ZMC捕收剂在铝土矿正浮选中的应用*

本文研究了新型捕收剂ZMC在铝土矿正浮选中的应用。采用ZMC捕收剂,针对不同品级的铝土矿,采用一粗两扫两精的浮选技术工艺,正浮选闭路试验取得了优异的工艺指标。针对铝硅比为4.5的铝土矿,获得了铝硅比7.04,氧化铝回收率92.16%的精矿;针对铝硅比为3的铝土矿,获得了铝硅比7.72,氧化铝回收率70.56%的精矿。     

高硅铝土矿正浮选两段脱硅试验研究

本文以云南鲁甸高硅低铝硅比型铝土矿为研究对象,通过正浮选阶段磨矿阶段选别、两段脱硅工艺流程获得了较好的铝土矿精矿,浮选指标良好。原矿含Al2O360.78%、Si O220.84%,铝硅比(A/S)为2.92,主要脉石矿物为白云母、石英等。通过在粗磨条件下进行一段浮选脱硅,粗精矿再磨再选后进行二段浮选脱硅,产出合格精矿。粗精矿再磨后进行五次精选,闭路试验获得精矿产率为64.74%、Al2O370.83%,Si O28.40%、A/S为8.43、Al2O3回收率为75.83%的良好指标。     

广西某高硫铝土矿反浮选脱硫-聚团浮选脱硅试验

针对我国高硫铝土矿难以利用的现状,以广西某高硫铝土矿为研究对象,采用反浮选脱硫-聚团浮选脱硅原则流程和新型高效铝土矿浮选捕收剂ZY-01进行了选矿试验。确定的选矿工艺流程为1粗1扫1精反浮选脱硫-1粗2扫2精聚团浮铝降硅;采用该流程获得的铝土矿精矿Al₂O₃品位为63.31%、回收率为78.52%、铝硅比为7.38,硫精矿S品位为16.78%、回收率为80.72%。铝土矿精矿指标满足氧化铝生产要求。     

充填介质对柱选铝土矿浮选行为的影响研究

以河南某铝硅比为1.92的铝土矿为研究对象, 利用添加自主设计的“十字型”充填介质的实验室型逆流浮选柱, 考察了不同规格充填介质对铝土矿浮选精矿指标和粒度分布的影响, 并且探究了浮选过程中充填介质对矿物颗粒在浮选柱内部轴向分布的影响规律。研究结果表明, 通过在传统逆流浮选柱内部添加“十字型”充填介质, 使柱内流态向“柱塞流”发展, 强化浮选柱轴向粒度分布差异性, 有利于10~38 μm微细粒级矿物回收, 提高铝土矿浮选指标。充填介质高度60 mm时浮选柱浮选效果较为优异, 经过一段开路浮选作业, 可获得Al₂O₃品位59.29%、铝硅比11.83的铝土矿精矿, 较无充填条件下铝硅比提升较大。     

西南地区某高泥堆积型铝土矿选矿试验研究

西南地区某高泥堆积型铝土矿中Al₂O₃、SiO₂含量分别为47.25%、10.86%,铝硅比为4.35;主要目的矿物为硬水铝石,主要脉石矿物为高岭石,其他金属矿物有赤铁矿、针铁矿以及锐钛矿等。矿石中矿物的共生关系较为复杂,目的矿物嵌布粒度不均,单体解离度不高;铁、钛矿物与铝矿物之间紧密共生,难于实现有效分离。针对该矿石采用全泥正浮选的选矿工艺,以氢氧化钠为调整剂、水玻璃为抑制剂,EMB-506为捕收剂,在磨矿细度为-0.074mm占70%的条件下,闭路试验可获得Al₂O₃品位为51.62%,SiO₂品位为6.05%,铝硅比为8.53,Al₂O₃回收率为86.66%的浮选精矿。该工艺流程结构及浮选药剂制度简单,所得浮选精矿达到了拜耳法生产氧化铝对给料的要求。     

低铝硅比堆积型细泥铝土矿活化浮选脱硅研究

研究了低铝硅比堆积型细泥铝土矿的浮选脱硅, 结果表明: 堆积型铝土矿矿泥量大, 传统处理沉积型铝土矿的药剂制度对低铝硅比堆积型铝土矿分选效果不佳。采用新型活化剂TK, 大幅提高了铝矿物回收率, 成功实现了低铝硅比堆积型铝土矿的浮选脱硅。对于铝硅比为3.23的云南某堆积型铝土矿, 经浮选脱硅, 可以得到铝硅比为9.24、Al₂O₃回收率为69.91%的精矿。     

旋流-静态微泡浮选柱分选铝土矿的半工业试验

在实验室试验的基础上,采用旋流-静态微泡浮选柱对河南某铝土矿选厂的浮选机入选物料进行了现场分流半工业试验。试验结果表明：旋流-静态微泡浮选柱经一粗一精2段浮选,可获得产率为71.1%,铝硅比为10.68,Al₂O₃回收率为79.9%的铝土矿精矿,与现场浮选机一粗二精一扫一精扫5段浮选的生产指标相比,精矿铝硅比基本相同,精矿产率高4.1个百分点,精矿Al₂O₃回收率高3.2个百分点。     

山东低铝硅比铝土矿降铁脱硅试验研究

以山东某低铝硅比铝土矿为研究对象,为了实现其降铁、降硅的目的,采用磁选和浮选联合工艺流程,获得较好的工艺指标。原矿铝硅比3.18,在磨矿细度-0.074mm 94.55%的条件下,采用"弱磁-强磁-浮选"工艺流程,弱磁场强度1.2×105 A/m,强磁场强度9.6×105 A/m,以碳酸钠为调整剂,用量3 500g/t,六偏磷酸钠为抑制剂,用量40g/t,油酸钠为捕收剂,用量1 200g/t,最终获得精矿产品铝硅比为9.04,铝品位为62.47%,回收率为62.74%。     

广西某高硅铝土矿尾砂分选试验研究

广西某高硅铝土矿为实现其尾砂中含铝矿物的回收利用,进行了选矿工艺试验研究。试验结果表明：在磨矿细度为-0.074 mm75%时,经1次重选,重选中矿、尾矿合并后进行1粗1扫3精1精扫、中矿顺序返回的闭路正浮选脱硅流程,获得了Al₂O₃品位65.80%、铝硅比7.95、Al₂O₃综合回收率68.98%的铝土矿精矿,重选—浮选联合工艺流程的提铝脱硅效果显著,可为类似低铝高硅型铝土矿资源的开发利用提供技术支撑。     

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。     

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。