Patent ID: 6030433
Filing Date: 2000-02-29
Classification: C01B,C01G,C22B,Y02P,Y10S

Abstract:
Method for extracting metals from metal-containing materials, which consists essentially of:reacting the metal-containing materials at a temperature ranging between 700 and 1100.degree. C. with a gas composition comprising at least 25-45% by volume of water vapor, 0-12% by volume of carbon dioxide, and 2-20% by volume of hydrogen chloride; said metal-containing materials containing:at least one metal selected from the group consisting of Zn, Cd, Pb, Hg, Cu, Sn (as Sn(0) and Sn(II)), As, Sb, Au, Ag and Bi, andat least one other metal selected from the group consisting of Fe, Cr, Mn, Ni, Mg, Ca, Al, Si, Ti, Co and Zr; andextracting said at least one metal in the form of a volatile metal chloride.