The primary material used in NF separation arises during the processing of scrap in shredders and refuse incineration plants. As these fractions contain many valuable metals such as copper, brass, aluminium and zinc, processing the material makes sense both ecologically and economically.
Technical process
Dry separation of waste and metal is possible by means of separation via electronic current. Certain metals, e.g. VA, are blown into a downstream optoelectronic sorting unit (Optronic) from the metal fraction which is then further separated into various metal fractions within the framework of a dual-level sink-float plant using dense media.
This process takes advantage of the varying specific densities of individual materials. The lighter metals float in the dense media while heavier metals sink and are directed to the next density process. In order to comply with the high quality requirements specified by metallurgical plants, the processes must be subjected to continuous controls. High-quality primary products for the automobile industry and engineering are manufactured from the recycled metals in aluminium smelting plants and other steelworks.
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