Mössbauer spectroscopy study on the oxidation of sulfide zinc concentrate rich in marmatite

The process of oxidation of sulfide zinc concentrate containing larger quantities of iron (in the form of pyrite and marmatite) is studied through thermal treatment in a stationary layer and air atmosphere. The following methods of study are used: Mössbauer spectroscopy, X-ray diffraction analysis, DTA and TG, chemical analysis, etc. Mössbauer spectroscopy was used to keep track of the presence and changes in the content of the following phases: FeS2, mZnS·nFeS, CuFeS2, FeSO4, Fe2O3 and ZnFe2O4 in the initial concentrate and in the products of its oxidation at different temperatures. Conclusions are made about the influence of roasting temperature on the content of the different iron-containing phases in the oxidation products.