重晶石型复杂嵌布铜铅锌次生硫化矿的可选性研究

某铜铅锌次生硫化矿含大量重晶石,有用矿物嵌布关系复杂、粒度细,铅氧化率28.32%。矿石中的方铅矿和闪锌矿因夹杂细小铜矿物而自活化,抑制分离浮选困难,常规选矿方法和药剂难以分离出单一铜、铅、锌精矿。试验建议采用粗磨铜铅锌等浮流程,可获得铅+锌品位大于50%的含铜铅锌混合精矿,各金属回收率也较高。混合精矿再用专利冶金方法处理。     

高金铅锌矿浮选新工艺试验研究

依据矿石性质和金的赋存特征,本试验在自然pH状态下,应用NHL-1诱导活化金,采用25号黑药和乙基黄药浮选铅和金,得到含金高的铅精矿。闭路试验获得铅精矿含铅45.2%、含金108.4g/t,铅的回收率为82.57%、金的回收率达到91.7%。试验表明NHL-1具有良好的活化效果,添加NHL-1 240g/t时金的回收率比没有添加活化剂提高22.0%。最终工业试验获得铅精矿含金106g/t、金回收率90.4%的生产指标。     

BK906及MB在铅锌矿浮选生产中的应用

陕西震奥鼎盛矿业有限公司铅锌选厂在铅锌矿浮选生产原工艺以乙硫氮、丁基黄药作为捕收剂,原药剂制度下铅精矿回收率偏低,锌精矿回收率波动大,铅锌互含率偏高,且石灰用量大,影响回水质量,并污染环境。自2011年起,原矿品位下降,黄铁矿含量上升,为了抑制黄铁矿上浮,不得不加大石灰用量。针对以上问题,企业将方铅矿捕收剂调整为弱碱性下捕收效果良好的BK906,闪锌矿捕收剂调整为MB。一年来的生产结果表明,BK906与MB配合使用,能在原矿品位下降的情况下,有效提高铅与锌的回收率,降低铅锌互含率,石灰用量由过去的10kg/t降低至5kg/t,具有良好的环保效应。     

国外某复杂低品位铅锌矿选矿工艺优化及应用

某铅锌矿原矿铅含量为1.26%,含锌6.53%,含硫30.38%。生产上采用“铅锌依次优先浮选-中矿顺序返回”工艺流程,生产指标为铅精矿铅品位50.69%,含锌12.61%,铅回收率75.53%,锌精矿锌品位48.77%,含铅1.59%,锌回收率73.91%。铅锌互含较高,锌精矿指标不理想。为了解决该问题,本文在了解现场生产工艺流程及矿石性质的基础上,针对该铅锌矿开展了详细的选矿工艺优化试验,通过对部分药剂制度进行优化,采用特效捕收剂BK-LY11,同时在锌浮选回路采用中矿再磨工艺,显著改善了铅锌互含情况,有效提高了铅锌选别指标,并成功应用于生产实践,优化后获得的铅、锌回收率分别提高了5.83、8.46个百分点。     

新型捕收剂KZ在氧化铅锌矿浮选中的应用

氧化铅锌矿的选矿是国内外选矿界公认的难题。经过大量的设计、复配研究,成功开发了氧化锌新型捕收剂,获得了锌精矿品位35.09%、回收率86.69%指标,达到了国内先进水平。     

氧化铅锌矿利用工艺技术研究进展

本文分析了氧化铅锌矿石的主要特点及对应的选别工艺,综合评述硫化浮选、絮凝浮选、螯合剂浮选、选冶-联合工艺以及原浆浮选技术等处理方法,为氧化铅锌矿的开发利用提供技术参考。氧化铅锌矿的开发利用,应在加强矿石性质研究及浮选理论研究的基础上,注重组合新药剂、联合新工艺、新设备及新技术方法的应用,以期取得更大的进展。     

Wetting agent investigation for controlling dust of lead-zinc ores

The purpose of this project is to control the pollution of dust,which occurred in a typical lead-zinc mine.Two kinds of surfactants and water glass were chosen as the wetting agents to study the behaviours of suppressing the dust.The performances of the wetting agents of various sizes and water content of dust and their compositions among different weting agents were investigated. Firstly,the chemical compounds,dispersity,water content,bulk density and other relevant physico-chemical properties of the choiced dust of lead-zinc ore were mensurated.A great number of down-ward penetrating tests were conducted to different partical sizes of dust and to analyze the dust wetting behaviour respectively.The optimal compositions of wetting agents were obtained in accordance with different water contents and partical sizes of the dust after analyzing and statisting the achieved experimental data. The data show that the efficiency of chemical dust suppression of weting agents is much better than that of water.The results of the research work prove that the partical size and the water content of the dust are very important factors to the dust suppression.The results are also proved validly by the dropping experiment,which takes the penetrating diameter and penetrating time as the major factors.The superfine dust is much more difficult to be wetted.Since increasing the water content of dust is the best approach to control it,the choice of wetting agents for improving dispensation is significant.     

三江(云南段)铜金多金属找矿问题思考之二

从三江（云南段）现已探明和发现的大中型铜、金、铅锌矿床分布现状分析,该区域成矿规律为：喜山期是中大型矿床主要成矿期,控矿因素以构造为主;深源热卤水沿构造通道上升,在适宜的聚矿构造环境成矿或改造叠加成矿     

锑精矿中金的湿法测定

采用HCl预处理样品,过滤除去Sb,残渣中的Au经王水封闭溶样分解后,以活性炭分离一原子吸收测定[1].对w(Au)=22.5×10-6和w(Au)=84.0×10-6的样品平行测定10次,平均值为w(Au)=22.7×10-6和w(Au)=83.4×10-6,RSD为1.17%和0.46%.该方法加入标准样品回收率为98.4%～101.2%.