人造卡邦金刚石研究

人造卡邦金刚石是用特种石墨和触媒在７７ｋｂ（７７００ＭＰａ）以上压力和１５００°Ｋ左右温度下合成的。经微观和宏观检测，它具有结构致密、晶粒间以金刚石键相结合的微观特征，与天然卡邦结构相近；它在宏观上表现出显微硬度高（相当于天然单晶）、抗压强度高、耐磨性好、颗粒大、可指定成形等优点及耐热性差的不足。人造卡邦金刚石的研究成功并将它应用于工业、国防和科技各个方面，使当今人造金刚石发展跃上新台阶。     

1993年地矿部探矿工程三大科技成果

１９９３年地矿部探矿工程三大科技成果１９９３年，地矿部探矿职工在改革开放大潮中，生产不忘科研，取得３项重大科技成果。１．人造卡邦金刚石研制成功人造卡邦金刚石是当代人造金刚石高层次的全新型超硬材料，它的粒度大，密度高，硬度和耐磨性以及热稳定性、抗破碎强...     

包覆膜对金刚石生长过程的作用研究

利用俄歇电子能谱仪对人造金刚石表面的包覆膜进行了成分分布检测，结合显微组织分析，探讨了金刚石表面包覆膜对人造金刚石生长的作用，提出了触煤作用下人造金刚石的生长模式。     

卡邦金刚石拉丝模镶套工艺研究

本文从分析卡邦金刚石的特点出发，深入探讨了瞳邦金刚石拉丝械镶套工艺的各个方面，在此基础上，总结出一套比较成熟的卡邦金刚丝模粉末套工艺。     

人造金刚石中包裹体的光学显微镜观察

作者用光学显微镜对人造金刚石进行了系统观察，发现人造金刚石中有较多的杂质包裹体，主要是平行层面的片关包裹体和沿生长线排布的微料包裹体。文中对两种包裹体的形成条件和方式进行了讨论。     

人造金刚石提纯去石墨新工艺的研究

通过研究和试验，提出一种经济合理、有效降低污染的人造金刚石提纯去石墨方法──硫酸法。通过近百万克拉人造金刚石提纯表明，本方法完全可以用于工业生产．     

高温高压下六方石墨、高纯钴及镍锰合金的结构转化

石墨是目前人造金刚石使用的有效碳素材料,但用不同牌号、不同产地的石墨合成金刚石的效果却大不相同。为了探索这种现象的内在原因,我们对国内合成金刚石常用的几种石墨进行了X射线微观结构分析。实验结果初步证实了石墨的ⅠⅡⅠ型结构向ⅠⅡⅢⅠ型结构转化的存在。同时,对触媒的结构研究表明,在高温高压下其结构转化和石墨的结构转化有着密切的相应性。     

选矿技术与人造金刚石分选

人造金刚石的提纯和分选从技术上来说完全属于选矿工艺技术范畴.在合成棒破碎、石墨分离和选型等许多工艺中都已成功移植了选矿技术.磁选也是一种对人造金刚石分选非常重要的工艺.较详细介绍了专门设计研制的、已被人造金刚石行业广泛采用的MS-03型磁选机的性能特点.提出了一些人造金刚石行业尚未解决的技术难题,以期与选矿业的专家共同探讨,使人造金刚石的分选技术进一步提高、完善.     

Fe-Ni粉状触媒合成金刚石的成核研究

通过对Ｆｅ－Ｎｉ粉状触媒的独特性研究,提出了金铡石成核和生长模型,并探讨限粉状触媒在金刚石成核和生长过程中的主要影响因素,通过控制某些元素、氧化物和氮化物嫖质的含量和分布,可提高Ｆｅ－Ｎｉ粉状触媒质量,获得优质人造金刚石。     

磁流体静力分选机分选人造金刚石中的石墨

<正> 从合成金刚石的压机中所得到的金刚石合成棒,其中金刚石约占棒重量的1—8％,石墨约占10—13％,叶腊石约占10％,其余70％左右皆为触媒金属。金刚石、石墨、触媒金属三者由于高温高压的作用比较牢固地粘合在一起,不易分离。工业上要求人造金刚石的纯度为100％,以往是将合成棒用酸溶或电解腐蚀金属触媒后,再经一系列的化学处理得到纯净的人造金刚石。近年来,为了减轻对环境的污染,尽量降低化学试剂的用     

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。