Abstract:The strontium carbonate (SrCO3) is one of the key additives for keeping the stable electrodeposition of metal zinc. Herein, reclamation of Sr from the anode slime and returning it to zinc electrolyte was realized by HCl leaching firstly, followed by Na2CO3-induced precipitation of SrCO3 from the leaching solution. The optimization of reaction temperature, reaction time, liquid-solid ratio and the amount of sodium carbonate were investigated. When the leaching temperature is 65 ℃, leaching time is three hours, ratio of liquid to solid is 30 mL/g, and the amount of sodium carbonate is 1.5 times the molar amount of strontium sulfate, the recovery of strontium in anode slime is 37.6%, and the obtained strontium carbonate product contains strontium 42.9% (equivalent to 71.5% SrCO3). The main metallic impurities are zinc and manganese, which will not induce deterioration for zinc electrodeposition because both Zn2+ and Mn2+ are the main ions of zinc electrolyte. Therefore, the obtained SrCO3 can be recycled into the electrolyte as additive for zinc electrodeposition. The research results are expected to provide reference for the recovery and utilization of strontium resources in anode slime of zinc smelting.