某包裹型铀钼矿氧化焙烧——酸浸工艺试验研究

研究采用氧化焙烧—酸浸工艺从某包裹型铀钼矿浸出铀、钼的工艺,考察了焙烧、浸出工艺条件对铀、钼浸出率的影响。试验结果表明,在矿石粒度-100目、焙烧温度550℃条件下焙烧时间5min,焙烧产物在浸出温度60℃、硫酸质量分数为8%、浸出液固体积质量比1∶1mL/g条件下浸出2h,铀和钼浸出率分别达到90.0%和86.6%。     

拌酸熟化法处理某低品位含铀钼矿试验研究

现有低品位含铀钼矿石处理工艺,存在钼浸出率低、浸出试剂消耗大、工业生产成本高等问题。通过对矿石拌酸熟化处理,重点考察了熟化矿石粒度、拌酸量、拌酸方式、温度、时间对熟化效果和钼浸出率的影响。试验结果表明：在矿石粒度-3.2 mm、拌酸质量分数13%、液固体积质量比4∶1 mL/g、熟化温度85℃、熟化时间15 h条件下,低品位含铀钼矿石经柱浸后钼浸出率可达72%。拌酸熟化工艺具有浸出周期短、浸出液固体积质量比低等优点,有利于实现工业化。     

某铀钼伴生矿赋存状态与浸出性能研究

对某铀、钼伴生矿进行了矿物赋存状态和浸出性能研究。结果表明:铀、钼矿石中U、Mo最高质量分数分别为0.262%和3%;矿石岩性为次流纹斑岩、流纹质凝灰岩和隐爆角砾岩;铀钼矿物主要为胶硫钼矿、钼铀矿、多水钼铀矿、辉钼矿。矿样粒度为-100目时,目标金属已充分暴露并有利于铀、钼浸出。水浸试验表明矿石因目标金属损失量过大而不适合物理选矿富集。矿石适宜氧化酸浸,硫酸消耗量为矿石质量9.5%、H_2O_2消耗量为矿石质量6%~8%。铀、钼的最高浸出率可达96.88%和69.12%。     

从碳酸盐型含钼铀矿石中回收铀和钼的试验研究

针对某含钼铀矿石碳酸盐含量高的特点,在工艺矿物学研究的基础上,开展碱法浸出工艺条件试验。研究结果表明:采用拌碱熟化柱浸工艺,能较好地实现矿石中铀、钼的提取;钼浸出率可达90%以上,铀浸出率为85%左右;浸出周期较常规碱法缩短了60d。     

难溶含铀碱渣氧化焙烧酸浸试验研究

为了回收难溶渣中的铀,对难溶渣进行了氧化焙烧预处理,研究了预处理工艺参数对难溶渣中铀浸出效果的影响。结果表明,难溶渣原样粒度-0.074 mm、焙烧温度1000 ℃、焙烧时间2 h条件下氧化焙烧预处理,所得焙烧渣再经硝酸浸出,铀浸出率为91.65%、渣铀品位为0.192%,渣剩余率为78.86%。试验结果可为现场处理难溶渣提供技术指导。     

复杂难选胶硫钼矿氧化焙烧-酸浸试验研究

针对胶硫钼矿难以采用物理选矿方法处理的问题, 提出了氧化焙烧-酸浸处理工艺。试验得到的最佳工艺条件为: 矿样粒度-0.074 mm粒级占65%, 不添加焙烧添加剂, 焙烧温度400 ℃, 焙烧时间45 min, 硫酸用量20%, 浸出温度80 ℃, 浸出液固比1∶1, 浸出时间5 h, 在此条件下, 钼浸出率可达91.55%。     

某低品位含钼钒碳质页岩型铀矿石浸出工艺研究

对某含钼、钒碳质页岩型铀矿石开展铀、钼、钒综合提取工艺试验。研究结果表明:该铀矿石属于难浸出的多金属矿石,直接采用硫酸或碳酸钠浸出时,均不能实现铀、钼、钒的综合提取;采用加压酸浸或拌酸熟化搅拌浸出时,矿石中铀、钼、钒3种元素均可获得比较满意的浸出效果,渣中铀品位可降至0.01%左右,钼品位可降至0.02%以下,钒的浸出率达50%以上。     

碱式焙烧—水浸法回收废催化剂中钒钼的试验研究

采用碱式焙烧—水浸工艺处理含钒、钼的废催化剂,并对参数条件进行了优化。优化后的工艺条件为:焙烧温度700℃、碳酸钠添加量40%、焙烧时间120min、浸出温度90℃、固液比0.20g/mL、浸出时间90min、搅拌速度400r/min,此条件下,钒和钼的浸出率分别可以达到97.61%和97.33%。     

废催化剂中钼、钒回收工艺的研究

比较了加碱焙烧浸出和焙烧碱浸方法。选择焙烧碱浸工艺进行试验,使用碳酸钠为浸出剂,考察了焙烧温度、焙烧时间及碳酸钠浓度等条件对钼、钒浸出率的影响。确定焙烧温度为650℃,焙烧3 h,碳酸钠加入量为50 g/L的一次逆流浸出工艺,在该工艺下钼的浸出率达91%,钒的浸出率达77.17%。考察沉降温度及氯化铵浓度对钒的沉降率的影响,确定温度在80～90℃,氯化铵浓度为90 g/L时,钒的沉降率达到97%。     

碳酸钠浸出钼精矿中钼的研究

考察了浸出温度、浸出时间、钼精矿粒度、搅拌速度、碳酸钠加入系数β(碳酸钠与钼精矿质量比)和液固比对钼精矿中钼浸出率的影响。通过试验研究, 确定了采用碳酸钠浸出钼精矿中钼的较优技术参数。在浸出温度为85 ℃、浸出时间为120 min、钼精矿粒度为-0.1 mm、搅拌速度为350 r/min、β为1.5、液固比为4∶1的条件下, 钼的浸出率大于99%。该浸出工艺的研究, 为某厂处理钼精矿提供了可靠技术参数。     

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

正~~     

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