The “International Slag Valorisation Symposium” is a benchmark in the domain of slag engineering and zero-waste slag valorisation. The content of the Symposium provides a rich overview of the contemporary trends in the worldwide research and innovation strategies as regards the valorisation of ferrous and non-ferrous slag, fly ash, bottom ash and numerous other high-temperature (metallurgical) residues. Besides the Symposium, two half-day workshops on carbonation technology and inorganic polymer technology for residue valorisation are organized. Registrations for the Symposium and Workshops are open.