东鞍山高碳酸盐铁矿石磁选精矿浮选工艺研究

东鞍山铁矿高碳酸盐矿石中的菱铁矿常使东鞍山烧结厂的反浮选工序“精尾不分”,导致这些高碳酸盐矿石不能入选。为此,采用纯矿物配成的人工混合矿研究了菱铁矿对假象赤铁矿与石英常规反浮选的影响,并进行了人工混合矿及东鞍山高碳酸盐赤铁矿石磁选混合精矿的分步浮选试验。其中磁选混合精矿的分步浮选闭路试验在第1步正浮选时预先除去了占总量9.13%的菱铁矿,使第2步反浮选获得了铁精矿品位为66.34%、回收率为71.60%的良好分选指标,从而证明分步浮选是东鞍山高碳酸盐铁矿石的有效浮选工艺。     

新疆某白钨矿石选矿试验

新疆某白钨矿石中的有价元素为钨,钨主要以白钨矿的形式存在,主要脉石矿物为石英及萤石等含钙脉石矿物。为了确定该矿石的合理选矿工艺,分别就磨矿细度、常温浮选药剂用量、加温浮选药剂用量及选别工艺流程进行了试验。结果表明,矿石在磨矿细度为-0.074 mm占68.01%的情况下,以Na_2CO_3为pH调整剂,Na_2SiO_3为抑制剂,ZL为捕收剂,采用1粗2精1扫流程进行常温浮选;以Na_2CO_3和NaOH为pH调整剂,以Na_2S和Na_2SiO_3为抑制剂,ZL为捕收剂,在90~95℃保温50 min的情况下采用1粗2精1扫流程进行加温浮选,最终获得了WO_3品位为68.58%、WO_3回收率为84.59%的白钨精矿。     

低品位锡细泥选择性絮凝浮选试验研究

试验矿样中矿泥含量高,矿物种类繁多,有用矿物锡石品位低,仅为0.40%,嵌布粒度微细,可浮性与锡石相近的方解石类碳酸盐矿物含量高,导致该锡细泥回收难度大,本试验研究了选择性分散-絮凝对锡细泥浮选回收的影响。锡细泥在矿浆pH值为6.5的环境下,添加分散剂水玻璃+CMC、絮凝剂APAM进行预处理,实现微细矿粒选择性分散-絮凝,之后采用组合捕收剂BY-9+P86,经过"一粗二精一扫"闭路浮选流程可得到品位10.34%、回收率80.83%的锡精矿。     

东鞍山含碳酸盐磁选混合精矿分步与分散浮选协同工艺研究

东鞍山磁选混合精矿主要有用矿物为赤铁矿以及少量的菱铁矿和磁铁矿,脉石矿物主要为石英,铁矿物多呈细颗粒存在,铁在-37 μm粒级分布率达到82.55%。为实现东鞍山含碳酸盐磁选混合精矿中铁矿物的有效分选,采用分步与分散协同浮选工艺进行试验。结果表明：以柠檬酸为分散剂、淀粉为抑制剂、KS-Ⅲ为捕收剂经菱铁矿1次正浮选,正浮选尾矿以NaOH为pH调整剂、淀粉为抑制剂、CaO为活化剂、KS-Ⅲ为捕收剂经1粗1精2扫赤铁矿反浮选闭路试验,获得了铁品位为67.89%、回收率为69.35%的铁精矿。分步与分散协同浮选通过将分步浮选工艺和分散浮选技术结合起来形成协同作用而对含碳酸盐难选铁矿石产生了较好的分选效果。     

贵州某含硫微细粒浸染型金矿石选矿试验

贵州某含硫微细粒浸染型金矿石中金主要以硫化物包裹金形式存在,载金硫化矿物嵌布粒度细并与脉石矿物共生密切,需细磨才能使硫化物较好地单体解离,而脉石矿物多为易泥化的碳酸盐及黏土类矿物,细磨会产生大量矿泥,降低浮选指标,因此采用两段阶段磨矿-阶段浮选工艺进行选矿试验。结果表明：在一段磨矿细度为 -0.074 mm占80%时,以(NH₄）₂SO₄+CuSO₄为活化剂、丁基黄药+丁铵黑药为捕收剂、2号油为起泡剂,经1粗1精一段浮选,一段浮选尾矿磨细至-0.074 mm占95%,经1粗3精3扫二段浮选,获得的混合精矿金品位为50.79 g/t、回收率为88.31%,可以为该矿石的开发利用提供依据。     

