从含碲金矿中综合回收金、银、碲的试验研究

对河南某含碲金矿石进行了尼尔森重选单因素试验和重选尾矿再浮选试验。在磨矿细度-0.074 mm粒级占60%、给矿浓度25%、离心力强度50g、给矿速度900 g/min条件下获得重选精矿,在磨矿细度-0.074 mm粒级占70%、矿浆pH值为8、捕收剂异戊基黄药用量120 g/t条件下对重选尾矿进行一粗一扫浮选,重选和浮选的合并精矿金、银、碲品位分别为32.88 g/t、39.94 g/t和94.35 g/t,金、银、碲总回收率达到了89.97%、86.48%和81.29%,实现了金、银、碲的有效回收。     

某高硫金矿综合回收浮选试验研究

某高硫型金矿石中的金矿物主要为自然金,金品位为3.50 g/t,并可综合回收银和硫.为实现该金矿资源的高效综合回收利用,在磨矿细度-0.075 mm占70％的条件下,采用金硫混合浮选—金硫分离—浮硫工艺流程,以丁基黄药与丁铵黑药为组合捕收剂,可获得金品位40.46 g/t、银品位52.38 g/t、金回收率95.62％...     

某含金汞冶炼渣浮选试验

某含金1.85 g/t的汞冶炼渣中金主要以游离微细金和硫化物包裹金的形式存在,对该二次资源进行了浮选回收金的试验研究。结果表明,在磨矿细度为-0.074 mm占80%的情况下,采用1粗2精2扫、中矿顺序返回流程处理该试样,可以获得金品位为28.65 g/t、回收率为68.45%的金精矿,导致金回收率不高的主要原因是金颗粒微细和被碳酸盐、褐铁矿、石英和硅酸盐等矿物包裹。     

提高河北某铅锌矿中伴生金回收率的试验研究

河北某铅锌矿原矿含铅0.32%、锌4.83%、金0.73g/t、银20.9g/t,属于低铅高锌型硫化铅锌矿。在工艺矿物学研究基础上,针对河北某铅锌矿伴生金回收率低这一问题,试验采用复合分散剂及合理、可行的工艺流程结构,实现了对矿石中伴生金矿物的有效回收。在磨矿细度-74μm占60%的条件下,采用铅锌优先浮选的工艺流程对矿石中的伴生金进行了回收,通过小型闭路试验获得的铅精矿中金品位为55.43g/t,金回收率达到了69.89%。     

李家湾铜矿工业试验获得好指标

<正> 李家湾铜矿是以铜、金为主的多金属矽卡岩热液矿床。选厂于1989年建成投产,日处理矿石量为500t。现场生产工艺流程为原矿磨矿细度55～60％-0.074mm,一粗一扫二精流程。1991～1992年5月平均生产指标为原矿品位:铜1.084％、金0.707g/t:银11.34g/t,铜精矿品位24.95％,铜回收率93.13％,金回收率76.76％,银回收率84.03％。我院于1992年6月在该矿进行了工业试验,采用现场生产流程。磨矿细度提高到65～70％-0.074mm,采用丁黄药和丁基铵黑药混合捕收剂、多段加药等项技术措施,当原矿品位为铜1.128％、金0.728g/t、银11.89g/t时,获得铜精矿品位25.975％、铜回收率95.82％,金回收率81.91％,银回收率     

组合捕收剂浮选低品位铜矿的试验研究

采用化学多元素分析、XRD和SEM-EDS等技术对该铜矿的矿物组成和微观结构进行表征,研究表明:该铜矿中主要的有价元素为铜和银,含量分别为0.31%、20.51 g/t;铜主要赋存于黄铜矿中,未发现银的独立矿物,银可以作为综合回收的对象。在工艺矿物学研究基础上,对铜矿进行了组合捕收剂浮选试验研究,通过磨矿细度试验,捕收剂种类、用量及配比试验,确定了磨矿细度为-0.074 mm占85%,BK320+Z-200组合作为捕收剂,综合用量为80 g/t,配比为3∶1。通过"一次粗选、一次扫选、三次精选"的浮选工艺流程,可获得铜、银品位分别为17.21%、652.47 g/t,回收率分别为77.65%、45.38%的含银铜精矿,实现了低品位铜矿中铜、银的有效回收利用。     

