攀西钒钛磁铁矿尾矿中战略性矿产及其综合利用

这是一篇矿物加工工程领域的论文。攀西地区是我国最大的钒钛磁铁矿资源基地,伴随着钒钛磁铁矿的开采和选冶,产生了巨量的尾矿。攀西钒钛磁铁矿尾矿中钒、钛、铁、铜、钴、镍、磷、钪等战略性元素的含量较高,具有潜在的回收价值,但尚未开展系统的选矿回收实验。通过对攀西地区红格矿区尾矿工艺矿物学的研究,拟定了尾矿中战略性元素综合利用技术路线,并开展了系统的选矿回收实验。以浮选选硫—弱磁选铁—强磁浮选选钛—强磁尾矿浮选磷为技术路线,获得了钴品位为0.175%的硫钴精矿、TFe品位56.57%的铁精矿、TiO₂品位45.97%的钛精矿、P₂O₅品位31.73%的磷精矿。研究表明,通过系统的选矿回收实验,能够减少尾矿排放量21.3%,并且,回收这些战略性矿产能获得年产值7134.89万元。因此,回收攀西地区钒钛磁铁矿尾矿的战略性矿产,具有良好的经济效益和社会效益。     

攀西低品位钒钛磁铁矿综合利用生产实践

针对攀西钒钛磁铁矿资源特点以及低品位钒钛磁铁矿综合利用技术的发展，形成了先进的选矿工艺技术方案：三段一闭路+高压辊磨超细碎、湿式筛分+粗粒磁选+强磁扫选、选铁尾矿两段强磁-磨矿分级-浮选选钛流程。攀西某低品位钒钛磁铁矿生产实践表明：低品位入选矿石TFe品位17%左右时，可以获得铁品位大于26%、回收率大于50%的满足选矿入选要求的矿石，实现低品位钒钛磁铁矿资源化利用。     

应用高压辊磨机的红格钒钛磁铁矿选矿工艺研究

采用原矿高压辊磨-粗粒湿式磁选抛尾-阶段磨矿、阶段弱磁选选铁,选铁尾矿阶段弱磁选-强磁选-浮选选钛工艺流程对攀西红格低品位钒钛磁铁矿进行选矿试验,获得了铁品位为57.41%、铁回收率为52.88%的铁精矿和TiO₂品位为47.87%、TiO₂回收率为39.31%的钛精矿。研究表明：通过采用高压辊磨技术,可使选铁过程和选钛过程磨选量分别减少34.18%和10.19%。     

钒钛磁铁矿资源选矿技术及综合利用研究进展

钒钛磁铁矿资源是以铁、钒和钛为主金属的复合型矿产资源，通常还伴生有磷、铜、钴、镍、铬、钪和（稀）贵金属元素等多种有价组分，具有非常高的综合回收利用价值。为了最大限度地综合开发和利用钒钛磁铁矿资源，从钒钛磁铁矿原矿预抛尾及选矿技术、钒钛磁铁矿精矿综合利用以及钒钛磁铁矿尾矿综合利用三个方向出发，介绍了钒钛磁铁矿资源的分选技术及综合利用研究进展情况，并针对钒钛磁铁矿资源开发的研究重点作了总结和展望。     

某难选钒钛磁铁矿选矿试验

为开发利用某钒钛磁铁矿资源,通过采集具有代表性的矿样,在矿石性质研究的基础上进行了选矿试验研究。试验结果表明:当磨矿细度为-0.074 mm 51.35%时,采用湿式弱磁筒式磁选机进行1粗1精磁选流程试验,可获得产率为24.15%,铁品位为68.73%,铁回收率为36.02%的铁精矿,实现了钛磁铁矿的有效富集和回收;针对选铁尾矿采用单一强磁、脱泥—磁化焙烧—弱磁—强磁、强磁—直接还原—弱磁工艺很难获得TiO_2含量大于47%的钛铁精矿,要实现钒钛磁铁矿资源的综合利用,仍需要先进的冶炼工艺的研发。     

