广州LNG某段非开挖管线的探测

广州LNG管线采用了大量的环保安全的定向钻穿越等方式，简单介绍了广州番禺某段定向钻LNG管线穿越概况，讨论了简单条件和干扰条件下，对LNG定向钻管线的探测方法。     

水平定向钻进长距离穿越问题浅析

国内大型河流较多，用传统的方法实现管线过河工程造价高、施工工期长，并且管线埋深很难达到设计要求。近几年，随着国内水平定向技术 的不断发展，使用定向钻进行长距离、大口径管线穿越安装已成为可能。本文从不同技术角度谈谈长距离、大口径穿越工程中应注意的问题。     

仪长线九江长江穿越管线的发送技术

对仪长线九江长江穿越管线的发送技术进行了介绍，重点阐述了发送架的制作和发送架安装两个重点环节，使管线回拖时管线顺利通过发送架，回拖一次成功，创下了两项水平定向钻穿越的世界记录。     

水平定向钻进铺设管线的测量技术

对于安全优质水平定向钻进铺设管线来说，测量技术至关重要。介绍了施工前对已有地下管线和土层的探测、钻进时对钻头的跟踪和导航、以及铺设管线前后的测量问题，还介绍了测量仪器的工作原理、基本性能和适用范围。     

西部管道工程水平定向钻穿越施工

西部原油成品油管道工程主要包括鄯善一兰州原油管道和乌鲁木齐一兰州成品油管道工程。管线起于新疆乌鲁木齐市和鄯善县，止于甘肃省兰州市，乌鲁木齐至部善线路长度约300km，鄯善至兰州线路长度约为1550km。其中共有3大定向钻工程，黄河定向钻穿越、仁寿山定向钻穿越和301泵房定向钻穿越，工程量分别为：     

定向钻穿越回拖大口径管线的发送技术

本文介绍了定向钻穿越回拖管线在一般地形和特殊地形下发送管道的几种发送管道施工方法及成功案例,为同类型的定向钻回拖管线施工提供了技术参考。     

采用完善措施确保燃气管顺利穿越沣河成功

水平定向钻顶管穿越法在燃气管道施工作业中逐渐增加，其穿越河流，高速主干道，道路等地段有无法比拟的优越性。本文翔实记录燃气管线穿越沣河案例，汲取施工作业中经验和教训。     

CASE小型水平定向钻在西部地区岩层中的施工

随着国家加快西部地区战略发展的步伐,伴随着西部地区城市建设,采用非开挖技术建设新的地下管线已成为市场的必然。由于西部的岩石地层比东部多,市区、野外随时可遇,地形复杂,施工场地狭小,具有钻岩能力的中大型定向钻常会发现英雄无用武之地。如何在西部地区采用小型定向钻敷设地下管线,是工程承包商面临的新挑战!水平定向钻既要满足西部地区独特的地质状况,又要节约成本,实用的钻机和经济的钻岩配置才是用户的实际需要。     

北绕城汉城服务区定向钻施工实例

水平定向钻顶管穿越法在燃气管道施工作业中逐渐增加，其穿越河流，高速主干道，道路等地段有无法比拟的优越性。本文记录了燃气管线穿趣北绕城汉城服务区案例，汲取施工作业中经验和教训。     

非开挖铺设管线施工方法及其设备技术发展趋势

本文分析了国内外水平定向钻和气动冲击锤两种非开挖施工设备的施工方法，对其工作原理、适用的施工范围、各自的优缺点、以及典型施工方法进行了分析，并论述了非开挖设备技术的三个主要发展方向：由于铺设大管径管线施工要求，非开挖设备向大型化发展；水平定向钻机与气动冲击锤组合施工发展，解决复杂地层管线铺设难题；专用设备与知能设备的开发，实现非开挖设备产品的更新换代。     

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