敞口酸溶- 电感耦合等离子体发射光谱法测定锑精矿中的砷

锑精矿中的砷采用常规王水溶解不能有效的分解矿石中的硅酸盐组分导致分解不彻底,后续提取过程中锑的水解会对砷有一定的包裹造成砷测定结果偏低.本文采用氢氟酸-盐酸-硝酸-高氯酸混合体系敞口酸溶后加入酒石酸与锑络合抑制锑的水解消除锑沉淀对砷的包裹,在电感耦合等离子体发射光谱法分析过程中通过分析谱线的选择,对其中的砷进行准确测定,方法精密度(RSD,n=12)为0.99％～1.52％,回收率为97.8％～99.6％,方法检出限为1.01μg/g.本方法能快速有效溶解锑精矿并避免锑水解对砷的包裹,经国家一级标准物质GBW07175和GBW07176验证,所得结果与标准值一致,能够对锑矿石中含量范围在0.1～10％的砷进行快速准确测定.     

氢化物—原子荧光光谱法同时测定金属镍和氧化镍中微量砷和锑

研究了在氨性溶液中,利用氢氧化镧共沉淀富集分离镍中微量砷和锑,同时与其他元素分离,用氢化物－原子荧光光谱法同时测定砷和锑。系统考察了测定的最佳条件及共存元素对测定的影响。本方法操作简便、快速、灵敏度高。砷和锑的检出限分别为０．０００３７μｍ／ｍＬ和０．０００５７μｍ／ｍＬ,样品测定下限分别为０．１μｍ和０．１５μｍ,测定的相对标准偏差分别为２．２％和４．５％。回收率均为９５％～１０３％。     

青海某难选金锑矿石综合回收选矿试验研究

青海某金矿石属少硫化物石英斑岩型微细浸染状金矿石,金粒度小于0.005mm,主要包裹在硅酸盐、碳酸盐以及含砷黄铁矿等硫化物中,有害元素砷含量较高,属于难选冶矿石。针对该矿石性质进行了原矿直接氰化浸金,原矿氧化焙烧-氰化浸金及浮选等工艺流程的对比试验。结果表明,锑金优先浮选-金精矿抑砷浮选是处理该矿较为合理的工艺。锑、金分别经过两次粗选、两次扫选、两次精选,可获得锑品位为57.00%,锑回收率为62.70%的锑精矿,金品位为32.35g/t,金回收率为73.28%的金精矿。      

高砷锑金精矿矿浆电解小型试验研究

研究了"矿浆电解法"在高砷锑金精矿浸出中的应用。系列条件试验结果表明,矿浆电解处理高砷锑金精矿较优的工艺条件为50 g精矿、电流2.04 A、温度60℃、时间6 h、HCl 30 g/L、NH4Cl 200 g/L、Fe3+3 g/L、L/S=15²0∶1。在该条件下对精矿进行了综合验证试验,锑的浸出率达到99%,浸出渣含锑小于0.5%,金和砷均抑留在渣中待处理,阴极电沉积锑含锑98.5%、砷0.11%、金0.12 g/t。矿浆电解法处理高砷锑金精矿运行效果良好且稳定。     

贵州某高砷锑矿石选矿试验

贵州某高砷锑矿石锑含量为0.61%、砷含量为1.02%,锑主要以辉锑矿形式存在,砷主要以毒砂形式存在。为给该矿石中锑、砷回收提供技术依据,对其进行了选矿试验。抑锑浮砷、锑砷混合浮选再分离、浮锑抑砷原则流程对比试验结果表明,浮锑抑砷工艺流程指标较好。在磨矿细度为-0.074 mm占92.78%条件下,采用浮锑抑砷工艺流程选锑,以水玻璃为抑制剂、硝酸铅为活化剂、丁铵黑药+乙硫氮为捕收剂、2号油为起泡剂,经1粗1精优先选锑,获得了锑品位为57.49%、回收率为79.52%的锑精矿,砷含量为0.54%,选锑尾矿经1粗2精2扫浮选流程选砷,获得的砷精矿砷品位为10.17%、金品位为29.16 g/t、砷回收率为82.79%、金回收率为80.98%,砷精矿中锑品位为1.04%,实现了砷锑的高效分离回收。     

含铋高锑冶炼渣浸出液梯级分离回收砷、锑、铋

针对传统锑、铋分离过程中,砷、锑、铋分离不彻底,有价元素回收率不够高等问题,采用还原沉砷、水解沉锑、中和除氯、中和沉铋等方法对含铋高锑冶炼浸出液进行处理,对温度,反应时间等影响条件进行了考察.结果表明,在最佳条件下,通过加入次亚磷酸钠将砷酸根还原为砷单质,最后砷以氧化砷的形式被回收,回收率达到了91.99％;沉砷后液加...     

铁镧共沉淀分离ICP-AES法测定含铜物料中砷锑铋

研究含铜物料中砷、锑、铋的测定方法.试样用硫酸、硫酸钾高温溶解,在氨性溶液中采用氢氧化铁和氢氧化镧作载体一次共沉淀砷、锑、铋,并与铜等分离,在稀盐酸、酒石酸介质中用ICP-AES法连续测定含铜物料中砷、锑、铋的方法,操作简便,快速准确.适用于含铜物料中砷（0.002%～6.0%）、锑（0.002%～10.0%）、铋（0.002%～6.0%）的测定,其（n=11）相对标准偏差分别为3.12%～0.76%、2.11%～0.46%和5.00%～0.88%.加标准回收率,砷、锑、铋均在（99.80%～100.19%）之间,能有效地满足含铜物料中砷、锑、铋的日常检测分析.     

富砷锑金矿石浮选分离试验研究

对某富砷锑金矿石进行了浮选分离试验研究。在弱酸性条件下, 以硝酸铅作活化剂, 以丁基铵黑药作捕收剂, 采用浮锑抑砷工艺, 最终获得含锑63.18%、回收率95.05%的锑精矿和含金9.02 g/t、含砷9.32%、金回收率为65.06%、砷回收率为64.97%的金砷混合精矿。     

锑、银的提取分离及锑白生产

四川省白玉县呷村银多金属矿经分选产出的铜精矿除富含铜、银外,还含有相当数量的铅、锌、锑、砷等元素,成分复杂,其中铜矿物以黝铜矿为主。在总结国内外有关研究的基础上,采用半硫酸化焙烧除砷—焙砂两段浸出铜、锌—氯盐浸出锑、银—Na Cl O3氧化提金的工艺,对该复杂铜精矿的处理和伴生有价元素的综合回收进行了系统的试验研究。重点介绍了锑、银的提取分离和锑白的生产情况。     

浅谈再生铜火法精炼除砷锑

本文在介绍了再生铜概况,以及砷锑的危害和再生铜火法精炼的理论基础简介与国内外目前除砷锑的工艺现状。从分析除砷锑的理论基础上得出了影响除砷锑效果的三个主要因素即是铜液中砷锑的活度系数与反应平衡常数以及活度。简单介绍了目前国内外的几种除砷锑的造渣剂：硅酸盐造渣剂、碱性造渣剂、多磷酸复合型造渣剂及FRHC法。     

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