山东某低品位金矿工艺矿物学

山东某地金矿平均含Au 0.8～1.0 g/t,属低品位金矿。由于矿石含金较低,为降低选矿成本,有效回收有价金属,对矿石进行详细的工艺矿物学研究。研究发现,该矿石自然类型为石英黄铁矿脉,工业类型为中硫金矿石。矿石中金属矿物主要为硫化物,以黄铁矿为主,次为方铅矿、闪锌矿,含少量黄铜矿等,非金属矿物主要为石英、绢云母等。矿石中黄铁矿粒度较粗,方铅矿、闪锌矿、黄铜矿等粒度较细,黄铁矿、方铅矿等与金关系较密切,是金的主要载体矿物。自然金主要为细粒金,多呈包裹体分布。根据工艺矿物学研究结果,建议采用“重选+浮选”工艺流程,不但取得较高的精矿指标,且降低了选矿成本。      

内蒙古柴胡栏子金矿石的工艺矿物学研究

为给柴胡栏子金矿原选矿流程中全泥氰化工艺的改造提供可行的理论支撑,采用化学分析、矿物自动分析仪分析、扫描电子显微镜分析、X射线能谱分析、光学显微镜分析等测试手段,对内蒙古赤峰柴胡栏子金矿进行详细的工艺矿物学研究,明确其化学组成、矿物组成、粒度分布及有用矿物的嵌布特征关系。结果表明:该金矿中金品位为2.83 g/t。金主要以银金矿的形式存在,主要脉石矿物为石英、绿帘石、绿泥石、绢云母、方解石。金矿中的矿物组成十分复杂且脉石矿物嵌布粒度极细,属于细粒石英脉型金矿。银金矿以包裹金、粒间金和裂隙金的形式产出。黄铁矿和磁黄铁矿为金的主要载体矿物,分布率分别为41.61%、23.77%。综合工艺矿物学结果,最终提出了采用分段磨矿,重—浮联合回收金的绿色环保选矿工艺流程。     

小秦岭某金矿工艺矿物学研究

小秦岭金矿带是我国重要的岩金矿区之一,区域内金矿分布广泛。利用多种分析测试手段对矿石的化学成分、矿物组成、自然金粒度以及矿石的结构构造等进行了详细研究。该矿石为石英脉型多金属金矿石。共见自然金44粒。在嵌布关系上,以黄铁矿裂隙金为主,与晚结晶的方铅矿、黄铜矿伴生。自然金形态以粒状和板状为主。详细的工艺矿物学研究为小秦岭金矿的选矿工艺和开发提供了理论数据。     

从低品位金矿石中回收金的试验研究

柴胡栏子金矿矿石为绢云母化蚀变岩型及贫硫化物含金石英脉型,金嵌布粒度极细,分布极不均匀,与硫化物关系不密切,大部分与非金属脉石矿物共生,属于难浮选矿石。试验研究结果表明,就地堆浸是处理该矿石最合理的工艺,金回收率达60%。     

西藏某铅锌矿工艺矿物学研究

针对西藏某地铅锌矿石进行了工艺矿物学研究。利用多种分析检测手段对矿石的化学成分、矿物组成、矿石粒度以及矿石结构等进行了详细研究。西藏某地铅锌矿矿石矿物成分复杂,主要有用矿物有方铅矿、闪锌矿等,其中铅、锌主要以硫化物形式存在。该矿属于典型的易浮难选矿。脉石矿物主要有石英、白云母和高岭土。矿石结构较为复杂,以它形粒状及乳滴状结构为主。详细的工艺矿物学研究为西藏某地铅锌矿石选矿工艺的选择和开发提供了理论数据。     

陕西某铜金矿矿石性质研究及对选矿工艺的影响

针对陕西某铜金矿利用多种分析检测手段对矿石的化学成分、矿物组成、矿石粒度以及矿石结构等进行了详细研究。该矿中的有用矿物主要有黄铁矿、磁铁矿、黄铜矿,含少量的赤铁矿、辉钼矿等。脉石矿物主要以石榴子石、绿帘石、阳起石为主,含少量方解石、石英绿泥石等。金主要赋存在硫化矿中。详细的工艺矿物学研究结果建议该铜金矿采用优先浮选或混合浮选的工艺流程进行选别。     

陕西某镍矿工艺矿物学研究

本文通过多种分析检测手段对陕西某镍矿的化学成分、矿物组成、矿石粒度以及矿石结构等进行了详细研究。该地镍矿石矿物组成复杂,其中脉石矿物种类较多,主要为滑石、蛇纹石、菱镁矿、白云石、高岭石、石英、角闪石和绿泥石等。镍主要以镍黄铁矿的形式存在。除黄铁矿粒度较粗外,其他矿石矿物粒度较细,增加了选矿难度。另外,矿石中滑石和蛇纹石等脉石矿物可浮性较好,不易与硫化物分离。详细的工艺矿物学研究为陕西某镍矿石选矿工艺的选择和开发提供了理论数据。     

某地金矿工艺矿物学研究

为充分了解某地金矿矿石性质,制定合理的选别工艺流程,通过化学分析、扫描电镜以及工艺矿物学自动定量分析系统（MLA）等测试方法对金矿矿石进行了系统的工艺矿物学研究,包括矿石矿物组成及相对含量、矿石矿物的结构构造、金矿物的形态和粒度分布特征、主要金属矿物和脉石矿物的产出特征等,并且对原矿进行了浮选试验和重浮联合工艺试验。 结果表明,该金矿中主要可回收的有价金属为金,其含量为3.74g/t。 该金矿的原矿矿物主要由黄铁矿、石英、白云母和碳酸盐矿物组成,此外还有少量的方铅矿、黄铜矿、绿泥石和黑云母, 还含有微量磁铁矿和锐钛矿等。 原矿中自然金多以单独的自然金颗粒形式存在,金主要嵌布在黄铁矿中,而黄铁矿多以自形-半自形粒状及粒状集合体产出,呈浸染和团块状分布在脉石中。采用“重选+浮选”联合工艺流程,可获得指标良好的重选精矿和浮选精矿,重选精矿中Au的品位和回收率分别为54.75g/t、78.10%;浮选精矿中Au的品位和回收率分别为6.45g/t、19.78%,金矿总回收率为97.88%。该研究为该地区矿产综合利用提供了技术借鉴。     

甘肃白银郝泉沟金矿金的赋存状态研究

郝泉沟金矿矿石类型以蚀变岩型为主,其次为石英脉型。矿石中硫化物种类较少,分布不均匀,粒度不等,嵌镶关系较简单。金主要为独立矿物—自然金,载体矿物为黝铜矿、闪锌矿、方铅矿、黄铁矿、石英、白铅矿等,并以微细粒裂隙金和粒间金为主,成色930‰,适宜于优先浮选后氰化浸出工艺流程。     

某多金属硫化物金矿综合利用试验研究

某多金属硫化物金矿属于石英脉型矿床,矿石原生泥含量高,对选矿影响大。笔者针对该矿石性质,在保证金的回收率的前提下,采用先浮选金后浮选锌的选矿工艺,分别得到含Au41.51g/t,回收率94.56%的金精矿;含Zn 43.30%,回收率66.71%的锌精矿,同时金精矿中还回收了大部分铜、铅、银等,为该矿的综合利用提供了较好的方案。     

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