抗粘钢炉内辊的设计

分析了炉内辊粘钢机理，从结构和材料两方面提出了解决炉内辊粘钢问题。经过某钢厂的现场实验，表明该设计很好地解决了这一问题。     

高精度大型瓦楞辊表面吊挂式离子强化处理工艺研究

叙述了用ＬＤ３－１５０Ｄ型吊挂式离子轰击强化炉，对３５ＣｒＭｏ钢制高精度大型瓦楞辊进行离子轰击经化处理，在５３０－５５０℃温度下，炉内压力为１０５０－１３００Ｐａ时，处理后瓦楞辊的表面硬度从Ｈｖ０．３３１５－３２８提高到ＨＶ０．３７５０－８００，工作寿命提高２倍以上。     

连续退火炉在线打磨炉辊方法

介绍连续退火炉底辊黏附物造成带钢上表面硌坑现象的处理方法。减少带钢麻点需要消除退火炉底辊上的黏附物。检修开炉清洁辊面的方法可以很好地清理黏附物,但影响生产、费时较长、成本较高。现通过自动控制使其中某一个炉辊与其他炉辊产生速度差,从而使炉辊与带钢产生相对摩擦,通过带钢摩擦使辊面的黏附物脱落。本方法不仅可对炉辊进行摩擦清理工作,而且可以按照需要进行定时、定量、定循环打磨。     

光面对辊破碎机辊筒直径的确定

光面对辊破碎机在冶金、煤炭、有色、建材等行业被广泛地应用。光面对辊破碎机适宜的破碎比一般为3（或4）～1，给至该设备的给料粒度范围一般为13～102mm，产品粒度范围从13mm到大约20网目。光面对辊破碎机能产生很少的细粉物料并无过大粒度。辊简直径是光面对辊破碎机最重要参数之一，辊筒过小将造成物料不能被辊筒咬住（被抛出），使破碎机不能有效地工作。因此，慎重地合理地确定对辊破碎机辊筒直径是十分重要的。对辊破碎机辊简直径是随着两辊之间的间隙，给料粒度及被破碎物料的内摩擦系数而变化的。给料直径、辊筒及辊筒间距之间比较…     

某钢厂高炉炉基冷却处理工程实录

根据工程实例，介绍了钢厂高炉炉基冷却降温的设计与施工。实践证明，采用在炉底耐火层与炉基钢筋砼之间的素砼垫层内钻孔布设水平放射状的双层冷却管，向内管注入冷水、经外管和内管之间的环状间隙流出并带出热量的循环水冷却方案，对降低高炉炉基及炉底温度并将其控制在一个确保高炉正常工作的允许温度范围、维持炉基安全并减缓炉底熔蚀、延长一代炉龄、节省巨额的高炉翻修费用切实可行，技术经济效果显著。     

辊压机与粉碎工艺的改进

高压对辊磨机（简称：辊压机）是一种新型粉碎设备。与对辊破碎机相似，它的主要工作部件也是一对平行排列反向转动的辊子，物料在两辊间受载而破碎。然而，这两种设备在工作原理上却很不同（图1）：对辊破碎机用于破碎作业，破碎比小，两个辊子的位置相对固定，物料主要以单粒受载机制被破碎、辊压机用于固体物料的细磨，它的两个银子一个位置固定，另一个可在滑道上平移而影响两辊间隙的大小。很高的工作压强来自作用于滑动辊辊轴上的液压系统。物料在上方以阻塞流动的方式供给，被辊子咬入后在两辊之间的作用空间内形成一层由许多颗粒组…     

辊矫直机压下平衡系统改造

当矫直机工作辊之间没有轧件时，由于上工作辊及其附 件的重力作用，在上工作辊托架和压下螺丝之间，压下丝杆和螺母之间会产生间隙，这样，当轧件咬入工作辊时，会产生冲击。为了防止这种情况发生，十一辊矫直机采用工作辊平衡系统，使上工作辊托架紧贴压下螺丝端部并消除螺丝之间的间隙，同时，这种平衡系统抬升上工作辊，调节矫直厚度。 液压式平衡系统是用液压缸的推力来平衡上工作辊及其附件的重量。系统中，用蓄能器、油泵来周期性地补充液体的漏损，这种液压平衡装置使用方便、工作可靠，而且可以使工作辊开口度增大，便于检修和处理…     

炉卷轧机支撑辊缺陷修复方案研究

根据炉卷轧机的特点和支撑辊的工况,对出现缺陷的支撑辊提出2种修复方案,运用NX Nastran软件对不同修复方案进行有限元分析,根据分析结果及强度要求选定合理的修复方案,修复后支撑辊的疲劳寿命满足设计要求。     

镶针式多辊梳石棉机

我国现有梳石棉机两辊齿与齿之间留有空隙，既难于调节，又易破坏纤维，且石棉易缠绕在辊上，引起工效下降。作者设计的镶针式多辊梳石棉机，辊与辊之间的梳石棉针是搭接的，可避免上述缺点，使用中还可提高出棉率。     

基于EDEM不同转速的煤炭破碎效率分析

破碎机的工作转速与物料硬度之间的关系直接影响破碎效率。基于离散元仿真软件EDEM，针对不同的物料、工作转速对分级破碎机的破碎过程进行仿真分析，得到了物料硬度与齿辊转速、破碎时间的关系，为分级破碎机的设计和实际生产提供了理论依据。     

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。