CHROMIC Project Final Conference will take place as online event

4 November 2020 EventsNews

We are pleased to invite you to the final online conference of the CHROMIC project, which will take place as an online event on 19 November 2020 at 10 am.

Creating a circular economy – where all resources are kept at the highest possible level of functionality and value at all times – is key to building a sustainable future, where innovation and economic growth can happen without further depleting the planet’s resources.

The CHROMIC research project – funded by the European Commission through the Horizon 2020 programme – aimed at creating building blocks of such an economy, focussing in particular on the metal industry. Over four years of work, It has investigated the selective recovery of  Chromium (Cr), Vanadium (V), Molybdenum (Mo) and Niobium (Nb) from metallurgical slags. These four metals are crucial for the competitiveness of the manufacturing sector and the innovation potential of high-tech sectors. Ensuring their steady supply is of strategic importance for the European industry.

During the conference, the CHROMIC partners will present the project results both at process and flowsheet level – from the preparation of the slags to their treatment, up to the purification of the final product and the valorisation of the residue.

These are all important first steps towards a true circular economy for the metals studied in CHROMIC, as well as for other critical raw materials.

The conference will also present the results of the economic, environmental and health & safety assessment of the processes studied and materials produced, as well as of participatory events (workshops and focus groups) that allowed CHROMIC to collect the views and expectations of European citizens about the occupational, environmental and health aspects of metal production and recovery. At the end, an interactive Q&A session will allow participants to share their perspective on the project.

Please register at this link:

in order to attend the conference.

Please feel free to forward this invitation to your colleagues and contacts.

We are looking forward to meeting you online – in the meantime do not hesitate to contact us if you need more information.


19 November 2020


Introduction – CHROMIC concept, goals and key results


Preparing the slags for further treatment through physical separation

This session will show how a combination of magnetic and density separation can up-concentrate Cr in an enriched fraction, while producing also metallic particles for direct reuse. Concentration of Cr is increased up to 3 times, while simultaneously reducing the amount of material to be leached.  


Getting what we want, and only what we want: selective metal extraction from steel slags

Selective alkaline leaching was chosen to extract metal from slags and make reuse of the residual matrix possible, avoiding the generation of large amounts of new waste streams. Different methods were evaluated, with traditional roasting allowing leaching rates of 100% for Cr and 33 % for V. Microwave roasting offers slightly lower rates, but is faster and more energy-efficient. 


Purification and up-concentration to metal products 

This session focusses on the separation and enrichment of the target elements from the leachates, and the transformation into final products. Two flowsheets will be presented: in one, with precipitation as a final step, a 99.99% removal of Cr with a purity of >99% was achieved. In the other, electrocoagulation resulted as a final step resulted in a complete removal of Cr.


Putting it all together – flowsheet integration and validation

The final step was to combine and upscale the best lab techniques identified in the three previous ones. Thanks to this process, from complex, low-grade waste streams, it could possible to recover more than 25,000 t Cr/year in Europe. Moreover, the residual matrix can still be carbonated for its valorisation as a construction material.


Is it worthwhile? Integrating economic, environmental and health and safety assessment 

Throughout the project, the economic, environmental and health and safety aspects of the processes studied and materials produced were assessed. When compared to current standard technologies, the economic viability and environmental friendliness of the integrated flowsheets strongly depends on the value of the starting material and the potential valorisation of the residual matrix materials.


Metals and the circular economy: what do the people think?   

Through three series of participatory events involving different stakeholders in four European countries, the CHROMIC project has gauged the level of knowledge, expectations and concerns of ordinary citizens, professional stakeholders and students when it comes to reinventing the metal value chain and orient it towards a circular economy. 



Interactive session – Q & A 

12:00 End of event

This project received funding from the European Union’s Horizon 2020 Research and Innovation program under Grant Agreement n° 730471

effiCient mineral processing and Hydrometallurgical RecOvery of by-product Metals from low-grade metal contaIning seCondary raw materials