摘要
甘肃某铅锌矿石中铅、锌、银、碳含量分别为0.90%、3.14%、25.63 g/t、6.30%,属于高碳铅锌矿石,矿石中的主要金属矿物为方铅矿、闪锌矿和黄铁矿,脉石矿物主要是石英,主要含碳矿物为方解石。方铅矿主要呈他形粒状不等粒嵌布,部分粒度细小者星散分布在矿石中,粒度粗大者多与闪锌矿、含银矿物紧密共生;闪锌矿主要呈他形粒状,基本不含银,少量以细粒星散状分布在矿石中,大部分粒度较粗,以团脉状、条带状、细脉状集合体形式存在。含碳矿物的存在会造成铅锌浮选分离困难,为解决该铅锌矿石的浮选分离问题,对此进行了选矿试验。结果表明,矿石在磨矿细度为-0.074 mm占65%的情况下,采用1粗2扫3精的低碱度工艺流程优先选铅、1粗2扫2精工艺流程选锌,可获得铅品位为51.45%、铅回收率为85.26%、含银1 098.00 g/t、银回收率为64.17%、含锌4.89%的铅精矿,以及锌品位为53.38%、锌回收率为91.14%、含银84.87 g/t、银回收率为17.73%的锌精矿。
Lead,zinc,silver and carbon contents in a lead-zinc ore of Gansu are 0.90%,3.14%,25.63g/t and 6.30%, respectively.The ore belongs to high carbon lead-zinc ore,the main metal minerals in the ore are galena,sphalerite and py- rite,gangue minerals are mainly quartz,and the main carbon-bearing minerals are calcite.Galena is mainly xenomorphic gran- ular and unequal grain embedding,some of the finer grains are scattered in the ores,while the larger grains are closely associ- ated with sphalerite and silver-bearing minerals,sphalerite is mainly xenomorphic granular,basically has no silver,a small amount in form of fine-grained star scattered in the ore,most of which are coarse-grained,in the form of vein-like,banded, veinlet-like aggregates.The presence of carbonaceous minerals in ore can lead to difficult separation of lead and zinc.In order to solve the problem of mutual inclusion and separate of lead-zinc ore,experiment research on mineral processing had been conducted.The results showed that when the grinding fineness is-200mesh accounts 65%,the low alkali process of one roughing three cleaning two scavenging was adopted to preferentially concentrate lead,and one roughing two cleaning two scav- enging was adopted to concentrate zinc,lead concentrate with 51.45%lead,1098.00g/t silver,4.89%zinc,lead recovery of 85.26%,silver recovery of 64.17%,and zinc concentrate with 53.38%zinc,84.87g/t silver,zinc recovery of 91.14%,and sil- ver recovery of 17.73%could be obtained.
作者
丁雷雷
张威
Ding Leilei;Zhang Wei(Suzhou Sinoma Design and Research Institute of Non-metallic Minerals Industry Co.Ltd,Suzhou 215151,China;Gansu Jinhui Mining Co.Ltd.,Longnan 742300,China)
出处
《金属矿山》
CAS
北大核心
2018年第11期86-90,共5页
Metal Mine
关键词
高碳
铅锌分离
低碱度
浮选
High carbon
Lead and zinc separation
Low alkalinity
Flotation
