Extrusion International 1-2021

35 Extrusion International 1/2021 CIRCULAR ECONOMY a powerful transmission drive ensures a high output. These two advantages were decisive factors in the design of the entire system. An additional bene fi t is this extruder model’s user and maintenance friendliness. battenfeld-cincinnati specially developed a new processing unit and screw geom- etry for this application. Downstream reactor units then split up themelt delivered by the extruder into its individual components. Blue Alp www.bluealp.nl , www.petrogas.nl , www.renasci.be battenfeld-cincinnati www.battenfeld-cincinnati.com Oil from Plastic Waste High-speed extruder melts and degasses granulate from used plastic Non-recyclable plastic is one of the problems of the present. Various technologies ensure the re-use of plastic products and their separation in waste processing. But the loss rate incurred in this area is still high. In the fi rst place, plastics cannot be recycled and re-used inde fi nitely. Secondly, separation of pure homogeneous materials often presents a problem which leads to large quantities of non-reusable mixed fractions. These are normally burnt or disposed of on land fi ll sites Renasci plant BlueAlp Circle Highspeed Extruder However, latest research fi ndings have opened up a possibil- ity to extract oils and fuels from this no longer usable plastic oncemore. In thisway, thematerial cycle canbe closed again by returning the oils gained by this method to the chemical and petrochemical industries. The Dutch company Petrogas – Blue Alp, domiciled in Eind- hoven, has developed a production plant for this process over several years and commissioned it for Renasci, located in Oostende, Belgium. In this process, the starting material (used plastic) is fi rst collected and shredded, then its ingre- dients are analyzed. Next, undesirable foreign substances are fi ltered out, and the material is dried. By renewed ag- glomeration, a starting material is created in the form of a granulate. This granulate is melted by battenfeld-cincinnati high-speed extruders and degassed via vacuum zones. In this way, vola- tile foreign substances are extracted and pumped off sepa- rately. The high-speed extruder is particularly well suited for this purpose, since its compact design in combination with