Oxidation of Lead Blast Furnace Matte.
U S Pat 3 615 190 1971 Oct; :
A process is described for oxidizing lead blast furnace matte which consists of treating the matte with o2 in an acidic aqueous solution having a ph not higher than 1.5 and a temperature no higher than 50 deg. C. Metal sulfides are oxidized in the matte to sulfates which can then be separated by conventional leaching methods. The pb blast furnace matte used contains pb 10-20, cu 1-2, and fe 20-40, all of which are in the form of sulfides. The matte is ground to a particle size of -200 mesh prior to reacting with mineral acid. Cu and fe also are recovered.
U.S. Pat. 3,615,190; Oct. 26, 1971; Chem. Abstr. 76:27,319S