Method for improving indium leaching rate of low-iron zinc oxide smoke dust

The invention discloses a method for improving the indium leaching rate of low-iron zinc oxide smoke dust. According to the method, during two-stage leaching of zinc oxide smoke dust, sulfur tailings produced after sulfur flotation of zinc oxygen pressure leaching residues are added are used for supplementing iron ions for a system. The sulfur tailings are supplemented, leaching of indium in the indium-containing materials is promoted through leaching of iron in the sulfur tailings, and therefore the purposes of improving the indium leaching rate and reducing the indium content of tailings are achieved. 本发明公开了一种提高低铁氧化锌烟尘铟浸出率的方法。该方法在氧化锌烟尘二段浸出时加入锌氧压浸出渣经硫浮选后产出的硫尾矿为体系补充铁离子。通过补充硫尾矿，利用硫尾矿中铁的浸出促进含铟物料中铟的浸出，从而达到提高铟浸出率、降低尾渣含铟的目的。