Trading with Al, Zn, Pb, Sn, Cu and Ni…. Ag, Au, Pt, Pd, Rh, Bi, Co, Sb, Mo, In, Se, Te, Ge, Ga, V, Ta, Nb, Re, As, Hg, Ti, FeTi, FeW, Vn, Cr, Sb, Mo, Ho, Gd and others. … Physical forms : metals, sludges, flue dust, powders, drosses, slags, mattes, spent catalysts, concentrates, skimmings, filter