内蒙古某金矿石重选—浮选联合工艺试验

内蒙古某金矿石金品位为 2. 83 g/t,由于原有氰化浸出工艺所 产生的尾渣对环境具有较大污染,因此现 阶段寻求一种绿色清洁的选矿方法至关重要。 基于矿石中金的嵌布特征, 开展了尼尔森重选—浮选联合工艺试验研 究。 结果表明:在磨矿细度为-0. 043 mm 占 87%、重力倍数为 80 G、流 态化水量为 3 L/min 的条件下进行尼尔森重选, 可以获得金品位为 35. 44 g/t、金回收率为 55. 85%的重选金精矿和 金品位为 1. 34 g/t 的重选尾矿,对重选尾矿进行 2 粗 2 精 2 扫、中矿顺序返回的闭路浮选,可以获得金品位为 13. 80 g/ t、金回收率为 31. 38%的浮选金精矿。 矿石经尼 尔森重选—浮选联合工艺处理后,获得了金总回收率为 87. 24%、金品位为 22. 69 g/t,尾矿金品位为 0. 42 g/t 的指标。 研究结果对于选厂的无氰选金工艺推广具有重要的参考价值。     

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。     

某石英脉型微细粒嵌布低品位金矿石选矿试验

为了给某石英脉型微细粒嵌布低品位金矿石的开发利用提供依据,根据矿石性质,采用浮选-浮选尾矿氰化浸出-浮选精矿焙烧后氰化浸出工艺流程进行了选矿试验。结果表明：浮选-尾矿氰化浸出可获得金品位为61.88 g/t、砷含量为4.21%、金回收率为77.57%的金精矿和作业金浸出率为75.85%、对原矿金回收率为17.02%的尾矿浸出液,两者的金回收率合计达到94.59%。金精矿经焙烧预处理,焙砂砷含量降到0.38%、金品位提高到88.40 g/t;焙砂氰化浸出的作业金浸出率达93.28%、对原矿金回收率为72.36%,金精矿焙砂和浮选尾矿氰化浸出的综合金回收率为89.38%。     

某难处理金矿石选冶工艺研究

为了给某难处理金矿石的开发提供技术依据,对其进行了详尽的选冶工艺试验研究。结果表明：采用单一浮选工艺处理该矿石,在-200目占80%的磨矿细度下,可以获得金品位为57.32 g/t、金回收率为84.00%的金精矿;采用浮选-尾矿氰化浸出工艺处理该矿石,可以先在-200目占70%的磨矿细度下获得金品位为60.09 g/t、金回收率为82.26%金精矿,然后在-200目占90%的再磨细度下获得金浸出率为10.70%的浸出液,金的总回收率达92.96%。根据试验结果,推荐采用浮选-尾矿氰化浸出工艺。     

某高硫含砷碳低品位难处理金矿选矿试验研究

某低品位金矿石原矿含金1.68 g/t,砷0.43%、碳0.40%、硫3.20%,金以显微或次显微形式浸染于毒砂、黄铁矿、褐铁矿中,具有载金矿物粒度细、砷和碳含量高等特点,是典型的低品位含砷碳极难处理 金矿石,严重影响金的浮选指标。为回收利用矿石中的金,分别进行了直接全泥氰化浸出、重选、浮选三种方案对比试验研究。结果表明,直接全泥氰化浸出率仅5%,重选金精矿回收率不足10%,浮选可获得金品位 15.04 g/t、回收率77.13%的金精矿。由于浮选金精矿含砷、碳、硫有害元素均较高,浮选尾矿含金0.42 g/t,损失较高,因此试验采用焙烧预处理以脱除金精矿和尾矿中的有害元素,然后焙砂氰化浸出回收金。最终 试验采用浮选—金精矿焙烧氰化浸出—尾矿焙烧氰化浸出联合工艺,得到金总回收率70.66%的较好指标,有效地回收了矿石中的金。     

某高硫含砷碳低品位难处理金矿选矿试验研究

某低品位金矿石原矿含金1.68 g/t,砷0.43%、碳0.40%、硫3.20%,金以显微或次显微形式浸染于毒砂、黄铁矿、褐铁矿中,具有载金矿物粒度细、砷和碳含量高等特点,是典型的低品位含砷碳极难处理 金矿石,严重影响金的浮选指标。为回收利用矿石中的金,分别进行了直接全泥氰化浸出、重选、浮选三种方案对比试验研究。结果表明,直接全泥氰化浸出率仅5%,重选金精矿回收率不足10%,浮选可获得金品位 15.04 g/t、回收率77.13%的金精矿。由于浮选金精矿含砷、碳、硫有害元素均较高,浮选尾矿含金0.42 g/t,损失较高,因此试验采用焙烧预处理以脱除金精矿和尾矿中的有害元素,然后焙砂氰化浸出回收金。最终 试验采用浮选—金精矿焙烧氰化浸出—尾矿焙烧氰化浸出联合工艺,得到金总回收率70.66%的较好指标,有效地回收了矿石中的金。     

