Removal and Recycling of Antimony in a Gold Concentrate

In this article, antimony was removed from the gold concentratebythe alkali leaching method, and then the recovery of antimony solution was also studied. The test used NaOH-Na₂S process to remove in gold concentrate, which achieved the purpose of reducing antimony in the gold concentrate, and determined the best process parameters for the antimony removal.The addition amount of Na₂S is more than 1.8 times the theoretical amount, the temperature is 80 ℃, the NaOH concentration is 16 g/L, the liquid to solid ratio is 5∶1, the time is 60 min, and the removal rate can reach more than 98% at the optimal process conditions. Antimony can be recovered by neutralizing precipitation method, oxygen method can also be used from the antimony solution to obtain qualified antimony salt products, and the antimony content can reach more than 49%.