某氧化铜矿石硫化浮选试验

某氧化铜矿石铜品位为3.99%,氧化率73.5%,铜主要以自由氧化铜的形式存在。采用优先浮硫化铜再浮氧化铜的原则流程回收铜,对硫化铜浮选尾矿开展氧化铜硫化浮选试验。以硫化钠为硫化剂,戊基黄药为捕收剂,2#油为起泡剂,进行1粗1精氧化铜矿硫化钠用量、强化硫化药剂、分段加药浮选试验和氧化铜浮选尾矿强磁选试验。结果表明,硫化钠用量为1 500 g/t,不采用强化硫化药剂,分两次加药、加药量比为3∶1时,磁场强度为1 240 k A/m时,浮选效果最佳。在该条件下进行全流程闭路试验,最终可获得铜位40.79%、回收率36.37%的氧化铜精矿1,铜品位17.62%、回收率16.40%的氧化铜精矿2和铜品位4.11%、回收率3.88%的磁选精矿。试验结果可为该氧化铜矿石铜回收工艺的确定提供技术参考。     

某氧硫混合型铜矿浮选工艺研究

为了实现某氧硫混合型铜矿的高效回收,产出合格的硫化铜精矿和氧化铜精矿。根据矿石性质和浮选工艺特点,采用先浮选硫化铜矿物,然后在硫化条件下浮选氧化铜矿物的选矿原则流程。针对该流程,分别开展了硫化铜矿物和氧化铜矿物的浮选条件试验,获得了最佳工艺参数,并进行了浮选闭路试验。试验结果表明,以丁基黄药和Z-200的组合作为硫化铜物的捕收剂,以NaHS作为氧化铜矿物的硫化剂、戊基黄药作为氧化铜物的捕收剂,硫化铜矿物浮选采用一粗两扫两精的选别流程,氧化铜矿物浮选采用一粗两扫两精+两精扫的选别流程,可以获得Cu品位为22.72%、Cu回收率为64.12%的硫化铜精矿和Cu品位为25.15%,Cu回收率为20.00%的氧化铜精矿,研究结果为同类型的铜矿开发提供了数据支持和技术参考。     

云南某氧化铜矿石选矿试验

云南某难选氧化铜矿石氧化程度高、泥化严重,有用矿物嵌布粒度粗细不均,其中硫化铜矿嵌布粒度较粗。按先浮硫化铜矿物,再浮氧化铜矿物的原则流程进行了选矿工艺技术条件研究。结果表明,氧化铜矿物采用分级分选工艺可以有效解决矿泥通过中矿返回不断循环、积累的问题;闭路流程最终获得了铜品位为21.43%、回收率为47.73%的硫化铜精矿和铜品位为17.41%、回收率为19.39%的氧化铜精矿,综合精矿的铜品位为20.09%、回收率为67.12%。     

四川某氧化铜矿石选矿试验研究

四川某氧化铜矿石因氧化程度深、结合氧化铜占有率高而难选。对该矿石采用先浮选硫化铜矿物,再硫化浮选氧化铜矿物的工艺流程进行试验,并在氧化铜矿物浮选过程中辅以脱泥手段,有效地回收了铜矿物,同时使少量伴生贵金属银得到了富集,所得铜精矿铜品位为19.88%,铜回收率为64.22%,含银72.96 g/t。     

内蒙古某铜矿选矿试验

内蒙古某铜矿原矿含铜1.28%,铜品位较高,但氧化严重,氧化率高达76.07%,属于高氧化铜矿。原矿中氧化铜矿物主要为孔雀石,硫化铜矿物主要为辉铜矿和黄铜矿。为综合利用资源,针对矿石性质,进行了详细的条件试验,最终确定采用"先浮硫化矿后硫化浮选氧化矿"的工艺流程,获得了良好的分选指标。全流程闭路试验获得了含铜28.68%、回收率20.65%的硫化铜精矿以及含铜16.82%、回收率52.38%的氧化铜精矿,总铜精矿含铜19.05%、回收率73.03%,对该类资源的综合利用提供了一定的参考依据。     

