煤矿胶带输送机分布式监控系统的通信网络

介绍了一种基于全矿井胶带输送机分布式监控系统的网络结构,该系统设置了2个就地控制站、1个集中控制站和1个远程监控主站,建立了RS-485、PROFIBUS和以太网3个层次的通讯网络,实现了对胶带输送机的就地、集中、远程监控,提高了生产效率,减少了现场操作人员,提高了安全性,取得了良好效果。     

2300XP电铲电气系统数字化改造

针对2300XP电铲特点,设计了一套基于PLC的数字化电气系统,详细介绍了改造方案,并给出了控制方式。对进口模拟系统进行了数字化升级改造获得成功,全数字式电气系统改善了控制精度,提高了可靠性,减低了维修成本,完全满足生产要求。新系统在德兴铜矿实践运行中取得了优良的效果。     

井下临时抽放瓦斯系统的技术改造

介绍了抽放瓦斯系统现状及存在问题,并分析了问题的成因;通过技术改造使系统得到了优化,满足了抽放瓦斯区域对抽放量的要求,提高了矿井防灾抗灾能力。     

井下探险救援机器人的设计

概述了研制井下探险救援机器人的必要性,详细论述了井下探险救援机器人设计的理论依据,探讨了其结构形式,设计了四轮驱动装置,以设计实例分析了其控制系统的组成,并介绍了所研制的井下探险救援机器人。     

神华推广应用"加长工作面高强度开采技术"效益显著

"加长工作面高强度开采技术"项目成功实现了工作面长度由240米增加到300米至400米,由此减少了割煤循环次数、提高了工作面的生产效率,减少了留设煤柱、提高了回采资源回收率,降低了巷道掘进量、减少     

花开了

花开了,它把自己自然分成两瓣,一瓣开满了善良,一瓣开满了丑恶。 花开了,它把自己自然分成两瓣一瓣开满了懒惰,一瓣开满了勤劳。 花开了,它把自己自然分成两瓣,一瓣开满了牛郎织女般的分离,一瓣开满了中秋满月般的团聚。 花开了,它把自己自然分成两瓣,一瓣开满了豺狼的贪婪,一瓣开满了春蚕的;}士烈。     

瓦斯检测传感器概述

阐述了两种国内外井下常用瓦斯检测传感器的工作原理,比较了它们的优缺点,分析了瓦斯检测中遇到的问题,探讨了现有瓦斯传感器存在问题的解决方案并对新式瓦斯检测仪器的发展方向提出了见解.     

丰山铜矿尾矿再选工艺流程优化

丰山铜矿为充分利用尾矿资源,对原选矿工艺流程进行了尾矿再选实验研究,延长了尾矿扫选流程,并改造了以往浮选设备,简化了操作流程,提高了选矿回收率,取得了较好的经济效益。     

准噶尔盆地中部1区钻井优化设计研究

围绕钻井工程设计优化展开研究,论述了准噶尔盆地中部1区井身结构优化过程,提出了井身结构优化方案;建立了该区岩石可钻性剖面,结合钻头使用效果评价,推荐了钻头选型方案;介绍了该区钻井液体系优选及使用情况。形成了准噶尔盆地中部1区钻井设计优化方案,提出了后续研究方向。     

降低粗精煤泥灰分选煤工艺改进

通过对辛置煤矿重介选煤厂粗精煤泥灰分偏高原因的分析，找出了问题所在，实施了技术改造。降低了粗精煤泥的灰分，保证了精煤产品质量，提高了精煤产率，争创了经济效益。     

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