微细粒煤分选特性及其浮选技术进展

随着分选技术的进步和对微细粒分选研究的深入开展,开发出了以絮凝浮选,载体浮选,油团聚浮选,泡沫浮选为代表的行之有效的分选方法,有效的解决了微细粒难浮的问题,提高了煤炭企业的收益。     

浮选柱技术的研究现状及发展趋势

简要论述了国内外浮选柱技术的研究现状及发展趋势,指出浮选柱技术是进行微细物料分选的先进技术,主要表现为:①柱分选技术成为研究重点;②柱分选设备的研制成绩显著;③柱分选工艺取得重大突破;④浮选柱自动控制迈上新台阶;⑤柱分选技术应用领域不断拓展。     

飞灰残炭的浮选柱分离探索

采用新型的浮选柱分选除炭技术，通过不同条件下的浮选柱分选试验，测试了浮选柱分选参数对飞灰残炭回收率的影响，即残炭回收率受充气流量和捕收剂(轻柴油)用量的显著影响．在最佳的浮选柱分选条件下，残炭脱除率可达71．02％．     

一种新型的煤泥分选设备-浮选柱

介绍了煤泥分选回收新工艺三产品旋流器-浮选柱联合流程在中小型选煤厂的应用,分析了浮选柱的基本结构、工作原理和技术特点,提出在中小型选煤厂采用此工艺流程,可以简化煤泥分选回收工艺,提高细粒煤分选质量效率.     

油团聚分选研究进展

油团聚分选的基本原理在于团聚油优先润湿疏水性颗粒,作为增大表观粒度的方法之一,该法用于细粒物料的分选愈来愈受到重视.本文就油团聚分选技术在粗煤的脱灰脱硫、细粒金的浮选、尾矿中细粒辉钼矿的浮选、氧化矿的浮选、废纸的脱墨浮选、废水处理等领域的研究进展进行了综述.     

提高煤泥分选精度的工艺研究

通过对回坡底煤矿分选工艺进行优化,解决了原有分选工艺粗煤泥分选效果差、设备运行损耗严重、浮选药剂用量大等问题,实现了粗煤泥的有效回收,高频分选降低了分选成本,为矿井带来了可观的经济效益,提高了矿井精煤的产率.     

提高煤泥分选精度的工艺研究

通过对回坡底煤矿分选工艺进行优化,解决了原有分选工艺粗煤泥分选效果差、设备运行损耗严重、浮选药剂用量大等问题,实现了粗煤泥的有效回收,高频分选降低了分选成本,为矿井带来了可观的经济效益,提高了矿井精煤的产率.     

褐煤分选方法分析

面对日益严峻的能源形势,褐煤分选利用的新方法、新途径逐渐受到关注。文章介绍了褐煤分选中的粗加工、干法分选、正浮选、反浮选研究现状,并分析了褐煤分选前景。     

一种新型的煤泥分选设备——浮选柱

介绍了煤泥分选回收新工艺三产品旋流器－－浮选柱联合流程在中小型选煤厂的应用，分析了浮选柱的基本结构、工作原理和技术特点，提出在中小型选煤厂采用此工艺流程，可以简化煤泥分选回收工艺，提高细粒煤分选质量效率。     

磁铁矿分选设备研究现状与发展趋势

针对目前复杂难选磁铁矿资源开发利用现状,提出关键分选设备的研发与改进是铁矿选矿工艺发展重点之一。以主要分选作用力场结合方式对磁铁矿分选设备进行了分类,概述了磁选、重选、浮选等单力场分选设备及由以上经典分选力场复合而成的复合力场分选设备结构特点、分选原理及其现场应用情况。研究表明:重选能耗低,无污染,处理量大,但分选粒度较粗,分选效果偏低;浮选下限低,但药剂制度复杂,成本较高,且难以满足日益提高的环保要求;磁选对磁性矿物虽更具针对性,但磁性夹杂易导致磁精矿品位偏低。提出了复合力场分选设备作为一种高效节能的选矿设备,具有重选、浮选、磁选等多种选矿方法的优点,提高了设备分选效率、处理量、选择性以及对粒级的适应性等。展望了具有重-磁-浮多重功能的新型多力场复合分选设备将成为未来主要研究方向,替代现有复合力场选别设备成为必然趋势,具有广阔的研究与应用前景。     

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     

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。     

2014 second batch of rare earth quota released

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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