湖南临澧白土坡膨润土钠化工艺研究

膨润土中蒙脱石颗粒呈鳞片状,大小不一、厚薄不均,颗粒边缘轮廓较清楚。膨润土的ＰＨ值为６．６～８．０８;碱性系数（ＥＮａ＋＋ＥＫ＋）／（ＥＣａ＾２＋＋ＥＭｇ＾２＋）＝０．３０～０．４２;ＥＣａ２＋／ΣＥ＝０．６５７～０．５８;ＥＶａ＋／ＥＣａ＾２＋＝０．０８８～０．１１;阳离子交换总量较低,为３７．２～４８．４ｍ．ｍｏｌ／１００ｇ。该膨润土为钙基膨润土。对白土坡膨润土钠化的最侍工艺条件是：用对辊挤压     

硫酸多分步淋洗技术回收铀的研究

以硫酸（０．８～１．０ ｍ ｏｌ／Ｌ）硫酸铵（１．０～１．５ ｍ ｏｌ／Ｌ）为淋洗剂，采用多分步淋洗技术，在普通的固定床淋洗柱（Φ８．０ ｍ ｍ ）中对不同铀容量的２０１×７ 树脂（４３～１１８ ｍ ｇ／ｇ）进行试验。结果表明，淋洗体积仅１．５～２．５ ＢＶ①，合格淋洗液铀质量浓度达１５～２９ ｇ／Ｌ，总淋洗体积为１６～２１ ＢＶ，淋洗时间小于３５ ｈ。该淋洗合格液可先用干的粉状碳酸钙中和沉淀法去除硫酸，然后滤液用氨水沉淀铀，即两步沉淀法。所获ＡＤＵ 产品为一级品     

381矿床地浸中细菌代替双氧水试验研究

本文论述了云南３８１地浸矿山用细菌代替双氧水作氧化剂工艺技术。试验证明：研制的生物反应器结构合理，生物反应器中的固定化细菌在外界不补加营养物质的条件下，通气量４．６ｍ＾３／ｈ．ｍ＾３，反应器有效容积６．９ｍ＾３，每小时能氧化地浸吸附尾液１１．５ｍ＾３时，氧化后溶液电位大于５１０ｍｖ，７个月共氧化吸附尾液３４２５８．０ｍ＾３，用细菌氧化后溶液与用Ｈ２Ｏ２氧化后溶液进行抽注对比试验，其效果基本相同，浸     

用于复杂矿物浮选分离的高效技术和工艺的研究

本文论述的是用浮选法处理含有大比重的浸染型矿物的复杂矿石的研究和应用的结果。研究矿样是从科拉半岛科夫多尔矿床采得的含有斜锆石的复杂矿石，斜锆石是一种有价值的稀有矿物，天然ＺｒＯ２密度５．８－６．０ｇ／ｃｍ＾３，品位０．１５－０．１７％，浸染粒度小于０．２ｍｍ．     

细菌快速氧化Fe^2＋工艺研究

本文论述了生物反应器结构和细菌快速氧化亚铁工艺，通过试验证明：研制的生物反应器结构合理，能有效地富集细菌，用该生物反应器富集的细菌能快速氧化地浸吸附尾液中Ｆｅ＾２＋在云南地浸矿山用研制的生物反应器（总有效容积约为１．４ｍ＾３），在外界不补加营养物质条件下，通气量为１５０Ｌ／ｍｉｎ时，氧化尾液流速为２．５ｍ＾３／ｈ，氧化后溶液电位达到５５０ｍｖ以上，高于原每升吸附尾液０．４ｇＨ２Ｏ２与溶液电位（约５     

核级UO_2及U_3O_8中铌的萃淋树脂分离－催化极谱法测定

样品溶液经ＣＬ－５２０９萃淋树脂在２ｍｏｌ／Ｌ硝酸介质中分离铀后，用催化极谱法测定铌。铌在０．８％Ｈ２ＳＯ４－０．０５ｍｏｌ／Ｌ酒石酸－２％ＫＳＣＮ－０．０８％抗坏血酸－０．０００４％聚乙烯醇底液中，于－１．３Ｖ处呈现络合催化氢波（ｖｓ．ＳＣＥ）可用二次导数测定。铌峰电流与浓度（０．００５～０．０３μｇ／ｍＬ）有线性关系。称样０．１ｇ时，铌的测定下限为０．５μｇ／ｇＵ、６次测定相对标准偏差＜１５％，加入回收率为９１％～１１９％。     

抗变形框架结构受力分析

本文应用数值方法对抗变形框架结构在自重、地表水平变形ε＝６．０ｍｍ／ｍ和地表曲率变形Ｋ＝０．２．１０·／ｍ、地表水平变形ε＝－３．５ｍｍ／ｍ和地表曲率变形Ｋ＝－０．２·１０－３／ｍ三种状态下进行计算，并对地基反力、位移情况、结构体系内力及砖墙内应力在三种状态下进行定量分析。     

CVD动态沉积法连续制备YBCO超导带

本文报道了用ＣＶＤ动态沉积法连续制备ＹＢＣＯ起导带的实验结果。以Ｙ（ＴＭＨＤ）３，Ｂａ（ＴＭＨＤ）２，Ｃｕ（ＴＭＨＤ）２为挥发源，高纯Ａｒ和Ｏ２分别为载流和反应气体，在移动的金属Ａｇ基带上，以１０－１５ｃｍ／ｈ的带速制出了有强烈Ｃ－轴取向的ＹＢＣＯ超导带。最好样品的Ｊｃ达到１．４×１０＾４Ａ／ｃｍ＾２（７８Ｋ，ＯＴ）。     

以赤铁矿粉为有效促进剂的黄铜矿精矿酸浸

在０．５ｍｏｌ／ｄｍ＾３ＨＣｌ溶液中浸出比表面积约为３ｍ＾２／ｇ的黄铜矿精矿是在３３３Ｋ温度下分别使用赤铁矿（Ｆｅ２Ｏ３）和氯化铁（ＦｅＣｌ３）粉进行的，用Ｆｅ２Ｏ３ｏｗ ｉｖｐｃｂｍ ｏｇｅ ｄｙｔ ｓｋ ｄ ２４ｉｈ ｊｆ ｍｗ ｒｊｂｃ ｘｑ ７５％的铜，而使用ＦｅＣｌ３粉可浸出约６５％的铜。使用Ｆｅ２Ｏ３粉浸出时，铜的产率是不用促进剂时的两倍或更多，当浸出后固体残渣表面形成大量元素硫时，     

萃淋树脂分离—催化极谱法测定核级UO2及U3O8中的钛

样品溶液经ＣＬ－５２０９＃淋树脂在２ｍｏｌ／Ｌ硝酸介质中分离铀后，用催化极谱法测钛。在含乙酸一乙酸铰缓冲液（ｐＨ５．５）的０．４％ＥＤＴＡ－０．００２％铜铁试剂一０．００５ｍｏｌ／Ｌ溴酸钠底液中，于一０．６５Ｖ（ｖｓ．ＳＣＥ）有一钛催化波，进行二次导数测定。钛峰高与浓度在０．００５－０．０５μｇ／ｍＬ有线性关系。称样０．１ｇ钛的测定下限为０．５μｇ／ｇ。相对标准偏差优于６％，加入回收率为９４％一１０６％。     

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。