Influence of roasting temperature on reactions between ferruginous blende and copper(II) oxide

Thermal treatment in an oxidizing atmosphere of a mixture of raw blende (ZnS) and Copper(II) oxide enhanced the formation of a mixed ferrite phase at temperature about 600 degree C. The composition established at 900 degree C was approximately (0. 8 ZnO multiplied by (times) 0. 2 CuO)Fe//2O//3. For the mixture ZnS-CuO, with 5 to 15% CuO by weight, less than 15% copper was involved in the formation of the spinel phase. The increasing copper content in the mixture, roasted above 1000 degree C, favored solubilization of iron, even in a weakly acid medium.SCOPUS: ar.jFLWNA