福建某难选硫化铅锌矿石选矿试验

福建某铅锌矿属于难分离硫化铅锌矿，矿物种类繁多，嵌布关系复杂，共生关系密切。为高效开发利用该矿石资源，采用优先浮选工艺进行了选矿试验。结果表明，在磨矿细度为-0.074 mm占70%的情况下，采用1粗2扫3精选铅，1粗1扫3精选锌，中矿顺序返回闭路流程处理该矿石，最终可取得铅品位为41.46%、含锌4.19%、铅回收率为81.76%的铅精矿，和锌品位为48.26%、含铅0.83%、锌回收率为84.88%的锌精矿。试验确定的优先浮选工艺是该矿石的高效开发利用工艺。

Beneficiation Experiment on a Refractory Lead-zinc Sulfide Ore from Fujian

A lead-zinc ore in Fujian belongs to a refractory lead-zinc sulfide ore with characteristics of complex mineral composition，complex dissemination and close associations with each other.In order to high efficiently exploit and utilize the resources，experimental study on the ore was made by adopting the preferential flotation process.Results showed that under the grinding fineness of 70％ -0.074 mm，lead concentrate with Pb grade of 41.46% and recovery of 81.76%，and zinc concentrate with Zn grade of 48.26% and recovery of 84.88% were obtained respectively by the process of lead concentration with one roughing-three cleaning-two scavenging，zinc concentration with one roughing-three cleaning-one scavenging，and middlings back to the flow-sheet in turn.The selective flotation process is a highly efficient method for exploiting the ore.