Process of treating end-of-life cathode ray tubes for lead and soluble silicates recovery

摘要

There is described a process of recycling screen glass resulting from the disposal of cathode tube televisions, with quantitative recovery of lead in the form of sulphide and of silicates of cations other than lead, and subsequently recycling all the materials so recovered. The process comprises an alkaline leaching or etching step with a strong alkaline solution (NaOH or KOH) followed by lead precipitation in the form of lead sulphide.