The new combined primary and secondary dedusting system from Primetals Technologies has been in
full operation at Buderus Edelstahl GmbH in Wetzlar, Germany since February 2015. Following the
original acceptance test in the fall of 2014, the system is now also cleaning the off-gases from two new
ingot casting plants. With a cleaning capacity of 2.4 million working cubic meters per hour, the dedusting
system is among the largest of its kind in the world. It collects and filters the off-gases from all units in
the melting and casting sections of the electric steel plant, as well as the exhaust air from the hall. The
clean gas dust content is less than one milligram per standard cubic meter, which is considerably less
than the legally specified limiting values.