氰化浸出废水处理方法研究进展

本文介绍了氰化浸出废水的主要处理方法,将其归结为两类处理方法：1)直接分解破坏法;2)回收利用氰化物法。并结合氰化废水的特点对各种处理方法的优缺点分别进行了分析。各黄金生产企业可根据废水的实际性质和具体处理要求,选择合适的处理方法,可选择单一处理方法,也可选择几种上述方法进行联合处理。     

黄金选矿氰化废水处理的试验研究

黄金选矿全泥氰化工艺中氰化废水含有大量的有毒有害物质,未经处理的排放将对环境造成严重的污染。本试验采用碱性氯化法对含氰废水进行处理,分析了次氯酸钠投加量、pH值和反应时间等影响因素对处理效果的影响。确定了碱性氯化法处理氰化废水的最佳工艺参数,将为类似氰化废水处理提供借鉴。     

氰化提金废水的处理方法

简述了氰化提金废水的来源及成分,重点介绍了目前氰化提金废水的主要处理方法,并结合应用实例介绍了各方法的适用情况及优缺点。     

含砷氰化贫液综合处理工艺及应用

结合福建某黄金冶炼厂的生产实例进行了含砷氰化贫液综合处理工艺研究,结果表明：通过采用半酸化法与酸化法+碱氯氧化法+铁盐沉淀法组合工艺相结合的工艺处理含砷氰化贫液,可综合回收贫液中的氰根、铜等有价元素,实现废水综合治理的目的,该综合处理工艺取得了良好的经济效益和环境效益,具有较大的推广意义和应用前景。     

含砷氰化贫液综合处理工艺及应用

结合福建某黄金冶炼厂的生产实例进行了含砷氰化贫液综合处理工艺研究,结果表明：通过采用半酸化法与酸化法＋碱氯氧化法＋铁盐沉淀法组合工艺相结合的工艺处理含砷氰化贫液,可综合回收贫液中的氰根、铜等有价元素,实现废水综合治理的目的,该综合处理工艺取得了良好的经济效益和环境效益,具有较大的推广意义和应用前景。     

高硫高砷金精矿高压预氧化-氰化提金工艺研究

使用酸性高压预氧化-氰化提金的工艺方法,处理高硫高砷含有机碳的金精矿,使金的浸出率从10%提高到97%左右。为了优化工艺参数,对影响预氧化和氰化效果的因素进行了考查,同时也对预氧化后的含砷酸性废水的综合处理进行了研究。      

金渠金矿含氰污水处理技术的应用

介绍了酸化法、二氧化氯、半酸化法处理含氰废水的工作原理,以金渠金矿氰化厂为例,采用半酸化法和酸化法相结合的工艺处理含氰污水,回收污水中的氰化物和铜,实现了含氰污水零排放,既达到环保的目的又产生了一定的经济效益。     

金渠金矿含氰污水处理技术的应用

介绍了酸化法、二氧化氯、半酸化法处理含氰废水的工作原理,以金渠金矿氰化厂为例,采用半酸化法和酸化法相结合的工艺处理含氰污水,回收污水中的氰化物和铜,实现了含氰污水零排放,既达到环保的目的又产生了一定的经济效益。     

催化氧化法处理氰化废水

本文论述了催化氧化法处理氰化废水的工艺原理、优缺点及适用条件。从理论上分析了工艺条件对除氰效果的影响，并对今后的发展方向提出一些看法。     

氰化尾液中金银及CN~-再回收的可行性研究与实践

采用炭浆法吸附生产的金矿选厂,其排出的大量氰化尾浆中还含有金、银及CN-。若有充足的时间,在氰化尾浆中就有0.05～0.10g/m3的金和0.08～0.37g/m3的银被浸出,这部分的金银络合物必然还没有被活性炭吸附。经分离后,对氰化尾液进行酸化处理,再进行活性炭吸附回收金银。利用氰化尾液中的CN-离子,可实现闭路全循环,达到含氰废水的零排放。     

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