黑沟矿高深溜井井筒堵塞诊断及处理实践

溜井井筒堵塞位置及堵塞形式的诊断,是溜井井筒堵塞处理的前提和重要依据,是溜井堵塞处理的难 点之一。 针对黑沟矿主溜井一次井筒堵塞问题,通过分析高深溜井矿石移动规律,排除了片帮体和大块咬合拱堵塞 的安全隐患,判定堵塞形式为粉矿黏结拱,并采用“回声定位”和“喘气判定”两种方法,确定了大致的堵塞部位。 针对 堵塞位置和堵塞形式,结合现场实际,依靠双孔模式,采用“破拱脚”和“爆震”处理方法,用“水浸”方式完成破拱,成 功消除了高深溜井井筒堵塞。 研究结果对于类似矿山溜井井筒堵塞处理有一定的参考价值。     

兰尖矿2号溜井堵塞疏通实践

本文通过对兰尖矿2号溜井投产后发生堵塞的原因和历次疏通处理的情况和方法介绍，说明了溜井在施工建设中保证施工质量、加强生产管理预防溜井堵塞的重要性和溜井堵塞疏通处理中应注意的问题。     

溜井堵塞原因分析及处理方法

针对三鑫公司的溜井和漏斗堵塞情况，分析了其堵塞原因，提出了可行的处理办法，并对如何预防溜井和漏斗堵塞进行了论述。     

尖山2号溜井堵塞疏通实践

本文通过对尖山 2 # 溜井投产后发生堵塞的原因和历次疏通处理情况的分析 ,说明了溜井在建设中保证施工质量、加强生产管理预防溜井堵塞的重要性和溜井堵塞疏通处理中应注意的问题。     

高深溜井井筒堵塞处理技术的探讨

高深溜井井筒堵塞处理是矿山生产中遇到的比较危险且施工难度较大的复杂工程,结合镜铁山矿黑沟2#溜井堵塞的处理实践,探索了高深溜井堵塞处理技术,总结了处理高深溜井堵塞的成功经验。     

大断面长溜井高位堵塞疏通处理实践研究

介绍了新白马公司1#溜井在起用较短时间后就出现高位堵塞情况,通过对发生高位堵塞的类型的判断,对造成高位堵塞的原因进行了详细研究,同时制订了溜井高位堵塞的多种疏通处理方案,并加以实施最终将堵塞处贯通,总结分析露天矿山溜井在设计施工建设阶段和生产使用过程中的注意事项,以及如何避免发生溜井高位堵塞和溜井高位堵塞时的疏通处理方法。     

溜井堵塞处理的安全防护

本文通过对溜井堵塞现象的分析,针对堵塞原因和不同部位的不同特点,提出了相应的安全处理对策,为今后溜井堵塞处理安全规程的制订提供了第一手材料。     

南方露天矿山溜井堵塞机理分析

溜井是许多露天矿山的咽喉工程，溜井堵塞对矿山安全和经济效益影响很大，受矿石性质和溜井结构客观因素影响，溜井堵塞普遍存在。文中结合国内南方几座露天矿山溜井堵塞情况，对其堵塞机理进行了分析研究。     

中深孔爆破处理主溜井堵塞在谦比希铜矿的应用

谦比希铜矿主溜井当前承担着主矿体全部矿石及西矿体大部分矿石的溜放任务,因西矿体矿石遇水容易泥化,在进入主溜井后,极容易造成主溜井堵塞和悬顶,给井下安全生产带来极大影响。溜井堵塞和悬顶后,若采用传统方式处理,存在安全风险高、处理效率低、处理成本高等缺点,特别是当悬顶高度较高时,人不能进入溜井,很难判断堵塞和悬顶具体位置,给处理工作带来很大难度。为此,事先采用红外线观测,在准确判断堵塞位置后,运用中深孔爆破成功处理主溜井堵塞,克服了传统处理的缺点,较传统处理方法处理时间至少缩短2 d以上。     

尖二号溜井的堵塞与处理

分析了兰尖铁矿尖山采场二号溜井多次堵塞的原因和处理方法，并提出了“自然疏通”方案。     

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。