Patent ID: 6258018
Filing Date: 2001-07-10
Classification: A62D,B09B,B09C,C02F,C04B,E02D,G21F,Y02W

Abstract:
A method of treating metal-bearing material to stabilize leachable metal contained therein, said method comprising the steps of:contacting a metal-bearing material with a suspension comprising a first component and a second component to form a mixture, wherein said metal-bearing material contains at least one leachable metal selected from the group consisting of lead, aluminum, arsenic (III), barium, bismuth, cadmium, chromium (III), copper, iron, nickel, selenium, silver and zinc, wherein said first component supplies at least one member from the group consisting of sulphates, chlorides, fluorides, magnesium, halides, halites and silicates, and wherein said second component supplies at least one phosphate anion; andcuring said mixture for a period of time to form a cured material;wherein the leachable metal level in said cured material is below 5.0 mg/l.