新疆某铅锌浮选尾矿选铁除硫分离工艺研究

为降低铁精矿中超标的硫,针对新疆某地高硫铅锌浮选尾矿弱磁选铁精矿铁、硫难以分离的问题,进行了铁精矿除硫试验研究。根据磁铁矿和磁黄铁矿的共生嵌布关系,含硫矿物赋存的状态及特性,采用磁—浮联合工艺流程对经磁选抛尾得到的粗精矿进行浮选,添加TZ-n+TZ-c组合调整剂,利用组合药剂的交互作用和协同效应,最终获得了硫含量0.14%、全铁品位65.42%、铁回收率78.85%的合格铁精矿。该工艺成功实现了铁、硫的有效分离,使铁精矿中的硫含量由5%以上降至0.15%以下,提高了铁精矿质量,降低药剂成本190万元/a,经济效益显著。     

钼尾矿综合回收硫铁试验研究

对河南某钼尾矿矿石性质进行研究,发现具有回收黄铁矿和磁铁矿的价值。在活化剂硫酸、捕收剂异丁基黄药、起泡剂2号油用量分别为200g/t、50g/t、35g/t的浮选药剂制度下,钼尾矿采用一粗一精一扫浮选闭路流程,可获得硫精矿品位41.21%,回收率87.68%的选别指标。选硫尾矿再通过一段磁选-再磨-二段磁选的工艺流程,获得铁精矿品位62.72%,全铁回收率41.86%的选别指标。     

某高硫铁精矿浮选降硫活化剂筛选试验

某铁选矿厂磁选铁精矿铁品位为66.76%,硫含量居高不下,达到0.82%。为降低铁精矿中硫含量,在捕收剂丁基黄药和起泡剂2#油用量分别为290,140 g/t时,采用1次粗选流程进行浮选降硫活化剂筛选条件试验。结果表明:1不使用活化剂时,仅能使浮选铁精矿硫含量降低至0.43%,指标不理想;2使用活化剂硫酸铜、硫酸、氟硅酸铵、碳酸钠均能使铁精矿硫含量降低至0.25%以下,但硫酸铜、氟硅酸铵价格昂贵,最终铁损失偏高,硫酸会恶化浮选作业环境,因此选择碳酸钠为浮选降硫活化剂;3在碳酸钠1 500 g/t时,采用2粗1精闭路浮选处理铁精矿试样,最终获得的浮选铁精矿铁品位为66.95%、含硫0.24%,尾矿硫品位为26.40%,硫脱除率达71.38%,铁损失仅1.94%的满意指标。试验结果可为该选厂高硫铁精矿降硫浮选药剂制度的确定提供借鉴。     

湖北某铁精矿浮选柱降硫试验

湖北某选矿厂铁精矿铁品位66.18%,含硫0.40%,铁主要以磁铁矿的形式存在,黄铁矿中的硫占总硫的75.00%。在磨矿细度-0.074 mm 71.90%、给矿浓度35%、捕收剂丁基黄药用量80 g/t、起泡剂2~#油用量50 g/t的条件下,经1次浮选柱闭路选别,铁精矿硫含量可降低至0.09%,铁精矿铁品位提高到67.35%、回收率93.28%,提高了铁精矿品质,可为磁铁精矿浮选柱降硫的工业化应用提供技术依据。     

澳大利亚Caim Hill磁铁矿选矿试验研究

针对澳大利亚Cairn Hill含铜、金的磁铁矿矿石,进行了先磁后浮及先浮后磁两大原则流程方案的选矿试验,并在先浮后磁的浮选方案中又进行了铜优先浮选流程和铜硫混合浮选两种流程方案试验。最终确定优先浮选铜、后浮选硫、尾矿弱磁选铁的先浮后磁联合工艺。小型闭路试验获得了铜品位21.15%、铜回收率88.94%、含金4.10g/t、金回收率49.50%的铜精矿和铁品位70.68%、铁回收率92.14%的铁精矿,以及硫品位40.58%、硫回收率57.80%的硫精矿。     

