Investigation and evaluation for flow and purification effect of heavy metal-containing materials in zinc smelting processes are important and can provide important basic data for controlling heavy metals in the metallurgical off-gas. Heavy metals involved in the materials of zinc ore smelting and metallurgical off-gas were analyzed by XRF

ICP-OES

ICP-MS and double light display mercury analyzer. The results show that after zinc fine ore roasting

58% Pb and 75% Cd enter into solid materials of zine calcine and dust

52% As and about 100% Hg flow into metallurgical off-gas. After acid washing and electrostatic demisting

the removal of Pb

Hg

Cd and As are 78.6%

35%

90.9% and 83.2% respectively. After deep removal of mercury by Boliden-Norzink technology

the Hg removal is 90.1%. Based on the characteristics mentioned above for heavy metals flow and purification effect

it should be considered that dust removal process must be enhanced to remove effectively Pb and Cd in the metallurgical off-gas

and technology improvement is needed to meet emission standard although the Boliden-Norzink technology has good removal efficiency for mercury.