed of hydrogen is seven times that of nitrogen, and it can directly conduct heat from the radial direction of the steel coil. Hydrogen has a low density, only 1/14 that of nitrogen. Therefore, it can significantly reduce the power consumption of fans and decrease equipment noise. Hydrogen also has reducing capabilities. At high temperatures, it effectively converts oxide residues into water vapor, improving the annealing quality of cold-rolled thin plates.

product details

Product Introduction

1.6:1
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.

40%
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 level
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.

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