Study On Theory And Process Of Sulphidizing-amination Flotation Of Smithsonite

Sulphidizing-amination flotation has been one of the most important process for zinc oxide minerals flotation. In this paper, single mineral flotation was carried out to investigate the effect of collector, regulator of sodium carbonate, activator of sodium sulfide, depressor of sodium hexametaphosphate and sodium silicate on the flotation of zinc oxide minerals. Zeta potential test, infrared spectroscopy test and solution chemistry analysis were used to determine the reaction mechanism between reagents and smithsonite surface, which might provide some references for the sulphidizing-amination flotation of zinc oxide minerals.The main results were as follows:1. When using amine salt as a collector, sodium sulfide could activate the flotation of smithsonite, and can significantly reduce the amount of amine collector, and the optimum action time was3min. Quartz could be difficult to float when using GE-609as collector in the presence of1000mg/L sodium sulfide. Smithsonite and calcite could be separated when using GE-609as collector in the presence of sodium hexametaphosphate or sodium silicate.2. After interaction with sodium sulfide, the amorphous zinc sulfide is generated on the surface of smithsonite. The results of infrared spectroscopy test showed that GE-609mainly adsorb on the smithsonite surface through chemical reaction.3. The flowsheet of sulphidizing-amination flotation was carried out to separate zinc oxide minerals using sodium carbonate as regulator, sodium hexametaphosphate and sodium silicate as depressor, sodium sulphide as activator, GE-609as collector, respectively. Zinc concentrate with grade of23.71%, recovery rate of71.32%was obtained.