重庆某萤石-重晶石矿浮选试验

重庆某萤石-重晶石矿BaSO₄和CaF2品位分别为52.57%、32.77%,主要目的矿物为重晶石、萤石,脉石矿物是方解石、石英和其他少量杂质,较为复杂难选。为回收利用矿石中的重晶石和萤石,进行了选矿试验。结果表明,相比重晶石优先浮选再浮选萤石流程,重晶石、萤石混合浮选-分离浮选原则流程指标更好。在磨矿细度-0.074 mm占75%、混合浮选以十二烷基硫酸钠为捕收剂,酸性水玻璃、栲胶和硫酸铝组合抑制剂,重晶石浮选以碳酸钠为调整剂、酸性水玻璃为抑制剂,萤石浮选以栲胶、硫酸铝、木质素磺酸钠和NaF为组合抑制剂、油酸为捕收剂,原矿经1粗1扫混合浮选-混合精矿1粗2精1扫重晶石优先浮选-重晶石浮选尾矿1粗4精1扫萤石浮选闭路流程选别,可获得产率52.44%、BaSO₄品位94.83%、回收率97.00%的重晶石精矿和产率30.33%、CaF₂品位90.06%、回收率82.86%萤石精矿,实现了可浮性相近的萤石、重晶石的有效分离,对类似矿石的开发利用具有一定的参考价值和指导意义。     

某碳酸盐型萤石矿浮选试验研究

某碳酸盐型萤石矿中方解石含量高,方解石与萤石分离较为困难。以皂化油酸为捕收剂、硫酸铝和水玻璃组合为调整剂、PG为选择性抑制剂,进行了浮选试验研究,确定了磨矿细度-0.075 mm粒级占85%、矿浆pH值6~6.5、硫酸铝用量1 200 g/t、水玻璃用量600 g/t、皂化油酸用量600 g/t、PG用量1 300 g/t等主要粗选试验条件,闭路试验获得品位97.24%、回收率70.66%的萤石精矿,很好地实现了萤石和方解石的分离。     

从某含铁萤石矿中回收铁、萤石的试验研究

针对某含铁萤石矿性质,进行先磁后浮、阶段磨矿、阶段选别工艺流程,得到Fe含量为63.53%、回收率为46.72%的铁精矿;磁选尾矿用Na_2CO_3作pH值调整剂,水玻璃作为脉石抑制剂,AY-6作为捕收剂进行萤石粗选,最终得到CaF_2品位为95.45%、回收率为63.72%的萤石精矿,较好地回收了矿石中的铁及萤石矿物。     

云南某萤石与重晶石共生矿选矿试验研究

以云南某萤石与重晶石共生矿为研究对象,该矿含萤石33.46%,重晶石52.73%,萤石与重晶石含量高。由于萤石与重晶石可浮性相近,分离难度大。为了综合开发利用该矿产资源,对该共生矿进行了选矿试验研究。试验采用了先混合浮选再分离浮选的工艺流程。混合浮选在磨矿细度-74μm占80%的条件下,调整p H值至9,以水玻璃为抑制剂、油酸钠为捕收剂将目的矿物先富集,在此过程中同时抛尾除杂,混合浮选所得精矿再进行分离浮选;分离浮选通过抑制重晶石浮选萤石实现,适宜的p H值为6,以水玻璃、硫酸铝、栲胶为抑制剂,以油酸钠为捕收剂,最终实现了萤石和重晶石的分离。通过全浮选闭路试验,得到品位为94.42%、回收率为87.77%的萤石精矿和品位为91.89%、回收率为88.66%的重晶石精矿。     

湖南某方解石型萤石选矿试验研究

湖南某方解石型萤石矿原矿含CaF256．72％,属高品位萤石矿。结合该矿石的工艺矿物学特性,采用碳酸钠为pH调整剂、水玻璃＋淀粉为抑制剂、油酸钠为捕收剂进行浮选试验研究。闭路试验在粗选磨矿细度-0．074 mm占65％的情况下,通过一粗五精一扫-粗精矿再磨的工艺流程,可以获得品位97．16％、回收率80．38％的萤石精矿,且萤石精矿中含SiO21．20％、CaCO30．65％,达到国家萤石粉F97C的质量标准。     

某低品位方解石-石英型萤石浮选试验研究

某方解石-石英型萤石矿CaF_2含量为25.32%,属低品位萤石矿。浮选试验在粗选磨矿细度-74μm占75%,粗精矿再磨细度选择为-74μm占85%的条件下,以碳酸钠作调整剂,水玻璃作抑制剂,油酸作捕收剂,采用"1粗7精2扫-粗精矿再磨"工艺流程进行闭路试验,最终得到CaF_2含量为96.33%、CaCO_3含量为0.89%,回收率为70.07%的萤石精矿。     

从内蒙古某铁选矿厂尾矿回收萤石研究

为高效利用内蒙古某铁矿选矿厂尾矿中的萤石资源,对其开展了详细的工艺矿物学分析和浮选试验研究。试验结果表明:在磨矿、磁选除铁后,采用硫酸为pH调整剂、水玻璃为抑制剂、L-1001为捕收剂,通过一次粗选九次精选二次扫选的闭路浮选流程,可获得CaF₂品位97.12%、回收率85.73%的浮选精矿,再经强磁选可获得CaF₂品位97.78%、全流程回收率78.25%的萤石精矿。      

泰国某萤石矿选矿试验研究

泰国某地区萤石矿石CaF_2品位为38.98%,主要有用矿物为萤石,主要脉石矿物为石英、水铝氟石,并含有少量方解石、云母类矿物、含铁矿物。原矿中大部分萤石嵌布粒度较细,被石英或水铝氟石包裹,属难选萤石矿石。探究了磨矿细度、调整剂用量、抑制剂用量和捕收剂用量对浮选试验的影响,优化了工艺参数。通过"分级-1次粗选-5次精选"开路浮选试验,可获得CaF_2品位分别为97.47%和92.34%的萤石精矿,开路流程总回收率分别为13.10%和25.98%。     

内蒙古某萤石矿的分选试验研究

为了优化选矿工艺,提高选矿指标,针对内蒙古某地区的萤石矿进行了选矿试验研究。确定了合适的药剂制度及选矿原则流程,其中使用了一种改性酸性水玻璃HSiO作为抑制剂,通过"一粗一扫七精"的单一浮选流程,得到萤石品位97.24%、产率22.47%、回收率81.57%的萤石精矿,以及萤石品位6.37%、回收率18.43%、产率77.53%的萤石尾矿。浮选条件试验可以得出如下结论:1随着磨矿细度的增加,萤石精矿的品位不断升高,但是其回收率不断降低;2随着酸性水玻璃用量的不断增加,萤石精矿的品位也是不断升高,回收率是不断降低;3随着捕收剂油酸钠用量的不断增加,萤石精矿的品位不断降低,回收率不断升高。     

某低品位萤石矿选矿工艺研究

某低品位萤石矿含Ca F2为25.20%,在磨矿细度-0.075 mm含量70%的条件下,采用碳酸钠为p H调整剂、常规水玻璃和酸化水玻璃为抑制剂、油酸为捕收剂,经过一次粗选—粗精矿一次精选脱泥—五次精选,可获得产率为15.93%、Ca F2品位98.27%、回收率为62.37%的高品质酸级萤石精矿产品1;中矿集中处理,经过三次精选,可以获得产率为6.20%、Ca F2品位82.73%、回收率为20.44%的冶金级萤石精矿产品2,萤石总回收率达到82.81%。精选添加酸化水玻璃,有助于提升萤石精矿的品级。     

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