镍渣微晶玻璃核化及晶化制度的研究

以金川镍渣为主要原料采用熔融法制备建筑装饰用微晶玻璃。在成分研究的基础上，通过DSC测试、XRD、SEM和光学显微镜等分析手段，对添加了10wt％TiO2作为晶核剂的CaO-MgO-Al2O3-SiO2系统镍渣微晶玻璃试样的主晶相及微观结构进行了分析，得出了适用于该系统镍渣微晶玻璃的最佳热处理制度。     

复合尾矿微晶玻璃的组成设计与显微结构分析

以CAS系统相图为配料依据,以钢渣、粉煤灰、铜尾矿及砂岩为主要原料采用熔融法制备微晶玻璃。通过基础玻璃的DTA曲线确定最佳基础玻璃配料组成。借助于XRD、SEM及EDS确定了微晶玻璃的显微结构,结果表明:其主晶相为透辉石,晶粒形貌为颗粒状,晶粒尺寸约0.5μm,主要元素为S i、Fe、A l、Ca以及0。并探讨了基础玻璃的组成、晶核剂的选择等问题,对其主要性能进行了测试。     

以钠长石粉为原料制备微晶玻璃饰面材料

研究了以钠长石粉为主要原料制备微晶玻璃装饰板条件,由于钠长石粉的主要成分为SiO2和Al2O3,选择CaO-Al2O3-SiO2系统为玻璃配方依据,探讨了烧结法工艺的核化、晶化温度对制品的影响,获得了主晶相为β-硅灰石及固溶体的微晶玻璃装饰板。     

以钾长石尾矿为原料制备微晶玻璃饰面材料

研究了以钾长石尾矿为主要原料制备微晶玻璃装饰板的条件。由于钾长石尾矿的主要成分为 Si O2 和 Al2 O3 ,选择 Ca O、Al2 O3 、Si O2 系统为配方依据 ,探讨了碎粒法工艺核化温度、晶化温度对产品的影响 ,获得了主晶相为 β-硅灰石的微晶玻璃装饰板。     

高炉渣制备微晶玻璃的研究进展

微晶玻璃是一类含有微晶相和玻璃相的多晶固体材料,是特定组分的基础玻璃在一定的热处理制度下通过控制晶化作用制得的一种功能性材料,兼具玻璃的基本特性和陶瓷的多晶特性,因此具有良好的化学稳定性和物理稳定性,目前已被广泛应用于建筑装饰、电子电工和机械化工等领域。利用废弃高炉渣生产微晶玻璃不但可以固定炉渣中的有害成分,还可以降低成本,产生一定的经济效益,因此这是一项具有环保和经济双重效益的生产技术。文章主要概括了以高炉渣作为原材料制备微晶玻璃的发展历程,系统阐述了国内外对于晶核剂的作用机理、提高微晶玻璃的性能、主晶相的选择以及晶化方式等方面的研究进展,并介绍了高炉渣微晶玻璃的制备原理、工艺方法、晶核剂和热处理制度的选择依据,同时简要叙述了微晶玻璃按照不同标准的分类情况及其性质和应用。     

利用铜矿尾矿制备微晶玻璃试验研究

某铜尾矿主要矿物成分为石英、方解石、绿帘石、赤铁矿等,属高铁、低硅型尾矿,采用原料加工-配料混匀-熔制玻璃-水淬成粒-过筛-铺料装膜-烧结流平-晶化成型-抛磨-切割-成品检验工艺,生产CaO-MgO-AL_2O_3-SiO_2四元系统的微晶玻璃,产品主要技术指标达到GB/T13981-2008标准。     

利用硫铁矿尾矿制备微晶玻璃

以硫铁矿尾矿制备微晶玻璃,并用DTA、XRD、SEM等手段分析了微晶玻璃的相变、相组成及微观结构。结果表明,利用硫铁矿尾矿为主要原料,添加适量的其他原料,可获得主晶相为透辉石相的微晶玻璃。     

赤泥微晶玻璃的研究

以赤泥为主要原料,配以其它化工原料制备了性能优异的微晶玻璃。采用ＤＴＡ、ＸＲＤ、ＳＥＭ等手段研究了赤泥微晶玻璃的晶相组成和结晶形貌。结果表明,赤泥微晶玻璃的主晶相是钙铁透辉石,次晶相为钙铝黄长石。     

黄金矿尾砂综合利用研究

介绍了黄金矿尾砂制造微晶玻璃花岗石的研究。研究表明，用黄金矿尾砂为主要原料引入CaO、MgO等成分，形成CaO－Al2O3－SiO2系微晶玻璃。以此为基体，添加各种着色剂及助剂可制成各种颜色的微晶玻璃花岗石，制品的各项物化性能达到天然花岗石，是一种优良的装饰材料。     

利用钢铁炉渣制备微晶玻璃技术

从制备工艺，热处理制度、微晶玻璃形核和晶体长大等方面综述利用钢铁炉渣制备矿渣微晶玻璃技术的研究和应用进展。用钢铁炉渣制备微晶玻璃，一方面替代天然石材和黏土矿资源，避免矿物开采所造成的环境破坏，另一方面变废为宝，消除钢铁废渣对环境的污染。成分设计、成型工艺、热处理制度以及合适的晶核剂是利用钢铁炉渣生产微晶玻璃的关键。微晶玻璃耐磨性、硬度、耐腐蚀性、机械强度都较高，可广泛应用于建材、电子、光学、化工、机械等领域。     

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。