摩擦研磨对细颗粒磁铁矿磁选效率的影响

采用摩擦研磨—磁选的工艺以提高选别细颗粒磁铁矿的能力。铁品位为66.02%的铁矿经一次干式研磨磁选选别后获得铁回收率为99.23%,铁品位为67.40%的铁精矿;经8次湿式研磨磁吸选别后获得铁回收率为98.33%,铁品位为68.91%的铁精矿。铁品位为45.52%的铁矿经"8次湿式磁选+8次湿式研磨磁选"选别后获得铁回收率为90.97%,铁品位为69.89%的铁精矿。     

某铁矿细粒难选铁矿石磁选工艺研究

山东省某大型铁矿主要有用矿物为磁铁矿,少见黄铁矿等。磁铁矿呈自形、它形晶体状分布,嵌布粒度微细,采用四段磨矿—粗精矿再磨再磁选工艺选别该铁矿石,铁精矿TFe品位只能达到62%;使用搅拌磨对铁精矿进行再磨后磁选,当再磨粒度为d90=22μm时,铁精矿TFe品位可达65%。     

贵州某难选低品位褐铁矿选矿工艺试验

贵州某低品位褐铁矿主要以针铁矿、菱铁矿和少量磁铁矿、黄铁矿形式存在,属于难选铁矿石,常规的磁选、浮选、磁化焙烧—弱磁选均不能获得满意的指标。试验采用氯化还原焙烧—弱磁选工艺流程处理该矿石,获得了铁精矿品位为60.96%,回收率为87.16%的良好指标,为该矿石的开发利用提供了新思路。     

某磁赤褐铁矿选矿试验研究

某铁矿原矿品位46.16%,铁矿物主要以磁铁矿和赤褐铁矿形式存在,有害元素硫含量偏高。基于原矿性质分析结果,采用磨矿—弱磁选—强磁粗选,粗精矿细磨精选—摇床扫选的工艺流程处理,获得了铁品位和铁回收率分别为64.73%和16.51%的磁铁矿精矿、及铁品位和铁回收率分别为56.51%和46.58%的赤褐铁精矿,两种铁精矿含硫量均不超标。     

河南某铁矿磁选工艺的研究

河南某铁矿主要含磁铁矿和镜铁矿,针对该铁矿磁铁矿嵌布粒度较粗、镜铁矿嵌布粒度较细的矿石性质,采用永磁筒式磁选机回收磁铁矿,SSS-I高梯度磁选机回收镜铁矿.在原矿铁品位为27%时,采用阶段磨矿阶段磁选工艺,获得铁精矿品位64.22%、回收率75.0%的指标.     

印度尼西亚某海滨砂铁矿选矿工艺研究

对印度尼西亚某海滨砂铁矿原矿性质进行研究。该矿原矿铁品位为43.25%,铁矿主要以磁铁矿形式存在,原矿粒度较细,单体解离度较好。采用三种不同试验方案进行试验,即原矿不磨,直接磁选;磨矿—弱磁选;磨矿—弱磁选—强磁选—重选,分别获得铁精矿品位为56.53%,回收率为79.03%;铁品位为59.19%,回收率为85.56%;铁品位为59.20%,回收率为88.05%的指标。此研究为印度尼西亚的海滨砂矿的开发利用提供了参考。     

菲律宾某海滨砂铁矿石选矿试验研究

菲律宾某海滨砂铁矿石中铁含量为14.67%,主要以磁铁矿的形式存在。采用湿式预选抛尾—磨矿—磁选工艺处理该矿石,获得了铁品位为60.41%、回收率为84.54%的铁精矿,实现了该海滨砂铁矿石的有效分选,为此类铁矿资源的开发利用提供参考依据。     

国外某低品位含硫磁铁矿选矿试验

为合理开发国外某低品位含硫磁铁矿,根据该铁矿石的性质特点及国内外类似铁矿选矿生产实践,进行了原矿(10~0 mm)湿式粗粒磁选预选抛尾—阶段磨矿—弱磁选—浮选脱硫工艺试验。试验获得了产率为45.37%、铁品位为65.39%、硫含量为0.22%、铁回收率为82.44%的铁精矿,还获得了产率为3.86%、铁品位为61.92%、硫含量为2.59%、铁回收率为6.64%的次铁精矿,选别指标较好,为该类含硫磁铁矿石的开发利用提供了技术依据。     

霍邱某低品位磁铁矿石选矿试验

霍邱地区某低品位磁铁矿石铁品位为23.30%,铁主要以磁铁矿的形式存在。为合理开发利用该铁矿资源,在分析矿石性质的基础上,对其进行选矿试验研究。采用阶段破碎—阶段抛废—磨矿(-0.076 mm占55%)—弱磁选流程,最终可获得产率为25.30%、铁品位为66.25%、回收率为71.91%的铁精矿,分选效果较好,可作为该矿石的开发利用流程。     

甘肃某微细粒铁矿的选矿试验研究

甘肃某铁矿以磁铁矿石为主,在最终磨矿细度-0.038 mm为98.9%时,经三段磨矿五段弱磁选、反浮选可将铁品位提高至61.02%,SiO2含量11.25%,但铁回收率低,选矿成本高。采用弱磁—反浮选回收磁铁矿、弱磁尾矿强磁抛尾—直接还原—弱磁选的联合流程,铁精矿品位可达66.68%,回收率为69.92%。     

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