国内外铁矿石脱泥预选设备的发展状况

铁矿石脱泥预选设备是在重力场、介质阻力场、磁力场等复合力场作用下利用入选铁矿石中各矿物之间的物理性质的差异，对目的矿物进行脱泥预选的分选设备。本文简要介绍国内外常用的铁矿石脱泥设备的发展状况。     

复合力场铁矿石脱泥设备的设计与研究

借鉴目前国内铁矿石脱泥设备的结构特点，设计了2种溶剂相同、结构不同的复合力场脱泥设备——长柱型复合力场脱泥设备及圆锥型复合力场脱泥设备，并进行了磷铁矿的脱泥实验。结果表明：圆锥型复合力场脱泥设备的脱泥效果明显优于长柱型复合力场脱泥设备。     

新型外磁式磁选机对复合铁矿石的粗粒预选

实现复合铁矿石的高效预选,提高入磨品位,简化磨选工艺流程,减少磨选作业处理量,降低生产成本的关键是分选设备。北京矿冶研究总院开发出了适合复合铁矿石预选的NLCT系列外磁式磁选机,该类型设备采用外置弧形磁路设计,分选筒内轴向分选,可实现强磁性矿物和弱磁性矿物的高效富集。采用NLCT0607型外磁式磁选机对粒度为12～0 mm,Fe品位为26.49%的安徽霍邱地区某低品位磁铁矿-镜铁矿混合铁矿石进行预选,抛尾产率达20.90%,精矿Fe回收率达92.35%。对粒度为10～0 mm,Fe品位为20.30%,TiO₂品位为7.88%的攀西红格矿区某钒钛磁铁矿石的预选试验,抛尾产率达25.92%,精矿Fe、TiO₂回收率分别达89.52%和91.01%;该系列设备的现场工业应用取得了与实验室非常接近的生产指标。因此,NLCT系列外磁式磁选机在复合铁矿石的高效分选方面具有广阔的应用前景。     

浮选尾矿预选钨矿的适宜脱泥率和重选产品的合理截取

从硫化矿浮选尾矿中回收钨矿物前，采用螺旋溜槽预选比较经济，螺旋溜槽给矿宜先用水力旋流器脱泥并掌握适宜脱泥率，旋流器沉砂筛除一部分粗粒后也有利于溜槽矿物分带。     

我国贫铁矿石磁选预选现状及发展趋势

介绍了磁选预选技术在贫铁矿石选矿中的应用情况。以高效圆锥破碎机、自磨/半自磨机和高压辊磨机为代表的新型碎磨设备使贫铁矿石的预选粒度有效降低,为预选抛尾提供了有利条件。磁选技术既可以实现贫磁铁矿石粗碎产品（约350~400 mm）的预选抛尾,也可以实现超细碎产品（小于3 mm）的预选抛尾,并可根据矿石性质及现场生产实际采用干式或湿式预选工艺。永磁辊式强磁选机可对中碎或细碎后的弱磁性贫赤铁矿石进行预选,电磁立环脉动高梯度磁选机对细粒级（小于3 mm）贫赤铁矿石的预选效果较好。指出了未来贫铁矿石磁选预选的主要发展趋势为高效碎磨设备和工艺的基础性研究,磁选设备对贫铁矿石性质和生产工艺适应性的研究,弱磁性贫赤铁矿石永磁强磁预选技术的深入研究与推广应用。     

我国典型贫铁矿石预选技术研究新进展

介绍了我国铁矿资源的分布及特点,分析了我国典型贫铁矿石预选技术的研究进展,重点评述了超贫磁铁矿、微细粒嵌布磁铁矿、钒钛磁铁矿以及弱磁性赤褐铁矿的预选新工艺和新技术。高压辊磨超细碎逐渐成为贫铁矿石加工的常规工艺之一;综合运用复合力场的新型干式磁选机能够提高细粒级贫磁铁矿预选的精矿品位和抛尾产率;基于半闭合磁系的外磁式预选设备为钒钛磁铁矿石的预选提供了新的途径;粗粒干式和细粒湿式高梯度联合磁选预选能够充分改善赤铁矿的预选效果;智能光电预选技术能够从较粗粒级(+12 mm)的褐铁矿、镜铁矿等弱磁性难选铁矿石中抛出产率7.30%～17.28%的合格尾矿。指出了未来贫铁矿资源开发利用的趋势为超细碎设备、新型复合力场高效磁选预选设备和智能光电预选设备的创新研究。     

新型外磁式磁选技术应于用复合铁矿预选试验研究

复合铁矿往往含有强磁性和弱磁性矿物,采用预选抛废工艺,通过常规筒式磁选机往往不能达到比较理想的选别指标,而且存在工艺及设备运行复杂等难题.为了提高复合铁矿石的高效预选作业效率,尽量提高矿石的入磨品位,简化磨选工艺流程,减少磨选作业处理量,降低设备的生产成本,采用一种新型的磁选技术,使用单台设备便可实现不同种类矿石的梯级...     

铁矿石预选工艺及设备发展前景

介绍了磁铁矿预选的重要性和必要性,详细分析了大块预选工艺、粗粒预选工艺、细粒预选工艺及红矿预选工艺及相关设备情况,并提出了一种新的破碎—预选工艺。分析认为:采用合理的预选工艺和生产设备是矿山节能降耗、降低生产成本的主要途径;同时针对铁矿石预选工艺及设备存在的问题和不足,提出了未来发展建议。     

东鞍山难选矿石工艺矿物学研究

介绍了东鞍山难选矿石含铁绿泥假象赤铁矿石、高亚铁矿石、半氧化矿石和含碳酸盐假象赤铁矿石的矿物组成,并分别分析了其镶嵌特征,对含铁绿泥假象赤铁矿石、高亚铁矿石和半氧化矿石3种难选矿石中矿物的含量、粒度特征进行了研究,对东鞍山铁矿石铁矿物粒度变化趋势进行了分析,并提出从选矿上改进难选矿石选别指标的建议。     

YCG粗粒永磁辊式强磁选机在磁选试验中的应用

对赤铁矿、菱铁矿、褐铁矿及其混合矿等弱磁性矿石的粗粒预选抛尾,一般采用重选或电磁强磁选工艺,但指标控制难、耗水量大、分选效率低或仅限于细粒级矿物的湿式选别,成本高、维护繁琐。介绍了YCG系列永磁辊式强磁选机的结构和分选原理,总结了磁辊大型化、磁路设计、皮带选用、易损件设计等技术创新改造,着重归纳了该系列设备在南非铬矿石磁选、尼日利亚氧化锰矿石干式磁选、司家营弱磁性堆积矿样磁选、安徽金日盛铁矿石粗粒抛尾、马钢和睦山和庐江龙桥铁矿石干式预选抛废、霍邱镜铁矿石和宜昌鮞状赤铁矿石磁选等试验中的应用情况。YCG系列永磁辊式强磁选机对于改善弱磁性矿石粗粒预选抛尾效果具有显著作用。     

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