安徽李楼镜铁矿低温捕收剂反浮选试验研究

在CY脂肪酸类捕收剂低温条件试验的基础上,对李楼低磷低硫的单一酸性中贫氧化铁矿浮选给矿样进行了浮选试验研究。结果表明,在氢氧化钠用量1 000 g/t、淀粉用量400 g/t、氧化钙用量400 g/t、浮选温度20℃的条件下,获得精矿铁品位66.61%、铁回收率93.50%的分选指标;在浮选温度为35℃的条件下,对该矿石开展了浮选分离试验研究,可获得精矿铁品位67.05%、铁回收率93.71%的指标。综合比较分选结果可知,低温浮选可获得与高温浮选接近的分选指标。     

中国磷矿选矿研究现状与展望

本文总结了当前国内磷矿选矿的科研成果，包括磷矿的浮选机理、工艺、药剂以及化学与生物处理、磷尾矿综合利用等方面研究。浮选机理应用了红外光谱表征、接触角测量、单矿物浮选、Zeta电位测试、试剂吸附量等进行了研究。浮选工艺以多步浮选和联合分选技术为主，但同时也呈现多元化。浮选药剂的研究以捕收剂和调整剂为主,高性能低温捕收剂可通过改性复配获得；采用酸分解低品位磷矿石,可获得多种磷化工产品,溶磷率可通过微生物分解得以提高；在选矿废水处理和磷尾矿综合利用等方面也有了长足的进步。     

白钨矿浮选731捕收剂低温乳化试验研究

介绍了731捕收剂在低温条件下试验的情况。试验研究结果表明，采用A和B药剂以5：6的比例混合组成的复合乳化剂对731进行乳化，低温时乳化体系稳定性好，浮选过程中降低乳化731的用量，同时提高了选择性，降低了浮选成本，实现了低温环境下白钨矿正常浮选作业，达到选矿技术攻关指标。     

湖北某重晶石-萤石型矿综合利用研究

湖北某萤石矿为重晶石-萤石型矿石,重晶石含量达40%以上。对综合利用萤石与重晶石资源进行了浮选工艺研究,并对低温浮选进行了试验探索,低温浮选试验表明FX-6A比现用的油酸捕收剂具有更好的耐低温性。试验结果表明,利用FX-6A作为萤石捕收剂,CRY-A作为重晶石抑制剂,通过1次混合浮选,6次分离浮选,常温闭路试验可获得Ca F2品位97.68%、回收率92.85%的萤石精矿以及Ba SO4品位91.85%、回收率78.04%的重晶石精矿。     

铁矿阴离子低温反浮选试验研究

对自行研制的新型低温阴离子反浮选捕收剂进行了袁家村、尖山、祁东铁矿低温反浮选试验。结果表明,该低温捕收剂可以在15℃下成功分选铁矿石,选矿指标与30℃接近。铁矿石低温浮选可以大幅度节能降耗,降低反浮选成本。     

萤石浮选增效剂及其应用

通过在萤石浮选中增效剂对油酸的增效作用的研究，证明增效剂以低复配比组成的增效油酸，具有低温浮选和抗钙、镁离子干扰的良好的性能。增效油酸的使用，实现了碳酸盐－萤石矿在５℃低温和硅酸盐－萤石矿在３℃低温下的正常浮选。与皂化油酸和超声波乳化油酸相比，具有浮选指标提高和捕收剂量大幅降低的显著效果。     

石油磺酸钠低温浮选石英型萤石的试验研究

针对含CaF₂ 47.48%、SiO₂ 39.70%的石英型萤石矿,采用常规萤石浮选捕收剂油酸钠在低温度的矿浆环境下较难获得良好的选别指标,为了改善该萤石矿在低温下的浮选效果,采用耐低温性好的石油磺酸钠捕收剂(PSK-13)进行浮选试验研究。结果表明,以碳酸钠作调整剂、水玻璃作抑制剂、PSK-13作捕收剂,采用1次粗选6次精选,中矿顺序返回的闭路浮选流程,可在矿浆温度为5℃时获得CaF₂品位98.57%、回收率为75.02%的FC-98级别的萤石精矿,为该矿在低温下的浮选提供了技术参考。吸附量测试表明,在5～30℃间,PSK-13在萤石表面的吸附量变化不大,且均大于油酸钠的吸附量,因此具有良好的低温捕收性能。     

新型低温捕收剂DGT-P对齐大山铁矿石的反浮选应用研究

在实验室自主研发的新型组合型捕收剂DGT-P体系下,针对齐大山铁矿选矿分厂的混合磁选精矿进行了浮选实验研究,确定了较佳的药剂制度,并考查了浮选效率。在矿浆温度20 ℃、pH值=10.0、捕收剂DGT-P用量800 g/t、抑制剂玉米淀粉用量1200 g/t、不添加活化剂的条件下,经过 “一粗一精一扫”的浮选闭路实验,针对铁品位为48.22%的浮选给矿,可获得精矿铁品位69.23%及铁回收率91.52%的良好浮选指标。本研究表明新型低温捕收剂DGT-P是一种高效、选择性高的低温浮选捕收剂,该药剂的推广与应用将会有效解决我国铁矿阴离子反浮选过程中能源浪费问题。     

白钨浮选尾矿回收萤石低温浮选试验研究

针对某地白钨浮选尾矿进行萤石低温浮选回收,在矿浆温度为12℃的条件下,试验室小型闭路试验获得的指标为:萤石浮选给矿CaF2含量为24.53%,CaCO3含量为6.25%;萤石精矿中CaF2含量为95.12%,回收率为58.07%,CaCO3含量为0.44%。在萤石浮选给矿CaF2含量为22.34%的条件下,工业试验获得萤石精矿中CaF2含量为93.70%,回收率为38.10%,CaCO3含量为1.40%。     

增效油酸在萤石矿低温浮选中的应用

以表面活性剂对脂肪酸类捕收剂增效机理的研究为基础，针对增效油酸在萤石矿低温（５℃￣１０℃）浮选工艺中的主要影响因素进行了系统的试验研究，为萤石矿低温条件下的有效浮选提出了一条新途径。     

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