某氧硫混合型铜矿浮选工艺研究

为了实现某氧硫混合型铜矿的高效回收,产出合格的硫化铜精矿和氧化铜精矿。根据矿石性质和浮选工艺特点,采用先浮选硫化铜矿物,然后在硫化条件下浮选氧化铜矿物的选矿原则流程。针对该流程,分别开展了硫化铜矿物和氧化铜矿物的浮选条件试验,获得了最佳工艺参数,并进行了浮选闭路试验。试验结果表明,以丁基黄药和Z-200的组合作为硫化铜物的捕收剂,以NaHS作为氧化铜矿物的硫化剂、戊基黄药作为氧化铜物的捕收剂,硫化铜矿物浮选采用一粗两扫两精的选别流程,氧化铜矿物浮选采用一粗两扫两精+两精扫的选别流程,可以获得Cu品位为22.72%、Cu回收率为64.12%的硫化铜精矿和Cu品位为25.15%,Cu回收率为20.00%的氧化铜精矿,研究结果为同类型的铜矿开发提供了数据支持和技术参考。     

石油磺酸钠在江西某石英型萤石矿中的浮选应用

萤石作为主要的含氟矿物,其在多个工业领域都具有重要的应用。萤石的常规浮选捕收剂油酸钠存在着水溶性较差的缺点,石油磺酸钠作为捕收剂时展现出良好的耐低温性,但少有其在萤石选矿中的应用。本试验以江西某地萤石矿为研究对象,进行石油磺酸钠浮选萤石的实际矿物浮选试验。结果表明:通过"1次磨矿,1粗4精"的流程试验,获得了品位为97.45%,Ca F2回收率为89.54%的萤石精矿。     

甘肃某硫化铅锌矿无碱度浮选试验研究

甘肃某硫化铅锌矿石为热液型铅锌矿,其中含铅 16.55%,含锌 13.24%,含铅矿物主要为方铅矿,此外 含少量白铅矿;含锌矿物主要为闪锌矿;脉石矿物主要为石英和碳酸盐矿物。为高效开发利用该矿石,进行了系统 的浮选试验研究,确定采用优先浮选工艺流程,即优先浮选铅矿物,浮铅尾矿经活化后再浮选锌矿物。试验结果表 明：在自然 pH（无碱）条件下,磨矿细度-0.074 mm 占 70%,以硫酸锌+亚硫酸钠为锌矿物的抑制剂、乙基黄药+乙硫 氮为铅矿物的捕收剂,经 1 粗 2 精 3 扫选铅,获得铅品位 66.45%、回收率为 84.58% 的铅精矿;浮铅尾矿在以硫酸铜 为锌矿物活化剂、丁基黄药为锌矿物捕收剂的条件下,经 1 粗 2 精 2 扫选锌,获得锌品位为 59.72%、回收率为 87.57% 的锌精矿,实现了矿石中铅锌矿物的有效回收,为该矿石的工业开发奠定了基础。     

某含萤石铍矿综合回收铍和萤石的试验研究

某含萤石铍矿中含BeO 0.33%、CaF₂ 36.53%,含铍矿物为金绿宝石,其他有用矿物为萤石,主要脉石矿物为方解石、白云石、绿泥石等,碳酸盐含量高达44.80%,选别难度极大。基于金绿宝石与碳酸盐矿物的密度差异,以及与主要矿物的可浮性差异,试验采用重液分选—优先浮选萤石—反浮选脉石的工艺流程处理该矿。针对-15 mm的原矿,首先对-15+0.5 mm粒级产品采用重液分选脱除了35.47%的脉石矿物,其中70%以上为碳酸盐矿物;再合并重液分选精矿与-0.5 mm粒级产品在磨矿细度为-0.074 mm占80%的条件下,采用组合捕收剂丁基黄药+丁铵黑药+乙硫氮浮选脱除方铅矿等硫化矿,然后利用组合捕收剂氧化石蜡皂+油酸钠浮选萤石得到含CaF₂ 95.02%、回收率为65.96%的萤石精矿,浮选尾矿脱泥后反浮选脉石矿物,可获得含BeO 1.32%、回收率为70.92%的铍精矿。铍精矿后续可采用冶金方法提取获得氧化铍产品。     

高灰煤泥深度分选提质试验研究

通过浮选过程可以将煤和脉石矿物进行有效地分离,从而实现煤泥的深度分选。测量了煤油、柴油和M101这3种捕收剂处理煤泥样品后的接触角,对比了这3种捕收剂对煤泥疏水性的影响,并采用这3种捕收剂进行了煤泥的浮选试验;将淀粉、腐植酸钠、CMC按照一定比例复配成组合抑制剂S-1、S-2和S-3,并分别对煤泥进行浮选试验。研究结果表明,选用M101作为捕收剂、S-1作为抑制剂,经过"一粗-二扫-二精"浮选试验流程后,可以得到灰分为7.94%的精煤,可燃物回收率为83.47%,实现了煤泥的高效分离。     

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。