Mineral carbonation from metal wastes Ef

This study investigates the mineral carbonation process using metal wastes, specifically evaluating the effect of the solid to liquid (S/L) ratio on the efficiency and characteristics of the carbonated products formed. The primary objective was to determine how varying S/L ratios influences the carbonation efficiency of steel, phosphorus, and blast furnace slags as feedstock. The methodology involved conducting carbonation experiments at different S/L ratios and subsequently characterizing the final products formed. The results indicate that the efficiency of the carbonation process improves for all three materials as the S/L ratio decreases. Moreover, it was observed that the silica from the raw materials did not dissolve during the process and served as the core of the final carbonated particles. Additionally, calcium sulfate (CaSO4) resulting from incomplete carbonation also formed part of the core of these particles, while calcium carbonate (CaCO3) was deposited on the surface. These findings highlight the potential of utilizing metal wastes for efficient carbon sequestration through mineral carbonation, contributing to sustainability and waste management efforts.