齐大山铁矿选矿分厂稳质降尾试验研究

主要对齐大山铁矿选矿分厂浮选尾矿品位升高原因进行分析,并对降低浮选尾矿品位、提高金属回收率进行试验研究。研究表明,强磁选精矿采用细筛-脱泥-重选流程既能稳定浮选质量,又能达到降低浮选尾矿品位。     

大红山铁矿400万t/a选矿厂降尾改造

大红山铁矿400万t/a选矿厂尾矿品位较高,降低尾矿铁品位有利于提高铁回收率。在对一段强磁选尾矿和二段强磁选尾矿性质研究的基础上,分别进行了回收工艺研究。研究表明,一、二段强磁尾矿分别采用1粗1精重选流程和1粗1精强磁选、强磁精选尾矿摇床再选流程处理,均能显著降低尾矿铁品位,从而提高精矿铁回收率。     

多极永磁磁选机的试验研究

分析了多极永磁磁选机特点,研究设计了新型多磁极永磁磁选机,对多极磁选机的磁场分布及对磁性物选别的影响进行了分析。多极磁选机对提高精矿品位,降低尾矿品位有很好的效果,工业试验结果表明,在回收率基本不变的情况下,精矿品位提高了1%～1.5%,尾矿品位降低了0.5%～1.5%。     

工艺矿物学在新疆某铜矿浮选尾矿降尾工艺试验中的应用研究

针对新疆某单一铜矿石选矿厂浮选尾矿铜品位(0.065％)较高的问题,对其浮选尾矿进行工艺矿物学研究,开展降尾工艺试验研究,最终采用浮选尾矿分级抛尾、粗粒级(+0.15 mm)尾矿再磨再选的浮选工艺流程,获得了精矿铜品位20.13％、铜回收率95.75％的铜精矿.尾矿铜品位可降至0.040％,比现场生产的铜品位降低了 0...     

某铁矿浮选尾矿再磨再选试验研究

某铁矿在强磁-浮选工艺中,浮选尾矿品位较高,接近原矿品位,造成金属量的流失,通过对该铁矿的浮选尾矿进行再磨再选试验,从而进一步降低浮选尾矿品位,提高铁精矿的回收率和产量。     

某赤铁矿选厂降低尾矿铁品位试验

通过对某赤铁矿选厂尾矿矿石性质的分析研究,提出了进一步降低尾矿铁品位的流程方案,即2次强磁扫选尾矿分级—粗粒级进入摇床、细粒级进入离心机—离心机精矿用皮带溜槽精选流程。试验获得了精矿铁品位为34.05%、产率为35.24%、回收率为66.36%、尾矿品位为9.52%的良好指标,并结合试验结果提出了降低尾矿品位增加精矿产量的现场改造方案。     

降低密地选厂尾矿铁品位的探索试验研究

摘要:攀钢密地选矿厂阶磨阶选流程改造后,产品的物料特性发生了变化,尾矿品位较改造前有所增加。选铁尾矿中品位TFe16.16%, TiO211.03%,尾矿中铁品位偏高,有必要进行降低尾矿中的铁品位的试验研究。研究结果表明,采用弱磁选可获得产率为5.02%,品位为TFe57.24%,回收率为17.78%的铁精矿;采用弱磁选—强磁选—浮选工艺流程,可获得产率为10.41%,TiO2品位为47.15%,回收率为44.49%的钛精矿。将所有尾矿混合,其混合尾矿降低至TFe11.42%, TiO25.97%,研究结果对密地选矿厂的流程改造有一定的参考作用。      

降低司家营铁矿中、强磁尾矿品位的流程改造

针对司家营铁矿中、强磁尾矿铁品位高,金属回收率低的情况,进行了改善中磁机和强磁机补加水水质、减少中磁机给矿量和降低中磁机给矿品位等3项改造。使司家营铁矿中、强磁尾矿品位由14.7%降低到11%,降尾效果良好。中、强磁尾矿品位的降低使司家营铁矿选厂综合尾矿品位由15.7%降低到13.5%,每年可多回收铁精粉18万t,经济效益可观。     

赤铁矿选矿工艺流程研究与探讨

针对研山铁矿赤铁矿选矿工艺流程暴露出的尾矿品位高、耗水量大等问题,经过对研山铁矿赤铁矿矿石性质、工艺流程设计和试生产现状的分析研究,同时组织了赤铁矿选矿工艺流程各工序工艺效果及选矿全流程的考察工作。根据考察分析结果,提出了将强磁选作业工艺位置进行调整,减少重选设备和浓缩设备的配置数量,合理控制磨矿粒度及强磁选的磁场强度,以及对尾矿进行再选降低尾矿品位的措施,实现了赤铁矿选矿工艺流程进一步优化,尾矿品位降低了2.49个百分点以上,提高了选矿技术经济指标和经济效益。     

氧化矿浮选尾矿再选试验

司家营铁矿北区分公司针对氧化矿选矿工艺在生产过程中存在尾矿品位偏高的问题,对浮选尾矿进行了再选研究。通过对浮选尾矿的性质分析和参考同行业尾矿再选试验成果,采用组合式强磁机磁选—磨矿—磁选—浮选流程,将浮选尾矿铁品位由23.21%降低至20.03%,同时产出了产率为7%、铁品位为65.46%的合格铁精矿,为企业流程优化提供了理论依据,且经济效益显著。     

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。