一种回淤层取土器的研制

适航水深资源开发关键技术是如何利用现行水深以下淤泥质回淤层进行通航,以达到增加航深和降低航道维护费用之目的。国内外针对淤泥质港区或呈淤泥特性航道适航回淤层取样技术主要集中在非接触与接触二大类。目前,以荷兰Silas系统为代表的非接触类取样技术已趋于成熟,并在国内外广泛应用;而用于现场回淤层接触类取样技术至今尚未取得显著突破。工程实践中,需对非接触类技术获取的取样数据进行验证。研发一种具有稳定、高效的原状淤泥性土取土器,丰富并完善这一领域接触类取样手段,具有现实意义。     

黄骅港外航道整治工程及航道骤淤防治技术

航道骤淤防治是淤泥粉沙质海岸港口建设的世界性难题,尚没有成熟的理论和技术。黄骅港外航道整治工程实现了航道骤淤防治技术的重大突破,取得了多项国内外领先的科技创新和管理创新。其首次提出的淤泥粉沙质海岸的分类、骤淤重现期等理论均填补了国家港口规范的空白,在设计方案中首创了消能缓冲区布置模式、日字型块体和倒L型胸墙等新结构形式。在工程管理中创新地实施风险决策和"五位一体"协同管理模式。该项技术实施取得了显著减淤效果,保证了港口航道通航水深要求。     

冰冻取样器的结构设计

阐述冰冻取样是获取湖泊、水库等水域非扰动淤泥质沉积物的有效技术方法,介绍了冰冻取样器的工作原理,主要结构的设计,以及冰冻取样的试验效果.     

重力取样器取样技术研究

在湖泊环境研究中，淤泥质沉积物取样是一项很重要的工作，样品的取心率和原状性直接影响了环境研究的结果。重力取样器是获取湖泊、水库等水域浅层湖泊沉积物的一种经济有效、操作简单的常用工具。因此研究重力取样器的取样技术对环境研究具有积极的意义。研究了重力取样器的取样技术，并在此基础上成功设计了一种便携式的重力式取样器，非常适合环境研究机构的沉积物取样工作。     

冰冻取样技术的试验研究与应用

冰冻取样技术是获取淤泥质沉积物和界面水的最佳方法，是近代环境科学研究的重要取样方法，突出特点就是可以获双非扰动的碾状样品。主要介绍该技术的试验研究和实际使用的效果。     

三重管高压旋喷注浆技术在上海地铁旁通道软土地层加固中的应用

上海地铁１号线区间隧道多过淤泥质软弱含水地层。要在此加固软土层并封水。煤科总院北京建井研究所与上海机施公司合作，在长沙路地铁旁通道采用三重管高压旋喷注浆法进行处理，取得了成功，文中介绍了该种施工技术与施工经验，供设计、施工单位参考。     

西北地区残积淤泥类土的工程地质特性

残积淤泥类土分布于我国西北地区，它具有成层性差，结构、构造不均一，厚度变化大，抗剪强度低，中压缩性，非湿陷性，高灵敏性，承载力低，在饱水状态下，还具有触变、流变性等特点。该文以临厦－临洮、定西－榆中盆地等为代表该类土的资料为基础，深入研究该类土的工程特性。     

台吉付井井塔钻孔灌注桩基础设计

北票台吉竖井工业广场表土为古河床冲积层及第三纪红粘土层,总厚度约34米.下部是强风化粗砂岩层,厚度为16～21米.冲积层由砂质粘土、淤泥质砂质粘土、粘土、红粘土和粘土碎石组成.淤泥质砂质粘土层(俗称流泥层)在原地表5米以下,层厚的1.7米.地下水位,一般距地表2.5米左右.冲击层渗透性差,属非均质含水土层.     

斜井过淤泥滑动层施工

斜井过淤泥滑动层施工盘江矿务局建井大队杨墨林（贵州盘县）火铺矿井改扩建主皮带斜井位于矿坑木场内，该地段原是山傍河流沼泽地，经过回填找平做为坑木场。表土段上部为黄土矸石等不均匀回填物，下部是淤泥层。在淤泥层底部与煤系地层接触为一斜面，富含水，涌水量３６...     

粉喷桩在沉井施工中的应用

以沉井施工实例说明了水泥粉喷桩在淤泥质沉井地基处理中的应用方法，并对其实施效果进行了评述。     

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