Abstract: Recovery of antimony and copper by oxidation acid solution-tartaric acid complexation leaching methods from tailings of lead slag coal-based direct reduction was conducted.The results showed that:①leaching rate of antimony and copper were only 64.37% and 85.41% respectively under the optimal conditions of sulfuric acid 169.5 g/L，hydrogen peroxide 12.50 mg/L，liquid to solid ratio 6∶1 at 90 ℃ oxidized reaction 60 min.② Hydrolysis of Sb3+ and Cu2+ ion can be inhibited by complexation reaction using tartaric acid.Leaching rate of antimony and copper were 78.79%，90.72% respectively with tartaric acid of 25 g/L for reaction 10 min.The leaching rates were increased by 14.42 and 5.31 percentage points compared with without tartaric acid adding.③The stability of Sb3+，Cu2+ ion and the leaching rate of antimony and copper were also affected by filtrate pH.The leaching rate of antimony and copper increased from 78.79%，90.72% to 86.07%，91.58% respectively when filtrate pH decreased from 7.0 to 1.5.Therefore，the leaching rate of antimony and copper were improved by tartaric acid adding in oxidizing acid leaching process as the complexing agent or controlling filtrate pH to inhibithydrolysis of Cu2+ and Sb3+ ions.

Key words: Oxidizing acid leaching, Tartaric acidcomplexing, Raw material, Antimony, Copper