ELM系列掘进机,转载机等设备组成的掘进机械化作业线

对ＥＬＭ系列掘进机、转载机等设备组成的煤、半煤岩巷掘进机械作业线从技术和工艺等方面进行了改进，改进后的作业线更趋完善，创造了极为显著的经济效益和社会效益。     

掘进工作面排热通风浅析

掘进工作面排热可采用通风、降温或两相结合的方法。掘进工作面热平衡分析表明，工作面进风温度越低，工作面排热所需风量越少。排热通风成本由空气冷却费和通风动力费构成，掘进工作面排热通风总费用分析，进风温度高于或略低于工作面临界温度时尽可能采取降温措施，降低排热成本。进风温度低于工作面临界温度，采用降温与通风相结合的方式时，存在成本最低的掘进工作面最佳排热通风量。     

掘进工作面短壁煤层注水实践与应用

该文针对煤巷、半煤岩巷掘进工作面短壁煤层注水的适应条件、注水工艺进行了研究,并根据现场掘进工作面煤体注水效果进行了分析,对进一步实施煤巷、半煤岩巷掘进工作面煤层短壁注水具有一定的指导作用。     

夹河煤矿控制掘进工作面瓦斯超限的做法

简述了夹河煤矿随着矿井开采深度的延深,采掘工作面瓦斯涌出量变化情况和近几年煤巷、半煤岩巷掘进工作面瓦斯超限次数递减情况;详细分析了该矿不同时期煤巷、半煤岩巷掘进工作面瓦斯超限的各种原因;介绍了该矿从矿井供电系统、局部通风装备、局部通风管理、地质构造、矿井停产检修等方面采取的控制掘进工作面瓦斯超限的针对性措施,以及控制掘进工作面瓦斯超限的做法。     

半煤岩巷道机掘工作面综合防尘技术应用

随着掘进工作面生产现场综合机械化程度的不断提高,煤矿半煤岩巷道掘进方式逐渐由放炮掘进改为综掘,显著地提高了掘进效率,保障了施工安全,降低了职工的劳动强度,但是也带来了新的问题:半煤岩巷道机掘过程中,产尘量增大。为了解决此问题,文章分别针对半煤岩机掘巷道迎头、转载点以及回风巷道3个位置进行治理,形成了半煤岩巷道机掘工作面迎头以除尘为主、转载点以控尘为主、回风巷道以捕尘为主的综合防尘体系,有效地降低了半煤岩机掘巷道的粉尘浓度。     

半煤岩综掘巷道螺旋风流发生器的研制与应用

为有效解决半煤岩综合机械化掘进工作面掘进机产尘量大,矿井半煤岩综掘工作面粉尘捕集设备效率低、尘源控制效果欠佳的问题,研制了一种新型的螺旋风流发生器,进而形成螺旋风流封闭式控尘技术工艺,并应用于南屯煤矿。实践证明,该工艺能够有效控制并捕集半煤岩综掘工作面的粉尘,阻止含尘气流的扩散运动,在半煤岩综掘工作面防尘工作中取得了较好的应用效果。     

ZM_Z50-40型装煤机通过技术鉴定

<正> 由北京煤机厂设计、广东煤机厂制造的国家“六五”科技攻关项目ZM_z5-40型装煤机最近通过了技术鉴定。ZM_z5-40型装煤机是中型蟹爪式装载设备,该机适于在7～12m~2断面的掘进工作面和采煤工作面进行装载作业,也可用于地面,能装载煤、半煤岩、软岩或其他物料。该机安装有机械传动过载保护装置和履     

蒙大矿巷道高效快速掘进系统设计与应用

为了解决蒙大矿目前巷道掘进配套设备搭接行程短,掘进效率低等问题,通过研究蒙大矿煤层地质条件、巷道规格和施工工艺,开发设计一套以掘锚机、液压锚杆钻车、大跨距桥式转载机和履带行走式自移机尾为主要设备的高效快速掘进系统,该系统满足巷道日进尺50m的工程要求,将整体掘进效率提高2.5倍。该系统在蒙大矿3-1煤层,31104回风巷掘进工作面进行应用。应用结果表明:截止目前该系统日平均进尺45m,月平均进尺1100m,满足使用和设计要求。同时该系统也为3000m以下巷道掘进工作面提供了可选方案。     

ZMC-30型装煤机在半煤岩掘进工作面的应用

桑树坪煤矿在南一3208回顺半煤岩巷掘进工作面成功的进行了ZMC-30型全液压侧卸式装煤机的试验应用,为煤巷、半煤岩巷掘进工作面全面取代人工装煤(岩),减轻劳动强度,提高掘进速度取得了经验。     

掘进工作面煤岩应力演化规律研究及其应用

为了研究掘进工作面开采过程中煤岩应力演化规律,以现场实际情况为工程背景,采用FLAC3D对掘进工作面不同掘进距离条件下煤岩应力集中和卸载程度进行了分析。研究得到:随着掘进距离的增加,工作面前方和上下帮位置的竖直应力集中程度和集中范围随之增加,工作面前方倾向应力集中程度和集中范围随之增大,对走向应力的变化趋势影响较小,走向应力始终处于卸压状态。     

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