Metallurgy is one of the biggest producers of solid wastes: Last year, aluminium smelters produced globally <1.5 Mt of spent pot lining (SPL), a hazardous material. Al industry pays €520-1.560 million annually for managing this waste with processes with no added-value. Ferroalloys production generates wastes mainly in the form of slag, whose further treatment is both not optimized and expensive. Fe-Si slags are commonly applied in the production of cementitious materials, but cement as binding material has severe environmental disadvantages: each ton of produced cement releases approx. 1 ton of CO2, making the cement industry responsible for 8% of the global CO2 emissions. Consequently, there is an urgent need to minimize the usage of cement. AlSiment aims to to recycle 100% of metallurgy wastes into a new raw material valuable for industrial applications, and achieve agreements with metallurgical industries interested in adopting our technology. AlSiment aims to close the Al- and Fe-Si cycles with process where no waste is generated, eliminating their hazardous nature, facilitating their transportation and providing a cheap, environmentally-friendly raw material to the energy intensive industry and insulating industry.