摘要
针对国外某氧化铅锌矿开展了选冶联合工艺研究,采用硫化焙烧-浮选工艺回收铅、锌。工艺矿物学研究表明,矿样中的锌主要以硫化锌和碳酸锌两种形式存在,铅主要以硫化铅和铅铁矾形式产出。闪锌矿和菱锌矿属于微细粒和细粒嵌布的范畴。硫化剂、焙烧时间和焙烧助剂是影响硫化焙烧效果的主要因素,而焙烧温度、物料粒度的影响不显著。矿石中含有黄铁矿,因此硫化焙烧不需另外添加硫化剂。采用硫化焙烧-混合浮选工艺,在焙砂磨矿粒度-0.038 mm粒级占92.56%条件下,经一次粗选、三次扫选、十次精选闭路流程选别(中矿顺序返回),可获得产率22.96%、含Pb 9.87%、含Zn 38.92%、Pb+Zn品位为48.79%的混合铅锌精矿,Pb、Zn回收率分别为75.79%和79.78%。
A combined beneficiation and metallurgical technology has been adopted in the research on some lead-zinc oxide ore abroad, in which lead and zinc were recovered with a process of sulfidation roasting-flotation. The process mineralogical study indicates that, the dominant zinc in the ore samples exists in the form of zinc sulfide and zinc carbonate, while the predominant lead-beating minerals are lead sulfide and plumbojarosite. Besides, both sphalerite and bonamite are fine-grained and fine disseminated. Sulfurizing reagent, roasting time and roasting activator are principal factors influencing sulfidation roasting effect, while roasting temperature and feed size bring little impact on roasting. Due to the containment of pyrite in the ore, no sulfurizing reagent is needed for sulfidation roasting. The process flowsheet of sulfidation roasting followed by bulk flotation was adopted in the test, With a grinding fineness of -0.038 mm 92.56%, the calcine was subjected to a closed-circuit process consisting of one roughing, three stages of scavenging, ten stages of cleaning（with middlings back to the circuit in sequence）, producing a lead-zinc bulk concentrate with 22.96% yield, containing 9.87%Pb and 38.92%Zn, assaying 48.79%Pb＋Zn, with a Pb recovery of 75.79% and Zn recovery of 79.78%.
出处
《矿冶工程》
CAS
CSCD
北大核心
2013年第5期106-110,共5页
Mining and Metallurgical Engineering
关键词
氧化铅锌矿
硫化焙烧
混合浮选
lead-zinc oxide ore
sulfidation roasting
bulk flotation
