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。     

铌钽矿选矿研究进展

铌、钽是十分重要的稀贵金属,我国铌钽资源十分丰富,但品位低、共生矿物复杂、开发利用难度高,导致铌钽选冶困难。目前,铌钽选别方法主要是重选结合其他工艺提高粗选效率;采用磁选、重选、电选、浮选、化学选矿等工艺进行精选。对细粒钽铌矿物,采用浮选工艺有较好选别效果;对精矿的除杂,采用电选工艺有较好选别效果;对于低品位难选铌钽矿,化学选矿有较好的选别效果。     

四川某铌钽矿工艺矿物学研究

从工艺矿物学角度出发,查明了四川某铌钽矿中Nb2O5的品位为0.065%,Ta2O5为0.0034%。铌主要赋存在烧绿石中,部分分布在褐钇铌矿中,少量分布在铌锰矿、铌钙矿、铈铌钙钛矿等矿物中;钽主要赋存在烧绿石等含铌矿物中。重要矿物烧绿石的粒度以细粒为主,其中-74μm占77.43%。研究表明,该矿铌钽品位较低,赋存状态多样,嵌布粒度细,属于低品位难选矿石。     

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.     

广东省广宁县某铌钽矿矿石中铌钽矿物嵌布特征及赋存状态

广东省广宁县某铌钽矿位于粤西隆起北东缘,为产于海西—印支期广宁岩体外围断裂中的中型花岗伟晶岩型铌钽矿床。为研究该矿床矿石特征、铌钽矿物嵌布特征及赋存状态,通过对矿区矿石进行系统采样,并进行了化学多元素分析、矿物组分分析、矿物扫描电镜分析以及岩石矿物显微镜鉴定分析。结果表明:(1)该矿床中铌钽的赋存形式以铌钽铁矿-钽铌铁矿为主,少量呈微细粒包裹于长石、石英、云母及黏土矿物等脉石矿物中;(2)通过对矿石中铌钽矿物嵌布特征的分析,认为矿体是由结晶分异和后期热液交代共同作用形成,其中后期热液交代作用对成矿具有进一步的富集作用。     

非洲某风化伟晶岩型钽铌矿石工艺矿物学及可选性研究

采用目前国际最先进的矿物自动定量分析系统(MLA)与传统工艺矿物学研究手段相结合的方法对非洲某风化伟晶岩型钽铌矿石进行全面详细的工艺矿物学研究。结果表明,该矿石为钽铌稀有金属矿石,钽铌主要赋存于钽铌锰矿和细晶石中,矿物中钽和铌的分布率分别为84.90%和76.30%,伴生元素锂主要赋存于云母中,矿物中锂的分布率为74.34%。根据该矿石部分泥化、钽铌矿物嵌布粒度粗、矿物密度差异明显等特点,制定了预先洗矿-分级螺旋粗选-再磨摇床精选-云母浮选的选矿原则流程,实现了资源的综合利用。      

苄基胂酸浮选钽铌矿物初探

<正> 某强钠化花岗岩钽铌矿,矿石泥化严重,且钽铌矿物—富锰钽铌铁矿、细晶石属细粒嵌布。原设计的离心选矿机-皮带溜槽和摇床回收细泥钽、铌的重选流程,多年试生产实践表明,选别指标不够理思,选别次生细泥只获得含(TaNb)_2O_514.49％,作业回收率49％的钽铌精矿。鉴于该矿石次生细泥中93％以上钽铌分布在小于0.074-0.01毫米粒级的矿石中,认为浮选是提高细泥金属回收的有效方法之一,且钽铌矿物粒度范围既适于浮选又适于离心选矿机的选别。为提高该细泥选别指标,我们对次生细泥的二次离心选矿机精矿产品(以下称原矿)用苄基胂酸浮选钽铌矿物的捕收效果进行了探索,并对以浮选为主     

在选别复合矿石时分出钽-铌铁矿粗精矿流程的简化

目前钽-铌铁矿矿石主要是用重选法选别。在钽精矿高价的情况下,由于钽-铌铁矿在大部分矿石中多半是呈细粒浸染状以及矿物的高度脆性,所以阶段重选流程就被认为是从矿石中分出钽-铌铁矿的合理流程,但是,尽管应用了阶段选别,钽-铌铁矿在粗精矿中的回收率在许多情况下不超过50～60％,此外,正为技术经济计算所指出的,从含量低     

广东某低品位钽铌铷铍多金属矿石工艺矿物学研究

以广东省某低品位钽铌铍铷多金属矿为研究对象,采用先进矿物定量检测技术与传统工艺矿物学研究手段相结合的方法,对矿石进行工艺矿物学研究,以期为多金属矿石综合回收提供指导。结果表明,本矿石属强钠长石化和云英岩化花岗岩型钽铌铍铷矿石,原矿中主要有价金属为钽、铌、铍、铷、镓和银。以钽铌铁矿矿物形式存在的钽和铌分别占总含量的68.51%、62.72%;以绿柱石和硅铍石矿物形式存在的铍分别占原矿总含量的71.01%和20.29%;赋存于云母和长石中的铷分别占总含量的74.94%和20.24%;镓主要富集在黏土矿物中,银主要以螺状硫银矿形式赋存于硫化矿物中。采用重磁浮联合选矿流程,可实现有用元素和尾矿的综合回收。      

钽铌矿的选矿技术综述

钽、铌是工业上不可替代的金属,钽铌矿普遍具有品位较低、嵌布粒度细、性脆易碎、矿物组分复杂等特点,选矿工艺往往较复杂。为促进钽铌矿选矿技术的进步,对钽铌矿选矿技术进行了综述,指出钽铌矿的粗选宜以重选工艺为主,精选多采用磁选、浮选、电选工艺;电选工艺主要用于精矿的除杂和综合回收;浮选工艺可以有效地回收钽铌细泥;化学选矿是处理低品位复杂钽铌矿的有效工艺。因此,钽铌矿的选别常采用联合工艺流程。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

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     

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.     

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.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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