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Homogenization Aspects Continuous vs. Batch in an Integrated Modern Casthouse

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Homogenization Aspects
Continuous vs. Batch in an Integrated Modern Casthouse

Franz Niedermair, Hertwich Engineering GmbH, Braunau, Austria

Track: BILLET PROCESS & EQUIPMENT - Homogenization

ABSTRACT—Continuous homogenizing for extrusion billets has become the accepted standard
and state-of-the-art technology. HE has to date built more than 120 such plants worldwide, which are
processing some two-thirds of the worldwide extrusion billet production. Batch type homogenizing is
still the best suited technology for various alloys which require long holding times, e.g. 4 to 12 hours,
as well as for large-only log diameter production. Again, HE has in recent years supplied several batch
homogenizing plants. Some of these plants have been integrated with a continuous furnace for
optimum billet processing. Topics include: process technology, heating, holding, different types of
coolers; new log support saddle design, exit car, no rolling of logs with focus to good billet surface
finish; automated sawing, packing; high-efficiency batch furnace and cooler with reversing air and
precise temperature regime; integrated continuous/batch homogenizing system for processing a full
spectrum of extrusion billets or varying diameters and alloys.

© 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.