铝阳极氧化膜冷封闭方法的研究

本文介绍了研制成功的冷封闭方法。该冷封闭液由ＮａＦ、Ｎｉ（ＡＣ）２．４Ｈ２Ｏ以及合适的添加剂ＨＡＤ１、缓蚀剂ＨＩＮ１组成。采用直流和交流方法所得铝氧化膜的封闭质量均达到ＩＳＯ３２１０标准，在ＨＣｌ、ＮａＣｏ３腐蚀介质中有很强的耐蚀性能。     

N,N-二辛基甘氨酸萃取钯机理的研究

报道了Ｎ,Ｎ－二辛基甘氨酸从盐酸体系中萃取钯的机理,结果表明：钯的萃取率随酸度、氯离子浓度、钯离子浓度的增大而降低。采用斜率法测得萃合物组成为：Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＨＰｄＣｌ４,其萃取反应式为：Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＣｌ（Ｏ）＋ＨＰｄＣｌ＾－４（Ａ）＝Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＨＰｄＣｌ４（Ｏ）＋Ｃｌ＾－（Ａ）。     

Ni（OH）2热分解动力学的非等温技术研究

由Ｎｉ（ＯＨ）２在升温过程中的ＴＧＡ和ＤＳＣ曲线，研究其热分解反应的动力学，实验结果表明，Ｎｉ（ＯＨ）２粉体从４８９Ｋ时开始分解，６２６Ｋ时分解完毕，反应的活化能为１２５．２５ｋＪ／ｍｏｌ。化学反应是分解过程的控制环节。     

用三辛胺浸渍的聚氨酯泡沫塑料从水溶液中回收铀

《Ａｎａｌｙｓｔ》１９９８年第１２３卷第１期刊登了ＹａｓｅｍｉｎＴ．等人用三辛胺（ＴＯＡ）浸渍的聚氨酯泡沫塑料从水溶液中回收铀的文章。作者对萃取条件和解脱进行了详细研究。最佳萃取条件为：水溶液中铀浓度为２５×１０－６；萃取溶液酸度为ｐＨ＝２；萃取溶液体积与ＴＯＡ浸渍的聚氨酯泡沫塑料的质量比为５００（ｍＬ／ｇ）；ＴＯＡ－环己烷溶液中ＴＯＡ浓度为１０％（Ｖ／Ｖ）；萃取时间为１ｈ；萃取温度为２３℃。在上述最佳条件下，铀的回收率为９０．０±３．０％。用（ＮＨ４）２ＳＯ４、Ｎａ２ＣＯ３、ＮＨ４Ｃｌ－ＨＣＩ…     

碱性NaCl溶液中铜阳极生成Cu2O的机理

用线性电势扫描法、计时电势法、循环计时电势法、旋转盘－环电极法及稳态极化曲线研究了碱性氯化钠溶液中铜阳极生成Ｃｕ２Ｏ的动力学，实验得到Ｃｕ２Ｏ的生成机理为：Ｃｕ＋Ｃｌ－ＣｕＣｌ－吸ＣｕＣｌ－吸＋（ｎ－１）Ｃｌ－－ｅＣｕＣｌ１－ｎｎＣｕＣｌ１－ｎｎ＋２ＯＨ－Ｃｕ（ＯＨ）－２＋ｎＣｌ－Ｃｕ（ＯＨ）－２１２Ｃｕ２Ｏ＋１２Ｈ２Ｏ＋ＯＨ－第四步为速度控制步骤     

方铅矿矿浆电解热力学

对方铅矿（ＰｂＳ）在氯盐水溶液中的溶解度，ＰｂＳ－Ｃｌ－Ｈ２Ｏ系φ－ｐＨ与φ－ｌｇ〔Ｃｌ－〕图的分析表明：在矿浆电解时方铅矿可同时以三种机理浸入溶液，即１．ＰｂＳ的化学溶解ＰｂＳ（ｓ）＋２Ｈ＋（ａｑ）＝ＰｂＣｌ２－４（ａｑ）＋Ｈ２Ｓ（ａｑ）；２．ＰｂＳ被水溶液中Ｃｕ（Ⅱ）与Ｆｅ（Ⅲ）氧化ＰｂＳ（ｓ）＋２Ｃｕ（Ⅱ）（ａｑ）＋４Ｃｌ－（ａｑ）＝ＰｂＣｌ２－４（ａｑ）＋２Ｃｕ（Ｉ）（ａｑ）＋ＳＯ（ｓ）３．阳极氧化ＰｂＳ（ｓ）＋４Ｃｌ－（ａｑ）－２ｅ＝ＰｂＣｌ２－４（ａｑ）＋ＳＯ（ｓ）元素硫既可通过ＰｂＳ氧化而生成于矿粒表面，也可通过溶液中的Ｈ２Ｓ氧化而生成单独的元素硫颗粒，黄铁矿的共生有利于化学氧化过程的进行。     

