煤矸石资源化利用途径及进展

概述了目前国内外煤矸石的产生、危害及利用。总结了煤矸石利用的技术和方法,从不同的角度对其进行了分类,可以按资源回收利用分类,也可以按工程利用方法分类。根据煤矸石利用的深度层次可分为直接利用型、提质加工型和综合利用型三大类。据此细致全面剖析煤矸石资源化综合利用途径,并对我国煤矸石深度开发前景进行了展望。     

煤矸石的分类及其综合利用

煤矸石的科学分类对于综合利用煤矸石具有重大的理论和实践指导意义。本文提出了煤矸石科学分类的意义，在总结前人煤矸石分类方法的基础上，进一步完善了煤矸石的分类方案，并给出了煤矸石的综合利用示意图。     

煤矸石及其国内外综合利用

概述了煤矸石的定义、来源及其资源化特性,以及煤矸石所带来的各种环境问题;涵盖了目前煤矸石的探索分析、应对策略、研究思路及方法,论述了煤矸石国内外资源化综合利用现状;总结了以往煤矸石研究利用的不足,同时提出优化建议,并对煤矸石深度开发前景进行了展望。     

煤矸石综合利用技术途径的探讨

介绍了国内煤矸石现状，按照煤矸石物理化学成分及利用方向进行了科学分类，列举了目前国内综合利用煤矸石产业化的技术示范，为煤矸石的治理和利用提供技术经验。     

加快循环经济步伐 强力推进煤矸石综合利用

煤矸石是我国排放量和堆积量最大的工业固体废弃物之一,但又是可以利用的较大的资源,只要加以利用,就一定能变废为宝。文中对部分产煤矿区的煤矸石的综合利用进行了调查和分析,总结了煤矸石综合利用中存在的问题,对今后煤矸石的综合利用提出了建议和应用方向。     

煤矸石特性及其资源化综合利用现状

在分析煤矸石性能的基础上,概述了煤矸石的主要分类方式、煤矸石机械力活化、热活化、微波活化以及复合活化的主要方式,结合近年来煤矸石综合利用的研究成果,总结煤矸石综合利用现状,对存在的问题进行综述,对煤矸石深入认识有助于其资源综合利用。     

煤矸石对矿山生态环境的破坏及其资源化

煤矸石是煤炭开采和加工过程产生的固体废弃物,具有废渣和资源双重属性.堆积成山的煤矸石对矿区和周围区域的生态环境造成较大的破坏,但如果合理利用,可以变废为宝.论述了煤矸石对矿山生态环境的破坏,分析了煤矸石资源化的主要途径,以及煤矸石今后综合利用的方向.     

浅谈煤矸石的综合利用

结合目前煤矸石品质及可利用途径,探讨了煤矸石有关的环境问题及利用现状,并对煤矸石利用的总体效益进行初步评价,阐述了近年来国家对煤矸石综合利用各项优惠政策.     

煤矸石处置与综合利用研究

为了减少煤矸石、粉煤灰、尾矿、废石、弃渣等固体废物的产生量,研究了煤矸石处置与综合利用技术,分析了孝义市煤矸石的产生和堆存情况、煤矸石的危害以及现阶段煤矸石的综合利用情况,研究了煤矸石处置与综合利用技术思路,确保煤矸石科学、无害化堆存以及煤矸石能够综合利用.重点分析了规模化利用技术,主要为煤矸石生产免烧透水砖、透水珠技...     

新疆煤矸石排放及其利用研究

文章对新疆煤矸石的污染现状、利用现状进行分析,并运用产值耗煤法对新疆煤矸石排放量进行预测,提出适合新疆煤矸石综合利用的防治方法,并对其可行性进行了论证。结果表明:新疆煤矸石的利用应以发电为主要方向,其次,考虑煤矸石做为生产建筑材料。     

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。