某金银矿石浮选—氰化联合流程选矿试验

某金银矿石含金4.80 g/t,含银565 g/t,金矿物主要为自然金,呈独立矿物形式存在,部分以显微或次显微状赋存于褐铁矿及石英中,裸露金占总金的72.29%,铁矿物和硅酸盐矿物包裹金分别占总金的22.08%和5.63%;银矿物主要以辉银矿形式存在,嵌布粒度较粗,硫化银占总银的91.33%,自然银和氯化银含量较低,分别仅占总银的6.55%和2.12%。为实现该金银矿的高效开发利用,进行了选矿试验。结果表明：矿石在磨矿细度为-0.074 mm占74.5%的情况下,采用1粗4精2扫、精选1尾矿精扫选后再返回的浮选流程处理,可获得金品位为77.19 g/t、银品位为11 302 g/t,金、银回收率分别为75.58%和94.02%的精矿;金、银品位分别为1.23 g/t和35.45 g/t的浮选尾矿在再磨细度为-0.043 mm占86%的情况下氰化浸出,浸渣金、银品位分别为0.10 g/t和17.88 g/t,金、银对浮选尾矿的浸出率分别为91.87%和49.56%,全流程金、银总回收率分别达98.01%和96.98%。     

四川康巴难选铜金银矿综合回收选矿试验研究

四川康巴某铜金银矿含金1.40 g/t、银55.2 g/t、铜0.46%,矿石性质复杂,属难选氧化矿。为综合回收其中的有价金属,开展了选矿试验研究工作。在工艺矿物学研究的基础上,确定采用优先浮选工艺,产品方案为金精矿和铜精矿。试验考察了磨矿细度、药剂制度及流程结构对浮选指标的影响,最终获得金精矿含金79.86 g/t,银3114.07 g/t,铜6.03%;铜精矿含铜35.49%,金12.31 g/t,银553.88g/t。金、银、铜的总回收率分别为81.66%,58.60%和50.58%,分选指标良好,达到综合回收的目的,可为类似矿石高效选别提供借鉴。     

国外某金矿矿石选矿试验研究

国外某金矿石金品位4.59 g/t,银含量为1.8 g/t。金矿物赋存状态较好,裸露程度较高,含有较多的颗粒金。采用重选工艺可以保证颗粒金的回收,获得金品位较高的重选精矿直接进入冶炼。在矿石性质基础上,对本矿石进行了重选—重选尾矿浸出和重选—浮选—浮选精矿浸出工艺两种工艺方案的对比试验,结果表明,重选—重选尾矿浸出的工艺方案选别效果更为理想。在磨矿细度为-0.074 mm占85.0%的条件下,重选获得的精矿金品位为865.61 g/t、金回收率为45.35%,尾矿金品位降至2.51 g/t;固定矿浆浓度40%、石灰用量4 kg/t、氰化钠用量3 kg/t、氰化时间48 h,对重选尾矿进行氰化浸出,金浸出率达到86.06%,重选—重选尾矿浸出工艺金综合回收率为92.38%。研究结果将为该矿石的工艺设计提供依据,指导实际生产。     

某金银矿石浮选—氰化联合流程选矿试验

某金银矿石含金4.80 g/t,含银565 g/t,金矿物主要为自然金,呈独立矿物形式存在,部分以显微或次显微状赋存于褐铁矿及石英中,裸露金占总金的72.29%,铁矿物和硅酸盐矿物包裹金分别占总金的22.08%和5.63%;银矿物主要以辉银矿形式存在,嵌布粒度较粗,硫化银占总银的91.33%,自然银和氯化银含量较低,分别仅占总银的6.55%和2.12%。为实现该金银矿的高效开发利用,进行了选矿试验。结果表明：矿石在磨矿细度为-0.074 mm占74.5%的情况下,采用1粗4精2扫、精选1尾矿精扫选后再返回的浮选流程处理,可获得金品位为77.19 g/t、银品位为11 302 g/t,金、银回收率分别为75.58%和94.02%的精矿;金、银品位分别为1.23 g/t和35.45 g/t的浮选尾矿在再磨细度为-0.043 mm占86%的情况下氰化浸出,浸渣金、银品位分别为0.10 g/t和17.88 g/t,金、银对浮选尾矿的浸出率分别为91.87%和49.56%,全流程金、银总回收率分别达98.01%和96.98%。     

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