钛钶钽矿、钽铁矿和微晶石的浮选性质

目前钽的主要来源是钽铁矿-绿柱石,锂辉石和锂辉石-锂云母化花岗岩的稀有金属伟晶花岗岩矿床。在这类矿床中,含钽矿物为钽铁矿、铌铁矿、钛钶钽矿和微晶石。伴生有价金属矿物为绿柱石、锂辉石、锂云母和锡石。这一类型的矿石都是粗粒嵌布的,可用重选方法选别后,用电磁选矿法精选粗精矿。如果考虑到具有储量大且金属矿物嵌布致     

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。     

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。      

河南某地锡锂铍铌钽矿石矿物学特征及可选性研究

为查清河南某地锡锂铍铌钽矿石性质,通过化学分析、X衍射、扫描电镜分析、能谱分析等岩矿测试技术手段,对该矿石的化学组成、矿物组成、矿物粒度和嵌布特征,以及锡锂铍铌钽元素的赋存状态进行了详细的矿物学研究。结果表明,该矿石的矿物组成极为复杂,矿物共生关系多样,粒度大小不一。有用矿物成分主要为锂辉石、绿柱石、铌钽铁锰矿、细晶石、锡石等,非金属矿物成分主要为石英、长石等。通过强磁选、重选和浮选的工艺流程,可对该矿产资源中有用成分进行综合回收利用。     

某云母矿中稀有金属赋存状态分析及云母选矿工艺研究

某云母矿含锂、铷、钽、铌等多种稀散金属,矿物成分以长石、石英、云母为主,锂、铷元素主要分布于云母矿物中,少量分布于钾长石,铌、钽元素以类质同向形式赋存于铌铁钽锰矿.矿石中云母矿物包括铁锂云母和锂白云母,呈浸染状分布,粒度较粗,探索实验研究表明重选难以有效回收.本研究确定采用浮选回收工艺,在矿石性质研究基础上,采用二次磨矿-二次脱泥-五次精选二次扫选工艺流程回收矿石中的云母矿物,可获得LiO2、Rb2O品位3.04％、0.91％的云母精矿,LiO2回收率77.80％,LiO2、Rb2O合量回收率74.26％.该研究结果可作为开发利用该类含锂、铷云母矿回收利用的基础技术依据.     

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%。     

甘肃某铷多金属矿浮选锂云母选矿试验研究

甘肃某铷多金属矿中主要矿物成分比较简单,以长石、石英、云母为主,铷主要以类质同象形式分布于钾长石、锂云母中,矿物中铌、钽主要以铁铌锰矿、钽铁铌锰矿和铌铁钽锰矿形式存在。该矿石云母嵌布粒度范围广,嵌布关系复杂,重选难以回收,本试验研究确定采用浮选回收。在对该铷多金属矿进行矿石性质研究基础上,采用磨矿-脱泥-浮选工艺流程回收矿石中的锂云母,可获得Rb2O品位0.75%,回收率为28.31%的云母精矿。该试验研究结果可作为开发利用该类铷多金属矿的锂云母回收利用的基础技术依据。     

川西可尔因地区业隆沟伟晶岩型稀有金属矿的工艺矿物学研究

以川西可尔因地区业隆沟伟晶岩型稀有金属矿为研究对象,采用化学分析、光学显微镜分析、MLA分析、电子探针分析、单矿物分析等岩矿测试手段,对矿样的结构构造、化学组成、矿物组成,锂、铌、钽载体矿物的嵌布特征,以及主要矿物的化学组成特征进行了研究,最终得出该矿样属低品位锂多金属矿。锂主要赋存形式为锂辉石,锂辉石中Li2O含量为7.21%,锂辉石中锂的配分比为87.35%。铌、钽主要赋存于铌钽铁矿系列矿物中。该矿主要利用元素为锂,伴生的铌、钽、铷均刚达到综合回收指标值,铯、铍未达到伴生综合回收的最低工业品位。     

粗长石粉中回收锂云母的试验研究

江西某钽铌矿综合回收产品粗长石粉,该矿石矿物种类繁多,矿物组成复杂。主要矿物为富锰铌钽铁矿、细晶石、高钽锡石、锂云母、锂白云母、磷锂云母、铁锂云母、钾长石、钠长石、石英、黄玉、绿柱石等。粗长石粉中含Li_2O 0.65%,具有较高的回收价值。依据试料性质,在优化条件试验的基础上,采用先磁后浮工艺流程开路试验,可得到Li_2O品位为4.22%、回收率为83.73%的锂云母精矿;闭路试验可得到Li_2O品位为3.65%、回收率为85.40%的锂云母精矿,提升了粗长石的利用价值。     

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。     

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     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。