川西某金矿选矿试验探索

对川西某金矿的矿石特征进行了研究,在此基础上进行了全泥氰化试验和单一浮选试验。全泥氰化浸渣金品位为0.46 g/t,浸出率为87.5%,另外矿石中金属硫化物较多,且金的粒度细小,有碍于氰化的砷矿物含量较高,不利于金矿物的提取。相对而言,单一浮选工艺流程更适合该金矿床,原矿金品位为3.86 g/t,经过一次粗选、两次精选、两次扫选,获得的精矿金品位为65 g/t,金回收率91.7%。     

某微细粒嵌布金矿石浮选试验研究

某金矿石中的金矿物主要以自然金的形式存在,其颗粒细小,属于微细粒金,且与脉石关系密切,同时矿石中又含有一定量的粘土矿物,对分选不利。对该矿石采用浮选法富集金矿物,通过2次粗选、1次扫选和2次精选,在原矿金品位为3.82 g/t的情况下,获得了精矿金品位为63.80 g/t,金回收率为92.08%的较好试验指标,     

陕西安康某金矿选矿试验研究

陕西安康某以褐铁矿为载体矿物的次生氧化型含金矿石结构及矿物组合较简单,自然金成独立矿物相出现,粒度较细,金品位为3.91 g/t,裸露金、半裸露金占总金的89.53%;脉石矿物以石英为主,其次为云母、方解石、长石和绿泥石等。为高效开发利用该矿石资源进行了选矿试验。结果表明,矿石在磨矿细度为-0.074 mm占65%的情况下,采用1次摇床重选,重选中矿、尾矿合并1粗1精1扫闭路浮选的联合工艺流程处理,可获得金品位为43.72 g/t、金回收率为83.51%的摇床金精矿,以及金品位为23.81 g/t、金回收率为12.42%的浮选金精矿,总金精矿金品位为39.45 g/t、金回收率为95.93%,试验指标良好。     

山东某金尾矿金回收工艺研究

山东某金尾矿金品位为0.87 g/t,金主要集中微细粒级。矿物颗粒中的金以自然金和银金矿形式存在,分别占总金的56.33%和43.67%。为确定合适的回收工艺,进行了选矿试验研究。结果表明:采用2粗2精2扫流程处理试样,可获得金品位为8.50 g/t、回收率为56.69%的金精矿,尾矿金品位降至0.40 g/t。     

某高砷含碳低品位难选金矿浮选试验研究

对某高砷含碳低品位难选金矿进行了浮选试验研究。采用碳酸钠和水玻璃为调整剂, 实现了矿泥分散和脉石矿物的选择性抑制; 采用Y89-0为捕收剂, 实现了对载金矿物(黄铁矿和砷黄铁矿)的选择性捕收。在磨矿细度-0.074 mm粒级占80%条件下, 采用一粗二精三扫闭路浮选流程, 在原矿金品位2.36 g/t时, 可获得精矿金品位36.08 g/t、回收率86.77%的良好指标。     

伊朗某金矿石选矿试验

伊朗某金矿石金品位为7.05 g/t,主要金矿物为裸露及半裸露金,主要载体矿物为黄铁矿,自然金的粒度变化范围很大,细粒明金(0.01~0.06 mm)占81.15%,微粒金占18.85%。为了确定该矿石的高效选矿工艺,进行了选矿试验研究。结果表明:(1)阶段磨矿、阶段选别工艺可以有效减少粗颗粒金在浮选过程中的跑尾,避免金矿物在磨矿中出现过粉碎,同时有利于不均匀细粒载金矿物单体解离。(2)跳汰机对-200目占65%的磨矿产品进行重选,可预先产出部分合格金精矿,充分体现了能收早收、分级分选理念。(3)矿石采用阶段磨矿—跳汰重选—阶段浮选工艺流程处理,可获得金品位为81.43 g/t、金回收率为45.52%的重选精矿,金品位为56.12 g/t、金回收率为44.99%的浮选精矿,综合精矿金品位为66.52 g/t,金回收率为90.51%。(4)金品位为0.74 g/t的重浮流程试验尾矿采用氰化浸出工艺处理,金浸出率达62.16%,最终浸出渣的金品位仅为0.28 g/t。     

低品位含金硫化矿选矿试验研究

根据矿石性质,采用混合浮选工艺流程处理某低品位含金硫化矿,在原矿金品位1.03 g/t的条件下,通过添加新型抑制剂DPS强化易浮细粒脉石的上浮和加强含金矿物的活化,大幅度提高了选矿试验指标,金品位由15.25 g/t提高到17.17 g/t,金回收率由91.96%提高到94.55%。     

乳化-絮凝对某金尾矿中微细粒金回收的影响

陕西小秦岭某浮选金尾矿中的金矿物粒度微细,主要以自然金和硫化物包裹金形式存在。为充分回收该尾矿中的金,并了解乳化-絮凝对微细粒金矿物的强化回收效果,进行了常规浮选和乳化-絮凝浮选工艺条件对比试验。结果表明,在矿浆浓度为25%、石灰用量为120 g/t、丁基黄药为100 g/t、2#油为12 g/t的情况下1次常规浮选,可获得金品位为14.00 g/t、金回收率为34.50%的金精矿;在矿浆浓度为25%、石灰用量为120 g/t、丁基黄药为60 g/t、2#油为12 g/t、乳化剂月桂酸皂用量为10 g/t、絮凝剂LR用量为20 g/t的情况下1次乳化-絮凝浮选,可获得金品位为17.31 g/t、金回收率为77.14%的金精矿。与常规浮选精矿指标相比,乳化-絮凝浮选在捕收剂丁基黄药用量下降40 g/t的情况下,金精矿金品位提高了3.31个百分点、金回收率提高了42.64个百分点,表明月桂酸皂乳化-LR絮凝可强化细粒金矿物的回收、大幅度地改善浮选精矿指标。     

从某金尾矿中回收金的探讨性试验

为综合回收某金尾矿中的有价金,在矿物性质研究的基础上,通过采用重选、氰化、浮选等选矿方法,探索性的研究综合回收尾矿中的有价金。试验结果表明:通过尼尔森选矿机选别,可以获得金回收率为20.27%,金品位为56.47 g/t的金精矿;通过浮选工艺流程,可以获得金品位为52.31 g/t的精矿,回收率达到28.59%;同时,为综合利用该类金尾矿二次资源提供了一定的参考借鉴。     

某金矿石选矿试验研究

对某金矿进行了选矿试验研究。原矿磨矿细度为-0.074 mm粒级占97.52%,采用碳酸钠、水玻璃、硫酸铜为调整剂,2^#油为起泡剂,丁铵黑药为捕收剂,通过一次粗选、两次扫选和两次精选闭路试验,获得了精矿金品位27.50 g/t、尾矿金品位0.15 g/t、精矿产率9.20%、金回收率94.89%的选别指标。     

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。