Hertwich to supply compact remelt plant for aluminium billets to SuperAlloy in Taiwan

Hertwich Engineering, a part of SMS group won a contract to supply compact remelt plant for aluminium billets to SuperAlloy Industrial CO. Ltd. (SAI), located in Dou-Liu City, Taiwan. The remelt plant is designed to remelt aluminium billets in sizes up to maximum 305mm diameter and 7,000mm length. The plant would have a capacity of 40,000tpy and shall be commissioned in September 2017.

SuperAlloy Industrial Company Ltd is an internationally renowned supplier to the automobile and aviation industries operating since 1994. The company specializes in manufacturing forged aluminium wheels for premium and sports cars and aircraft seats and more recently they have added aluminium chassis components to their product portfolio. The company supplies to Europe, the U.S.A. and Japan.

By investing in a modern compact remelt plant SAI is creating an internal recycling circuit that includes every step from scrap melting, through casting, quality control and up to packaging and consignment of the basic material to be re-used.

Hertwich Engineering developed the concept of the compact remelt plant in the 1980s and since then has adapted it continually to cater to customer requirements. Recently, the U.S. American extrusion plant Service Center Metals (SCM) has installed its second Hertwich remelt unit in their facility.

Hertwich designs the compact remelt plant in such a way that it combines all the recycling work steps in a fully automated space-saving unit that operates continuously.

The plant briefly covers the following steps:

• Recycling material is prepared in chutes and transferred into the pre-heat chamber of the furnace by a special charging machine.
• Machining chips are fed into the furnace via a chip-pre-treatment plant and a high-speed co-flow dryer.
• The scrap is melted in a three-chamber melting and casting furnace with a capacity of seven tons per hour. The melt passes through a partition wall into the casting chamber for further casting.
• The melt is degassed, filtered and then fed to two horizontal continuous-casting units arranged in parallel. A separate cooling water treatment plant provides the cooling water for casting. After solidification, the cast strands are cut into billets by a flying saw and then deposited on the entry magazine of the homogenizing furnace. A continuous homogenizing plant with cooling station homogenises the billets.
• Cooled down billets are placed on a conveyor and inspected for internal cracks and inclusions by a testing unit.
• The inspected billets are semi-automatically strapped, weighed, and ready for shipment.

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