四川德昌大陆槽稀土矿工艺矿物学

大陆槽稀土矿是川西冕宁-德昌稀土成矿带著名的大型稀土矿,矿石不仅富集轻稀土,而且伴生铅、锶、钡、萤石可供综合利用。本文对大陆槽稀土矿矿石进行了系统的工艺矿物学研究,查明矿石的稀土矿物主要为氟碳铈镧矿,分布在萤石、方解石、重晶石、天青石等矿物粒间或被其包裹。由于氟碳铈镧矿与长石、石英、碳酸盐矿物、萤石及褐铁矿等矿物密度差异大,粒度较粗,可采用重选分离;重晶石、天青石的比重与氟碳铈镧矿相同,但不具有电磁性,可采用磁选方法与氟碳铈镧矿分离。     

“石油催化裂化用关键稀土催化材料”课题通过验收

日前,863计划新材料技术领域"石油催化裂化用关键稀土催化材料"课题在洛阳市顺利通过验收。课题开发了固相离子交换制备稀土镧改性Y型分子筛技术,形成了年产1000吨催化裂化催化剂生产能力,稀土利用率从     

稀土改性蛭石的制备及吸附Cu2+性能研究

以蛭石为原料,稀土钇、镧、铈为改性剂,制备稀土-蛭石复合吸附剂,用以处理含Cu2+废水。确定了改性蛭石的最佳制备条件为：稀土铈为改性剂,改性剂质量分数为0.2%,蛭石粒度为150μm;通过FTIR和XRD对改性前后的蛭石进行结构表征,结果表明,铈的掺入没有改变蛭石的原有结构,只是促使蛭石晶粒变小,并在其表面和层间引入了一定数量的羟基化合物,使其吸附性提高。铈-蛭石处理含Cu2+废水的最佳反应条件是：溶液pH值为5~7,吸附时间为60 min,吸附剂投加量为30 g/L,在该条件下铈-蛭石吸附剂对533 mg/L含Cu2+废水的Cu2+吸附率可达99%以上。     

加快镧镨铈新型混合稀土金属（LPC）的应用

镧镨铈新型混合稀土金属（LPC）是利用提铈提钕后库存滞销的LPC氯化稀土研制的新产品。它的推广应用有助于解决国内外关注的镧镨铈大量积压的问题。目前LPC可替代富铈混合稀土作镍氢电池负极材料。LPC用于生产微合金化钢材，能显著提高其物理和机械性能。LPC用于有色金属合金作添加剂，例如：铝合金、铜合金、锌合金等中加入LPC，能起到净化、细化组织和变质作用。     

越南都巴奥强风化型稀土矿分选工艺

都巴奥氟碳酸铈镧矿(bastnaesite)矿床位于越南最北部的莱州(Lai Chau)区内。由于风化严重,氟碳酸铈镧矿与大量萤石和重晶石共生矿石难以处理。实验室和半工业试验结果表明,淋洗和分级技术是稀土矿加工处理过程中最关键的第一步。淋洗后的产物含氧化稀土30%,回收率为63%。由于这种低品位氟碳酸铈镧矿精矿具有特殊的性质,所以必须研究出了一种可以在工业上采用的新型冶金工艺过程。该工艺的特点是用硫酸作精矿的淋洗剂,在实际生产中借助一些转筒使精矿呈固体状态,这时温度仅为200—300℃。此外,该工艺还包括两个附加作业,其一是重晶石浮选,以生产用于钻井品级的重晶石,另外一个则是通过高梯度磁选生产出第二种稀土,产品含氧化稀土33%。两种氟碳酸铈镧矿精矿混合到一起留待进一步冶炼处理。     

包头稀土研究院三个课题顺利通过验收

近日,包钢稀土组织专家组对包头稀土研究院火法室承担的"稀土镁中间合金产业化关键技术开发"、"氧化物制备稀土金属节能环保技术的研究"、"氧化物电解制备混合稀土金属工艺的研究"三个立项课题进行验收。三个课题组代表首先向专家们介绍了各自承担课题的情况,从立项背景、意义、研究目的、采用方法和材料、研究结果等方面进行了详实的介绍。其中"稀土镁中间合金产业化关键技术开发"主要建立了镧镁、铈镁、镧铈镁、钕镁和钇镁等     

稀土催化材料的应用进展

众所周知，我国稀土矿以轻稀土组分为主，其中镧、铈等组分约占60％以上。随着我国稀土永磁材料、稀土发光材料、稀土抛光粉、稀土在冶金工业中等应用领域逐年扩大，国内市场对中重稀土的需求量也快速增加。造成了高丰度的铈、镧、镨等轻稀土的大量积     

FCC汽油醚化评价自动控制系统的研究

FCC汽油醚化评价系统是要考察醚化反应过程催化剂的反应性能、筛选催化剂。结合项目开发实际,介绍了FCC汽油醚化评价自动控制系统的开发设计,从满足FCC汽油醚化评价工艺的要求出发,系统阐述了控制系统的结构和特点以及控制策略及实现功能等方面内容。     

氢氧化铈、碳酸镨钕产品通过鉴定

江西省稀土研究所的新产品氢氧化铈、碳酸镨钕于1999年12月通过江西省科委的省级重点新产品鉴定。 该所的氢氧化铈产品经2年多时间开发研制,并在生产过程中逐步满足用户不断提出的各种要求,现已大批量生产。产品中的高铈含量、酸溶性、氯根含量等指标明显优于国内同类产品,产品的直收率>92％,综合收率>97％,各项技术经济指标达到国内领先水     

日本稀土市场状况

1.2011年日本铈和镧的国内用量将比上一年减少20%～30%2010年日本铈化合物进口量(氧化物及其他化合物合计)为13892吨比2009年增加53%,氧化镧进口量3601吨同比增长254%。虽然中国稀土出口总量下降,但对日本出口铈化合物3709吨,比2009年增长4%,出口氧化镧2870吨,同比增长146%。预计2011年日本氧化铈和氧     

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     

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     

2014 second batch of rare earth quota released

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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