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Innovative Integrated Plants of Die-Cleaning and Caustic Soda Recovery

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Innovative Integrated Plants of Die-Cleaning and Caustic Soda Recovery: Case History of a Big and Modern European Plant

Walter Dalla Barba, Fabio Vincenzi, Federico Vincenzi, Marcello Rossi,
ITALTECNO S.r.l., Modena, Italy

Track: EXTRUSION EQUIPMENT - Die Heating and Preparation

ABSTRACT—During the last years, extrusion plants have increasingly required new technologies for
the automatic, safe and environmentally friendly cleaning of extrusion dies that even today, in most
systems, is still primitive, dangerous, costly, and manual. At the same time, the market requires, for
the die cleaning process, to reduce costs and have a lower environmental impact. This is why we
developed a new system of recovering the used caustic soda that in traditional processes is usually
disposed of in large quantities after a few days or even after a few hours of work, as it becomes
ineffective for the attack on the aluminum metal once the solution contains more than 80g/l to 90g/l of
dissolved aluminum. Our R&D has effectively responded by developing a fully-automated diecleaning
plant with very low environmental impact that is completely safe, and then a caustic soda
recovery plant, and finally, integrating the two systems into a single one. This presentation will discuss
the case history of one of the largest plants in Europe, Greece, that has acquired the integrated plant
for this process with huge positive results, which will be explained in detail both technically and
economically. Key Words: die cleaning, recovery, automation, ecology, cost reduction, caustic
soda, safety.

© Extrusion Technology for Aluminum Profiles Foundation (ET Foundation). All rights reserved. No part of The Proceedings may be reproduced in any form without the express written permission of the ET Foundation.

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