改性天然沸石处理富营养化公园湖水样的实验研究

以长春产天然沸石为原料，经改性处理制成污水吸附剂，用于公园湖污水水样的动态吸附处理，对氨氮的一次去除率达82％以上，对磷的一次去除率达79％以上，COD下降78％以上。本法成本低，不产生二次污染。     

EF法处理选磷废水的研究

应用自行设计的电浮选装置，采用铁成铝作可溶性阳极，处理选磷废水，其ＣＯＤ去除率达８１％～８３％，ＳＳ去除率均在９１％以上，结果表明，这是一种有工业推广价值的方法。     

用黄铁矿烧渣处理选磷废水

以硫铁矿烧渣为原料，经适当处理制取浇渣净水剂。对磷废水有较好的净化效果，其ＣＯＤ、ＳＳ去除率分别为７７．１％和９９．７５％。     

劳废锏离弊犹寰换难芯? ,

通过对新研制的小型双级复合式氡子体净化装置的工业性试验，探讨了独头巷道作业面以净化装置为界面的第一净化区、第二净化区的氡子体浓度的变化规律，试验结果表明，在作业区域内，依据所需风量，安设相应的净化装置，利用循环风流对空气进行净化，可使氡子体与粉尘的净化效率分别达９５％和９９％以上，它既能满足辐射防护的卫生要求，又能节省能耗。     

天然沸石的改性及其对造纸废水的脱色研究

研究了用盐酸和高温方法活化天然沸石的工艺条件，在混凝、酸析除杂的基础上，再用活化沸石处理造纸黑液，色度深度去除率可再增加69％以上，CODcr去除率增加22.5%。     

独头巷道氡子体净化的研究

通过对新研制的小型双级复合式氡子体净化装置的工业性试验，探讨了独头巷道作业面以净化装置为界面的第一净化区，第二净化区的氡子体浓度的变化规律。试验结果表明，在作业区域内，依据所需风量。安设相应的净化装置，利用循环风流对空气进行净化，可使氡子体与粉尘的净化效率分别达９５％和９９％以上，它既能满足辐射防护的卫生要求，又节能省能。     

云锡公司烟化炉烟气SO2治理实践

在对锡冶炼烟化炉烟气性质分析的基础上，探讨目前用于烟化炉SO2治理设备的运行情况及存在缺陷，介绍动力波洗涤器在云锡公司3^#烟化炉SO2烟气治理中的运用情况。采用动力波洗涤技术，以石灰石乳为洗涤剂，二氧化硫去除率68．9％～87．2％，设备阻力1．3-2．0kPa，二氧化硫烟气净化效果较好。     

粘土矿物材料净化水体中氮磷的研究

氮磷含量超标容易导致水体富营养化。采用粘土矿物可以净化水体中的氮磷。本研究以海泡石、绿沸石、饭麦石、火山石4种粘土矿物材料为研究对象,开展其吸附净化模拟富营养化水溶液中氮磷的研究。研究结果表明,海泡石和绿沸石对水溶液中NH_4~+,以及海泡石和火山石对水溶液中总磷的去除效果明显。用2%的海泡石处理5 min后,水溶液中NH4+的去除率达到90%以上,水溶液中总磷的去除率达到50%左右,可有效缓解或净化水体中氮磷,防治水体富营养化。     

含铁废水的吸附处理研究

研究了用盐酸改性的粉煤灰对铁的吸附性能，并与活性炭进行了比较。试验结果表明，用3mol／L的盐酸改性粉煤灰对铁有很好的吸附性能，吸附量可达88mg／g以上，对铁的去除率达99．2％，高于活性炭对铁的去除率。     

甘肃某铅锌矿选厂废水净化与回用试验

为了解决甘肃某铅锌矿选矿废水的循环利用问题,探索了自然净化处理的效果,比较了不同絮凝剂的沉淀效果,在研究确定了聚丙烯酰胺（PAM）最佳净化参数的基础上,进一步研究了活性炭再处理的工艺参数,最后比较了净化前后废水和自来水分别处理矿石时的产品指标。结果表明：①选矿废水经PAM絮凝+活性炭吸附工艺处理,水质明显改善。其中固体悬浮物减少81.43%;CODCr降幅高达74.56%;金属离子中Cu2+去除率达90.16%,Pb2+、Zn2+、Fe3+去除率高达93%以上。②采用净化后的废水处理矿石,其铅精矿、锌精矿指标明显优于用未经处理的废水生产的指标,与用自来水生产的指标差异很小。因此,用PAM絮凝+活性炭净化后的废水回用生产完全可行。     

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。