Blown zinc powder, electric furnace zinc powder, zinc alloy powder and distilled zinc powder were respectively taken in the test of cobalt removal by arsenic trioxide purification process to investigate influences of several factors on cobalt removal effect, including an adding amount of zinc powder, temperature and time of reaction, a mole ratio of copper to cobalt and a mole ratio of antimony to cobalt. Results show that when copper sulfate is added with copper and cobalt in a mole ratio of 5.0, potassium antimony tartrate is added with antimony and cobalt in a mole ratio of 0.5, a reaction at 90 ℃ for 90 min, with rotation speed of 300 r/min and addition of zinc powder at an amount of 2 g/L, the cobalt removal rates by using 4 different kinds of zinc powder are 95.73%, 96.15%, 95.94% and 94.87%, respectively, indicating the cobalt removal effect of different powder in the following descending order: electric furnace zinc powder > zinc alloy powder > blown zinc powder > distilled zinc powder.

arsenic trioxide purification process  /  cobalt removal  /  zinc powder  /  zinc smelting