福建川石金矿浮选试验研究及生产实践

福建川石金矿选矿厂前期采用常规浮选工艺生产金精矿,浮选采用一次粗选、三次精选、四次扫选工艺流程,丁基铵黑药和丁基黄药作为捕收剂、松醇油为起泡剂、硫酸铜为活化剂、石灰用作p H值调整剂,选矿厂尾矿中金品位为0.82g/t,金选矿回收率为61.87%。经过工艺流程的优化,调整为一次粗选、两次精选、三次扫选,捕收剂丁基铵黑药30 g/t,丁基黄药100 g/t,起泡剂松醇油30 g/t、SC 15 g/t。最终选矿厂尾矿中金品位降至0.28 g/t,金的回收率为87.32%,年增加经济效益可达1 259.42万元。     

西宁某低品位铜矿选矿试验研究

对西宁某原生铜矿石进行了选矿试验研究。通过对浮选指标各影响因素的优化,得出了适合铜矿石粗选的最佳工艺条件:磨矿细度70%-74μm的条件下,活化剂Na2S用量120 g/t,组合捕收剂异丙基黄药和丁基铵黑药分别为45、15 g/t,起泡剂11号油23 g/t。在此条件下进行两次扫选,混合精矿进行铜硫分离、再经过三次精选和两次扫选实验室闭路试验,可获得铜精矿品位为18.16%、回收率为86.21%,硫精矿品位为30.12%、回收率为82.07%的较好实验室闭路试验指标。     

提高某难选金矿石金精矿品位的浮选试验研究

某难选金矿石含金1.97 g/t,矿物组分复杂,独立金矿物嵌布粒度细,主要载金矿物黄铁矿嵌布粒度粗细不均,同一种矿物少部分是载金矿物而大部分为不含金矿物,导致金精矿不含金杂质矿物含量高,金精矿品位较低。为提高该金精矿品位,采用高效捕收剂MA与丁基铵黑药组合,金精选添加适量的分散剂六偏磷酸钠,通过一次粗选、两次精选、两次扫选的闭路试验流程,最终获得金精矿含金50.51 g/t、含银1 180.8 g/t,金回收率为93.96%、银回收率为90.13%。金精矿中金品位得到有效提高。     

陕西蔡川铜矿含金铜尾矿中金的回收

在工艺矿物学研究的基础上对含金0.084 g/t、硫2.74%的陕西蔡川铜尾矿进行了金的强化回收技术研究。结果表明,含金铜尾矿经过一次粗选、一次精选、一次扫选闭路流程可获得硫品位43.34%、回收率44.30%的硫精矿,其中金品位为1.26 g/t、回收率为42.06%,达到计价标准。另外矿石中的银和镓元素也得到了一定程度的回收。理论分析结果显示,组合药剂的使用可大幅度提高含金矿物的选别效果,Y-89和丁基铵黑药的组合属于正—负型协同药剂,药剂基团中硫原子的Mulliken电荷分布是影响捕收剂选别性能的关键因素。     

含金铜尾矿中金的回收技术研究

在工艺矿物学研究的基础上对含金0.084g/t,硫2.74%的铜尾矿进行了金的强化回收技术研究。研究结果表明,含金铜尾矿经过一次粗选、一次精选、一次扫选闭路流程可获得硫品位为43.34%,回收率为44.30%的硫精矿,其中金品位为1.26 g/t、回收率为42.06%,达到硫精矿计价标准。理论分析显示,组合药剂的使用可大幅度提高含金矿物的选别效果,Y-89和丁铵黑药的组合属于正-负型协同药剂,药剂基团中硫原子的Mulliken电荷分布是影响捕收剂选别性能的关键因素。     

提高金浮选回收率的研究

针对矿石性质 ,采用 3 8号捕收剂与丁基铵黑药 3∶2配成混合捕收剂 ,松醇油作起泡剂 ,磨矿细度 -74μm 66.66% ,工艺流程为一次粗选、一次精选、一次扫选或一次粗选、两次精选、一次扫选 ,获得金精矿产率大于3 .3 2 % ,品位大于 65 .70 g/t,回收率大于 93 .48% ,实现提高金浮选回收率的目的。     

安徽某高硫金矿选矿试验

安徽某含砷高硫低品位金矿石,有价元素为金和硫,为了合理开发利用该矿产资源,试验采用抑硫浮金工艺流程进行选矿试验研究。试验选取石灰作为硫化物抑制剂,以丁基黄药和丁铵黑药组合药剂为捕收剂,在磨矿细度为-0.074 mm 75%的条件下,通过1次粗选、3次精选和2次扫选,最终获得了金精矿品位为25.32 g/t、金回收率为68.52%的满意指标。     

从莱山金矿浮选回收金的研究

采用常规的硫化浮选工艺,从含金的氧化矿中回收金.研究了磨矿细度、硫化钠、碳酸钠、丁基黄药及丁基铵黑药用量对回收金的影响.结果表明,过量的硫化钠对金有抑制作用,采用丁基黄药和丁基铵黑药混合捕收剂能提高金的回收率.在磨矿细度为89.52%-0.074 mm、原矿金品位为5.56 g/t的条件下,经一粗二精二扫选别.可获得金精矿品位为105.9 g/t,金回收率为85.27%的选别指标.     

云南某氧化铜浮选试验研究

对云南某氧化铜矿进行浮选试验研究。原矿含Cu 1.60%,含Ag 68.20g/t,铜氧化率为93.92%,属于氧化铜矿石,原矿组成复杂,主要的铜矿物有孔雀石、蓝铜矿等,主要脉石矿物为石英、白云石。试验方案采用优选硫化铜后浮选氧化铜工艺流程,结果表明,在磨矿细度为-74μm含量65%,丁基黄药和丁基铵黑药为捕收剂,硫化钠和水玻璃为调整剂,松醇油为起泡剂的条件下,经两次粗选、一次扫选、两次精选的浮选流程获得铜精矿Cu品位26.68%,Cu回收率94.12%,Ag品位1 094.46g/t,Ag回收率94.04%的良好试验指标。     

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。