基于硫酸调浆的铜铅锌多金属矿浮选分离工艺研究  

Flotation Separation of Cu-Pb-Zn Polymetallic Ore Based on Sulfuric Acid as Regulator

作　　者：陈章鸿 刘四清[1] 陈思雨 郎剑涛 Chen Zhanghong;Liu Siqing;Chen Siyu;Lang Jiantao(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming,Yunnan,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《矿产综合利用》2022年第2期79-85,共7页Multipurpose Utilization of Mineral Resources

摘　　要：老挝某铜铅锌多金属矿主要有用元素为铜、铅、锌及伴生元素银。针对矿石中有用元素共生关系密切和嵌布粒度细的特点,在探索实验的基础上开展了铜、铅、锌依次优先浮选的条件实验及流程结构优化实验。通过硫酸调浆,在弱酸性介质中实施快速优先浮铜、选铜中矿返回选铅的新工艺,在原矿含Cu2.07%、Pb 5.76%、Zn2.95%、Ag 443 g/t的情况下,闭路实验获得铜精矿含Cu 20.18%、Pb 10.32%、Zn 1.52%,Cu回收率达到82.40%,且伴生银在铜精矿中含量高达2738 g/t,回收率为52.00%;铅精矿含Pb 45.35%、Cu2.43%、Zn 3.34%,Pb回收率达到71.54%;锌精矿含Zn 42.21%、Cu 0.07%、Pb 2.55%,Zn回收率达到70.15%。成功地实现了铜、铅、锌的高效分选及伴生银的综合回收,为该资源开发利用提供了技术参考。The main valuable elements of a Cu-Pb-Zn polymetallic ore in Laos are Cu,Pb,Zn and associated Ag.Aiming at the characteristics of the close association and fine dissemination of the valuable minerals,on the basis of exploratory experiments,the condition tests of preferential flotation of copper,lead and zinc successively and the structural optimization tests of the circuit were carried out.Through H_(2)SO_(4) used as regulator to create a weak acidic medium in the slurry,and the new process of flash copper flotation and its middlings return to Pb flotation circuit was carried out.When the feed assays 2.07%Cu,5.76%Pb,2.95%Zn and 443 g/t of Ag,results in closed-circuit test show that the copper concentrate contains 20.18%Cu,10.32%Pb and 1.52%Zn,at Cu recovery of 82.40%,and silver in the concentrate is as high as 2738 g/t at Ag recovery of 52%;lead concentrate assays 45.35%Pb,2.43%Cu and 3.34%Zn at Pb recovery of 71.54%;zinc concentrate contains 42.21%Zn,0.07%Cu and 2.55%Pb at Zn recovery of 70.15%.The efficient separation of Cu,Pb and Zn minerals and the recovery of associated silver have been successfully realized,which provides a technical reference for the development and utilization of this resource.

关 键 词：铜铅锌多金属矿 酸性介质 组合抑制剂 优先浮选 

分 类 号：TD952[矿业工程—选矿]