云南某铅锌矿伴生银的综合回收研究  

Comprehensive recovery of associated silver from a lead-zinc ore in Yunnan province

作　　者：王春光 

机构地区：[1]澜沧铅矿有限公司,云南普洱665600

出　　处：《中国矿业》2017年第4期131-134,145,共5页China Mining Magazine

摘　　要：云南澜沧某铅锌多金属硫化矿矿石嵌布粒度细、共生关系复杂,为了解决铅锌精矿互含、铅精矿中伴生银回收率较低的问题,本文采用了自主研发的铅捕收剂WX-1,对铅浮选有较好选择性。采用优先浮铅的工艺流程,在磨矿细度为-0.074mm占75%的条件下,铅浮选的粗选段采用石灰抑制含铁矿物,采用ZnSO_4+Na_2CO_3+Na_2SO_3作为锌抑制剂组合使用,采用WX-1与乙硫氮作为铅的捕收剂组合使用;在锌浮选的粗选段采用硫酸铜作为选铅尾矿中锌的活化剂,丁基黄药作为锌捕收剂。最终经过闭路流程,得到铅品位为54.89%、铅回收率为90.38%,含银品位为2 498.53g/t、银回收率为84%的铅精矿和锌品位为40.46%、锌回收率为80.98%的锌精矿,实现了铅、锌的有效分离,并提高了伴生银的回收率。A serious of tests of flotation was made based on the characteristics of a certain lead-zinc ore in Langcang,Yunnan province.the valuable elements were lead、zinc and silver,and lead sulfide was used as carrier minerals for recovering silver.A reasonable process and regime of agent was determined：in the condition of the grinding fineness was 75% under 0.074 mm,it was used calcium to form high alkaline as a depressant of pyrite,the combined reagent of ZnSO4＋Na2CO3＋Na2SO3 was used to be a depressant of zinc,with the dosage is of（1000＋1000＋500）g/t;a new collector contains diethyldithiocarbamate and a self-developed chemical called WX-1was used to collect lead and silver with the dosage is of（50＋60）g/t,which can improve the recovery of silver and perfect the difficulty separation of lead and zinc concentration;Copper sulfade was used to active the zinc in the tailing after lead flotation with the dosage is of 800g/t;butyl xanthate was used to be collector with the dosage is of 100g/t.Throughing the closed-circuit test of preferential lead flotation,it was gained the lead concentrate contain 54.89% lead and 2 498.53g/t,with lead recovery of 90.38% and silver recovery of 84%,zinc concentrate contain 40.46% zinc,with the zinc recovery of 80.98%.Thus effective recovering of lead,zinc and silver can be achieved.

关 键 词：铅锌矿 新型捕收剂 优先浮选 

分 类 号：TD923[矿业工程—选矿]