Abstract: 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.

Key words: zinc metallurgical off-gas, heavy metals, material flow, pollution control

摘要： 锌矿焙烧和烟气净化中重金属的物质流向及治理的研究和评价，是冶炼烟气重金属污染控制的重要基础数据和依据。通过XRF、ICP-OES、ICP-MS、双光数显测汞仪检测分析锌矿焙烧物料及烟气中的重金属含量。结果表明锌精矿焙烧后，58%以上的Pb、75%以上的Cd随焙砂、收尘进入固态物中，52%以上的As、100%的Hg进入烟气。烟气经过酸洗和电除雾后，Pb、Hg、Cd、As的去除率分别为78.6%、35%、90.9%和83.2%，波立登除汞塔深度脱Hg后，Hg的去除率达到90.1%。根据重金属的物质流向和净化效果特征得出，对于冶炼烟气中Pb、Cd等重金属的去除需要加强除尘，波立登脱汞技术对Hg的去除效率高，但要达标排放还需要技术改进。

关键词: 锌冶炼, 重金属, 物质流, 污染控制