内蒙古某钽铌稀有多金属矿综合利用试验研究

针对内蒙古某钽铌稀有多金属矿,采用光薄片鉴定、X-衍射分析、扫描电镜及能谱分析、电子探针分析等方法对其进行了详尽的工艺矿物学研究,查明了金属矿物主要为钽铌铁矿、锡石、细晶石等,非金属矿物主要为钠长石、石英和天河石。通过详细试验研究,确定采用“一段磨矿—强磁分选—分级摇床—摇精回收钽铌—酸洗除铁—摇尾回收锂铷云母—强磁尾矿综合回收长石云母”的选冶联合工艺,最终可获得(Ta, Nb)₂O₅品位为60.15%、回收率为21.70%的钽铌精矿1,(Ta, Nb)₂O₅品位为30.35%、回收率为3.17%的钽铌精矿2,Li₂O品位0.89%、回收率为58.98%的锂铷云母精矿1(Rb₂O品位0.34%、回收率为11.70%,云母含量为92%),Li₂O品位0.60%、回收率为5.59%的锂铷云母精矿2(Rb₂O品位0.28%、回收率为1.35%,云母含量为93%),Na₂O品位6.88%、回收率为7...     

某含铷花岗岩矿石中伴生钽铌锂的综合回收试验研究

伴生资源综合利用是绿色矿山建设、节约能源的重要举措。某地花岗岩型独立铷矿中伴生钽、铌、锂金属,为实现该铷矿的资源化利用,对钽、铌、锂进行了详细的综合回收试验研究。矿石中Ta₂O₅、Nb₂O₅、Li₂O品位分别为42.15g/t、184.00g/t和0.086%;钽铌赋存于铌铁矿中,锂主要赋存于铁锂云母中。确定采用磁选优先回收铌铁矿和铁锂云母—磁精矿重选回收钽铌—重选尾矿浮选回收锂的选矿工艺。试验结果表明:在磨矿细度为-0.074mm占61.81%的条件下,经弱磁选除铁—强磁选—两段摇床重选得到含11 650 g/t Ta₂O₅、50 400g/t Nb₂O₅的钽铌精矿,钽、铌回收率分别为38.46%和38.11%,钽、铌富集比均超过270;以碳酸钠、水玻璃作为调整剂,氧化石蜡皂和十二胺作为阴阳离子组合捕收剂,对重选尾矿进行浮选富集铁锂云母,经1次粗选、1次精选、1次扫选获得Li_2<...     

江西宜春低品位锂云母矿综合回收工艺研究

钽铌锂是重要的稀有金属,具有极高的开发利用价值。针对江西宜春地区低品位锂云母矿,开展了钽铌、锂及长石综合回收工艺试验研究。结果表明,针对低品位锂云母矿资源特性,开发了以-CO-NH-为主要作用官能团的高选择性锂云母捕收剂ZL-01,实现了在易于泥化的复杂矿浆体系中锂云母矿物的高效捕收,解决了传统脱泥-浮选工艺造成锂云母矿物流失的难题。以ZL-01作捕收剂不脱泥直接浮选锂云母矿物,浮选尾矿采用螺旋溜槽粗选-摇床精选的重选工艺回收钽铌矿物,重选尾矿采用弱磁-强磁联合的磁选工艺对长石矿物进行除杂提纯。在原矿含0.42%Li_2O、0.004%Ta_2O_5、0.008%Nb_2O_5的情况下,获得了Li_2O品位3.38%、回收率为73.50%的锂云母精矿,Ta_2O_5品位18.530%、Nb_2O_5品位24.120%,钽回收率48.89%、铌回收率36.98%的钽铌精矿,TFe含量(质量分数)0.090%、白度72.40%的长石精矿,实现了低品位钠长石化花岗岩蚀变锂云母资源的高效综合回收。     

某伴生钽铌锂辉石矿选矿试验研究

西澳某伴生钽铌锂辉石矿为伟晶岩型锂矿,矿石Li₂O品位1.53%、Ta₂O₅品位0.025%、Nb₂O₅品位0.006%;脉石矿物主要为长石、辉石和石英。为高效开发利用该矿石资源,进行了系统的浮选试验研究以及磁选、重选试验研究。确定采用弱磁选除铁—强磁选、重选联合回收钽铌—强磁选尾矿浮选回收锂辉石的选矿工艺。试验结果表明:原矿在磨矿细度-0.076 mm占75%条件下,弱磁选除铁—强磁选回收钽铌工艺分选指标优于螺旋溜槽重选工艺分选指标,强磁选精矿经摇床1次粗选、1次精选获得Ta₂O₅品位21.35%、对原矿回收率23.03%的钽铌精矿;以碳酸钠、氢氧化钠、氯化钙为浮选锂辉石调整剂,以改性脂肪酸类捕收剂T-88为浮选锂辉石捕收剂,对强磁选尾矿进行锂辉石浮选试验,经1次粗选、2次精选、1次扫选、1次中矿再选锂,获得Li₂O品位5.60%、对原矿回收率76.13%的锂辉石精矿,实现了矿石中锂辉石与钽铌矿物的有效回收。试...     

