Considerable energy savings and increases in melting rates can be achieved by upgrading old coreless induction furnaces, and especially by converting them to advanced converter technology. At the same time, downtimes and maintenance and repair of the systems are reduced. As the investment costs only represent a quarter or a third of the costs of new equipment and the implementation often takes no longer than a week, there are other advantages as well.
This is backed up by numerous projects successfully realized by OTTO JUNKER in recent years.
Tables 1 and 2 show the economic and technical effects on the basis of two examples.
The upgrading projects already implemented have shown that:
Converting mains frequency systems to medium-frequency systems brings about energy savings of 8 % (for cast iron), and another 10 % can be saved if a higher power density is realised.
Replacing old converter systems (quintuplers etc.) by advanced medium-frequency switchgear cuts power consumption by 12 to 20 %.
Converting a monomelt into a tandem system (using a second furnace) yields throughput increases of 30 %.
Converting to a modern PLC-based control system with the JOKS melting processor reduces downtimes and cuts energy consumption.
Using the Optical Coil Protection System (OCP) improves the safety and reliability of the equipment and consequently reduces downtimes.
Interested? You can read the complete article in "Technical Reports" on this page!
For additional information, please contact:
Dr. Dietmar Trauzeddel, Senior Engineer for Technology and Marketing,
OTTO JUNKER GmbH, Simmerath
Phone +49 2473 601-342, Fax +49 2473 601-637,