Influence of excess sulfide ions on the malachite-bubble interaction in the presence of thiol-collector

摘要: Abstract In this study, the effects of type (ammonium sulfide (NH4)2S and sodium (Na2S)) amount (8 × 10−5 mol/L 2 × 10−3 mol/L) sulfidizing reagents used in malachite flotation with xanthate as a collector on recovery were investigated well-controlled Hallimond tube. The results showed that average was similar regardless agent; however, significant difference observed when agents varied. Specifically, had higher sulfidized at low concentration than high concentration. This result not explained by either differences extent sulfidization or electrostatic interaction between malachite, which supported XPS XRD analyses, adsorption tests agents, zeta potential measurements. Notably, without excess ions exhibited significantly greater agent. These well from potentiometric titration tests, onto surface ions. Therefore, excessive use confirmed to inhibit surface, consequently, decrease malachite.