It influences the process index that acidic copper-containing ore pulp sediments slow and solid and liquid are difficult to separate during the copper recovery process from gold concentrate roasting residue by acid leaching in a smelter,the small-scale experimental research is carried out by adding flocculants to accelerate ore pulp sedimentation,and the process optimization as well as practice is conducted.The results showed that with the optimal conditions that ore pulp concentration is 30 %,ore pulp temperature 60 ℃,and 6 million molecular weight cationic polyacrylamide flocculant dosage 20 g/t,the sedimentation velocity can be up to 3.3 mm/min,indicating good sedimentation effect.After the process optimization,the sedimentation velocity of ore pulp is evidently faster,cationic copper mass and yield are evidently increased.The mass reaches the requirement of No.1 standard copper and the yield is improved by about 10 %.