平动安全门特点及应用

分析了滑动安全门缺点,介绍了平动安全门结构及特点。根据国内煤矿具体情况对平动液动链式安全门提出改进方法,并提出了把气动安全门改成平动安全门的方法     

平动安全门特点及应用

分析了滑动安全门特点,介绍了平动安全门结构及特点。根据国内煤矿具体情况对平动液动链式安全门提出改进方法,并提出了把气动安全门改成平动安全门的方法。     

新型气动和电动安全门的设计

介绍了气动滑移式旋转安全门及电动链式安全门的结构、原理、性能特点。该两种新型安全门改进了多年来我国使用的框架式安全门的结构，使罐笼和提升信号互为联锁，并适应了长材料入井装卸和更换罐笼的需要，使安全门的设计更加完善合理。     

微机控制自动安全门的推广应用

针对目前副井口各种类型的安全门及控制方式存在的问题,说明了应用微机智能控制自动安全门的必要性,论述了微机智能控制自动安全门的主要功能、简要构成及应用效果。对应用微机智能控制自动安全门在创建本质安全型企业中的作用进行了分析,并指出了微机智能控制自动安全门在矿井中的应用前景。     

煤矿竖井摆动式安全门的研制

根据目前各种矿用安全门的结构特点和现场实际的要求,设计制作了竖井摆动式安全门,介绍了安全门的基本结构、工作原理和技术参数,现场使用表明,该安全门结构合理,工作安全可靠,各项指标均符合《煤矿安全规程》的要求,效果良好。     

上摆折叠式矿井安全门开启状态防自落方法研究

分析研究了上摆折叠式矿井安全门的结构特点及工作原理,找出了该安全门在开启状态下产生自落的原因,提出了安全门开启状态下重力自锁和液压驱动回路自锁的新方法,彻底解决了该安全门开启状态下的自落问题,现场使用证明效果良好。     

矿用竖井摆动式安全门的研制

根据目前各种矿用安全门的结构特点和现场实际要求,设计制作了竖井摆动式安全门,介绍了安全门的基本结构、工作原理和技术参数,现场使用表明,安全门结构合理,工作安全可靠,各项指标均符合《煤矿安全规程》的要求,效果良好。     

煤矿副井全封闭推拉链式安全门的研制与应用

介绍了一种全封闭推拉链式安全门,该安全门将传动链隐藏在槽钢内,内置小跑车在滑道上滚动。笔者详细分析了该安全门的基本结构、工作原理与传动机构设计。现场应用表明,该安全门结构合理、传动平稳、噪声小且工作安全可靠。     

煤矿竖井摆动式安全门的研制

根据现场情况,研制了竖井摆动式安全门,介绍该安全门的基本结构、工作原理和技术参数,使用表明,该安全门结构合理,工作安全可靠。     

全封闭链式安全门研制

研制全封闭链式安全门,采用PLC逻辑控制,实现井口"三闭锁",保证安全门运行符合煤矿安全规程。安全门的研制降低了工人的劳动强度,推动了现代化矿井的建设。     

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。