Methoden zur Trennung von Flusen aus Shredder-Sandfraktion
Research output: Thesis › Master's Thesis
The goal of processing shredder light fraction on the one hand is to reduce the amount of waste to be landfilled, strictly obeying the recycling rates given in legal regulations. On the other hand the process has to be profitable. Various methods (e.g. the VW SiCon process, developments of the TBS-related processing systems GmbH, the Scholz method) were developed. In the course of processing shredder light fraction the so-called shredder sand remains as a sink of contaminants. The appreciable amount of valuable matter (e.g. copper) contained is not made use of yet. The biggest challenge in recovering the valuable materials by physical separation methods is the so called lint fraction. The partly heavily contaminated textile and plastic fibres tend to form agglomerates with the residual components as e.g. copper wires, elastomers and glass, thus limiting the efficiency of current physical separation methods. Within this master thesis the method of property analysis was used to characterize a sample of shredder sand, combining laboratory separation techniques at monotonously increased property settings with chemical assays. Various physical techniques to separate the lint fration were examined at laboratory scale. The technical restrictions of the efficiency of spiral separators fed with shredder sand were elaborated at pilot scale. A pluralistic approach of dry separation of the lint fraction by means of an air jig and wet processing of the residuals by tabling and sluicing is discussed on the base of metal balances with respect to an overall economic and ecologic use of the products.
|Translated title of the contribution||Methods for the separation of lint from shredder sand fraction|
|Award date||27 Jun 2014|
|Publication status||Published - 2014|