四川壤塘锂多金属矿石选矿试验研究

四川壤塘锂多金属矿石中主要有用矿物为锂辉石,具有综合回收价值的矿物为钽铁矿、铌铁矿和锡石。根据钽铌铁矿及锡石与锂辉石和脉石矿物的密度差异、钽铌铁矿与锡石的磁性差异以及锂辉石与脉石矿物的可浮性差异,采用分级重选—磁选—浮选联合工艺流程进行选矿试验,获得了锂精矿、钽铌精矿和锡精矿,使矿石中的有价元素得到了较好的综合回收。锂精矿Li2O品位为5.53%,Li2O回收率为72.68%;钽铌精矿Ta2O5和Nb2O5品位为17.00%和32.55%,Ta2O5和Nb2O5回收率为59.38%和66.05%;锡精矿锡品位为52.16%,锡回收率为80.00%。     

超声波辅助NaCl-MnO2改性沸石及其吸附性能

本文的研究对象为四川某锂辉石矿,矿石属伟晶岩型低品位锂辉石矿,矿石中Li2O含量为1.36%。主要矿物组成简单,为锂辉石、石英、长石等,粒度粗大。主回收元素锂主要分布于锂辉石中,锂辉石中锂的分布率为96.6％,锂辉石本身含铁0.15％。加之部分锂辉石发育的解理缝、裂缝中被铁锰质充填污染,易对锂辉石品级造成影响。共伴生的锡、铌、钽主要以锡石、铌铁矿、重钽铁矿存在,嵌布于锂辉石、石英、长石粒间,粒度细小,与主要矿物粒度差异巨大,是否综合回收应从经济效益角度考虑。     

新疆某伟晶岩型锂多金属矿石中伴生元素的回收试验

新疆某伟晶岩型锂多金属矿伴生钽铌锡等有价元素,其中钽铌主要以钽铌铁矿的形式存在,锡主要以锡石的形式存在。为提高伴生元素的回收率,根据矿石性质最终确定了粗磨—重选预富集—强磁选—离 心分离的原则工艺流程,并开展了相关条件试验研究。重液分析确定重选适宜的入选粒度为-0.35 mm,在此条件下,通过螺旋溜槽粗选—摇床精选工艺实现了钽铌锡预富集。对预富集精矿进行锡石与钽铌铁矿的强磁 选分离,适宜的工作参数为磁场强度800 mT、脉动频率260次/min。非磁性产品主要为锡石和锂辉石,在冲洗水量2.0 L/min、给矿浓度30%、给矿量1.0 kg/min的条件下,确定离心选别适宜的重力加速度为50G。根据 条件试验确定的工艺条件,进行螺旋溜槽粗选—摇床精选—弱磁选—强磁选—离心重选全流程试验,最终获得了Ta2O5品位13.90%、Nb2O5品位29.14%、Ta2O5回收率49.50%、Nb2O5回收率58.37%的钽铌精矿及Sn品位 41.45%、Sn回收率54.39%的锡精矿,有效实现了伴生有价矿物的综合回收。     

四川措拉锂多金属矿的矿物学特征研究

本文利用显微镜下鉴定、扫描电子显微镜(SEM)、X射线衍射分析(XRD)等分析测试手段对四川甲基卡西矿段的措拉锂多金属矿开展了详细的矿物学研究。研究结果显示,矿石矿物以锂辉石为主,少量的磷锂铝石、锂云母,副矿物为铌铁矿、铌钽铁矿、锡石等；脉石矿物以长石类、石英为主,次为云母类,副矿物有磷灰石、绿泥石等。矿石中锂主要赋存于锂辉石中,伴生有铌、钽、铷等有益组分,均达到综合回收指标值；选冶试验表明,主要矿石矿物锂辉石可选别利用外,其伴生有价元素如铌、钽等可实现综合回收利用。综上所述,该锂矿具有重要的开发利用价值。      

某复杂低品位铜锌硫化矿工艺矿物学研究

针对某复杂低品位铜锌硫化矿,为降低选矿成本及为生产提供指导依据,进行了工艺矿物学研究。采用化学多元素分析、矿物自动分析仪(MLA)、光学显微镜等分析手段,查明了矿石的元素组成及矿物组成、主要矿物的嵌布特征、共生关系、粒度分布及解离度特征。结果表明,矿石中Cu品位为0.60%,锌品位为0.25%;含铜矿物主要为黄铜矿,含锌矿物主要为闪锌矿;铜锌硫矿物嵌布关系复杂,嵌布粒径大小悬殊,主要矿物单体含量低,黄铜矿及闪锌矿的单体解离度分别为37.92%、32.43%、单体解离度不高;矿石中存在极细粒黄铜矿且细粒级黄铜矿包裹于黄铁矿、磁铁矿、闪锌矿、脉石中导致铜回收困难,部分闪锌矿粒度极细且铜锌硫矿物共生关系紧密,相互包裹,共同赋存于脉石中导致铜锌分离困难。     

