During municipal waste incineration, ashes and slags containing up to 30 % glass are produced, which have previously been disposed and treated as non‑recoverable waste. With our innovative GLASY system, even the finest glass particles, previously considered contaminated and therefore unrecoverable, can be separated from the slag. The glass-rich fraction is crushed, washed, screened, and freed from metals and other impurities, resulting in a high‑purity secondary raw material. This allows up to 20,000 tones of glass to be recovered each year and returned to the materials cycle, saving CO₂, primary raw materials, and energy. After processing, the recovered glass is so clean that it can be used directly in the glass melting furnace for the production of container glass, such as flint, amber, or green glass. The research and development of high‑quality secondary glass raw materials from incineration residues represents a significant contribution by Brantner to the circular economy.