某银精矿氰化尾渣中铅和锌的浮选回收试验

Study on Flotation Experiment of Lead and Zinc from Cyanide Gangue Residues in a Silver Concentrate

某浮选银精矿经常温常压碱式氧化预处理—氰化浸出金、银后的氰化尾渣中,含有铅、锌、金、银等有价元素,金属矿物主要为黄铁矿、方铅矿、闪锌矿和毒砂,并含有少量含银矿物。该尾渣粒度很细,含泥量大,铅、锌矿物被氧化,使铅、锌的选别回收受到影响。对该尾渣进行铅、锌的浮选试验,结果表明,铅矿物不能得到有效富集而形成铅精矿,但可以获得锌品位为55.62%,锌回收率为66.15%的合格锌精矿,锌精矿中金、银品位为66.94 g/t和538.9 g/t,金、银回收率为47.96%和25.67%。

There are some valuable minerals as lead, zinc, gold and silver in a cyanide gangue residue, where silver concentrate is pre-treated from leaching-cyanide gold and silver being intensified as alkaline at normal temperature and pressure. The main metallic minerals are pyrite, galena, sphalerite and arsenic pyrite, and there is a little silver mineral. The size of gangue residue is very fine, and there is lot of mud in gangue residue, lead and zinc mineral is oxidated very much, and recovering of aim mineral is effected. The lead is not enriched by flotation, and the index of grade of zinc concentrate being 55.62% ,recovery of zinc being 66.15% ,grade of gold and silver being 66.94 g/t and 538.9 g/t,recovery of gold and silver being 47.96% and 25.67% in zinc concentrate.