铁矿反浮选脱硅的试验研究

对新型阳离子浮选药剂进行了铁矿反浮选脱硅的试验研究。结果表明：在pH=6～12的范围内，新型药剂CS1和组合药剂(CS2：CS1=2)的捕收能力与十二胺相当，但选择性更好。磁选铁精矿反浮选脱硅试验表明：新型组合药剂在获得与十二胺相近的铁品位前提下，铁回收率提高了8．32％。同时对硬水有较好的适应性，铁精矿品位仍可保持在69％以上，回收率90％以上。具有较好的适应性，是铁矿反浮选脱硅的有效捕收剂。     

某铁矿强磁尾矿反浮选回收试验研究

针对我国西部某铁矿强磁选尾矿进行了反浮选回收铁资源的试验研究, 探讨了pH值、抑制剂可溶性淀粉用量、阳离子捕收剂十二胺用量对浮选指标的影响。结果表明, 在矿浆pH=10、可溶性淀粉用量2 400 g/t、十二胺用量400 g/t条件下进行一粗一精(精选药剂用量减半)闭路反浮选, 可获得铁品位43.88%、回收率50.93%的铁精矿产品。     

新型阳离子捕收剂MZ-3的浮选与消泡行为研究

为检验武汉理工大学相关课题组开发的新型阳离子捕收剂MZ-3在磁选铁精矿反浮选中的捕收性能以及消泡行为,以酒钢公司焙烧-弱磁选铁精矿为原料进行了选别和消泡试验。结果表明：①对全铁品位为49.98%的磁选铁精矿进行反浮选脱硅,在pH=7、温度为25 ℃、MZ-3用量为500 g/t、苛性淀粉用量为300 g/t的情况下1次粗选,可获得铁品位为57.01%、铁回收率为74.66%的铁精矿,较好地实现了铁硅分离。②与捕收剂M-302B、醚胺和十二胺相比,MZ-3不仅反浮选精矿产品指标好,而且消泡速度快。因此,MZ-3是一种捕收效果好、易消泡的新型阳离子捕收剂,有利于改善选矿厂的生产指标、提高系统的稳定性。     

重庆巫山桃花铁矿选矿脱泥—反浮选试验

重庆巫山桃花铁矿属于高磷鲕状赤铁矿,为了合理地开发利用重庆巫山桃花铁矿,以获得合格铁精矿。根据其矿石性质特点,试验采用了脱泥—反浮选脱磷—反浮选脱硅联合选矿工艺,得到了铁品位为53.79%,磷含量为0.25%,浮选作业铁回收率为80.10%的铁精矿。     

重庆巫山桃花铁矿选矿脱泥—反浮选试验

重庆巫山桃花铁矿属于高磷鲕状赤铁矿,为了合理地开发利用重庆巫山桃花铁矿,以获得合格铁精矿。根据其矿石性质特点,试验采用了脱泥—反浮选脱磷—反浮选脱硅联合选矿工艺,得到了铁品位为53.79%,磷含量为0.25%,浮选作业铁回收率为80.10%的铁精矿。     

阳离子捕收剂烷基多胺醚在尖山铁矿的试验研究

通过试验比较了烷基多胺醚系列捕收剂GE-601,GE-610,GE-609,GE-609与十二胺的捕收性能及其泡沫状况,试验结果表明GE-601是理想的阳离子捕收剂。在不添加其他药剂的情况下,用1粗3扫闭路浮选流程处理铁品位为64．53％的尖山铁矿的粗精矿,获得了铁品位为69．41％、回收率为98．42％的优质铁精矿。     

鞍山某磁选铁精矿阳离子反浮选试验

以六偏磷酸钠、苛性淀粉为调整剂,DEK为新型阳离子反浮选捕收剂,对鞍山某铁矿选矿厂磁选铁精矿进行了反浮选工艺研究。结果表明,以DEK为核心的阳离子反浮选药剂体系与原阴离子反浮选药剂体系相比,药剂制度明显简化,可在中性环境下浮选,浮选无需蒸汽加温至30 ℃左右;采用试验确定的流程和药剂制度处理该磁选铁精矿,可获得铁品位为66.02%、回收率为90.16%的最终铁精矿。     

反浮选新药剂选别袁家村铁矿石试验研究

采用长沙矿冶研究院研制的新型阴离子反浮选捕收剂CSC-68和新型调整剂CSR-36对袁家村铁矿石磁选精矿进行了反浮选试验,并与传统的NaOH +淀粉+CaO+脂肪酸阴离子捕收剂4药剂组合进行了对比。试验结果表明：采用两种新药剂的组合,可获得品位为66.06%,回收率为87.19%的反浮选铁精矿,精矿铁品位和回收率分别比传统4药剂组合高0.96和0.87个百分点。新药剂不仅选别指标优越,而且大大简化了药剂制度,还可避免因使用CaO而引起的管道结垢问题。     

新型抑制剂DHY反浮选鞍千混合磁选精矿

为实现磁选铁精矿的高效、低耗反浮选富集,东北大学研制出了价格低廉、性能稳定的类淀粉结构的新型铁矿物抑制剂DHY。为论证该药剂优化鞍千矿业公司混合磁选精矿反浮选工艺的可选性,以现场药剂制度为基础进行了反浮选试验。结果表明,铁品位为47.64%、粒度较细、铁矿物在微细粒级明显富集、脉石矿物以石英为主的鞍千矿业公司混合磁选铁精矿,以DHY为铁矿物抑制剂,采用1粗1精2扫闭路反浮选流程处理,可获得铁品位为68.21%、回收率为88.01%的铁精矿,尾矿铁品位降至14.82%,与现场相比,不仅显著改善了精矿指标,而且可降低药剂用量、简化工艺流程。     

褐铁矿反浮选脱硅新工艺试验研究

试验针对广东某褐铁矿矿石共生关系简单的特点,采用强化矿浆分散阳离子反浮选脱硅新工艺,即采用碳酸钠用量为1250g／t和水玻璃用量为600g／t实现矿浆的强化分散。在磨矿细度为80％-0．074mm、十二胺用量200g／t、浮选时间18min的条件下,选别该褐铁矿石获得铁精矿铁品位为59．25％、全铁回收率为83．42％的较好指标。     

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。