Ni2+和Co2+对氧化亚铁硫杆菌活性的影响

为配合细菌浸出金川低品位镍矿中镍和钴的生物冶金研究工作,分别研究了Ｎｉ＾２＋、Ｃｏ＾２＋对试验用氧化亚铁硫杆菌的活性影响。结果表明,在常用的细菌浸出条件（３０℃,ＰＨ２０）下,Ｎｉ＾２＋、Ｃｏ＾２＋对该菌株的活性有较大影响,经过在含一定的浓度的Ｎｉ＾２＋、Ｃｏ＾２＋培养基中驯化后,该菌株已基本上能适应耐（Ｎｉ＾２＋）４０ｇ．１＾－１,（Ｃｏ＾２＋）３０ｇ．１＾－１,具有较强的氧化２Ｆｅ＾２＋的能力     

高锰酸钾氧化沉淀法脱除氯化钴溶液中的锰

低品位钴精矿经焙烧、浸出、Ｎ２３５萃取净化后得到的ＣｏＣｌ２溶液中尚含较多量的Ｍｎ＾２＋。本文研究用ＫＭｎＯ４氧化沉淀法脱除ＣｏＣｌ２溶液中Ｍｎ＾２＋的方法和原理。研究表明，该方法具有除锰彻底（除锰率大于９９％），钴回收率高（大于９８％），操作简单等优点，所得到的净化液适于制备高纯钴产品。     

方波伏安法同时测定U_3O_8中Cu、Ph、Zn、Cd、Fe、Co、Ni、Mn

Ｕ３Ｏ８试样用硝酸分解后，用ＴＢＰ－ＣＣｌ４溶液萃取分离铀，水相用ＨＣｌＯ４蒸干，残渣溶于０．０５ｍｏｌ／Ｌ的ＨＣｌＯ４和０．０３ｍｏｌ／Ｌ的酒石酸混合底液中，用方波阳极溶出伏安法测定Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ，然后用氨水调节ｐＨ为９．５，用方波极谱法测定Ｆｅ、Ｍｎ，最后加入２０μＬ丁二酮肟用络合物吸附波催化方波极谱法测定Ｎｉ、Ｃｏ．标样测定结果接近给出的中位值，精密度高．变异系数在２．１％－９．７％之间。     

ICP－AES法测定四氟化铀标准物质中Cr、Fe、Mo、Ni和Ti

本法采用２５％（ＮＨ４）２ＣＯ３和Ｈ２Ｏ２溶解ＵＦ４，利用２３７－季铵萃淋树脂色谱分离技术，将ＵＦ４中铀与待测杂质元素在６．５ｍｏｌ·Ｌ（－１）ＨＮＯ３介质中定量分离后，及９７５型ＩＣＰ直读光谱仪同时测定ＵＦ４标准物质中Ｃｒ、Ｆｅ、Ｍｏ、Ｎｉ和Ｔｉ。取样３００ｍｇ时，分析结果均落在标准值的置信区间内，相对标准偏差＜１０％。测定下限为０．０４×１０－６～０．０７３×１０－６。     

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.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

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.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

铜熔炼中锍品位对杂质元素分配行为的影响

借助于多相、多成分系统中平衡计算的手段，开发出微量元素砷、锑、铋及伴生元素铅、锌等在铜熔炼中分配行为的计算机模型。利用该模型对铜熔炼过程进行计算机模拟，分析了冰铜品位对砷、锑、铋、铅和锌等杂质元素的分压、活度系数及它们在冰铜、炉渣和气相中分配率的影响，并讨论其热力学分析结果对生产实践的指导意义。     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,