Enhancing Pb Removal and Synthesizing Glass–Ceramics from Waste CRTs Funnel Glass by Red Mud

Abstract

In this paper, a novel and effective process for removing lead and synthesizing glass–ceramics from the hazardous waste CRTs funnel glass and red mud was developed. Glass–ceramics was produced through an appropriate sintering treatment of the residual glass after lead from funnel glass was removed. Vacuum smelting results showed that the addition of red mud had contributed to enhance Pb removal from funnel glass as compared to the same process without red mud. When the red mud mass was added 60 wt%, more than 99.93% of Pb was successfully removed and the Pb content was reduced to 0.0093 wt%. Metallic lead with 99% purity was recycled. The sintering process showed that the CaO–Al2O3–SiO2 type glass–ceramics were synthesized with different microstructure crystallinity and morphology. Overall, the results demonstrated that red mud can not only enhance PbO removal from waste CRT funnel glass, but also fabricate glass–ceramics combining residual glass. Route of removing Pb and synthesizing glass–ceramics from waste CRTs funnel glass by red mud.