LAUSR

ABSTRACT It is known that the treatments of chlorine-containing wastes, such as municipal solid waste incineration fly ash are particularly challenging. One method for treating chloride is to entrap it in glass by melting. It has been demonstrated that CaCl2 can be retained in CAS system glass-ceramics. However, as the main chloride, NaCl exhibits a low boiling point and a high vapour pressure. The fixation of NaCl and its effect on glass-ceramics remain unclear. In this study, 2.17% Cl− was incorporated into the base glass by limiting NaCl volatilisation during melting. Glass-ceramics were successfully prepared using the Cl-containing glass powder as the raw material by sintering and the chloride was evenly distributed between the glass phase and crystalline phase. The primary crystal phases observed were wollastonite and anorthite. Furthermore, when the sample was sintered at 825 °C for 4 hours, it exhibited a bending strength of 155 MPa and a hardness of 6.29 GPa. This method can effectively address the resourceful treatment of chlorine-containing wastes.