综掘工作面短距离综合除尘技术的研究与应用

针对综掘工作面大功率综掘机掘进速度快、作业地点粉尘浓度大,现有的防尘设施、除尘技术不能满足职业安全健康要求的情况,创新性地提出短距离综合除尘技术解决综掘工作面的粉尘问题。文章介绍了短距离综合除尘技术的高除尘、强控尘机理,并在济阳矿井三采一层集中运输巷综掘工作面应用,使用短距离综合除尘技术后,粉尘被封闭在掘进工作面30m范围内,极大地改善了作业环境,并降低了综掘机司机处的粉尘浓度。     

涡流控尘技术在综掘工作面中的应用研究

针对综掘工作面大功率综掘机掘进速度快、作业地点粉尘浓度大,现有的防尘设施、除尘技术不能满足职业健康要求的情况,创新性地提出涡流综合除尘技术解决综掘工作面的粉尘问题。文章介绍了涡流综合除尘技术的高除尘、强控尘机理,并在济阳矿井三采一层集中运输巷综掘工作面应用,使用涡流控尘技术后,粉尘被封闭在掘进工作面30米范围内,极大地改善了作业环境,并降低了综掘机司机工作地点的粉尘浓度。     

除尘风机与综掘机开停闭锁联动通风防尘技术研究与应用

基于综掘工作面长压短抽通风除尘应用现状的分析,提出以除尘风机与综掘机开停闭锁联动实现通风除尘,实现了地面远程化、实时化、自动化防尘管理,同时可作为子系统为综掘工作面自动化、智能化开采技术提供技术支持。     

综掘机机载除尘装置的研究与应用

分析了综掘巷道除尘技术现状,研制了一种新型的机载除尘装置,该装置能实现位置可调和随综掘机掘割时前后移动、掘割部万向复合运动。同时研究了除尘装置的结构,使之能与综掘机配套使用,以达到快速降尘的目的,改善综掘工作面的作业环境。该项成果是综合机械化掘进的高效除尘装置,可使综掘除尘治理技术提高到新水平。     

远程遥控智能综掘面高效泡沫除尘技术

为适应远程遥控智能综掘工作面快速高效除尘的需要,提高综掘机截割煤体期间综掘面迎头的能见度,在综合分析对比传统除尘方法的基础上,提出了适用于远程遥控智能综掘工作面快速高效除尘的泡沫除尘技术.在传统泡沫除尘技术工艺的基础上进行了升级改造,增加了风水连锁单元及远程控制单元,提高了技术的自动化及智能化水平.实践结果表明,泡沫除...     

矿用湿式过滤除尘器在综掘工作面的应用

详细介绍了 KGC－Ⅱ型除尘器在综掘工作面与 AM－ 50型综掘机配套使用情况 及除尘效果,总结了其优缺点及使用中应注意的问题,为以后综掘工作面防治粉尘提供参考 。     

综掘工作面除尘技术研究

该文通过对综掘工作面粉尘来源的分析,以及目前综掘工作面除尘方法及装置的研究,提出了新的综掘工作面除尘方法,有效减少了综掘工作面粉尘量。     

综掘工作面振弦式除尘风机的应用

随着矿井开采机械化水平不断提高,综掘机得到广泛应用,综掘机工作时产尘大,环境空气污染严重。为治理综掘工作面煤尘污染,引进了振弦式除尘风机,在现场应用后取得了良好效果。     

湿式综合除尘系统在斜井综掘工作面的运用

针对国内大功率的综掘机被越来越多地运用于斜井掘进的现实情况,为了解决由此带来的综掘工作面粉尘量急剧增加问题,设计出湿式综合除尘系统,通过湿式除尘器并配合除尘风机,确定出合理的风筒口与工作面的距离,并科学合理地布置综掘面通风除尘系统.实践表明:现场综合测定湿式除尘器的总降尘效率在91％以上,呼吸性粉尘的除尘效率也达到86％,从而有效地达到斜井综掘工作面降尘目的.     

综掘工作面封闭式除尘工艺

根据综掘工作面巷道断面的粉尘分布规律,针对兖州矿区煤层低瓦斯的实际,研制了以挡尘帘封闭控尘为主并配以抽出式除尘通风和综掘机内外喷雾为辅的封闭式综合除尘工艺,通过在兖矿集团鲍店煤矿5306②轨道顺槽综掘工作面的现场应用,取得了很好的降尘效果。     

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