粉煤灰作补强填料的研究

为了解决橡胶工业生产中由于炭黑、白炭黑作橡胶补强填料时成本过高的问题,通过采用适当的改性药剂对粉煤灰进行改性处理,使改性后的粉煤灰能够部分替代炭黑作橡胶补强填料。通过试验数据发现改性得到的粉煤灰部分替代炭黑作橡胶补强填料时的各种性能都接近甚至超过炭黑作橡胶补强填料时的性能。尤其是当改性粉煤灰以30%替代炭黑作橡胶补强填料时的效果更好。结果表明:用改性粉煤灰部分替代炭黑作橡胶补强填料具有重大的经济效益和社会效益。     

高岭土作橡胶填料的研究

高岭土经煅烧，粉碎，表面改性和处理后可制取橡胶补强填料，经改性处理对补强性能影响的实验研究表明：高岭土由于基本身性质的特殊性，极易在表面进行接枝改性；过３２０目筛，经含量为３％的处理剂表面后的高岭土填料对橡胶具有较好的补强作用，可完全替代碳酸钙或陶土，产生较好的补强效果，也可部分替代炭黑，降低生产成本，表６，参３。     

粉煤灰作橡胶补强填料研究

通过化学成分分析、X-射线衍射、扫描电镜等方法,分析了粉煤灰的性质,对粉煤灰进行化学改性,用改性粉煤灰代替白炭黑作橡胶补强材料,制品的抽出力基本达到国标,但不及煤粉炉燃烧后的粉煤灰改性后作橡胶补强填料的效果好,而且制品的密度高于用白炭黑的制品密度。     

改性粉煤灰填充橡胶的研究

研究了改性粉煤灰填充橡胶物理机械性能 ,结果表明 :经过改性处理的粉煤灰对橡胶具有良好的补强作用 ,可以完全替代CaCO3 、部分替代炭黑     

千枚岩粉体橡胶填料开发研究

根据矿物填料在橡胶中作用机理的分析和阜新千枚岩矿物组成特性的研究。采用粉碎和超细粉碎、化学改性等深加工手段，研发橡胶填料，实现了325目未改性千枚岩粉产品与轻质碳酸钙的等量替代；不同粒度(400目和1250目)千枚岩粉体化学改性处理后，产品替代了50％的半补强炭黑，并实现了产业化生产，开发了一种矿物橡胶填料和补强材料。     

粉煤灰制橡胶填料的研究

由于粉煤灰特殊的物理，化学性质，经过一定加工处理后可作像胶填料，技术指标和半补强碳黑相当，并且原料来源广，投资少，成本低，减少环境污染，经济效益和社会效益显著。     

表面改性高岭土作为橡胶补强填料的研究

高岭土经偶联剂表面改性后，对橡胶有较好的补强效应。产生补强作用的原因，主要是改性上与橡胶间有较好的相容性，水分子在改性土表面的吸附显著降低，以及偶联剂上的活性官能团促进了交联反应。     

凹凸棒石粘土填充橡胶研究

以凹凸棒土为原料,经理化处理制得填料,填充到橡胶中去,对填充橡胶的性能进行研究,结果表明：经过理化处理的凹凸棒土对橡胶具有良好的补强性能,并可完全替代原用的CaCO3、部分替代炭黑。     

膨润土的活化改性与在橡胶中的应用

采用热处理与机械力化学改性相结合的方法活化膨润土 ,可制备橡胶补强填料。热处理能有效驱除矿物的挥发份和结合水 ,活化结构 ,保证并提高干法机械力化学表面改性效果 ,使改性剂用量在 1%以下就能获得理想指标。采用此种方法制得的膨润土替代半补强炭黑量达 30 % ,橡胶制品各项物理性能符合国家标准GB3778- 94 ;10 0 %替代高耐磨炉黑 ,橡胶力学性能满足GB318- 98技术要求     

影响煤系高岭土表面改性效果的研究

通过分析改性煤系高岭土在橡胶中的补强作用及机理，研究了原料粒度、煅烧和改性剂配方对煤系高岭土表面改性效果的影响。高岭土粒度越小，与橡胶基体形成的界面层面积越大，补强效果越好。在同样的表面改性处理条件下，未煅烧煤系高岭土比煅烧高岭土的改性效果好，对橡胶的补强作用强。偶联剂类型和用量是影响表面改性的重要因素。     

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