液动推杆装置的应用

液动推杆装置的应用义安煤矿严裕新，王华玲１概述煤矿井口安全门装置从第一代、第二代电磁锁发展至今，它的闭锁装置在产品质量及技术可靠性等方面，一直没有得到合理的解决，人和物险些坠入井筒的事故时有发生。给煤矿安全生产带来严重危害。根据（煤矿安全规程）及中煤...     

酸试剂配制时间对测定尿素氮结果的影响

酸试剂配制时间对测定尿素氮结果的影响淄博矿务局南定煤矿医院周春花，孙继承，周春香淄博矿务局中心医院孙芳云关键词酸试剂配制时间，尿素氮测定结果，影响１材料与方法１．１标本来自我院住院病人空腹血浆。其中包括尿毒症、肾功能衰竭、非肾脏疾患的病人。１．２方法...     

专利产品XDG型电液推杆

由扬州市煤矿机械厂研制成功的专利产品XDG型系列电液推杆,是目前国内广泛使用的气缸、液压缸、电动推杆和直线电机理想的更新换代产品.该产品可广泛用于煤炭、冶金等部门.适用于需往复推、拉直线(或往复旋转一定角度)运动的机械,也可用于需上升、下降或夹紧工作物的场所.在煤炭系统的推车机、阻车器、摇台、安全门各类闸门中有广泛的应用前景.     

副井安全门机械闭锁装置

车集矿副井底两个罐笼安全门在正常开闭情况下没有设置闭锁装置,在安全上存在一定的隐患;把罐工在关闭安全门后,不经过任何辅助操作就可以再次打开安全门。为了解决此问题,根据现场情况,特设计一机械闭锁装置,安装上可以实现自动机械闭锁,消除了隐患。     

重型汽车液压控制闭锁离合器闭锁的实践

应用流体力学原理,从理论上分析了液压传感器的动力学和运动学特性,推导出闭锁控制阀开启压力的计算方法,并通过试验验证。闭锁离合器在液力─机械变速箱中的正常使用证实了液压控制闭锁离合器的设计是合理的。液力─机械变速箱采用闭锁离合器,有效地解决了液力变矩器在小负荷、高转速下传动效率低的问题。     

薄煤层综合机械化第二次研究试验座谈会简况

根据燃化部<73>燃采掘办字二十三号文和部领导的指示精神,于一九七三年十月十六日至十月二十日,由淄博矿务局主持,在山东省淄博矿务局西河煤矿召开了第二次薄煤层综合机械化座谈会.参加会议的有:燃化部综合机械化办公室、北京煤炭科学研究院、上海煤矿机械研究所、重庆煤炭科学研究所、山东省煤炭工业局、湖北煤矿机械制造厂、辽源煤矿机械制造厂、兖洲煤矿机械制造厂、山东矿业学院、淄博矿务局及西河煤矿共二十三名同志.     

煤矿防爆车辆液力变矩器闭锁时车辆速度计算

对煤矿液力传动车辆专用闭锁液力变矩器进行分析,推导出闭锁液力变矩器动力学模型、数学模型和闭锁条件,提出了一种用于煤矿防爆车辆液力变矩器闭锁时车辆速度的计算方法,以WC8E(B)煤矿井下防爆无轨胶轮车为例进行了分析计算,验证了文中提出的计算方法,并与实际测试结果对比分析。结果表明:该计算方法能够很好地对煤矿液力传动防爆车辆闭锁车辆速度进行计算。     

南屯煤矿依靠科技进步实现经济连续增长

淄博矿务局南定煤矿是１９８９年投产的新矿井，设计生产能力４５万ｔ／ａ。该矿位于淄博煤田北端的深部，井田内９、１０煤层为可采和局部可采，煤厚０．８～１．２ｍ，煤层集中在石炭系太原统地层内。区内大型断裂构造发育中等，平均１．０２条／ｋｍ２，小断层很发育，...     

FSWZ——11B型轴流抽出式局扇在瓦斯管理中的应用

ＦＳＷＺ——１１Ｂ型轴流抽出式局扇在瓦斯管理中的应用淄博矿务局南定煤矿尹经梅薄其山谭云寿曹元森蒲先功关键词瓦斯抽排下隅角瓦斯浓度抽出式局扇１前言在高瓦斯回采工作面生产过程中，回采工作面的上隅角（或下行通风的回采工作面下隅角）瓦斯积聚始终是威胁安全生产...     

介绍一种井口闭锁控制装置

介绍一种井口闭锁控制装置徐州义安煤矿严裕新长期以来，煤矿井口安全门、摇台、阻车器等的闭锁装置一直得不到合理解决，工人、物件坠进井筒的事故时有发生，给煤矿安全生产带来了严重危害。根据《煤矿安全规程》、中煤公司第７６号文与第４３８号文规定，我矿结合新副井...     

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。