云南某铝土矿反浮选脱硅试验

云南某铝土矿石为一水硬铝石型高硅高铝低铝硅比矿石,研究了矿石反浮选提铝降硅工艺技术条件。研究结果表明：在磨矿产品细度为-0.074 mm占85%,pH=5.5,组合捕收剂GE-601+E3总用量为150 g/t（质量比为21）,抑制剂OP用量为600 g/t情况下,采用1粗1精3扫、中矿顺序返回闭路反浮选试验流程处理该矿石,室温和8 ℃下反浮选精矿Al₂O₃品位分别为67.65%和67.52%,回收率分别为82.04%和81.77%,铝硅比分别为10.72和10.58,组合捕收剂室温和低温脱硅浮选效果均良好。     

辽宁某低品位菱镁矿提纯降杂试验研究

辽宁镁矿资源储量丰富,菱镁矿降杂提纯是个现实问题。本文针对辽宁某菱镁矿钙镁含量高的特点,通过采用"反—正"浮选的工艺流程来降低菱镁矿中硅钙杂质,对该菱镁矿进行提纯降杂试验。通过条件试验确定磨矿细度-0.074 mm 70%,反浮选使用混合胺作为捕收剂用量150 g/t;正浮选pH值调整剂为碳酸钠用量800 g/t,混合抑制剂为水玻璃和六偏磷酸钠按4∶1混合用量600 g/t,捕收剂为油酸钠用量1200 g/t的药剂制度。通过二次反浮选二次正浮选的工艺流程最终获得菱镁矿回收率为68.21%,该工艺流程把菱镁矿MgO品位从41.78%提高到46.87%,SiO_2和CaO含量分别从4.21%和3.15%降到0.41%和0.91%的良好指标。该试验研究结果可为低品位菱镁矿提纯降杂提供基础依据。     

新疆某镜铁矿选矿实验研究

采用弱磁-强磁-反浮选工艺对新疆某难选镜铁矿进行了选矿试验研究。原矿磨至-0.074 mm粒级占85%, 在弱选磁场强为167 kA/m、强磁选场强为0.8 T的条件下通过弱磁-强磁工艺获得反浮选的给矿, 在捕收剂JH用量为860 g/t、NaOH用量为1 280 g/t、玉米淀粉用量为1 000 g/t、CaO用量为500 g/t时, 经一粗三扫一精反浮选流程, 可获得铁精矿品位64.12%、回收率70.39%的较好指标。     

某铝土矿新型组合捕收剂试验研究

采用自行研制的新型ZF组合捕收剂,对主要成分为高岭石和一水硬铝石,Al₂O₃品位为63.16%,铝硅比为5.32的一种山西铝土矿进行正浮选脱硅试验。在磨矿细度-0.074 mm占84.51%,碳酸钠用量3 500 g/t,硅酸钠用量113 g/t,ZF捕收剂用量800 g/t的条件下,通过1次粗选,1次精选,2次扫选,获得了精矿Al₂O₃品位68.92%,Al₂O₃回收率81.05%,铝硅比9.16的较好指标。     

新型捕收剂H-27A在李楼铁矿反浮选中的试验研究

李楼铁矿选矿厂采用强磁选-重选-阴离子反浮选联合流程,原阴离子反浮选作业存在浮选过程稳定性差,泡沫粘、浮选选择性差,尾矿品位高达23%,铁损失率大等问题。为解决这些问题,以新研制的捕收剂H-27A对现场浮选工艺流程进行了浮选试验。结果表明:在NaOH用量为1200g/t(pH=12)、淀粉用量为600g/t,CaO用量为300g/t,捕收剂H-27A用量为700+300g/t的条件下,采用一粗一精三扫流程工艺,获得了铁品位66.85%,铁回收率90.71%的铁精矿,浮选精矿品位和回收率分别提高了1.7和0.78个百分点,同时尾矿品位降低至18.38%,显著提高了选别指标。     