西藏某难处理氧化铜矿石浮选试验

西藏某铜矿石为高氧化率、嵌布粒度细、脉石矿物易泥化的难选氧化铜矿石,铜品位为1.76%,铜氧化率高达44.32%。根据矿石性质的特点,采用硫化铜矿物和氧化铜矿物分步浮选-混合精选流程进行了浮选试验。结果表明,矿石在磨矿细度为-0.074 mm占85%情况下,以水玻璃为矿泥的抑制剂和分散剂、戊基黄药为捕收剂、硫化钠为氧化铜矿物的硫化剂、硫酸铵为辅助活化剂、松醇油为起泡剂,通过2粗2精2扫流程处理,获得了铜品位为21.19%,铜回收率为78.74%的铜精矿。     

云南某难选氧化铜矿浮-磁联合选矿试验

为高效回收利用铜品位为1.28%的云南某氧化铜矿,根据原矿高氧化率、高结合率、嵌布粒度细的特点及不同含铜矿物可浮性和磁性的差异,试验研究采用先浮硫化铜后浮氧化铜-浮选尾矿强磁选的原则工艺流程。试验结果表明：在磨矿细度为-0.074 mm 84.5%的条件下,进行硫化铜1粗1扫2精浮硫化铜矿,硫化铜浮选尾矿再进行1粗3扫3精浮氧化铜矿,浮选尾矿通过磁选综合回收铜工艺,最终获得的硫化铜精矿铜品位为24.75%,铜回收率为33.03%;获得的氧化铜精矿铜品位为16.12%,回收率为39.25%;获得的磁选精矿铜品位为9.71%,铜回收率为12.50%;总精矿铜品位为16.77%,总铜回收率为84.78%,获得了满意的试验指标。      

云南某低品位硫氧混合铜矿浮选试验研究

云南某低品位硫氧混合铜矿铜含量为1.03%,是主要有价金属,其中硫化铜占有率为71.67%,氧化铜占有率为28.33%,二氧化硅和氧化钙含量分别为43.26%和12.66%,硅酸盐和碳酸盐是主要的脉石矿物。通过系统的试验研究,确定采用异步浮选—分段硫化工艺,先选硫化铜再选氧化铜,硫化铜浮选采用丁基黄药作为捕收剂,石灰作为精选抑制剂,氧化铜浮选采用丁基黄药+丁铵黑药作为捕收剂,硫化钠为硫化剂,CMC作为精选抑制剂。两段粗选作业均不加抑制剂保证铜回收率,精选作业加入抑制剂提高铜品位,最终可获得铜品位为18.95%,铜回收率为66.27%的硫化铜精矿和铜品位为20.11%,铜回收率为19.87%的氧化铜精矿,铜总回收率为86.14%。     

西藏某铜矿选矿试验研究

对西藏某铜矿进行了浮选-浸出试验研究,采用先浮选硫化铜矿、后浮选氧化铜矿并在氧化铜矿浮选中添加少量辅助捕收剂YQC-64的工艺流程,可取得硫化铜精矿品位33.83%、氧化铜精矿品位16.84%、总精矿铜品位28.17%、总回收率87.06%的浮选指标。浮选尾矿用硫酸浸出,浸渣品位可降至0.11%。试验结果表明,该工艺较充分有效地回收了铜资源。     

西藏某低品位氧化铜矿选矿试验研究

西藏某低品位氧化铜矿是一高氧化率的氧化铜矿。原矿含铜1.14%,其中氧化铜占其总铜量的92.7%。矿石中可选含铜矿物主要为孔雀石和赤铜矿。选矿试验结果表明,采用硫化浮选法,可获得含铜25.35%,回收率73.91%的铜精矿,选别效果较好。     

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。