Abstract: In order to improve the utilization rate of mineral resources，realize the efficient recovery of antimony，and reduce the adverse effect of antimony on the subsequent roasting cyanide gold extraction pro⁃ cess，a small-scale experimental study on the alkaline leaching antimony process was carried out for the an⁃ timony-bearing gold concentrate obtained by the flotation process of a gold concentrator. Based on the test results，the process parameters of the downstream smelting enterprises were optimized and adjusted. The production practice shows that using sodium sulfide and sodium hydroxide as leaching agents，under the conditions of slurry concentration 40%，sodium sulfide excess coefficient 1.2，sodium hydroxide concentra⁃ tion 40 g/L and leaching temperature (51±1) ℃ for 45 min，the antimony leaching rate is more than 97%. Compared with the process before optimization and adjustment，the antimony leaching rate is increased by more than 2 percentage points，and the gold recovery rate of the subsequent roasting cyanidation gold extrac⁃ tion process is increased by more than 0.5 percentage points，which realizes the improvement of quality and efficiency，and the economic benefit is remarkable.

Key words: antimony-bearing gold concentrate, alkaline leaching of antimony, experimental study, in? dustrial application