硫化锑精矿全湿法清洁提取工艺

为解决现行湿法炼锑过程中废水量大、电流效率低、设备腐蚀的问题,提出一种全湿法清洁炼锑新工艺。采用"三氯化铁浸出—铁粉置换—隔膜电积铁"的工艺路线进行硫化锑精矿的清洁提取。首先,采用隔膜电积法制备了三氯化铁浸出液,获得优化实验条件为:电流强度为300A/m~2、电解液温度为40℃,此时,阴阳极电流效率均在99%以上;其次,以电积时阳极得到的三氯化铁溶液为浸出剂经两段浸出硫化锑精矿,获得了96.56%的锑浸出率,该过程选择性高;最后,以铁粉进行氯化锑浸出液的置换,经两次置换,93.89%的锑被置换出。工艺操作简单、试剂消耗少,具有良好的工业应用前景。     

硫化锑精矿的湿法冶金

自1965年以来,锡矿山矿务局采用硫化钠碱性溶剂浸出硫化锑精矿回收锑,进行了实验室、扩大及半工业试验,年产约40吨阴极锑的半工业试验结果表明,锑的浸出率超过99.5%,隔膜电积锑的电流效率82～85%,锑的冶炼总回收率在97%以上,阴极锑经熔铸后产出含锑99.6%以上的精锑。废阴极液经冷冻结晶产出 Na_2 S·9H_2 O晶体,进一步浓缩脱水产出纯度63.5%的工业硫化钠。硫的利用率80%左右。母液可返回浸出工序。     

氧化锌精矿浸出液中脂肪酸有机物脱除的试验研究

氧化锌矿物的常用捕收剂为有机胺或脂肪酸,浮选过程中捕收剂吸附在矿物表面进入精矿。氧化锌精矿湿法浸出过程中,矿物表面的捕收剂随浸出过程进入浸出液中,严重影响氧化锌浸出液的电积过程。为了消除浮选过程捕收剂等有机物对氧化锌浸出液电积过程的影响,考察了活性炭吸附法、混凝—沉降法以及气浮法3种方法对脱除浸出液中的有机杂质的影响,并对这3种方法的除杂效果进行了对比。试验结果表明,3种方法中气浮法效果最好,气浮法净化浸出液可使油酸钠脱除率达81.76%,Zn2+保留率高达96.25%,达到最佳除杂效果。     

老挝某混合铜矿石选铜试验

老挝某混合铜矿石有价元素主要为铜。采用1粗2精2扫工艺处理该矿石,获得了铜品位为41.84%、回收率为85.14%的精矿;尾矿在硫酸溶液初始浓度为30 g/L、液固比3∶1、时间为60 min条件下浸出后,浸出液铜作业回收率为81.25%,浸出液经置换工艺处理后,可以获得回收率为98.92%的海绵铜。应用浮选—浸出—置换工艺处理该矿石,铜的总回收率达97.08%。     

利用脆硫锑铅矿制备合格锑白的新工艺研究

采用硫化钠浸出脆硫铅锑矿, 浸出液通入二氧化硫气体沉淀出硫化锑中间体, 再将硫化锑沉淀在炉中氧化, 产出符合国家标准的合格锑白。最佳工艺条件为:温度90 ℃, 时间3 h, 搅拌速度250 r/min, 液固比2∶1, 硫化钠与锑质量比为2.8, 氢氧化钠与锑质量比为0.3, 该条件下锑浸出率达92.5%。将二氧化硫气体通入浸出液并控制终点pH值为5~6, 锑沉淀率不低于99%, 产出的硫化锑含Sb 65%、S含量不高于30%、As含量不高于0.02%。硫化锑在980～1 000 ℃下熔化, 鼓入两路风氧化, 产出的锑白产品达到国家一级标准。     

湿法提铜工艺在灵宝黄金股份公司的应用与发展

综述了萃取电积湿法提铜工艺在灵宝黄金股份有限公司的应用与发展历程,积累出了一整套焙烧—浸出—溶剂萃取—电积—氰化处理铜金精矿的经验。通过结合国外成熟技术经验,对溶剂萃取电积铜工艺不断技术改造和革新,将传统的金精矿焙烧工艺与溶剂萃取技术回收铜相结合,证明该工艺在实践和技术经济方面的可行性。     

湿法提铜工艺在灵宝黄金股份公司的应用与发展

综述了萃取电积湿法提铜工艺在灵宝黄金股份有限公司的应用与发展历程,积累出了一整套焙烧—浸出—溶剂萃取—电积—氰化处理铜金精矿的经验。通过结合国外成熟技术经验,对溶剂萃取电积铜工艺不断技术改造和革新,将传统的金精矿焙烧工艺与溶剂萃取技术回收铜相结合,证明该工艺在实践和技术经济方面的可行性。     

从铋碲精矿分离回收铋碲的新工艺

对铋碲精矿的处理 ,传统的方法是火法冶炼。采用湿法冶金工艺 ,直接分离并回收铋碲 ,在国内尚未见报道。试验以某地浮选产出的铋碲精矿为原料 ,采用氧化浸出—还原—置换的湿法分离回收工艺 ,获得铋碲产品总回收率分别为 96.93%和 81.70 % ,达到了分离提取的目的 ,为铋碲精矿的分离回收利用提供了新的途径     

辉锑矿氯化浸出制取焦锑酸钠的工艺研究

研究以辉锑精矿为原料、经氯化浸出-氧化-水解-加碱合成制取焦锑酸钠的工艺。浸出过程中加入氯气的质量为浸出原矿质量的90％时，锑浸出率大于98％。浸出液中加入少量双氧水或液氯进行氧化、控制一定的条件进行水解，可以确保合成的锑酸钠中铁含量在0．06％以下，锑进入成品锑酸钠中的直接产率为90％～95％。精矿中硫以单质形式存在于浸出渣中。     

辉锑矿电氯化浸出与锑的同时电积

直接湿法生产锑白的研究推动了湿法炼锑工艺的发展,近年防腐蚀材料的进展使湿法冶金设备有较大突破,因而国内已报道过几种酸性湿法炼锑。本文报道在同一设备完成锑矿浸出与电积的一步炼锑法新工艺。     

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.