Abstract Chalcopyrite (CuFeS 2 ) is the most refractory copper mineral when treated in conventional sulfate media leaching systems. This first study to examine use of a dimethyl sulfoxide (CH 3 SOCH , DMSO) solution containing chloride (CuCl for chalcopyrite. Leaching experiments concentrate composed mainly chalcopyrite were conducted at ambient pressure 313–413 K. The fractions Cu, Fe, S, Au, ...

When the pressure leaching process of chalcopyrite is operated in low and medium temperature range 90℃~150℃, sulfur component converted to elemental sulfur, which suppresses copper. In present study, copper rate was improved by adding chloride ions surfactants during medium-temperature at 150℃. Using autoclave equipped with a 2L reactor made titanium, leach tests were conducted for 180 min usin...

Magnesium oxide suitable for the use in basic refractories was prepared from dolomite (CaMg(CO3)2) by hydrochloric acid leaching, precipitation with CO2 and thermal hydrolysis. Leaching of the dolomite ore in aqueous hydrochloric acid solution was investigated with respect to the effects of time on dissolution of the dolomite sample. The dependence of the observed dissolution rate on pH was est...