西藏某超低品位铜钼矿强化浮选工艺技术研究

西藏某铜钼矿铜品位0.29%,钼品位0.0082%,属超低品位铜钼矿。该矿石中主要金属矿物有黄铜矿、辉钼矿、黄铁矿等,脉石矿物主要有石英和白云母。根据矿石性质,本文研究在粗选时使用新型高效硫化矿捕收剂BKAP,精选时使用新型高效黄铁矿抑制剂BKYN,采用全开路-多次粗选工艺流程,对矿石中的含铜矿物进行强化浮选捕收,最终实验室小型闭路试验获得了铜品位20.11%,铜回收率80.43%的铜精矿,其中含钼0.51%,钼回收率73.18%。     

某细晶型低品位钼矿综合回收试验

河南某钼矿石属于浸染状细晶型钼矿,矿石中Mo品位为0.12%、含Cu 0.04%、含S 2.32%,含量均较低,综合回收难度较大。为有效回收利用矿石中的有价金属,进行了选矿试验研究。工艺矿物学研究表明,矿石中的主要可回收的金属矿物为辉钼矿、黄铁矿和黄铜矿;矿石中的辉钼矿以细板片状、针柱状被石英包裹,粒度细小;黄铜矿与脉石矿物嵌布关系密切,粒径为0.02～0.05 mm;黄铁矿中常包含乳滴状黄铜矿或细粒磁黄铁矿,粒径为0.10～0.70 mm。基于矿石特性,选取实验室研制的辉钼矿捕收剂团聚油、铜抑制剂TY以及非硫化矿抑制剂EMY-01,采用"阶段磨矿浮选分离铜钼—铜钼分离尾矿浮选富集铜—选钼尾矿浮选硫"闭路试验流程,最终获得了Mo品位49.73%、Mo回收率91.17%的钼精矿,S品位50.75%、S回收率90.78%的优质硫精矿,以及Cu品位16.20%、Cu回收率36.45%的铜精矿,指标优异,实现了该细晶型钼矿中有用矿物的分离回收。     

工艺矿物学在黑龙江某低品位铜钼矿中的应用

黑龙江某低品位铜钼矿平均含Mo 0.026%,含Cu 0.015%,属低品位矿。由于矿石含钼、铜较低,为降低选矿成本,有效回收有价金属,对矿石进行详细的工艺矿物学研究。研究发现,主要金属硫化矿有辉钼矿、黄铜矿、黄铁矿、磁黄铁矿等,主要脉石矿物有钾长石、斜长石、石英等。辉钼矿主体嵌布粒度在0.01～0.5 mm,约49.44%,属于微细粒级-细粒级嵌布。黄铜矿主体嵌布粒度在0.02～0.25 mm,多属于微细粒-细粒级嵌布。此外辉钼矿与黄铜矿彼此共生关系密切、黄铜矿可浮性好,造成铜钼分离困难。根据工艺矿物学研究结果,建议采用“快浮+粗选”工艺流程,钼精选强化对黄铜矿的抑制,并增加精扫选作业,有效降低了钼精矿中铜的含量,且实现了铜的综合利用。     

内蒙古某大型铜钼矿新型捕收剂试验研究

内蒙古某铜钼矿属于低品位大型斑岩铜钼矿,矿石主要有用矿物为黄铜矿、斑铜矿、蓝辉铜矿、铜蓝和辉钼矿。现场工业生产中铜钼回收采用铜钼混合优先(对黄铁矿)流程,流程相对简单。随着矿石性质的不断变化,原有药剂制度对现有矿石适应性变差,铜钼回收率目前均有不同程度的下降,特别是钼回收率下降较为明显,钼回收率在30%～60%间波动。为了提高铜和钼的回收率,进行了药剂制度优化试验。药剂制度优化后采用捕收剂BK925代替原有捕收剂,可实现铜钼的高效回收,铜钼回收率均可在87%以上。     

低品位共伴生硫化铜钼矿选矿试验研究

本研究以蒙古某低品位铜钼矿为研究对象,以该试样中铜钼矿物的矿石性质特征分析为基础,通过粗选、精选条件影响及流程方案对比等试验研究,获得了阶段磨矿-铜钼等可浮工艺综合回收铜钼矿物的推荐方案。试验研究结果表明,该矿石中部分目的矿物以微细粒,或以复杂连生体赋存,且含磨矿易泥化的脉石矿物较多;且铜钼分离作业产出合格的钼精矿,主要依赖于铜钼混合精矿品质;为获取较优的品质铜钼混合精矿,以阶段磨矿调控目的矿物有效解离,以药剂制度调节铜钼等可浮过程,在优化铜钼混合浮选条件下,得到的铜钼混合精矿中Cu品位高于25%、Mo品位高于1%,Cu、Mo回收率大于88%的试验指标,实现了铜钼矿物的高效回收,为该类型铜钼矿资源开发利用提供参考。     

