Quality evaluation and control of impregnated dia-mond bit

ＱＵＡＬＩＴＹＥＶＡＬＵＡＴＩＯＮＡＮＤＣＯＮＴＲＯＬＯＦＩＭＰＲＥＧＮＡＴＥＤＤＩＡＭＯＮＤＢＩＴＴｕＨｏｕｚｅＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＧｅｏｓｃｉｅｎｃｅｓ，Ｂｅｉｊｉｎｇ，１０００８３，ＣｈｉｎａＱＵＡＬＩＴＹＥＶＡＬＵＡＴＩＯＮＡＮ...     

ALL-COLUMNAR BOWL CENTRIFUGE FOR TREATING MUD

ＡＬＬ－ＣＯＬＵＭＮＡＲＢＯＷＬＣＥＮＴＲＩＦＵＧＥＦＯＲＴＲＥＡＴＩＮＧＭＵＤＬｉｕＹａｎｇＩｎｓｔｉｔｉｔｕｔｅｏｆＧｅｏｌｏｇｙａｎｄＭｉｎｅｒａｌＲｅｓｏｕｒｃｅｓ，ＢｕｒｅａｕｏｆＧｅｏｌｏｇｙａｎｄＭｉｎｅｒａｌＲｅｓｏｕｒｃｅｓｏｆＸｉ...     

USED（）函数的局限与改进

针对Ｍｉｃｏｒｏｓｏｆｔ Ｃ Ｖｉｓｕａｌ ＦｏｘＰｒｏ＾ＴＭ中ＵＳＥＤ（）函数的局限性，提出了彻底检查数据表打开状态的方法，并提供了该函数的部分源代码及调用方法。     

ADVANCES IN THEORETICAL RESEARCH ON ANNULAR HYDRAULICS AND CUTTINGS TRANSPORT

ＡＤＶＡＮＣＥＳＩＮＴＨＥＯＲＫＥＴＩＣＡＬＲＥＳＥＡＲＣＨＯＮＡＮＮＵＬＡＲＨＹＤＲＡＵＬＩＣＳＡＮＤＣＵＴＴＩＮＧＳＴＲＡＮＳＰＯＲＴＬｉｕＸｉｓｈｅｎｇ，ＷａｎｇＨａｉｇｅＵｎｉｖｅｒｓｉｔｙｏｆＰｅｔｒｏｌｅｕｍ，Ｂｅｉｊｉｎｇ１０００８３，...     

A NEW RELATIONSHIP EQUATION BETWEEN ENERGY CONSUMPTION IN EXPLOSIVE AND DISTRIBUTION OF PARTICLE SIZE

ＡＮＥＷＲＥＬＡＴＩＯＮＳＨＩＰＥＱＵＡＴＩＯＮＢＥＴＷＥＥＮＥＮＥＲＧＹＣＯＮＳＵＭＰＴＩＯＮＩＮＥＸＰＬＯＳＩＶＥＡＮＤＤＩＳＴＲＩＢＵＴＩＯＮＯＦＰＡＲＴＩＣＬＥＳＩＺＥＺｈａｎｇＱｉａｎｇ（ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔ...     

BLOOMING AND PROSPECT OF URBAN UNDERGROUND ENGINEERING

ＢＬＯＯＭＩＮＧＡＮＤＰＲＯＳＰＥＣＴＯＦＵＲＢＡＮＵＮＤＥＲＧＲＯＵＮＤＥＮＧＩＮＥＥＲＩＮＧＢａＺｈａｏｌｕｎＲｅｎＹａｎｒｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＰｏｓｔｇｒａｄｕａｔｅｓ，ＢｅｉｊｉｎｇＣｏｌｅｇｅｏｆＭｉｎｉｎｇＩｎｄｕｓｔｒｙ，Ｂ...     

英国GEC公司MiVAC 3．6S_1高压隔爆真空配电设备

英国ＧＥＣ公司ＭｉＶＡＣ３．６Ｓ_１高压隔爆真空配电设备徐州煤矿机械厂吴兆云我厂引进英国的ＧＥＣ公司的ＭｉＶＡＣ３．６Ｓ１高压防爆真空配电设备（以下简称“配电设备”）是８０年代中期国际先进水平的产品。其中高压绝缘监视器和接地保护装置是引进德国ＢＥＮＤ?..     

中速磨机弹性基础动态特性分析软件

中速磨机弹性基础动态特性分析软件的编程采用了三种软件,用ＶｉｓｕａｌＢａｓｉｃ可以很方便地进行交互式界面的设计,用ＭＡＴＬＡＢ可以方便、高效地进行复杂计算．用ＡｕｔｏＣＡＤ的ＶＢＡ可以方便地进行参数化绘图。本文研究了如何应用这下种软件进行联合开发、数据交换和相互调用的方法,提高了应用软件的编写效率、运行可靠性和求解精度等。     

EXPERIMENTAL INVESTIGATION ON CHEMICAL THERMODYNAMIC BEHAVIOUR OF SULPHIDE ORES DURING SPONTANEOUS COMBUST

ＥＸＰＥＲＩＭＥＮＴＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＮＣＨＥＭＩＣＡＬＴＨＥＲＭＯＤＹＮＡＭＩＣＢＥＨＡＶＩＯＵＲＯＦＳＵＬＰＨＩＤＥＯＲＥＳＤＵＲＩＮＧＳＰＯＮＴＡＮＥＯＵＳＣＯＭＢＵＳＴＩＯＮＷｕＣｈａｏ，ＭｅｎｇＴｉｎｇｒａｎｇＤｅｐａｒｔｍｅ...     

Fine particle removal from mud

ＦＩＮＥＰＡＲＴＩＣＬＥＫＥＭＯＶＡＬＦＲＯＭＭＵＤＫｏｎｇＱｉｎｇｘｉｎｇＤｅｖｅｌｏｐｍｅｎｔＤｅｐａｒｒｍｅｎｔ，ＤａｑｉｎｇＰｅｔｒｏｌｅｕｍＩｎｓｔｉｔｕｔｅ，Ａｎｄａ１５１４００ＣｈｉｎａＺｈｏｕＤｏｎｇｆｅｎｇＤｉｖｉｓｉｏｎｏｆＤｒｉ...     

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