主排水泵检修质量及注意事项

介绍了大兴煤矿主排水泵的概况,影响排水泵检修质量的因素及排水泵大修时的主要工作,分析了提高排水泵检修质量应重点注意的四项内容。可供排水泵检修人员参考。     

矿井主排水泵压入式补水的效率分析

基于煤矿主排水泵效率偏低导致能源浪费严重的现状,进行主排水泵压入式补水的改进研究,对压入式高水位补水和压入式子母泵补水进行效率分析。结果表明:使用压入式高水位补水,水泵运行效率改善并不明显。而子母泵正压补水实验中,采用变频器对子泵调速,母泵的流量及实际扬程会成比例的变动,且母泵会一直处于最佳工作状态。     

300型电动水泥泵的使用与改进

田陈煤矿主、副井筒深度分别为507米和468米,井筒穿过第四纪冲积层,风化带砂岩和3煤顶底板砂岩,裂隙发育,含水丰富,预计井筒涌水量850～920吨/小时。采用上部冻结、基岩预注浆的施工方法。注浆设备选用300型电动水泥泵,该泵系石油固井的专用设备,泵的压力高,能满足注浆工程的要求,但是泵的排出量太大,不适应地面预注浆工艺要求。因此枣庄矿务局地质队,     

模糊控制变频调速在碱沟煤矿的应用

通过介绍碱沟煤矿主扇风机的节流调节与变频调节方法,以及变频调速和模糊控制技术的基本原理和应用情况,分析论证了变频调速技术在风机、泵类负荷调节的节能效益,说明了模糊控制+变频调速技术的应用是企业老、旧高耗能设备实施节能降耗技术改造的最佳途径。     

煤矿主排水系统经济运行因素分析

煤矿主排水系统是煤矿生产耗电的主要设备.从排水系统组成上,分析了影响矿井排水经济性的因素,提出了通过提高水泵质量、调节水泵工况、降低管网阻力、清扫排水管路、进行无功补偿等措施,可以达到提高排水系统经济性的目的.     

煤矿主变压器故障诊断方法的分析

文章主要针对煤矿主变压器故障类型及相应的诊断方法进行分析,首先对其意义、故障类型进行阐述,其次对故障诊断给出了相应的几种方法,分别是直接观察法、电气试验分析法、油性色谱分析法,并对各自的故障诊断原理进行论述和举例说明,对加强煤矿主变压器的运行维护具有重要的实际作用。     

煤矿主扇风机与主排水泵耗能分析及节能途径

煤矿主扇风机与主排水泵耗能分析及节能途径铜川矿务局陈道平１引言煤炭行业是能源消耗大户，其中尤以通风机和水泵耗能最多。目前。我局主扇、主泵耗电量占原煤生产耗电量的比率，平均为２６．２％，最大为３０．１％，平均效率为５６％。因此，对主扇、主泵的耗能状况进...     

煤矿主通风机能力验证装置的研制与应用

针对安全生产检测检验行业尚无煤矿主通风机能力验证装置的现状,依据AQ-1011-2005 《煤矿在用主通风机系统安全检测检验规范》和GB/T 1236-2000 《工业通风机用标准化风道进行性能试验》技术标准,提供同时符合2项技术标准要求的现场检测条件,流量、风压、轴功率、转速等参数满足CNAS-GL003 《能力验证样品均匀性和稳定性评价指南》的稳定性要求,进而开展煤矿主通风机的能力验证工作。煤矿主通风机能力验证装置的研制与应用,对安全检测检验机构相关技术能力的能力验证提供了科学依据。     

煤矿主通风机节能运行探讨

煤矿主通风机是煤矿开采主要耗能设备,但我国煤矿主通风机运行效率普遍较低,在节能减排大形势下,提高煤矿主通风机运行效率是势在必行的。针对煤矿主通风机实际运行效率低的普遍状况,从理论和实际应用中分析了影响煤矿主通风机节能高效运行的主要原因,并提出相应解决方案。     

冷泉煤矿主副井井筒基岩段地面预注浆施工

介绍了冷泉煤矿主、副井井筒基岩段地面预注浆方案设计、注浆方式及段高和注浆效果,讨论了止浆位置、压水试验、浆液配比、注浆压力调整及注浆结束标准等质量控制要点。     

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