湖南仁里钽铌铍稀有金属矿床综合利用评价

湖南仁里矿床平均Ta₂O₅品位0.036%,Nb₂O₅品位0.047%,为中国东部高品位、超大型稀有金属矿床,主要有用矿物有钽铌矿物、绿柱石、云母和长石;伴生矿物有锂云母、电气石和石榴石等。钽铌矿物主要以块状、颗粒状、针状及少量的片状赋存于中-粗粒白云母伟晶岩中的钠长石和石英中,少部分赋存于白云母、绿柱石、磷灰石和电气石中,嵌布粒度较粗;绿柱石主要以块状及颗粒状赋存于伟晶岩中。本文采用螺旋溜槽粗选-摇床精选回收钽铌矿物-重选尾矿浮选回收云母-云母浮选尾矿浮选铍的工艺流程,获得了钽精矿(Ta₂O₅品位20.36%,Nb₂O₅品位19.87%,Ta₂O₅回收率73.53%)、铍精矿(BeO品位8.69%,回收率65.92%)和云母精矿(Al₂O₃品位24.26%,Li₂O品位0.25%,Rb₂O品位0.25%,Rb₂O回收率67.10%)。研究结果表明,仁里矿床稀有金属及非金属矿产资源丰富,矿石质量高,易选,回收率较高。该矿床具有较高的稀有金属综合回收率(69.73%)和矿产资源综合利用率(89.60%),具有较高的开发利用经济价值。      

江西宜春花岗伟晶岩型锂辉石矿中锂、钽和长石的综合回收

为实现江西宜春花岗伟晶岩型锂辉石矿中锂、钽及长石的综合回收, 开展了选矿综合回收试验研究。研究结果表明, 该锂辉石矿石英、长石含量高, 采用高选择性药剂ZH与氧化石蜡皂组合作为锂辉石捕收剂, 可降低细泥在锂辉石表面的罩盖影响, 优化矿浆流体环境; 在原矿含Li₂O为1.51%、Ta₂O₅为0.022%的条件下, 以氧化石蜡皂+ZH组合捕收剂浮选回收锂辉石, 采用细泥摇床重选工艺回收浮选尾矿中的钽矿物, 重选尾矿采用"弱磁选—强磁选"工艺除铁后作为长石精矿, 获得了含Li₂O 5.62%、回收率为74.65%的锂辉石精矿和Ta₂O₅品位为18.78%、回收率为40.21%的钽精矿, 以及产率为49.16%、含Na₂O 2.45%、K₂O 4.60%、TFe 0.15%、白度为62.9%的长石精矿。该工艺流程选矿试验指标良好, 实现了硬岩型锂辉石矿中锂、钽和长石的综合回收。      

磁选尾矿综合回收钽铌锂及长石选矿工艺研究

江西宜春地区钽铌锂选矿厂磁选作业排放的尾矿含Li_2O 1.51%、Ta_2O_5 0.031%、Nb_2O_5 0.027%及长石矿物等,具有较好的再回收利用价值。为综合回收尾矿中的有价资源,对其进行了矿石性质和选矿工艺研究。结果表明,采用"‘摇床+铺布溜槽’重选回收钽铌-浮选回收云母-磁选除杂回收长石"的"重-浮-磁"联合工艺,可获得含Ta_2O_5 21.14%、回收率40.92%的钽铌精矿,含Li_2O 4.32%、回收率71.41%的锂云母精矿,含TFe 0.09%、白度75.40%、产率为32.56%的长石精矿。试验指标良好,钽、铌、锂及长石等矿物均得到了较好的综合回收,具有良好的经济和环保效益,为现场工艺优化及同类资源的综合回收提供了有力技术支撑。     

栗木金竹源矿床矿石工艺矿物学与资源综合利用

通过对矿石工艺矿物学的研究,结合现有的选矿技术,在矿山原有的钽铌锡钨矿物重选回收的基础上,增加了从重选尾矿中回收云母→长石→石英的工艺。连选试验表明,钽铌锡钨重选尾矿再梯级回收的铷云母精矿、长石精矿与石英精矿质量达到工业利用标准,三种非金属精矿的回收率分别达到了3.13%、44.49%、35.56%,矿石的非金属矿物的资源综合回收率达到83.18%。     

内蒙古某低品位铷多金属矿选矿试验研究

内蒙古某铷多金属矿主要有价元素是铷和钽铌,Rb₂O品位为0.11%、(Ta, Nb)O₅含量为222.9 g/t,铷主要以类质同像形式存在于云母和钾长石中,少量赋存于钠长石中,钽铌矿物主要是烧绿石。为回收铷和钽铌资源,在原矿工艺矿物学研究的基础上开展了选矿试验研究,采用“强磁选+重选回收钽铌-中性浮选含铷云母-无氟有酸浮选含铷长石”的工艺流程,硫酸调节矿浆pH值,CK-Y1+DDA组合捕收浮选云母,SDS+DDA组合捕收浮选长石,全流程闭路试验获得产率为0.17%、(Ta, Nb)O₅品位为4.33%、(Ta, Nb)O₅回收率为33.22%的钽铌精矿和产率为70.26%、Rb₂O品位为0.134%、Rb₂O回收率为87.49%的综合铷精矿产品,尾矿中Rb₂O品位为0.045%,实现了矿石中铷资源的充分回收和伴生钽铌资源的有效回收。     

江西宜丰低品位锂云母矿中锂云母和长石的综合回收研究

江西宜丰地区锂云母矿风化严重、矿物赋存形式复杂, 锂云母中Li₂O理论品位较低, 为实现该锂云母矿中锂云母和长石的高效回收, 开展了详细的选矿试验研究。研究结果表明, 采用脱泥—浮选—磁选工艺, 首先对原矿进行脱泥, 降低了微细粒脉石矿物在锂云母矿物表面的罩盖, 然后以高选择性捕收剂ZY浮选锂云母, 实现了锂云母与脉石矿物的有效分离, 最终获得含Li₂O 1.73%、回收率75.87%的锂云母精矿; 浮选尾矿经磁场强度为1.5 T的高梯度磁选除铁后, 可获得作业产率为94.31%、含Na₂O 5.78%、K₂O 3.08%、Fe₂O₃ 0.07%、白度为67.21%的长石精矿, 可作为陶瓷原料使用。该工艺处理锂云母矿获得了良好的选矿指标, 实现了锂云母及长石的综合回收。      

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