河南某铝土矿中锂的浮选回收与提取试验

河南省某地铝土矿矿石中Li2O品位为026%,锂主要赋存在高岭石、伊利石等黏土矿物中。为确定铝土矿伴生锂的开发利用工艺,进行了铝土矿浮选工艺试验和富锂精矿的提取试验研究。试验结果表明：采用2粗1精、中矿顺序返回的铝土矿浮选闭路流程,可获得Al2O3品位6172%,铝硅比为1145的铝土矿精矿产品和Li2O品位057%、回收率为7897%的富锂精矿;富锂精矿与浓硫酸熟化液（固液比）1∶1混合后,在熟化温度180 ℃、浸出液固比2∶1～3∶1、浸出时间10 min、浸出温度常温的情况下,Li2O浸出率达到9464%,最终得到纯度为9956%的碳酸锂产品。采用硫酸熟化—浸出—净化—提锂工艺可实现河南某地铝土矿中锂高回收率和获得高纯度产品的目的,具有一定的实际价值。     

酒钢粉矿强磁工艺优化试验研究

针对酒钢0～15 mm粉矿生产中存在的精矿铁品位低、金属回收率低的问题，进行了预选抛尾、改善磨选流程以及尾矿选择性絮凝磁种磁化强化回收试验研究。结果表明，预选抛尾能有效抛除影响选别指标的围岩、脉石从而提高磨选原矿品位；粗选精矿塔磨处理能减少过磨现象，在精矿品位相近的情况下，回收率提高了5.32个百分点；磁选尾矿选择性絮凝磁种磁化处理能进一步提高金属回收率并降低尾矿铁品位。全流程最终可获得精矿TFe品位48.29%、回收率82.90%的指标。扫描电镜和红外光谱表征结果表明，苛性淀粉能在目的矿物与磁种间建立架桥，苛性淀粉与目的矿物之间的吸附主要为化学吸附和氢键，这使得磁性絮团中脉石矿物夹杂减少，能在保证精矿铁品位的同时大幅提高铁回收率。     

干扰床分选机分选低品位铝土矿的可行性研究

以河南某铝硅比约为3的低品位铝土矿为研究对象,探究干扰床分选机对其分选的可行性。通过破碎筛分以及浮沉试验确定了干扰床分选机较佳的入料粒度上限为0.90 mm,探索了干扰床分选机中上升水流大小与精矿铝硅比的关系,当上升水流为0.91 m3/h时,可以得到铝硅比为7.69、产率为26.13%的合格精矿。研究结果表明,干扰床分选机对低品位铝土矿的分选具有一定的效果,该研究对我国铝土矿的开发与应用具有一定的指导意义。     

铝土矿正浮选精矿过滤助滤剂的研究及应用

实验室研究了铝土矿正浮选精矿过滤的助滤剂,工业应用证明有效地解决了由于铝土矿品位的下降,铝土矿正浮选精矿过滤困难,过滤设备产能低下的难题.     

贵州某铝土矿选矿试验

贵州省某沉积型低品位铝土矿主要矿物为高岭石,Al2O3品位43.29%,铝硅比1.02,硫、铁、磷杂质含量很低。为回收利用其中的铝,进行选矿试验。结果表明,原矿磨矿至-0.15 mm93.00%后,+0.15 mm筛上产品可直接作为精矿,-0.15 mm筛下产品以碳酸钠为p H调整剂、硅酸钠为抑制剂、六偏磷酸钠为矿泥分散剂、自制的CDK-1为捕收剂进行1粗1扫浮选,粗、扫选精矿合并进行2次精选,精选精矿与+0.15 mm筛上精矿作为综合铝精矿。最终闭路试验获得综合铝精矿铝硅比3.97,Al2O3品位64.21%、回收率62.22%的良好指标,可作为合理开发利用国内沉积型低品位铝土矿的技术参考。     

某低品位红土型铝土矿脱硅提纯选矿试验研究

针对国外某低品位红土型铝土矿进行脱硅提纯选矿试验研究,小型闭路试验研究结果表明,在给矿三水铝石品位52.10%、有效铝硅比3.14、高岭石品位23.3%的条件下,原矿经选择性磨矿-分级,获得了Al2O3品位65.90%、有效铝硅比14.38,有效铝回收率40.12%的+0.15 mm粗粒级精矿;-0.15 mm的筛下产品进入正浮选脱硅作业,以碳酸钠为p H值调整剂、水玻璃为抑制剂、油酸为捕收剂,经1次粗选1次扫选2次精选,中矿顺序返回,可获得Al2O3品位70.90%、有效铝硅比8.36、有效铝回收率为52.29%的浮选精矿;最终综合精矿三水铝石品位68.64%、高岭石含量9.82%,有效铝回收率为92.40%、有效铝硅比11.07,+0.15 mm产品占45.21%,很好地实现了该低品位红土型铝土矿脱硅提纯。     

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。     

铝土矿湿法预处理的研究进展

对铝土矿湿法预处理工艺的产生和发展进行了简要的综述。对铝土矿进行湿法预处理, 可提高铝土矿的品位, 满足纯拜尔法生产氧化铝的需要。研究结果表明, 铝土矿的湿法预处理工艺具有全湿法、氧化铝回收率高、能耗与碱耗低等特点, 具有较好的应用前景。     

高铁铝土矿悬浮磁化焙烧铁铝分离技术研究

印尼某高铁铝土矿原矿铁品位为 14.06%,铁矿物主要以赤（褐）铁矿形式存在,采用悬浮磁化焙烧—磁 选技术处理高铁铝土矿,并开展了系统的高铁铝土矿悬浮磁化焙烧试验研究。结果表明,悬浮磁化焙烧最佳条件为给 料粒度-0.074 mm占50%、焙烧温度600 ℃、焙烧时间20 min、CO浓度为20%、总气体流量500 mL/min,在此最佳条件下 进行悬浮磁化焙烧试验,焙烧产品在磁场强度为133.6 kA/m的条件下进行弱磁选,最终可获得Al2O3含量68.55%、回收 率为74.43%、铁去除率为65.63%的铝精矿。悬浮磁化焙烧技术实现铁铝高效分离,降低了原矿中铁品位和水分,大幅 度提高了高铁铝土矿的Al2O3含量,达到了除铁提铝的技术目标。     

中州铝土矿浮选药剂的研究和优化

随着铝土矿矿石的日益贫化,铝土矿的物理化学性质也发生了改变,研究捕收剂与矿物的作用机理,对适合低品位铝土矿浮选的药剂生产工艺进行了改进。通过跟踪生产,实现了尾矿中Al2O3含量平均降低0.98%、A/S降低0.07、精矿指标基本不变、整体回收率提高了1.06%,说明改进后的浮选药剂适合低品位铝土矿浮选。     

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。