The furnace is electrically heated wire mesh conveyor type and has been custom designed for bright annealing of carbon steel tubes with the following dimensions:
Outer diameter: 6 to 38 mm
Wall thickness: 0.9 to 4 mm
Length: 6 m
The furnace system comprises charging table, entry vestibule, heating section, cooling section, exit vestibule. The furnace has been designed according to tube size with reference to outer diameter and length of tube. Tubes are passed through furnace (muffle type) on wire mesh conveyor belt. Speed of conveyor belt is variable, which is adjusted or set with respect to size of tubes. Heating is indirect by coil type heaters placed on top and bottom of horizontal suspend muffle.Inert atmosphere (N2) and Reducing type atmosphere (CrNH3 – 25% Nitrogen and 75% Hydrogen) is used for the process. Flow of gas is controlled through the flow meters fixed on the gas panel with back-up of safety features for power failure , low pressure of gas etc.
Source: Seco/Warwick S.A.
ANDRITZ receives final acceptance for pickling line and acid regeneration plant at voestalpine, Austria
International technology group ANDRITZ has successfully completed the supply of a continuous pickling line, acid regeneration plant, acid purification plant, and silicon removal systems to voestalpine in Linz, Austria.