芳香烃与磷化物协同分选低品位铜钼矿

针对内蒙古某大型低品位铜钼矿存在品位低、嵌布粒度细、铜钼矿石难选、金属量流失严重等问题,提出采用特殊的高沸点芳香烃与含磷化物协同作用提高低品位铜钼矿精矿回收率。利用激光粒度分析、XRD测定了低品位铜钼矿的矿物特点;利用气质联用技术和IR技术分析捕收剂结构和药剂在硫化矿表面的吸附特征,对原矿铜品位为0.241%、钼品位为0.0362%的低品位铜钼矿进行一粗三精三扫浮选试验,得到混合粗精矿铜品位为17.24%、钼品位为2.44%,铜回收率从88.35%提高到91.57%,钼回收率从75.79%提高到86.28%。试验证明芳香烃与含磷化物的协同作用在黄铁矿存在下对铜钼具有高选择性,为低品位铜钼矿浮选提供了参考。     

辉钼矿综合回收选矿试验

某含辉钼矿矿石,有用矿物主要有辉钼矿、黄铁矿和黑钨矿,根据其矿石性质,对钼浮选过程中脉石矿物抑制机理进行了分析,提出＂依次浮选—强磁选＂的工艺流程,获得了钼精矿品位45.33%,回收率80.49%;硫精矿品位45.83%,回收率92.74%;钨精矿品位58.67%,回收率74.63%的良好指标。     

辉钼矿综合回收选矿试验

某含辉钼矿矿石,有用矿物主要有辉钼矿、黄铁矿和黑钨矿,根据其矿石性质,对钼浮选过程中脉石矿物抑制机理进行了分析,提出“依次浮选-强磁选”的工艺流程,获得了钼精矿品位45.33%,回收率80.49%;硫精矿品位45.83%,回收率92.74%;钨精矿品位58.67% ,回收率74.63%的良好指标。     

青藏高原某斑岩型铜钼矿选矿试验

青藏高原某特大斑岩型铜钼矿资源储量丰富,铜钼分离困难导致其中钼资源未得到有效利用。为综 合回收矿石中铜、钼等有价金属元素,确定该矿石最佳的选矿工艺流程及药剂制度,在工艺矿物学研究的基础上进 行了选矿试验研究。结果表明,矿石中铜品位为 1.21%,钼品位为 0.040%;矿石中主要铜矿物为辉铜矿和黄铜矿, 辉铜矿中铜占总铜的 82.80%;辉钼矿是矿石中钼的主要赋存矿物,以单体形式存在;矿石中的脉石矿物主要为长 石和石英;试样在最佳的药剂制度下,采用“铜钼混合浮选—混合精矿再磨—铜钼分离”的工艺流程,经 1 次混合粗 选、1 次混合精选和 2 次混合扫选得到铜钼混合精矿,混合精矿再磨进行铜钼分离粗选,分离粗选精矿经 6 次精选 得到钼精矿,1 次分离扫选得到铜精矿,最终获得含铜 26.46%、含钼 0.071%,铜回收率 92.06% 的铜精矿,含钼 46.400%、含铜 1.28%,钼回收率 75.40% 的钼精矿。试验指标良好,实现了铜钼的有效分离。     

新型抑制剂在低碱条件下实现铜硫高效分离的试验研究

针对铜硫浮选分离过程中,大量添加石灰引起的管道堵塞、矿浆环境差等问题,开发了一种新型黄铁矿抑制剂BY,应用于缅甸某硫化铜矿浮选试验并获得了良好的指标。该矿石含铜1.40%、硫8.95%,主要含铜矿物为黄铜矿,含硫矿物为黄铁矿和磁黄铁矿。采用抑制剂BY通过一粗两精一扫的浮选工艺流程,获得的铜精矿Cu品位为25.13%、回收率为93.47%,S品位为33.97%、回收率为19.93%。与石灰相比,精矿中铜品位和回收率分别提高了0.99和0.16个百分点,硫品位和回收率分别降低了1.01和2.14个百分点,闭路试验粗选pH值可由12降低至9.7,可实现低碱环境中铜硫的高效分离。     

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