The process of cobalt removal from zinc sulphate solution using rude antimony trioxide as an additive was investigated. The rude antimony trioxide was produced in treatment of copper and lead anode mud and its main components are antimony trioxide, antimony arsenate and lead antimonate. Using the rude antimony trioxide as the additive of cobalt removal can not only decrease operation cost of purification but also find out a new way for utilization of the rude antimony trioxide. The effects of temperature, dosage of zinc dust, the rude antimony trioxide, copper ion and solution pH on removal of cobalt were studied. And experimental data using the rude Sb 2O 3 as additive were compared with those using Sb 2O 3. The results indicate that using rude Sb 2O 3 as additive, cobalt concentration in solution could be decreased from 24 mg/L to below 1 mg/L under about the same conditions as using Sb 2O 3. The process of cobalt removal from zinc sulphate solution using rude antimony trioxide was an additive was investigated. The rude antimony trioxide was produced in treatment of copper and lead anode mud and its main components are antimony trioxide, antimony arsenate and lead antimonate. Using the rude antimony trioxide as the additive of cobalt removal can not only decrease operation cost of purification but also find out new way for utilization of the rude antimony trioxide. The effects of temperature, dosage of zinc dust, the rude antimony trioxide, copper ion and solution pH on removal of cobalt were studied. And experimental data using the rude Sb 2O 3 as additive were compared with those using Sb 2O 3. The results indicate that using rude Sb 2 O 3 as additive, cobalt concentration in solution could be decreased from 24 mg / L to below 1 mg / L under about the same conditions as using Sb 2O 3.