西藏某石英脉型金矿选矿试验研究

西藏某石英脉金矿主要载金矿物为银金矿,嵌布粒度较细且不均匀,金品位3.22g/t,为主要回收元素,银品位19.50g/t,为可综合回收元素。针对矿石性质,采用浮选-浮选尾矿氰化浸出联合工艺流程对矿石中的金进行回收。经一粗一精二扫、中矿顺序返回的闭路浮选流程,可获得浮选金精矿含金95.81g/t、金回收率84.34%的指标;浮选尾矿进行氰化浸出,金作业浸出率为79.31%,对原矿回收率为12.42%。联合工艺最终获得金总回收率96.76%的指标。其中浮选金精矿中银品位为407.01g/t、金尾矿中银品位为5.97g/t、精矿银回收率为68.78%,氰化浸出作业中银作业浸出率为51.53%,对原矿浸出率为15.98%,银综合回收率为84.76%。     

哥伦比亚某含铜金银矿石选冶联合工艺研究

哥伦比亚某含铜金银矿矿石中有价元素金、银、铜含量分别为7.61 g/t、44.62 g/t和0.10％.原采用重选—重选尾矿直接氰化浸出工艺,银浸出率低、铜大量浸出,贵液后续处理困难.针对以上问题,采用重选—重选尾矿优先浮铜—浮铜尾矿浮选金银—金银精矿氰化浸出的选冶联合工艺开展试验研究.结果表明:①该矿石中硫化矿物主要为黄铁矿,含金矿物以银金矿为主,含银矿物主要为锑黝铜矿,铜矿物主要为黄铜矿.②矿石采用两段尼尔森重选—超级选金机精选的重选工艺,可获得综合重选金精矿含金34.10 kg/t、含银9.34 kg/t、含铜0.072％,金回收率44.56％,银回收率2.06％、铜回收率0.0066％.③对重选尾矿采用优先浮铜工艺,在磨矿细度为-74μm占64％的条件下,以Na2CO3为调整剂、Z-200为捕收剂,经2粗2精,可获得铜品位24.47％、金品位402.4 g/t、银品位8841.6 g/t、铜回收率63.92％、金回收率25.62％、银回收率55.96％的铜精矿.④采用选冶联合工艺流程处理该矿石,全流程试验可获得金综合回收率88.21％、银综合回收率77.02％、铜回收率63.92％的指标.不仅回收了铜矿物,降低了铜浸出量和氰化钠单耗,还改善了贵液后续处理过程.同时,银综合回收率提升明显,极大降低了氰化尾渣的处理量.     

哥伦比亚某含铜金银矿石选冶联合工艺研究

哥伦比亚某含铜金银矿矿石中有价元素金、银、铜含量分别为7.61 g/t、44.62 g/t和0.10％.原采用重选—重选尾矿直接氰化浸出工艺,银浸出率低、铜大量浸出,贵液后续处理困难.针对以上问题,采用重选—重选尾矿优先浮铜—浮铜尾矿浮选金银—金银精矿氰化浸出的选冶联合工艺开展试验研究.结果表明:①该矿石中硫化矿物主要为黄铁矿,含金矿物以银金矿为主,含银矿物主要为锑黝铜矿,铜矿物主要为黄铜矿.②矿石采用两段尼尔森重选—超级选金机精选的重选工艺,可获得综合重选金精矿含金34.10 kg/t、含银9.34 kg/t、含铜0.072％,金回收率44.56％,银回收率2.06％、铜回收率0.0066％.③对重选尾矿采用优先浮铜工艺,在磨矿细度为-74μm占64％的条件下,以Na2CO3为调整剂、Z-200为捕收剂,经2粗2精,可获得铜品位24.47％、金品位402.4 g/t、银品位8841.6 g/t、铜回收率63.92％、金回收率25.62％、银回收率55.96％的铜精矿.④采用选冶联合工艺流程处理该矿石,全流程试验可获得金综合回收率88.21％、银综合回收率77.02％、铜回收率63.92％的指标.不仅回收了铜矿物,降低了铜浸出量和氰化钠单耗,还改善了贵液后续处理过程.同时,银综合回收率提升明显,极大降低了氰化尾渣的处理量.     

缅甸某金矿重选-浸出选矿试验研究

鉴于缅甸某金矿性质及当地矿山实际情况,开展了尼尔森重选-尾矿氰化浸出试验条件研究。结果表明,当采用三段不同磨矿细度,三段尼尔森GRG重选流程,可得到金品位为292.91 g/t、回收率为59.86%的重砂精矿,以及金品位为6.45 g/t、回收率为40.14%重选尾矿,同时也节约了磨矿成本。重选尾矿氰化浸出较佳条件为磨矿细度-0.045 mm 78%、矿浆浓度40%、石灰用量1.5 kg/t、氰化钠用量4.0 kg/t、浸出20 h,金作业回收率为93.18%。采用尼尔森重选-尾矿氰化浸出联合流程,金的总回收率可达到97.26%。     

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     

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     

2014 second batch of rare earth quota released

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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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.