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Steinert to present aluminium alloys sorting system for recyclers at Aluminium 2016

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Cologne, Germany-based Steinert has introduced the LSS (laser sorting system), which it says allows aluminium alloys to be separated from one another. Steinert will present the LSS sorting system during a speech at Aluminium 2016 Thursday, 1 December 2016 at noon. The event will be at Stand 11J75 in Hall 11 of the Messe Dusseldorf convention centre.

The auto body panel stamping process generates up to 50 percent scrap, which is a valuable resource that, for economic and ecological reasons, should be kept within the production cycle, the company says. For this to happen, however, it is necessary to presort the scrap by alloy type.

“The recognized state of the art until now has been the dry mechanical separation of 2xxx and 7xxx aluminium alloys with higher copper or zinc contents by means of Steinert XSS T ( X-ray transmission),” says Uwe Habich, technical director at Steinert.

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However, the separation of aluminium scrap by alloy groups 1xxx to 7xxx has not been practical because an in-line sorting technique has not been available. “Our Steinert LSS (laser sorting system), which uses the latest LIBS technology, now makes this possible and amplifies the sorting process,” Habich says.

Karl Hoffmann, business development manager at Steinert, says the company developed the system because “the increased use of rolled aluminium products in the automotive industry (5xxx series and 6xxx series alloys) will quickly create large amounts of new scrap that need to be sorted or separated according to alloy series. Moreover, the demand for recycled aluminium is increasing at the same time. As a sorting specialist, we are responding to this development with the in-line Steinert LSS, which features the latest LIBS (laser-induced breakdown spectroscopy) technology.”

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With its new sorting technology, Steinert is mainly addressing processors of new scrap or production scrap. Such companies are basically interested in a type-specific purification of the alloys, because material sorted by type can be sold at a premium. Meanwhile, Steinert says it is negotiating with a metal recycler that receives fabrication scrap concerning a pilot operation for production-relevant throughputs.

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For metal recyclers, Steinert says this sorting process can pay for itself financially in a relatively short time. According to data from metal recyclers, proceeds between €300 and €400 per tonne can be obtained by sorting the aluminium scrap into pure fractions. This compares with sorting costs of €20 to €30 per tonne when using sensor-assisted equipment.

Steinert says its unit achieves an output of several tonnes per hour. “Yet, even with an output of just 1 tonne per hour, with €300 of additional proceeds and an operating time of 8,000 hours per year, the additional proceeds amount to €2.4 million,” Habich says.

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