Efficiency is key
“Suppose you have an annual throughput of 30.000 tonnes of Zorba with a mere 3% misplacement of material. This results in an annual loss of 900 tonnes of material. In the metal recovery sector, we are talking about millions of euros here”, says Brian Noppe, general manager of Ad Rem. “This is why we focus heavily on the separation efficiency. It solidifies the usefulness of DMS systems as opposed to dry separation systems and strengthens our competitive advantage.”
In the Ad Rem DMS separation plant, materials are separated by means of a flotation drum operating at various densities using Magnetite or Ferro Silicon (FeSi) as a medium. In case of Zorba, a density of 3.0 kg/dm³ is used. The aluminum floats and is ejected out the front of the drum. The sinks, consisting of heavy metals, are transported through the drum and evacuated at the back. Other uses are, for example, the separation of plastics from metals at a density of 1.4 kg/dm³ or the extraction of magnesium at a density of 2.0 kg/dm³.
In an effort to increase the separation efficiency in the DMS process, Ad Rem teamed up with the University of Leuven, Belgium (Campus Group T,KU Leuven). During this project, the material flows inside of the DMS drum were studied. Several parameters such as medium density, flow rate, flow direction, … were introduced into a computer model. “After validation through physical experiments, the computer model was used to simulate adaptations to the drum geometry, resulting in a better, more efficient separation of materials.” states Arne Eggers, Ph. D. Researcher at Campus Group T, KU Leuven.
The project, under the coordination of Maarten Vanierschot, Assistant Professor at KU Leuven, extended over a period of 18 months. It has revealed multiple insights into the separation process. By eliminating so-called “dead zones” inside the drum, where the medium flow was too turbulent, and by repositioning the material infeed, Ad Rem was able to implement these insights into their new drum designs.
This is also the case for the most recently developed system, the “Vulture”. This compact DMS system is running on a density of 3.0 kg/dm³ with the purpose of separating Zorba into aluminium and heavy metals. “With the implementation of the KU Leuven project results, we were able to reduce the aluminium misplacement from 7.1% to 0.3% in one particular drum. For this customer, it will mean an annual gain of 7700 MT of aluminium, or an increase in turnover of 8.7 million euro.”, Brian Noppe says. “Projects like these validate our continuous investments in R&D research, as time and time again it has proven to produce significant results. Because of this, we are confident our technology will remain the superior option for metal recovery for a long time to come.”
About Ad Rem
Ad Rem NV is an equipment manufacturer that was founded by a joint-venture between baling press builder Valvan Baling Systems and recycler Galloo. Active since 2008, the company is a supplier of innovative machines for feeding, treating and separating waste materials.Click here for more information about AD REM NVClick here for related articles and news on Separation and Sorting TechnologySearch for Separation and Sorting Technology manufacturers in our equipment guide
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Ad Rem is a Belgium based joint venture of Group Galloo, one of Europe’s leading recycling companies of ferrous and non-ferrous metals, and Valvan Baling Systems (www.valvan.com), a well known engineering company specialized in the design and the construction of hydraulic presses and peripheral equipment.Based on the technological experiences ...