The project aims to develop and demonstrate a concept for 100% recycling of Zn-containing dust/sludge. The steelmaking industry is constantly improving its recycling rate; though, some materials are still being landfilled due to their chemical contents, mainly zinc (Zn) and its process related restrictions. The project scope is, by pilot plant trials, to verify and optimise the OXYFINES technology for the upgrading of Zn-rich sludge into a recyclable Zn-free product, as well as a Zn-rich dust suitable as a raw material in Zn production. By system analysis the potential benefits, i.e. on material value, energy- and material efficiency, production economy and environment (e.g. CO2) will be identified, with the aim to present the optimal recycling solution.