高杂质铜阳极泥预处理的工艺研究

以江铜集团贵溪冶炼厂的高含量杂质铜阳极泥作为原料,采用加压酸浸的方法对该铜阳极泥进行预处理,对铜、砷、碲、锑、铋、锡等杂质元素和贵金属银的浸出进行了研究。结果表明,该方法可以将铜、砷、铋较完全脱除,碲、锑大部分脱除,锡部分脱除,而贵金属银基本没有损失。     

铜阳极泥预处理工艺优化

对高杂质铜阳极泥在酸性介质中的预处理脱杂工艺进行了研究。结果表明:控制一定的酸度和氯离子浓度,阳极泥中的金、银等贵金属得到进一步富集,而其中的铜、锑、铋等杂质可以有效脱除,脱除率分别为46 5%、65%和85%,预处理渣率为55%。该工艺应用于生产实践,取得良好效果。     

铅阳极泥湿法预处理综合回收新工艺

研究铅阳极泥湿法预处理综合回收新工艺：铅阳极泥经过自然堆放氧化后,在硫酸介质中控电位氧化氯化浸出,能有效地实现贵金属与非贵金属的分离。浸出液经过冷却结晶,析出部分砷,其他有价元素留在溶液中。后通过控电位的方法还原沉碲,碲的回收率为96.52%。将沉碲后液依次进行水解沉锑、铁粉还原沉铋铜,锑、铋、砷的回收率均大于91%。该工艺流程简单,无废气产生,中间产物渣不产生堆放污染,可直接进入株冶原有火法系统进一步精炼回收有价金属,终端还原后液可循环使用。     

分银渣中有价金属高效回收利用

以锡、铅及砷含量较高的分银渣为原料, 研究了高效回收锡、铅、砷、锑等有价金属的工艺流程。采用分银渣制团-高温脱砷锑-还原熔炼-硅氟酸电解工艺, 考察了还原剂种类、还原剂加入量以及MeS加入量对高温脱砷锑过程的影响, 结果表明: 当还原剂R1加入量为8.8%, MeS加入量为2.4%时, 高温处理团矿后锡回收率达到87.64%, 脱砷锑效果好。经硅氟酸电解, 锡、铅以铅锡焊料形式回收, 锑以锑氧形式脱除, 银、铋等富集进入阳极泥。     

某铅锌冶炼厂铅阳极泥湿法预处理新工艺

铅阳极泥经过自然堆放氧化后,在硫酸介质中控电位氧化氯化浸出,能有效地实现贵金属与其他元素的分离。浸出液经过冷却结晶,析出部分砷,其他有价元素留在溶液中。后通过控电位还原沉碲,碲的回收率为96.52%。将沉碲后液依次进行水解沉锑、铁粉还原沉铋铜,锑、铋、砷的回收率均大于91%。工艺流程简单,无废气产生,中间产物渣不产生堆放污染,可直接进入原有火法系统进一步精炼回收有价金属,终端还原后液可循环使用。     

锡盐共沉淀法净化铜电解液工艺研究

采用锡盐共沉淀法从铜电解液中脱除砷、锑、铋,考察了锡价态、反应温度、锡用量、反应时间和溶液酸度等因素对杂质脱除效果的影响。结果表明,硫酸浓度174.04 g/L、铜浓度48.14 g/L、砷浓度16.54 g/L、锑浓度96.77 mg/L、铋浓度44.24 mg/L的电解液中加入锡盐,当净化条件为Sn(Ⅳ)/As质量比1.0、温度80 ℃、搅拌速度500 r/min、反应时间30 min时,As、Sb和Bi脱除率分别达到82.54%、86.63%和98.39%,而Cu和Ni损失率均小于0.2%。     

某富含金银阳极泥矿的工艺矿物学研究

采用XRF、XRD、粒度仪分析、扫描电镜分析等分析方法对某富含金银阳极泥矿的成分、粒度、物相等进行了研究。结果表明:此阳极泥矿粒度细、结构复杂,富含金、银,总含量达到10.42%,主要有色金属为铜、铅,含量分别为17.26%、13.28%;阳极泥矿中金主要以金银合金的形式存在,少部分包裹在硒化铜及硫酸铅中并伴随少量的银、锑等元素;银主要以硒化银、硒酸化银、铜银硒、金银合金及包裹在硫酸铜或者硫酸铅中形成共生化合物等形式存在;铜主要以硫酸铜化合物形式存在,硫酸铜是阳极泥矿的基底,并附存大量的其它杂质元素;铅主要以硫酸铅、硫酸铅钡、砷酸锑铅并伴有锑、金、银、砷等元素的形式存在。除此之外,阳极泥矿中还含有硫酸钡、硫酸锑等化合物。通过分析此阳极泥矿中金、银元素及主要杂质元素铜、铅的成分与赋存状态,为制定高效提取金、银的工艺流程奠定了基础。      

再生铜过程短流程制备铅锡锑合金材料的研究

以再生铜过程中铜阳极泥分银渣为原料,采用还原熔炼一电解短流程工艺直接制取铅锡锑合金,调节该合金成分可制造巴氏合金材料.还原熔炼过程中铅回收率为95.92%,锡回收率为92.47%,锑回收率为95.80%;电解过程中电解阴极产物铅的直收率为95.78%、锡的直收率为84.51%、锑的直收率为83.81%;此外,阳极泥中富集了分银渣中95%以上的贵金属.     

铅阳极泥的化学选矿研究

<正> 目前,处理铅阳极泥均采用火法。该工艺复杂,流程长,金银一次直接回收率低(一般在75～85%),铜、铋、铅的综合利用程度差,并产生砷、锑、铅氧化物,污染环境。为此,我们对韶关冶炼厂铅阳极泥采用化学选矿工艺进行研究。基本消除了砷、锑、铅氧化物的污染,提高了银的一次直接     

加压酸浸预处理铜阳极泥的工艺研究

以国内某铜冶炼厂所产的铜阳极泥为原料, 采用加压酸浸的方法对该铜阳极泥进行预处理, 对铜阳极泥中铜、碲、硒等元素的浸出行为进行了研究。结果表明, 该方法能达到铜的较完全脱除及碲、硒的部分脱除, 银在浸出过程中基本没有损失。     

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。