Patent ID: 6139485
Filing Date: 2000-10-31
Classification: A62D,B09B,B09C,C02F,C04B,G21F,Y02W

Abstract:
A method of treating lead-bearing material to stabilize leachable lead contained therein, said method comprising the steps of:mixing a lead-bearing material containing leachable lead with a treatment additive comprising a first component and a second component to form a mixture, wherein said first component supplies at least one member from the group consisting of sulphates, chlorides, fluorides, halites, halides, and silicates, and wherein said second component supplies at least one phosphate anion in solution form; andcuring said mixture for a period of time to form a cured material;wherein said lead-bearing material so treated is substantially solid in form at the end of curing, and the leachable lead level in said cured material is below 5.0 mg/l.