盘式裸磁铁矿物回收机在阳山铁矿的应用实践

近几年，阳山铁矿尾矿中磁性铁品位由1．5％上升到2．04％，铁金属流失增加，采用盘式裸磁铁矿物回收机，从尾矿浆中回收磁性铁可获得品位22．16％的粉精矿，经再磨再选获得铁品位65％的精矿，创效益135．2万元。     

磁黄铁矿精矿的热磁选矿

本文对由磁黄铁矿、煤和含铁组份组成的配料进行了热处理选矿工艺研究。试验结果表明，在焙烧温度900℃，焙烧时间30min，磁黄铁矿精矿与磁铁矿精矿之比2：1时，得到含有Ni6．18％、Cu 0．67％、Co 0．288％、Fe 71．4％和S 9．9％的磁性产品，进入磁性产品的回收率分别为Ni 85．1％、Cu 16．6％、Co 82．6％和Fe 33．4％，磁性产品的产率为23．9％。     

低品位磁铁矿石选铁除硫试验研究

某低品位磁铁矿石中磁性铁品位21．85％,S含量2．68％,其中磁黄铁矿中硫占原矿总硫的51．12％。试验研究采用联合流程：磁-浮工艺获得TFe品位64．10％、磁性铁回收率79．50％、含S0．45％的铁精矿;磁-浮-化学处理流程获TFe品位64．23％、含硫0．046％、磁性铁回收率78．67％的优质铁精矿。     

重介选煤用磁铁矿粉的特性与评价指标研究

介绍了影响介质消耗的主要因素有：磁铁矿粉质量，产品带介量，磁选机回收效率等，其中磁铁矿粉质量是最主要的影响因素。通过对西曲选煤厂使用过的多家磁铁矿粉进行研究，分析不同质量磁铁矿粉在不同磁场强度下磁性物含量的变化，以及温度对磁铁矿粉的磁性物含量的变化的影响，结合生产中的消耗情况。找出满足生产需要的磁铁矿粉的主要指标。     

高品位铁精矿的应用现状及前景展望

高品位铁精矿是选矿的深加工产品,又是一种很有发展潜力的新型功能材料。目前高品位铁精矿主要分为两类：其一是指铁品位高于69．00％、二氧化硅及其它杂质含量小于3．00％的磁铁矿精矿,主要用于生产海绵铁;其二是指铁品位高于71．50％、二氧化硅及其它杂质（酸不溶物）含量小于0．2％～0.3％的磁铁矿精矿,主要用于粉末冶金、磁性材料等领域。介绍了高品位铁精矿用于生产海绵铁和粉末冶金的现状及前景展望。     

里海西南海岸钛磁铁矿砂的磁性精矿中铬的分布

在含Cr_2O_3 0.79、V_2O_6 0.45、TiO_2 3.51和Fe21％的钛磁铁矿砂的磁选过程中,研究了铬的分布。在磁性、弱磁性和非磁性产品中,铬的回收率分别为40.3、32.2和27.5％。磁性的钛磁铁矿精矿中,含Fe54.1、TiO_2 11.4、V_2O_5 0.85和Cr_2O_2 1.3%。     

浅谈共生矿物对磁铁矿粉质量的影响

分析了磁铁矿中共生矿物对磁铁矿粉质量的影响，对磁铁矿粉磁性物含量的测试方法提出了一些尝试性改进。     

近北庄磁铁矿的矿物特征

采用X射线衍射、X射线荧光光谱、电感耦合等离子质谱以及显微硬度等方法表征河北近北庄铁矿磁铁矿的矿物组成、化学成分和显微硬度。结果表明，磁铁矿为沉积变质型，主要物相为磁铁矿、石英、假象赤铁矿、褐铁矿、磁黄铁矿、铬铁矿等。Fe2O3和FeO音量范围分别为62．26％～70．34％和33．13％～26．57％，均值分别为65．21％和30．6％，其中Fe2O3与FeO总和均大于95％。其他主要成分CaO，SiO2，A12O3，K2O，P2O5，MgO和TiO2的平均含量分别为2．28％，1．77％．0．51％，0．51％。0．45％，0．20％和0．12％。磁铁矿的显微硬度变化范围为515-550kg／mm^2．平均528kg／mm^2。     

铁矿石磁浮选新技术

磁浮选是最近发展起来的一种选矿方法，目的是在分选过程中同时利用矿物的磁性和可浮性．采用这种方法，磁性矿物不会进入泡沫产品，而非磁性矿物则被浮起。对于某些矿石，使用该技术可减少甚至完全取消常规磁浮联合流程中的精选及扫选作业。本文介绍了该技术用于加拿大磁铁矿矿石的试验结果。试样全铁含量为32．89％，磁铁矿占87．60％。经一段磁浮选，可得到含铁69．10％的铁精矿，总回收率为84．84％，磁性铁的回收率为96．39％，而用常规的磁浮选联合流程，至少需要4段选别才能得到近似指标。     

高硅磁铁矿可选性预测模型研究

我国的铁矿资源较为丰富，但品位低，成分复杂，对外依存度很高。近年来，随着世界范围内优质低硅铁矿资源日渐枯竭，进口铁矿石价格不断上涨。为满足国内钢铁生产需要，使用储量丰富、价格低廉的高硅铁精矿作为钢铁生产的铁源具有极其重要的战略意义。基于对某厂高硅铁精矿的工艺矿物学研究发现，Fe、Si元素在不同粒级的分布规律有所差异，+20μm粒级中SiO2的分布率高的矿样选矿指标低，-20μm的粒级中TFe品位高的矿样磁选后精矿品位更高，并呈现线性相关关系，利用统计技术建立TFe和SiO2含量与不同粒度Fe、Si分布率的数学模型 ，通过回归分析、显著性检验确定铁精矿品位、SiO2含量与Fe、Si分布率的相关关系式，对指导选矿、球团生产具有重要意义。     

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。