湖北某地高硫铝土矿浮选脱硫试验研究

针对湖北某地典型的高硫铝土矿进行了浮选脱硫试验研究, 采用单因素试验方案, 重点考察了磨矿细度、矿浆pH值、捕收剂用量、抑制剂用量、活化剂用量及起泡剂用量对浮选脱硫的影响, 得到了浮选脱硫的最佳条件。在最佳条件下, 采用两粗两精两扫工艺流程可将原矿中的硫含量由3.56%降到0.25%, 达到了氧化铝工业生产要求;同时获得了S品位24.05%、产率10.94%的合格硫精矿。     

贵州某高硫铝土矿反浮选脱硫试验

贵州某高硫铝土矿Al2O3含量为62.60%、硫含量为7.15%,铝硅比为11.54,矿石有用矿物主要为一水硬铝石,属于典型的高品位一水硬铝石型高硫铝土矿。为给该矿石合理开发利用流程确定提供依据,采用反浮选脱硫工艺进行试验。结果表明,在磨矿细度为-0.074 mm占85%条件下,以碳酸钠为矿浆p H调整剂,硫酸铜为活化剂,改性淀粉为抑制剂,丁基黄药为捕收剂,松醇油为起泡剂,经1粗1精2扫、精选尾矿和扫选精矿均返回至粗选闭路流程浮选试验,获得了氧化铝含量72.06%、含硫量0.27%的精矿产品,试验结果可以为该铝土矿的资源开发提供参考。     

重庆某铝土矿反浮选脱硫脱硅工艺技术研究

对重庆某高硫高硅铝土矿进行了浮选试验研究。采用混合加药的方法,使用一粗两扫反浮选工艺流程,在磨矿细度-0.075 mm粒级占77.46%、矿浆pH值 8.0、浮选矿浆浓度25%条件下,以水玻璃为抑制剂、季铵盐和丁基黄药为组合捕收剂、松醇油为起泡剂,可得到精矿氧化铝品位62.18%、硫含量0.11%、氧化铝回收率79.67%的优良指标。     

低品位高硫铝土矿浮选脱硫磨矿工艺研究

针对典型的低品位高硫铝土矿,通过实验室磨矿试验、粒度分析、工业试验深入考察了低品位高硫铝土矿浮选脱硫磨矿工艺。研究表明,低品位高硫铝土矿矿石较普通低品位铝土矿粒度大,可磨性差;工业试验采用两段磨矿工艺较一段磨矿工艺对矿石过磨严重,对浮选脱硫存在一定影响;采用一段磨矿工艺在原矿硫含量为1.92%条件下,获得了精矿中硫含量0.19%,硫脱除率达到90.92%的良好指标,达到了氧化铝生产对硫含量的要求,为低品位高硫铝土矿浮选脱硫工业生产提供了参考依据。     

贵州某高硫高硅铝土矿浮选脱硫脱硅试验

我国高品位铝土矿日渐枯竭,为了更好地开发利用贵州某高硫高硅一水硬铝石型铝土矿,以满足国民经济建设的需要,采用浮选工艺进行了脱硫脱硅试验。在最佳工艺条件下,原矿经过1粗1精1扫反浮选脱硫,脱硫尾矿再经过2粗1精正浮选脱硅流程处理,可获得硫品位为31.62%、硫回收率为82.11%的硫精矿和Al2O3品位为65.55%、含硫为0.45%、铝硅比为9.44、Al2O3回收率为80.03%的铝土矿精矿,铝土矿精矿符合拜耳法溶出要求。     

贵州某低品位含硫铝土矿石选矿试验

贵州某低品位含硫铝土矿Al2O3含量为54.71%,SiO2含量为11.35%,铝硅比仅为4.82,且矿石中含硫1.33%。矿石主要含铝矿物为一水硬铝石,主要含硫矿物为黄铁矿。矿石中有用矿物嵌布粒度较细,脱硫时易产生夹带,因而较难实现有效分选。为高效开发利用该矿石资源,对有代表性矿石进行了脱硫脱硅浮选闭路试验。结果表明:在磨矿细度为-0.074mm占90%时,采用1粗3精1扫脱硫浮选、扫选尾矿经2粗4精1扫脱硅、脱硫精扫选尾矿经2粗1精1扫脱硅闭路流程处理该矿石,获得了硫品位为33.72%、Al2O3品位为15.96%、SiO2品位为4.98%、硫回收率为75.16%的硫精矿,Al2O3品位为61.13%、SiO2品位为7.39%、铝硅比为8.27、Al2O3回收率为79.64%的铝土矿精矿。1次磨矿脱硫脱硅浮选,脱硫精扫选尾矿单独脱硅浮选工艺是该矿石处理的高效工艺,对含硫含硅铝土矿石的分选具有借鉴意义。     

高硫铝土矿中硫的脱除研究现状

铝土矿中的硫是影响氧化铝生产中的重要杂质之一,硫的含量直接影响到氧化铝生产的指标。高硫铝土矿的矿石性质和赋存状态研究表明,硫主要是以黄铁矿的形式赋存在矿物中,硫在氧化铝生产过程中的危害及近年来研究的几种脱硫工艺,其中有浮选法脱硫、生产氧化铝湿法脱硫、焙烧预处理脱硫以及添加还原剂烧结法脱硫等几种脱硫技术,对不同脱硫工艺的效果分别进行了评述,并指出目前工业生产中选用浮选工艺除硫是很好的选择。研究低污染、低成本而又高效的除硫工艺,已成为选矿工作者的重点之一。     

重庆某高硫铝土矿浮选脱硫试验研究

为开发重庆某高硫铝土矿资源,对试验矿样进行了工艺矿物学研究和选矿试验研究。试验考察了pH值调整剂的种类和用量、磨矿细度、活化剂用量等因素对浮选指标的影响,得到最佳实验条件;闭路试验结果表明,在碱性条件下,采用一次粗选、三次扫选和四次精选流程,铝精矿中含硫可降至0.42%,Al_2O_3的回收率为97.60%;硫精矿中S品位为28.80%,S回收率为61.25%。     

西北某高硫铝土矿浮选脱硫试验研究

本文针对西北某高硫细粒级嵌布铝土矿,进行了浮选脱硫试验,试验研究结果表明,原矿磨至-200目90%,pH值为8.4,捕收剂丁基黄药和Z-200用量分别为200g/t和50g/t的条件下,矿经一粗两精两扫流程闭路浮选,可获得硫含量0.38%的铝土矿精矿,脱硫率为95.01%,铝土矿回收率为91.06%的选矿指标。浮选脱硫工艺后获得的含硫0.38%的铝土矿精矿,满足氧化铝拜耳法含硫不高于0.4%的要求,同时硫精矿可作为生产硫酸的原材料,整个浮选脱硫工艺尾矿零排放,实现了矿产资源的高效综合利用。      

低品位高铁铝土矿浮选脱硅试验研究

低品位高铁铝土矿矿石硬度较高而易过磨,造成浮选指标恶化。通过QEMSCAN分析磨矿产物各粒级组成,发现磨矿产品粗、细粒级两级分化严重且大部分三水铝石矿物在细粒级矿样中富集。考查了磨矿细度、抑制剂添加量、高分子调整剂添加量、捕收剂用量与浮选矿浆浓度等单因素对浮选的影响并确定最优浮选条件。在最优浮选条件下进行闭路试验,取得了精矿氧化铝含量54.47%、铝硅比7.02、氧化铝回收率75.96%的良好浮选指标。     

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。