山西某磁选铁精矿浮选脱硫试验

山西某磁选铁精矿铁品位为65.16%，S含量高达2.62%，主要铁矿物为磁铁矿，占总铁的92.23%；含硫矿物主要为磁黄铁矿和黄铁矿，分别占总硫的53.72%和45.67%，硫在粗粒级（+100目）和细粒级（-325目）的含量相对较高，超过70%的硫分布在-200目粒级。为降低该铁精矿中的硫含量，进行了反浮选脱硫试验。结果表明，试样采用1粗1精-粗选与精选尾矿合并扫选，扫选精矿返回粗选的闭路浮选流程处理，在粗选+精选丁基黄药用量为400+100 g/t、H106用量为950+450 g/t、松醇油用量为50+20 g/t的情况下，可获得铁品位为66.59%、含硫0.29%、铁回收率为91.40%的铁精矿和硫品位为22.13%、含铁52.75%、硫回收率为90.07%的硫精矿。     

山西某磁选铁精矿浮选脱硫试验

山西某磁选铁精矿铁品位为65.16%，S含量高达2.62%，主要铁矿物为磁铁矿，占总铁的92.23%；含硫矿物主要为磁黄铁矿和黄铁矿，分别占总硫的53.72%和45.67%，硫在粗粒级（+100目）和细粒级（-325目）的含量相对较高，超过70%的硫分布在-200目粒级。为降低该铁精矿中的硫含量，进行了反浮选脱硫试验。结果表明，试样采用1粗1精-粗选与精选尾矿合并扫选，扫选精矿返回粗选的闭路浮选流程处理，在粗选+精选丁基黄药用量为400+100 g/t、H106用量为950+450 g/t、松醇油用量为50+20 g/t的情况下，可获得铁品位为66.59%、含硫0.29%、铁回收率为91.40%的铁精矿和硫品位为22.13%、含铁52.75%、硫回收率为90.07%的硫精矿。     

吉林某选厂铁精矿脱硫试验研究

随着中国经济的迅猛发展,铁矿石的需求量日益增加,对外依存度已超过75%。我国铁矿资源整体禀赋较差,生产的铁精矿中常伴有含硫矿物,在冶炼过程中会形成大量有害气体SO2,且影响钢铁产品的性能。因此采用选矿手段进行预先脱硫。试验所用矿样来自吉林某选厂的高硫铁精矿,Fe品位为66.19%,S品位为0.64%。含铁矿物主要为磁铁矿,少量为赤铁矿、磁黄铁矿和铁铝榴石,硫的主要载体为磁黄铁矿,脉石矿物主要为石英。试验采用磨矿后浮选和直接浮选两种工艺对其进行脱硫。利用条件试验和正交试验,确定磨矿后浮选工艺粗选最佳药剂制度为:硫酸800g/t、X-43200g/t、丁黄400g/t、松醇油30g/t。最终获得硫品位0.104%、铁品位66.86%的脱硫铁精矿。直接浮选采用一粗三扫浮选工艺,最终获得硫品位0.112%、铁品位67.04%的脱硫铁精矿。     

包头磁铁矿尾矿中硫、铁回收试验

包钢选矿厂为有效回收磁铁矿选铁尾矿中的硫、铁等有用矿物,在对矿样性质研究的基础上,确定采用磁选—浮选工艺流程。在较佳的选别条件和合理的药剂制度下,获得了硫品位为43.39%、硫回收率为41.54%的硫精矿,铁品位为63.93%、铁回收率为8.93%的铁精矿。在减轻尾矿排放压力的同时,创造出了巨大的经济效益和社会效益。     

赤城县石槽铜铁矿选矿试验研究

针对石槽钢铁矿矿石进行了原矿直接磁选、原矿先浮选—浮选尾矿磁选流程试验研究。通过试验,最终确定采用先浮后磁选矿工艺.先浮选回收铜,然后对浮选尾矿进行磁选选别铁,铜、铁粗精矿分别再磨精选的工艺流程。小型闭路试验获得了铜品位21.05%、铜回收率76.04%、含金1.78g/t、金回收率41.83%、银278g/t、银回收率39.62%的铜精矿和铁品位63.17%、铁回收率75.58%的铁精矿.有价元素得到综合回收。     

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     

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     

2014 second batch of rare earth quota released

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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