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。     

某铁精矿浮选柱脱硫试验研究

采用浮选柱对某铁矿选矿厂生产的含硫量超过0.4%的磁铁矿精矿进行了脱硫试验研究。通过实验室浮选柱系统试验,确定了较理想的试验参数:磨矿细度-200目占96.8%以上,黄药用量240 g/t,硫化钠用量800g/t,硫酸铜用量200 g/t,2#油用量200 g/。t在此条件下,浮选柱经一次分选能够将铁精矿中硫含量降至0.084%。而浮选机经一次粗选、两次精选、一次扫选,所得铁精矿中硫品位仍在0.20%以上。     

广西某低品位白钨矿选矿试验

广西某低品位白钨矿含铁、钨有价金属,有用矿物主要为磁铁矿和白钨矿,根据矿石性质,通过两段磨矿两段磁选选铁,获得铁品位62.07%、铁回收率71.42%的铁精矿;选铁尾矿浮选回收白钨矿,较优的选别条件为:碳酸钠2kg/t调节矿浆pH值至9.5、捕收剂GYR用量600g/t、抑制剂水玻璃用量4kg/t,通过一次粗选四次扫选五次精选中矿顺序返回的浮选闭路试验流程,最终获得WO3品位61.33%、WO3回收率69.11%的白钨精矿。     

巴布新几内亚马当省某铜镍矿的选矿试验

巴布新几内亚马当省某铜镍矿含铜0.26%,含镍0.63%。根据矿石性质,采用一次粗选、两次扫选、一次精选铜镍混合浮选,中矿顺序返回的闭路浮选试验流程。在磨矿细度为-0.074 mm占80%,六偏磷酸钠用量为1500 g/t,CMC用量为400 g/t,丁基黄药200 g/t,Z-200用量为40 g/t,松醇油用量10 g/t条件下,获得了较好的选矿指标。所得铜镍混合精矿铜品位4.50%、镍品位9.22%,铜回收率86.52%、镍回收率72.73%。     

秘鲁铁矿脱硫工艺试验研究与工业化

为了解决进口秘鲁铁矿石的脱硫问题,对公司原有的工艺流程进行了改进。改进后的流程为先磁选后浮选,一次磁选、一次浮选、两次精选。在磨矿粒度-0.075 mm占83.2%,磁场强度为0.20 T,采用乙基黄药(150 g/t)、丁基铵黑药(100 g/t)、TS-3(150 g/t)联合捕收剂,硫酸铜(250 g/t)、硅酸钠(300 g/t)联合活化剂,选矿回水温度10℃,浮选机线速度6.93 m/s、浮选浓度35%的条件下,可获得产率73.07%、回收率89.23%、含铁66.5%,硫0.43%的优质铁精矿。该流程具有铁精矿品位高,脱硫率高(93.75%),工艺简单的特点。经选厂现场工业化应用,指标稳定,运转正常,取得了很好的效果。     

提高某超级铁精矿制备过程中的反浮选回收率

以安徽某粉末冶金公司超级铁精矿生产线所用普通铁精矿为原料,将其再磨、弱磁再选后进行生产超级铁精矿的反浮选试验,通过添加调整剂Na₂CO₃、水玻璃、淀粉来解决现场单纯使用十二胺引起的反浮选回收率偏低问题,并探讨通过提高矿浆浓度来提高反浮选的生产效率。试验结果表明：将2 000 g/t Na₂CO₃、200 g/t水玻璃、100 g/t淀粉与130 g/t十二胺配合使用,在24%矿浆浓度下,反浮选所获超级铁精矿的作业回收率可由单纯使用十二胺时的44.61%（对原料为43.44%）提高到89.58%（对原料为89.27%）;将矿浆浓度提高到28%,可使反浮选处理能力提高16.68%,而作业铁回收率仍达87.69%（对原料为87.38%）。     

云南某难选赤铁矿选矿试验

为给云南某难选赤铁矿的开发利用提供技术依据,在对矿石进行工艺矿物学性质研究的基础上,采用先正浮选再反浮选的流程进行选矿试验研究。试验结果表明：在磨矿细度为-0.074 mm 90%,正浮选分散剂Na₂CO₃用量为3 000 g/t、捕收剂（氧化石蜡皂与塔尔油用量比为1∶1）用量为700 g/t,反浮选抑制剂淀粉用量为1 200 g/t、活化剂CaO用量为1 200 g/t、捕收剂RA-715用量为400 g/t、NaOH调整pH值为11.5的情况下,采用1粗1扫的正浮选与1粗1精3扫的反浮、中矿顺序返回的联合流程,最终可获得铁品位为60.50%,铁回收率为80.95%的铁精矿。     

云南磨憨砂岩铜矿的浮选回收

云南磨憨砂岩铜矿含铜0. 77%,其中以氧化铜形式存在的铜金属率达45. 45%。孔雀石为主要铜矿物和目的矿物,具有氧化不充分,与褐铁矿伴生的特点,为难选矿石。浮选试验结果表明,以3 000 g/t石灰作调整剂和抑制剂、1 000 g/t硫化钠作活化剂、90 g/t丁基黄药作捕收剂、35 g/t松醇油作为起泡剂,在磨矿细度-74μm占比85%的条件下,经过"三次粗选—二次精选—一次扫选"流程,可实现铜品位18. 006%,铜回收率80. 01%的浮选指标。     

辽宁某银矿选矿试验研究

对辽宁某银矿进行了浮选试验研究。采用1次粗选、2次扫选、4次精选、中矿依次返回流程,在磨矿细度-0.074 mm粒级占79.86%、调整剂Na₂CO₃用量1 000 g/t、抑制剂水玻璃用量300 g/t、组合捕收剂乙黄药与丁铵黑药总用量100 g/t(用量比1∶1)、起泡剂2^#油用量40 g/t条件下,对银品位为74.67 g/t的原矿进行浮选试验,最终获得银精矿品位2 398.21 g/t、回收率92.03%的闭路浮选指标。试验结果可为该矿石及相关矿石的合理开发提供参考。     

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。