Chalcopyrite Leaching with Hydrogen Peroxide in Formic Acid Medium

The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution

“…To achieve high leaching efficiency for copper, a solid/liquid ratio of 1:100 was selected as the most suitable ratio, and changes to other test conditions maintained the solid/liquid ratio at 1:100. Arslanoglu and Yaras [34] found that copper extraction increased from 7.83 to 62.37% as the liquid/solid ratio increased from 2 to 100, respectively. Generally, the liquid/solid ratio is high in most studies with hydrogen peroxide to eluci- The results shown in Figure 4 indicate that the greatest degree of copper extraction was achieved in the most dilute suspension (S/L = 1:100), which corresponds to a concentrate mass of 2 g. Increasing the solid phase content in the solution (S/L ratio from 1:50 to 1:10) led to a decrease in the copper extraction values.…”

“…To achieve high leaching efficiency for copper, a solid/liquid ratio of 1:100 was selected as the most suitable ratio, and changes to other test conditions maintained the solid/liquid ratio at 1:100. Arslanoglu and Yaras [34] found that copper extraction increased from 7.83 to 62.37% as the liquid/solid ratio increased from 2 to 100, respectively. Generally, the liquid/solid ratio is high in most studies with hydrogen peroxide to elucidate the kinetics of the leaching process [24,31].…”

“…Arslanoglu and Yaras [34] found that the highest leaching yields of copper and iron during chalcopyrite leaching with hydrogen peroxide in formic acid occurred at 500 min −1 as a result of better contact between the chalcopyrite particles and the leach solution at higher stirring speeds. Hu et al [35] carried out leaching tests on chalcopyrite in a 10% (v/v) [HMIm]HSO 4 aqueous solution at 40 • C with 20% H 2 O 2 and revealed that the chalcopyrite dissolution rates were not significantly changed when the stirring speed was greater than 200 min −1 .…”