ABSTRACT
The changes of raw material’s characteristic and challenges of processing copper ores containing high concentration of arsenic and antimony was considered. The analysis of the main methods shows that alkaline sulphide leaching is the most effective way to process off-grade copper concentrates. Leaching of concentrates’ samples containing approximately 1,36% As and 19.2% Cu was studied in alkaline sulphide solutions containing sodium hydroxide and sodium sulphide
Experiments were carried out with the assistance of the laboratory base of St. Petersburg mining university’s Common Use Centre. Experimental results of concerning the selective removal of arsenic are presented here.
