气动凿岩机微机监控运行试验台

介绍了气动凿岩机微机监控运行试验台的基本原理及结构组成，利用该试验台可检测气动凿岩机的冲击频率，钎杆转速，耗气量等参数，以判别凿岩机质量，生产实践表明，使用该试验台检测准确率高，劳动强度低。     

电动凿岩机应用可控硅变频

为使电动凿岩机轻便化而研制的可控硅变频装置,已由地科院勘探所和天津电气传动研究所协作试制出样机,并进行了初步试验台试验。由于中频电动凿岩机(重25公斤)较普通工频电动凿岩机(重32公斤)轻7公斤,减轻了工人的劳动强度。但中频电动凿岩机要靠     

内燃凿岩机运行试验台的研究

介绍了内燃凿岩机运行试验台的原理、结构和组成。该试验台用于内燃凿岩机的出厂检测,操作简捷、检测结果准确。与现场凿岩试验的对比表明,运用该试验台,可以有效地判定内燃了凿岩机的质量。     

凿岩机测试技术新发展

由于各种凿岩机（风动、电动、内燃以及液压）品种和数量的增加，研究凿岩设备的工作理论愈显重要。随之，测试技术也不断完善，其中尤以综合测试（即一次多项目的测试）发展为快。目前较为完善的综合测试方法有ZHS型凿岩机性能数字显示仪测试、晶体管内燃凿岩机性能试验台测试     

凿岩机运行试验台

目前在行业中出厂试验考核凿岩机的扭矩，大多采用CNZ-5型扭矩试验台，由凿岩机转钎时匀速启动最大重锤负荷的能力来测定转钎扭矩．并由它作为产品是否合格的扭矩指标。这种方法只能近似反映产品的最大扭矩．与凿岩状态下的实际扭矩特性显然有明显的差别。一些研究表明．在大扭矩负载作用下．凿岩机转速急速降低，不能保持其正常的工作状态。本试验台可得到凿岩机工作状况下的冲击频率、耗气量、钎杆转速。检测快捷、可靠，提高了凿岩机的出厂检验水平。     

一种新型智能化多功能液压凿岩机试验台

液压凿岩机需要进行定期的维修保养。当检修完成后,如果不进行系统完整的检测,就无法判定检修后凿岩机是否可以正常使用。另外,矿山需要系统检测的液压设备也很多,不可能针对每种设备都采购一种液压试验台,需设计一种多功能的智能型试验台来满足矿山各类液压设备的检测。这种新型智能化多功能液压凿岩机试验台采用了零泄漏逻辑阀,按测试对象的需求将相关油口进行组合,通过PLC控制与工控机联系起来,实现对凿岩机及矿山其他液压设备各项性能的检测。设计创意新颖,可实现的功能多,且性能先进。     

凿岩机岩石钻进试验装置的设计

模拟凿岩机实际工况,研制一套凿岩机岩石钻进性能试验台,通过测试凿岩机凿孔速度来反映凿岩机凿孔性能。介绍了试验台各部分组成及结构、液压系统及测控系统的设计,重点是激光位移传感器在凿孔速度测试中的应用。     

电动凿岩机的改进与提高

<正> 电动凿岩机在国内的推广使用是80年代开始的,均为功率2～3kW的支腿式,主要使用在地方小煤矿,及集体或个人经营的采矿场。随着生产的发展,用户对电动凿岩机的使用性能提出了更高的要求,现有的产品已难以适应生产的需要,同时,小型风动凿岩机和手持式液压凿岩机的进一步发展,使电动凿岩机的销量也有所下降,因此,电动凿岩机急需要改进提高。     

在兄弟刊物上

我国地下装载机发展概述系统论述了我国地下装载机系列产品的研制情况,重点介绍了WJ、CY两个地下装载机系列产品的结构特点和技术创新,并与国外同类产品进行了综合比较。何正忠．工程机械,1999（6）大洋钴结壳资源研究开发现状简要概述了国内外有关大洋粘结壳资源勘查及冶炼加工的现状,同时指出我国应加大投资力度,研究采矿和冶炼加工方法,为下世纪开发利用大洋钴结壳资源奠定技术基础。沈裕军等矿冶工程,1999（2）气动凿岩机微机微机监控运行试验台介绍了气动凿岩机微机监控运行试验台的基本原理及结构组成,利用该试验台可检测气…     

电动—液压凿岩台车

Gardner—Denver公司凿岩机子公司于1977年中制造成功了MarkⅢ型电动—液压凿岩台车,适用于地下采矿和平巷掘进。台车安装两个JTI托臂,可回转270°。凿岩机是新设计的HPR—1型液压凿岩机,由一台75马力的电动马达带动两个排量和压力不同的泵,以产     

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。