EXPERIMENTS ON REMOVAL OF ZINC FROM EAF DUST USING FERROUS CHLORIDE

摘要

The chloridizing method using ferrous chloride was employed in this research to thermally treat the EAF dust, some results are as follows: Ferrous chloride can be used to volatilize Zn, Pb, Cd and Cu from EAF dust, the highest recoveries of Zn and Pb reached to 97.50% and 99.47%, respectively. Among the reaction parameters, temperature takes a dominant role in the chloridizing process. Below 1000℃, the increasing of temperature could improve the removal of Zn and Pb from EAF dust. As temperature exceeded 1000℃. there was no obvious increase in the recovery of the desired elements. The best temperature to treat this CDN EAF dust was about 1000℃. The amount of FeCl_2 used has been found some influence on the removal process in this study. For recovery of Zn greater than 95%. more than 55% of FeCl_2 is indicated.