某大型深凹露天矿排土工艺改造

大型深凹露天矿以汽车为主的传统运输方式成本较高,汽车—胶带机—排土机联合运输是深凹露天矿最有发展前途的运输方式之一.以国内某矿为例,研究汽车—胶带机—排土机运输系统的设备合理选型和优化配套,通过运营成本对比分析,证明其具有良好的经济效益.     

大型深凹露天矿高效运输系统综合技术研究

运输占大型露天矿生产总成本的50％左右，传统的汽车、铁路及其联合运输方式已不能适应深凹露天矿的运输要求，汽车一胶带半连续运输工艺是深凹露天矿最有发展前途的运输方式之一。本文以水厂铁矿为依托工程，研究了汽车-胶带半连续运输系统的设备选型及最佳配套技术、运输线路布设优化、胶带排土工艺及参数优化、系统可靠性分析、坑内单线陡坡联络道技术及系统高效运行保障技术等。分析了水厂铁矿建立-套汽车-胶带矿石运输系统和两套汽车-胶带排岩运输系统后可获得的经济效益。     

半连续运输系统与单线陡坡联络道在大型深凹露天矿的应用

本论文对露天矿主要的开拓运输方式进行技术经济评价,推荐在大型深凹露天矿采用汽车一胶带半连续运输系统,以提高综合经济效益.分析半连续运输系统的工艺特点和破碎站移置、胶带布线、排岩机排土、工作强度等关键生产技术环节.根据此运输方式的应用,首次提出在采矿场最终破碎站以上区位采用单线陡坡联络公路取代汽车运输公路,达到减少采场剥岩量,提高总体经济效益的目的.     

汽车-胶带半连续运输系统线路优化研究

介绍深凹露天矿开采时存在的突出问题及汽车一胶带半连续运输系统对大中型深凹露天矿具有的普遍适用性，指出该系统是我国未来深凹露天矿运输系统的重点发展方向。以首钢水厂铁矿东部排岩运输系统为例，采用优化理论对汽车一胶带半连续运输系统线路进行了优化研究，确定了最佳运输线路方案，并按该方案完成了现场施工。     

丘基卡马塔露天铜矿J—1北胶带运输系统及其电气设备（一）

丘基卡马塔露天矿是世界最大的露天矿之一，１９９０年采矿量５５００万ｔ，剥离量１４５００万ｔ。为了减少汽车运输费用，该矿于１９８４年安装了一套固定式矿石破碎－胶带运输系统，取得了较好的经济效益。经过对废石汽车运输方式同破碎－胶带－排土机运输方式的比较，该矿于１９８７年同由日本三菱公司和德国克虏伯工业技术公司组成的联合体签定了制造及安装整套破碎机、带式输送机和排土机系统（Ｊ－１北系统）的合同。该系统…     

大型深凹露天矿半连续运输系统研究

为了确定大型深凹露天矿的最经济合理的开拓运输方式,结合工程实例,通过对不同方案进行详细的技术经济比较,得出汽车-胶带联合运输的优越性,同时分析了半移动破碎站的合理移设步距,为大型深凹露天矿运输系统的建设提供了重要的指导依据。     

丘基卡马塔露天铜矿J-1北胶带运输系统及其电气设备(一)

丘基卡马塔(Chuquicamata)露天矿是世界最大的露天矿之一,1990年采矿量5500万t,剥离量14500万t。为了减少汽车运输费用,该矿于1984年安装了一套固定式矿石破碎-胶带运输系统,取得了较好的经济效益。经过对废石汽车运输方式同破碎-胶带-排土机运输方式的比较,该矿于1987年同由日本三菱(Mitsubishi)公司和德国克虏伯(KruPP)工业技术公司组成的联合体签定了制造及安装整套破碎机、带式输送机和排土机系统(J-1北系统)的合同。该系统的年设计能力为4100万t废石,小时能力可达9600t。本文介绍了整个系统的组成及有关电气设备。     

黑山露天煤矿3~#采区实现内部排土可行性分析

在汽车运输的深凹露天矿,为了缩短汽车运距,减少运输成本,在露天矿开采到一定深度时,根据煤层底板倾角变化、采掘现状和台阶到界情况,应尽可能地实现内部排土作业,在内排作业实施过程中,应充分考虑排弃方向、排土运输道路、排土台阶构成和排弃角度是否能满足安全作业要求。通过黑山露天煤矿3#采区的靶区研究,提出了实现内部排土作业的优化设计方案。     

深凹露天矿开拓运输专题讨论会

中国金属学会采矿学术委员会露天学组拟于1984年(具体时间另行通知)在辽宁省鞍山市召开《深凹露天矿开拓运输专题讨论会》。会议征文包括铁路运输、汽车运输、胶带运输、钢绳提升、以及各种联运等有关方面的内容,特别要着重于深凹露天矿开拓运输系     

某露天矿汽车转汽车—胶带排岩运输系统最佳时空衔接研究

我国大中型冶金露天矿山都已进入中后期开采，逐渐由浅部转入深部，并且大多数的开拓运输方式都以汽车运输为主，将面临着运距长、汽车效率低下、运营成本高等相关问题，制约着矿山企业的发展。为探讨某露天矿汽车转汽车—胶带排岩运输系统最佳时空衔接，结合国内某大型露天矿排岩运输系统的现状，根据矿山企业已经编制好的排岩进度计划，建立2种运输系统年排岩运营成本模型，借鉴类似矿山胶带运输系统的排岩成本，算出2种排岩运输系统的排岩成本，然后利用有无项目对比的方法，建立增量投资盈利指标数学模型，分别求出每种情况的增量投资盈利指标，将所得数据列于同一表格并通过对比找出增量投资盈利指标最大值，该最大值点就是所求的汽车转汽车—胶带排岩运输系统最佳时空衔接点。     

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