萤石矿浮选的正交试验研究

采用正交试验法对硅质萤石矿进行了浮选试验研究。研究了碳酸钠、水玻璃、捕收剂用量对萤石粗精矿品位、回收率、浮选粗选作业选矿效率的影响,从而确定萤石浮选的最佳工艺参数及影响萤石粗精矿品位、回收率、浮选粗选作业选矿效率的主要因素。结果表明,当碳酸钠用量为1500 g/t、水玻璃用量为500 g/t、捕收剂用量为480 g/t时,浮选后的萤石粗精矿品位为80.68%,回收率为92.11%。     

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。     

洛阳燕子坡萤石矿油酸浮选试验研究

为了优化洛阳燕子坡萤石矿的选矿工艺并提高选矿指标,进行了浮选试验研究。试验表明,品位为49.22%的萤石原矿在磨矿细度-0.074 mm占61%的条件下,采用碳酸钠为pH调整剂、水玻璃为抑制剂、油酸为捕收剂,经过"一次粗选、二次扫选、六次精选"的浮选试验,可以得到品位95.09%、回收率94.99%的萤石精矿。试验得出如下结论:1)随着碳酸钠用量的增加,萤石浮选所用油酸的量会减少;2)分段添加油酸为宜;3)分段刮泡有益。     

云南某萤石矿抑制剂效果对比研究

以云南某高硅碳酸盐型萤石矿为对象,通过纯矿物和实际矿石浮选试验,对比研究新型碳酸盐抑制剂CY-101和酸性水玻璃对萤石浮选提纯的影响。纯矿物浮选试验结果表明,酸性水玻璃和CY-101均具有抑制方解石的作用,CY-101在中性条件下能够有效实现萤石与方解石的浮选分离。实际矿石浮选试验表明,以油酸钠作为捕收剂,粗选使用水玻璃抑制石英等硅酸盐矿物,精选使用CY-101抑制方解石,采用"1次粗选,5次精选,中矿分段返回"的闭路浮选试验流程,获得CaF_2品位为97.33%,回收率为86.38%的萤石精矿。与酸性水玻璃相比,新型碳酸盐抑制剂CY-101具有流程短、用量低的优势,有良好的工业应用前景。     

贵州某中低品位萤石矿浮选试验研究

贵州某石英型萤石矿中萤石品位为20.03%,二氧化硅品位高达53.77%,黄铁矿含量为2.75%。为了有效地开发利用该类型的矿石资源,有效提高选矿指标,对其进行了工艺矿物学及选矿试验研究。结果表明：矿石合适的磨矿细度-200目含量为76%,丁基黄药用量为300 g/t,水玻璃用量为4 000 g/t,油酸用量为400 g/t;采用1次粗选作业浮选硫化矿,浮选的硫化矿尾矿进行1次粗选作业、6次精选作业、1次扫选作业的闭路流程进行萤石浮选,最终获得精矿品位为93.56%、回收率为88.88%的萤石精矿,为该战略资源的开发提供了参考依据。     

柿竹园野鸡尾铜锡矿体萤石泥砂分选选矿试验研究

湖南郴州柿竹园野鸡尾铜锡矿体含有铜、锡、锌、钨、萤石等多种有价元素,为了综合回收其中的有价元素,整体选矿工艺流程长而复杂。萤石浮选处于整个选矿流程的最后端,之前添加浮选药剂对萤石浮选的影响很大。本论文采用旋流器分离泥砂,对细泥和沉砂分别浮选,降低其他浮选药剂对萤石主体部分浮选的影响。泥砂混选闭路试验萤石精矿品位94.14%,回收率为73.54%；旋流器沉沙闭路试验试验萤石精矿品位95.72%,回收率为80.33%,旋流器溢流开路试验萤石精矿品位为88.33%,回收率为3.86%,泥砂分选总回收率为84.19%,回收率远高于全泥浮选。     

新疆某萤石矿选矿试验研究

新疆某萤石矿嵌布粒度范围大,主要脉石矿物为方解石,与萤石相互包裹严重,分离难度较大。针对该矿石的性质进行选矿试验研究。试验表明,硫酸铝与水玻璃作为调整剂对于提高精矿回收率与品位有益;栲胶作为抑制剂能有效抑制矿石中的方解石;两段磨矿可明显提高精矿质量。最终采用两段磨矿(粗精矿再磨)、一次粗选、两次扫选、九次精选的浮选流程,选用硫酸铝、水玻璃作为调整剂,栲胶作为抑制剂,油酸作为捕收剂,获得了萤石精矿CaF_2品位97.23%、回收率67.27%的指标。萤石精矿中CaCO_3品位降至1.65%。     

罗河高硫铁矿高效回收选矿试验研究

罗河铁矿为了验证高硫矿对现有选矿流程的适应性,对高硫矿进行了试验研究。试验结果表明：浮选采用1粗2精3扫,磁选同现有生产流程,可获得产率12.60%、Es品位41.21%、Es回收率88.27%的硫精矿及产率31.13%、TFe品位68.30%、铁回收率98.18%的铁精矿;套用现生产浮选流程验证试验可获得产率11.95%、Es品位41.68%、Es回收率84.56%的硫精矿及产率31.58%、TFe品位68.28%、铁回收率98.32%的铁精矿;采用1粗2精3扫工艺有效硫回收率较高,说明增加扫选次数可提高有效硫回收率;采用2种流程均可获得合格的硫精矿及铁精矿产品,高硫矿对现生产选矿流程适应性较好。     

云南某低品位铅锌萤石矿选矿试验研究

云南某低品位铅锌萤石矿是以方铅矿、闪锌矿和萤石矿为主的多金属硫化矿。根据该矿石的特性, 进行了选矿工艺流程和浮选药剂制度试验。原矿铅品位2.56%、锌品位1.08%、萤石含量42.70%, 通过优先浮选流程选别后, 得到了铅精矿铅品位71.13%、回收率88.45%, 锌精矿锌品位50.10%、回收率83.80%, 萤石精矿萤石品位97.12%、回收率93.37%。     

河南某白钨矿伴生高钙萤石综合回收新工艺研究

对河南某白钨矿伴生高钙萤石进行了综合回收试验研究。以其白钨粗精矿为研究对象,通过反浮选预先脱除碳酸钙、再综合回收萤石的新工艺流程,使得伴生萤石资源得以高效回收利用。使用水玻璃作为预精选萤石抑制剂、氧化石蜡皂作为粗选捕收剂、酸化水玻璃和ATM作为精选抑制剂,经过一预一粗七精浮选流程,得到CaF₂品位93.95%、回收率24.15%的萤石精矿。依据实验结果进行了50 t/d的半工业试验,得到萤石精矿平均品位90.52%、平均回收率21.82%。     

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     

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     

2014 second batch of rare earth quota released

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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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.