广东大尖山某铅锌多金属矿石选矿试验

广东大尖山某铅锌多金属矿石铅品位为2.10%、锌品位为3.805%、银含量为35.85 g/t。矿石铅、锌均主要是以硫化矿的形式存在，硫化铅和硫化锌分别占总铅和总锌的95.71%和95.84%。为给该矿石开发利用提供依据，进行了选矿工艺试验。结果表明：矿石磨细至-74 μm占80%，以CaO为矿浆pH调整剂、硫酸锌为抑制剂、丁胺黑药+丁黄药为捕收剂，经1粗3精4扫铅浮选，铅浮选尾矿以CaO为矿浆pH调整剂、CuSO₄为活化剂、丁黄药为捕收剂，经1粗3精4扫锌浮选，获得了铅精矿铅品位60.29%、铅回收率92.02%、含银826.13 g/t、银回收率72.75%、含锌3.64%，锌精矿锌品位48.32%、锌回收率92.30%、含铅0.95%的指标。

Separation Experiment on a Lead-Zinc Polymetallic Ore in Dajianshan of Guangdong

There is 2.10% Pb，3.805% Zn，and 35.85 g/t Ag in a lead-zinc polymetallic ore in Dajianshan of Guangdong.Lead and zinc mainly exists in form of sulfide minerals，lead sulfide and zinc sulfide accounts for 95.71% and 95.84% of total lead and total zinc，respectively.To provide technique basis for development and utilization of the ore，beneficiation experiment was conducted.Results indicated that，at grinding fineness of 80% passing 74 μm，using CaO as pulp pH regulator，zinc sulfide as depressor，ammonium dibutyl dithiophosphate + butyl xanthate as collector，via two roughing three cleaning four scavenging flotation，tailings of lead flotation using CaO as pulp pH regulator，CuSO₄ as activator，butyl xanthate as collector，via one roughing three cleaning four scavenging flotation，lead concentrate with 60.29% Pb，recovery of 92.02%，826.13 g/t silver，recovery of 72.75%，3.64% Zn，Zinc concentrate with 48.32% Zn，recovery of 92.30%，and 0.95% Pb was obtained.