MG300／680—WD型交流电牵引采煤机研制

ＭＧ３００／６８０—ＷＤ型交流电牵引采煤机研制煤炭科研总院上海分院陈佑贤液压牵引采煤机因其性能参数、传动效率、可靠性及生产能力等方面难干满足高产高效工作面要求。而电牵引采煤机在同样条件下与液压牵引采煤机相比．生产能力可提高６０％，由牵引部故障而引起的...     

采煤机交流变频调速系统

采煤机交流变频调速系统刘振坚上海分院与波兰合作，于１９９０年成功地研制出国内第一台变频调速电牵引薄煤层爬底板采煤机。之后又开发了ＭＧ３００／６８０－ＷＤ、ＭＧ２００／５００－ＷＤ、ＭＧ３７５／８３０－ＷＤ型中厚煤层型大功率电牵引采煤机。本文就这三种采...     

国产最大功率高产高效交流电牵引采煤机在鸡西煤机厂研制成功

国产最大功率高产高效交流电牵引采煤机在鸡西煤机厂研制成功由煤炭科研总院上海分院与鸡西煤机厂联合研制的国产装机功率最大，具有国际先进水平的高产高效交流电牵引ＭＧ３００／６８０－ＷＤ型采煤机，历经一年时间，放１９９４年１２月２０日在鸡西煤机厂研制成功，并...     

MG250／600—AWD交流电牵引采煤机的试验

ＭＧ２５０／６００—ＡＷＤ交流电牵引采煤机的试验晋城矿务局王台铺矿李勇学我局老区三矿中厚煤资源逐渐减少，充分进行薄煤层资源的开采对保持我局持续稳定发展至关重要。为此，从１９８８年开始我们曾先后试验过日本三井三池ＭＣＬＥ３００—ＤＲ７５７５型爬底板式采...     

MG200/450-WD型薄煤层采煤机

ＭＧ２００／４５０ -ＷＤ型采煤机是根据当前我国薄煤层高产高效生产的迫切需要 ,由煤炭科学研究总院上海分院和大同矿务局联合研制的采用多电机横向布置驱动、交流电牵引技术的新一代薄煤层采煤机 ,在井下工业性试验期间 ,取得了最高日产４０１８ｔ、最高月产９５４９８ｔ的好成绩 ,创国内同类采高开采设备最高产量记录。该采煤机的研制成功可为我国薄煤层生产提供一种新型高效开采设备 ,改变我国薄煤层生产长期存在的效率低、经济效益差的局面。１主要技术性能指标ＭＧ２００／４５０-ＷＤ型采煤机主要技术指标如下：适用采高范围１．０…     

电牵引采煤机工业性试验及改进

介绍国产第一台ＭＧＴＹ４００／９００－３．３Ｄ型地功率交流电牵引采煤机的主要特点、工业性试验中出现的主要问题、改革措施及建议。     

科研成果

科研成果ＭＧ３００（２×３００）－ＧＷ型采煤机由煤科总院上海分院承担研制、鸡西煤矿机械厂制造并在阜新矿务局五龙矿完成井下工业性试验的国内自行设计、制造的ＭＧ３００（２×３００）－ＧＷ型厚煤层（４．５ｍ）一次开采用采煤机，经专家评议，于１９９３年１２月...     

MG200／475－W型采煤机

ＭＧ２００／４７５－Ｗ型采煤机大屯煤电公司综机租赁站王安生１９９１年２月，煤炭科研总院上海分院、上海冶金矿山机械厂和大屯煤电公司三方决定，共同研制开发适合大屯矿区地质条件的中厚煤层大功率、液压无链牵引采煤机，即ＭＧ２０－０／４７５－Ｗ型。１９９４年７...     

MG463DW机载电牵引采煤机交流变频调整系统

介绍了ＭＧ４６３ＤＷ型机载电牵引采煤机交流调速系统的结构、工作原理及牵引特性。     

MG300系列采煤机改进与提高

ＭＧ３００系列采煤机改进与提高煤炭科研总院上海分院陈金豪ＭＧ３００—Ｗ型滚筒采煤机是“六五”期间国家科委下达的专项科技攻关项目，由上海分院设计，鸡西煤机厂制造，１９８６年４月由国家科委主持组织技术鉴定、随后投入批量生产。１９８７年开始进行系列化设计，...     

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。