However, changes to the law mean that it will in future no longer be possible to dump this waste above ground. Combined with the significantly higher metal prices today, recovery and recycling of the dusts that are continuously produced, but also of the dumped dusts, is an economically interesting alternative to underground dumping. EIRICH's dispersing and drying technology enables economical processing.
Everything feasible in a single mixer: For a multi-stage hydrometallurgical process, which, for example, treats waste materials from the smelting of heavy metals, a suspension is first produced from the dumped residues. Inert coarse particles are separated after suspension and thus do not unnecessarily burden the further treatment process. At the end of the process chain, in the same mixer using hot gas a filter cake is convectively dried and granulated dust-free. The granulate is then fed into the smelting process. For high throughput capacities, customers also use two independent mixers at the beginning and end of the process chain.