微生物浸出中微生物-矿物多相界面作用的研究进展

微生物浸出体系涉及微生物-矿物、矿物-矿物、微生物-溶液-矿物-气相等多相界面作用。综合国内外文献报道,针对矿物-水、微生物-矿物和矿物-矿物界面, 较全面的阐述了多相界面作用的影响因素、作用机理及其在生物冶金中的应用。最后根据目前研究现状提出了近期微生物-矿物多相界面作用的研究趋势。     

某含铜铁矿石选铁工艺试验研究

对铁品位34%左右的某铜铁矿山选铜尾矿进行了单一强磁选、强磁选-重选、强磁选-磨矿-反浮选、强磁选-磨矿-强磁选-反浮选、磨矿-强磁选-反浮选的多方案试验研究, 经对比分析, 最终确定采用磨矿-强磁选-反浮选工艺, 可获得精矿铁品位63.17%、回收率70.30%的良好指标。     

利用铜矿尾矿制备微晶玻璃试验研究

某铜尾矿主要矿物成分为石英、方解石、绿帘石、赤铁矿等,属高铁、低硅型尾矿,采用原料加工-配料混匀-熔制玻璃-水淬成粒-过筛-铺料装膜-烧结流平-晶化成型-抛磨-切割-成品检验工艺,生产CaO-MgO-AL_2O_3-SiO_2四元系统的微晶玻璃,产品主要技术指标达到GB/T13981-2008标准。     

某细粒级铁矿选别试验

针对某铁矿石铁含量较低、铁矿物嵌布粒度较细的特点,进行了磨矿-1粗1精弱磁选-细筛筛分-筛下弱磁选-筛上返回再磨、磨矿-1粗1精弱磁选-精矿再磨机单独磨矿-弱磁精选-细筛筛分-筛下弱磁选-筛上返回再磨机再磨、磨矿-1粗1精弱磁选-细筛筛分-筛上单独再磨-返回细筛筛分-筛下弱磁选3种流程的磨选工艺条件试验,并对细筛工艺进行了优化。试验结果表明：采用磨矿-1粗1精弱磁选-细筛筛分-筛上单独再磨-返回细筛筛分-筛下弱磁选流程处理此矿石,可获得铁品位为68.64%、回收率为85.02%的合格铁精矿。     

“中国岩金勘查第一深钻”已入地3000m

《中国矿业报》消息(2012-05-12)由山东地质三队在莱州施工的"中国岩金勘查第一深钻"ZK96-5钻孔日前已钻深3000.23 m。据悉,这次科研钻探共在莱州三山岛西岭矿区布设了3个钻孔,分别是ZK96-4、ZK96-5、ZK112-1。其中ZK96-4、ZK112-1设计钻孔深度各为3000 m,ZK96-5设计钻孔     

某高氟铁矿脱氟工艺研究

对某高氟铁矿进行了系统脱氟工艺研究,查明了矿石中氟的赋存状态和嵌布关系,分别开展了阶段磨矿-弱磁选、阶段磨矿-弱磁选-淘洗和阶段磨矿-弱磁选-反浮选等脱氟工艺研究,结果表明,阶段磨矿-弱磁选-反浮选-浮选尾矿再磨再选工艺获得了产率27.23%、TFe品位66.34%、回收率70.98%、F含量0.38%的铁精矿,脱氟效果良好。     

南芬露天铁矿北山部位矿石选矿新技术及工艺试验

为了探索设计南芬露天铁矿北山部位矿石的工艺流程,针对该矿石进行了工艺矿物学研究,根据工艺矿物学研究结果设计了阶段磨矿-弱磁-中磁-强磁-磁化焙烧-弱磁选、阶段磨矿-弱磁-强磁-反浮选、阶段磨矿-弱磁-强磁-重选-反浮选3种工艺流程,并进行了试验室流程试验,根据流程试验数据确定阶段磨矿-弱磁-强磁-反浮选流程为最优流程,并获得了铁精矿全铁品位≥66%,全铁回收率≥75%的满意指标。     

鞍山地区红铁矿选矿技术研究

按矿物组成、结构构造、矿物嵌布粒度、原矿品位对鞍山地区东鞍山铁矿石、齐大山铁矿石的资源特点进行了分析。介绍了鞍山地区过去应用和现在改进的连续磨矿、单一碱性正浮选工艺,阶段磨矿、重选-磁选-酸性正浮选工艺,焙烧-磁选工艺,连续磨矿、弱磁-强磁-阴离子反浮选工艺,阶段磨矿、粗细分级、重选-磁选-阴离子反浮选工艺,并分析了上述各个工艺流程的特点,对鞍山地区红铁矿下-步选矿技术进步提出建议。     

煤炭资源枯竭城市“人口-土地-产业”耦合测度研究

人口、土地、产业发展是否协调是衡量煤炭资源枯竭城市高质量发展和转型升级的重要标识。为科学揭示煤炭资源枯竭城市人口、土地、产业发展水平及协调关系,本文以东北地区、东部地区、中部地区、西部地区的13个地级市为例,通过构建"人-地-业"发展指标体系,综合评价煤炭资源枯竭城市"人-地-业"发展水平,并利用耦合协调度函数,测算地级煤炭资源枯竭城市"人-地-业"耦合协调度,分析了协调度的时空分布规律。结果表明:煤炭资源枯竭城市"人-地-业"综合发展水平总体呈下降态势,人口系统总体呈现较高的发展程度,土地系统发展水平较低;东部地区"人-地-业"综合发展水平较高,东北地区较低;煤炭资源枯竭城市"人-地-业"耦合协调水平较低,总体处于勉强耦合或初级耦合阶段,人口、土地、产业共振性较差;煤炭资源枯竭城市"人-地-业"发展水平与耦合协调关系存在显著的时空差异特征,表现为东部地区城市"人-地-业"耦合协调程度较高,东北地区和西部地区城市"人-地-业"濒临失调。最后,本文从培育接续产业和延伸产业链、优化人才政策和城市空间等方面提出了实现"人-地-业"全面协调发展的政策建议。     

铜冶炼烟尘回收铟技术进展

综合评述了国内外铜冶炼烟尘回收铟的技术进展,介绍并评述了电炉熔炼-碱溶法、常压酸浸-萃取法、高压酸浸-萃取法、离子浮选法、常压氧化酸浸-萃取法、硫酸化焙烧-萃取法、氯化挥发-溶解法等从铜冶炼烟尘回收铟的技术,并对铜冶炼烟尘回收铟的技术进行了展望。     

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。