国外某高品位钒钛磁铁矿综合回收选矿试验研究

国外某钒钛磁铁矿中主要有价元素TFe、TiO_2、V_2O_5含量分别达47.20%、18.68%、0.63%。根据钒钛磁铁矿矿物的选矿特性,采用弱磁选选铁-选铁尾矿重选选钛-重选尾矿再用"SLON强磁-浮选"回收细粒钛铁矿的综合回收工艺,获得铁精矿TFe品位60.03%、回收率70.03%;V_2O_5品位1.08%、回收率94.39%;重选钛精矿TiO_2品位48.17%、回收率27.64%;浮选钛精矿TiO_2品位46.64%、回收率16.12%。试验成果为评价该矿产资源综合利用的可行性提供了选矿技术支撑。     

红格钒钛磁铁矿主要元素在选矿中的分布

通过光学显微镜、X射线衍射仪、化学多元素分析等手段,对四川攀枝花红格钒钛磁铁矿的物质成分、结构与构造、以及主要元素在选矿中的分布进行了详细研究。结果表明,红格钒钛磁铁矿属高钛高铬型磁铁矿,其化学成分主要含有Fe、Ti、V、Cr、Si、Mg、Ca、Al、Cu、Co、Ni、Mn、S等元素。Fe、Ti、V、Cr在钛磁铁矿中的分配率分别为77.274%、42.228%、83.362%、95.527%,Fe、V、Cr主要赋存在钛磁铁矿中。铁精矿中Fe、Ti、V、Cr的品位分别为56.44%、11.96%、0.82%、1.76%;Fe、V、Cr随选矿富集在铁精矿中,Ti主要富集在选铁尾矿中,但仍有42.22%的Ti在铁精矿中。主要元素Fe、Ti、V、Cr的回收率均低于理论值,导致这一现象的原因有取样和分析测试误差以及选矿工艺等影响因素。该研究结果为该矿区钒钛磁铁矿的综合利用提供了重要参考依据。     

攀西钒钛磁铁矿铬元素工艺矿物学研究

对攀西钒钛磁铁矿攀枝花、白马、太和和红格4大矿区和选厂的矿样进行了详细的工艺矿物研究,认为红格作为超大型铬铁矿矿床,其铬元素的研究和利用必须与其他矿区区分。红格矿区铬有五种产出形式,铬钛铁矿含铬最高但矿物含量甚微,故铬元素主要赋存于钛磁铁矿-铬钛磁铁矿和铬钛磁铁矿中,且铬含量严格受矿石基性程度的控制,多分布于橄辉岩、辉石岩中,在以后的开发利用中需要加强对上述岩石的监测,而铬的单矿物是否会随之增加仍有待继续研究,最终方可制定合理的综合利用措施。而其他三大矿区铬元素则主要赋存于钛磁铁矿中,钛磁铁矿亦是铁精矿的主要回收矿物,结合铬元素的利用现状,认为在目前的选矿工艺下,在提高铁精矿品位和回收率的同时,钒、铬的选矿回收率也将得到提高。     

ZCLA选矿机在毕机沟钒钛磁铁矿尾矿综合回收铁、钛中的应用

毕机沟尾矿库堆存大量钒钛磁铁矿尾矿,其铁、钛矿物含量相对较高,具有很高的再回收利用价值。采用ZCLA选矿机进行1次粗粒湿式预先抛尾,可得到尾矿产率为39.16%,精矿铁、钛回收率分别为82.95%、93.22%的指标。ZCLA精矿弱磁选回收铁矿,强磁选—重选回收钛铁矿工艺流程,可获得铁精矿全铁品位为56.90%和钛精矿Ti O2品位为44.48%的合格产品,开创了一种钒钛磁铁矿尾矿库综合利用的新工艺。     

坦桑尼亚钒钛磁铁矿资源评价基础研究

正坦桑尼亚里干加(Liganga)钒钛磁铁矿资源属于钒钛磁铁矿富矿,矿石中主要金属矿物为钛磁铁矿(包括钛磁赤铁矿、钛赤铁矿)和钛铁矿,主要脉石矿物为尖晶石和绿泥石等。该矿石中有利用价值的是铁、钛、钒,其中TFe含量为51.29%,V2O5含量为0.42%。矿石中约90%的铁和钒赋存于钛磁铁矿中,对矿石选铁、钒,就是选钛磁铁矿。矿石中钛磁铁矿(包括钛磁赤铁矿、钛赤铁矿)的矿物量达到了72.33%,比中国攀西钒钛磁铁矿矿石中钛磁铁矿含量(24%~     

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。