某多金属硫化矿锡的工艺矿物学研究

运用化学分析、实体显微镜、透光显微镜、反光显微镜以及X射线衍射仪、X射线能谱仪、扫描电镜等分析方法和测试手段对云南某多金属硫化矿中的有用有害杂质元素含量、矿物组成,锡主要赋存矿物的单体解离度、工艺结晶粒度、嵌布特征以及锡的赋存形式进行了查定、分析。结果表明,在对矿石中的有价元素锡进行回收时,应确定合适的磨矿细度,使呈毗连嵌镶或包裹嵌镶形式嵌布于脉石矿物中的锡石充分单体解离,采用重浮联合选矿工艺才能有效地回收与富集矿石中的锡金属,从而提高锡金属的选矿回收率。     

江西宜春钽铌矿矿物学特性及钽铌赋存状态研究

采用MLA与传统的工艺矿物学研究方法相结合的方式,详细研究江西宜春某强钠长石化花岗岩型矿石中钽铌矿物的矿物学特性和钽铌的赋存状态。研究表明,钽铌矿物以钽铌锰矿和细晶石为主,其次为锡锰钽矿,矿石中钽铌元素主要以独立矿物、类质同象和包裹体三种形式存在。以独立矿物的形式赋存于钽铌矿物中的Ta2O5和Nb2O5分别为79.40%和57.70%,从原矿中分选钽铌矿物,可获得理论品位Ta2O5 56.76%,Nb2O5 18.67%的钽铌精矿。     

BPMA在某低品位铌钽矿工艺矿物学研究中的应用

本文探讨了某低品位铌钽矿的工艺矿物学.通过化学分析、BPMA各项分析,查明了矿石中的主要矿物、有用矿物、铌钽的赋存状态、矿物粒度及嵌布特征.研究表明,该铌钽矿主要有用元素为铌钽,由于铌、钽品位低,分散于榍石中的铌钽占比较高却又无法利用,铌铁矿、铌钙矿和褐钇铌矿则由于粒度极微细,细磨很难使其单体解离,因此该矿石中的铌、钽很难有效回收.     

湖北某地铌钽铁矿工艺矿物学研究

这是一篇工艺矿物学领域的论文。锂、铍、铌、钽等稀有金属作为国家战略性新兴资源，主要应用于国防、航空、航天等工业领域，近年来备受地质学家的关注。湖北某地铌钽铁矿为含铌粗面质火山岩及火山碎屑岩矿床，本文对该矿石进行了系统的工艺矿物学研究，查明矿石中主要含铌的矿物有铌铁矿，铌铁金红石、赤褐铁矿和钛铁矿、黄铁矿等，铌铁矿为该矿石选别铌精矿的主要回收矿物。大部分铌矿物嵌布粒度均小于0.04 mm，铌铁矿粒度微细，多为0.5～8μm，但在-0.037 mm 90%时单体解离度可达71.11%，可考虑用磁选方法分离铌铁矿和脉石矿物；矿石中脉石矿物以绢云母、斜长石为主，磨细后泥化严重，应注意泥级物质团聚对选矿实验的影响。     

东秦岭某稀有金属矿石的工艺矿物学与主要矿物的回收工艺

对东秦岭某稀有金属矿的工艺特性进行了研究,确定了矿石的物质组成、结构构造、主要矿物的嵌布特征和粒度分布,对矿石中的有用矿物进行了选矿探索试验。结果表明:矿石中Nb_2O_5+Ta_2O_5含量为0.050%,伴生的Li、Be、Rb和Cs等元素可考虑综合回收;钽铌矿选矿采用磁选—重选联合流程回收(磁选富集铌铁矿和钽锰矿,重选富集钽铁矿、细晶石和烧绿石),最终获得Nb_2O_5和Ta_2O_5含量分别为20.728%和50.462%、回收率分别为28.82%和33.99%的铌钽精矿;锂矿物选矿采用浮选环境为中性的自主研发药剂,通过1粗1扫3精浮选流程处理,可获得Li_2O含量为1.65%、回收率为31.31%的锂精矿。鉴于长石以钠长石为主,且多含微细粒包裹体,大部分未解离,很难获得合格精矿,而锂尾矿Cs_2O和Rb_2O含量分别为0.20%和0.16%,经济价值较高,建议直接采用焙烧—水浸法工艺进行回收。     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new