The HEPHAESTUS project is built around one key, overarching objective: To develop a set of scalable and tuneable unit operations, to be built as integrated processing plant, featuring the capacity to treat multiple process wastes deriving from primary mineral and metallurgical (primary and secondary) streams. The unit operations are: - Clean-Tech electric furnace, to transform the EAF and AOD dust into metal alloy to be immediately remelted, process supported with streams of fines by-products from the mineral primary extractions (construction, aggregates and dimensional stone) - EZINEX process, to extract the zinc present in the dust of the furnace - Fibre drawing, for mineral wool manufacturing out of the process slag in molten state - Catalytic conversion of CO2 gas into methanol or formic acid - Ammonia-ammonium carbonate (AAC) and methanesulfonic acid (MSA) based hydrometallurgical processes, to produce a recyclable Fe-rich residue and to recover metals (e.g.e.g., ZnS) from EAF dust The project is targeting primarily small-scale applications (order of magnitude 10 k tons waste dust per year), to cope with the typically fragmented European process size. Such scale is matching the waste volumes and differentiation and granting positive environmental AND economic sustainability through the valorisation of different streams of by-products at low operational and capital expenditure, ensuring vast replicability and short ROI Project will be demonstrated in two pilot applications, in Greece and Italy, with the purpose of creating awareness on the business potential and to generate the conditions for a long-term exploitation, leading to meaningful reduction of wastes for the extractive and steel industries.

On 16 March 2023 the EC published the Critical Raw Materials Act (CRMA) proposal that sets “benchmarks along the strategic raw materials value chain and for the diversification of the EU supplies”. By targeting the domestic refining of three “strategic” battery-related CRMs, i.e., Ni, Co and Mn, the CICERO project addresses the second CRMA benchmark: i.e., > 40% domestic processing/refining. To tackle the twin problems of (1) Europe’s dependence on a few third countries (i.e., DRC, Indonesia, China) for the supply of Ni, Co and Mn for our NMC Li-ion battery production, and (2) the fact that these metals are currently produced at a huge cost in terms of environment, health and safety, CICERO puts in place a sustainable, cost-effective refining model for Ni, Co and Mn, and the downstream conversion into “made-in-Europe” NMC cathodes. The CICERO project is the first ever to develop a circular hydrometallurgical Ni, Co & Mn processing/refining scheme that uses methanesulphonic acid (MSA) – a commercial, green, REACH-compliant & affordable acid – rather than H2SO4. CICERO recovers, refines and converts Ni, Co and Mn from domestically available secondary raw materials: (a) post-mining raw materials (sulphide & laterite tailings) and (b) Ni/Co/Mn-bearing intermediates incl. MSP, FeNi, Ni-matte and Mn-anode sludge. To achieve this, CICERO develops a suite of novel metallurgical unit processes for advanced MSA leaching and solution purification, the conversion to battery-grade MSA salts, and the synthesis of NMC cathodes in MSA media, with sound reagent regeneration & iron recovery in line with the Twelve Principles of Circular Hydrometallurgy. This research is supported by advanced thermodynamic & kinetic modelling for solid-liquid & liquid-liquid equilibria relevant for Ni/Co/Mn processing/refining in MSA media. CICERO introduces a new paradigm for metallurgical processing/refining and increases society’s acceptance of, and trust in, sustainable CRM production in Europe.

The European Union has underexploited potential to produce critical raw materials (CRM) and special metals, as stated in the Study on the EU’s list of Critical Raw Materials (2020). Concretely, the battery sector is considered as a key strategic sector for the EU due to the increased use of batteries in different important sectors such as electric mobility. Thus, METALLICO proposal presents a new opportunity for the European Union. It is composed by an strategic consortium along the value chain, including mining and industrial sites with primary and secondary sources of critical and battery metals (Li, Co, Cu, Mn, Ni); experienced partners to pilot novel processes for producing battery-grade materials based on previous projects and activities; industrial and SME end-users in the battery, cement, paint, and ceramic sectors; and partners to demonstrate the social-license-to-operate (including the support of government bodies), sustainability and commercial chances that the solution represents. Worldwide, these battery metals are predominantly in Chile, Australia, South Africa, China, and The Democratic Republic of Congo, representing a high risk for the EU in terms of supply shortage. For example, in the case of Li, the EU import reliance is 87% for lithium concentrates and 100% for refined compounds as there is no domestic refining . METALLICO includes 4 cases studies in the EU to recover: battery-grade Li2CO3 from a primary spodumene/lepidolite/petalite deposit; Co concentrates and battery-grade CoSO4 from a mine secondary resource (CLC); and Cu, Co, Mn, and Ni concentrates from metallurgical slag from a Pb refining company (KHGM) and secondary mine tailings (THARSIS). Upscaling of sustainable and innovative upstream and downstream processes will demonstrate the techno-economic recovery and production of these critical and important metals for the EU.

The CROCODILE project will showcase innovative metallurgical systems based on advanced pyro-, hydro-, bio-, iono- and electrometallurgy technologies for the recovery of cobalt and the production of cobalt metal and upstream products from a wide variety of secondary and primary European resources. CROCODILE will demonstrate the synergetic approaches and the integration of the innovative metallurgical systems within existing recovery processes of cobalt from primary and secondary sources at different locations in Europe, to enhance their efficiency, improve their economic and environmental values, and will provide a zero-waste strategy for important waste streams rich in cobalt such as batteries. Additionally, CROCODILE will produce a first of a kind economically and environmentally viable mobile commercial metallurgical system based on advanced hydrometallurgical and electrochemical technologies able to produce cobalt metal from black mass containing cobalt from different sources of waste streams such as spent batteries and catalysts. The new established value chain in this project will bring together for the first time major players who have the potential of supplying 10,000 ton of cobalt annually in the mid-term range from European resources, corresponding to about 65% of the current overall EU industrial demand. Therefore, the project will reduce drastically the very high supply risk of cobalt for Europe, provide SMEs with novel business opportunities, and consolidate the business of large refineries with economically and environmentally friendly technologies and decouple their business from currently unstable supply of feedstocks.