新型电耙运搬出矿系统与设备的工业试验研究

缓倾斜中厚-厚矿体的采矿，因采场出矿运搬效率低，采切工作量大等突出问题，一直被视为一世界采矿难题，试验运用先进的振动助充技术与YZZ型振动助流器，优化配置传统电耙运搬设备，同时采用高效的YSP型水炮劈石器进行大块二次破碎，首创一各高效，低成本的堑沟受矿振动助流采场出矿运搬系统，实践表明，本系统具有出矿能力大（比传统重力自溜电耙出矿提高45%），采切工程量少，效率高，同时结构简单，施工容易等显著特点。     

振动助流电耙运搬放矿机理研究

从放矿分析和出矿口有效高度计算两方面,对振动助液放矿机理进行理论研究,论证了在传统的电耙运搬底部结构中引入振动助流技术,可以有效地改善矿石的流动性,从而提高采场出矿能力,降低采矿成本。     

空场采矿方法在肖坂金矿的应用

介绍了在肖坂金矿应用全面采矿法、房柱采矿法和电耙留矿法采矿的情况,包括矿块构成要素、采准切割工作、回采与采场通风、各自的主要技术经济指标以及矿柱回收和采空区处理等内容。提出应根据开采地质条件选择采矿方法,才能取得相应的效果,并能保证作业安全。     

矿石回收率指标的提高

阶段强制崩落法各方案已在厚矿床开采中得到广泛应用,这些方案都规定用大爆破挤压崩矿,用大功率电耙及各种类型的振动放矿机分区放矿。此法的特点是技术经济指标高,采矿法结构简单,可以采用高效率设备进行采准和回采。     

振动出矿阶段强制崩落法的试验研究

中国易门矿务局凤山矿采用有底柱深孔分段崩落法回采,历年来技术经济指标较好。但这种采矿法底部结构复杂,电耙出矿效率低,千吨采切比高,采准时间长,电耙巷道维修工作量大,卡斗、悬拱现象严重,安全性差。在用现有的设备、工艺条件下,劳动生产率难以进一步提高。为此,开展了振动出矿阶段强制崩落法的试验研究。从1983年至1988年先后在凤山矿21号、29号两个矿体进行了三个采场的工业试验,取得了较好时效果。这一工艺及振动出矿设施已在     

某缓倾斜磷矿采矿方法优化研究

某磷矿生产初期采用电耙出矿房柱采矿法,后电耙被列入矿产资源节约与综合利用限制类技术目录,故矿山企业委托设计单位对采矿方法进行优化,针对优化后的分段房柱采矿法结构参数、采切工程、回采工艺、经济效益等进行了介绍。矿山应用实践表明,优化后的采矿方法能够有效的提高矿块生产能力和生产效率,降低采矿成本6.25%。     

锚杆预控顶爆力运搬采矿法的试验研究

文中叙述了在潼关金矿缓倾斜中厚矿体条件下试验预控顶爆力运搬采矿法的采场构成要素,采准切割工艺,回采工艺,特别是为节省开拓工程量应用了电耙装车台技术等。一、矿床开采技术条件及开拓潼关金矿位于小秦岭东西构造带的北西缘,矿体赋存在太古界太华群深度变质的片麻岩系之中,矿床成因为中低温热液充填型。矿床严格受断裂构造控制,以脉状、透镜状沿构造带分布,矿石类型以自然金、黄铁矿、脉石英型     

易门铜矿振动出矿阶段崩落采矿法试验取得较好效果

云南易门铜矿为解决分段崩落法电耙出矿工艺采切千吨比过高,个别采空区垫层厚度难以确保、不安全等问题,从1983年8月3日至1984年11月底,在凤山分矿8中段21号矿体进行了振动出矿阶段崩落采矿法试验研究,共放出矿石8.3万余吨。试验主要内容:①取消了电耙巷道和采场     

中深孔超前切顶房柱法在缓倾斜中厚矿体中的应用

中深孔超前切顶房柱法改进了传统房柱法的回采方案,较好地解决了高大空场采矿作业的安全与采场运搬问题。本文介绍该法的回采方案及采矿工艺;并将技术经济指标与分段空场法加以比较。     

大新锰矿西北采区采矿方法创新设计及三维可视化

基于大新锰矿西北采区矿体产状异常复杂的特征,开展了采矿方法创新设计研究,并利用3DMine软件建立了各矿块采矿方法三维可视化模型。研究创新设计了电耙-爆力协同运搬伪倾斜房柱采矿法,矿块内矿房和矿柱交替布置,回采矿房时留规则矿柱以维护顶板岩石,矿房回采结束后将连续矿柱切割成点柱进行回收,矿石最大限度被采出;矿体及采矿方法以三维可视化方式的呈现,缩短了设计周期,提高了设计的准确度,增加了矿山作业人员对矿体形态认知的清晰度和采矿技术的熟练度,进而提高了施工效率,保证了作业人员安全,提高了矿山经济收益。     

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。