METHOD FOR RECOVERING IN FROM PB-IN-AG ALLOY

摘要

PURPOSE:To efficiently recover In by a relatively simple method from In-contg. raw materials having a low In grade like Pb-In-Ag alloy scrap. CONSTITUTION:The dross formed by bringing the alloy contg. 5 to 30wt.% In, 1 to 5wt.% Ag and consisting of the balance substantially Pb and a compsn. contg. >=15wt.% In and consisting of the balance substantially Pb and NH4Cl into contact with each other in such a manner that the weight ratio of the In in the alloy and the compsn. attains 10:1 to 4 is separated from the metal- components and is thickened, by which the In is recovered.