国外某低品位氧化矿浮选-氰化法回收金的试验研究

为提高国外某低品位氧化矿中金的回收率,本文采用浮选-氰化工艺流程：在原矿磨矿细度-74 μm占74.65%,pH=9.0,调整剂氧化钙用量1000g/t、活化剂硫酸铜用量200g/t、捕收剂丁铵黑药60g/t、丁基黄药用量120g/t、起泡剂松醇油用量60g/t时,采用1粗2精2扫闭路试验流程,获得金品位24.30g/t,金回收率72.17%。进一步对浮选尾矿氰化浸出,金浸出率可达92.31%。     

河南某稀土选矿工艺试验研究

在对河南某稀土矿产的选矿试验研究中,经多项选矿工艺流程试验,如单一重选试验、单一磁选试验、单一浮选试验、"磁选-磁精重选"试验、"磁选-磁精浮选"试验,及浮选药剂筛选试验等,最终确定"磁选-磁精浮选"工艺为最佳选矿工艺流程,浮选捕收剂选用CK-6。确定选矿工艺参数为:磨矿细度小于0.075mm占70%,磁选磁场强度为1.2T、浮选氢氧化钠用量500g/t,水玻璃用量500g/t,氟硅酸钠用量500g/t,CK-6用量750g/t。在上述工艺条件下,经三段磁选和"一粗三精三扫"浮选闭路试验,获得了REO品位53.87%、REO回收率76.49%的精矿产品。     

从湖南某冶炼厂铅渣中回收铅

为了实现绿色低碳回收铅冶炼渣中的铅,针对湖南某铅冶炼厂废渣进行工艺矿物学分析,提出了采用"磁选+浮选"联合选矿工艺流程,并对回收富集过程中的主要影响因素进行研究。试验结果表明:在磁选磨矿细度-74μm含量占70%、磁场强度为4 000kA/m、浮选磨矿细度为-45μm含量占80%时,硫化钠用量1 000g/t,丁基黄药用量150g/t,松醇油用量30g/t的条件下,经一段磁选和一粗二精二扫中矿返回"的闭路浮选联合工艺流程,使废渣铅品位从3.35%提高至16.53%、回收率达51.42%。可为固废处理行业从铅冶炼渣中回收铅提供参考。     

西藏某高铁铜矿中有价金属的综合利用

为回收西藏某高铁铜矿的铜、硫和铁等有价元素,进行先磁选后浮选与先浮选后磁选两种选矿方案的比较,确定采用先浮选后磁选的工艺流程。在磨矿细度-74μm占80%、石灰用量4 000 g/t、水玻璃用量1 000 g/t、丁基黄药用量120 g/t的药剂制度下,取得铜品位21.61%、铜回收率93.89%的铜精矿。浮选尾矿经0.3 T弱磁选矿得到铁品位55.95%、铁回收率38.86%,硫品位29.29%、硫回收率48.22%的磁黄铁矿精矿。     

磁选—浮选联合工艺从东鞍山铁矿浮选尾矿中回收铁的试验研究

东鞍山烧结厂浮选尾矿TFe品位为22.82%,FeO含量为9.87%,SiO₂的含量为51.24%,S和P含量较低,均为0.03%,属于低硫、低磷、高硅型铁尾矿。此外,该尾矿-0.038 mm粒级含量高达56.44%,同时铁矿物主要集中在该粒级中,铁分布率达到67.62%。为了实现该铁尾矿的高效回收利用,本试验采用搅拌磨磨矿—弱磁选—强磁粗选—强磁精选—反浮选流程开展了系统的试验研究。结果表明:在搅拌磨磨矿细度为?0.038 mm占95%、弱磁选磁感应强度95 kA/m、强磁粗选磁场磁感应强度796 kA/m、强磁精选磁场磁感应强度398 kA/m的条件下,可获得TFe品位为38.20%、TFe回收率为63.51%的混合磁选精矿指标;将混合磁选精矿在矿浆温度40 ℃、矿浆pH值为11.5、淀粉用量1000 g/t、CaO用量900 g/t、粗选捕收剂TD-2用量600 g/t、一次精选捕收剂TD-2用量为300 g/t、二次精选捕收剂TD-2用量为300 g/t的条件下进行反浮选,闭路试验可获得TFe品位为62.34%、TFe作业回收率为55.10%的浮选精矿。全流程TFe回收率为35.00%,综合尾矿TFe品位为17.01%。试验结果可为东鞍山浮选尾矿中的铁矿物高效选矿回收提供指导。      

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